the cam and thus swings the lever 43 and rotates the rod 40 a lever 45 is fixed to the opposite end of rod 40 and is swingable around the axis to the rod 40 by the rotation of the latter lever 45 is connected to the connecting rod 38 thereby transmitting the movement of roller 42 to pin 32 the spring 39 rotates the rod 40 through the connecting rod 38 and lever 45 and constantly urges the roller 42 against the cam 44 the print board 1 is transferred on the conveyor 2 in the x 39 direction and the conveyor 2 is stopped by a detector 46 so as to stop the print board 1 subsequently the shaft 19 is rotated by the actuator 22 through the lever 21 to lower the arm 23 so that the pusher 34 provided on the arm 23 is moved behind the print board 1 at this time as shown in fig3 the lever 21 turns on the switch 31a then as shown in fig2 the actuator 26 pulls the arm 23 while the pusher 34 moves in the x 39 direction thus pushing the print board 1 further when the pin 32 is moved to predetermined down position 48 as shown in fig2 the pin 32 is lowered in the following manner that is when the transfer of the print board 1 is started by the pusher.