JPH0913640A - Free access floor by groove constructing method - Google Patents

Abstract

PURPOSE: To prevent the falling of a floor board by fire by providing a support leg made of resin and having a core metal inserted to the part for supporting at least the floor board and a wiring groove lid. CONSTITUTION: This free access floor is formed of non-combustible floor boards 10 arranged to ensure a wiring groove with a fixed width vertically and horizontally continued between them; a metallic wiring groove lid 12 for covering the wiring groove; a metallic central wiring groove lid 14 for covering a central wiring groove forming the crossing part of the wiring grooves; and a support leg 16 for supporting them on a foundation floor surface. The support leg 16 is made of resin, considering the cushioning action for the floor board 10 to be placed thereon, and a metallic core metal 50 is inserted to the part for supporting at least the floor board 10 and the lid 12. The floor board 10 and the lid 12 are thus supported by the core metal 50 even if the support leg 16 is burnt down, and although the core metal 50 is not inserted to the part for supporting the lid 14, the lid 14 is received by the groove 12 present under it, even when the support leg 16 is burnt down, so that it never falls onto the foundation floor surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a free access floor laid in an OA room or the like, in which a wiring groove is secured on a foundation floor surface to lay a floor board and the wiring groove is covered with a wiring groove cover. It relates to a free access floor called a ditch construction method covered with.

[0002]

2. Description of the Related Art Since a floor space below a floor plate is not basically used as a wiring space in a groove construction free access floor, the floor can be made low and the height of the indoor space can be maximized. Therefore, in the case of reforming or the like, the groove construction method is widely used. Generally, a groove construction method free access floor has a floorboard, a wiring groove cover that covers the wiring grooves formed between the floorboards, a central wiring groove cover that covers the central wiring groove formed at the place where the wiring groove covers gather, and It is composed of support legs that support the floor surface (for example, the actual open flat 4-129).
249).

When constructing a groove construction method free access floor, the most important thing to keep in mind is that the floor board and the wiring groove lid do not drop due to an earthquake or the like. If the floorboard or the wiring groove cover falls, an emergency evacuation route cannot be secured, or expensive equipment installed on it will be damaged. Particularly, in the groove construction method, since wiring groove lids and the like are used in addition to the floor plate, extra care must be taken when dropping. In many cases, the support leg supports the floor plate and the wiring groove cover, and the floor plate supports the wiring groove cover (the above-mentioned prior examples also have this structure).

[0004]

One of the things that must be remembered when the floor plate or wiring groove lid falls is due to a fire. Since fires are caused by human causes, they are more frequent than those caused by earthquakes. In the conventional free access floor using the groove construction method, much attention is paid to the prevention of falling of floor boards due to this fire. This can be said also in the above-mentioned prior example, and the floor plate and the wiring groove lid are made of non-combustible metal material to deal with this, but no special consideration is given to the supporting legs. It seems that the supporting legs are made of resin, but the resin is burned out when exposed to a fire. Therefore, the floor board and the wiring groove lid supported thereby naturally fall onto the foundation floor surface.

In order to prevent this, the supporting leg is also made of a non-combustible metal material or the like. Since the supporting legs have a complicated shape such as having a step for individually supporting the floor plate and the wiring groove lid, if it is attempted to manufacture this with a metal material, die casting of aluminum or a steel plate, etc. This means press molding. However, in the former case, the material cost is high,
The latter cannot handle complicated shapes, and the processing cost is high.
After all, the cost is high. Further, the weight of the metal material is high, and the transportation cost and the storage cost are high, which also increases the cost.

The present invention solves such a problem by making all articles constituting the groove construction free arc cess floor nonflammable, and in this case also making them all metallic or the like. Instead, only the part that performs the essential function is made of a metal material and the rest is made of resin or the like to prevent falling due to a fire, and at the same time it is possible to reduce the cost.

[0007]

SUMMARY OF THE INVENTION Under the above problems, the present invention is arranged on the foundation floor surface so as to be separated from each other by a predetermined distance.
A non-combustible floorboard with this spacing as continuous wiring grooves in the vertical and horizontal directions, and a metal wiring groove lid with a low step formed at the end that covers the area between the floorboard side surfaces of the wiring groove, and the intersection of the wiring grooves. The central wiring groove lid made of metal that covers the substantially square central wiring groove that overlaps with a gap above the lower step portion of the wiring groove lid corresponds to each corner of the central wiring groove lid and each corner. The corners of each floor board and both sides of each wiring groove lid on the end side are made of resin, and the foundation floor surface is formed by supporting legs formed by inserting a core metal into at least a portion supporting the floor board and the wiring groove lid. To provide a groove construction free access floor characterized by being supported above.

[0008]

By the above means, even if the resin support legs are burnt out, the core supporting the floor plate and the wiring groove cover contains a non-combustible core metal. Support the floor plate and wiring groove lid with gold. The core metal is not inserted in the part that supports the central wiring groove lid, but if the supporting leg burns down, the metal wiring groove lid that exists below it will take charge of it. Do not fall until.
The central wiring groove lid is directly supported by the resin part of the support leg,
There is a gap between the wiring groove cover and
This is because direct contact is avoided and no walking noise is generated.
On the other hand, according to the above means, most of the supporting legs are made of resin, which enables cost reduction at the same time.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing a laid state of a floorboard showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is B of FIG.
FIG. 13B is a sectional view of the floor construction method according to the present invention, which is a floor board 10 arranged so as to secure a wiring groove having a constant width continuous vertically and horizontally, and a wiring groove lid covering the wiring groove. 12, a central wiring groove lid 14 that covers the central wiring groove that is the intersection of the wiring grooves, and support legs 16 that support these on the foundation floor surface.

The floor plate 10 has a quadrangular shape in plan view. However, a quadrangle alone may be used, or a combination of triangles and the like may be combined into a quadrangle. In order to absorb the unevenness of the foundation floor surface, it is better to combine the triangular ones, and for the quadrangular one, it is desirable to add a groove or the like in the diagonal to make it flexible. Next, the floor board 10 is made of a metal or an inorganic material so as to be incombustible.
This is to prevent burning even if a fire occurs.
The upper plate 18 and the lower plate 20 made of metal are caulked to have a large thickness.

The wiring groove lid 12 is the floor plate 1 of the wiring groove described above.
The metal plate which is an incombustible material is bent to form a U-shaped cross section including an upper surface portion 22 and a side surface portion 24. In this case, the lower end of the side surface portion 24 is bent inward to increase the strength and prevent the wiring from being damaged. Further, a bead or the like 28 for appropriately increasing the strength is provided on the upper surface portion 22. Further, at the end, the low step portion 2
6 is provided with an appropriate width. The meaning of the lower step portion 26 will be described later.

The central wiring groove lid 14 covers a substantially square space forming the intersection of the wiring grooves (the portion other than the intersection is covered by the wiring groove lid 12) and is made of a noncombustible metal material. It is a flat plate body.

The support legs 16 are located below the central wiring groove cover 14, and are located at the corners of the central wiring groove cover 14, the corners of the floor plate 10 corresponding to the corners, and the ends of the wiring groove covers 12. Both side parts are supported on the foundation floor. Since it is necessary to pass the wiring even in the space below the central wiring groove lid 14, that is, inside the support leg 16, the support leg 16 must be capable of this.

Therefore, the support leg 16 in this example has one corner of the central wiring groove lid 14 and the floor plate 1 corresponding thereto.
Four support leg portions 30 that support one corner portion of 0 and one side portion on the end portion side of the wiring groove lid 12 as one unit are connected. That is, the support leg 30 has a substantially triangular shape in a plan view, and the floor board seat 32 for receiving the bottom surface of the corner of the floor board 10 is provided in the central portion and the central wiring lid seat 36 for receiving the central wiring lid 14 is provided at the top. Wiring groove lid seats 34 for receiving the wiring groove lids 12 are formed on the sides sandwiching, respectively, and these are respectively received. In this example, the floor plate seat 32
And the wiring groove lid seat 34 have the same height. As described above, since the central wiring cover seat 36 is a resin member having good contact, it has an effect of preventing the wiring (cable) from being damaged.
Further, the support leg portion 30 may be appropriately cut and used in correspondence with a border portion, a floor duct, or the like.

In this case, the floor plate seat 32 is fitted with a fitting projection 38.
Is formed in advance, and a fitting hole 40 formed on the bottom surface of the floor plate 10 is fitted into the fitting protrusion 38 to regulate the position (FIG. 2). Further, a standing wall 39 standing upright from the floor plate seat 32 is provided on the top side at a right angle to the central perpendicular, and the side surface of the corner portion (bottom plate 20) of the floor plate 10 is applied to this to regulate the position also here. (Figure 3).

A regulation wall 42 is erected outside the wiring groove lid seat 34, and the side surface portion 24 of the wiring groove lid 12 is abutted against the regulation wall 42 to prevent the wiring groove lid 12 from being displaced. (Figure 2). The restriction wall 42 also serves as a wiring guard. Further, a fitting hole 44 is formed in the central wiring lid seat 36, and an engaging projection 46 formed on the central wiring groove lid 14 is engaged with the fitting hole 44 to shift the central wiring groove lid 14. Preventing (Fig. 3)

The four support legs 30 surrounding the central wiring groove lid 14 are connected to each other by connecting bands 48 in order to determine the arrangement position of the floor board 10 and facilitate the construction. These connecting bands 48 are made of a flexible thin material so as to follow the unevenness of the foundation floor. In this example, there are two types of bands, that is, a band 48a that crosses the wiring groove and a band 48b that crosses the central wiring groove in an X shape. Of these, the belt 48b is
When the wiring is pulled, it has an effect of preventing the wiring from getting under the support leg portion 30.

The support legs 16 are made of resin in consideration of workability, weight and the like, and also in consideration of the cushioning action of the floor plate 10 and the like placed thereon. However, since the resin-made one is flammable, the metal cored bar 50 is inserted into at least the portion supporting the floor plate 10 and the wiring groove lid 12 (FIG. 1). In this case, the wall thickness of the floor plate seat 32 and the like on the upper part of the cored bar 50 is made thin to minimize the fall of the floor plate 10 and the wiring groove lid 12 when burned out (FIG. 2).
The same applies to the central wiring lid 14, which will be described later.

FIG. 4 is a rear view of the support leg portion 30 with the core metal 50 inserted, FIG. 5 is a sectional view taken along line CC of FIG. 4, and FIG. 6 is a partial sectional side view of the core metal 50. A long octagonal pocket 52 is formed on the back surface of the support leg portion 30, and a box-shaped core bar 50 having a closed ceiling portion of the same shape is inserted therein. In this case, the engagement protrusion 54 is formed in the pocket 52,
It is desirable to engage the core metal 50 with it so that it cannot be easily disengaged (FIG. 5). This engaging projection 54 portion serves as a peep window, which also has the effect of confirming the presence of the cored bar 50.

The dimensions of the central wiring groove lid 14 are as follows.
Is slightly larger than the size of the substantially square central wiring groove formed at the gathering point. Therefore, the central wiring groove lid 14 has a structure in which it partially overlaps with the low step portion 26 of the wiring groove lid 12, but at this time, the step of the low step portion 26 has a gap secured between them. Is set to. This is to prevent the walking sound and rattling that may occur when they are brought into contact with each other. Although it is conceivable to insert a cushioning material here, since the cost increases due to an increase in the number of parts, such a method is not adopted in the present invention. With the above configuration, even if the support leg portion 30 is burnt out, the central wiring groove lid 14 simply drops onto the low step portion 26 of the wiring groove lid 12.

In addition, notches 58 and 60 are formed on a part of the sides of the floor plate 10 and the wiring groove lid 12 to form a slot-shaped wiring outlet 56, which are joined together, and the supporting leg portion 30. The blocking member 62 provided in the above is inserted into this to block it. This is to prevent the wiring outlet 56 from becoming a hole. The plugging material 62 can be easily cut off, and the wiring outlet 56 is formed if necessary. still,
The outer peripheries of the notches 58 and 60 of the floor plate 10 and the wiring groove lid 12 that form the wiring outlet 56 are bent inward to prevent damage to the wiring. Also, the side wall of this portion is made shorter than the outer portion in order to facilitate the wiring extraction.

When the size of the floorboard 10 becomes large to some extent,
Occasionally, it may be impossible to close the wiring groove on the side of the floor plate 10 with the single wiring groove lid 12 because of looseness. In this case, two or more wiring groove lids 12 are abutted, and the abutting points are supported by the intermediate support legs 64. FIG. 7 is a plan view showing a state in which two wiring groove lids 12 are joined together by using the intermediate support legs 64, and FIG. 8 is a cross-sectional view taken along the line DD in FIG. The groove lid 12 is supported at the same time.

The intermediate support leg 64 has a substantially H-shaped cross section having a horizontal seat 70 between the inner wall 66 and the outer wall 68, and two core bars 72 connect the two. A partition wall 74 connecting the inner wall 66 and the outer wall 68 is also formed in the middle of the seat 70, and the wiring groove lid 12 is positioned vertically and horizontally by the inner wall 66 and the partition wall 74.
On top of. The side surface (bottom plate 20) of the floor plate 10 is applied to the outer wall 68 to ensure stability. At this time, the outer wall 6
The upper and outer ends of 8 are rounded to facilitate insertion of the floorboard 10 (Fig. 8).

The intermediate support leg 64 is also made of a resin material or the like in consideration of workability and the like, but in that case, the core metal 72 is a non-combustible material. The wall thickness of the seat 66 above the core metal 72 is also thin,
It is the same as the above-mentioned support leg portion 30 and the like that the amount of fall of the wiring groove lid 12 should be minimized even if the intermediate support leg 64 is burnt out.

[0025]

As described above, according to the present invention, since the floor board, the wiring groove lid and the central wiring groove lid are made of non-combustible material, they will not be burned even if a fire occurs. On the other hand, the supporting legs that support them are made of flammable resin material, and at least the core metal that receives the floor plate and the wiring groove cover with a minimum drop is inserted in this, and the central wiring groove is also inserted. The lid is partially overlapped on the wiring groove lid, so even if the support leg burns down due to a fire, these will drop only slightly, the equipment above it will be safe, and an evacuation route will be secured. it can.

On the other hand, since a gap is secured between the overlapped central wiring groove lid and the wiring groove lid, no walking noise or the like is produced. Further, since the floor board can be laid without placing the central wiring groove lid and the wiring groove lid separately, it is possible to perform the laying work and the wiring work at the same time.

[Brief description of the drawings]

FIG. 1 is a plan view of a laid state of a floorboard showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3 is a sectional view taken along line BB of FIG.

FIG. 4 is a back view of a supporting leg portion showing an embodiment of the present invention.

5 is an enlarged sectional view taken along line CC of FIG.

FIG. 6 is a partial cross-sectional side view of a cored bar showing an embodiment of the present invention.

FIG. 7 is a plan view of an intermediate support leg in use according to an embodiment of the present invention.

8 is a cross-sectional view taken along line DD of FIG.

[Explanation of symbols]

 10 Floor Board 12 Wiring Groove Lid 14 Central Wiring Groove Lid 16 Support Leg 26 Lower Step 30 Support Leg 48 Connection Band 50 Core Metal 56 Wiring Outlet 58 Notch 60 Notch 62 Closing Material 64 Intermediate Support Leg 72 Core Metal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Mitsuru Fukushima 500 Okayama Honsha Co., Ltd., Okayama 500, Akahama, Soja City, Okayama Prefecture (72) Okayama Honsha Okayama Honsha Co., Ltd. (72) Otomo Kawamoto, Okayama Main Company, Ogawa

Claims (4)

[Claims] 1. A non-combustible floor board, which is a wiring groove that is continuous in the vertical and horizontal directions by arranging them on the foundation floor surface with a certain distance between each other, and covers the portion between the floor board side surfaces of the wiring groove. A central wiring made of metal, which covers a metal wiring groove lid formed with a low step and a substantially square central wiring groove that is an intersection of the wiring grooves and which overlaps with a gap above the low step portion of the wiring groove lid. The groove cover is made of resin at the corners of the central wiring groove cover, the corners of each floor plate corresponding to each corner, and both end sides of each wiring groove cover made of resin. A groove construction free access floor characterized in that it is supported on the foundation floor by support legs formed by inserting a core metal into the portion supporting the lid. 2. The support leg is composed of four corners of the central wiring groove lid, four corners of the floor board corresponding thereto and one end side of the wiring groove lid at the same time. The groove construction free access floor according to claim 1, wherein the support legs are connected by a connecting belt. 3. The wiring groove lid on the side of the floor plate is composed of two wiring groove lids that are abutted without forming a low step portion, and the abutting point is supported by an intermediate support leg made of resin with a cored bar inserted. The groove construction free access floor according to any one of claims 1 to 2. 4. The floor plate and the wiring groove lid are each formed with two notches each serving as an elongated hole-shaped wire outlet, which is formed on each side portion, and a supporting member is provided with a blocking member which enters the wire outlet and closes it. The grooved construction method free access floor according to any one of claims 1 to 3, which is provided so as to be cut off.