JPH0932253A - Double floor structure and double floor type air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To install a panel with no backlash even when there are some irregularities on a floor surface. SOLUTION: This double floor structure is provided with many panels 1 each having a flat floor plate section and a plurality of leg sections protruded downward from corner sections and arranged on the floor surface and connecting leg seats Z installed on the floor surface and integrally supporting leg sections 40 of the adjacent panels 1. Each connecting leg seat 2 is constituted of a leg receiving body 8 formed with a plurality of leg receiving holes 20 fitted with the lower ends of the leg sections 40 and a support cylinder 6 having a female screw section 10 screwed to a male screw section 18 formed on the outer periphery of the leg receiving body 8. When the support cylinder 6 is rotated, the height of the leg receiving body 8 can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double floor structure for underfloor wiring or underfloor air conditioning, and a double floor air conditioner using the same.

[0002]

2. Description of the Related Art In recent years, on a floor surface of an office building or the like, square panels having legs at four corners are arranged to form a double floor structure, and electric wiring and piping are performed through a space between these panels and the floor surface. As a result, it is widely practiced to increase the flexibility of wiring and the like.

[0003]

However, the floor on which this type of panel is installed is not always a perfectly horizontal surface,
It is common for some irregularities to occur. In such a case, in the conventional double floor structure, one of the legs of the panel floats from the floor surface, and a step is generated between the panels,
There was a problem that the panel rattled and generated discomfort and noise. The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a double floor structure and a double floor air conditioner in which a panel can be installed without rattling even if there is some unevenness on the floor surface.

[0004]

A double floor structure according to the present invention has a flat floor plate portion and a plurality of leg portions projecting downward from each corner of the floor plate portion, and has a large number on the floor surface. A double floor structure comprising a panel to be arranged and a connecting leg seat installed on the floor surface and collectively supporting the leg portions of adjacent panels, wherein the connecting leg seat is A leg receiver having a plurality of fitting portions to which the lower ends of the legs are fitted,
A support that supports this leg receiver at a variable height from the floor,
A height adjustment mechanism is provided between the leg receiver and the support, and a height adjusting mechanism is provided for changing a position of the leg receiver with respect to the support.

On the other hand, the double floor type air conditioner according to the present invention is
A pipe for circulating a heat medium is installed below the floor plate portion of at least a part of the panel, which has the double floor structure, and further circulates a heat medium heated or cooled through these pipes. The heat medium circulation mechanism is provided.

[0006]

1 to 8 show an embodiment of a double floor type air conditioner according to the present invention (including a double floor structure according to the present invention). This double floor type air conditioner is shown in FIG.
As shown in FIG. 3, a large number of connecting leg seats 2 installed at regular intervals on the floor surface of the building, and the leg portions 40 fixed to each other by these connecting leg seats 2 are used for the entire floor surface or Panel 1 arranged in part and panel 1 along the boundary of each panel 1
It is provided with a pipe 4 for circulating a heat medium, which is laid between the floor and the floor surface, and a heat medium circulating mechanism (see FIG. 9) for circulating the heat medium heated or cooled through these pipes 4. The portion excluding the pipe 4 and the heat medium circulation mechanism from the double floor type air conditioner corresponds to the double floor structure according to the present invention.

As shown in FIG. 2, the connecting leg seat 2 is formed by coaxially accommodating a disk-shaped plastic leg receiver 8 in a cylindrical support cylinder 6. The support cylinder 6 has an internal thread portion 10 formed coaxially on the inner peripheral surface thereof, and an annular flange portion 12 formed at the lower end. As shown in FIG. 3, a large number of bonding holes 14 are formed in the flange portion 12 at regular intervals in the circumferential direction. An adhesive agent is applied to the lower surface of the flange portion 12, and the flange portion 12 passes through the bonding holes 14. By raising the adhesive like a rivet to the upper surface of
The adhesive strength to the floor is enhanced. However, the connecting leg seat 2 does not necessarily have to be adhered to the floor surface. A plurality of rotation ribs 16 are formed on the upper surface of the flange portion 12, and these rotation ribs 16 serve to reinforce the flange portion 12 and to prevent slippage when the support cylinder body 6 is gripped and rotated. There is.

The material of the support cylinder 6 is not limited, but generally a cast product of metal such as aluminum is suitable. In that case, the support cylinder 6 can be easily molded, and there is no risk of burning in the event of a fire. On the other hand, since the leg receiver 8 is surrounded by the support cylinder 6,
Even when the leg receiving body 8 is molded from plastic, which is inexpensive in molding cost, combustion can be prevented if the support cylinder 6 is formed of a non-combustible material.

A male screw portion 18 is coaxially formed on the outer periphery of the leg receiver 8, and the male screw portion 18 is screwed into the female screw portion 10 of the support cylinder 6. As shown in FIG.
As shown in FIG. 4, four shallow leg receiving holes 20 are formed so as to be rotationally symmetric with respect to the center by 90 °. At the center of the bottom surface of each of the leg receiving holes 20, as shown in FIG. One or more muffling protrusions 22 are integrally formed. The silencing protrusion 22 abuts on the center of the lower end surface of the leg portion 40 of the panel 1 and elastically deforms, whereby the coupling leg seat 2 and the panel 1 are provided.
This has the effect of reducing noise due to rattling between and.

Around the leg receiving holes 20, there are formed peripheral wall portions 24 and 26 each having a rectangular tube shape as a whole.
The inner wall surfaces of the peripheral wall portions 24 and 26 have a shape that slightly expands upward, so that the leg portion 40 can be easily inserted into the leg receiving hole 20. Further, as shown in FIG. 3, a circular pipe support jig 30 is provided in a portion surrounded by the four peripheral wall portions 24.
The lower end of can be inserted and fixed. The upper end of the pipe support jig 30 has a semicircular pipe support recess 30A.
The pipe 4 is horizontally supported along the boundary of each panel 1 by fitting the pipe 4 into the pipe supporting recess 30A. Thus, since the pipe 4 is supported with the leg receiver 8 as a reference, there is an advantage that the height of the pipe 4 is adjusted in conjunction with the height adjustment of the leg portion 40.

A pair of slits 28 are formed between the peripheral wall portion 24 and the peripheral wall portion 26. Through these slits 28, a panel support pipe 48 in the form of a rectangular tube is vertical without rattling, as shown in FIG. In addition, it can be mounted coaxially on the leg receiver 8. The method of using the panel support pipe 48 will be described later. On the other hand, a plurality of recesses 32 and 34 are formed on the lower surface of the leg receiver 8 to reduce the weight of the leg receiver 8 and reduce the amount of resin.

6 and 7 are a plan view and a vertical sectional view showing the panel 1 used in this embodiment. FIG.
The right half of the figure shows the upper surface of the panel 1, and the left half shows the lower surface of the panel 1. The panel 1 is formed by casting a metal such as aluminum or by sintering ceramics, and has a square floor plate portion 42 and the floor plate portion 4.
2 has four square-shaped leg portions 40 extending downward from the lower surfaces of the four corners 2 and a large number of grid-like reinforcing ribs 44 are formed on the lower surface of the floor plate portion 42. Although the size of the panel 1 is not limited, for example, one side is 249 mm.
It is said. If the panels 1 of this size are arranged at intervals of 250 mm, a gap C of 1 mm is uniformly formed between the panels 1. By forming such a gap C,
An important effect as will be described later can be obtained.

The lengths of the legs 40 are all the same, and the lower ends thereof are sized and shaped to fit into the leg receiving holes 20 of the leg receiving body 8. The leg portion 40 is formed at a position closer to the center by a certain distance from each vertex of the floor plate portion 42. The pair of side surfaces parallel to the peripheral wall of the rib 44 that connects the leg portions 40 to each other is shown in FIG.
As shown in, a curved pipe facing surface 44A is formed along the outer peripheral surface of the pipe 4 to prevent interference between the pipe 4 and the panel 1.

The floor plate portion 42 also has a pipe facing surface 44A.
One or more notches 46 are formed along one side orthogonal to (six in the figure). These notches 46 are portions surrounded by semicircular grooves formed on both sides of the floor plate portion 42. When the notches 46 are sandwiched with pliers and broken along the grooves, the semicircular notches are formed. Can be formed. If such a notch is formed at a position where a pair of adjacent panels 1 face each other, a circular opening is formed, and wiring and piping can be drawn out through this opening.

As shown in FIG. 2, all the panels 1 have a fixed gap C (for example, 1 to 5 mm) between the adjacent floor plate portions 42 with the leg portions 40 fixed by the connecting leg seats 2. ) Is sized to be empty. The gap C not only serves as a ventilation path for letting the warm air or the cool air generated from the pipe 4 escape to the panel 1, but when the connecting leg seat 2 is not adhered to the floor surface, a double floor is caused by an earthquake. When a horizontal compressive force is applied to the structure, the compressive force is absorbed to prevent the panel 1 from being deformed or damaged. When the connecting leg seat 2 is not adhered to the floor surface, when a compressive force is applied due to an earthquake, the leg portions 40 of each panel 1 are fixed to each other by the leg receiving body 8. The floor structure as a whole tends to be curved in a downward convex shape. For this reason, the panel 1 is strongly pressed toward the floor surface, and there is no fear that the panel 1 will float up and fall apart. Further, the gap C also serves as a relief when the panel 1 is thermally expanded, and has an advantage that the construction can be facilitated.

FIG. 9 is a schematic view showing an example of the heat medium circulation mechanism, and the double floor structure is omitted in this figure. The pipe 4 has a meandering shape as a whole, and the heat medium temperature adjusting device 6
The heating medium heated or cooled through 0 and the circulation pump 62 circulates in the pipe 4.

The heating medium temperature adjusting device 60 may be of any known type, but the present inventor has invented a device as shown in FIG. 11 as a particularly preferable heating medium temperature adjusting device 60. This apparatus has a rectangular parallelepiped first tank 70 and a second tank 72 that are independent of each other, and the outer peripheral surfaces of these tanks 70 and 72 are covered with a thick heat insulating material 74. The material of the tanks 70 and 72 is not limited, but in consideration of weight reduction and ease of carrying in and assembling into a house, an assembling type made of a material such as fiber reinforced plastic (FRP) is preferable.

Below the tanks 70 and 72, a heat insulating material 74 is provided.
A Peltier element unit 76 in which a large number of Peltier elements are integrated is arranged in a state of being covered with. The Peltier element unit 76 has one surface that absorbs heat and the other surface that generates heat when energized. One end of a heat transfer body 78 such as a heat pipe is fixed to the heat absorption surface, and the other end of the heat transfer body 78 is One end of a heat transfer body 80 such as a heat pipe is fixed to the heat generating surface, while the other end of the heat transfer body 80 is projected into the second tank 72. As a result, the Peltier element unit 76 is configured to cool the water filled in the first tank 70 and heat the water filled in the second tank 72 when energized.

Electric heaters 82 and 84 are fixed to the inner bottom surfaces of the first tank 70 and the second tank 72, respectively, and heat the water in the tanks 70 and 72 by energization. Horizontal partition walls 93, 97 are arranged at a lower portion in the first tank 70 with a space therebetween, and a rectangular parallelepiped stirring body 90 is arranged so as to be slidable in the horizontal direction so as to block between them. The stirring body 90 can be reciprocated by a screw shaft 88 rotated by a motor 86. Further, the partition wall 95 is fixed to one end of the lower partition wall 97 in an upright state and extends to the upper portion of the tank 70. The partition wall 95 is disposed close to the side wall surface of the first tank 70, and when the stirring body 90 is moved horizontally, the partition wall 9 is formed.
The water between 3 and 97 moves, and the water between the partition wall 95 and the side wall surface flows up and down, so that the water in the first tank 70 is totally stirred. As a result, even when the water is cooled below the freezing point, it can be kept in a sherbet shape.

Inside the first tank 70, a large number of heat storage bodies 9 are provided via a support frame 92 arranged above the stirring body 90.
4 are housed horizontally at a distance from each other. As shown in FIG. 12, these heat storage bodies 94 are obtained by filling a heat storage material 116 in a thin tube 114 made of stainless steel or the like having excellent corrosion resistance. In the illustrated example, both ends of the tube 114 are flatly crushed and folded by being bent over a certain length to be sealed. If such a sealing structure is adopted, the production cost can be reduced as compared with the method of sealing the tube 114 by welding or the like. The heat storage material 116 exhibits a heat storage effect when heating the water in the first tank 70, and a substance that solidifies at about 50 ° C. is preferable. Specific examples of the substance include sodium acetate trihydrate (CH ₃ COONa.3H ₂ O, melting point 58 ° C.).

An outlet pipe 96 and an inlet pipe 98 are connected to the lower end portion of the first tank 70, and the cooled or heated water in the first tank 70 is discharged through the outlet pipe 96 and doubled. Water from the pipe 4 in the floor returns to the first tank 70 via the inlet pipe 98. The drainage pipe 96 is connected to the radiator 100, and is connected to the first tank 7
If the water in 0 is too cold or too hot than the set temperature, after being adjusted to an appropriate temperature by the radiator 100,
It is designed to be sent to the pipe 4 in the double floor. The radiator 100 includes a heat exchanger (not shown) through which water passes, and a blower fan 101 that blows air onto the heat exchanger,
Preferably, as shown, the window (or door) 10 of the building
It is arranged so that the air passing through the heat exchanger is discharged toward the lower part of 6. Thus building windows (or doors)
A window (door) that is easily affected by the outside air temperature by blowing out cooled or heated air toward the bottom of 106.
It is possible to supplement the cooling or heating effect of the surrounding area. Although the set temperature of the water circulated in the pipe 4 is not limited, it is generally 10 to 18 ° C. during cooling.
The temperature is set to about 45 to 50 ° C during heating.

A temperature sensor 104 is fixed to the outlet pipe 102 from the radiator 100, the temperature of the water in the outlet pipe 102 is measured by the temperature sensor 104, and the rotation speed of the blower fan 101 in the radiator 100 is not shown. The circuit is feedback-controlled.

On the other hand, below the second tank 72, an inlet pipe 108 having an inlet valve 110, and an outlet valve 1
The outlet pipes 112 with 14 are each connected.
The inlet pipe 108 is connected to the water supply, and the outlet pipe 112 is connected to the hot water supply facility in the building.

Heat medium temperature adjusting device 60 having the above construction
According to the above, it is possible to easily switch between cooling and heating according to the season as follows. When cooling is performed in the summer, the Peltier element unit 76 is operated in advance to cool the water in the first tank 70 and heat the water in the second tank 72. At that time, the agitator 90 is continuously reciprocated so that the water in the first tank 70 does not freeze even when the water in the first tank 70 is below the freezing point, and is in a sherbet shape. Since the Peltier element unit 76 discharges a heat amount that is about three times the heat absorption amount, the water in the second tank 72 becomes hot water of sufficiently high temperature, and the outlet pipe 1
It is supplied to the hot water supply facility in the building through 12.

When the water in the first tank 70 is sufficiently cooled, the circulation pump 62 (see FIG. 9) is operated to guide the cold water to the radiator 100, and based on the signal from the temperature sensor 104, the cold water has an appropriate temperature (generally, a normal temperature). The blower fan 101 is operated so that the temperature becomes 10 to 18 ° C.). The cold water that has been adjusted to an appropriate temperature is supplied to the pipe 4 under the floor through the outlet pipe 102. The water circulating in the pipe 4 returns to the first tank 70 through the water absorption pipe 98 and is cooled again.

On the other hand, when heating is performed in the winter, instead of operating the Peltier element unit 76, the electric heater 82,
84 is energized to heat the water in the tanks 70 and 72. The hot water in the second tank 72 is supplied to the hot water supply facility as before. The warm water in the first tank 70 is the circulating pump 6
2 (see FIG. 9) to the radiator 100, and the blower fan 101 is operated according to a signal from the temperature sensor 104 so that the warm water has an appropriate temperature (generally 45 to 50 ° C.). The hot water having an appropriate temperature is supplied to the pipe 4 under the floor through the outlet pipe 102, and the water circulating through the pipe 4 returns to the first tank 70 through the water absorption pipe 98 and is heated again.

In the heat medium temperature adjusting device 60 having such a configuration, while the Peltier element unit 76 produces the cold water, the waste heat can be used to produce the hot water and supply it to the hot water supply facility. There is an advantage that the entire apparatus can be made compact.

In order to install the double-floor structure and the double-floor type air conditioner having the above-mentioned structure, first, the reference lines are drawn in a grid pattern on the floor at a constant pitch, and then the reference lines are aligned with each other.
Connecting leg seat 2 in which adhesive is applied to the lower surface of the flange portion 12
Are placed on the floor one after another. Before the adhesive solidifies,
The leg portions 40 of the panel 1 are sequentially inserted into the leg receiving holes 20 of the connecting leg seats 2, and when all the leg portions 40 are fixed to the connecting leg seats 2, the levelness of the panel 1 is set to a level or the like. Use and check.

When inclination or rattling of the panel 1 with respect to the desired arrangement surface is detected, the support cylinder 6 supporting the leg portion 40 whose height is to be changed is rotated. Then, since the rotation of the leg receiver 8 inside the support cylinder 6 is blocked by the panel 1, relative rotation between the support cylinder 6 and the leg receiver 8 occurs, and the leg receiver 8 is moved along the female screw portion 10. Since the panel 1 can be moved up and down, the panel 1 is aligned on a desired plane and the leg 40 is adjusted so that the leg 40 does not rattle. After the height adjustment is completed in this way, if the support cylinder 6 is left as it is without moving, the adhesive solidifies and the support cylinder 6 is fixed to the floor surface. The support cylinder 6 does not necessarily have to be adhered to the floor surface, and the connecting leg seat 2 may simply be left on the floor surface.

In this way, a large number of panels 1 are arranged on the entire floor surface of the room, and when a blank space smaller than the panel width is finally generated, the panel 1 is cut to a size that fits the blank space, and the cut end of the panel 1 is cut. Is supported by the connecting leg seat 2 to which the panel support pipe 48 is attached as shown in FIG. The panel support pipe 48 has a size that fits between the ribs 44, and is cut to a rough size according to the support height of the panel 1. Also in this case, the support height of the panel 1 can be finely adjusted by rotating the support cylinder 6.

As described above, according to the double-floor structure and the double-floor type air conditioner, the leg portion of each panel 1 can be adjusted according to the inclination and the unevenness of the floor surface simply by rotating the support cylinder 6. 40
It is possible to individually adjust the support heights of the above, and it is easy to prevent the inconvenience that a step is generated in the adjacent panel 1 or the panel 1 rattles.

Further, since the connecting leg seat 2 has a simple structure composed of the supporting cylinder body 6 and the leg receiving body 8 which are screwed together,
Mass production is possible at low cost, and construction cost per unit area is low. When the support cylinder 6 is made of metal and the leg receiver 8 is made of plastic, the molding cost of the leg receiver 8 having a relatively complicated shape can be reduced, and the support cylinder 6 is made of plastic. Leg receiver 8
It is possible to reduce the risk that the leg support 8 will spread by fire even if a fire occurs.

Further, since a slight gap is formed between the panels 1, it is possible to prevent the panel 1 from being damaged or separated even when a horizontal compressive force is applied during the earthquake. Can be facilitated. Further, since the panel support pipe 48 can be vertically fixed to the connecting leg seat 2, it is possible to use the connecting leg seat 2 also for supporting the cut panel 1, and the cost can be reduced by the combined use. Can be achieved.

Second Embodiment Next, FIG. 10 shows a second embodiment of the double floor structure according to the present invention. In this example, a seismic isolation effect is applied to the above-mentioned double floor structure, and the connecting leg seats 2 selected at a rate of one for each plurality are fixed on the seismic isolation mechanism 50. The point and the other connecting leg seats 2 are characterized by not being adhered to the floor surface. The other structure may be the same as that of the previous embodiment.

The seismic isolation mechanism 50 has a rectangular film-like elastic member 52 having a size slightly smaller than that of four panels at the maximum, and a holding plate 54 for fixing the four sides of the elastic member 52 to the floor surface.
The connecting leg seat 2 is adhesively fixed to the center of the elastic member 52. The elastic member 52 is formed of, for example, a rubber film or the like, is not adhered to the floor surface except the peripheral portion, and has a plurality of through holes 56. These through holes 56 allow air to flow in and out of the elastic member 52, and prevent the phenomenon that the elastic member 52 sticks to the floor surface when the elastic member 52 is deformed. On the other hand, a large number of bonding holes 58 are formed in the pressing plate 54 to facilitate the fixing of the elastic member 52 to the floor surface.

By attaching the seismic isolation mechanism 50 to the connecting leg seats 2 at a ratio of one to a plurality of such seismic isolation mechanisms, even if the panel 1 is entirely displaced due to an earthquake, the elasticity of the elastic material 52 is increased. Since the connecting leg seat 2 is immediately returned to the original position by the force, the displacement of the panel 1 can be automatically repaired. Therefore, it is not necessary to relay the panel 1 after the earthquake.

In each of the above embodiments, the connecting leg seat 2 is used.
As the height adjusting mechanism, the female threaded portion 10 is formed on the support cylinder 6 and the male threaded portion 18 is formed on the leg receiver 8. However, these are reversed to form the male threaded portion on the support side and the female threaded portion on the leg receiver. Of course, you can do that. Further, the height adjusting mechanism is not limited to the screw mechanism, and other conventionally known height adjusting mechanism may be used. Further, the shape of the panel 1 is not limited to a square shape, and may be a rectangular shape or a triangular shape as required as long as it can be spread with a uniform interval. .

[0038]

As described above, according to the double-floor structure and the double-floor type air conditioner according to the present invention, the inclination of the floor surface is increased by operating the height adjusting mechanism of the connecting leg seat. It is possible to individually adjust the support height of the leg portion of each panel according to the unevenness, and it is possible to prevent the inconvenience that a step is generated in the adjacent panel or the panel rattles.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a double floor type air conditioner according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a connecting portion between a panel and a connecting leg seat in the same embodiment.

FIG. 3 is a plan view of a connecting leg seat in the same embodiment.

FIG. 4 is a vertical sectional view of a leg receiver in the same embodiment.

FIG. 5 is a bottom view of the leg receiver in the same embodiment.

FIG. 6 is a plan view of the panel according to the same embodiment.

FIG. 7 is a vertical cross-sectional view of the panel according to the same embodiment.

FIG. 8 is a plan view showing a state in which a panel support pipe is fixed to a connecting leg seat in the same embodiment.

FIG. 9 is a schematic view showing a heat medium circulation mechanism in the same embodiment.

FIG. 10 is a plan view showing another embodiment of the double floor structure according to the present invention.

FIG. 11 is a sectional view showing a preferred example of a heat medium temperature adjusting device.

FIG. 12 is a partially cutaway front view of a heat storage body used in the heat medium temperature adjusting device.

[Explanation of symbols]

 1 panel 2 connecting leg seat 4 pipe 6 support cylinder (support) 8 leg receiver 10 female screw part (height adjusting mechanism) 12 flange part 18 male screw part (height adjusting mechanism) 20 leg receiving hole (fitting part) ) 22 muffling protrusion 24, 26 peripheral wall portion 28 slit 30 pipe supporting jig 30A pipe supporting concave portion 40 leg portion 42 floor plate portion 44 rib 44A pipe facing surface 48 panel supporting pipe 50 seismic isolation mechanism 52 elastic material 60 heat medium temperature adjusting device 76 Peltier element unit 94 Thermal storage

Claims (9)

[Claims] 1. A panel having a flat floor plate portion and a plurality of legs protruding downward from each corner of the floor plate portion, the panel being arranged in large numbers on the floor surface; A double-floor structure including a connecting leg seat that collectively supports the leg portions of adjacent panels, wherein the connecting leg seat has a fitting portion to which a lower end of the leg portion is fitted. A plurality of leg receivers, a support for supporting the leg receivers at a variable height from the floor surface, and a leg support for the support provided between the leg receivers and the support. A double floor structure comprising a height adjusting mechanism for changing the position of the body. 2. The height adjusting mechanism is a screw portion formed on each of the leg receiving body and the support body and screwed together, and the leg receiving body is placed on the floor by rotating the support body. The double floor structure according to claim 1, wherein the double floor structure is configured to move up and down with respect to one another. 3. The leg receiver has a cylindrical outer peripheral surface, and a male screw portion is formed on the outer peripheral surface, while the support body has a cylindrical inner peripheral surface. The double floor structure according to claim 1, wherein a female screw portion is formed on the base, and the leg receiver is accommodated in the support body in a state where the male screw portion is screwed onto the female screw portion. . 4. The fitting portion of the connecting leg seat has a fitting hole into which a lower end of the leg portion is inserted, and a peripheral wall portion standing upright around the fitting hole. The double floor structure according to any one of 1 to 3. 5. The connecting leg seat is mounted on the floor so as to be movable in the horizontal direction, and at least a part of the connecting leg seats is biased in a direction to correct the horizontal shift. The double-floor structure according to any one of claims 1 to 4, further comprising an elastic body for generating the above. 6. The double floor structure according to claim 4, wherein the peripheral wall portion is formed with a slit for vertically fitting a panel support pipe. 7. The double floor structure according to claim 1, wherein a constant gap is formed between each side of the panels adjacent to each other. 8. A double floor structure according to claim 1, wherein a pipe for circulating a heat medium is installed below the floor plate portion of at least a part of the panel, Furthermore, the double-floor type air conditioner is provided with a heat medium circulation mechanism for circulating the heat medium heated or cooled through these pipes. 9. The pipe is supported by a pipe support jig fixed upright to the leg receiver, and is horizontally piped between leg portions of adjacent panels. 8. The double floor type air conditioner according to 8.