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CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is a divisional application of U.S. application Ser. No. 14/843,222 filed on Sep. 2, 2015, which claims priority under 35 U.S.C. §119(a) to Korean Patent Application No. 10-2014-0116215 filed on Sep. 2, 2014, and Korean Patent Application No. 10-2014-0153727 filed on Nov. 6, 2014, the contents of which are hereby incorporated by reference in their entirety. 
     
    
     BACKGROUND 
       [0002]    The present disclosure relates to a construction panel assembly which may be assembled and disassembled to partition an indoor space of a building and a construction method using the same, and more particularly, to a construction panel assembly and a construction method using the same, in which a flat panel is mounted on a structure formed in such a way that a main frame and an auxiliary frame are inserted into each other. Thus, materials may be reused, and the generation of waste may be maximally prevented. 
         [0003]    In general, to construct a typical building, a base framework is built through a method in which concrete is formed in a concrete form or steel beams are installed based on design specifications, and then, indoor or outdoor portions such as roofs, ceilings, walls and floors are built and finished. 
         [0004]    Various kinds of buildings are used by partitioning one large indoor space into several small spaces for user convenience without damaging the existing structure of a building, and walls for partitioning the space are classified into fixed walls and assembly walls. 
         [0005]    Fixed walls include masonry walls which need masonry work, plastering work, painting work or wallpapering work to be performed, and wood partitioning walls which need carpentry work, painting or wallpapering work to be performed. Since multiple processes need to be combined to complete a fixed wall, recently, an assembly wall, which is produced as a single panel formed through several processes and assembled, is popular and is being widely used in construction. 
         [0006]    For construction panels, various functional or decorative characteristics such as ease of construction, stiffness and supporting strength, including thermal insulation, fire resistance, waterproofing, and appearance, are required. Recently, various types of construction materials have been widely developed to satisfy these characteristics. 
         [0007]    Until now, since construction panels have also been constructed in a fixed type with respect to non-bearing walls, which are not bearing walls, when a situation arises in which a wall needs to be changed, the reuse of existing materials is almost impossible because the wall is completely removed and then new materials are installed. 
         [0008]    For example, although a steel wall called a steel gypsum panel (SGP) is configured to be assemblable and disassemblable, this steel wall may not be applied to a whole pane of glass wall or a wall including a gypsum panel which is painted or wallpapered. Although this steel wall is separated into a structure material and a finishing material, this steel wall has the disadvantages in that it should be only used for SGP materials and does not sufficiently block noise, etc. because it does not have a shielded structure. 
         [0009]    Moreover, also in construction methods, since finishing materials are coupled to structure materials by using screws, etc., screw heads are exposed. Since an additional packing should be inserted to compensate for this drawback, the consistent connection of walls, such as painting or wallpapering becomes impossible. 
         [0010]    In relation to the installation of construction panels as described above, for example, Korean Patent No. 0695700 discloses a technique which is highly effective for noise blocking and heat insulation, shows noise blocking and fire resisting properties also for studs that form the coupling between panels, has a simple structure allowing for the mutual coupling of parts so as to make assembly convenient, and also allows for assembled firmness. However, since this is nothing but a technique for continuously coupling panels to each other by installing concave-convex portions at both ends with complex structures of the panels themselves, the technique may not be applied to the construction of a whole pane of glass or a whole wall. 
         [0011]    Also, Korean Patent No. 0838961 discloses a technique, in which a modular wall is coupled to a fixing rod by sliding into the fixing rod after the fixing rod is screwed to a ceiling and a floor such that the wall may be simply and quickly installed and removed while minimizing damage to the ceiling and the floor, and thus improve ease of maintenance and repair. However, since the structure of the fixing stud for constructing a wall is complicated, and an elastic body such as a spring or an additional support plate is required to be assembled, a rise in price is caused by the manufacturing of additional materials, and the construction process becomes difficult. 
         [0012]    A typical assembly structure of a construction panel will be described below as an example. As illustrated in the accompanying  FIGS. 1 and 2 , a steel stud  130  for a non-bearing wall is installed between a floor  110  and a ceiling  120  for constructing a typical drywall  100 . 
         [0013]    The steel stud  130  includes upper and lower track members  132  and  134  coupled to the sides of the floor  110  and the ceiling  120  by using an anchor bolt or the like (not shown) and stud members  136  functioning as a plurality of vertical beams assembled between the track members. 
         [0014]    Also, the stud members  136  are fixed by a fixing member  138   a  horizontally disposed between the stud members  136  and a connection member  138   b  disposed to continuously extend in a longitudinal direction thereof, and concurrently, are finally are bound by a finishing material such as gypsum board  140 , and the stud members  136  and the upper and lower track members  132  and  134  are coupled by screws  142 . 
         [0015]    Accordingly, as illustrated in  FIG. 2 , since the stud members  136  are fastened by the screws  142  from the outside of the track members after the stud members  136  are inserted between the track members  132  and  134  in the case of the typical drywall  100 , head portions of the screws  142  protrude more than planes of the track members. 
         [0016]    As a result, in the case of the typical wall  100 , there is a limitation in that the process of installing the finishing member  140  after installing the steel stud  130  is interrupted by the head portions of the screws, or a space is generated in the process. 
         [0017]    Furthermore, since the gypsum boards  140  should be finally installed at both sides of the steel stud  130 , respectively, the wall becomes thicker, it is cumbersome to perform multiple stages of screw fastening, and it is also undesirable in the aspects of overall material cost or practical use. 
       SUMMARY 
       [0018]    Embodiments provide a construction panel assembly and a construction method using the same, which are applicable to a detachable method capable of assembling and disassembling almost all walls as well as a typical glass wall or gypsum wall, and also allow materials to be reused, so that the generation of construction waste may be minimized. 
         [0019]    Embodiments also provide a construction panel assembly and a construction method using the same, in which structure materials and finishing materials that constitute a wall structure may be firmly fixed to each other even without using separate screws, and the construction thereof is very simple such that overall costs may be greatly reduced. 
         [0020]    Embodiments also provide a construction panel assembly and a construction method using the same, in which various kinds of wires are not exposed to the outside by using structure materials and finishing materials that constitute a wall structure, such that an indoor space may be more cleanly used. 
         [0021]    In one embodiment, a construction panel assembly includes: a main frame disposed in a mutually opposed arrangement on a wall surface at a predetermined position determined according to design specifications; an auxiliary frame inserted into the main frame to define a structure; a flat panel mounted on the structure to partition a space; and a finishing member for shielding a connection portion of the main frame and the auxiliary frame. 
         [0022]    The main frame may include a first main frame; the auxiliary frame may include a flat panel fixing member inserted into the first main frame; and the finishing member may include a molding and a washboard for shielding the connection portion of the first main frame and the flat panel fixing member. The flat panel may be mounted between the first main frame and the flat panel fixing member to partition a space, the first main frame may include body support members, flat panel support members, flat panel guide members, washboard insertion protrusions, washboard insertion grooves, and support member connection protrusions, which are formed at both end portions thereof, and the molding may be inserted into a molding insertion groove defined by the body support members and the flat panel support members formed at both end portions of the first main frame. The flat panel fixing member may have a support member connection groove coupled to the first main frame and formed at one side end thereof. The flat panel may be inserted into a gap defined by the first main frame and the flat panel fixing member and defines a wall structure. The molding and the washboard may be fixedly coupled to an insertion protrusion and a groove formed in the first main frame and the flat panel fixing member and also insertedly installed so as to shield a connection portion of the first main frame and the flat panel fixing member. 
         [0023]    Gasket fixing protrusions may be formed in the body support members and the flat panel support members of the first main frame such that the molding integrated with a gasket may consolidate coupling after being inserted into the molding insertion groove. 
         [0024]    The washboard may be inserted into the washboard insertion protrusions and the washboard insertion grooves which are formed in the first main frame and the flat panel fixing member, and then, a washboard fixing member may consolidate coupling to a floor. 
         [0025]    The main frame may include a second main frame; the auxiliary frame may include an intermediate frame inserted into the second main frame; and the finishing member may include a finishing cover for shielding a connection portion of the second main frame and the intermediate frame, wherein the flat panel may be mounted between the intermediate frames to partition a space; the second main frame may include a mounting groove formed in a central portion thereof and a support member including openings at both sides of the mounting groove; the intermediate frame may include a protrusion portion inserted into the mounting groove of the second main frame and reinforcement members formed at both sides of the protrusion portion; the flat panel may be configured to define a wall structure by being inserted into the insertion groove of the intermediate frame; the finishing cover may be insertedly installed so as to simultaneously cover the support member of the second main frame and the reinforcement member of the intermediate frame, and may be configured to maintain a mutually assembled state through a fixing member interposed between the second main frame and the intermediate frame; and the fixing member may include a horizontal body and vertical bodies integrally formed on upper and lower surfaces of the horizontal body. 
         [0026]    The second main frame may include a reinforcement protrusion integrally formed on a bottom surface thereof such that a gap may be maintained when being coupled to a floor. 
         [0027]    A groove may be formed and caulked between the second main frame and the finishing cover. 
         [0028]    The second main frame and the intermediate frame may include wire insertion grooves through which a wire passes. 
         [0029]    In another embodiment, provided is a method of constructing a construction panel assembly applicable to a ceiling, a wall structure or a floor material which partitions a space of a building, the method including: marking a reference line on a wall surface at a predetermined position based on design specifications; disposing and fixing a first main frame along the reference line; and supporting a flat panel by integrally coupling flat panel fixing member by using a support member connection protrusion formed in the first main frame and a concave-convex structure of a support member connection groove formed in the flat panel fixing member after placing the flat panel on the first main frame. 
         [0030]    The method of constructing a construction panel assembly may further include inserting and assembling a molding into a molding insertion groove defined by body support members and flat panel support members at both ends of the first main frame. 
         [0031]    The method of constructing a construction panel assembly may further include inserting and assembling a washboard into a washboard insertion protrusion and a wash board insertion groove, which are formed on the first main frame and the flat panel fixing member. 
         [0032]    The method of constructing a construction panel assembly may further include interposing connection frames on both sides of the flat panel fixed by the first main frame and the flat panel fixing member, and assembling the connection frames to a post frame. 
         [0033]    The method of constructing a construction panel assembly may further include assembling a wall structure by inserting a protrusion formed in the connection frame into a convex groove formed in the post frame. 
         [0034]    The method of constructing a construction panel assembly may further include freely assembling a wall structure in a shape of a character such as “L”, “T”, and “+” by using the post frame. 
         [0035]    In another embodiment, provided is a method of constructing a construction panel assembly applicable to a ceiling, a wall structure or a floor material which partitions a space of a building, the method including: marking a reference line on a wall surface at a predetermined position based on design specifications; disposing and fixing a second main frame along the reference line; inserting and coupling an insertion groove formed in the intermediate frame into a coupling portion of the flat panel; inserting and assembling both ends of the intermediate frame to which the flat panel is coupled into a mounting groove formed in the second main frame; and interposing a fixing member, which includes a horizontal body and vertical bodies integrally formed on upper and lower surfaces of the horizontal body respectively, between the second main frame and the intermediate frame while both ends of the intermediate frame are inserted into the mounting groove of the second main frame so as to maintain a mutually assembled state. 
         [0036]    The method of constructing a construction panel assembly may further include interposing a connection frame on a vertical surface after mounting the intermediate frame on upper and lower ends of the flat panel, and assembling the connection frame to the post frame. 
         [0037]    The method of constructing a construction panel assembly may further include assembling all wall structures to define a right angle or 180 degrees between the all wall structures by using the post frame. 
         [0038]    The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features will be apparent from the description and drawings, and from the claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0039]      FIG. 1  is a perspective view illustrating a drywall using a typical steel stud. 
           [0040]      FIG. 2  is a configuration diagram illustrating an assembled state of the drywall illustrated in  FIG. 1 . 
           [0041]      FIG. 3  is an overall perspective view illustrating a construction panel assembly according to a first embodiment. 
           [0042]      FIG. 4  is a perspective view illustrating each member of a construction panel assembly according to the first embodiment. 
           [0043]      FIG. 5  is a view illustrating an embodiment of the formation of a wall structure in a construction panel assembly according to the first embodiment. 
           [0044]      FIG. 6  is an overall perspective view illustrating a construction panel assembly according to a second embodiment. 
           [0045]      FIG. 7  is a perspective view illustrating a state in which a finishing cover is detached from a construction panel assembly according to the second embodiment. 
           [0046]      FIG. 8  is a perspective view illustrating a state in which main and intermediate frames are detached from a construction panel assembly according to the second embodiment. 
           [0047]      FIG. 9  is a cross-sectional view illustrating a state in which a flat panel is assembled in a construction panel assembly according to the second embodiment. 
           [0048]      FIG. 10  is a view illustrating a state in which each frame and finishing panel of a construction panel assembly according to the second embodiment are disassembled. 
           [0049]      FIG. 11  is a view illustrating an embodiment in which a wall structure is installed by using a column post frame. 
       
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       [0050]    Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. 
         [0051]    Prior to the detailed description of the present disclosure, particular structures or the functional descriptions are only exemplary for the purpose of describing embodiments according to the concepts of present invention, and the embodiments according to the concepts of present invention may be implemented in various forms and shall not be interpreted as limiting the embodiments described in this specification. 
         [0052]    Also, embodiments may have various modifications made thereto and may have many different forms according to the concepts of the present invention. Thus specific embodiments are provided as examples in the drawings and are described in detail in this specification. 
         [0053]    The present disclosure relates to a construction panel assembly which may be assembled and disassembled to partition an indoor space of a building and a construction method using the same. A construction panel assembly according to an embodiment includes a main frame disposed to be arranged to be mutually opposed on a wall surface at a predetermined position determined according to design specifications, an auxiliary frame inserted into the main frame to define a structure, a flat panel  400  mounted on the structure to partition a space, and a finishing member for shielding a connection portion of the main frame and the auxiliary frame. 
         [0054]    Hereinafter, a construction panel assembly and a construction method using the same according to a first embodiment will be firstly described. 
         [0055]      FIG. 3  is an overall perspective view illustrating a construction panel assembly according to a first embodiment, and  FIG. 4  is a perspective view illustrating each member of a construction panel assembly according to the first embodiment. 
         [0056]    In the first embodiment, the main frame includes a first main frame  210 , the auxiliary frame includes a flat panel fixing member  310  inserted into the first main frame  210 , and the finishing member includes a molding  510  and a washboard  610  for shielding the connection portion of the first main frame  210  and the flat panel fixing member  310 . The flat panel  400  is mounted between the first main frame  210  and the flat panel fixing member  310  to partition a space. 
         [0057]    As illustrated in the drawings, the present disclosure may be most preferably applied to a wall structure for partitioning a space in a building and include: a first main frame  210  basically fixedly installed between a ceiling and a floor; a flat panel fixing member  310  inserted into the first main frame  210 ; a flat panel  400  mounted in a flat panel insertion groove  217  defined by the first main frame  210  and the flat panel fixing member  310 ; and a molding  510  and a washboard  610  for shielding a connection portion of the first main frame  210 , the flat panel fixing member  310  and the flat panel  400 . 
         [0058]    The first main frame  210  is installed on a ceiling and a floor at a position determined according to design specifications. That is, the main frame  210  may be simply fixed by using a fastening element, such as a small screw (not shown), while the main frame  210  is arranged along reference lines (not shown) marked on the ceiling and the floor. 
         [0059]    Also, the flat panel  400  is inserted while being brought in contact with body support members  211   a  and  211   b , flat panel support members  213   a  and  213   b , and a flat panel guide member  214  of the first main frame  210  fixed to the ceiling and the floor. Then, a support member connecting groove  311  formed in the flat panel fixing member  310  is fastened to a support member connecting protrusion  218  formed at one end portion of the first main frame  210 , such that the first main frame  210  and the flat panel fixing member  310  are fixed and the flat panel  400  is simultaneously mounted. Also, the flat panel  400  is inserted into a flat panel insertion groove  217  defined by the first main frame  210  and the flat panel fixing member  310  to define a wall surface. Almost all materials formed into panels, such as wood or gypsum, steel, and glass plates may be used as materials for the flat panel  400 . 
         [0060]    A gasket  910  is inserted into a gasket insertion member  511 . Then, the molding  510  is inserted into molding insertion grooves  212   c  and  212   d , which are defined by the body support members  211   a  and  211   b , horizontal connection frame support members  212   a  and  212   b , and the flat panel support members  213   a  and  213   b  of the first main frame  210 , from both sides of the first main frame  210  so as to shield all connection portions in an upper portion of the wall structure. Here, gasket fixing protrusions  219  and  512  and a molding fixing protrusion  912  have an effect of consolidating the coupling of the first main frame  210 , the gasket  910 , and the molding  510 . 
         [0061]    The washboard  610  shields all connection portions in a lower portion of the wall structure in such a way that a washboard upper insertion protrusion  611  is fastened into a washboard insertion groove  216   a  defined by a washboard insertion protrusion  216  of the first main frame  210 , and a washboard lower insertion protrusion  612  is fastened into a washboard insertion groove  215   a  defined by a washboard insertion protrusion  215  of the first main frame  210 . Here, a washboard finishing member  613  contacts a floor surface to have an effect of consolidating the coupling of the washboard  610  and the first main frame  210 . 
         [0062]    Also, as illustrated in  FIG. 11 , when a wall structure in one direction and a wall structure in a direction perpendicular to the one direction are to be connectedly installed, connection frames  800  are interposed on a post frame  700  to mount the flat panels  400  in installation directions of the wall structures. 
         [0063]    That is, concave grooves  701  are formed on the post frame  700  in four directions, such that protrusions  801  formed on the connection frames  800  are fastened to each other. Thus, the assembly of the flat panel  400  is possible in the four horizontal and vertical directions. That is, when the wall structure and the wall structure in a perpendicular direction are to be connectedly installed, they may be freely constructed in the shapes of characters “L”, “T”, and “+” through the same method by using the post frame  700  and the connection frame  800 . 
         [0064]      FIG. 5  is a view illustrating an embodiment of the formation of a wall structure in a construction panel assembly according to the first embodiment. 
         [0065]      FIG. 5 a    is a view illustrating a state in which the upper and lower first main frames  210  are installed, and  FIG. 5 b    is a view illustrating a state in which the post frame  700  is installed. 
         [0066]      FIG. 5 c    is a view illustrating a state in which the flat panel  400  is installed,  FIG. 5 d    is a view illustrating a state in which the flat panel fixing member  310  is installed, and  FIG. 5 e    is a view illustrating a state in which the molding  510  and the washboard  610  are installed. 
         [0067]    A construction method according to an embodiment may be used to construct not only a wall structure, but also a ceiling or a floor, and may be used for a well ceiling and an image wall through the same method. In other words, when the first main frame  210  is in an up-and-down vertical direction or a left-to-light horizontal direction, or also when the first main frame  210  has a partial installation area, the same construction method may be used with a change only in the position of the first main frame  210 . 
         [0068]    Hereinafter, a construction panel assembly and a construction method using the same according to a second embodiment will be firstly described. 
         [0069]      FIG. 6  is an overall perspective view illustrating a construction panel assembly according to a second embodiment,  FIG. 7  is a perspective view illustrating a state in which a finishing cover is detached from a construction panel assembly according to the second embodiment,  FIG. 8  is a perspective view illustrating a state in which main and intermediate frames are detached from a construction panel assembly according to the second embodiment,  FIG. 9  is a cross-sectional view illustrating a state in which a flat panel is assembled in a construction panel assembly according to the second embodiment,  FIG. 10  is a view illustrating a state in which each frame and finishing panel of a construction panel assembly according to the second embodiment are disassembled, and  FIG. 11  is a view illustrating an embodiment in which a wall structure is installed by using a column post frame. 
         [0070]    In the second embodiment, the main frame includes a second main frame  220 , the auxiliary frame includes an intermediate frame  320  inserted into the second main frame  220 , the finishing member includes a finishing cover  520  for shielding a connection portion of the second main frame  220  and the intermediate frame  320 , and the flat panel  400  is mounted between the intermediate frames  320  to partition a space. 
         [0071]    As illustrated in the drawings, the present disclosure may be most preferably applied to a wall structure for partitioning a space in a building, and includes: second main frames  220  basically fixedly installed between a ceiling wall structure and a floor wall structure; intermediate frames  320  inserted between the second main frames  220 , flat panels  400  mounted between the intermediate frames  320 , and finishing covers  520  for shielding a connection portion of the second main frames  220  and the intermediate frames  320 . 
         [0072]    The second main frames  220  are installed opposite each other on a wall surface at a position determined according to design specifications. That is, the second main frame  220  may be simply fixed by using a fastening element, such as a small screw (not shown), while the second main frame  220  is arranged along reference lines (not shown) marked on the wall surface. 
         [0073]    Also, a mounting groove  221  is formed in a central portion of the second main frame  220 , and support members  222   a  and  222   b  having openings at both sides of the mounting groove  221  are simultaneously formed. The second main frame  220  includes a plurality of reinforcement protrusions  223  formed integrally on a bottom surface thereof in order to maintain a gap during attachment thereof to a wall surface. 
         [0074]    The intermediate frame  320  includes a central insertion groove  323  which is defined by a protrusion portion  321  inserted into the mounting groove  221  of the second main frame  220 , and supporting members  322   a  and  322   b  formed at both sides of the protrusion portion  321 . 
         [0075]    Also, the flat panel  400  is inserted into the insertion groove  323  of the intermediate frame  320  to form a wall surface. Almost all materials formed in panels, such as wood, gypsum board, steel, and glass plate, may be used as materials for the flat panel  400 . When the flat panel  400  is formed of glass, it is preferably formed by interposing molding members  401  at both upper ends and both lower ends thereof. 
         [0076]    The finishing cover  520  is installed by being elastically inserted such that the support members  222   a  and  222   b  of the second main frame  220  and the reinforcement members  322   a  and  322   b  of the intermediate frame  320  may be simultaneously shielded. 
         [0077]    That is, protrusions  521   a  and  521   b  are formed at both upper ends and both lower ends of the finishing cover  520 , are coupled to stop recesses  225   a  and  226   b  formed at both ends of the bottom surface of the second main frame  220  and reinforcement members  322   a  and  322   b  of the intermediate frame  320 , and may thus be assembled with or disassembled from each other. 
         [0078]    At upper end portions of the second main frame  220  and the intermediate frame  320 , fixing members  920  may be interposed to provide a coupling force. The fixing members  920  are formed in such a way that pairs of vertical bodies  922   a  and  922   b  are integrally formed on upper and lower surfaces of a single horizontal body  921 , respectively. 
         [0079]    In addition, wire insertion grooves  224  and  324 , through which various kinds of wires for indoor wiring may pass, are formed in the reinforcement members  322   a  and  322   b  of the intermediate frame  320  and the support members  222   a  and  222   b  of the second main frame  220 . As a groove  226  is formed between a bottom surface of the second main frame  220  and the finishing cover  520 , it may be caulked by using a typical material such as epoxy or polyester. 
         [0080]    Also, as illustrated in  FIG. 11 , when a wall structure in one direction and a wall structure in a direction perpendicular to the one direction are to be connectedly installed, connection frames  800  are interposed on a post frame  700  to mount the flat panels  400  in installation directions of the wall structures. 
         [0081]    That is, concave grooves  701  are formed on the post frame  700  in four directions, such that protrusions  801  formed on the connection frames  800  are fastened to each other. Thus, the assembly of the flat panel  400  is possible in each of the horizontal and vertical directions. 
         [0082]    To construct a wall structure for partitioning an indoor space according to the above-described configuration, a reference line (not shown) is marked on a ceiling surface and a floor surface based on design specifications, and the second main frame  220  is then arranged and simultaneously fastened and fixed by screws (not shown). 
         [0083]    Here, as a plurality of reinforcement protrusions  223  are integrally formed on a bottom surface of the second main frame  220 , a predetermined gap is maintained when the second main frame  220  is coupled to a wall surface, and thus, supporting force may further be reinforced. 
         [0084]    Here, since a plurality of reinforcement protrusions  223  are integrally formed on a bottom surface of the second main frame  220 , the second main frame  220  may be more firmly constructed without distortion, and also a predetermined gap is maintained when the second main frame  220  is coupled to a floor surface of a building. Thus, supporting force may further be reinforced and the caulking operation may be more easily performed. 
         [0085]    Next, an insertion groove  323  formed in the intermediate frame  320  is inserted and installed in a coupling portion of a flat panel  400 , and both ends of an intermediate frame  320 , on which the flat panel  400  is installed, may be installed by being inserted into a mounting groove  221  formed on the second main frame  320 . 
         [0086]    Thus, like in a method of assembling a typical window to a window frame, a protrusion portion  321  of the intermediate frame  320 , on which the flat panel  400  is mounted, is inserted into the mounting groove  221  formed in the second main frame  220 , first from a lower side of the second main frame  220 , and then upwardly pushed so as to be vertically installed. 
         [0087]    Also, a fixing member  920  is interposed between the second main frame  220  and the intermediate frame  320 , which are disposed at the ceiling wall structure side, such that the second main frame  220  and the intermediate frame  320  may maintain a state of being firmly coupled. 
         [0088]    That is, in a state in which a horizontal body  921  and a vertical body  922   a  of the fixing member  920  are interposed at the protrusion portion  321  of the intermediate frame  320 , the vertical body  922   b  on the other side is brought in close contact with an inner surface of the insertion groove  221  of the second main frame  220 , and may thus be assembled. 
         [0089]    As such, in a state in which the second main frame  220 , the intermediate frame  320 , and the flat panel  400  are installed, various kinds of wires may be arranged by using wire insertion grooves  224  and  324  formed at both sides of these frames, and a finishing cover  520  is mounted on a connection portion of the second main frame  220  and the intermediate frame  320 . 
         [0090]    Here, in a state in which a protrusion  521   b  formed at a lower end portion of the finishing cover  520  is inserted into stop recesses  225   a  and  225   b  of the second main frame  220 , a protrusion  521   a  formed at an upper end portion of the finishing cover  520  is pushed into reinforcement members  322   a  and  322   b  of the intermediate frame  320 , and thus may be simply assembled. 
         [0091]    Finally, a groove  226  formed between the second main frame and the finishing cover  520  is caulked and finished. 
         [0092]    In the above-described embodiments, a method of installing a wall structure for partitioning a space by using the second main frame  220 , the intermediate frame  320 , and the flat panel  400  has been described. However, when the wall structure together with a wall structure perpendicular thereto are to be connectedly installed, they may be freely constructed in the shapes of characters such as “L”, “T”, and “+” through the same method by using a post frame  700  and a connection frame  800 . 
         [0093]    A construction method according to an embodiment is not limited to only a wall structure and may also be used to construct a ceiling or a floor, and may be used for a well ceiling and a sign image wall through the same method. In other words, when the second main frame  220  is in an up-and-down vertical direction or a left-to-light horizontal direction, or also when the second main frame  220  has a partial installation area, the same construction method may be used with a change only in the position of the second main frame  210 . 
         [0094]    According to embodiments, a construction panel assembly and a construction method using the same have the effects in that a panel formed of various materials, such as plate glass, a gypsum board, plywood, and steel, may be constructed to be freely assembled or disassembled by using a main frame and an auxiliary frame which constitute a structure, such that, unlike in the related art, materials may be reused, and accordingly, the generation of waste may be fundamentally prevented. 
         [0095]    Also, since separate screws are not required between structure materials and finishing materials which constitute a wall structure, there are the effects in that the appearance is pleasing and construction is very simple, so that overall costs may be greatly saved. 
         [0096]    Also, many components required to assemble a typical indoor wall structure are simplified, so that processes required for assembly, such as molding and painting, may be reduced and accordingly, manpower and manufacturing costs may be reduced. 
         [0097]    Also, since the assembly and disassembly are simple, there is the effect in that a once-assembled wall structure may be disassembled and may be re-installed at other locations while the height, width, etc, thereof are arbitrarily adjusted and changed by a user. 
         [0098]    Also, since various wires installed indoors may be configured to be disposed between structure materials and finishing materials, various kinds of wires may be freely and conveniently installed if the finishing materials are detached. Also, since wires may be freely disposed without being exposed to the outside even after the construction of the panel is completed, there is the effect in that indoor spaces may be more cleanly used. 
         [0099]    The object of the present invention may be achieved by the aforementioned technical configurations, and although described with limited embodiments and drawings, the present invention is not limited thereto. It should be understood that various modifications and variations can be made by those skilled in the art in the field of present invention without departing from the spirit and scope of the invention. Accordingly, such modifications and variations should also be understood as falling within the claims of the present invention.

Summary:
Provided is a construction panel assembly, which is applicable to a detachable method capable of assembling and disassembling a ceiling, a wall or a floor material which partitions spaces of various kinds of buildings. Also, the construction panel assembly allows materials to be reused, so that the generation of construction waste may be minimized.