Student's protection school board from emergencies

Abstract

A student protection school board mainly comprises a main mobile outer frame of rectangular cross section which constitutes the front surface of the room, with shape of colored dye blackboard, a main fixed frame of rectangular cross section which constitutes the rear surface of the room, mounted on the wall of the classroom, two equally sized folding rectangular surfaces which constitute the side surfaces of the room, and two equally sized folding rectangular surfaces, reinforced with metal plates, which constitute the upper surface of the room.

1 . Student's protection school board from emergencies which extends horizontally to a rectangular cross section room, of parallelepiped shape, characterized by the fact that it comprises mainly single robust surfaces of high hardness steel metal layer ( 12 ) which on their inner surface have a special compact layer of insulating elastomer material ( 13 ) while their edges ( 24 ) are coated with polymeric sealant material and that it consists of:
 i. A main mobile outer frame of rectangular cross section ( 1 ) which constitutes the front surface of the room, with shape colored of dye blackboard ( 2 ), which bears:
 special drive bearings ( 3 ) to facilitate the movement 
 protective thermoplastic elastomer bar ( 4 ) for accidents prevention during the stay of students 
 optionally film light-emitting diodes ( 5 ) for signaling of protection school board 
   ii. A main fixed frame of rectangular cross section ( 6 ) which constitutes the rear surface of the room, mounted on the wall of the classroom, which bears internally:
 at least two screw shaft linear drive mechanisms ( 7 ) 
 a hybrid propulsion motor ( 10 ) and 
 bottles of compressed oxygen ( 11 ) 
   iii. Two equally sized rectangular folding surfaces ( 15 ) which constitute the side surfaces of the room.   iv. Two equally sized rectangular folding surfaces ( 16 ) which constitute the upper surface of the room and bear internally:
 safety lights ( 17 ) with power batteries for backup power supply and 
 oxygen masks ( 18 ) 
   v. At least two hydraulic compensator cylinders ( 30 )   vi. An entry/exit door ( 19 ) adapted on one of the two equal-sized rectangular folding surfaces ( 15 ) forming the side surfaces of the room   vii. External unit with pushbutton star/stop ( 21 ) for setting in operation   viii. Electro pneumatic operation system including the hybrid propulsion motor ( 10 ) and bottles of compressed oxygen ( 11 )   ix. Manual operation mechanism with pressure lever ( 22 )   x. Sound information system ( 23 )   
     
     
         2 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the main fixed frame of rectangular cross section ( 6 ) which constitutes the rear surface of the room, bears at least two screw shaft linear drive mechanisms ( 7 ) where the thread of each screw shaft is trapezoidal, whereas on the contact position of each screw shaft are at least two special nuts ( 8 ) having the same thread, but internal. 
     
     
         3 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the thread of each drive screw shaft ( 7 ), from the beginning to the middle of its length is clockwise ( 32 ) and then is becoming left-hand ( 33 ), making special nuts ( 8 ) to perform reverse movement between them by the operation startup of screw shaft linear drive mechanism ( 7 ). 
     
     
         4 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the two equally sized rectangular folding surfaces ( 15 ) which constitute the side surfaces of the room are connected from their one vertical side ( 26 ) respectively with the inner of the two vertical sides of the main mobile outer frame of rectangular cross section ( 1 ) via device with pierced flat parts ( 27 ) in order to allow turning motion along the vertical axis and from their other vertical side ( 28 ) respectively with the inner of the two vertical sides of main fixed frame of rectangular cross section ( 6 ) via articulated joints ( 9 ) adapted to special nuts ( 8 ) of screw shaft linear drive mechanisms ( 7 ). 
     
     
         5 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the movement of special nuts ( 8 ) achieves the folding of the rectangular surfaces ( 15 ) which constitute the side surfaces of the room by 90° degrees to the vertical axis and the parallel movement of the main mobile outer frame of rectangular cross section ( 1 ) forwardly through the drive bearings ( 3 ). 
     
     
         6 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the two equally sized rectangular folding surfaces ( 16 ) which constitute the upper surface of the room, are firmly connected respectively to the internal upper horizontal surfaces ( 29 ) of the folding rectangular surfaces ( 15 ) which constitute the side surfaces of the room, through a device with pierced flat parts ( 27 ) in order to allow turning motion along the horizontal axis. 
     
     
         7 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that by the full extension of the folding rectangular surfaces ( 15 ) which constitute the side surfaces of the room, at least two hydraulic compensator cylinders ( 30 ) are automatically actuated, resulting in the full extension of the folding rectangular surfaces ( 16 ) to rotation of 90° degrees along the horizontal axis thus creating a single surface that constitutes the roof of the room. 
     
     
         8 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the edges ( 24 ) of the two equally sized folding rectangular surfaces ( 16 ) which constitute the upper surface of the room, are reinforced with metal plates ( 14 ) and also that appropriate safety bolts ( 31 ) have been placed to increase resistance of forming single surface. 
     
     
         9 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that the board is a hybrid power system since it is equipped with main and backup electro pneumatic operation system including the hybrid propulsion motor ( 10 ), the bottles of compressed oxygen ( 11 ) and safety lights ( 17 ) with power batteries, so as to cover the required operation power with constant voltage, without being dependent the operation at a least bit from the changing of external factors. 
     
     
         10 . Student protection school board from emergencies according to  claim 1 , characterized by the fact that in case of failure of power supply from the electro pneumatic operation system, a manual operation mechanism with pressure lever ( 22 ), is installed.