Abstract:
The present invention relates to an openable vinyl fixing device and a vinyl greenhouse. The openable vinyl fixing device enables easy opening and closing of an openable window formed on a roof. In contrast with the conventional fixed idea that when a vinyl opening operator (opener) is positioned at the lowermost end of vinyl, a vinyl supporting pipe does not completely unwind vinyl of a vinyl window, but slightly winds the vinyl, and the vinyl supporting pipe is positioned at the outer portion of the vinyl window, the present invention enables the vinyl to be completely unwound by rotating the vinyl supporting pipe a little bit more when closing the vinyl window, wherein the vinyl supporting pipe is positioned between an arc frame and the vinyl of the vinyl window to thereby form a space, and the vinyl supporting pipe is fixed in the space by means of the openable vinyl fixing device.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
       [0001]    This Application claims the benefit of priority and is a Continuation application of the prior International Patent Application No. PCT/KR2015/013367, with an international filing date of Dec. 8, 2015, which designated the United States, and is related to the Korean Patent Application No. 10-2014-0195816, filed Dec. 31, 2014 and Korean Patent Application No. 10-2015-0010101, filed Jan. 21, 2015, the entire disclosures of all applications are expressly incorporated by reference in their entirety herein. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of the Invention 
         [0003]    The present invention relates to an openable vinyl fixing device and a vinyl greenhouse including the same, and more particularly, to a vinyl greenhouse in which an openable window disposed on a roof may be freely opened and closed using an openable vinyl fixing device, and, instead of using an existing system wherein, when a vinyl opening/closing driving unit (an opening/closing unit) is positioned at the lowermost end of a vinyl sheet, a vinyl support pipe does not completely unwind and slightly winds a vinyl sheet of a vinyl window and is positioned at an outer portion of the vinyl window, vinyl is completely unwound by turning a vinyl support pipe a little more when a vinyl window is closed, the vinyl support pipe is positioned between an arc frame and the vinyl sheet of the vinyl window to form a space, and the vinyl support pipe is fixed in the space by the openable vinyl fixing device. 
         [0004]    2. Description of Related Art 
         [0005]    For stable growth of crops cultivated inside a vinyl greenhouse, generally, it is necessary to control temperature, humidity, and the like of the inside of the vinyl greenhouse. Accordingly, a structure capable of opening a side surface of a vinyl greenhouse has been developed as disclosed in Korean Patent Application Publication No. 10-2010-0067494 which relates to a vinyl opening/closing device of a vinyl greenhouse. 
         [0006]    In such a conventional vinyl greenhouse as disclosed above, entrance doors and side windows can be freely opened and closed, but it is impossible to freely open and close roof windows, and thus, in the summer, when temperatures are high, damage such as occurrence of various blights occurs due to a high-temperature phenomenon, poor ventilation, and lack of moisture inside a vinyl greenhouse. 
         [0007]      FIG. 12  is a schematic view of a roof window frame part of a conventional vinyl greenhouse. In the conventional vinyl greenhouse, when a vinyl support pipe  14 , driven by a vinyl opening/closing driving unit, is positioned at the lowermost end of the roof window frame part, as illustrated in  FIG. 12 , a vinyl window is completely closed, and, in this case, an openable vinyl sheet  12  is not completely unwound but unwound slightly less. Thus, during wind or rain, the vinyl support pipe  14  and the openable vinyl sheet  12  shake, and thus are tied with a string to prevent this. Such an existing system has been used to date and, in particular, it is still difficult to freely open or close a roof window. 
         [0008]    In addition, conventional vinyl greenhouses are used for many years after installation until the vinyl is damaged. In this regard, damage due to accumulation of salts in soil and sluggish growth problems due to decrease in light transmittance as vinyl wears out have not been solved. 
       BRIEF SUMMARY OF THE INVENTION 
       [0009]    Therefore, the present invention has been made in view of the above problems, and it is one object of the present invention to provide an openable vinyl fixing device and a vinyl greenhouse, in which, instead of using the above-described existing system, a vinyl support pipe is turned so that an openable vinyl sheet is completely unwound, and further turned to wind the openable vinyl sheet in the opposite direction, thereby forming a space between a vinyl greenhouse frame part and the openable vinyl sheet, and a fixing device is installed in the space to freely and conveniently open and close both a side vinyl sheet and a roof vinyl sheet simply. 
         [0010]    It is another object of the present invention to provide a vinyl greenhouse in which an openable vinyl fixing device used to open and close a roof vinyl sheet and a side vinyl sheet moves upward or downward in cooperation with driving of a vinyl support pipe, whereby the vinyl sheet is conveniently opened or closed. 
         [0011]    The above objects and various advantages of the present invention will become more apparent from exemplary embodiments of the present invention by those skilled in the art. 
         [0012]    In accordance with one aspect of the present invention, provided is an openable vinyl fixing device detachably fixing a lower portion of an openable vinyl sheet of a vinyl greenhouse to arc frames to thereby maintain a state in which the openable vinyl sheet is closed, wherein an upper end of the openable vinyl sheet is fixed to a vinyl support pad, and a lower end thereof is coupled to a vinyl support pipe, and the openable vinyl fixing device includes: a fixing main body including a pad insertion groove into which the vinyl support pad is inserted, having, on one side thereof, a pipe coupling groove rotatably coupled to the arc frames about the pad insertion groove, and provided, at a front end thereof, with a support pipe engagement protrusion engaged with and coupled to the vinyl support pipe; and an elastic member supporting the fixing main body so as to elastically move upward or downward with respect to the arc frames. 
         [0013]    According to one embodiment, the fixing main body is provided, at an upper surface thereof, with a support pipe guide surface having a curved shape to guide movement of the vinyl support pipe when the vinyl support pipe moves upward or downward. 
         [0014]    According to one embodiment, the fixing main body is provided, at another side surface thereof, with a support pipe engagement surface recessed to a certain depth about the pad insertion groove in an inner direction, from which the support pipe engagement protrusion extends upward. 
         [0015]    According to one embodiment, the pad insertion groove is provided, at an inner wall surface of one side thereof, with a pad seating surface protruding inwards to correspond to a shape of the vinyl support pad, the pad seating surface being seated on an upper surface of the vinyl support pad and the vinyl support pad and the support pipe guide surface being connected to each other, when the fixing main body moves downward by movement of the vinyl support pipe. 
         [0016]    According to one embodiment, the openable vinyl fixing device further includes a vinyl protection plate horizontally extending and formed in a certain area on the support pipe guide surface to prevent damage to vinyl when the fixing main body moves upward or downward. 
         [0017]    According to one embodiment, the openable vinyl fixing device includes: a movement restricting groove penetratively formed at a plate surface of the fixing main body to a certain length in an upper or lower movement direction thereof; and a movement restricting shaft inserted into the arc frames via the movement restricting groove to limit a range of an upward or downward movement of the fixing main body by movement of the vinyl support pipe. 
         [0018]    In accordance with another aspect of the present invention, provided is a vinyl greenhouse including: a frame part having a plurality of arc frames arranged in a length direction and horizontal frames connecting the arc frames with each other; a plurality of vinyl support pad parts arranged along the arc frames with constant intervals therebetween to fix vinyl; a fixed vinyl part fixed and coupled between neighboring ones of the vinyl support pad parts; an openable vinyl part disposed next to the fixed vinyl part, an upper end of the openable vinyl part being fixed to the vinyl support pad part and a lower end thereof being coupled to a vinyl support pipe; a vinyl opening/closing driving unit coupled to the vinyl support pipe to rotate the vinyl support pipe forward or backward so that the openable vinyl part is opened or closed with respect to the frame part; and the above-described openable vinyl fixing device. 
         [0019]    In accordance with another aspect of the present invention, provided is a vinyl greenhouse including a vinyl greenhouse frame part to form a frame of the vinyl greenhouse, a vinyl support pipe, a vinyl opening/closing driving unit to drive the vinyl support pipe, and an openable vinyl sheet, one side of the openable vinyl sheet being connected to the vinyl support pipe and another side thereof being connected to the vinyl support pipe, wherein the vinyl opening/closing driving unit rotates the vinyl support pipe so that the openable vinyl sheet is completely unwound, when closing a vinyl window of the vinyl greenhouse, and then further turns more the vinyl support pipe so that the openable vinyl sheet is wound upward in the opposite direction, thereby forming a space between the vinyl greenhouse frame part and the openable vinyl sheet, and the vinyl support pipe is fixed to an openable vinyl fixing device installed in the space. 
         [0020]    As is apparent from the fore-going description, the present invention advantageously provides a vinyl greenhouse in which an upper roof window and a lower roof window are openably disposed on a roof, and include an upper openable vinyl sheet and a middle openable vinyl sheet, respectively, and each of the upper and lower roof windows includes an openable vinyl fixing device at a lower portion thereof. 
         [0021]    The openable vinyl fixing device allows a support pipe to smoothly move without inhibiting movement thereof while elastically moving backward or forward by a load of the support pipe. Accordingly, the upper and lower roof windows may be opened and closed with less force. 
         [0022]    Thus, a user may freely open or close the upper and lower roof windows at a desired time manually or automatically. 
         [0023]    Meanwhile, a distance by which the openable vinyl fixing device moves upward or downward is limited by a movement restricting groove. In addition, a vinyl protection plate is formed in a certain area at an upper surface of the openable vinyl fixing device, and thus contacts an openable vinyl sheet when the openable vinyl fixing device moves upward or downward and prevents damage to the openable vinyl sheet. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]    The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
           [0025]      FIG. 1  is a perspective view illustrating a structure in which all openable vinyl parts of a vinyl greenhouse according to the present invention are opened; 
           [0026]      FIG. 2  is a front view illustrating a structure of a vinyl greenhouse according to the present invention; 
           [0027]      FIG. 3  is a perspective view illustrating a structure of a vinyl support pad part of a vinyl greenhouse according to the present invention; 
           [0028]      FIG. 4  is a perspective view illustrating a structure of an openable vinyl fixing device according to the present invention; 
           [0029]      FIGS. 5 to 7  are views illustrating a process of operating an openable vinyl fixing device according to the present invention; 
           [0030]      FIG. 8  is a view illustrating a state in which all openable vinyl parts of a vinyl greenhouse according to the present invention are opened; 
           [0031]      FIGS. 9 and 10  are views illustrating a process of operating an openable vinyl fixing device according to another embodiment of the present invention; 
           [0032]      FIG. 11  is a schematic view of only a roof window frame part of a vinyl greenhouse according to the present invention; and 
           [0033]      FIG. 12  is a schematic view of only a roof window frame part of a conventional vinyl greenhouse. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     [Best Mode] 
       [0034]    For full understanding of the present invention, exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various forms and the scope of the present invention should not be construed as being limited to the embodiments set forth herein. Thus, shapes and the like of elements in the drawings can be exaggerated for more clear explanation. It should be noted that like reference numerals in the drawings denote like elements. Detailed description of known functions and structures are omitted when it is deemed that they may unnecessarily obscure the essence of the invention. 
         [0035]      FIG. 1  is a perspective view illustrating a state in which all openable windows A, B, and C of a vinyl greenhouse  100  according to the present invention are opened.  FIG. 2  is a view illustrating a structure of an arc frame  111  in which the openable windows A, B, and C of the vinyl greenhouse  100  are opened. As illustrated in the drawings, the vinyl greenhouse  100  according to the present invention includes three openable windows, i.e., an upper roof window A, a lower roof window B, and a side window C. The openable windows A, B, and C are freely opened and closed by an openable vinyl part  140  and openable vinyl fixing devices  160  and  160   a.  Accordingly, a user may freely open and close the upper and lower roof windows A and B as well as the side window C in consideration of weather, temperature, humidity, and the like. 
         [0036]    The vinyl greenhouse  100  according to the present invention includes a frame part  110  to form a frame, a plurality of vinyl support pad parts  120  to fix vinyl to the outside of the frame part  110 , a fixed vinyl part  130  fixed between the vinyl support pad parts  120 , an openable vinyl part  140  to form the openable windows A, B, and C, a vinyl opening/closing driving unit  150  to provide driving force so that the openable vinyl part  140  is opened or closed, and the openable vinyl fixing devices  160  and  160   a  to fix the openable vinyl part  140  so as to maintain a state in which the openable vinyl part  140  is closed. 
         [0037]    The frame part  110  includes a plurality of arc frames arranged in a length direction and horizontal frames  113  connecting the arc frames  111  to one another. The arc frames  111  are buried under the ground and fixed in position, and fixed to one another by the horizontal frames  113 . 
         [0038]    The vinyl support pad part  120  supports vinyl to be fixed to the outside of the frame part  110 . As illustrated in  FIG. 2 , the vinyl support pad parts  120  are configured along the arc frames  111 . The vinyl support pad parts  120  are configured such that a pair of roof window upper pads  121 , a pair of roof window middle pads  123 , a pair of roof window lower pads  125 , a pair of side window upper pads  127 , and a pair of side lower pads  129  are positioned at opposite sides of the arc frames  111  with constant intervals therebetween. 
         [0039]    The roof window upper pad  121  fixes an upper fixed vinyl sheet  131  and an upper openable vinyl sheet  141 . The roof window middle pad  123  fixes an upper end of a middle openable vinyl sheet  143 . The roof window lower pad  125  and the side window upper pad  127  respectively fix opposite ends of a shoulder fixed vinyl sheet  133 . In addition, the side window upper pad  127  supports an upper end of a lower openable vinyl sheet  145 . The side lower pad  129  fixes an upper portion of a lower fixed vinyl sheet  135 . 
         [0040]      FIG. 3  is a perspective view illustrating a structure of the side window upper pad  127 . As illustrated in the drawing, the side window upper pad  127  is horizontally arranged to connect the arc frames  111  to one another. The side window upper pad  127  has an upper opening having a C-shaped cross section. An upper end of the lower openable vinyl sheet  145  is inserted via the upper opening, and a vinyl fixing member  127   a  is inserted thereinto to pressurize the lower openable vinyl sheet  145 . The upper end of the lower openable vinyl sheet  145  is fixed to the inside of the side window upper pad  127  by pressurization of the vinyl fixing member  127   a.    
         [0041]    The roof window upper pad  121 , the roof window middle pad  123 , the roof window lower pad  125 , and the side lower pad  129  also fix the corresponding vinyl sheet in the same manner as in the side window upper pad  127 . In this case, the roof window upper pad  121  contacting with the fixed vinyl sheets  131 ,  133 ,  135  and the openable vinyl sheets  141 ,  143 ,  145 , and the side upper pad  127  fix the corresponding fixed and openable vinyl sheets together. 
         [0042]    A user may fix vinyl to the vinyl support pad part  120  by pressurization using the vinyl fixing member  127   a,  and thus may conveniently replace the vinyl. 
         [0043]    The fixed vinyl part  130  is fixed in position without being opened or closed at the frame part  110  of the vinyl greenhouse  100 . The vinyl greenhouse  100  of the present invention includes the upper fixed vinyl sheet  131 , the shoulder fixed vinyl sheet  133 , and the lower fixed vinyl sheet  135 . The upper fixed vinyl sheet  131  is formed in a certain area at the uppermost end of the arc frames  111 . The shoulder fixed vinyl sheet  133  is formed in a certain area in a region connecting a side surface of the arc frames  111  to the roof thereof. The lower fixed vinyl sheet  135  is formed in a certain area in a side lower region between the arc frames  111  and the ground. 
         [0044]    The upper fixed vinyl sheet  131  is fixed to the pair of roof window upper pads  121 . Opposite ends of the shoulder fixed vinyl sheet  133  are fixed to the roof window lower pad  125  and the side window upper pad  127 , respectively. An upper portion of the lower fixed vinyl sheet  135  is fixed to the side lower pad  129 , and a lower portion thereof is buried under the ground. 
         [0045]    The openable vinyl part  140  opens or closes the openable windows A, B, and C. The openable vinyl part  140  includes the upper openable vinyl sheet  141  to open or close an upper roof window A, the middle openable window  143  to open or close a lower roof window B, and the lower openable vinyl sheet  145  to open or close a side window C. 
         [0046]    An upper end of the upper openable vinyl sheet  141  is fixed to the roof window upper pad  121 , and a lower portion thereof is coupled to an upper vinyl support pipe  142 . An upper end of the middle openable vinyl sheet  143  is fixed to the roof window middle pad  123 , and a lower portion thereof is coupled to a middle vinyl support pipe  144 . An upper end of the lower openable vinyl sheet  145  is fixed to the side window upper pad  127 , and a lower portion thereof is coupled to a lower vinyl support pipe  146 . 
         [0047]    The upper, middle and lower vinyl support pipes  142 ,  144 , and  146  are fixed in a state of being wound at lower portions of the upper, middle and lower openable vinyl sheets  141 ,  143 , and  145 , respectively. Each of the upper, middle and lower vinyl support pipes  142 ,  144 , and  146  is coupled to the vinyl opening/closing driving unit  150 , and rotates forward or backward by driving of the vinyl opening/closing driving unit  150 . Once each of the upper, middle and lower vinyl support pipes  142 ,  144 , and  146  rotates in a direction in which vinyl is wound, i.e., upward, by the vinyl opening/closing driving unit  150 , the corresponding openable vinyl sheets  141 ,  143 , and  145  are wound on the respective vinyl support pipes  142 ,  144 , and  146  and, accordingly, the openable windows A, B, and C are opened. 
         [0048]    On the other hand, when the vinyl opening/closing driving unit  150  is driven in a direction in which the openable vinyl sheets  141 ,  143 , and  145  are closed, the respective vinyl support pipes  142 ,  144 , and  146  unwind the openable vinyl sheets  141 ,  143 , and  145  and, accordingly, the openable windows A, B, and C are covered by the openable vinyl sheets  141 ,  143 , and  145 , respectively. 
         [0049]    As illustrated in  FIG. 1 , the vinyl opening/closing driving unit  150  is coupled to each of the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146 , and thus the upper, middle, and lower openable vinyl sheets  141 ,  143 , and  145  are wound or unwound by rotating forward or backward the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146 , respectively. The vinyl opening/closing driving unit  150  includes an opening/closing main body  151  coupled to the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146 , and a lever  153  coupled to the opening/closing main body  151 . The opening/closing main body  151  includes a chain gear, and the like inside thereof to rotate the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146 . 
         [0050]    In this case, the vinyl opening/closing driving unit  150  may automatically operate by a driving force of a motor, or a user may operate the vinyl opening/closing driving unit  150  by directly rotating the lever  153 . 
         [0051]    In addition, the vinyl opening/closing driving unit  150  may be configured to operate the upper, middle, and lower openable vinyl sheets  141 ,  143 , and  145  independently or simultaneously. 
         [0052]    The openable vinyl fixing devices  160  and  160   a  maintain a state in which the respective openable vinyl sheets  141 ,  143 , and  145  are fixed in a state wherein the openable vinyl part  140  closes the openable windows A, B, and C. When wind or external force is applied, the closed openable vinyl sheets  141 ,  143 , and  145  may flap or deviate from the original position thereof and, as a result, may be torn or damaged. Thus, the openable vinyl fixing devices  160  and  160   a  are engaged with and coupled to the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146  in a closed state so that the openable vinyl part  140  maintains a stably closed state. 
         [0053]    As illustrated in  FIG. 1 , the openable vinyl fixing devices  160  and  160   a  are configured in plural with constant intervals therebetween at the arc frames  111 . As a distance between the openable vinyl fixing devices  160  and  160   a  decreases, a fixing force for openable vinyl sheets is enhanced and thus a vinyl greenhouse may be stably maintained even when wind or external force is applied thereto. 
         [0054]    As illustrated in  FIG. 4 , the openable vinyl fixing devices  160  and  160   a  include an upper openable vinyl fixing device  160  to fix the upper vinyl support pipe  142  and a middle openable vinyl fixing device  160   a  to fix the middle vinyl support pipe  144 . The upper openable vinyl fixing device  160  and the middle openable vinyl fixing device  160   a  have the same configuration and operate in the same manner. 
         [0055]    The openable vinyl fixing devices  160  and  160   a  includes a fixing main body  161  rotatably coupled to the arc frames  111 , a pipe fixing bolt  162   a  rotatably supporting the fixing main body  161  on the arc frames  111 , a movement restricting shaft  164   a  to restrict movement distances of the openable vinyl fixing devices  160  and  160   a,  an elastic member  165  to provide an elastic force so that the fixing main body  161  returns to the initial position, and a vinyl protection plate  167  coupled to an upper surface of the fixing main body  161  to protect the upper, middle, and lower openable vinyl sheets  141 ,  143 , and  145 . 
         [0056]      FIG. 5  is a view illustrating a process of fixing the upper vinyl support pipe  142  using the upper openable vinyl fixing device  160 . 
         [0057]    The fixing main body  161  is formed in a streamlined shape in which the width thereof becomes narrower from the front to the rear. The fixing main body  161  is provided, at an upper surface thereof, with a first support pipe guide surface  161   a  and a second support pipe guide surface  161   b.  The first and second support pipe guide surfaces  161   a  and  161   b  are formed in a curved shape so as to wind or unwind the upper openable vinyl sheet  141  when the upper vinyl support pipe  142  is rotated by the vinyl opening/closing driving unit  150 . The first support pipe guide surface  161   a  is formed as a curved surface having a gentle slope in an inner direction so as not to form resistance when the upper vinyl support pipe  142  winds the upper openable vinyl sheet  141  while moving upward. 
         [0058]    The fixing main body  161  is provided, at another side thereof, with a support pipe engagement surface  161   c  engaged with and coupled to the upper vinyl support pipe  142 . The support pipe engagement surface  161   c  is recessed from a side surface of the fixing main body  161  at a curvature r 2  corresponding to the diameter of the upper vinyl support pipe  142 . A support pipe engagement protrusion  161   d  protruding from the side surface of the fixing main body  161  by a certain height is formed at an upper surface of the support pipe engagement surface  161   c.    
         [0059]    As illustrated in  FIG. 7 , the support pipe engagement surface  161   c  and the support pipe engagement protrusion  161   d  accommodate the upper vinyl support pipe  142  moved along the first support pipe guide surface  161   a  and the second support pipe guide surface  161   b,  to be fixed in position. The upper vinyl support pipe  142  is inserted into the recessed support pipe engagement surface  161   c,  and the protruding support pipe engagement protrusion  161   d  covers an upper surface of the upper vinyl support pipe  142  to be fixed in position. 
         [0060]    The fixing main body  161  is provided, at one side thereof, with a pipe coupling groove  162  to penetrate the fixing main body  161 . The pipe fixing bolt  162   a  is inserted into the pipe coupling groove  162 . The pipe fixing bolt  162   a  penetrates and is inserted into the pipe coupling groove  162  and the arc frame  111 . Accordingly, the fixing main body  161  may rotate about the pipe fixing bolt  162   a.    
         [0061]    The fixing main body  161  is provided, at a plate surface thereof, with a pad insertion groove  163  formed in a certain area into which the vinyl support pad part  120  is inserted. As illustrated in  FIG. 4 , the upper openable vinyl fixing device  160  is coupled to a lower portion of the roof window middle pad  123 . When the upper openable vinyl fixing device  160  moves upward or downward, the roof window middle pad  123  is inserted into the pad insertion groove  163 . Accordingly, the pad insertion groove  163  is formed to a width corresponding to the width of the roof window middle pad  123 . 
         [0062]    The pad insertion groove  163  is provided, at an upper portion of an inner side wall thereof, with a pad seating surface  163   a  protruding in a central direction towards the roof window middle pad  123 . The pad seating surface  163   a  protrudes to correspond to a shape of the roof window middle pad  123  and thus is seated on an upper surface of the roof window middle pad  123  when the fixing main body  161  moves upward or downward. Accordingly, the roof window middle pad  123  and the fixing main body  161  support each other in contact with each other, and the first support pipe guide surface  161   a  and the roof window middle pad  123  are smoothly connected to each other. 
         [0063]    Thus, the first support pipe guide surface  161   a  is smoothly connected to the roof window middle pad  123  without occurrence of a step or a raised spot in a connection area therebetween. The upper vinyl support pipe  142  may smoothly move along the first support pipe guide surface  161   a  and a connection surface connecting the roof window middle pad  123  and the second support pipe guide surface  161   b  when winding or unwinding the upper openable vinyl sheet  141  along the fixing main body  161 . 
         [0064]    Meanwhile, the pad insertion groove  163  is provided, at one side thereof, with a movement restricting groove  164  penetratively formed to a certain length along an upper or lower movement direction of the fixing main body  161 . The movement restricting shaft  164   a  is inserted into the movement restricting groove  164  to penetrate the arc frames  111 . The movement restricting groove  164  restricts a distance that the fixed main body  161  is moved downward by the weight of the upper vinyl support pipe  142  when the upper vinyl support pipe  142  is moved. Accordingly, the fixing main body  161  may be prevented from escaping from the arc frames  111  or being damaged. 
         [0065]    The pad insertion groove  163  is provided with the elastic member  165  that returns the fixing main body  161  moved downward to the initial position. An upper end of the elastic member  165  is fixed to the arc frames  111  to which the roof window middle pad  123  is coupled, and a lower end thereof is fixed to the pad insertion groove  163 . The elastic member  165  allows the fixing main body  161 , moved downward by the weight of the upper vinyl support pipe  142  when the upper vinyl support pipe  142  is moved, to return to the initial position thereof when the load of the upper vinyl support pipe  142  is removed. The elastic member  165  acts an elastic force in a direction in which the fixing main body  161  moves to an upwardly moved position. 
         [0066]    Meanwhile, the vinyl protection plate  167  is coupled in a certain area to the first and second support pipe guide surfaces  161   a  and  161   b  of the fixing main body  161 . When the fixing main body  161  moves upward or downward, sharp end portions of the first and second support pipe guide surfaces  161   a  and  161   b  contact the upper and middle openable vinyl sheets  141  and  143 , and, in this case, the vinyl protection plate  167  prevents damage to the corresponding vinyl. 
         [0067]    The vinyl protection plate  167  is formed to have a wide area and a smooth curved surface. Accordingly, damage to vinyl to be in contact therewith is prevented. 
         [0068]    A process of opening and closing the openable windows A, B, and C of the vinyl greenhouse  100  according to the present invention having such a configuration will now be described with reference to  FIGS. 1 to 8 . 
         [0069]      FIG. 8  is a view illustrating a state in which all the openable windows A, B, and C of the vinyl greenhouse  100  according to the present invention are closed. As illustrated in the drawing, the upper roof window A is closed by the upper openable vinyl sheet  141 , the lower roof window B is closed by the middle openable vinyl sheet  143 , and the side window C is closed by the lower openable vinyl sheet  145 . 
         [0070]    In this case, the upper vinyl support pipe  142  of the upper openable vinyl sheet  141  is fixed by the upper openable vinyl fixing device  160 , and the middle vinyl support pipe  144  of the middle openable vinyl sheet  143  is fixed by the lower openable vinyl fixing device  160   a.    
         [0071]    As illustrated in  FIG. 7 , the upper vinyl support pipe  142  is engaged with and coupled between the support pipe engagement surface  161   c  and the support pipe engagement protrusion  161   d  of the fixing main body  161  to be fixed in position. In this regard, an insertion hole (not shown), through which the second support pipe guide surface  161   b  of the fixing main body  161  is inserted, is penetratively formed at a plate surface of the middle openable vinyl sheet  143  coupled to the roof window middle pad  123  inserted into the pad insertion groove  163  of the fixing main body  161 . The fixing main body  161  moves through the middle openable vinyl sheet  143  when moving upward or downward. 
         [0072]    The middle vinyl support pipe  144  is fixed to the lower openable vinyl fixing device  160   a  in the same manner as described above. 
         [0073]    In this state, when a user operates the vinyl opening/closing driving unit  150  to open the openable windows A, B, and C, the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146  move upward, thereby winding the upper, middle, and lower openable vinyl sheets  141 ,  143 , and  145 . 
         [0074]    The upper and middle vinyl support pipes  142  and  144  escape from the support pipe engagement protrusion  161   d  and the support pipe engagement surface  161   c  by clockwise rotation in the state of  FIG. 7 , and then move upward along the second support pipe guide surface  161   b.    
         [0075]    The upper vinyl support pipe  142  is forcibly moved while rotating by a driving force of the vinyl opening/closing driving unit  150 , and the fixing main body  161  moves backward while rotating downward about the pipe fixing bolt  162   a,  by the weight of the upper vinyl support pipe  142 . 
         [0076]    Accordingly, as illustrated in  FIG. 6 , the first and second support pipe guide surfaces  161   a  and  161   b  of the fixing main body  161  move backward to the same height as that of the roof window middle pad  123 . The pad seating surface  163   a  is seated on an upper portion of the first support pipe guide surface  161   a  and a connection surface is formed. The upper vinyl support pipe  142  moves beyond the height of the roof window middle pad  123  while the fixing main body  161  moves backward. Even in this state, the second support pipe guide surface  161   b,  the roof window middle pad  123 , and the first support pipe guide surface  161   a  form an overall smooth inclined surface, and thus, the upper vinyl support pipe  142  may smoothly move with less force. Thus, labor may be minimized even though a user manually operates the openable windows A, B, and C. 
         [0077]    Meanwhile, as illustrated in  FIG. 7 , when the upper vinyl support pipe  142  moves to the first support pipe guide surface  161   a  by passing the roof window middle pad  123 , a load applied to the fixing main body  161  is the greatest, and thus, the fixing main body  161  moves downward as much as possible. In this regard, the fixing main body  161  moves along the movement restricting groove  164  about the movement restricting shaft  164   a  and a distance by which the fixing main body  161  is moved is limited. 
         [0078]    The upper vinyl support pipe  142  moves upward via the fixing main body  161  while winding the upper openable vinyl sheet  141  on a surface thereof, thereby opening the roof upper window A as illustrated in  FIG. 2 . In the same manner as described above, the roof lower window B and the side window C may also be opened. 
         [0079]    In this regard, a degree to which the upper roof window A, the lower roof window B, and the side window C are opened may be adjusted by a degree to which the vinyl opening/closing driving unit  150  is driven. When the openable windows A, B, and C are completely opened, as illustrated in  FIG. 2 , the vinyl support pipes  142 ,  144 , and  146  are engaged with and supported on the support pipe engagement protrusion  161   d.    
         [0080]    In addition, a gear inside the opening/closing main body  151  of the vinyl opening/closing driving unit  150  holds the upper, middle, and lower vinyl support pipes  142 ,  144 , and  146 , and thus a state in which the upper roof window A, the lower roof window B, and the side window C are opened may be stably maintained. 
         [0081]    Meanwhile, the opened openable windows A, B, and C may be closed such that a user drives the vinyl opening/closing driving unit  150  in a reverse direction. Accordingly, as illustrated in  FIG. 5 , the upper vinyl support pipe  142  moves along the arc frames  111  while rotating downward, and is unwound, thereby closing the roof upper window A. 
         [0082]    The upper vinyl support pipe  142  moves along the first support pipe guide surface  161   a  and the fixing main body  161  moves backward while rotating about the pipe fixing bolt  162   a,  by the load of the upper vinyl support pipe  142 . In addition, as illustrated in  FIG. 6 , the upper vinyl support pipe  142  moves along the second support pipe guide surface  161   b  and the fixing main body  161  is pressurized by the upper openable vinyl sheet  141 , whereby a state in which the fixing main body  161  is moved backward is maintained. 
         [0083]    As illustrated in  FIG. 7 , the upper vinyl support pipe  142  moves to the support pipe engagement surface  161   c  via the second support pipe guide surface  161   b  and is engaged with and coupled to the support pipe engagement protrusion  161   d.  In this case, when the load of the upper vinyl support pipe  142  applied to the fixing main body  161  is removed, the fixing main body  161  returns upward by the elastic force of the elastic member  165 . Accordingly, the movement restricting shaft  164   a  moves to the lowermost portion of the movement restricting groove  164 . 
       [Mode] 
       [0084]      FIGS. 9 and 10  are views illustrating a process of operating an openable vinyl fixing device  170  according to another embodiment of the present invention. 
         [0085]    In the above-described openable vinyl fixing devices  160  and  160   a  according to an exemplary embodiment, the pipe fixing bolt  162   a  is installed in a direction in which an openable vinyl sheet is opened. That is, the pipe fixing bolt  162   a  is installed in an upper direction of the arc frames  111 . 
         [0086]    In contrast, in the openable vinyl fixing device  160  and  160   a  according to another embodiment, the pipe fixing bolt  162   a  is installed in a direction in which an openable vinyl sheet is closed. That is, the pipe fixing bolt  162   a  is installed in a lower direction of the arc frames  111 . In this case, a support pipe engagement protrusion  171   d  is formed inside a pad insertion groove  171   c,  and thus the vinyl support pipe  142  is engaged therewith and coupled thereto inside the pad insertion groove  171   c.    
         [0087]      FIG. 11  is a schematic view illustrating only a roof window frame part of a vinyl greenhouse, to explain the concept of the present invention. The vinyl opening/closing driving unit  150  (see  FIG. 1 ) rotates a vinyl support pipe  218  so that an openable vinyl sheet  212  is completely unwound, when closing a vinyl window of a vinyl greenhouse, and then further turns more the vinyl support pipe  218  so that the openable vinyl sheet  212  is wound upward in the opposite direction as an arrow direction of  FIG. 12 , thereby forming a space  210  between a vinyl greenhouse frame part  214  and the openable vinyl sheet  212 . Once the space  210  is formed, an openable vinyl fixing device  220  may be installed in the space  210 , and the vinyl support pipe  218  may be automatically fixed to the openable vinyl fixing device  220  only by rotation of the vinyl support pipe  218  in an arrow direction of  FIG. 11 . 
         [0088]    A vinyl window is opened such that the vinyl support pipe  218  escapes from the openable vinyl fixing device  220  only by rotation of the vinyl support pipe  218  in a direction opposite to the arrow of  FIG. 11  and is continuously rotated to thereby wind the openable vinyl sheet  212  upward in a direction opposite to the arrow. 
         [0089]    As described above, a vinyl greenhouse according to the present invention includes an upper roof window and a lower roof window that are openably disposed on a roof, and the upper roof window and the lower roof window include an upper openable vinyl sheet and a middle openable vinyl sheet, respectively. An openable vinyl fixing device is disposed at a lower portion of each of the upper and lower roof windows. 
         [0090]    The openable vinyl fixing device allows a support pipe to smoothly move without inhibiting movement thereof while elastically moving backward or forward by a load of the support pipe. Accordingly, the upper and lower roof windows may be opened and closed with less force. 
         [0091]    Thus, a user may freely open or close the upper and lower roof windows at a desired time manually or automatically. 
         [0092]    Meanwhile, a distance by which the openable vinyl fixing device moves upward or downward is limited by a movement restricting groove. In addition, a vinyl protection plate is formed in a certain area at an upper surface of the openable vinyl fixing device, and thus contacts an openable vinyl sheet when the openable vinyl fixing device moves upward or downward and prevents damage to the openable vinyl sheet. 
         [0093]    A vinyl greenhouse of the present invention has been described with reference to embodiments thereof for illustrative purposes, and it will be well understood by one of ordinary skill in the art to which the present invention pertains that various modifications and other embodiments equivalent thereto may be derived therefrom. Therefore, it is obvious that the present invention should not be construed as being limited to the forms in the above detailed description. Thus, the technical scope of the present invention should be defined by the technical spirit of the appended claims. In addition, all modifications, equivalents thereto, and substitutions therefor should be understood as being within the spirit and scope of the present invention as defined by the appended claims. 
       INDUSTRIAL APPLICABILITY 
       [0094]    The present invention relates to an openable vinyl fixing device and a vinyl greenhouse including the same, and may be applied to vinyl greenhouse manufacture and installation.