Abstract:
Disclosed are a height-adjustable concrete mold supporting system and a method for constructing concrete floors and concrete walls, by which a concrete building can be easily and precisely constructed with enhanced cost-effectiveness. The system has a bottom bracket detachably disposed on a base member. First and second screw shafts are vertically assembled with the bracket. The first and the second screw shafts are movably inserted into first and second height adjusting tubes. A top mounting board is supported by the first and the second height adjusting tubes. The first and the second height adjusting tubes are fixed to the first and the second screw shafts so as to determine an adjusted space between the bracket and the mounting board.

Description:
FIELD OF THE INVENTION  
         [0001]    The present invention relates to a concrete mold supporting system and a method for constructing a concrete building through the use of the mold supporting system, and more particularly to a height-adjustable concrete mold supporting system and a method for constructing concrete floors and walls whereby a concrete building of precise size and configuration can be easily constructed with enhanced cost-effectiveness.  
         DESCRIPTION OF THE RELATED ART  
         [0002]    Referring first to FIGS. 1 a  to  1   d  showing a conventional concrete building construction method by way of example, reinforcements  12  are disposed above a base member  10 , and then wet concrete is applied up to a predetermined reference level  14 . When the concrete is aged or dried so that a concrete floor body  16  is constructed, a fixing frame  18  for square timbers is disposed on the concrete floor body  16  by means of a plurality of pads such as pieces of plywood. Thereafter, a concrete wall mold  22  is uprightly mounted on the fixing frame  18 , and then concrete is applied into and allowed to dry in the concrete wall mold  22 .  
           [0003]    When the concrete has been dried, the concrete wall mold  22  is detached to expose the hardened concrete wall body  24 . Then again, another base member  10  is disposed on the concrete wall body  24 , and then repeated is the above process including the steps of disposing reinforcements, and constructing the concrete floor body  16  and the concrete wall body  24 . This results in a concrete building with a plurality of stories.  
           [0004]    However, in the conventional method of constructing a concrete building as described above, since the concrete is applied to the reference level based on an rough estimation by a workers eye-sight, the size and surface configuration of the concrete floor body tends to vary bitterly depending on the individual workers judgement and skill. Moreover, since the fixing frame is disposed by interposing pads thereunder with reference to a highest point of the concrete floor body, it is very difficult to dispose the fixing frame in an exact horizontal level.  
           [0005]    In addition, the thickness of the concrete floor body becomes larger than the designed dimension, so that the height of each story of the concrete building is increased. There may be also a problem in that a crack or a declination may be generated in the concrete building due to an increased load and an increased stress.  
           [0006]    Further, when the concrete is applied into the concrete wall mold, the concrete may leak out of the clearance between the concrete floor body and the fixing frame, which must be eliminated by a separate task. In the conventional method, the clearance between the concrete floor body and the fixing frame is blocked by sheets of plywood, etc. However, it has been very difficult to completely block the clearance, which means the conventional method fails to completely prevent the leakage of the concrete. Also, the conventional method requires considerable work force and expense for detaching and disposing the fixing frame, the pads, and the concrete wall mold.  
         SUMMARY OF THE INVENTION  
         [0007]    Accordingly, in view of the problems inherent in the related art, it is an object of the present invention to provide a concrete mold supporting system and a method for constructing concrete floors and concrete walls that assures precise and cost-effective construction of a concrete building with great ease.  
           [0008]    In accordance with one aspect, the invention provides a height-adjustable concrete mold supporting system for use in constructing concrete floors and walls of a concrete building, the system comprising: a bracket detachably disposed on a base member; first and second screw shafts vertically assembled with the bracket; first and second height adjusting tubes into which the first and the second screw shafts are movably inserted; a mounting board supported by the first and the second height adjusting tubes; and means for fixing the first and the second height adjusting tubes to the first and the second screw shafts to determine an adjusted space between the bracket and the mounting board.  
           [0009]    In accordance with another aspect, the invention provides a method for constructing a concrete building through the use of a height-adjustable concrete mold supporting device, the method comprising the steps of: a) attaching the concrete mold supporting device on a base floor; b) adjusting the height of the concrete mold supporting device into alignment with a target reference plane; and c) removably clamping a concrete mold on the concrete mold supporting device. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0010]    The above objects, and other features and advantages of the present invention will become more apparent after a reading of the following detailed description when taken in conjunction with the drawings, in which:  
         [0011]    [0011]FIGS. 1 a  to  1   d  are sectional views illustrating a conventional method for constructing concrete floors and concrete walls of a concrete building;  
         [0012]    [0012]FIG. 2 is an exploded perspective view of a height-adjustable concrete mold supporting system according to an embodiment of the present invention;  
         [0013]    [0013]FIG. 3 is a side elevational section view of the mold supporting system shown in FIG. 2;  
         [0014]    [0014]FIG. 4 is a view similar to FIG. 3 but showing the inventive system which is fixedly attached at its bottom end to a base floor and removably holds concrete mold parts at its top end;  
         [0015]    [0015]FIGS. 5 a  to  5   d  are partially enlarged sectional views illustrating a method for constructing concrete floors and concrete walls of a concrete building according to the present invention; and  
         [0016]    [0016]FIG. 6 is a partially cut-away sectional view of a concrete building constructed by use of the system and method of the present invention. 
     
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS  
       [0017]    A preferred embodiment of the present invention will be described in detail hereinafter with reference to the accompanying drawings.  
         [0018]    It can be appreciated in FIGS. 2 and 3 that a concrete mold supporting system  30  according to the invention includes a bottom anchor bracket  32  which has a fixed plate  34  and a supporting plate  36  assembled above the fixed plate  34 . The fixed plate  34  has a plurality of engaging protuberances  34   b  fixed on and protruding upward from the upper surface of the fixed plate  34 , each of which has a through hole  34   a  vertically extending through the engaging protuberance  34   b . Preferably, the fixed plate  34  may be formed from material such as rubber or resin, which is capable of insulating heat conduction.  
         [0019]    The supporting plate  36  has a plurality of engaging holes, each of which has a plurality of engaging snaps  36   a  arranged around each engaging hole. Each of the engaging protuberances  34   b  of the fixed plate  34  is inserted through each engaging hole and fixedly held by the engaging snaps  36   a.    
         [0020]    At an upper surface of the supporting plate  36  are formed first and second elongated holes  36   b  and  36   c  aligned in line with each other, through which first and second screw shafts  38  and  40  are respectively inserted. The first and the second screw shafts  38  and  40  respectively have first and second shaft heads  38   a  and  40   a  received under the first and the second elongated holes  36   b  and  36   c . First and second nuts  42  and  44  are respectively fitted around the first and the second screw shafts  38  and  40 , and are screwed to abut on upper surfaces of the first and the second elongated holes  36   b  and  36   c , thereby maintaining the first and the second shaft heads  38   a  and  40   a  to abut on lower surfaces of the first and the second elongated holes  36   b  and  36   c . Therefore, the main portions of the first and the second screw shafts  38  and  40  are disposed vertically above the first and the second elongated holes  36   b  and  36   c.    
         [0021]    Further, the concrete mold supporting system  30  includes first and second height adjusting tubes  46  and  48  respectively having first and second tube holes  46   a  and  48   a  into which are inserted the first and the second screw shafts  38  and  40 . Inner diameters of the first and the second tube holes  46   a  and  48   a  are larger than outer diameters of the first and the second screw shafts  38  and  40 . The first and the second height adjusting tubes  46  and  48  respectively have first and second adjusting screw holes  46   b  and  48   b  penetrating through the cylindrical walls of the first and the second height adjusting tubes  46  and  48 . First and second adjusting screws  50  and  52  are respectively screwed through the first and the second adjusting screw holes  46   b  and  48   b  up to the outer surfaces of the first and the second screw shafts  38  and  40 , so as to firmly hold the first and the second screw shafts  38  and  40  in the first and the second height adjusting tubes  46  and  48 . Lower ends of the first and the second height adjusting tubes  46  and  48  are held by third and fourth nuts  54  and  56  screwed around the first and the second screw shafts  38  and  40 .  
         [0022]    The first and the second height adjusting tubes  46  and  48  respectively have first and second assembling screw holes  46   c  and  48   c  formed at upper ends thereof to hold thereon a top mounting board  62  with a bearing surface. The mounting board  62  has first and second recesses  62   a  and  62   b  through the bottom of which are formed first and second recess holes  62   c  and  62   d  respectively. First and second assembling screws  58  and  60  are screwed through the first and the second recess holes  62   c  and  62   d  into the first and the second assembling screw holes  46   c  and  48   c  so that the mounting board  62  is firmly held on the first and the second height adjusting tubes  46  and  48 . The first and the second assembling screws  58  and  60  are completely screwed against the bottoms of the first and the second recesses  62   a  and  62   b  so that they do not protrude above the first and the second recesses  62   a  and  62   b . The second assembling screw  60  has a center screw hole  60   a  formed longitudinally through the center axis thereof.  
         [0023]    The mounting board  62  has a holding protuberance  62   e  formed at one end thereof. A clamp  66  is detachably assembled on the mounting board  62  by a bolt  64 . The clamp  66  has first and second bolt holes  66   a  and  66   b  aligned with each other. The bolt  64  is inserted through the first and the second bolt holes  66   a  and  66   b  and then screwed into the center screw hole  60   a  so as to firmly assemble the clamp  66  with the mounting board  62 .  
         [0024]    As shown in FIG. 4, the bottom bracket  32  of the inventive system  30  is fixed onto a base member  68  by driving nails  70  through the through holes  34   a  of engaging protuberances  34   b  into the base member  68 . Then, in a state that the first and the second adjusting screws  50  and  52  and the third and the fourth nuts  54  and  56  are released, the height of the first and the second height adjusting tubes  46  and  48  is so adjusted that the upper surface of the mounting board  62  becomes level with a predetermined reference level  72 .  
         [0025]    When the upper surface of the mounting board  62  is level with the reference level  72 , the first and the second adjusting screws  50  and  52  are tightly screwed into the first and the second adjusting screw holes  46   b  and  48   b  so that the first and the second height adjusting tubes  46  and  48  are fixed to the first and the second screw shafts  38  and  40 . Thereafter, the third and the fourth nuts  54  and  56  are firmly tightened on the first and the second screw shafts  38  and  40  against the lower ends of the first and the second height adjusting tubes  46  and  48  to aid the supporting or the fixing of the first and the second height adjusting tubes  46  and  48 .  
         [0026]    Hereinafter, described will be a method for constructing concrete floors and walls of a concrete building according to the present invention, with reference to FIGS. 5 a  through  5   d  and  6 .  
         [0027]    At first, as shown in FIG. 5 a , the concrete mold supporting system  30  is fixedly secured on the base floor or member  68  in such a manner that the top bearing surface of the mounting board  62  is flush with the reference level  72  as described above with regard to FIG. 4. When it becomes necessary to adjust the distance between the bottom bracket  32  and the top mounting board  62 , the first and the second screw shafts  38  and  40  are moved along the first and the second elongated holes  36   b  and  36   c  of the supporting plate  36  after the first and the second nuts  42  and  44  are released. Then, the first and the second nuts  42  and  44  are tightened again.  
         [0028]    Thereafter, as shown in FIG. 5 b , concrete reinforcing members  74 , e.g., elongated steel bars, are disposed between the base member  68  and the reference level  72 , and then, as illustrated in FIG. 5 c , wet concrete is injected or applied between the upper surface of the base member  68  and the reference level  72 . The concrete is allowed to be hardened for a sufficient period of time so that a concrete floor body  78  is constructed consequently. When the concrete has been applied up to the reference level  72 , the inventive mold supporting system  30  is buried into the concrete floor body  78  with only the upper surface of the mounting board  62  being exposed to the outside.  
         [0029]    A fixing frame  76  of square shape and a wall-forming mold  80 , as concrete mold parts, are so fixed to the mold supporting system as to be firmly held by the holding protuberance  62   e  of the top mounting board  62  which serves as a clamp. When the fixing frame  76  has been fixed on the upper surface of the mounting board  62 , the lower surface of the fixing frame  76  is flush with the reference level  72 .  
         [0030]    As clearly shown in FIGS. 5 d  and  6 , the wall-forming mold  80  includes an inner plate  80   a  disposed on the upper surface of the fixing frame  76  and an outer plate  80   b  spaced a predetermined distance apart from the inner plate  80   a . The lower end of the inner plate  80   a  is placed on the upper surface of the fixing frame  76 , and the bolt  64  is tightened through the first and the second bolt holes  66   a  and  66   b  of the clamp  66  into the center screw hole  60   a  of the second assembling screw  60 , so that the clamp  66  is fixedly assembled on the mounting board  62  with clamping the concrete wall mold  80  on the fixing frame  76 .  
         [0031]    When the wall-forming mold  80  has been completely assembled, wet concrete is injected into the inner space of the wall-forming mold  80  and allowed to dry therein, so that a concrete wall body  82  is constructed. At the end of hardening process of the wall body  82 , the fixing frame  76  and the wall-forming mold  80  are removed. By reiterating the process of forming the concrete floor body  78  and the concrete wall body  82  as described above, a concrete building having a plurality of stories can be constructed.  
         [0032]    Although the combination of tube and screw shaft is illustrated and described hereinabove as an example of the height-adjustor of the inventive mold supporting system, the invention shall not be limited thereto and other types of height-adjusting mechanism, for instance, pantograph lifter may equally be employed in place of the illustrated screw-type height adjustor.  
         [0033]    It will be understood by those skilled in the art that various changes and modifications may be made to the illustrated embodiment without departing from the true scope of the present invention.