KR102547751B1 - Lower Frame of Decking and Flooring Materials - Google Patents

Abstract

The present invention relates to a lower frame of a deck material and a flooring material, and the lower frame of a deck material and a flooring material according to an embodiment of the present invention includes a floor frame in contact with a floor surface and a first sidewall formed extending from an edge of the floor frame. It includes a frame, and is formed by extending from the edge of the upper frame and the upper frame having a lower body portion forming a first screw thread on the first side wall frame, and a hook portion positioned on the upper side of the bottom frame to which a bar-shaped joist is fastened. It includes a second side wall frame, and the second screw thread on the second side wall frame may include an upper body portion whose height is adjusted by operating in engagement with the first screw thread.

Description

Lower frame of decking and flooring materials {Lower Frame of Decking and Flooring Materials}

The present invention relates to a lower frame of a deck material and a flooring material, and more particularly, by supplementing the disadvantages of a lower frame introducing a pedestal system in the field of a system floor or deck of a flooring material, for example, flooring construction and deck construction It relates to a lower frame of a deck material and a flooring material that can be used for both.

In general, a clean room is installed in an industrial facility that manufactures semiconductor devices, etc., which are highly affected by foreign substances, or in a computer room where control is performed using expensive computers, etc., to prevent the equipment from being exposed to foreign substances. In order to secure passage space through which cables and connectors connected to various equipment pass, the floor consists of an access floor, and the access floor is supported by a pedestal located on the foundation floor. In addition, even in the case of indoor gyms, there is a trend to use a lower frame similar to this pedestal.

Conventionally, a similar product has been sold under the name of flooring system, that is, a flooring system floor frame, and a lower frame introduced with a pedestal system exists in the deck field as well. Parquet flooring is a building material made of various materials used for the floor of a building. Deck materials are mainly used for deck materials for high-end houses and are used for wall or interior finishes.

However, most of the system floorboards used in flooring are made of steel and are heavy, and height adjustment can be performed as a simple task.

In addition, when the entire floorboard is raised due to the deformation of the flooring material after the flooring is installed, there is a problem that the existing products are loosened or the fixing force with the floor is weak and lifted together.

On the other hand, the deck lower frame has a problem in that it is difficult to construct it indoors or in a corner space by installing a post (post) and manufacturing a deck from a plate material and putting it on top.

Korean Registered Patent Publication No. 10-0772555 (2007.10.26) Korea Patent Registration No. 10-1511902 (2015.04.07) Korean Registered Patent Publication No. 10-1512457 (2015.04.09) Korea Patent Registration No. 10-1256329 (2013.04.12) Korea Patent Registration No. 10-1426758 (2014.07.30)

The embodiment of the present invention compensates for the disadvantages of the lower frame introducing the pedestal system in the field of floor system floor or deck, for example, to provide a deck material and a lower frame of flooring material that can be used for both flooring construction and deck construction has its purpose.

A lower frame of a deck material and a flooring material according to an embodiment of the present invention includes a floor frame contacting a floor surface and a first side wall frame extending upward from an edge of the floor frame, A lower body portion having a plurality of first screw threads formed on an inner wall at a first interval; and an upper frame having a fastening portion on an upper surface to which a bar-shaped joist is fastened, and a second side wall frame extending downward from an edge of the upper frame, wherein the outer wall of the second side wall frame has a second side wall frame. An upper body portion in which a plurality of second screw threads are formed at intervals of 2, wherein the upper body portion and the lower body portion are formed of a plastic material, and the second screw thread portion of the upper body portion is formed of the lower body portion. It may be fastened by rotating in one direction in a state of being inserted into the first spaced part so that the second screw thread engages with the first screw thread.

The first interval may be larger than the second interval.

The first screw thread and the second screw thread may be formed by four each.

The fastening part may include a first fastening part and a second fastening part formed facing each other, and an inner wall of the second fastening part may include a ring part extending from an upper side of the inner wall and formed downward.

The first fastening part may include an inner wall having a vertical surface and a first screw hole for fastening a first screw to the joist; and a groove formed concavely in the vertical surface to engage a protrusion formed on one side of the lower part in the direction of the long axis of the joist.

A bottom through hole may be formed in the bottom frame, and a honeycomb contact portion may be formed on a lower surface of the bottom frame.

A breakage preventing part for preventing damage to the lower body due to a lateral load may be formed on an outer wall of the first sidewall frame.

A plurality of upper through-holes may be formed at a portion of the upper frame in contact with the joist.

A second screw hole for fixing a second screw to the first side wall frame may be formed in the upper frame.

The lower frame further includes a socket portion interposed between the lower body portion and the upper body portion and extending in height, and a third screw thread engaged with the first screw thread is formed on an outer wall of the socket portion, and the socket portion A fourth screw thread engaged with the second screw thread may be formed on the inner wall.

According to an embodiment of the present invention, height adjustment is simple, fixing work is simple, and loosening will not occur.

In addition, in the embodiment of the present invention, the product will not be lifted through adhesion between the floor and the product, and the fixation will not be released because the height is not adjusted by turning.

Furthermore, in the embodiment of the present invention, even if it is not a dedicated joist used for construction, wood and square tubes can be used, and joists of various standards can be applied.

In addition, the embodiment of the present invention can increase the height as necessary by using a separate socket and install a dedicated joist, so that various deck constructions can be possible.

In addition, the embodiment of the present invention has a honeycomb-shaped space on the lower bottom surface so that there is no water film phenomenon when the bottom is bonded, and the adhesive strength can be excellent when bonded by compression.

In the embodiment of the present invention, when combining joists made of metal such as aluminum, it is possible to prevent aquaplaning and to prevent a whitening site by promoting moisture escape, and also to prevent damage due to lateral load through a triangular structure side support. You will be able to.

1 is a perspective view and cross-sectional view of a lower frame according to an embodiment of the present invention;
Figure 2 is an external and internal perspective view of the upper body portion of Figure 1;
Figure 3 is an external and internal perspective view of the lower body portion of Figure 1;
Figure 4 is a perspective view illustrating the structure of a joist coupled to the lower frame of Figure 1;
5 is a view showing a connector for connecting a plurality of joists to each other, and
6 is a view showing a modified example of the lower frame of FIG. 1;

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, in the description of the present invention, when the technical idea of the present invention is blurred or unclear due to the detailed description of the known configuration, the description of the above known configuration will be omitted.

1 is a perspective and cross-sectional view of a lower frame according to an embodiment of the present invention, FIG. 2 is an external and internal perspective view of the upper body portion of FIG. 1, and FIG. 3 is an external and internal perspective view of the lower body portion of FIG.

As shown in FIGS. 1 to 3, the lower frame 100 according to the embodiment of the present invention is a lower frame of a deck material and a flooring material, and includes an upper body portion 110 and a lower body portion 120. do.

Here, the upper body portion 110 and the lower body portion 120 are formed of a poly-based material such as plastic, and recycled plastic may be used. Also, the upper body portion 110 and the lower body portion 120 may be formed by injection molding. Of course, since the material and manufacturing method can be made in various ways, the embodiment of the present invention will not be particularly limited to any one form. For example, the upper body portion 110 and the lower body portion 120 may be formed of any metal material, and may be manufactured in a form of coating a poly-based material on the outside of the metal material.

Of course, in the embodiment of the present invention, the upper body portion 110 and the lower body portion 120 are formed in a circular shape due to the assumption of a screw thread, but if the body portion is formed in a square shape, the upper body portion ( 110) and the lower body portion 120 are coupled in a slide form along a valley or groove similar to a screw thread formed perpendicular to the wall surface, and then rotated in one direction to form a specific height. Therefore, a screw thread is used. It will not be particularly limited to whether or not it is formed in the form of a slide.

As can be seen in Figures 1 and 2, the upper body portion 110 is a horizontal form with respect to the bottom surface, more precisely, the upper frame (or The first frame) 111, the fastening part 112 formed in the central portion of the upper frame 111 and fastened to a bar-shaped wood or metal joist such as aluminum at one side, and the upper frame ( 111) and a side wall frame 113 extending vertically from the edge toward the bottom surface.

The upper frame 110 forms a fastening part 112 at a central portion, and the fastening part 112 forms a first fastening part and a second fastening part formed in a protruding shape facing each other. Although the first fastening part and the second fastening part take on the shape of a triangular support, this is only in consideration of aspects such as manufacturing cost, and it does not matter if they take on a rectangular shape. Its central portion is formed in a penetrating shape.

1 and 2, the first fastening part and the second fastening part are formed in the shape of a triangular prism, and the inner wall of the first fastening part and the second fastening part facing each other are formed flat. Due to such a flat structure, when the joist is fastened between the first fastening part and the second fastening part from the upper side, the fastening is easily performed along the smooth surface.

Above all, a groove 112c is formed on the lower side of the inner wall having a vertical surface of the first fastening part of the fastening part 112 according to the embodiment of the present invention, and a hook 112b is formed on the inner wall of the second fastening part. do. It is preferable that the height of the groove portion 112c and the height of the space opened to the outside by the ring 112b match each other. This coincides with the height of the protrusions formed in the direction of the long axis on both sides of the joist. The height is formed to 3 mm according to an embodiment of the present invention, but will not be particularly limited thereto. Therefore, when the joist is fastened to the fastening part 112, the protrusion on one side is fastened to the groove part 112c and the protruding part on the other side is fastened to the ring 112c, so that a strong coupling occurs. Of course, even when the joist is released from the coupling part 112, the construction work is easy by pressing the ring 112b to separate it. The upper frame 110 may have a diameter of about 140 mm.

The ring 112b extends from the upper side of the inner wall of the second fastening portion and is bent downward. Through this, when the joist is fastened from the upper side, it is fastened to the protrusion formed on one side of the joist, so that the once fastened joist does not easily escape from the fastening part 112. In addition, a first screw hole 112a for fastening a screw is formed on the inner wall of the first coupling part. Therefore, one side of the bar-shaped joist is fixed by the hook 112b of the second fastening part, and the other side is fixed by the first screw hole 112a of the first fastening part, so that the joist and the lower frame 110 are firmly fastened. this will be done Of course, it can be seen that the groove part 112c formed on the lower part of the inner wall of the first fastening part also contributes to this.

In addition, on the upper frame 111 of the upper body portion 110, when a joist made of a metal material such as aluminum as well as a joist made of wood is fastened, for example, a structure for preventing whitening in the case of an aluminum joist is formed. Prevent contamination of metal joists. In the embodiment of the present invention, a plurality of upper through-holes 111a are formed in the lower part of the upper frame 111 that comes into contact with the joists when the joists are fastened. Here, the upper through hole 111a may be replaced with a through groove. The upper through hole 111a prevents a water film phenomenon when combined with a joist, and promotes moisture escape to prevent whitening of aluminum or the like. 1 and 2 show four upper through holes 111a facing each other. Two are formed on one side and the other side, respectively. Of course, these numbers can be changed at any time.

Furthermore, one side of the upper frame 111 further includes a second screw hole 111b for firmly coupling the upper body portion 110 to the lower body portion 120 . More precisely, the fastening of the upper body portion 110 and the lower body portion 120 is prevented from loosening through the screw fixing of the second screw hole 111b. The upper body portion 110 and the lower body portion 120 are fastened to each other through threads formed on the side walls of each other to adjust the height, but in addition to the coupling of the threads, the upper body portion 110 through the second screw hole 111b. ) and the lower body portion 120 are strengthened.

The side wall frame 113 extending downward from the edge of the upper frame 111 may be referred to as a second side wall frame when the side wall frame 122 of the lower body 120 is referred to as a first side wall frame, , If the side wall frame 122 of the lower body portion 120 is named the second side wall frame, it may be named the first side wall frame. As can be seen in Figure 2, the outer wall of the side wall frame 113 of the upper body portion 110 is formed with external threads formed in four areas at second intervals. Here, the second spacing refers to a spacing between regions where screw threads are formed. Of course, the sidewall area of the sidewall frame 113 may be divided into 8 parts in a vertical direction to form external threads in the 4 areas. The screw thread here is also named a second screw thread when the screw thread of the lower body portion 120 is named as the first screw thread, and is named as the first screw thread when the screw thread of the lower body portion 110 is named as the second screw thread. Although the threads are formed by dividing them into a plurality of areas on the side wall frame 113, it is also possible to form them on the entire (body) surface. However, since it is designed in consideration of manufacturing cost or product damage due to lateral load, threads are formed in four areas in the embodiment of the present invention, which can be adjusted as much as desired.

Above all, the separate areas of the screw thread are formed to facilitate fastening and height adjustment of the screw thread formed in the lower body portion 120 located at the bottom. In other words, after inserting the concave portion (ie, the second interval portion) without a thread on the side wall frame 113 into the convex thread region of the lower body portion 120 by a desired height, and then rotating it in one direction, fastening at the desired height. This structure is formed in order to make this smooth. Since the structure of the screw thread can be determined in consideration of the convenience of fastening, etc., the embodiment of the present invention will not be particularly limited to the above form.

On the other hand, the lower body portion 120 is coupled to the upper body portion 110 through a screw thread, and a bottom (or lower) frame 121 that contacts the bottom surface and is formed horizontally with respect to the bottom surface, and the bottom frame 121 It is configured to include a side wall frame 122 formed extending upward from the edge of the. Here, the side wall frame 122 may be referred to as a first side wall frame or a second side wall frame. The lower surface of the bottom frame 121 prevents slipping of the bottom surface and has a honeycomb-shaped space with respect to the lower bottom surface so that there is no water film phenomenon when bonding the bottom surface, and the contact portion 121b is provided so that the adhesive strength is increased when bonding is performed by compression. include In addition, the bottom frame 121 includes a bottom through hole 121a at a central portion. Air inside the lower body 120 can be discharged to the outside through the bottom through-hole 121a. The bottom frame 121 may have a diameter of about 140 mm. In a state where the upper body part 110 and the lower body part 120 are completely locked, the height of the upper frame 111 and the bottom frame 121 excluding the thickness may be approximately 55 mm. The height of the fastening part 112 is formed to about 23 mm excluding the thickness (eg, 5 mm) of the upper frame 110 .

A separate adhesive member may be installed on the floor during installation, that is, construction of the lower frame 100 according to an embodiment of the present invention, which is formed separately from the lower frame 100. In other words, it may be installed separately from the contact portion 121b of the lower body portion 120 . The honeycomb shape of the bottom frame 121 may be formed of plastic, and when the lower frame 100 is installed on the adhesive member, adhesion due to the honeycomb shape may be improved. In other words, since the contact portion 121b may be formed of plastic by integrating the honeycomb shape with the body during the manufacture of the bottom frame 121, more precisely, during the manufacture of the lower body portion 120, in the embodiment of the present invention, either one It will not be particularly limited to the form of.

The side wall frame 122 has a threaded portion 122a formed on the inner wall and a breakage preventing portion 122b formed on the outer wall to prevent damage to the product due to lateral load. The screw thread portion 122a forms a first screw thread or a second screw thread. The breakage prevention part 122b forms a side support in the form of a triangular structure on an outer wall.

3, threaded portions 122a are formed in four regions at first intervals on the inner wall. Here, the first distance means the distance between the region where the screw thread portion 122a is formed and the region. The threaded portion 122a is formed at a portion corresponding to the second spacing of the upper body portion 110 . Of course, when the outer wall area of the upper body portion 110 is divided into eight parts in a vertical direction to form externally formed screw threads in four areas, the inner wall is divided into eight parts in a vertical direction so that the threaded portion of the lower body portion 120 is symmetrical thereto. It can be formed in four areas. Each threaded portion 122a is formed in a form protruding from the inner wall, and is engaged with the threaded portion of the upper body portion 110 inserted into the left and right concave regions (ie, the first gap portion) during rotation, and is fastened while engaging with each other. height can be adjusted via A screw hole for screw fastening is formed on the upper portion of the side wall.

2 and 3, it can be seen that the width of the thread of the upper body portion 110 is larger than the width of the thread of the lower body portion 120 (this is the first interval of the lower body portion 120). It has the same meaning as being larger than the second interval of the upper body portion 110). Forming in this way can be seen as to make the fastening easier, and to maintain the fastening force even if it returns little by little due to impact during use. However, since it is possible to form and use the same width based on construction experience, the embodiment of the present invention will not be particularly limited to any one form.

As a result of the above configuration, the embodiment of the present invention has a simple fixing work for simple height adjustment and does not cause loosening compared to the prior art. In addition, it is not lifted through the adhesion between the floor and the product, and the fixation is not released because the height is not adjusted by turning. In addition, it is possible to prevent damage to the product due to lateral load, and even if a water film phenomenon is eliminated when bonding the floor by placing a honeycomb space, it is possible to increase the adhesive force when bonding by compressing.

FIG. 4 is a perspective view illustrating the structure of joists coupled to the lower frame of FIG. 1 and shows a part cut, and FIG. 5 is a view showing a connector connecting a plurality of joists to each other.

As shown in FIG. 4, the joist 400 according to an embodiment of the present invention is a joist made of metal, plastic, or wood, and has a main body portion 420 shaped like a pipe forming a hollow in the center, A bar-shaped first protrusion 421 formed vertically on the left and right sides of the main body portion 420, and a bar-shaped second protrusion 422 formed on the left and right sides from the upper side of the main body portion 420, respectively. do.

Here, the first protrusions 421 respectively formed from the lower part of the main body 420 to both sides, more precisely, to the outer walls of both sides, are inserted into the fastening part 112 as seen in FIGS. 1 and 2 to form the first fastening part. It is fastened by the groove part 112c formed on the lower side of the inner wall and the hook part 112b of the second fastening part. Accordingly, the lower frame 100 and the joist 400 are firmly fastened. Of course, as mentioned above, a screw hole is formed on the inner wall of the first fastening part, through which the joist 400 can be more firmly fastened. The height and width of the first protrusion 421 are related to the heights of the groove part 112c formed on the lower side of the inner wall of the first fastening part and the hook part 112b of the second fastening part. For example, it may be formed to about 3 mm.

The left first protrusion 421 of the joist 400 is inserted into the left side, that is, the groove 112c formed at the lower end of the first fastening part, and the right first protrusion 421 of the joist 400 has elasticity of the second fastening part. Fastening is made in such a way that it passes through the ring portion 112b and is inserted into the groove at the bottom. This may be referred to as a click method. Since the elastic ring part 112b is pressed while fastening, the joist 400 made of wood or aluminum is fixed to some extent, and when screwed therein, it is more firmly fixed.

In this way, the lower frame 100 according to the embodiment of the present invention is installed on the floor surface of various places such as indoor and outdoor, for example, an indoor gym, and is adjacent to the upper side of the lower frame 100 through the joist 400 By combining with the lower frame 100, it is possible to finish the foundation for finishing the deck material or flooring, that is, the flooring material, to the upper side of the joist 400.

As seen in FIG. 4 , a rubber pad may be formed between the second protrusions 422 formed on the upper side of the main body 420 . After providing the rubber pad, it is possible to finish the construction by finishing the plywood on the upper side and the flooring material on the plywood.

FIG. 5 shows a connector 500 inserted into the joist 400 shown in FIG. 4 to connect different joists 400 to each other. Of course, the connector 500 is configured to be inserted into the inner hollow of the main body portion 420 of FIG. 4 and forms a plurality of protrusions on the outer surface for firm fastening. In addition, the connector 500 may include a region separating portion 520 for occupying an equal area when one side of the first joist and one side of the second joist are connected to each other. This is to maintain a balance of power by allocating equal areas to each other.

Protrusions 511 are formed on the outer side of the connector body 510 inserted into the inner hollow of the main body 420 of the first joist with respect to the region separating portion 520, up, down, left and right, and the second joist Up, down, left and right protrusions 511 are also formed on the outside of the connector body 510 inserted into the inner hollow of the main body 420. The connector 500 may be formed of a material such as rubber or plastic, and is firmly fastened by a plurality of externally formed protrusions to fasten the lower frame 100 formed on the bottom surface and the upper side of the lower frame 100. It is possible to solidify the overall fastening of the joist 400 to be.

Although the connector 550 according to the embodiment of the present invention is exemplified by forming two protrusions 511 on the outer wall of the connector body 510, up, down, left and right, these can be changed as much as possible according to construction experience. , will not be particularly limited to any one form.

6 is a view showing a modified example of the lower frame of FIG. 1;

As shown in FIG. 6, the lower frame 600 according to another embodiment of the present invention is a socket fastened between the upper body portion 110 and the lower body portion 120 in the lower frame 100 of FIG. It is configured to further include a unit 130.

For example, as shown in FIG. 1, when the desired height cannot be formed during construction only by fastening the upper body portion 110 and the lower body portion 120, the desired height is formed by inserting the socket portion 130 therebetween. can do. Of course, it is also possible to increase the height of the side walls of the upper body part 110 and the lower body part 120 in FIG. 1 in order not to use the socket part 130 . However, in this case, the unit cost of manufacturing the product may increase, and rather, there may be restrictions on the definiteness of construction. Therefore, forming the height of the side wall low and fastening the socket portion 130 may help expandability of construction.

The socket portion 130 has a screw thread 132a protruding outward from the outer wall of the lower frame 132 and a screw thread 131a protruding from the inner wall to the center of the inner wall of the upper frame 131. has been The thread 132a of the lower frame 132 is formed to engage with the thread 122a of the lower body portion 120, and the thread 131a of the upper frame 131 is the thread 113a of the upper body portion 110. It is formed symmetrically so as to engage with. If the threads 113a and 122a of the upper body portion 110 and the lower body portion 120 are formed in four divided areas when divided into eight, the socket portion 130 is also formed on the inner wall of the upper frame 131. When is divided into 8 in the vertical direction, screw threads 131a are formed in 4 divided areas, and when divided into 8, similarly, on the outside of the lower frame 132, screw threads 132a are formed in 4 divided areas. . This is to facilitate the fastening of the upper body portion 110 and the lower body portion 120 and the socket portion 130, as mentioned above, the thread fastening method of the upper body portion 110 and the lower body portion 120 It will be natural for the structure of the socket unit 130 to change when it is changed.

As a result of the above configuration, during construction of the lower frame 600, desired height expansion may be achieved in addition to the effects mentioned in relation to FIG. 1. For example, although the upper body portion 110 and the lower body portion 120 are made of a plastic material, it is also possible to secure mounting stability of the product by forming only the socket portion 130 from a metal material. Of course, in the embodiment of the present invention, it is preferable to form all of the plastic materials, but this can be changed as much as possible according to the characteristics of the construction site.

In the above, specific embodiments of the present invention have been described in detail with reference to the drawings, but since the above embodiments are merely examples to make the present invention easier to understand, those skilled in the art will understand the technical skills of the present invention. It is obvious that it will be possible to carry out various modifications within the scope of the idea. Therefore, it will be said that such modifications fall within the scope of the present invention as described in the claims.

110: upper body part 111: upper frame
112: fastening part 113: second side wall frame
120: lower body part 121: bottom frame (or lower frame)
122: first side wall frame 130: socket portion

Claims (10)

A lower body including a bottom frame in contact with a bottom surface and a first side wall frame extending upward from an edge of the bottom frame, wherein a plurality of first screw threads are formed on an inner wall of the first side wall frame at a first interval. wealth; and
An upper frame having a fastening part to which a bar-shaped joist is fastened on an upper surface, and a second side wall frame extending downward from an edge of the upper frame, wherein the outer wall of the second side wall frame has a second An upper body portion in which a plurality of second threads are formed at intervals; including,
The upper body portion and the lower body portion,
It is formed of a plastic material, and the second screw thread of the upper body portion is rotated in one direction in a state of being inserted into the first spaced portion of the lower body portion so that the second screw thread engages with the first screw thread and is fastened ,
The fastening part includes a first fastening part and a second fastening part formed facing each other, the first fastening part includes an inner wall having a vertical surface and a groove formed concavely in the vertical surface, and the inner wall of the second fastening part includes the It consists of a ring part having elasticity extending from the upper side of the inner wall and formed to the lower side, and the protrusions formed on both sides of the lower part in the direction of the long axis of the joist are clicked into the groove and the groove at the bottom of the ring part,
A plurality of upper through-holes are formed in a portion of the upper frame in contact with the joist, a central portion between the first fastening part and the second fastening part is formed in a penetrating shape, and a bottom through-hole is formed in the bottom frame. The lower frame of the flooring material to be. According to claim 1,
The lower frame of the flooring material in which the first interval is formed larger than the second interval. According to claim 1,
The lower frame of the flooring material in which the first screw thread and the second screw thread are formed by four each. delete According to claim 1,
The lower frame of the flooring material in which a first screw hole for fastening a first screw to the joist is formed in the first fastening part. According to claim 1,
A lower frame of the flooring material in which a honeycomb contact portion is formed on the lower surface of the floor frame. According to claim 1,
The lower frame of the flooring material is formed on the outer wall of the first side wall frame to prevent damage to the lower body portion due to lateral load. delete According to claim 1,
The lower frame of the flooring material is formed in the upper frame with a second screw hole for fixing a second screw to the first side wall frame. According to claim 1,
It further includes; a socket portion extending in height by being inserted between the lower body portion and the upper body portion;
The lower frame of the flooring material, wherein a third screw thread engaged with the first screw thread is formed on the outer wall of the socket portion, and a fourth screw thread engaged with the second screw thread is formed on the inner wall of the socket portion.

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