Device and method for automatic transfer of car in parking system

Abstract

Device and method for automatic transfer of a car in a parking system, the device including a main frame for moving between platforms each for placing a car to be parked thereon, and an elevating part fitted to the main frame for lifting the car on the platform to a preset height, inclusive of at least one or more than one leg fitted to be movable to an outside of the main frame for supporting wheels of the car, and a supplementary frame for moving up together with the legs, thereby transferring the car lifted by the elevating part to an other platform the main frame desires, and permitting fast loading/unloading of the car.

What is claimed is:  
     
         1 . A device for automatic transfer of a car in a parking system comprising: 
 a main frame for moving between platforms each for placing a car to be parked thereon; and    an elevating part fitted to the main frame for lifting the car on the platform to a preset height, including;    at least one or more than one leg fitted to be movable to an outside of the main frame for supporting wheels of the car, and    a supplementary frame for moving up together with the legs,    thereby transferring the car lifted by the elevating part to another platform the main frame desires.    
     
     
         2 . A device as claimed in  claim 1 , wherein the main frame includes wheels and supplementary wheels driven by power means for moving the main frame.  
     
     
         3 . A device as claimed in  claim 1 , wherein the legs are in one pair movably fitted to both sides of the main frame, for supporting one pair of the front wheels or rear wheels of the car.  
     
     
         4 . A device as claimed in  claim 3 , wherein the legs support the front wheels of the car.  
     
     
         5 . A device as claimed in  claim 1 , wherein the leg has a fork form.  
     
     
         6 . A device as claimed in  claim 1 , wherein the leg includes; 
 a pinion gear driven by a power means, and    rack gears each coupled with the leg and engaged with the pinion gear for moving in a horizontal direction as the pinion gear rotates.    
     
     
         7 . A device as claimed in  claim 1 , wherein the supplementary frame includes; 
 a helical cam rotatably fitted to the main frame; and    a roller fitted to the supplementary frame for moving up/down along a sloped surface of the helical cam when the helical cam rotates.    
     
     
         8 . A device as claimed in  claim 5 , wherein the supplementary frame further includes; 
 a sprocket engaged with the helical cam, and    a chain engaged with the sprocket and driven by power means for rotating the sprocket and the helical cam.    
     
     
         9 . A device as claimed in  claim 5  or  6 , wherein the supplementary frame includes a plurality of the helical cams, and the rollers and the sprockets in correspondence to the helical cams for stable supporting of the supplementary frame.  
     
     
         10 . A device as claimed in  claim 1 , wherein the supplementary frame further includes a guide for moving up/down the supplementary frame, having a channel member extended in a vertical direction, and a pin fixed to the supplementary frame and fastened in the channel member.  
     
     
         11 . A device as claimed in  claim 10 , wherein the supplementary frame further includes a supplementary guide for making a stable up/down movement, having first teeth formed in the supplementary frame extended in a vertical direction, and second teeth formed in the main frame extended in a vertical direction so as to be engaged with the first teeth.  
     
     
         12 . A device as claimed in  claim 1 , further comprising a guide part fitted to the main frame for guiding car wheels rotated while the car is moved.  
     
     
         13 . A device as claimed in  claim 12 , wherein the guide part includes guide bars movable to an outside of the main frame so as to be disposed adjacent to the wheels of the car.  
     
     
         14 . A device as claimed in  claim 13 , wherein the guide part includes one pair of guide bars movably fitted to both sides of the main frame so as to be disposed adjacent to the front wheels or rear wheels of the car.  
     
     
         15 . A device as claimed in  claim 14 , wherein the guide bars move to be close to the rear wheels.  
     
     
         16 . A device as claimed in  claim 13 , wherein the guide part further includes; 
 a ball screw rotated by power means,    a nut engaged with the ball screw for making a linear movement as the ball screw is rotated, and    link bars each having one end hinge coupled to the nut, and the other end connected to the guide bar for transmission of the linear movement of the nut to the guide bar.    
     
     
         17 . A device as claimed in  claim 16 , wherein the link bar is guided by a sloped surface formed on a cam floor fitted to the main frame during operation.  
     
     
         18 . A device as claimed in  claim 1 , wherein the platform includes a passage for pass of the main frame.  
     
     
         19 . A device as claimed in  claim 1 , wherein the platform includes seats for receiving the legs moved in a horizontal direction while the platform makes no interference with the movement of the legs.  
     
     
         20 . A device as claimed in  claim 1 , wherein the platforms include; 
 a first platform provided in a space for receiving a car to be parked,    a third platform provided in an intermediate device for transporting the car to a parking space, and    a second platform provided in the parking space.    
     
     
         21 . A method for automatic transfer of a car comprising the steps of: 
 (a) moving a car transfer device to a first platform provided in a space for receiving a car to be parked;    (b) lifting the car on the first platform including the steps of, 
 moving legs in the car transfer device to an outside of the car transfer device for supporting wheels of the car, and  
 moving up a supplementary frame in the car transfer device coupled with the legs;  
   (c) transporting the car transfer device to a second platform provided to a parking space in a state the car is lifted by the car transfer device; and    (d) placing down the car on the second platform including the steps of; 
 moving down the supplementary frame, and  
 moving the legs into an inside of the car transfer device.  
   
     
     
         22 . A method as claimed in  claim 21 , wherein the car transfer device is movable by a power means and wheels movably fitted to the power means.  
     
     
         23 . A method as claimed in  claim 21 , wherein the car is lifted by one pair of legs movably fitted on both sides of the main frame for supporting one pair of front wheels or rear wheels of the car.  
     
     
         24 . A method as claimed in  claim 22 , wherein the one pair of legs support the front wheels.  
     
     
         25 . A method as claimed in  claim 21 , wherein the legs are movable by a pinion gear driven by power means, and rack gears coupled with the legs respectively and engaged with the pinion gear for moving in a horizontal direction as the pinion gear rotates.  
     
     
         26 . A method as claimed in  claim 21 , wherein the supplementary frame is movable by a helical cam rotatably fitted to the main frame, and a roller fitted to the supplementary frame for moving up/down along a sloped surface of the helical cam when the helical cam rotates.  
     
     
         27 . A method as claimed in  claim 21 , wherein the step (b) further includes the step of moving guide bars of the car transfer device to an outside of the car transfer device for guiding car wheels rotating during movement of the car.  
     
     
         28 . A method as claimed in  claim 27 , wherein the car is guided by one pair of guide bars movably fitted to both sides of the main frame for being disposed close to the one pair of front wheels or rear wheels of the car.  
     
     
         29 . A method as claimed in  claim 28 , wherein the one pair of guide bars are disposed close to the rear wheels.  
     
     
         30 . A method as claimed in  claim 21 , wherein the guide bars are movably by 
 a ball screw rotated by power means,    a nut engaged with the ball screw for making a linear movement as the ball screw is rotated, and    link bars each having one end hinge coupled to the nut, and the other end connected to the guide bar for transmission of the linear movement of the nut to the guide bar.    
     
     
         31 . A method as claimed in  claim 21 , wherein the step (d) further includes the step of moving the guide bars of the car transfer device to an inside of the car transfer device.  
     
     
         32 . A method as claimed in  claim 21 , wherein the step (c) includes the steps of; 
 moving the car transfer device to a third platform provided to a transporting device in a state the car is lifted by the car transfer device,    transporting the car and the car transfer device to a second platform apart from the first platform by the transporting device, and    transporting the car transfer device to the second platform in a state the car is lifted by the car transfer device.    
     
     
         33 . A method as claimed in  claim 32 , further comprising the step of returning the car transfer device to the third platform after the step (d).