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BACKGROUND 
       [0001]    The invention relates to a technology related to security windows that are applied to single windows and prevent unauthorized entry and falls from windows. 
         [0002]    Security windows are installed to windows in houses, offices, etc. to prevent unauthorized entry and falls out of the windows. 
         [0003]    In general, conventional security widows are fixed to the external window. Once they are fixedly installed to the window, they don&#39;t allow objects to pass through, which is a disadvantage. In particular, conventional security windows are disadvantageous in that, since they are fixed to the window, they cause difficulties in the rapid escape of people during a fire and this may lead to the loss of lives. 
         [0004]    Since conventional security windows are fixed to the external window with bolts, they may be separated from the window by persons with malicious intent removing the bolts, which means that they cannot prevent unauthorized entry from the beginning. 
         [0005]    A conventional technology related to security windows was published in Korean Patent Publication No. 10-2005-0118032. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention has been made in view of the above problems, and provides a security window applied to a single window that cannot be easily removed from the outside of the building and can be removed from the inside of the building, if necessary. 
         [0007]    In accordance with an exemplary embodiment of the present invention, the present invention provides a security window applied to a single window comprising: moving guides fixedly installed between one side of an outside channel&#39;s window and a sash at a location facing the outside channel&#39;s window; and a lattice unit with a number of vertical rods, wherein: the vertical rods are connected to each other by links, form insertion holes to which the moving guides are inserted, and are collapsed or spread out along the moving guides; one vertical rod at one end of the vertical rods is fixed to the sash facing the outside channel&#39;s window; the other vertical rod at the other end of the vertical rods is coupled to an inside channel&#39;s window; the vertical rods are spread out along the moving guides when the inside channel&#39;s window is open; and the vertical rods are collapsed along the moving guides when the inside channel&#39;s window is closed. The vertical rod at the other end of the lattice unit forms one or more coupling holes; the inside channel&#39;s window forms coupling protrusions to be inserted into the coupling holes; when the inside channel&#39;s window is installed to the sash, the coupling protrusions are inserted into the coupling holes, and the inside channel&#39;s window and the lattice unit are coupled to each other. 
         [0008]    Preferably, the coupling protrusion of the inside channel&#39;s window is shaped to have a portion bent in the lower direction; when the top of the inside channel&#39;s window is lifted and inserted in an upper channel of the sash and the bottom is placed on a rail in a lower channel of the sash, the bent portion of the coupling protrusion is locked into the coupling hole of the vertical rod at the other end of the lattice unit, and the inside channel&#39;s window and the lattice unit are coupled to each other. 
         [0009]    Preferably, the security window may further comprise a lift preventing unit, installed at the top of the inside channel&#39;s window, for preventing the inside channel&#39;s window from being lifted up from the sash. 
         [0010]    In accordance with another exemplary embodiment of the present invention, the present invention provides a security window applied to a single window comprising: moving guides fixedly installed between one side of an outside channel&#39;s window and a sash at a location facing the outside channel&#39;s window; a lattice unit with a number of vertical rods, wherein: the vertical rods are connected to each other by links, form insertion holes to which the moving guides are inserted, and are collapsed or spread out along the moving guides; one vertical rod at one end of vertical rods is fixed to the sash facing the outside channel&#39;s window; and the other vertical rod at the other end of the vertical rods forms coupling protrusions; a fixing bar including a body and a locking piece, wherein: the body is installed to one side of an inside channel&#39;s window and forms a coupling hole through which the coupling protrusion passes; and the locking piece connects the top to one end of a pulling wire, is movable up and down, and forms a locking hole at a location corresponding to the coupling hole of the body; and a lock for binding the coupling protrusion of the lattice unit as the locking piece is lifted up by operating a switch connected to the other end of the pulling wire or for unlocking the coupling protrusion by lowering the locking piece. 
         [0011]    Preferably, the coupling protrusion of the lattice unit is shaped to have a portion bent in the lower direction; and the locking piece of the fixing bar is shaped to have a portion bent as the letter ‘L’ in cross-section, wherein: the locking hole facing the coupling hole of the body is formed on one side wall of the bent portion of the locking piece; and when the locking piece is lifted up by operating the lock, the bent portion of the coupling protrusion is bound into the locking hole. 
         [0012]    Preferably, the body of the fixing bar is fixed to the inside channel&#39;s window by a bolt; a bolt guide hole through which that bolt passes is formed on the other side wall of the bent portion of the locking piece of the fixing bar; when the locking piece is lowered, the bolt guide hole faces the bolt, so that the bolt is loosened; and when the locking piece is lifted, the bolt is hidden, so that the bolt is not loosened. 
         [0013]    In accordance with another exemplary embodiment of the present invention, the present invention provides a security window applied to a single window comprising: moving guides extended and installed between both sides of a sash; a lattice unit with a number of vertical rods, wherein: the vertical rods are connected to each other by links, form insertion holes to which the moving guides are inserted, and are collapsed or spread out along the moving guides; one vertical rod at one end of vertical rods is fixed to one side of the sash; and the other vertical rod at the other end of the vertical rods forms coupling protrusions; a fixing bar including a body and a locking piece, wherein: the body is installed to the other end of the sash and forms a coupling hole through which the coupling protrusion of the lattice unit passes; and the locking piece connects the top to one end of a pulling wire, is movable up and down, and forms a locking hole at a location corresponding to the coupling hole of the body; and a lock for binding the coupling protrusion of the lattice unit as the locking piece is lifted up by operating a switch connected to the other end of the pulling wire or for unlocking the coupling protrusion by lowering the locking piece. 
         [0014]    In accordance with another exemplary embodiment of the present invention, the present invention provides a security window applied to a single window comprising: a lattice-fixed security window, where one end of the lattice-fixed security is pivotally fixed to one side of a sash and the other form a coupling protrusion; a fixing bar including a body and a locking piece, wherein: the body is installed to the other end of the sash and forms a coupling hole through which the coupling protrusion of the lattice-fixed security window passes; and the locking piece connects the top to one end of a pulling wire, is movable up and down, and forms a locking hole at a location corresponding to the coupling hole of the body; and a lock for binding the coupling protrusion of the lattice-fixed security window as the locking piece is lifted up by operating a switch connected to the other end of the pulling wire or for unlocking the coupling protrusion by lowering the locking piece. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0015]    The features and advantages of the invention will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which: 
           [0016]      FIG. 1  is an elevation view of a security window applied to a single window, installed to a sash, seen from the inside of the building, in a state where an inside channel&#39;s window is removed, according to a first embodiment of the invention; 
           [0017]      FIG. 2  is a partial perspective view of a security window applied to a single window that describes a lattice unit, moving guide, and coupling protrusion installed to an inside channel&#39;s window, according to a first embodiment of the invention; 
           [0018]      FIG. 3  is a top view of a window to which a security window applied to a single window is installed, in a state where the inside channel&#39;s window is open according to a first embodiment of the invention; 
           [0019]      FIG. 4  is a top view of a window to which a security window applied to a single window is installed, in a state where the inside channel&#39;s window is closed according to a first embodiment of the invention; 
           [0020]      FIG. 5  is an elevation view of a coupling protrusion of an inside channel&#39;s window to which an insert guide piece is installed, in a security window applied to a single window according to a first embodiment of the invention; 
           [0021]      FIG. 6  is an elevation view of an inside channel&#39;s window to which a lifting preventing unit is installed, in a security window applied to a single window according to a first embodiment of the invention; 
           [0022]      FIG. 7  is an elevation of an inside channel&#39;s window to which a lock and a pulling wire are installed, seen from the inside of the building, in a security window applied to a single window according to a second embodiment of the invention; 
           [0023]      FIG. 8  is an elevation of an inside channel&#39;s window to which a fixing bar is installed, seen from the outside of the building, in a security window applied to a single window according to a second embodiment of the invention; 
           [0024]      FIG. 9  is a perspective view of a lattice unit and a latching piece of a fixing bar in a security window applied to a single window according to a second embodiment of the invention; 
           [0025]      FIG. 10  is a partial perspective view of a lattice unit, a latching piece of a fixing bar, and a body in a security window applied to a single window according to a second embodiment of the invention; 
           [0026]      FIG. 11  is a cross-sectional view of  FIG. 10 , taken along line A-A′; 
           [0027]      FIG. 12  is cross-sectional views showing states where a locking piece is coupled to and released from a body of a fixing bar installed to the inside channel&#39;s window in a security window applied to a single window according to a second embodiment of the invention; 
           [0028]      FIG. 13  is an elevation view of a window to which a security window applied to a single window is installed, in a state where the inside channel&#39;s window is open, seen from the outside of the building, according to a second embodiment of the invention; 
           [0029]      FIG. 14  is a top view of  FIG. 13 , describing the state in concept; 
           [0030]      FIG. 15  is an elevation view of a window to which a security window applied to a single window is installed, in a state where the inside channel&#39;s window is closed, seen from the outside of the building, according to a second embodiment of the invention; 
           [0031]      FIG. 16  is a top view of  FIG. 15 , describing the state in concept; 
           [0032]      FIG. 17  an elevation view of a security window applied to a single window, installed to a sash, according to a third embodiment of the invention; and 
           [0033]      FIG. 18  is an elevation view of a security window applied to a single window, installed to a sash, according to a fourth embodiment of the invention. 
       
    
    
     BRIEF DESCRIPTION OF SYMBOLS IN THE DRAWINGS 
       [0000]    
       
         
           
               110 : sash 
               120 : outside channel&#39;s window 
               121 : moving guide installation piece 
               130 : inside channel&#39;s window 
               131 : frame 
               132 : coupling protrusion 
               133 : Insert guide piece 
               134 : lift preventing unit 
               150 : moving guide 
               160 : lattice unit 
               161 : coupling vertical rod 
               161   a : insertion hole a 
               161   b : coupling hole 
               162 : intermediate vertical rods 
               163 : fixed vertical rod 
               164 : links 
               210 : sash 
               220 : outside channel&#39;s window 
               230 : inside channel&#39;s window 
               231 : frame 
               231   a : through-hole 
               232 : cover 
               250 : moving guide 
               260 : lattice unit 
               261 : coupling vertical rod 
               261   a : insertion hole a 
               261   b : coupling protrusion 
               262 : intermediate vertical rods 
               263 : fixed vertical rod 
               264 : links 
               270 : pulling wire 
               280 : lock 
               281 : switch 
               281   a : locking piece 
               282 : latching protrusion 
               283 : unlatching button 
               290 : fixing bar 
               291 : body 
               291   a : coupling hole 
               291   b : inserting hole 
               291   c : bolt entry portion 
               291   d : bolt fixing portion 
               292 : locking piece 
               292   a : locking hole 
               292   b : bolt guide hole 
               292   c : insertion hole a 
               293 : bolt 
               310 : sash 
               350 : moving guide 
               360 : lattice unit 
               361 : coupling vertical rod 
               361   a : insertion hole a 
               361   b : coupling protrusion 
               362 : intermediate vertical rods 
               363 : fixed vertical rod 
               364 : links 
               370 : pulling wire 
               380 : lock 
               390 : fixing bar 
               391 : body 
               410 : sash 
               460 : lattice-fixed security window 
               462 : coupling protrusion 
               463 : hinge 
               480 : lock 
               490 : fixing bar 
               491 : body 
           
         
       
     
       DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0101]    Hereinafter, preferred embodiments of the invention are described in detail with reference to the accompanying drawings. Detailed descriptions of well-known functions and structures incorporated herein may be omitted or briefly explained to avoid obscuring the subject matter of the invention. Therefore, it will be appreciated to those skilled in the art that, although components are not shown in the drawings, they should be considered as part of the invention. 
       Embodiment 1 
       [0102]      FIG. 1  is an elevation view of a security window applied to a single window (hereafter called a security window), installed to a sash, seen from the inside of the building, in a state where an inside channel&#39;s window is removed, according to a first embodiment of the invention.  FIG. 2  is a partial perspective view of a security window that describes a lattice unit, moving guide, and coupling protrusion installed to an inside channel&#39;s window, according to a first embodiment of the invention.  FIG. 3  is a top view of a window to which a security window is installed, in a state where the inside channel&#39;s window is open according to a first embodiment of the invention.  FIG. 4  is atop view of a window to which a security window is installed, in a state where the inside channel&#39;s window is closed according to a first embodiment of the invention.  FIG. 5  is an elevation view of a coupling protrusion of an inside channel&#39;s window to which an insert guide piece is installed, in a security window according to a first embodiment of the invention.  FIG. 6  is an elevation view of an inside channel&#39;s window to which a lifting preventing unit is installed, in a security window according to a first embodiment of the invention. 
         [0103]    As shown in  FIGS. 1 to 4 , the security window according to a first embodiment of the invention includes a moving guide and a collapsible lattice unit, and is installed to sashes. 
         [0104]    Moving guide installation pieces  121  for supporting the moving guide  150  are fixedly installed at the top and bottom of the one side end. 
         [0105]    The lattice unit  160  includes a number of vertical rods  161 ,  162  and  163  and a number of links  164 . In  FIG. 1 , the vertical rod leftmost is defined as a coupling vertical rod  161  and the vertical rod rightmost is defined as a fixed vertical rod  163 . In addition, the vertical rods between the coupling vertical rod  161  and the fixed vertical rod  163  are defined as intermediate vertical rods  162 . 
         [0106]    The vertical rods  161 ,  162  and  163  are connected to each other with the links  164 . Each link  164  connects two adjacent vertical rods in such a way that one end is pivotally coupled to a location of one vertical rod and the other end is coupled into the other vertical rod, smoothly moving along in the lengthwise direction. Therefore, when vertical rods  161 ,  162 , and  163  are pulled in the horizontal direction, the links  164  are unfolded and spread out in the space between the adjacent vertical rods. Conversely, when vertical rods  161 ,  162 , and  163  are collected, the links  164  are folded. 
         [0107]    Each of the vertical rods  162 ,  162  and  163  of the lattice unit  160  forms insertion holes a  161   a  at the top and bottom portions through which the moving guide  150  is fitted. When the moving guide  150  is fitted through the insertion holes a  161   a , one end is fixed to the moving guide installation piece  121  of the outside channel&#39;s window  120  and the other end is fixed to the sash  110 . The coupling vertical rod  161  and the intermediate vertical rods  162  are movable along the moving guide  150 . The fixed vertical rod  163  is fixed to the sash  110  so that it cannot be moved. 
         [0108]    The moving guide  150  is shaped as a pipe allowing for the passage of a cable of a number of twisted wires, so that it cannot be cut by a cutter, thereby preventing unauthorized entry. 
         [0109]    When the moving guide  150  and the lattice unit  160  are installed, the lattice unit  160  is collapsed or unfolded along the moving guide  150 . The coupling vertical rod  161  of the lattice unit  160  is fixed to the inside channel&#39;s window  130 . 
         [0110]      FIG. 2  is a partial perspective view of a security window before the inside channel&#39;s window  130  is installed to the window, seen from the inside of the building. As shown in  FIG. 2 , the coupling vertical rod  161  leftmost forms coupling holes  161   b  at the top and bottom portions on the front side. The frame  131  of the inside channel&#39;s window  130  forms coupling protrusions  132  on the right at locations of the top and bottom potions, corresponding to the coupling holes  161   b  of the coupling vertical rod  161 . Each of the coupling protrusions  132  has a bent portion that is shaped as the letter ‘L’ bent in the lower direction. 
         [0111]    When the moving guide  150  and the lattice unit  160  are installed to the sash  110 , the coupling protrusions  132  of the inside channel&#39;s window  130  are hooked and locked to the coupling holes  161   a  of the coupling vertical rod  161 . In general, in order to install the inside channel&#39;s window  130  to the sash  110 , the top edge of the inside channel&#39;s window  130  is first fitted into the upper channel of the sash  110  and then the bottom edge is aligned and placed on the rail in the lower channel. Since the bottom of the inside channel&#39;s window  130  is placed on the rail in the lower channel of the sash  110  and the top of the inside channel&#39;s window  130  is inserted in the upper channel, the inside channel&#39;s window  130  is not removed from the sash  110 . 
         [0112]    When the security window according to the invention is installed to the window, the inside channel&#39;s window  130  and the lattice unit  160  are coupled to each other in such a way that: the inside channel&#39;s window  130  is lifted in order to fit the top edge into the upper channel of the sash  110 ; the coupling protrusions  132  with bent potions are inserted into the coupling holes  161   b  of the coupling vertical rod  161 ; the bottom edge is placed on the rail in the lower channel of the sash  110 ; and the bent portions of the coupling protrusions  132  are hooked into the coupling holes  161   b  of the coupling vertical rod  161 . 
         [0113]    When the inside channel&#39;s window  130  is installed to the sash  110 , it may be difficult to align the coupling protrusions  132  of the inside channel&#39;s window  130  to the coupling holes  161   b  of the coupling vertical rod  161  of the lattice unit  160 . The difficulty is resolved as follows. Referring to  FIG. 5 , when insert guide pieces  133  are installed to both sides of the coupling protrusions  132  of the inside channel&#39;s window  130 , the coupling vertical rod  161  is guided the space therebetween, so that the protrusions  132  can be easily inserted into the coupling holes  161   b.    
         [0114]    After the inside channel&#39;s window  130  and the lattice unit  160  are coupled to each other, there may be an attempt to separate the inside channel&#39;s window  130  from the lattice unit  160  by lifting it, and this attempt is prevented as follows. Referring to  FIG. 6 , after the inside channel&#39;s window  130  is coupled to the sash  110 , the lifting preventing unit  134  installed to the top of the inside channel&#39;s window  130  is rotated so that one end contacts the sash  110 , thereby preventing the inside channel&#39;s window  130  from being lifted. Since the inside channel&#39;s window  130  is not separated from the sash  110  until it is lifted, it cannot be separated from the lattice unit  160 . Although the embodiment of the invention describes the lifting preventing unit  134  based on a rotatable type of piece, it should be understood that the invention is not limited to the embodiment. It will be appreciated that the invention may also employ various types of pieces if they prevent the inside channel&#39;s window  130 . 
         [0115]    In a state where the inside channel&#39;s window  130  and the lattice unit  160  are coupled to each other, when the inside channel&#39;s window  130  is open as shown in  FIG. 3 , the vertical rods  161 ,  162  and  163  are spread out, with the links  164 , blocking the opening of the window. Therefore, the structure can prevent unauthorized entry and children from falling out of the window. Meanwhile, when the inside channel&#39;s window  130  is closed as shown in  FIG. 4 , the vertical rods  161 ,  162  and  163  are collapsed so that the inside channel&#39;s window  130  can be completely shut. 
         [0116]    As shown in  FIGS. 2 and 3 , the moving guide installation pieces  121  are fixed to the inside wall of the frame of the outside channel&#39;s window  120  by bolt, and those portions are always hidden by the frame  131  of the inside channel&#39;s window  130 . Therefore, a person&#39;s hand or tools cannot access the bolt of the moving guide installation pieces  121  from the outside of the building. That is, the bolt cannot be loosened from the outside of the building. 
         [0117]    Meanwhile, the security window is removed from the window from the inside of the building in such a way that: the lifting preventing unit  134  is unlocked; the inside channel&#39;s window  130  is lifted; and the coupling protrusions  132  of the inside channel&#39;s window  130  are separated from the coupling holes  161   b  of the coupling vertical rod  161  of the lattice unit  160 . Since the security window can be separated from the inside of the building, it facilitates an emergency escape or a movement of objects. 
       Embodiment 2 
       [0118]      FIG. 7  is an elevation of an inside channel&#39;s window to which a lock and a pulling wire are installed, seen from the inside of the building, in a security window applied to a single window (hereafter called a security window), according to a second embodiment of the invention.  FIG. 8  is an elevation of an inside channel&#39;s window to which a fixing bar is installed, seen from the outside of the building, in a security window according to a second embodiment of the invention.  FIG. 9  is a perspective view of a lattice unit and a latching piece of a fixing bar in a security window according to a second embodiment of the invention.  FIG. 10  is a partial perspective view of a lattice unit, a latching piece of a fixing bar, and a body in a security window according to a second embodiment of the invention.  FIG. 11  is a cross-sectional view of  FIG. 10 , taken along line A-A′.  FIG. 12  is cross-sectional views showing states where a locking piece is coupled to and released from a body of a fixing bar installed to the inside channel&#39;s window in a security window according to a second embodiment of the invention.  FIG. 13  is an elevation view of a window to which a security window is installed, in a state where the inside channel&#39;s window is open, seen from the outside of the building, according to a second embodiment of the invention.  FIG. 14  is a top view of  FIG. 13 , describing the state in concept.  FIG. 15  is an elevation view of a window to which a security window is installed, in a state where the inside channel&#39;s window is closed, seen from the outside of the building, according to a second embodiment of the invention.  FIG. 16  is atop view of  FIG. 15 , describing the state in concept. 
         [0119]    Referring to  FIG. 7  seen from the inside of the building, the inside channel&#39;s window  230  installs a lock  280  for controlling a pulling wire  270  to the left of the frame  231 , and also a fixing bar  290  to the opposite. As shown in  FIG. 8  seen from the outside of the building, the inside channel&#39;s window  230  installs the fixing bar  290  including a locking piece  192  to the left. 
         [0120]    The lock  280  includes a switch  281 , a latching protrusion  282 , and an unlatching button  283 . The switch  281  connects the top to the pulling wire  270  and the bottom to the latching piece  281   a . Since the latching protrusion  282  is fixed to the lower portion of the switch  281 , when the switch  281  is lowered, the latching piece  281   a  of the switch  281  is latched to the latching protrusion  282 , thereby preventing the switch  281  from being lifted up. Meanwhile, the unlatching button  283  pushes and unlocks the latching piece  281   a  of the switch  281  from the latching protrusion  282 . 
         [0121]    The pulling wire  270  fixes one end to the switch  281  of the lock  280 . The pulling wire  270  extends, along the inside space of the cover  232  installed to the frame  231 , through the through-hole  231   a  formed on the outer surface, opposite the frame  231  of the inside channel&#39;s window  230 , and is connected to a locking piece  292  of the fixing bar  290 . 
         [0122]    The fixing bar  290  includes a body  291 , fixed to the outside wall of the frame  231  of the inside channel&#39;s window  230 , and a locking piece  292  movable up and down in a certain distance in the body  291 . The body  291  forms coupling holes  291   a , as shown in  FIG. 10 , for receiving the coupling protrusions  261   a  of the lattice unit  160 , at the upper and lower portions, on the left, on  FIG. 8 . The body  291  is fixed to the frame  231  of the inside channel&#39;s window  230  by bolts  291   d.    
         [0123]    Referring to  FIG. 9 , the locking piece  292  is shaped as the letter ‘L.’ The locking piece  292  forms locking holes  292   a  at the upper and lower portions on the left wall and bolt guide holes  292   b  on the back wall. Referring the locking piece  292  and the body  291  shown in  FIG. 10 , the body  291  forms the bolt entry portion  291   c  and the bold fixing portion  291   d  on the front and back walls respectively, corresponding to the bolt guide holes  292   b  of the locking piece  292 . 
         [0124]    Referring to  FIG. 11  showing a cross-sectional view of  FIG. 10 , taken along line A-A′, a screwdriver passes, from the inside of the building, to a bolt  293  through the bolt entry portion  291   c  of the front wall of the body  291 , the bolt guide hole  292   b  of the locking piece  292 , and the bolt fixing portion  291   d  of the back wall of the body  291 , in order, and screws or unscrews the bold  293 . 
         [0125]    When the locking piece  292  is unlocked and loosened (or lowered), the bolt guide hole  292   b  of the locking piece  292  faces the bolt fixing portion  291   d  of the body  291 . A screwdriver enters the bolt entry portion  291   c  of the body  291  and screws or unscrews the bolt  293 . On the contrary, when the locking piece  292  is locked (or lifted), the bolt guide hole  292   b  of the locking piece  292  is separated from the bolt fixing portion  291   d  of the body  291 . In that case, although the screwdriver passes through the bolt entry portion  291   c  of the body  291 , since the bolt fixing portion  291   d  of the locking piece  292  is hidden, it cannot unscrew the bolt in the bolt fixing portion  291 . 
         [0126]    To resolve the problem, the locking piece  292  according to the embodiment of the invention is produced in such a way that the cross-section is shaped as the letter ‘L.’ That is, one part of the L-bent portion of the locking piece  292  faces the coupling hole  291   a  of the body  291  and binds the coupling protrusion  261   b . The other part covers the bolt fixing portion  291   d  of the back wall of the body  291 . 
         [0127]    Like Embodiment 1, Embodiment 2 is implemented in such a way that: the lattice unit  260  includes a coupling vertical rod  261 , intermediate vertical rods  262 , and a fixed vertical rod  263  and links  264 . Each of the vertical rods  261 ,  262 , and  263  forms insertion holes a  261   a  at the top and bottom portions through which the moving guide  250  is fitted. One end of the moving guide  250  is fixed to the sash  210  and the other end is fixed to the outside channel&#39;s window  220  through the inserting hole  291   b  of the body  291  and the insertion hole c  292   c  of the locking piece  292 . The fixed vertical rod  263  is fixed to the sash  210 . The coupling vertical rod  261  forms coupling protrusions  261   b  on the side wall to be inserted into the fixing bar  290 . 
         [0128]    As shown in  FIG. 10  and diagram (a) of  FIG. 12 , in a state where the coupling protrusion  261   b  of the coupling vertical rod  261  is inserted through the coupling hole  291   a  of the body  291  of the fixing bar  290  and the locking hole  292   a  of the locking piece  292 , when the switch  281  of the lock  280  is pulled down to pull the pulling wire  270 , the locking piece  292  is lifted up, so that the L-bent portion of the coupling protrusion  261   b  is locked into the locking hole  292   a  of the locking piece  292  and bound thereto as shown in diagram (b) of  FIG. 12 . Therefore, the coupling vertical rod  261  is coupled to the fixing bar  290  installed to the inside channel&#39;s window  230 . 
         [0129]    Meanwhile, when the unlatching button  283  of the lock  280  is pressed, the rear end of the unlatching button  283  pushes the latching piece  281   a  of the switch  281 , thereby unlocking the switch  281 . Therefore, the pulling wire  270  is pulled by the weight of the locking piece  292  and the switch  281  is lifted up. As shown in diagram (a) of  FIG. 12 , the locking piece  292  is lowered, thereby unlocking the coupling protrusion  261   b  of the locking piece  292 . In that case, the coupling vertical rod  261  of the lattice unit  260  is separated from the fixing bar  290  of the inside channel&#39;s window  230 . 
         [0130]    After the installation of the security window according to the embodiment of the invention, referring to  FIG. 13  showing an elevation view of the security window seen from the outside of the building and  FIG. 14  showing the top view, when the inside channel&#39;s window  230  is open in a state where the coupling vertical rod  261  is coupled to the fixing bar  290  as the switch  281  of the lock  280  is pulled, the vertical rods  261 ,  262  and  263  of the lattice unit  260  are spread out on the opening of the window with the links  264  connecting the vertical rods. 
         [0131]    On the contrary, as shown in  FIG. 15  showing an elevation view of the security window seen from the outside of the building and  FIG. 16  showing the top view, when the inside channel&#39;s window  230  is closed, the vertical rods  261 ,  262  and  263  of the lattice unit  260  are closely collapsed, so that the inside channel&#39;s window  230  is completely closed. 
         [0132]    The embodiment is implemented in such a way that the coupling vertical rod  261  of the lattice unit  260  is coupled to or separated from the fixing bar  290  of the inside channel&#39;s window  230  by operating the switch  281  of the lock  280 . That is, after the coupling protrusion  261   b  of the lattice unit  260  is inserted through the coupling hole  291   a  of the fixing bar  290  and the locking hole  292   a , when the switch  281  is lowered and fixed so that the latching piece  281   a  is locked to the latching protrusion  282 , the lattice unit  260  is spread out or collapsed as the inside channel&#39;s window  230  is open or closed, thereby preventing unauthorized entry or falls out of the window. When the fixing bar  290  and the lattice unit  260  are disconnected to each other as the unlatching button  283  of the lock  280  is pushed, although the inside channel&#39;s window  230  is open, the lattice unit  260  is not spread out, so that the opening of the window allows for a movement of objects and an emergency escape. 
         [0133]    Although the inside channel&#39;s window  230  is open while the lattice unit  260  is fixed to the inside channel&#39;s window  230 , a person&#39;s hand cannot extend to reach the lock  280  installed to the end opposite the open space and thus cannot operate the switch  281 , from the outside of the building. In addition, when the locking piece  292  is lifted up in a state the switch  281  is locked, the bolt  293  fixing the body  291  to the frame  231  of the inside channel&#39;s window  230  is completely hidden by the locking piece  292 , and thus cannot be loosened. Therefore, the security window cannot be removed from the window from the outside of the building. 
       Embodiment 3 
       [0134]      FIG. 17  an elevation view of a security window applied to a single window (hereafter called a security window), installed to a sash, according to a third embodiment of the invention. 
         [0135]    The embodiment is a security window that is installed to a sash  310  to cover the opening of a window, regardless of the outside channel&#39;s window or the inside channel&#39;s window. 
         [0136]    Referring to  FIG. 17 , moving guides  350  are installed to the top and bottom portion of the sash  310 , extending in the horizontal direction of the opening of the window. A lattice unit  360  is movably installed to the moving guides  350 . The lattice unit  360  includes a coupling vertical rod  361 , intermediate vertical rods  362 , fixed vertical rod  363  and links  364 . When seen from  FIG. 7 , the fixed vertical rod  363  is fixed to the left of the sash  310 . The coupling vertical rod  361  forms a coupling protrusion  361   b  on the right wall. The coupling protrusion  361   b  of the coupling vertical rod  361  is inserted into a locking piece (not shown) and a body  391  of a fixing bar  390  fixed to the right of the sash  310 . The coupling protrusion  361   b  is bound to or unlocked in the same principle as the fixing bar  290  of Embodiment 2 is operated. That is, the coupling protrusion  361   b  is bounded in such a way that the pulling wire  370  is pulled by operating the lock  380  and thus the locking piece (not shown) is lifted up. The coupling protrusion  361   b  is also unlocked in such a way that the locking piece (not shown) is lowered by pushing the unlatching button of the lock  380 . 
         [0137]    Since the security window according to the embodiment of the invention is installed to the sash  310  of a window in such a way that the lattice unit  360  covers the opening of the window regardless of whether the inside channel&#39;s window is opened or closed, it can prevent unauthorized entry and falls out of the window. In addition, since the lattice unit  360  is separated from the fixing bar  390  by pushing the unlatching button of the lock  380  if necessary, the opening of the window allows for a movement of objects and an emergency escape if the lattice unit  360  is collapsed. 
         [0138]    When the lock  380  is installed to a location apart from the sash  310 , it cannot be operated by a person from the outside of the building. 
       Embodiment 4 
       [0139]      FIG. 18  is an elevation view of a security window applied to a single window (hereafter called a security window), installed to a sash, according to a fourth embodiment of the invention. 
         [0140]    The embodiment is a security window that is installed to a sash  410  to cover the opening of a window. Unlike the collapsed type lattice unit of Embodiment 3, the lattice-fixed security window  460  is installed to the sash  410  in such a way that one end is pivotally fixed to one side of the sash  410 , as a hinge  463 . The lattice-fixed security window  460  forms a coupling protrusion  462  on the other end, protruded to the sash  410 . A body  491  of a fixing bar  490 , operated in the same principle as Embodiment 2, is fixed to the sash  410 . When the coupling protrusion  462  is inserted into the fixing bar  490  and a switch of the lock  480  is lowered, the pulling wire lifts the locking piece, so that the lattice-fixed security window  460  is fixed to the fixing bar  490 , in the same way as Embodiment 2. 
         [0141]    When the lock  480  is installed to a location apart from the sash  410 , it cannot be operated by a person from the outside of the building. When the unlatching button of the lock  480  is pushed from the inside of the building, the lattice-fixed security window  460  is separated from the fixing bar  490  and rotated to leave the opening of the window open. 
         [0142]    As described above, the security window according to the invention is applied to an existing single window and blocks the opening of the window, thereby preventing unauthorized entry and falls out of the window. The security window can be separated from the window from the inside of the building, if necessary, it can allow for a movement of an object or an emergency escape through the opening of the window. Meanwhile, since the security window cannot be removed from the window from the outside of the building, it can prevent any intrusion by persons with malicious intent from the beginning. 
         [0143]    Although exemplary embodiments of the invention have been described in detail above, it should be understood that many variations and modifications of the basic inventive concept herein described, which may be apparent to those skilled in the art, will still fall within the spirit and scope of the exemplary embodiments of the invention as defined in the appended claims.

Summary:
A security window applied to a single window is applied to a previously installed single window so as to block an open space of the window and prevent entry by strangers and a person inside from having a falling accident. The security window can be separated from within a room as necessary, and thus movement of an object or emergency escape is facilitated. Meanwhile, the security window cannot be separated from outside the room, and thus intrusion by persons with malicious intent can be prevented from the onset.