Player pushing case along an axis

Hi,

In order to get a case which can be pushed along an axis by a player, I think I should use a slider join between the case and the floor and with the good param the case will be able to move only along one axis then I must make a join between the case and the player to make player following the same way than the case while pushing it . . . but I don't know which link/join I must use . . . could you help me ? advise about that ?

Thanks

Shaoz

(sorry for my not very good english)