EMB145 FLT CREW DEPARTS WITH GEAR PINS STILL INSTALLED. FO DIST WITH NONSTANDARD PREFLT PROCS.

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TKOF WITH GEAR PINS STILL INSTALLED. WE HAD A 20 MIN TURN DUE TO A DELAY IN GETTING A GATE. FO WENT AHEAD TO GET THE ACFT READY. I REMAINED ON THE ACFT TO DEPLANE PAX. THE CREW WASN'T SCHEDULED TO SHOW FOR ANOTHER HR; SO I SHUT DOWN ACFT. FLT ATTENDANT AND I WENT OVER TO THE ACFT WHERE I DID MY COCKPIT SET-UP AND LOGBOOK CHK. WE THEN DID OUR CHKLIST AND THE FO FINISHED UP WITH WT AND BAL. THE TAXI AND TKOF WERE UNEVENTFUL. ONCE AIRBORNE WE HAD PROBS RAISING THE GEAR. AS PNF; I REVIEWED QRH AND FOLLOWED PROC. AT THIS POINT I ADVISED APCH WE NEEDED TO RETURN TO THE FIELD. AT THIS POINT; I ASKED THE FO TO DOUBLECHK TO SEE IF GEAR PINS WERE STILL INSTALLED IN THE LNDG GEAR. IT WAS DEFINITELY MY RESPONSIBILITY TO MAKE SURE THOSE PINS WERE STORED AND SECURE. CORRECTIVE ACTION MIGHT BE THAT THE GEAR PINS WILL ONLY BE INSTALLED IF THERE IS A PROB WITH LNDG SYS; HYD LEAKS; MAINT REQUIREMENTS. SUPPLEMENTAL INFO FROM ACN 683924: AFTER COMPLETING PREVIOUS FLT; I PROCEEDED TO NEXT ACFT TO PREPARE FOR THE NEXT FLT. I WALKED ON RAMP TOWARDS ACFT EXAMINING AS I APCHED; THEN PROCEEDED UP JETWAY TO GET READY FOR FLT. I PLANNED ON STARTING ACFT; THEN WAITING FOR MY CREW; THEN GOING OUT AFTER THEY WERE THERE TO PREFLT. HOWEVER; WHEN I CALLED FOR PAPERWORK AFTER THE CREW WAS ALL THERE; OPS SAID WE NEEDED TO COME AND GET IT. I LEFT AIRPLANE AS PEOPLE WERE BOARDING; RUSHED INSIDE; GOT PAPERWORK THEN HURRIEDLY WENT BACK TO AIRPLANE FORGETTING TO WALK AROUND.