\makeatletter
\def\@maketitle{%
  \noindent%
  \begin{tabular}{@{}|p{0.47\textwidth}|@{}p{0.02\textwidth}@{}|p{0.47\textwidth}|@{}}
  	\cline{1-1} \cline{3-3}
  	\fontfamily{lmss}\bfseries\selectfont\LARGE \@title\strut
  	&
  	&
  	\fontfamily{lmss}\bfseries\selectfont Nom, prénom:
  	\\
  	\large \fontfamily{lmss}\selectfont\@author{} -- \@date\strut
  	&
  	&
  	\\
  	\cline{1-1} \cline{3-3}
	\end{tabular}
}
\makeatother