JP2008179975A - Free-access floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a free-access floor capable of reducing the leakage of an electromagnetic wave from a space where a floor panel cannot be laid. <P>SOLUTION: The floor panel 12 makes an underfloor space H formed between the floor panel 12 and a floor surface of a skeleton 20. A border panel 18 is arranged in the space where the floor panel 12 cannot be laid. A gap F between the floor panel 12 and the border panel 18 is closed with a conductive material 50. In this case, a conductive layer 32, which is provided on the side surface of the floor panel 12, and a conductive sheet 44, which is provided on the side surface of the border panel 18, are brought into contact with the conductive material 50. Thus, the gap between the floor panel 12 and the border panel 18 is closed with the conductive material 50, so that the electromagnetic wave leaked from the gap between the floor panel 12 and the border panel 18, adjacent to each other, can be reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a free access floor that shields electromagnetic waves.

  In a free access floor with a double floor structure in which another floor is provided with a space above the building floor of the building structure, when this free access floor is to be shielded from electromagnetic waves, the floor is laid out Generally, the surface of the panel is covered with metal, or the floor panel itself is made of metal.

  For example, in the free access floor 200 shown in the plan view of FIG. 13, a plurality of floor panels 202 are laid out at equal intervals. Further, as shown in FIG. 14, which is a cross-sectional side view taken along the line CC in FIG. 13, the floor panel 202 has a configuration in which a mortar 206 is filled in a metal box 204.

  The floor panel 202 is supported by support legs 210 placed on the floor surface of the housing 208 to form a space for electrical wiring or the like between the floor surface of the housing 208 and the floor panel 202.

  And when electromagnetic waves generate | occur | produce in the room space above the free access floor 200, electromagnetic waves reflect on the metal of the box 204 upper surface, and the electromagnetic wave shielding effect is exhibited.

As shown in FIG. 13, a floor panel having a regular size cannot be used in the border portions S ₁ and S _{2 at} the periphery of the free access floor 200. Therefore, it is necessary to process the floor panel at the site in order to adjust the dimensions of the floor panel. Therefore, in terms of workability, wooden or resin materials are often used for floor panels (hereinafter referred to as border panels) laid on the border portions S ₁ and S ₂ .

For this reason, in the border panel formed of a non-metallic material, since shielding against electromagnetic waves cannot be obtained, electromagnetic waves leak from the border portions S ₁ and S _{2 at} the periphery of the free access floor 200. .

  As shown in FIG. 15, the free access floor 212 of Patent Document 1 is provided with a stringer 216 so as to bridge between the support legs 214 arranged on the foundation floor surface. The floor panel 220 is placed on the upper surface portion of the stringer 216 so that the support portion 218 protruding to the outer periphery is supported.

  The floor panel 220 is a square member formed by die casting using an aluminum alloy or the like.

  As shown in FIG. 16, which is an enlarged cross-sectional view of a fitting portion between the floor panel 220 and the stringer 216, a conductive plate 224 formed of a thin plate material having conductivity is attached to the side wall surface 222 of the floor panel 220. Yes. When the floor panel 220 is placed, the conductive plate 224 elastically contacts the side surface portion of the stringer 216 along the longitudinal direction.

  The head of the support leg 214 is covered with a conduction cap 226, and the conduction plate 224 is in surface contact with the stringer 216 elastically, and the stringer 216 and the conduction cap are formed at the corner of the floor panel 220. Elastically in surface contact with H.226.

  Thereby, the space between the side surface of the floor panel 220 and the stringer 216 and the conductive cap 226 is blocked by the conductive plate 224, and electromagnetic waves can be prevented from leaking from the gap between the adjacent floor panels 220.

However, since it is difficult to change the dimension of the floor panel 220 of Patent Document 1 on site, it is difficult to apply the structure of the free access floor 212 to the border portion.
JP 2002-47786 A

  This invention considers the fact which concerns, and makes it a subject to provide the free access floor which reduces the leakage of the electromagnetic waves from the space where a floor panel cannot be laid.

  According to a first aspect of the present invention, there is provided a free access floor in which an underfloor space is formed between a plurality of floor panels laid above the housing floor surface and the housing floor surface, and at least an upper surface and a lower surface of the floor panel are formed. Conductive layer provided on one side and side, border panel disposed in a space where the floor panel cannot be laid, and conductivity provided on at least one side and side of the upper and lower surfaces of the border panel A conductive material that contacts a sheet, a conductive layer provided on a side surface of the floor panel, and a conductive sheet provided on a side surface of the border panel, and closes a gap between the adjacent floor panel and the border panel; It is characterized by having.

  In the first aspect of the present invention, a plurality of floor panels are laid above the frame floor. An underfloor space is formed between the floor panel and these floor panels. A border panel is arranged in a space where the floor panel cannot be laid (hereinafter referred to as a border portion).

  A conductive layer is provided on at least one surface and side surfaces of the upper surface and the lower surface of the floor panel. In addition, a conductive sheet is provided on at least one surface and side surfaces of the upper and lower surfaces of the border panel.

  Furthermore, the conductive material blocks the gap between the adjacent floor panel and the border panel. At this time, the conductive layer provided on the side surface of the floor panel and the conductive sheet provided on the side surface of the border panel are in contact with the conductive material.

  Therefore, when an electromagnetic wave is generated above or below the free access floor, the electromagnetic wave is reflected on the conductive layer formed on at least one of the upper surface and the lower surface of the floor panel to exhibit an electromagnetic wave shielding effect.

  In the border portion, the electromagnetic wave is reflected on the conductive sheet provided on at least one of the upper surface and the lower surface of the border panel disposed in the border portion, thereby exhibiting an electromagnetic wave shielding effect. Therefore, leakage of electromagnetic waves from the border portion can be reduced.

  Further, by providing a conductive sheet on a border panel whose dimensions have been changed (processed) in the field, the border panel can be easily shielded from electromagnetic waves.

  When the floor panel is laid with a gap between the floor panels, the floor panel can be easily attached and detached. At this time, if the gap between the floor panels is about 1.5 mm or less, electromagnetic waves leaking from the gap between the floor panels are suppressed by the capacitor effect of the conductive layers provided on the side surfaces of the adjacent floor panels. can do.

  In order to make it easy to attach and detach the floor panel, it is desirable to leave a gap between the floor panel and the border panel. However, since the border panel is processed on-site for dimension adjustment, sufficient processing accuracy is obtained. I can't. Therefore, the gap between the floor panel and the border panel may be larger than 1.5 mm. In this case, a sufficient capacitor effect cannot be expected.

  Therefore, in claim 1, electromagnetic waves leaking from the gap between the adjacent floor panel and the border panel can be reduced by closing the gap between the adjacent floor panel and the border panel with the conductive material.

  And since a clearance gap can be ensured between an adjacent floor panel and a border panel, a floor panel can be attached or detached easily by removing a electrically conductive material.

  In addition, when the gap between the adjacent floor panel and the border panel is closed with a conductive material, the conductive sheet affixed to at least one of the upper and lower surfaces of the border panel, the conductivity provided on the side of the border panel Since the sheet, the conductive material, the conductive layer provided on the side surface of the floor panel, and the conductive layer formed on at least one of the upper and lower surfaces of the floor panel are connected to form a series of electromagnetic shielding layers, the free access floor When electromagnetic waves are generated above or below, a high electromagnetic shielding effect can be exhibited.

  The invention according to claim 2 has a conductive material in which a plurality of the border panels are arranged and in contact with the conductive sheets respectively provided on the side surfaces of the adjacent border panels to close the gap between the border panels. It is characterized by.

  In the invention described in claim 2, the conductive material closes the gap between the border panels. At this time, the conductive sheets respectively provided on the side surfaces of the adjacent border panels are in contact with the conductive material.

  Therefore, even when a border panel is laid with a gap between adjacent border panels, electromagnetic waves leaking from the gap can be reduced by the conductive material that closes the gap between the border panels. Therefore, the border panel can be easily attached and detached.

  The invention described in claim 3 is characterized in that the conductive material is a conductive tape.

  In the third aspect of the present invention, the conductive material can be easily attached and detached by using a conductive tape as the conductive material.

  The invention described in claim 4 is characterized in that the conductive material is a conductive sealing material.

  In the invention according to claim 4, by using the conductive material as the conductive sealing material, the gap between the adjacent floor panel and the border panel or the gap between the adjacent border panels can be reliably closed with the conductive material. it can.

  The invention described in claim 5 is characterized in that the conductive material is an elastic body covered with a conductive material.

  In the fifth aspect of the invention, the conductive material can be attached and detached easily by using an elastic body covered with the conductive material. Moreover, the conductive material once used can be used again.

  The invention described in claim 6 is characterized in that the conductive material is a bundle of conductive wires in a sponge shape.

  In the invention according to the sixth aspect, the conductive material can be attached and detached easily by bundling the conductive wire in a sponge shape. Moreover, the conductive material once used can be used again.

  Since this invention set it as the said structure, the leakage of the electromagnetic waves from the space where a floor panel cannot be laid can be reduced.

  A free access floor according to an embodiment of the present invention will be described with reference to the drawings.

  The present embodiment can be applied to various forms of free access floors in which floor panels having conductive layers provided on the surface are laid out.

  First, the free access floor 10 according to the first embodiment of the present invention will be described.

  As shown in the plan view of FIG. 1, on the free access floor 10, a plurality of floor panels 12 are laid out at equal intervals.

  As shown in FIG. 2 which is an enlarged view of FIG. 1, a gap of about 1 mm is left between the floor panels 12. In order to easily attach and detach the floor panel 12, it is preferable to arrange the floor panel 12 with such a gap.

Further, in the space around the free access floor 10 where the floor panel 12 having a regular dimension cannot be laid (hereinafter referred to as border portions K ₁ and K ₂ ), a plurality of border panels 14 and 16 are provided. , 18 are arranged.

  As shown in FIG. 3 which is a cross-sectional side view taken along the line AA of FIG. The floor panel 12 is supported at the four corners of the floor panel 12 by support legs 22 arranged on the floor surface of the housing 20, and forms an underfloor space H for electrical wiring or the like between the floor panel 12 and the floor surface of the housing 20. Yes.

  A border panel 18 is disposed between the wall 24 and the floor panel 12. The border panel 18 is supported at the four corners of the border panel 18 by support legs 26 arranged on the floor surface of the housing 20, and forms an underfloor space H for electrical wiring and the like between the border panel 18 and the floor surface of the housing 20. Yes.

  A long metal plate 28 having an L-shaped cross-sectional shape is provided in the lower portion of the wall portion 24 along the horizontal direction. The metal plate 28 can prevent electromagnetic waves leaking from the wall portion 24.

  As shown in FIG. 4, which is an enlarged view of the vicinity where the floor panel 12 and the border panel 18 are adjacent to each other, the floor panel 12 has hot-dip galvanized steel plates 32 as conductive layers on the upper surface, lower surface, and side surfaces of the particle board 30. It is comprised by providing. That is, the conductive layer is provided on the upper surface, the lower surface, and the side surface of the floor panel 12.

  A receiving portion 34 is provided on the support surface of the floor panel 12 of the support leg 22. The particle board 30 is formed with a substantially vertical through hole 38 through which the screw member 36 passes. The floor panel 12 is fixed to the receiving portion 34 by being screwed into the female screw portion 40 provided in the receiving portion 34 through the through-hole 38.

  The border panel 18 is configured by attaching an aluminum sheet 44 as a conductive sheet to the lower surface and side surfaces of the particle board 46. That is, the conductive sheet is provided on the lower surface and the side surface of the border panel 18.

  A receiving portion 42 is provided on the support surface of the border panel 18 of the support leg 26. The border panel 18 is fixed to the receiving portion 42 by screwing wood screws 48 into the particle board 46 and the receiving portion 42.

  An aluminum tape 50 as a conductive material is pasted from the upper surface of the floor panel 12 to the upper surface of the border panel 18. That is, the gap F between the floor panel 12 and the border panel 18 is closed by the aluminum tape 50 as a conductive material. At this time, the aluminum tape 50 is in contact with the hot dip galvanized steel plate 32 provided on the side surface of the floor panel 12 and the aluminum sheet 44 provided on the side surface of the border panel 18.

  In FIG. 4, the upper end portion of the aluminum sheet 44 is bent at the corner of the upper surface of the particle board 46 in order to make the aluminum sheet 44 provided on the side surface of the border panel 18 and the aluminum tape 50 more reliably contact each other. As shown in FIG. 5, the aluminum sheet 44 may not be bent as long as the aluminum sheet 44 provided on the side surface of the border panel 18 and the aluminum tape 50 are in contact with each other. Similarly, even when the hot dip galvanized steel plate 32 is not provided on the upper surface of the floor panel 12, the hot dip galvanized steel plate 32 provided on the side surface of the floor panel 12 and the aluminum tape 50 are in contact with each other. That's fine.

  A floor carpet 52 is laid on the upper surfaces of the border panel 18, the floor panel 12, and the aluminum tape 50.

  Next, the operation and effect of the free access floor 10 according to the first embodiment of the present invention will be described.

  In the first embodiment, as shown in FIG. 4, when electromagnetic waves are generated above or below the free access floor 10, the electromagnetic waves are reflected on the hot dip galvanized steel plate 32 provided on the upper and lower surfaces of the floor panel 12. And exhibits an electromagnetic shielding effect.

Also in the border section K _2, an electromagnetic wave in an aluminum sheet 44 provided on the lower surface of the border portion K ₂ to arranged the border panel 18 exerts an electromagnetic wave shielding effect and reflection. Therefore, it is possible to reduce the leakage of electromagnetic waves from the border portion K _2.

  Further, by sticking the aluminum sheet 44 to the particle board 46 whose dimensions have been changed (processed) at the site, the border panel 18 can be provided with an electromagnetic shielding property by an easy method.

  As shown in FIG. 6, when the floor panel is laid with a gap between the floor panels 12, the floor panel is easily attached and detached. At this time, if the gap between the floor panels 12 is about 1.5 mm or less, the gap between the floor panels 12 is caused by the capacitor effect of the hot-dip galvanized steel plates 32 provided on the side surfaces of the adjacent floor panels 12 and facing each other. The electromagnetic wave Q leaking from the can be suppressed.

  As shown in FIG. 4, it is desirable to leave a gap between the floor panel 12 and the border panel 18 in order to make the floor panel 12 easy to attach and detach. Since it is processed, sufficient processing accuracy cannot be obtained. Therefore, it is conceivable that the gap between the floor panel 12 and the border panel 18 becomes larger than 1.5 mm. In this case, a sufficient capacitor effect cannot be expected.

  Therefore, in the first embodiment, electromagnetic waves leaking from the gap F between the floor panel 12 and the border panel 18 can be reduced by closing the gap between the floor panel 12 and the border panel 18 with the aluminum tape 50.

  Since a gap can be secured between the floor panel 12 and the border panel 18, the floor panel 12 can be easily attached and detached by removing the aluminum tape 50. Further, by using the aluminum tape 50 as the conductive material, the conductive material can be easily attached and detached.

  When the gap between the floor panel 12 and the border panel 18 is closed with the aluminum tape 50, the aluminum sheet 44 provided on the lower surface of the border panel 18, the aluminum sheet 44 provided on the side surface of the border panel 18, and the aluminum tape 50, since the hot dip galvanized steel plate 32 provided on the side surface of the floor panel 12 and the hot dip galvanized steel plate 32 provided on the upper and lower surfaces of the floor panel 12 are connected to form a series of electromagnetic wave shielding layers. When electromagnetic waves are generated above or below 10, a high electromagnetic shielding effect can be exhibited.

  In the first embodiment, an example of the floor panel 12 configured by providing a hot dip galvanized steel plate 32 as a conductive layer on the surface of the particle board 30 has been described. However, at least one of the upper surface and the lower surface and the side surface are illustrated. The floor panel may be a floor panel provided with a conductive layer, and may be a floor panel in which a metal box is filled with mortar, or a floor panel in which the surface of a wooden board or the like is covered with a metal film. Good. In addition to the hot dip galvanized steel plate 32, an aluminum plate or the like may be used as the conductive layer.

  In any case, the electromagnetic wave generated above or below the free access floor 10 is reflected by the conductive layer provided on the floor panel 12 and exhibits an electromagnetic wave shielding effect. When the conductive layer is provided on the upper surface and the lower surface of the floor panel 12, a double electromagnetic wave shielding layer is formed, so that a high electromagnetic wave shielding effect can be exhibited.

  Moreover, although the example which left about 1 mm gap | intervals between floor panels 12 was shown, the magnitude | size of a gap | interval is comprised by the hot-dip galvanized steel plate 32 provided in the side surface of adjacent floor panels 12 and opposing. As long as the effect of the capacitor to be obtained can be obtained. The larger the gap, the easier the attachment and detachment. Practically, it is preferably about 0.5 mm or more and 1.5 mm or less.

  Moreover, although the example which fixed the floor panel 12 to the receiving part 34 by screwing the screw member 36 to the internal thread part 40 provided in the receiving part 34 was shown, the floor panel 12 is fixed to the support leg 22. Any other method may be used, and the floor panel 12 may be simply placed on the support leg.

  Moreover, although the example of the border panel 18 comprised by providing the aluminum sheet 44 as a conductive sheet on the surface of the particle board 46 was shown, as shown in the free access floor 60 of FIG. 7 and the free access floor 62 of FIG. In addition, any border panel in which a conductive sheet is provided on at least one of the upper surface and the lower surface and a side surface may be used (FIG. 7 shows a border panel 56 in which a conductive sheet 44 is provided on the upper surface and the side surface. For example, FIG. 8 shows an example of the border panel 58 in which the conductive sheet 44 is provided on the upper surface, the lower surface, and the side surface), or a conductive sheet attached to a wooden or resin board. Since the particle board is strong and easy to process, it is suitable as a base material for the border panel. The conductive sheet may be a sheet material having conductivity, and copper foil or the like may be used in addition to the aluminum sheet 44.

  In any case, the electromagnetic wave generated above or below the free access floor is reflected by the conductive sheet provided on the border panel and exhibits an electromagnetic wave shielding effect. When the conductive sheet is provided on the upper and lower surfaces of the border panel, a double electromagnetic shielding layer is formed, so that a high electromagnetic shielding effect can be exhibited.

  Moreover, although the example which block | closes the clearance gap between the floor panel 12 and the border panel 18 with the aluminum tape 50 was shown, it should just be block | closed with the conductive tape. For example, the gap between the floor panel 12 and the border panel 18 may be closed with zinc tape, tape with stainless steel mesh, or the like.

  Further, in order to reduce electromagnetic waves leaking from the gaps between the border panels 18, the border panels 18 are preferably arranged so that the gaps between the border panels 18 are as small as possible. If the size of the gap is about 1.5 mm or less, the capacitor effect by the aluminum sheet 44 provided on the side surface of the border panel 18 can be expected.

  Further, when it is not necessary to attach or detach the border panel 18, it is preferable that a plurality of border panels be arranged as shown in FIG.

  Moreover, although the example which fixed the border panel 18 to the receiving part 42 by screwing the wood screw 48 in the particle board 46 and the receiving part 42 was shown, what is necessary is just the method which can fix the border panel 18 to the support leg 26. Alternatively, the border panel 18 may be simply placed on the support leg.

In the first embodiment, has been described border panels 18 disposed in the border portion K _2, it is arranged in the region R ₁ around the border panels 14 and 16 and pillars 54 disposed in the border portion K ₁ The same configuration as the border panel 18 can be used for a panel arranged in various spaces where a floor panel cannot be laid, such as a panel. Thereby, it is possible to reduce the leakage of electromagnetic waves from the border portion K ₁ and region R ₁ and the like.

  Next, the free access floor 64 according to the second embodiment of the present invention will be described.

  In the second embodiment, a conductive material is inserted into the gap between the floor panel 12 and the border panel 18 of the first embodiment. Therefore, in the following description, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

  As shown in FIG. 9, a conductive material 66 is provided in the gap between the floor panel 12 and the border panel 18 of the free access floor 64.

  As shown in FIG. 10A, the conductive material 66 is obtained by covering the surface of an elastic body 68 having a wedge-shaped cross section with a conductive material 70. The conductive material 66 is covered with the floor panel 12 and the border panel 18. It is inserted in the gap. Further, as shown in FIG. 10B, the conductive material 66 is in contact with the hot dip galvanized steel plate 32 provided on the side surface of the floor panel 12 and the aluminum sheet 44 provided on the side surface of the border panel 18 at this time. Yes.

  Next, the operation and effect of the free access floor 64 according to the second embodiment of the present invention will be described.

  In the second embodiment, the same effect as in the first embodiment can be obtained.

  Further, as shown in FIG. 10B, electromagnetic waves leaking from the gap between the floor panel 12 and the border panel 18 can be reduced by closing the gap between the floor panel 12 and the border panel 18 with the conductive material 66. it can.

  Further, when the gap between the floor panel 12 and the border panel 18 is closed by the conductive material 66, the aluminum sheet 44 provided on the lower surface of the border panel 18, the aluminum sheet 44 provided on the side surface of the border panel 18, the conductive material 66, since the hot dip galvanized steel plate 32 provided on the side surface of the floor panel 12 and the hot dip galvanized steel plate 32 provided on the upper and lower surfaces of the floor panel 12 are connected to form a series of electromagnetic wave shielding layers. When electromagnetic waves are generated above or below 64, a high electromagnetic shielding effect can be exhibited.

  Also, the conductive material 66 can be easily attached and detached. Furthermore, the conductive material 66 once used can be used again.

  As the elastic body 68, a rubber material, a foam material, a sponge, a soft resin material, or the like can be used. As the conductive material 70, an aluminum foil, a copper foil, a stainless mesh, or the like can be used.

  Further, as in the free access floor 64 shown in FIGS. 11A and 11B, the conductive material 66 is formed by bundling the conductive wire 72 in a sponge shape, and this is formed between the floor panel 12 and the border panel 18. Even if it is inserted, the same operation and effect as the conductive material 66 of FIG. 10 can be obtained. As the wire 72, a stainless wire or the like can be used.

  Further, the conductive material 66 may be a conductive sealing material, and this sealing material may be filled in the gap between the floor panel 12 and the border panel 18. If the sealing material is used, the gap between the adjacent floor panel 12 and the border panel 18 can be reliably closed with the conductive material. As the sealing material, a conductive sealing material (sealing material mixed with metal fibers) or the like can be used.

  Next, a free access floor 10 according to a third embodiment of the present invention will be described.

  In the third embodiment, a gap between the border panels 18 of the first embodiment is closed with a conductive material. Therefore, in the following description, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

  As shown in FIG. 12, which is a BB side cross-sectional view of FIG. 1, an aluminum tape 50 as a conductive material extends from the upper surface of one border panel 18 to the upper surface of the other border panel 18 adjacent thereto. Pasted. That is, the gap G between the border panels 18 is closed by the aluminum tape 50 as a conductive material. At this time, the aluminum sheets 44 provided on the side surfaces of the adjacent border panels 18 are in contact with the aluminum tape 50.

  Next, operations and effects of the free access floor 10 according to the third embodiment of the present invention will be described.

  As shown in FIG. 12, even if the border panel 18 is laid with a gap G between adjacent border panels 18, the aluminum tape 50 that closes the gap G between the border panels 18 leaks from the gap G. Electromagnetic waves can be reduced. Therefore, the border panel 18 can be easily attached and detached.

  In the third embodiment, as in the case of the border panel 18 shown in FIG. 4 of the first embodiment, an example using a border panel in which an aluminum sheet 44 is attached to the lower and side surfaces of the particle board 46 is shown. It is sufficient if the conductive sheet is a border panel provided on at least one of the upper surface and the lower surface.

  Even if the gap G between the border panels 18 is closed by the conductive material 66 shown in FIGS. 10 and 11 instead of the aluminum tape 50, the same operation and effect as the aluminum tape 50 can be obtained.

  As described above, in the first to third embodiments, leakage of electromagnetic waves from the border portion can be reduced by an easy method.

  Further, by applying the first to third embodiments, an antistatic effect generated on the free access floor can be expected.

  In order to facilitate the attachment and detachment of the floor panel and the border panel, even when a space is provided around the floor panel and the border panel and these panels are arranged, the gap between these panels is set to the first. The electrical continuity between panels can be ensured by closing with the aluminum tape 50, the conductive material 66, or the conductive sealing material of the third to third embodiments.

  Therefore, a plurality of panels will form a wide area that is electrically integrated, spreading the charged current over the entire surface of the free access floor, facilitating spontaneous discharge, and preventing large local discharge. Can do.

  As a result, malfunctions of devices and signal cables installed on the free access floor can be prevented.

  Although the first to third embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and the first to third embodiments may be used in combination. Needless to say, the present invention can be implemented in various forms without departing from the gist of the invention.

It is a top view which shows the free access floor which concerns on the 1st Embodiment of this invention. It is an enlarged view of FIG. It is AA sectional side view of FIG. It is a sectional side view which shows the free access floor which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the free access floor which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the effect | action of the free access floor which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the free access floor which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the free access floor which concerns on the 1st Embodiment of this invention. It is a sectional side view which shows the free access floor which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the electrically conductive material of the free access floor which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the electrically conductive material of the free access floor which concerns on the 2nd Embodiment of this invention. It is a sectional side view which shows the free access floor which concerns on the 3rd Embodiment of this invention. It is a top view which shows the conventional free access floor. It is CC sectional view taken on the line of FIG. It is explanatory drawing which shows the conventional free access floor. It is an expanded sectional view which shows the fitting part of the conventional free access floor.

Explanation of symbols

10, 60, 62, 64 Free access floor 12 Floor panel 14, 16, 18, 56, 58 Border panel 20 Housing 32 Hot-dip galvanized steel sheet (conductive layer)
44 Aluminum sheet (conductive sheet)
50 Aluminum tape (conductive tape, conductive material)
66 Conductive material 68 Elastic body 70 Conductive material 72 Wire material F Crevice G Gap H Under-floor space K ₁ , K ₂ Border portion (space where the floor panel cannot be laid)
R ₁ region (space floor panel can not be laid)

Claims (6)

In a free access floor that forms an underfloor space with the frame floor surface by a plurality of floor panels laid above the frame floor surface,
A conductive layer provided on at least one surface and side surfaces of the upper and lower surfaces of the floor panel;
A border panel arranged in a space where the floor panel cannot be laid,
A conductive sheet provided on at least one surface and side surfaces of the upper and lower surfaces of the border panel;
A conductive material that contacts a conductive layer provided on a side surface of the floor panel and a conductive sheet provided on a side surface of the border panel, and closes a gap between the adjacent floor panel and the border panel;
A free access floor characterized by having.   The border panel includes a plurality of border panels, and includes a conductive material that contacts the conductive sheets provided on the side surfaces of the border panels adjacent to each other and closes a gap between the border panels. Free access floor.   The free access floor according to claim 1, wherein the conductive material is a conductive tape.   The free access floor according to claim 1, wherein the conductive material is a conductive sealing material.   The free access floor according to claim 1, wherein the conductive material is an elastic body covered with a conductive material.   The free access floor according to claim 1 or 2, wherein the conductive material is formed by bundling conductive wires in a sponge shape.

Images