[QUOTE=JiveTurkey;5582335]The OP said the chain gets jammed between the CHAINRING and frame..[/
QUOTE]

Even if that were the case, you are still wrong. There is NO reason chains should jam on a properly adjusted, non-damaged, everything compatible bike repeatedley.

There may be that rare instance that a big enough bump while shifting causes the chain to jam between the inner chainring and bb, but it should be a rare occurence.