The 28-year-old striker has not had a look-in under Rangers boss Neil Warnock this season and has now moved across west London to join the Bees until January.
"He's made it clear I won't be involved in a team situation," said Vine.
"I haven't been involved since the summer - even in training.
"I still think I'm good enough to play for them. I have trained with most of the squad before so ability-wise I know I could do a job. But there's no point crying over spilt milk."
Source: PA
Source: PA