Combustion apparatus

Abstract

A combustion apparatus includes a box and a front plate. An inward flange extending inward is provided at least on an upper part at the peripheral edge of the front plate. The upper part of the opening of the box is provided with a tongue piece protruding in the direction of the front plate. The inward flange of the front plate is provided with a notch restricting a downward movement of the front plate by bringing an upper end of the notch into contact with an upper part of the tongue piece and restricting a left-right movement of the front plate by bringing a side end of the notch into contact with at least one of left and right parts of the tongue piece in a state where the front plate is disposed at a correct position with respect to the opening of the box.

What is claimed is: 
     
         1 . A combustion apparatus comprising
 a box having an opening at least on a front surface; and   a front plate fixed to over the opening of the box, wherein   an inward flange extending inward is formed at least on an upper part of a peripheral edge of the front plate,   an upper part of the opening of the box is provided with a tongue piece protruding in a front plate direction,   the inward flange of the front plate is provided with a notch restricting a downward movement of the front plate by bringing an upper end of the notch into contact with an upper part of the tongue piece and restricting a left-right movement of the front plate by bringing a side end of the notch into contact with at least one of left and right parts of the tongue piece in a state where the front plate is disposed at a correct position with respect to the opening of the box.   
     
     
         2 . The combustion apparatus according to  claim 1 , wherein
 an upper part of the front plate is fixed by a draw latch provided on a top surface of the box, and   the lower part of the front plate is fixed by fastening a screw at a bottom surface of the box.   
     
     
         3 . The combustion apparatus according to  claim 1  or  2 , wherein
 an upper part of the opening of the box is provided with a reinforcing member having the tongue piece formed.