JPH07269074A - Double-floor structure - Google Patents

Abstract

PURPOSE:To make it possible to adjust unevenness by forming a floor surface with a joint material having a horizontal top surface which buries and levels an offset portion of a floor panel which has formed the offset portion flush with the floor panel. CONSTITUTION:A double floor has floor panel materials 1 and joint materials 2a and 2b which interconnect the floor panel materials. The floor panel materials 1 forming an offset portion around the top area are supported with elastic materials 3 and support less 4. Each Joint material comprises a top flat surface area 21 which is flush with the floor panels 1 by burying the offset portions 11 of the floor panel materials, for example, and a bottom flat surface 22 which comes in contact with this rear surface 15 and a middle section 23 which is narrower than the top flat surface and comes in contact with the end face of the floor panels 1, thereby forming an I-shaped cross section. In this section, each joint material 21 and the bottom flat surface area 22 connect the plywood-made top flat surface area 21 and the bottom flat surface area 22 on both surfaces of a particle-made intermediate section 23 with wooden screws 24 so that the thickness of the top flat surface area and the intermediate section 23 may be made flush with the floor panels 1. It is, therefore, possible to constitute a floor surface which joints the floor panels 1 and each joint without any clearance by way of the joint materials 2a and 2b respectively.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double floor structure. More specifically, the present invention relates to a new double floor structure which is useful as a soundproof floor, which is easy to construct, has a high degree of freedom in wiring and piping under the floor, and is easy to maintain.

2. Description of the Related Art Conventionally, wooden floors have been adopted also in apartments and the like made of concrete structures, but in the case of this wooden floor, floor impact noise that affects the downstairs becomes a problem. Sound-proof floors have been proposed and are being put to practical use in order to reduce the impact noise generated by people walking, falling objects, and jumping or running around by children.
For example, as shown in FIG. 7, a cushioning material (a) such as glass wool or rock wool is placed on a floor structure (a) such as concrete, and a surface material (c) such as a wood material is placed on the surface thereof.
A floating floor structure loaded with is known. However, in the case of this structure, in order to secure a high weight as the floor surface due to the surface material (c), the construction is complicated because it is inevitably multi-layered. Moreover, in this structure, so-called wiring and piping under the floor are required. There was a drawback that it was difficult to secure space.
Moreover, there is a limit to the effect of reducing the impact noise. Then, as a solution to such a drawback, for example, a double floor structure shown in FIG. 8 has been proposed. As shown in the partial cross-section in FIG. 9, this structure generally has a floor made of, for example, a particle board (F) and a stationary bonding plate (K) thereon, made of a vibration-proof rubber or the like. It is supported by elastic material (K) and support legs (K), a wood-based finishing material (K) is arranged on the floor surface, and a sound absorbing material (SA) such as glass wool is arranged on the lower floor. It is placed, and piping and wiring are applied. In this structure, as is clear from FIG. 8, usually, first, the panel made of particle board (F) is supported by the elastic material (K) and the supporting legs (K) so that the space between them is increased. 30-80 gap
Open about mm and line up. Then, for example, FIG.
As shown in, support bolts (ta) and panel receivers (h)
In a support leg structure consisting of
Using the holes (s) on the surface of the particle board (f), rotate it from above with a screwdriver etc. to adjust the height,
After adjusting the unevenness, the stationary bonding plywood (K) is placed on the particle boat (F), and the finishing material (K) is further arranged thereon. Such a double floor structure realizes a wooden floor with good soundproofing performance, and has an advantage that the lower floor can be effectively used as a space for piping and wiring.

However, in the case of the conventional double floor structure as described above, normally, as described above, the panel of particle board (f) is arranged with a gap of about 30 to 80 mm. However, at this stage, the panel is not fixed, and since the stationary plywood (ki) and the finishing material (ko) are pasted on this, the panel arrangement of the particle board (f) is not always stable, In addition, once the stationary plywood (ki) is pasted, the holes (s) of the particle board (f) are blocked, so there is a problem that the level (uneven) cannot be adjusted. For this reason, it was not always easy to carry out construction while ensuring a horizontal level as the floor surface. Moreover, the sound absorbing material (SA) was directly placed on the floor structure (A) as a sheet or a block-shaped body, but since it is not fixed, the location may be changed. Depending on the arrangement of piping and wiring, the floor-mounted sound-absorbing material (SA) was a hindrance, and it was necessary to open the sound-absorbing material (SA) with a gap or cut it in the middle. As described above, the conventional structure has a problem in the stability and workability of the underfloor arrangement of the sound absorbing material and the pipe. Furthermore, in the conventional double-floor structure, there is no means for inspecting the underfloor piping and wiring connection parts, connection parts, etc. It was necessary to remove the stationary laminated plywood (ki), and it was extremely difficult to perform underfloor maintenance. Therefore, the present invention eliminates the drawbacks of the conventional double floor structure as described above, is easy to install, has a large degree of freedom under the floor wiring and piping, and is easy to maintain, useful as a soundproof floor. , Is intended to provide a new double floor structure.

Means for Solving the Problems The present invention is to solve the above-mentioned problems by providing a floor structure having an elastic body arranged on the floor structure and a floor surface supported by support legs, in which the floor surface is Has a floor panel material and a joint material that connects the floor panel material to each other, and the floor panel material having a stepped portion formed around the upper surface is supported by the support legs. A joint material including an upper flat surface portion that is flush with the floor panel material, a lower flat surface portion that contacts the back surface of the floor panel material, and an intermediate portion that is narrower in width than the upper and lower flat surface portions and that contacts the end surface of the floor panel material. A double floor structure is provided which is characterized by being connected by. The present invention also provides a double floor structure in which a sound absorbing material is arranged and fixed by a holding net and supporting legs on the back surface of the floor panel, or a double floor structure having an inspection port.

In the present invention, as described above, since the floor surface is formed by the floor panel material and the joint material having the stepped portion, the particle boards supported by the supporting legs are arranged side by side with a gap as in the conventional case. , Compared to when placed
The floor layout is decided and stable. In addition, since a floor panel material with a step formed in advance can be configured with particle board and plywood, the work of pasting the fixed plywood is not required as in the past, and moreover, the holes made in the floor panel make it difficult Can be adjusted (level adjustment).
Further, since the floor panel materials are connected to each other by the joint material, the rigidity of the floor panel materials is increased, and conventionally, five supporting legs, that is, a square portion and a central portion, are conventionally required. There are construction and cost advantages that only four parts can support. By modularizing the floor panel material and joint material, the members are unified and workability is further improved. When fixing the sound absorbing material to the back surface of such a floor panel material with a holding net, compared to the case where the sound absorbing material is directly placed on the floor structure as in the conventional case,
The sound absorbing material does not move during construction, etc., and the degree of freedom of piping and wiring under the floor becomes great.
In addition, the arrangement of the inspection port makes it extremely easy to maintain the piping and wiring under the floor. Examples will be shown below to describe the double floor structure of the present invention in more detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 of the accompanying drawings illustrates a floor panel material (1) for a double floor structure of the present invention, and FIG. 2 is a plan layout view of the structure. 3 is a sectional view of a main part of the structure. For example,
As illustrated in FIG. 3 and FIG. 3, the double floor structure of the present invention has a floor panel material (1) and joint materials (2a) and (2b) for connecting the floor panel material (1) to each other, and a stepped portion around the upper surface portion. (11) The floor panel material (1) thus formed is supported by the elastic material (3) such as a vibration-proof rubber and the supporting legs (4).
The floor panel material (1) at this time is, for example, 840 × 84.
Particle board (0 mm, thickness 20 mm) (1
A plywood (13) having a thickness of 760 x 760 mm and a thickness of 12 mm is stuck on the top of 2) with an adhesive, and a hole (14) is formed in the square portion.
Can be opened. Joint material (2
As for a) and (2b), two modules having different lengths can be unified as illustrated in FIG. 2, and this module and the floor panel material (1) can form a square module. Unification of members, cost reduction, and ease of construction will be realized. By the way, regarding the joint materials (2a) and (2b), FIG.
As also illustrated above, the stepped portion (1) of the floor panel material (1)
An upper flat surface portion (21) that is flush with the floor panel material (1) by burying 1), a lower flat surface portion (22) contacting the back surface (15) of the floor panel material (1), and these upper and lower flat surface portions. The width may be narrower than that of the floor panel material (1) and the intermediate portion (23) that abuts the end surface of the floor panel material (1) may have an I-shaped cross section. In this case, the joint materials (2a) and (2b) have, for example, an upper flat surface portion (21) and a lower flat surface portion (22) made of plywood having a width of 140 mm on both surfaces of an intermediate portion (23) made of a particle board having a width of 60 mm. , Wood screws (24)
And the upper flat surface portion (21) and the intermediate portion (23) have substantially the same thickness as the floor panel material (1). With the joint materials (2a) and (2b), the floor panel material (1) and the joint materials (2a) and (2b) are joined together without a gap, and the floor surface is configured. Unlike the conventional case, it is not necessary to attach a stationary laminating board to this flushed floor surface, and it is sufficient to dispose a finishing material. For this reason, it is possible to save the trouble of installation and pasting. And in such a structure, the floor panel material (1) is provided with holes (14) in the support portion by the support legs (4), and the support bolts (41) of the support legs (4) are In the support structure with the panel receiver (42), the rotation of the support bolt (41) from the hole (14) enables the unsteady adjustment (level adjustment). In the conventional structure, it is impossible to adjust the unsteadiness of the support legs after the fixed plywood is pasted, but in the case of the present invention, the unsteady adjustment can be performed in the state where the plywood is provided. Since the floor panel materials (1) are connected to each other by the joint materials (2a) and (2b), the rigidity of the floor panel (1) is greatly increased and the floor panel materials (1) are stably arranged on the floor structure. At the same time, conventionally, it is conventionally necessary to dispose five support legs in the square portion and the central portion, but in the present invention, the disposition of four support legs (4) in the square portion is sufficient. Therefore, it is possible to save the work and reduce the cost. When a low-rigidity member such as a carpet or a cushion floor is arranged on the floor panel material (1), a lid having the same diameter is fitted so as to cover the hole (14) of the floor panel (1). You can also make it flush. Of course, the standardization of the joint materials (2a) and (2b) is not limited to the above example, but can be appropriately performed. FIG. 4 is an exploded perspective view showing an example in which the sound absorbing material (5) is fixed to the back surface of the floor panel material (1). In this example, a sound absorbing material (5) made of glass wool, rock rule or the like is attached to a holding net (6).
And support legs (4) for disposing and fixing on the back surface of the floor panel material (1). At this time, the height (between the floor structure surface and the holding net (6)) can be maintained at any height by interposing the spring (7) or the tube (8) in the support leg (4). Becomes Since the sound absorbing material (5) is not directly placed on the floor structure by the wiring of the sound absorbing material (5) as in the conventional case, there is no inconvenience that the sound absorbing material (5) moves during construction or the like. Moreover, since the holding net (6) can be kept at a constant height by the spring (7) and the tube (8), the degree of freedom of piping and wiring on the floor structure surface becomes extremely large, and vertical and horizontal arbitrary piping and Wiring is possible. FIG. 5 is an exploded perspective view showing an example in which an inspection port is provided in a part of the floor panel material (10) on the floor surface. Further, FIG. 6 is a cross-sectional view of the main part of the double floor structure provided with this inspection port. That is, for example, as illustrated in FIG. 5 and FIG. 6, the floor panel material (1) is provided with an inspection opening (17) having a stepped portion (16) formed in the inner peripheral portion thereof. 17) A reinforcing support frame (9) is arranged and fixed by supporting legs (4) on the back surface of the surrounding floor panel material (10). The inspection port (17) is provided with a lid member (100) whose upper surface is flush with the floor panel material (10). Since the rigidity of the floor panel material (10) is weakened by the opening of the inspection port (17), a reinforcing support frame (9) that supports the periphery of the lid (100) portion is arranged to increase the rigidity. The reinforcing support frame (9) can be easily assembled by being fixed to the floor panel material (10) with fixing screws (101) and (102) as illustrated in FIG. By disposing the above inspection port, maintenance of piping and wiring under the floor becomes extremely easy. In the case of the conventional structure, it could not be inspected unless the stationary plywood was peeled off. Of course, the double floor structure of the present invention is not limited to the above examples. It should be pointed out that various aspects of the detailed structure are possible.

As described in detail above, according to the present invention, in an apartment house or the like, the construction is easy and the piping under the floor,
A double floor structure having a large degree of freedom of wiring, easy maintenance, and useful as a soundproof floor is realized.

[Brief description of drawings]

FIG. 1 is a plan view and a front view showing a floor panel material for a floor structure of the present invention.

FIG. 2 is a plan view illustrating the floor structure of the present invention.

FIG. 3 is a cross-sectional view of main parts corresponding to FIG.

FIG. 4 is an exploded perspective view illustrating a floor structure of the present invention in which a sound absorbing material is fixed.

FIG. 5 is an exploded perspective view illustrating a floor structure of the present invention having an inspection port.

FIG. 6 is a cross-sectional view of main parts corresponding to FIG.

FIG. 7 is a sectional view showing a conventional soundproof floor.

FIG. 8 is a perspective view illustrating a conventional soundproof floor having a double floor structure.

9 is a cross-sectional view of a main part corresponding to FIG.

FIG. 10 is a cross-sectional view of an essential part showing a support structure.

[Explanation of symbols]

 1 Floor panel material 11 Step portion 12 Particle board 13 Plywood 14 Hole 15 Back surface 16 Step portion 17 Inspection port 2a, 2b Joint material 21 Upper flat surface portion 22 Lower flat surface portion 23 Intermediate portion 24 Wood screw 3 Elastic material 4 Support leg 41 Support bolt 42 Panel support 5 Sound absorbing material 6 Holding net 7 Spring 8 Tube 9 Reinforcement support frame 10 Floor panel material 100 Lids 101, 102 Fixing screws

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[Procedure amendment]

[Submission date] February 15, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the invention Double floor structure

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double floor structure. More specifically, the present invention relates to a new double floor structure which is useful as a soundproof floor, which is easy to construct, has a high degree of freedom in wiring and piping under the floor, and is easy to maintain.

[0002]

2. Description of the Related Art Conventionally, wooden floors have been adopted in apartments and the like made of concrete structures, but in the case of this wooden floor, floor impact noise that affects the downstairs becomes a problem. Sound-proof floors have been proposed and are being put to practical use in order to reduce the impact noise generated by people walking, falling objects, and jumping or running around by children.

For example, as shown in FIG. 7, a cushioning material (a) such as glass wool or rock wool is placed on a floor structure (a) such as concrete, and a surface material (such as wood material) C) A floating floor structure is known. However, in the case of this structure, in order to secure a high weight as the floor surface due to the surface material (c), the construction is complicated because it is inevitably multi-layered. Moreover, in this structure, wiring and piping under the floor are called. There was a drawback that it was difficult to secure space. Moreover, there is a limit to the effect of reducing the impact noise.

Then, as a solution to such a drawback, for example, a double floor structure shown in FIG. 8 has been proposed.
This structure, in the first stage, as also shown a partial cross section in FIG. 9, for example, particle board (F) and discard thereon
The floor surface consisting of the laminated plywood (ki) is supported by the elastic material (h) made of anti-vibration rubber etc. and the support legs (ke), and the wood-based finishing material (ko) is placed on the floor surface. The sound absorbing material (sa) such as glass wool is placed under the floor, and piping (si) and wiring are provided.

In this structure, usually, as is clear from FIG. 8, first, the panel made of particle board (F) is supported by the elastic member (K) and the supporting leg (K) so that they are mutually supported. A gap of 30-80
Open about mm and line up. Then, for example, FIG.
As shown in, support bolts (ta) and panel receivers (h)
In a support leg structure consisting of
Using the holes (s) on the surface of the particle board (f), rotate it from above with a screwdriver etc. to adjust the height,
After adjusting the unevenness, the discarding plywood (K) is placed on the particle boat (F), and the finishing material (K) is further arranged thereon.

Such a double-floor structure realizes a wooden floor having good soundproofing performance, and has the advantage that the lower floor can be effectively used as a space for piping and wiring.

[0007]

However, in the case of the conventional double floor structure as described above, normally, as described above, the panel of particle board (f) is arranged with a gap of about 30 to 80 mm. However, at this stage, the panel is not fixed, and the throwing plywood (ki) and the finishing material (ko) are pasted on this, so the panel arrangement of the particle board (f) is not always stable, Also once
When discarded upholstered plywood (g) the results in Tsu Zhang order would block the hole (scan) of particle board (mosquito), there was level problem (not land) can not be adjusted.

Therefore, it has not always been easy to carry out the construction while ensuring a horizontal level as the floor surface. Moreover, the sound absorbing material (SA) was directly placed on the floor structure (A) as a sheet or a block-shaped body, but since it is not fixed, the location may be changed. Depending on the arrangement of piping and wiring, the floor-mounted sound-absorbing material (SA) was a hindrance, and it was necessary to open the sound-absorbing material (SA) with a gap or cut it in the middle.

As described above, in the conventional structure, there is a problem in the stability and workability of the floor board arrangement such as the sound absorbing material and the piping. Furthermore, in the conventional double-floor structure, there is no means for inspecting the underfloor piping and wiring connection parts, connection parts, etc.
It was necessary to peel off the finishing material (K) and the discarded plywood (K), and it was extremely difficult to perform underfloor maintenance.

Therefore, the present invention eliminates the above-mentioned drawbacks of the conventional double floor structure, is easy to construct, has a high degree of freedom of wiring and piping under the floor, and is easy to maintain. The purpose is to provide a new double floor structure that is useful as

[0011]

In order to solve the above problems, the present invention provides a floor structure having an elastic body arranged on a floor structure and a floor surface supported by supporting legs, wherein the floor surface is A floor panel material having a floor panel material and a joint material for connecting the floor panel material to each other and having a stepped portion formed around the upper surface is supported by the support legs, and the floor panel material is filled with the stepped portion to form a floor. By a joint material consisting of an upper flat surface part that is flush with the panel material, a lower flat surface part that contacts the back surface of the floor panel material, and an intermediate part that is narrower than these upper and lower flat surface parts and that contacts the floor panel material end surface. A double floor structure characterized by being connected is provided.

The present invention also provides a double floor structure in which a sound absorbing material is arranged and fixed by a holding net and supporting legs on the back surface of the floor panel, and a double floor structure having an inspection port. .

[0013]

In the present invention, as described above, since the floor surface is formed by the floor panel material and the joint material having the stepped portion, the particle boards supported by the supporting legs are arranged side by side with a gap as in the conventional case. , Compared to when placed
Placement of the floor is stable Te because poles. In addition, since it is possible to construct a floor panel material in which a step is formed in advance by particle board and plywood, it is possible to dispose of a throw-on plywood as in the past.
Work of Zhang Ri with is not necessary, moreover, from the holes drilled in the floor panel, uneven surface adjustment (level adjustment) is possible.

[0014] Then for each other of the floor panels are joined by a joint member, the rigidity of the floor panel member is increased, conventionally, typically, the support leg is a required five and four corners and the central portion and it will be on the construction that can be supported by four only four corners, the cost benefits as well obtained.
By modularizing the floor panel material and the joint material, the members are unified and the workability is further improved.

When the sound absorbing material is fixed to the back surface of such a floor panel material with a holding net, the sound absorbing material is more likely to be attached during construction than when the sound absorbing material is directly placed on the floor structure as in the conventional case. It does not move, and the freedom of piping and wiring under the floor is great. In addition, the arrangement of the inspection port makes it extremely easy to maintain the piping and wiring under the floor.

Examples will be shown below to describe the double floor structure of the present invention in more detail.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 of the accompanying drawings illustrates a floor panel material (1) for a double floor structure of the present invention, and FIG. 2 is a plan layout view of the structure. 3 is a sectional view of a main part of the structure. For example,
As illustrated in FIG. 3 and FIG. 3, the double floor structure of the present invention has a floor panel material (1) and joint materials (2a) and (2b) for connecting the floor panel material (1) to each other, and a stepped portion around the upper surface portion. (11) The floor panel material (1) thus formed is supported by the elastic material (3) such as a vibration-proof rubber and the supporting legs (4).

The floor panel material (1) at this time is, for example,
On a particle board (12) of 840 x 840 mm and a thickness of about 20 mm, 760 x 760 mm and a thickness of 12
mm plywood (13) laminated with an adhesive, it can be assumed that a hole (14) at its four corners. The joint materials (2a) and (2b) can be unified into two modules having different lengths as illustrated in FIG. 2, and this module and the floor panel material (1) form a square module. You can Unification of parts,
Cost reduction and ease of construction will be realized.

Incidentally, the joint material (2a) (2b)
As shown in FIG. 3, an upper flat surface portion (21) that fills the stepped portion (11) of the floor panel material (1) and is flush with the floor panel material (1), and a floor panel material ( 1) a lower flat surface portion (22) contacting the back surface (15) and an intermediate portion (23) narrower in width than the upper and lower flat surface portions and contacting the end surface of the floor panel material (1). It can be of a type.

In this case, the joint material (2a) (2b)
Is, for example, an upper plane portion (21) and a lower plane portion (22) made of plywood having a width of 140 mm are joined to both surfaces of an intermediate portion (23) made of a particle board having a width of 60 mm with wood screws (24), and Flat part (21) and intermediate part (23)
The thicknesses of and are approximately the same as the floor panel material (1). With this joint material (2a) (2b), the floor panel material (1) and the joint material (2a) (2
The joining with b) is realized and the floor surface is constructed.

[0021] The floor surface flush with, as in the prior art, it is not necessary to put the discarded clad plywood Zhang, it is only necessary to dispose the finish. Therefore, it is possible to save the trouble of throwing it away . Further, in such a structure, the floor panel material (1) has holes (14) in the support portion by the support legs (4).
The support bolt (41) of the support leg (4),
In the support structure with the panel receiver (42), the rotation of the support bolt (41) from the hole (14) enables the unsteady adjustment (level adjustment).

[0022] In the conventional structure, after carrying thereon an abandoned clad plywood Zhang <br/>, but could not uneven surface adjustment in the support leg, in the case of this invention, in a state in which is disposed a plywood not Land adjustment is possible. Since the floor panel materials (1) are connected to each other by the joint materials (2a) and (2b), the rigidity of the floor panel (1) is greatly increased and the floor panel materials (1) are stably arranged on the floor structure. together, usually, conventionally, it was necessary five support legs arranged in a four-corner portion and the central portion, in this invention, it is sufficient in the arrangement of four supporting legs of the four corners (4) Become. Therefore, it is possible to save the work and reduce the cost.

When a low-rigidity member such as a carpet or a cushion floor is arranged on the floor panel material (1), the hole (14) of the floor panel (1) should be closed.
It is also possible to fit a lid of the same diameter to make it flush. Of course, the standardization of the joint materials (2a) and (2b) is not limited to the above example, but can be appropriately performed.

FIG. 4 is an exploded perspective view showing an example in which the sound absorbing material (5) is fixed to the back surface of the floor panel material (1). In this example, a sound absorbing material (5) made of glass wool, rock rule or the like is arranged and fixed to the back surface of the floor panel material (1) by a holding net (6) and supporting legs (4). At this time, the height (between the floor structure surface and the holding net (6)) can be maintained at any height by interposing the spring (7) or the tube (8) in the support leg (4). Becomes

[0025] by wiring such sound absorbing material (5),
Since the sound absorbing material is not directly placed on the floor structure as in the conventional case, there is no inconvenience that the sound absorbing material (5) moves during construction or the like. Moreover, since the holding net (6) can be kept at a constant height by the spring (7) and the tube (8), the degree of freedom of piping and wiring on the floor structure surface becomes extremely large, and vertical and horizontal arbitrary piping and Wiring is possible.

FIG. 5 shows a part of the floor panel material (10).
FIG. 7 is an exploded perspective view showing an example in which an inspection port is provided in the. Further, FIG. 6 is a cross-sectional view of the main part of the double floor structure provided with this inspection port. That is, for example, as illustrated in FIG. 5 and FIG. 6, the floor panel material (1) is provided with an inspection opening (17) having a stepped portion (16) formed in the inner peripheral portion thereof. 17) A reinforcing support frame (9) is arranged and fixed by supporting legs (4) on the back surface of the surrounding floor panel material (10). The inspection port (17) is provided with a lid member (100) whose upper surface is flush with the floor panel material (10).

Since the rigidity of the floor panel material (10) is weakened by the opening of the inspection port (17), a reinforcing support frame (9) for supporting the periphery of the lid (100) is arranged to increase the rigidity. The reinforcing support frame (9) can be easily assembled by being fixed to the floor panel material (10) with fixing screws (101) and (102) as illustrated in FIG. By disposing the above inspection port, maintenance of piping and wiring under the floor becomes extremely easy. In the case of the conventional structure, it could not be inspected unless the plywood was thrown away .

Of course, the double floor structure of the present invention is not limited to the above examples. It should be pointed out that various aspects of the detailed structure are possible.

[0029]

As described in detail above, according to the present invention, in an apartment house or the like, the construction is easy and the piping under the floor,
A double floor structure having a large degree of freedom of wiring, easy maintenance, and useful as a soundproof floor is realized.

[Brief description of drawings]

FIG. 1 is a plan view and a front view showing a floor panel material for a floor structure of the present invention.

FIG. 2 is a plan view illustrating the floor structure of the present invention.

FIG. 3 is a cross-sectional view of main parts corresponding to FIG.

FIG. 4 is an exploded perspective view illustrating a floor structure of the present invention in which a sound absorbing material is fixed.

FIG. 5 is an exploded perspective view illustrating a floor structure of the present invention having an inspection port.

FIG. 6 is a cross-sectional view of main parts corresponding to FIG.

FIG. 7 is a sectional view showing a conventional soundproof floor.

FIG. 8 is a perspective view illustrating a conventional soundproof floor having a double floor structure.

9 is a cross-sectional view of a main part corresponding to FIG.

FIG. 10 is a cross-sectional view of an essential part showing a support structure.

[Explanation of reference signs] 1 floor panel material 11 step portion 12 particle board 13 plywood 14 hole 15 back surface 16 step portion 17 inspection port 2a, 2b joint material 21 upper flat portion 22 lower flat portion 23 middle portion 24 wood screw 3 elastic material 4 Support leg 41 Support bolt 42 Panel receiver 5 Sound absorbing material 6 Holding net 7 Spring 8 Cylinder 9 Reinforcement support frame 10 Floor panel material 100 Lid 101, 102 Fixing screw

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication location E04F 15/18 N 7416-2E 15/20 7416-2E (72) Inventor Yuriko Uegaki Kadoma City, Osaka Prefecture 1048 Kadoma, Matsushita Electric Works, Ltd.

Claims (3)

[Claims] 1. A floor structure having an elastic body arranged on a floor structure and a floor surface supported by support legs, wherein the floor surface has a floor panel material and a joint material interconnecting the floor panel material, The floor panel material having a stepped portion around the upper surface is supported by the support legs, and the floor panel material is filled with the stepped portion and flush with the floor panel material. A double floor structure characterized by being connected by a joint member composed of a lower flat surface portion to be abutted and an intermediate portion which is narrower in width than these upper and lower flat surface portions and abuts on an end surface of a floor panel material. 2. The double floor structure according to claim 1, wherein a sound absorbing material is disposed and fixed to the back surface of the floor panel material by a holding net and supporting legs. 3. The floor structure according to claim 1, wherein the floor panel material is provided with an inspection opening having a stepped portion formed in an inner peripheral portion thereof, and a reinforcing support frame is provided on a rear surface of the floor panel material around the inspection opening with supporting legs. A double-floor structure in which the lid is installed and fixed by and the inspection port is equipped with a lid whose top surface is flush with the floor panel.