KR102608361B1 - Access floor and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a raised flooring material and a method of manufacturing the same, and relates to a raised flooring material that realizes high strength and light weight and has excellent constructability by including an integrated structure in which a panel and support made of composite material are integrated.

Description

Access floor and manufacturing method thereof}

The present invention relates to a raised flooring material and a method of manufacturing the same, and more specifically, to a raised flooring material in which a panel and a support made of a composite material are integrated.

In general, a double floor (ACCESS FLOOR) is used to construct another floor spaced apart on top of the structural floor to secure space in between to accommodate devices such as power and computer communication wiring or air conditioning equipment. In other words, in offices, clean rooms, schools, computer rooms, hospitals, various factories, etc., double construction is done at a height of about 50 to 300 mm from the existing floor for information and power cables, air purification, etc., thereby creating a comfortable office environment and ensuring the safety of wiring. and flexibility are secured. Various forms of such panels for raised flooring have been disclosed, including registered utility model No. 20-0462731.

Conventional flooring materials use high-strength materials such as steel, so they weigh a lot, putting a burden on the load of the building, and causing inconvenience in transportation and construction. In addition, conventional flooring is composed of several accessories such as floor panels, frames, supports, corner lock bolts, and rubber gaskets, so it takes a considerable amount of time to combine or assemble these accessories at the construction site, and construction efficiency is low because a large number of construction workers are required. there is a problem.

In order to solve the above problems, the present invention aims to provide a double flooring material containing a high-strength yet lightweight composite material as a material that can replace steel.

In addition, the present invention aims to solve the problem of improving construction efficiency by implementing the panels and supports forming the raised flooring in an integrated form, thereby reducing the number of accessories and simplifying construction at the construction site.

As a means to solve the above-mentioned problems,

The raised flooring of the present invention includes an integrated structure including a first panel parallel to the floor and a support unit integrally coupled to a lower part of the first panel to space the first panel from the floor; and a second panel laminated on the upper surface of the first panel; It includes, the integrated structure contains 30% by weight or more of glass fiber and is formed of a composite composition containing a thermoplastic polymer, the second panel is a steel panel, the support includes an accessory coupling groove, and the accessory It is characterized by an insert nut being coupled to the coupling groove.

In addition, the thermoplastic polymer is characterized in that it contains at least one selected from polypropylene and polyamide.

Additionally, the composite composition is characterized in that it contains 50% to 70% by weight of a thermoplastic polymer.

In addition, the first panel is characterized by including a groove in an area of 30% to 50% of the area excluding the area where the support is joined.

In addition, the first panel is characterized by a thickness of 20mm to 100mm.

Additionally, the first panel is characterized by including a first connection groove at the edge of the upper surface.

Additionally, the second panel is characterized by including a second connection groove at the corner.

In addition, the second panel is characterized by a thickness of 1mm to 20mm.

In addition, it is characterized by including an adhesive between the first panel and the second panel.

In addition, the specific strength of the integrated structure is characterized in that it is 50 kNm/kg to 150 kNm/kg.

The method for manufacturing a raised flooring of the present invention includes the steps of (a) mixing a thermoplastic polymer and 30% by weight or more of glass fiber to form a composite composition; (b) inserting the insert nut and the second panel into the mold; (c) injecting the composite composition into the mold; (d) forming by injection and processing by pressing; It is characterized by including.

Additionally, the thermoplastic polymer is characterized in that it contains at least one of polypropylene and polyamide.

The raised flooring material of the present invention has excellent strength by including a composite material, satisfies the physical properties of a raised flooring material, and is lightweight, so it has excellent transportability and constructability.

In addition, the number of accessories required for the construction of raised flooring is small, making distribution and construction easy, horizontal work during construction is easy, and construction efficiency is excellent as the construction time is short and construction can be done with a small number of construction personnel.

In addition, by installing the cable line inside the raised flooring, the indoor environment can be neatly created to create a better interior effect, and wiring safety and partial repairs can be easily made. It is installed floating on the floor of the building to eliminate noise between floors and maintain heat. It has the effect of reducing the sound of the floor when walking.

Figure 1 is an exploded perspective view of the raised flooring of the present invention.
Figure 2 is a schematic diagram showing the structure of the support of the present invention and the form in which the support is coupled to the support.
Figure 3 is a perspective view of the integrated structure of the present invention.
Figure 4 is a schematic diagram showing a structure in which multiple integrated structures of the present invention are connected.

Hereinafter, the raised flooring of the present invention and its manufacturing method will be described in detail with reference to the drawings. The terms or words used below should not be construed as limited to their usual or dictionary meanings, and based on the principle that an inventor can appropriately define the concept of a term in order to explain his or her invention in the best way, It should be interpreted with meaning and concept consistent with the technical idea of the present invention.

Figure 1 is an exploded perspective view of a raised flooring material. The raised flooring 100 according to one embodiment of the present invention includes a support 10, a first panel 20, and a second panel 30.

The support 10 is a means for supporting the panel of the raised flooring, has a pillar shape such as a cylinder or square pillar, and includes means for adjusting the height of the raised flooring.

The support 10 is integrally coupled to the lower part of the first panel 20 and separates the first panel from the floor. The support 10 is preferably coupled to the floor and the first panel 20 in a vertical direction. A plurality of supports 10 may be coupled to the lower part of the first panel 20, and it is preferable to arrange 4 to 9 supports. The support 10 may be coupled to the lower part of each corner of the first panel 20, and to the lower part of the midpoint of each of the two corners, and may be coupled to the lower part of the first panel 20 to support the first panel 20. It can be combined where necessary.

The height of the support 10 is not particularly limited, and may be formed at a desired height to separate the first panel 20 from the floor.

The support 10 of the present invention can adjust the height of the raised flooring by separating the first panel 20 from the floor due to its own height, but in addition, the insert nut 12 included as a means of adjusting the height of the raised flooring ), you can adjust the height of the raised flooring. Figure 2 shows the structure of the support of the present invention and the manner in which the support is coupled to the strut.

Specifically, the support 10 has an attached coupling groove 11 formed at the bottom, which is an empty space inside. The auxiliary coupling groove 11 may have a pillar shape with a thread and a threaded groove, but is not limited thereto, and preferably has a shape corresponding to the insert nut 12 coupled to the auxiliary coupling groove 11. The upper surface of the accessory coupling groove 11 is blocked by the cured composite material composition, but the lower surface is open so that the insert nut 12 can be coupled thereto. It is preferable that the largest cross-sectional diameter of the accessory coupling groove 11 is smaller than the cross-sectional diameter of the support 10.

An insert nut 12 may be coupled to the accessory coupling groove 11. The insert nut 12 may be coupled to the auxiliary coupling groove 11 of the support 10 by insert molding.

In another embodiment, the insert nut 12, which has an outer peripheral surface corresponding to the thread or thread formed in the accessory coupling groove 11, can be rotated and inserted to couple it.

In another embodiment, adhesive may be included between the accessory coupling groove 11 and the insert nut 12. The adhesive may be liquid or solid, and known adhesive means may be used without limitation.

The insert nut 12 includes threads and threads on its outer peripheral surface. In addition, the inner surface of the insert nut 12 includes threads and threads. The insert nut 12 is coupled to the auxiliary coupling groove 11 of the support 10 by threads and threads on the outer peripheral surface, and thus has excellent coupling strength with the support 10. In addition, the insert nut 12 is coupled to the strut 40 through internal threads and threads, and thus has excellent coupling strength with the strut 40.

The insert nut 12 may be selected from a metal-based material that satisfies mechanical strength such as shear stress and compression tension, may be selected from engineering plastic, or may be selected from high-strength compressed wood. However, it is not limited to these, and a lighter material can be selected without limitation in order to reduce the weight of the raised flooring of the present invention.

The support 10 of the present invention can be coupled to the support 40 through an insert nut 12. The support 40 is a part for fixing the raised flooring to the floor and may include a pillar and a seat plate, and the pillar preferably includes threads and threads on the outer peripheral surface. It can be strongly coupled to the insert nut through the thread and groove.

The support 40 may be selected from a metal-based material that satisfies mechanical strength such as shear stress and compression tension, may be selected from engineering plastic, or may be selected from high-strength compressed wood. However, it is not limited to these, and a suitable material can be selected without limitation in order to firmly fix the raised flooring of the present invention.

The support 40 is not particularly limited as long as it has a shape and size that can be coupled to the insert nut. It may further include components necessary for fixing the raised flooring material to the indoor floor.

The double flooring of the present invention is very easy to adjust the height because the support 10 is coupled to the support 40 by the insert nut 40, and has the effect of simplifying construction at the construction site. By adjusting the length at which the column of the support 40 is inserted into the support 10, the height at which the raised flooring is separated from the floor can be adjusted. If the length at which the pillars of the struts 40 are inserted into the supports 10 are short, the height at which the double flooring is separated from the floor increases, and if the length at which the pillars of the struts 40 are inserted into the supports 10 are long, the double flooring increases. The height separated from the floor decreases.

In addition, the level of the raised flooring material 100 can be easily adjusted by adjusting the length of the pillar 40 inserted into each of the plurality of supports 10 included in the single raised flooring material 100.

The first panel 20 of the present invention is parallel to the floor of the building, and can be spaced at a certain height from the floor by the support 10.

The first panel 20 may include a groove 21. The groove 21 refers to an empty space in the first panel 20, and by including the groove 21, the weight of the raised flooring can be realized.

The groove 21 may be formed in the remaining portion of the first panel 20 except for the portion where the support 10 is coupled. The first panel 20 may include a groove 21 in an area of 30% to 50% of the area excluding the portion where the support is coupled, and may include a groove portion 21 in 40% to 45% of the area excluding the portion where the support is coupled. It is preferable that the area includes the groove portion 21. If the groove is formed in less than 30% of the area excluding the area where the support of the first panel is joined, the weight reduction effect of the raised flooring is minimal, and if it exceeds 50%, the strength of the raised flooring is reduced.

The groove 21 may be formed to penetrate from the upper surface to the lower surface of the first panel 20, and may be formed to have a depth smaller than the thickness of the first panel 20. At this time, the groove 21 may be formed on the top, bottom, or inside of the first panel 20, and the location where the groove is formed is not particularly limited. However, in order to evenly distribute the load applied to the raised flooring, it is preferable that the groove portion 21 is formed symmetrically.

The first panel 20 may include a first connection groove (a) at a corner of the upper surface. The first connection groove (a) is a portion that enables connection between adjacent raised flooring materials. The first connection groove (a) may be formed to a depth of about 1 mm to 10 mm from the upper surface of the first panel 20, but is not limited thereto. In addition, the first connection groove (a) is preferably a rectangle whose horizontal and vertical lengths are the same so that it can be connected in parallel with the first connection groove (a) formed in an adjacent raised flooring material.

The first panel 20 may have a thickness of 10 mm to 100 mm. Preferably it may be 20mm to 50mm. More preferably, it may be 20mm to 40mm. If the thickness is less than 10 mm, it is not suitable as a flooring material due to low strength, and if it exceeds 100 mm, the overall thickness of the double floor material becomes thicker and the weight increases.

Figure 3 is a perspective view of the integrated structure of the present invention. The support 10 and the first panel 20 are injection molded from the same material to form an integrated structure in which they are integrated.

Since the support 10 and the first panel 20 are integrated, no separate means are required for joining, making it economical, and the number of accessories used in construction is small, making transportation and construction easy.

The integrated structure is formed of a composite composition. The composite composition includes glass fiber and thermoplastic polymer. The composite composition contains more than 30% by weight of glass fiber. Preferably, it may be contained in 30% by weight to 50% by weight, more preferably in 30% by weight to 43% by weight, and most preferably in 33% by weight to 43% by weight. The raised flooring material of the present invention is characterized in that it contains a high content of glass fiber. When the glass fiber content is less than 30% by weight, the strength and specific strength are lowered compared to the raised flooring material made of conventional steel materials, and the weight of 50% is lowered. If it exceeds %, there is a problem that moldability is deteriorated. The glass fiber absorbs most of the load applied to the raised flooring and serves as a reinforcing material for the raised flooring. The glass fibers may be arranged in one direction or multiple directions within the integrated structure, and there is no limit to the directionality of the arrangement.

The thermoplastic polymer includes at least one selected from polypropylene (PP) and polyamide (PA).

That is, the composite composition of the present invention includes glass fiber and polypropylene; Glass fiber and polyamide; or fiberglass, polypropylene and polyamide; may include.

The composite composition may include 50% by weight to 70% by weight of the thermoplastic polymer. Preferably, it may contain 57% by weight to 70% by weight, and more preferably, it may contain 57% by weight to 67% by weight. If the thermoplastic polymer is contained less than 50% by weight, the content of glass fiber increases, causing problems with formability, and if the thermoplastic polymer is contained in excess of 70% by weight, the content of glass fiber is lowered, resulting in lower yield strength, similar to the conventional steel double floor material. As the amount of composite material injection required to demonstrate strength increases, lightweighting becomes difficult and costs increase.

The specific strength of the integrated structure is 50 kNm/kg to 150 kNm/kg. Preferably it is 73.1 kNm/kg to 140.9 kNm/kg, and more preferably 111.1 kNm/kg to 140.9 kNm/kg. If the specific strength is less than 50 kNm/kg, lightweighting cannot be achieved, and if it exceeds 150 kNm/kg, the cost of raw materials for the composite composition to increase the specific strength increases, making manufacturing cost competitive and marketability very low compared to steel materials. do.

Since the integrated structure has a higher specific strength than steel, the raised flooring 100 including the integrated structure has the advantage of being lightweight while having the same or higher strength as a conventional raised flooring made only of steel.

The second panel 30 of the present invention may be laminated on the upper surface of the first panel 20.

The second panel 30 is preferably a steel panel. The second panel 30 serves to reinforce the strength of the first panel 20 formed of the composite composition. However, since it is intended to provide additional strength to the strength of the first panel 20, it is preferable to use a thin panel having a thickness of about 30% of the thickness of a conventional raised floor made only of steel.

The thickness of the second panel 30 is 1 mm to 20 mm. Preferably it is 5 mm to 15 mm, and more preferably 7 mm to 10 mm. If the thickness is less than 1 mm, the additional strength reinforcement effect for the strength of the raised flooring that can be obtained by the first panel cannot be obtained, and if it exceeds 20 mm, the overall thickness of the raised flooring becomes thicker and the weight increases.

The second panel 30 may include a second connection groove (a') at each corner. The second connection groove (a') is a portion that enables connection between adjacent raised flooring materials. The second connection groove (a') is preferably formed to penetrate from the upper surface to the lower surface of the second panel 30. In addition, the second connection groove (a') is preferably a rectangle whose horizontal and vertical lengths are the same so that it can be connected in parallel with the second connection groove (a') formed in an adjacent raised floor material.

The second connection groove (a') of the second panel 30 is preferably a square of the same size as the first connection groove (a) of the first panel 20, and the second panel 30 is connected to the first connection groove (a'). When laminated on the upper surface of the panel 20, the second connection groove (a') of the second panel 30 is laminated and connected to the upper part of the first connection groove (a) of the first panel 20, thereby forming the second panel. A connecting groove (a+a') having a depth ranging from (30) to the upper surface of the first panel (20) is formed.

In one embodiment of the present invention, the second panel 30 can be coupled to the upper surface of the first panel 20 by insert injection without using a separate adhesive.

In another embodiment of the present invention, the second panel 30 may be coupled to the upper surface of the first panel 20 with an adhesive. The adhesive may be liquid or solid, and known adhesive means may be used without limitation.

Figure 4 shows the connection structure of the integrated structure, which includes the first panel 20 and the support 10 when a plurality of raised floors including the integrated structure of the present invention are connected and constructed. indicates. A plurality of first connection grooves (a) of the first panel 20, preferably two to four, are gathered together to form the first connection groove portion (A). Although not shown in Figure 4, the second connection grooves (a') of the second panel 30 stacked on the upper surface of the first panel 20 are also plural, preferably 2 to 4, forming a second connection. A groove portion (A') is formed.

The first connection groove (A) and the second connection groove (A') may combine a connection member (not shown). Adjacent raised floors are connected through connecting members. The connecting member may be a metallic packing or a non-metallic packing, and may be made of synthetic rubber, natural rubber, leather, paper, fiber, alloy, etc., and is not particularly limited, but is preferably a non-metallic packing to reduce noise, and in particular, synthetic rubber or It is preferable that it is natural rubber.

The connecting member is preferably of a size that fits into the connecting groove without any separation when inserted into the connecting groove. Since the connecting member can be inserted into the connecting groove to connect the double flooring, construction is easy at the construction site and construction efficiency is very excellent.

The method of manufacturing a raised flooring according to an embodiment of the present invention includes the following steps.

(a) mixing a thermoplastic polymer and 30% by weight or more of glass fiber to form a composite composition;

(b) inserting the insert nut and the second panel into the mold;

(c) injecting the composite composition into the mold;

(d) forming by pressing with a press;

In step (a), the thermoplastic polymer may be heated to about 170°C to 320°C and mixed with glass fiber in a molten state. Glass fiber is continuously added to the molten thermoplastic polymer and mixed at a certain ratio to form a composite composition.

In step (b), the insert nut and second panel are inserted into the mold. The mold may be divided into a lower mold and an upper mold, and after inserting the insert nut and the second panel into the position where the insert nut should be inserted and the position where the second panel should be inserted in the lower mold, respectively, the upper mold is The mold can be mounted by covering it.

In step (c), the molten composite composition is injected into the mold. The composite composition is combined with the insert nut and the second panel inserted into the mold and is injected as one piece.

In step (d), the pressure may be about 500 to 1,500 kg/cm ² .

The raised flooring of the present invention is completed through the step of pressing and forming with the press and then cooling.

The description of the thermoplastic polymer, glass fiber, support, first panel, second panel, insert nut, etc. described above applies equally to the manufacturing method of the raised flooring of the present invention and is replaced with the above description.

The present invention will be explained in more detail by examples. However, the following examples only illustrate the present invention, and the content of the present invention is not limited by the following examples.

Example 1

A composite composition of 57% by weight of polyamide (PA) melted at 300°C mixed with 43% by weight of glass fiber (GF) is injected into a mold with an insert nut and a 7mm thick steel panel, and the insert nut is inserted into the support. A double flooring material was manufactured by insert injection so that steel panels were laminated on the upper surface of the integrated structure. The total thickness of the first panel and the steel panel excluding the support in the above-mentioned double flooring material is 50 mm, and the total weight of the double flooring material is 7.2 kg.

Example 2

A composite composition of 60% by weight of polypropylene (PP) melted at 140°C mixed with 40% by weight of glass fiber (GF) is injected into a mold with an insert nut and a 7mm thick steel panel, and the insert nut is inserted into the support. A double flooring material was manufactured by insert injection so that steel panels were laminated on the upper surface of the integrated structure. The total thickness of the first panel and the steel panel excluding the support in the double flooring material is 50 mm, and the total weight of the double flooring material is 8.1 kg.

Example 3

A composite composition of 67% by weight of polypropylene (PP) melted at 140°C mixed with 33% by weight of glass fiber (GF) is injected into a mold with an insert nut and a 7mm thick steel panel, and the insert nut is inserted into the support. A double flooring material was manufactured by insert injection so that steel panels were laminated on the upper surface of the integrated structure. The total thickness of the first panel and the steel panel excluding the support in the above-mentioned double flooring material is 50 mm, and the total weight of the double flooring material is 9.0 kg.

Example 4

A composite composition of 70% by weight of polyamide (PA)/polypropylene (PP) melted at 300°C mixed with 30% by weight of glass fiber (GF) was injected into a mold fitted with an insert nut and a 7mm thick steel panel to form a support. A double flooring material was manufactured by insert injection molding so that an insert nut was inserted and a steel panel was laminated on the upper surface of the integrated structure. The total thickness of the first panel and the steel panel excluding the support in the above-mentioned double flooring material is 50 mm, and the total weight of the double flooring material is 7.6 kg.

Comparative Example 1

The panel was manufactured by mixing fiber reinforced cement with a 20 mm thick steel mesh. A double flooring was manufactured by combining corner lock bolts, rubber gaskets, and supports at the corners of the panel. The total weight of the double flooring is 9.8kg.

<Experimental example>

Examples 1 to 4 evaluate the following items for the support and first panel (integrated structure) formed of a composite composition excluding the steel panel and insert nut.

(1) Yield strength measurement

In Comparative Example 1, the yield strength (MPa) at room temperature was measured according to the ASTM E8M standard.

For the first panel and support of Examples 1 to 4, the yield strength (MPa) at room temperature was measured according to the ASTM D638 standard.

(2) Specific intensity calculation

The yield strength of the double flooring measured above was calculated by dividing it by the density of the double flooring, and the unit was expressed as kNm/kg. ( )

The evaluation results for the raised flooring manufactured in Examples 1 to 4 and Comparative Example 1 are shown in Table 1 below.

division Density (kg/m ³ ) Yield strength (MPa) Specific strength (kNm/kg) Example 1
(PAGF) 1490 210 140.9 Example 2
(PPGF) 1200 103 85.8 Example 3
(PPGF) 1190 87 73.1 Example 4
(PPPAGF) 1260 140 111.1 Comparative Example 1
(STEEL) 7850 278 35.4

The specific strength of the integrated structures included in Examples 1 to 4 of the present invention is 73.1 to 140.9 kNm/kg, which is significantly superior to that of Comparative Example 1, and it can be confirmed that the body is lightweight yet high in strength.

Furthermore, since the raised flooring of the present invention includes a thin steel panel on the upper surface of the integrated structure, the load is distributed by the steel panel and the strength is further improved.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following description will be provided by those skilled in the art in the technical field to which the present invention pertains. Of course, various modifications and variations can be made within the scope of equivalence of the claims.

10: support
11: Attached coupling groove
12: Insert nut
20: first panel
21: Home Department
30: second panel
40: holding
a: first connection groove
a': second connection groove
A: First connection groove
A': Second connection groove
100: Double flooring

Claims (12)

An integrated structure including a first panel parallel to the floor and a support unit integrally coupled to a lower portion of the first panel to space the first panel from the floor; and a second panel laminated on the upper surface of the first panel; Including,
The integrated structure is formed of a composite composition containing more than 30% by weight of glass fiber and a thermoplastic polymer,
The second panel is a steel panel,
The first panel includes a groove portion in an area of 30% to 50% of the area excluding the portion where the support is coupled,
The first panel has a thickness of 20 mm to 100 mm,
The second panel has a thickness of 1 mm to 20 mm,
The specific strength of the integrated structure is 50 kNm/kg to 150 kNm/kg,
The support includes an attached coupling groove,
An insert nut is coupled to the attached coupling groove.
Double flooring.
The method of claim 1, wherein the thermoplastic polymer comprises at least one selected from polypropylene and polyamide.
Double flooring.
The method of claim 1, wherein the composite composition comprises 50% to 70% by weight of a thermoplastic polymer.
Double flooring.
delete delete The method of claim 1, wherein the first panel includes a first connection groove at a corner of the upper surface.
Double flooring.
The method of claim 1, wherein the second panel includes a second connection groove at a corner.
Double flooring.
delete The method of claim 1, comprising an adhesive between the first panel and the second panel.
Double flooring.
delete (a) mixing a thermoplastic polymer and 30% by weight or more of glass fiber to form a composite composition;
(b) inserting the insert nut and the second panel into the mold;
(c) injecting the composite composition into the mold;
(d) Processed by molding by injection and pressing by press, it includes a first panel parallel to the floor formed of the composite composition and a support unit integrally coupled to the lower part of the first panel to space the first panel from the floor. An integrated structure that does; and manufacturing a raised flooring material including a second panel laminated on an upper surface of the first panel;
Including,
The second panel is a steel panel,
The first panel includes a groove portion in an area of 30% to 50% of the area excluding the portion where the support is coupled,
The first panel has a thickness of 20 mm to 100 mm,
The second panel has a thickness of 1 mm to 20 mm,
The specific strength of the integrated structure is 50 kNm/kg to 150 kNm/kg,
The support includes an attached coupling groove to which the insert nut is coupled.
Manufacturing method of raised flooring.
The method of claim 11, wherein the thermoplastic polymer includes at least one of polypropylene and polyamide.
Manufacturing method of raised flooring.