202 



HANDBOOK OF MECHANICAL DESIGN 



I Transport 





Pafhof 

 transport 



Eccentric 

 Imk 



Shaft E- 



-A=. 



Top of 

 rail 



Shaft F 



X = A rti'c les moved 



Tie rod ' Cam arm 



Fig. 425. — Here is illustrated an action such that the forward motion is imparted by an eccentric while the raising 

 and lowering of the transport is accomplished by means of a cam. The shafts F, E, and D are located by the frame 

 of the machine. Special bellcranks support the transport and are interconnected by means of a tie rod. 



X ^y Transport 



Top of rail -^ 



Path of ' 

 transport 



X=Arficles 

 moved 



Fig. 426. — This is another form of transport mechanism wherein a link motion is used. The bearings C are supported 



by the frame, as is the driving shaft D. 



I Transport 



/Transport 



X= Articles moved '" '^ear B ' 



'Path of 

 transport 



Fig. 427. — An arrangement of interconnected gears 

 of equal diameters which will impart a transport 

 motion to a mechanism, the gear and link mechanism 

 imparting both the forward motion and the raising 

 and lowering. The gear shafts are supported in the 

 frame of the machine. 



^ ^?fL ^ 



Eccentric arms -/-/-T 



Cam - 



-Path of 

 transport 



X= Articles 

 moved 



^-Shaft C-'' 

 Fig. 428. — In this transport mechanism the forward 

 and return strokes are accomplished by the eccentric 

 arms, while the vertical motion is performed by the 

 cams. 



