Heating cooker

Abstract

A heating cooker includes a top plate, a front frame for covering a front edge of the top plate, and opposite side frames for covering respective side edges of the top plate. A front end (edge) of each of the side frames is inserted into and covered by a side portion of the front frame. The side frame has a ridge formed on an outer surface thereof at a location a predetermined distance spaced apart from a front edge thereof such that the ridge is positioned along a rear end (edge) of the front frame.

1 . A heating appliance for cooking which comprises:
 a main body;   a generally rectangular top plate made of a heat-resisting glass and mounted on an upper surface of the main body;   a front frame disposed along a front edge of the top plate;   two side frames disposed along respective side edges of the top plate;   a heating portion mounted in the main body;   each of the side frames being formed by bending a metal plate and having an upper wall held in contact at a lower edge thereof with an upper surface of the top plate to cover a side edge of the top plate, and a side wall formed by bending the upper wall downwardly;   the front frame being formed by bending a metal plate and having an upper wall held in contact at a lower edge thereof with the upper surface of the top plate to cover a front edge of the top plate, opposite side walls each formed by bending a side portion of the front wall downwardly, and a front wall formed by bending the upper wall downwardly at a front edge thereof,   a front end of the upper wall and that of the side wall of each of the side frames being inserted into an inside of the upper wall and one of the side walls of the front frame; and   each of the side frames having an outwardly protruding strip-shaped ridge formed with the upper wall and the side wall thereof and positioned along a rear edge of the upper wall and that of each of the side walls of the front frame.   
     
     
         2 . The heating appliance for cooking according to  claim 1 , further comprising an underframe having an opening defined therein and holding a periphery of the top plate, wherein each of the side frames has a lower wall formed by bending the side wall thereof toward the underframe at a lower edge thereof and secured to a lower surface of the underframe, and the front frame has a front lower wall formed by bending the front wall toward the underframe at a lower edge thereof, and wherein the front lower wall of the front frame is secured to the lower surface of the underframe. 
     
     
         3 . The heating appliance for cooking according to  claim 2 , wherein the front frame is screwed to the underframe using a plurality of mounting holes defined in the front lower wall of the front frame. 
     
     
         4 . The heating appliance for cooking according to  claim 2 , wherein the front frame has opposite side lower walls and opposite side covers each extending inwardly from an end portion of the front lower wall or each of the side lower walls. 
     
     
         5 . The heating appliance for cooking according to  claim 2 , further comprising a rear cover held by the underframe and having a front edge to cover a rear edge of the top plate and at least one exhaust port or intake port defined therein, and a rear frame disposed along a rear edge of the rear cover, wherein the rear frame is formed by bending a metal plate and has an upper wall held in contact at a front edge thereof with an upper surface of the rear cover to cover the front edge of the rear cover, a rear wall formed by bending the upper wall downwardly at a rear edge thereof, and a lower wall formed by bending the rear wall toward the underframe at a lower edge thereof and secured to the lower surface of the underframe, and wherein the side frames, which cover side edges of the rear cover, those of the top plate, and those of the underframe, and the rear frame are formed into one-piece construction by bending a straight frame member. 
     
     
         6 . The heating appliance for cooking according to  claim 2 , further comprising a rear frame that covers a rear edge of the top plate and that of the underframe, wherein the rear frame is unitarily formed with the side frames by bending a straight frame member. 
     
     
         7 . The heating appliance for cooking according to  claim 5 , wherein the rear frame is divided into two, each of which is unitarily formed with one of the side frames. 
     
     
         8 . The heating appliance for cooking according to  claim 1 , wherein the upper wall of the front frame has a rear portion that has been bent so as to descend toward the upper surface of the top plate such that a rear edge of the upper wall of the front frame is held in contact with the upper surface of the top plate. 
     
     
         9 . A heating appliance for cooking which comprises:
 a main body;   a generally rectangular top plate mounted on an upper surface of the main body;   a front frame disposed along a front surface of the top plate and formed by bending a metal plate;   two side frames disposed along respective side surfaces of the top plate and each formed by bending a metal plate;   the front frame comprising:
 an upper wall having a rearwardly descending inclined portion and covering a front edge of the top plate; 
 a front wall formed by bending the upper wall downwardly at a front upper edge thereof; 
 a front lower wall formed by bending the front wall inwardly at a lower edge thereof; 
 two side walls formed by bending the front wall downwardly at respective side edges thereof; and 
 two side lower walls formed by bending the two side walls inwardly at respective lower edges thereof; 
   each of the side frames having an insert formed at a front end thereof and inserted into the front frame;   the insert having an engaging piece positioned below the upper wall of the front frame and above a lower end of the inclined portion so as to extend in a longitudinal direction of the upper wall of the front frame; and   the engaging piece being held in contact with the inclined portion to avoid removal of the front frame from the insert.   
     
     
         10 . The heating appliance for cooking according to  claim 9 , wherein the side frame has an upper wall that covers a side edge of an upper surface of the top plate, a side wall formed by bending the upper wall downwardly, and an outwardly protruding strip-shaped ridge formed at a location adjacent to the insert by deforming a portion of the upper wall and that of the side wall of the side frame. 
     
     
         11 . The heating appliance for cooking according to  claim 9 , wherein the side frame has an upper wall that covers a side edge of an upper surface of the top plate, a side wall formed by bending the upper wall downwardly, and a lower wall formed by bending the side wall inwardly at a lower edge thereof, and wherein the lower wall of the side frame is removed at the insert. 
     
     
         12 . The heating appliance for cooking according to  claim 11 , wherein a lower front corner of a front end of the side wall of the side frame is removed at the insert, and the side wall of the side frame has an inclined guide that inclines forwardly upwardly from a lower front edge of the side wall. 
     
     
         13 . The heating appliance for cooking according to  claim 10 , wherein the front frame has a cutout formed in each end of the inclined portion to receive a portion of the ridge of the side frame therein. 
     
     
         14 . The heating appliance for cooking according to  claim 9 , wherein the engaging piece of the side frame has a strip-shaped inclined portion that descends toward the front frame. 
     
     
         15 . The heating appliance for cooking according to  claim 9 , further comprising an underframe formed of a metal plate and disposed below the top plate for support thereof, wherein the front frame is fixed to the underframe such that the inclined portion of the front frame is held in contact at a lower edge thereof with an upper surface of the top plate, an upper surface of the front lower wall of the front frame is held in contact with a lower surface of the underframe, and the front lower wall of the front frame has a plurality of upwardly protruding protrusions formed thereon, each of which is received in a latch hole defined in the underframe. 
     
     
         16 . The heating appliance for cooking according to  claim 15 , wherein the side wall has an upper wall having an inclined portion descending toward a central portion of the top plate to cover an upper surface of a side portion of the top plate, a side wall formed by bending the upper wall downwardly, and a lower wall formed by bending the side wall inwardly at a lower edge thereof, and wherein the side frame is fixed to the underframe such that the inclined portion of the side frame is held in contact at a lower edge thereof with the upper surface of the top plate, an upper surface of the lower wall of the side frame is held in contact with a lower surface of the underframe, and the lower wall of the side frame has a plurality of upwardly protruding protrusions formed thereon, each of which is received in a latch hole defined in the underframe.