Stacker crane

Abstract

It is an object to provide a stacker crane that is configured to move on a single rail provided along one or more racks, and that includes: a first wheel that moves on the rail; a vehicle frame supported by the first wheel; a first motor that is supported by the vehicle frame such that the first motor is disposed on a right side of the first wheel, and that is capable of driving the first wheel; and a second motor that is supported by the vehicle frame such that the second wheel is disposed on a left side of the first wheel, and that is capable of driving the first wheel.

1 . A stacker crane that is configured to move on a single rail provided along one or more racks, comprising: 
 a first wheel that moves on the rail;    a vehicle frame supported by the first wheel;    a first motor that is supported by the vehicle frame such that the first motor is disposed on a right side of the first wheel, and that is capable of driving the first wheel; and    a second motor that is supported by the vehicle frame such that the second wheel is disposed on a left side of the first wheel, and that is capable of driving the first wheel.    
   
   
       2 . The stacker crane according to  claim 1 , further comprising: 
 a second wheel that is disposed spaced apart from the first wheel in a fore-and-aft direction, and that supports the vehicle frame;    a third motor that is supported by the vehicle frame such that the third motor is disposed on a right side of the second wheel, and that is capable of driving the second wheel; and    a fourth motor that is supported by the vehicle frame such that the fourth wheel is disposed on a left side of the second wheel, and that is capable of driving the second wheel.    
   
   
       3 . The stacker crane according to  claim 2 , 
 wherein the first wheel is disposed at a front end portion of the vehicle frame; and    wherein the second wheel is disposed at a rear end portion of the vehicle frame.    
   
   
       4 . The stacker crane according to  claim 3 , 
 wherein the vehicle frame comprises: 
 a first support frame that supports the first wheel and the first and the second motors;  
 a second support frame that supports the second wheel and the third and the fourth motors; and  
 a connection frame that connects the first support frame and the second support frame.  
   
   
   
       5 . The stacker crane according to  claim 1 , further comprising: 
 a first support post that is fixed to the vehicle frame;    a second support post that is fixed on the vehicle frame, spaced apart from the first support post in a fore-and-aft direction; and    a vertically movable platform that is guided by the first support post and the second support post, and that is capable of moving vertically with respect to the vehicle frame;    wherein the vertically movable platform is provided with a first article transferring device that is capable of transferring articles to the one or more of the racks.    
   
   
       6 . The stacker crane according to  claim 5 , further comprising: 
 a second article transferring device that is provided on the vertically movable platform, and that is capable of transferring articles to the one or more of the racks.    
   
   
       7 . The stacker crane according to  claim 5 , further comprising: 
 a guide portion that abuts against a roller provided on the vertically movable platform, and that is formed in each of the first and the second support posts.    
   
   
       8 . The stacker crane according to  claim 1 , 
 wherein a rotation axis of the first wheel and a rotation axis of the first motor are disposed coaxially, and the rotation axis of the first wheel and a rotation axis of the second motor are disposed coaxially.    
   
   
       9 . The stacker crane according to  claim 2 , 
 wherein a rotation axis of the second wheel and a rotation axis of the third motor are disposed coaxially, and the rotation axis of the second wheel and a rotation axis of the fourth motor are disposed coaxially.    
   
   
       10 . The stacker crane according to  claim 1 , further comprising: 
 a first restriction wheel that is supported by and rotatable with respect to the vehicle frame, and that restricts lifting of the first wheel from the rail.    
   
   
       11 . The stacker crane according to  claim 10 , further comprising: 
 a second restriction wheel that is supported by and rotatable with respect to the vehicle frame, and that works in collaboration with the first restriction wheel to restrict lifting of the first wheel from the rail.    
   
   
       12 . The stacker crane according to  claim 11 , further comprising: 
 adjustment means that is disposed between the vehicle frame, and the first restriction wheel and the second restriction wheel, and that adjusts the positions of the first restriction wheel and the second restriction wheel with respect to the vehicle frame.    
   
   
       13 . The stacker crane according to  claim 2 , further comprising: 
 a third restriction wheel that is supported by and rotatable with respect to the vehicle frame, and that restricts lifting of the second wheel from the rail.    
   
   
       14 . The stacker crane according to  claim 13 , further comprising: 
 a fourth restriction wheel that is supported by and rotatable with respect to the vehicle frame, and that works in collaboration with the third restriction wheel to restrict lifting of the second wheel from the rail.    
   
   
       15 . The stacker crane according to  claim 14 , further comprising: 
 adjustment means that is disposed between the vehicle frame, and the third restriction wheel and the fourth restriction wheel, and that adjusts the positions of the third restriction wheel and the fourth restriction wheel with respect to the vehicle frame.    
   
   
       16 . The stacker crane according to  claim 1 , further comprising: 
 an upper frame that is capable of engaging with a guide rail that is fixed to an upper position of the racks, and that is fixed to upper portions of the first and the second support posts.    
   
   
       17 . A stacker crane that is configured to move on a single rail provided along one or more racks, and that is configured to be guided by a guide rail disposed spaced apart from the rail in a vertical direction, comprising: 
 a first wheel that moves on the single rail;    a vehicle frame supported by the first wheel;    a first support post that is fixed to the vehicle frame;    a second support post that is fixed on the vehicle frame, spaced apart from the first support post in a fore-and-aft direction;    a vertically movable platform that is guided by the first support post and the second support post, and that is capable of moving vertically with respect to the vehicle frame, wherein the vertically movable platform is provided with a first article transferring device that is capable of transferring articles to the one or more of the racks;    an upper frame that is capable of engaging with the guide rail, and that is fixed to an upper portion of each the first and the second support posts;    a first motor that is supported by the vehicle frame such that the first motor is disposed on a right side of the first wheel, and that is capable of driving the first wheel; and    a second motor that is supported by the vehicle frame such that the second wheel is disposed on a left side of the first wheel, and that is capable of driving the first wheel.    
   
   
       18 . The stacker crane according to  claim 17 , further comprising: 
 a second wheel that is disposed spaced apart from the first wheel in a fore-and-aft direction, and that supports the vehicle frame;    a third motor that is supported by the vehicle frame such that the third motor is disposed on a right side of the second wheel, and that is capable of driving the second wheel; and    a fourth motor that is supported by the vehicle frame such that the fourth wheel is disposed on a left side of the second wheel, and that is capable of driving the second wheel.    
   
   
       19 . The stacker crane according to  claim 17 , further comprising: 
 a second article transferring device that is provided on the vertically movable platform, and that is capable of transferring articles to the rack.