Floor structure

Abstract

To provide a floor structure that is highly resistant to a moving load applied by the passage of a heavy mobile body and has high workability.SOLUTION: This floor structure comprises, on an upper surface of a floor skeleton, a floor finishing structure provided with a substrate material composed of a medium-density fiberboard having a Brinell hardness of 16 N / MM2-45 N / mm2 and a deformation prevention member provided in the substrate material, and a floor base structure provided with a sacrificial board and / or a sheet panel arranged at least on a lower surface of the floor finishing structure. The floor structure has high resistance to a moving load, and it is difficult for bearing fracture to occur on a surface of the floor finishing structure.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] In particular, the present invention relates to a floor structure that has high resistance to moving loads and is less likely to experience bearing failure of the surface of the floor finishing structure. [Background technology]

[0002] In hospitals, nursing homes, and the like, heavy wheeled carts, such as operating tables and food delivery carts, frequently travel down the corridors. In such corridors, in order to prevent noise caused by the passage of carts and other moving objects from traveling to the floor below, and to make effective use of the indoor space by storing pipes and wiring under the floor, a floor structure is usually used in which support legs are provided on the floor framework and a floor panel material such as particle board, a floor material made of plywood such as lauan, and a floor finishing material such as sheet material are arranged in that order from the bottom on the support legs. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-21328 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional floor structure described above, when the moving object traveling on it is a heavy cart or the like, the load is concentrated on the caster parts of the cart, resulting in a very large moving load being placed on the floor material, which creates the problem of making the floor material prone to dents and scratches. Furthermore, the above-mentioned dents and scratches in the flooring material can also cause problems such as swelling in the floor finishing material applied on the flooring material. In order to solve the problem of dents and scratches in floor materials caused by the traffic of heavy moving objects as described above, floor finishing structures have been proposed that use hard-surfaced steel plates or the like as floor materials instead of plywood. However, such floor finishing structures have the problem that construction and on-site adjustment are difficult because floor materials such as steel plates are heavy. SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above-mentioned problems of the conventional technology and to provide a floor structure which is highly resistant to the moving load caused by the passage of heavy moving objects and which is easy to install. [Means for solving the problem]

[0005] In order to achieve the above object, the floor structure according to the present invention has a Brinell hardness of 16 N / mm 2 ~45N / mm 2 The floor finishing structure is characterized in that it is provided on the upper surface of a floor frame with a base material made of medium density fiberboard, a deformation prevention member provided on the base material, and a floor base structure with a bracing board material and / or a sheet panel placed on at least the underside of the floor finishing structure, thereby having high resistance to moving loads and making it difficult for pressure damage to occur to the surface of the floor finishing structure. The deformation prevention member may be disposed on at least the upper surface of the base material. The deformation prevention member may also be made of a sheet or flooring material made of polyvinyl chloride resin. Preferably, the medium density fiberboard has a density of 0.6 g / cm 3 ~1.2g / cm 3 and the thickness may be 5.5 mm to 15 mm. The floor structure may further include a support structure that enables the height of the floor finishing structure and the floor substructure to be adjusted on the upper surface of the floor base. Effect of the Invention

[0006] The floor structure according to the present invention has a Brinell hardness of 16 N / mm 2 ~45N / mm 2A floor finishing structure having a base material made of medium density fiberboard and a deformation prevention member provided on the base material, and a floor base structure having a bracing board material and / or a sheet panel placed on at least the underside of the floor finishing structure are provided on the upper surface of the floor body, so that the moving load resistance performance is extremely high, and the surface of the floor finishing structure is unlikely to burst under pressure, and dents and scratches are unlikely to occur on the surface of the floor finishing structure due to the frequent passage of moving objects, which is particularly useful in hospital facilities where heavy wheeled carts such as operating tables and food serving carts are frequently used. In addition, since medium density fiberboard is used as the base material instead of steel plate or the like, it is lighter than when heavy materials such as steel plate are used as the base material, making construction easier and reducing the load on the foundation. Furthermore, since the deformation prevention member is attached to the base material made of medium density fiberboard, the medium density fiberboard will not change in size due to the influence of the surrounding environment. [Brief description of the drawings]

[0007] [Figure 1] 1 is a schematic side view of a single-layer floor structure as a first embodiment of a floor structure according to the present invention. FIG. [Diagram 2] FIG. 2 is a schematic side view of a double floor structure, among multi-layer floors, as a second embodiment of the floor structure according to the present invention. [Diagram 3] 3 is a schematic side view of another embodiment of a double floor structure of a multi-layer floor as a third embodiment of a floor structure according to the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of a floor structure according to the present invention will be described with reference to the accompanying drawings. The floor structure of the present invention comprises a floor finishing structure having a base material made of medium-density fiberboard and a deformation prevention member attached to the base material, and a floor base structure having a bracing board material and / or a sheet panel placed on at least the underside of the floor finishing structure, which are provided on the upper surface of a floor body. The medium density fiberboard is a medium density fiberboard (MDF) specified in JISA5905, and has a Brinell hardness of 16N / mm 2 ~45N / mm 2 It is made of medium density fiberboard. Also, preferably, the medium density fiberboard has a density of 0.6 g / cm 3 ~1.2g / cm 3 The thickness is 5.5 mm to 15 mm. The deformation prevention member is attached to the upper surface or the lower surface, or to both the upper and lower surfaces, of the base material made of the medium density fiberboard using an adhesive. The deformation prevention member may be, for example, a sheet or tile made of polystyrene, polypropylene, polyethylene terephthalate or vinyl chloride resin, preferably a single-layer sheet or tile made of vinyl chloride resin, having a thickness of 1 to 3 mm. Also, as the deformation prevention member, flooring material such as solid wood, plywood, veneer, sawn board or sheet flooring can be used, and the thickness thereof is 12 mm or more. Specifically, the adhesive used to attach the deformation prevention member to the base material may be, for example, an epoxy adhesive, a urethane adhesive, or an acrylic adhesive. Furthermore, the sheet-like panels constituting the floor underlay structure are made of, for example, particle board, or a panel made of particle board with aluminum foil and / or kraft paper attached thereto, and the base board material is made of, for example, softwood plywood or gypsum board. Furthermore, the floor structure may have a support structure that supports the floor finishing structure and the floor substructure on the upper surface of the floor body in a height-adjustable manner, thereby allowing the floor finishing structure and the floor substructure to be grounded horizontally even if the upper surface of the floor body on which the support structure is installed is uneven, and is not dependent on the design of the underfloor space at the installation location.

[0009] For floor finishing structures, Brinell hardness 16N / mm 2 , density 0.6g / cm 3A test specimen (Example 1) was made by attaching a single-layer long sheet (floor sheet for moving load t2.0: Tajima Roofing Co., Ltd.) made of 2.0 mm thick polyvinyl chloride resin to the upper surface of the floor underlayment made of medium density fiberboard with a board thickness of 9 mm, using an epoxy adhesive (EP-30: Tajima Roofing Co., Ltd.), and a moving load resistance test was conducted using the JISA1454 caster resistance test A-2 method. The planar dimensions of the test specimen are 2560 mm x 1624 mm. Similarly, Brinell hardness is 12N / mm 2 , density 0.5g / cm 3 A test specimen (Comparative Example 1) was made by attaching the same sheet material as in Example 1 to the upper surface of a floor underlayment made of a medium density fiberboard with a board thickness of 9 mm, and a Brinell hardness of 7 N / mm 2 , density 0.7g / cm 3 A test specimen (Comparative Example 2) was made of 9 mm thick lauan plywood with the same sheet material as in Example 1 attached to the upper surface thereof, and a moving load resistance test was carried out using the JISA1454 Caster Resistance Test A-2 method under the same conditions as in Example 1. The plan view dimensions of the test specimens of Comparative Examples 1 and 2 are the same as those of the test specimen of Example 1. A moving load resistance test was carried out using JIS A1454 Caster Resistance Test Method A-2 by measuring the time until the sheet material of Example 1, Comparative Example 1 and Comparative Example 2 swelled. The results of the above tests are shown in Table 1. [Table 1] From the above test results, it was confirmed that the moving load resistance time of the floor finishing structure of Example 1 was significantly longer than that of Comparative Examples 1 and 2. More specifically, even if it is the same medium density fiberboard, the Brinell hardness is 12N / mm 2 and density is 0.5g / cm 3 The Brinell hardness is 16 N / mm 2 and density is 0.6g / cm 3 The floor finishing structure of Example 1, which has a Brinell hardness of 16 N / mm, is almost twice as long as the caster test (A-2 method), i.e., the time until the sheet material bulges is almost twice as long. 2and density is 0.6g / cm 3 It was confirmed that by using medium density fiberboard, the surface of the underfloor material is less likely to be scratched or dented, even when heavy moving objects pass over it.

[0010] Next, the test specimen of Example 1 was left in an environment with a temperature of 35°C and a humidity of 80% for 48 hours, and the amount of change in the vertical dimension when viewed from above was measured after being left in an environment with a temperature of 5°C and a humidity of 20% for 48 hours. The difference between the two amounts of change was recorded as the "dimensional change", and the rate of change relative to the vertical length of the test specimen (2560 mm) was calculated based on Equation 1. Dimensional change / Vertical dimension of specimen × 100 (Formula 1) Furthermore, the same medium density fiberboard as that of Example 1 (Brinell hardness 16 N / mm 2 , density 0.6g / cm 3 A test specimen (Example 2) was prepared by attaching a 12.0 mm thick composite flooring material to the top surface of a base material having the same planar dimensions as the test specimen of Example 1, with the base material being 12.0 mm thick (board thickness 9 mm). The test specimen was left for 48 hours in an environment with a temperature of 35°C and a humidity of 80%, and the amount of change in the vertical dimension in a planar view after being left for 48 hours in an environment with a temperature of 5°C and a humidity of 20% was measured. The difference between the two amounts of change was recorded as the "dimensional change", and the rate of change relative to the vertical length of the test specimen (2560 mm) was calculated based on the above formula 1. Furthermore, the same medium density fiberboard as that of Example 1 (Brinell hardness 16 N / mm 2 , density 0.6g / cm 3 A test specimen (Comparative Example 3) having a base material with the same planar dimensions as the test specimen of Example 1 (length x width x width 9 mm, plate thickness 9 mm) and no sheet as a deformation prevention member was attached to the base material was used. The amount of change in the vertical dimension in plan view after leaving it in an environment with a temperature of 20°C and a humidity of 65% for 48 hours and the amount of change in the vertical dimension in plan view after leaving it in an environment with a temperature of 20°C and a humidity of 20% for 48 hours were measured, and the difference between the two amounts of change was recorded as the "dimensional change," and the rate of change relative to the vertical length of the test specimen (1,820 mm) was calculated based on the above formula 1. The amount and rate of dimensional change in Example 1, Example 2 and Comparative Example 3 are shown in Table 2. [Table 2] From the above test results, it can be seen that in Example 1, in which a sheet was attached to the medium-density fiberboard, and Example 2, in which a flooring material was attached, the amount and rate of dimensional change due to the influence of the surrounding environment were extremely small, but in Comparative Example 3, in which no deformation prevention members such as a sheet or flooring material were attached, both the amount and rate of dimensional change were large, even though the surrounding environmental conditions were more favorable than those of Examples 1 and 2. From this, it can be confirmed that the sheet and flooring material as deformation prevention members suppress dimensional change of the medium-density fiberboard due to the influence of the surrounding environment, and from the amount and rate of dimensional change in Comparative Example 3, it can be seen that the medium-density fiberboard not having a deformation prevention member such as a sheet or flooring material attached is not suitable for use as a floor finishing structure.

[0011] As described above, the floor finishing structure of this embodiment has sufficient moving load resistance to withstand the frequent movement of heavy wheeled carts such as operating tables and meal delivery carts, does not undergo dimensional changes due to the influence of the surrounding environment, is extremely light compared to steel plates, etc., and is easy to install.

[0012] In the above embodiment, the Brinell hardness is 16 N / mm 2 , density 0.6g / cm 3 A caster resistance test was conducted using a test piece (Example 1) of a floor finishing structure in which a 9 mm thick medium density fiberboard was used as a base material and a 2.0 mm thick sheet made of polyvinyl chloride resin was attached to the top surface of the base material as a deformation prevention member. In addition to the test piece of Example 1, a dimensional change test due to the surrounding environment was conducted on a test piece (Example 2) of a floor finishing structure in which a 12.0 mm thick flooring material was attached to the top surface of a base material made of the same medium density fiberboard as in Example 1. The inventors found that the Brinell hardness of the test piece was 16 N / mm 2 ~45N / mm 2 , density is 0.6g / cm 3 ~1.2g / cm 3Tests similar to those of Examples 1 and 2 were conducted using floor finishing structures in which a medium-density fiberboard with a thickness in the range of 5.5 mm to 15 mm was used as the base material and a sheet or tile with a thickness in the range of 1 to 3 mm was attached to the upper and / or lower surface of this base material, and a floor finishing structure in which a flooring material with a thickness of 12 mm or more was attached to the upper surface of the base material made of medium-density fiberboard. It was confirmed that, as with Examples 1 and 2, with the above configuration and within the above range, it is possible to obtain moving load resistance performance and dimensional change resistance performance sufficient for use as a floor finishing structure for use in floor structures.

[0013] Next, an embodiment of a floor structure according to the present invention using the above-mentioned floor finishing structure will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view showing a single-layer floor structure as a first embodiment of the floor structure according to the present invention. The single-layer floor structure according to the first embodiment is formed by laminating a subfloor structure 3 and a floor finishing structure 4 on an upper surface 1 of a floor framework. The floor base structure 3 is formed by sequentially stacking sheet panels 3a and batten boards 3b, and the floor finishing structure 4 is formed by sequentially stacking a base material 4a made of medium density fiberboard and a single-layer long sheet 4b as a deformation prevention member attached to the upper surface of the base material 4a with an adhesive. The deformation prevention member is not limited to the single-layer long sheet, and may be, for example, a resin tile or flooring material. Specifically, the sheet panel 3a is made of, for example, a particle board or a particle board with sheets on both sides, and has a board thickness of, for example, 20 to 25 mm. The battened board material 3b is made of, for example, softwood plywood and has a board thickness of, for example, 5.5 mm to 15 mm. In this first embodiment, the medium density fiberboard constituting the base material 3c has a Brinell hardness of 16 N / mm 2 ~45N / mm 2 and its density is 0.6 g / cm 3 ~1.2g / cm 3 and the thickness is 5.5 mm to 15 mm. According to the first embodiment described above, in a single-layer floor structure in which the floor understructure 3 and the floor finishing structure 4 are laminated directly on the upper surface 1 of the floor frame, a sheet-like panel 3a and a batten 3b are laminated on the floor understructure 3. 2 ~45N / mm 2 and 0.6 g / cm 3 ~1.2g / cm 3 Since the floor finishing structure 4 is laminated with a base material 4a made of medium density fiberboard having a thickness of 5.5 mm to 15 mm and a single-layer long sheet 4b as a deformation prevention member attached to the upper surface of the base material 3c with an adhesive, it is possible to significantly improve resistance to dents and scratches caused by large moving loads, and the floor finishing structure has high moving load resistance and is less likely to burst under pressure on the surface, making it useful in hospital facilities where heavy wheeled carts such as operating tables and meal serving carts are frequently used. In the first embodiment of the floor structure described above, the floor base structure 3 includes the sheet panel 3a and the lining board material 3b, but this configuration is not limited to this embodiment, and it is also possible to provide only one of the sheet panel 3a and the lining board material 3b. In addition, the number of the sheet panel 3a and the lining board material 3b may be any number, and a configuration in which multiple sheets are stacked may also be used.

[0014] Next, a multi-layer floor, specifically a double floor structure, will be described as a second embodiment of the floor structure according to the present invention. FIG. 2 is a schematic side view showing a double floor structure of a multi-layer floor as a second embodiment of the floor structure according to the present invention. The double floor structure according to the second embodiment is formed by supporting a floor base structure 13 with support members 12 erected at a predetermined interval on the floor framework upper surface 10, and laminating a floor finishing structure 14 on the floor base structure 13. The floor base structure 13 is formed by laminating a sheet panel 13a and a batten board material 13b in order, and the floor finishing structure 14 is formed by laminating a base material 14a made of medium density fiberboard and a single-layer long sheet 14b as a deformation prevention member attached to the upper surface of the base material 14a with an adhesive in order. The deformation prevention member is not limited to a single-layer long sheet, and for example, a resin tile or flooring material may be used. Specifically, the sheet panel 13a is made of, for example, a particle board or a particle board with sheets on both sides, and has a board thickness of, for example, 20 to 25 mm. The battened board material 13b is made of, for example, softwood plywood and has a board thickness of, for example, 5.5 mm to 15 mm. The support members 12 are provided with cushion rubber 12a at their bottoms and are configured so that their height can be adjusted. They can be installed in any number and at any pitch depending on the purpose of use of the facility in which the floor structure is to be installed. Specifically, for example, when the planar dimensions of the floor understructure 13 are 910 mm in length and 1820 mm in width, the support member 12 is For example, eight lines may be provided in each row in a staggered arrangement with a horizontal pitch of 735 mm and a vertical pitch of 280 mm. It is also possible to provide 12 lines at equal intervals in each row with a horizontal pitch of 510 mm and a vertical pitch of 315 mm. It is also possible to provide 15 equally spaced lines in each row with a pitch of 385 mm in the horizontal direction and 315 mm in the vertical direction. The staggered arrangement refers to an arrangement in which, when a plurality of rows of support members 12 are provided at equal intervals in the horizontal direction, the positions of the support members 12 are shifted in the horizontal direction for each row. In this embodiment, the medium density fiberboard constituting the base material 13c has a Brinell hardness of 16 N / mm 2 ~45N / mm 2 and its density is 0.6 g / cm 3 ~1.2g / cm 3 and the thickness is 5.5 mm to 15 mm. According to the second embodiment described above, in the double floor structure in which the support member 12 directly supports the floor understructure 13, a sheet panel 13a and a bracing board 13b are placed on the floor understructure 13, and the sheet panel 13a and the bracing board 13b are placed on the floor understructure 13. 2 ~45N / mm 2 and its density is 0.6 g / cm 3 ~1.2g / cm 3Since the floor finishing structure 14 is laminated with a base material 14a made of medium density fiberboard having a thickness of 5.5 mm to 15 mm and a single-layer long sheet 14b as a deformation prevention member attached to the upper surface of the base material 14a using an adhesive, it is possible to significantly improve resistance to dents and scratches caused by large moving loads, and the floor finishing structure has high moving load resistance and is less likely to burst under pressure on the surface, making it useful in hospital facilities and the like where heavy wheeled carts such as operating tables and meal serving carts are frequently used. In the double floor structure according to the second embodiment described above, the floor base structure 13 includes the sheet panel 13a and the lining board 13b, but this configuration is not limited to this embodiment, and it is also possible to provide only one of the sheet panel 13a and the lining board 13b. In addition, the number of the sheet panel 13a and the lining board 13b may be any number, and a configuration in which multiple panels are stacked may also be used.

[0015] Next, a multi-layer floor as a third embodiment of the floor structure according to the present invention, specifically, another embodiment of a double floor structure, will be described. FIG. 3 is a schematic side view showing another embodiment of a double floor structure of a multi-layer floor as a third embodiment of the floor structure according to the present invention. The double floor structure of the third embodiment comprises support members 21 erected at a predetermined interval on the upper surface 20 of the floor body, which support a number of equally spaced joists 22, which in turn support a number of equally spaced joists 23 on the joists 22, a floor base structure 24 provided on the joists 23, and a floor finishing structure 25 laminated on the floor base structure 24. The support member 21 is preferably configured to be height adjustable, and an elastic member (not shown) is interposed between the support member 21 and the beams 22 and / or between the beams 22 and the joists 23. The support members 21 can be installed in any number and at any pitch depending on the purpose of use of the facility in which the double floor structure is to be installed. Specifically, in the case of a general gymnasium, for example, they can be arranged vertically and horizontally at 900 mm pitch, with each row spaced equally or in a staggered arrangement, or they can be arranged at a pitch of approximately 450 mm to 1400 mm, with each row spaced equally or in a staggered arrangement, depending on other purposes. The joists 22 may be made of, for example, square steel material having a thickness of 1.6 to 2.3 mm, and the joists 23 may be made of, for example, hat-shaped steel material having a thickness of 1.2 to 1.6 mm. Similarly to the support members 21, the joists 22 and joists 23 may be provided in any number and at any pitch depending on the purpose of use of the facility in which the double floor structure is to be provided, and specifically, the joists 22 may be evenly arranged, for example, at a pitch of about 900 mm, and the joists 23 may be evenly arranged, for example, at a pitch of about 300 mm. In this embodiment, the floor base structure 24 is made of two batten boards 24a and 24b having a thickness of 5.5 mm to 15 mm, for example, and the floor finishing structure 25 is made of a batten board having a Brinell hardness of 16 N / mm. 2 ~45N / mm 2 and its density is 0.6 g / cm 3 ~1.2g / cm 3 The base material 25a is made of a medium density fiberboard having a thickness of 5.5 mm to 15 mm, and the flooring material 25b is attached to the upper surface of the base material 25a with an adhesive as a deformation prevention member. The deformation prevention member is not limited to the flooring material 25b, and may be, for example, a resin sheet or a tile. According to the third embodiment, in the assembled floor structure in which the strength is increased while maintaining the cushioning property, a Brinell hardness of 16 N / mm is applied to the floor base structure 24 consisting of the batten boards 24a and 24b. 2 ~45N / mm 2 and its density is 0.6 g / cm 3 ~1.2g / cm 3Since the floor finishing structure 25 is laminated with a base material 25a made of a medium density fiberboard having a thickness of 5.5 mm to 15 mm and a flooring material 25b as a deformation prevention member attached to the upper surface of the base material 25a using an adhesive, it is possible to significantly improve resistance to dents and scratches caused by large moving loads, and the floor finishing structure has high moving load resistance and is less likely to burst under pressure on the surface, making it useful in hospital facilities and the like where heavy wheeled carts such as operating tables and food serving carts are frequently used. In the third embodiment described above, the floor underlay structure 24 is provided with two lining boards 24a and 24b, but this configuration is not limited to this embodiment, and the number of lining boards may be one, or three or more. [Explanation of symbols]

[0016] 1 Upper surface of floor structure 3 Subfloor structure 3a Sheet Panel 3b Slap board material 4. Floor finishing structure 4a Base material (medium density fiberboard) 4b Single-layer long sheet (deformation prevention material) 10 Upper surface of floor structure 12 Support member 12a Cushion Rubber 13 Subfloor structure 13a Sheet Panel 13b Laminated board material 14 Floor finishing structure 14a Base material (medium density fiberboard) 14b Single-layer long sheet (deformation prevention material) 20 Upper surface of floor structure 21 Support member 22 Beam 23 Joist material 24 Subfloor structure 24a Slap board material 24b Slap board material 25 Floor finishing structure 25a Base material (medium density fiberboard) 25b Flooring materials (deformation prevention materials)

Claims

1. Brinell hardness is 16N / mm ２ ~45N / mm ２ A floor finishing structure including a base material made of a medium density fiberboard and a deformation prevention member provided on the base material; A floor base structure comprising a batten board and / or a sheet panel arranged on at least the underside of the floor finishing structure. This floor structure has a high moving load resistance and is less likely to cause pressure damage to the surface of the floor finishing structure.

2. The deformation prevention member is disposed on at least the upper surface of the base material.

2. The floor structure according to claim 1.

3. The deformation prevention member is a sheet or tile made of polyvinyl chloride resin.

3. The floor structure according to claim 2.

4. The deformation prevention member is made of flooring material.

3. The floor structure according to claim 2.

5. The medium density fiberboard has a density of 0.6 g / cm ３ ~1.2g / cm ３ Consists of 3. The floor structure according to claim 2.

6. The medium density fiberboard has a thickness of 5.5 mm to 15 mm.

3. The floor structure according to claim 2.

7. The floor structure comprises: The floor finishing structure and the floor base structure are further provided with a support structure that allows the height of the floor finishing structure and the floor base structure to be adjusted on the upper surface of the floor base. A floor structure according to any one of claims 1 to 6.

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