Patent ID: 8729421

Claim:
A thermal cutting machine which cuts a plate placed upon a table using heat, comprising: a lattice pallet, which is installed upon said table, and which comprises a plurality of supporters in an array for placing said plate thereupon, and a support frame which supports said plurality of supporters, said support frame of said lattice pallet is installed upon said table so as to be freely removable therefrom, and said lattice pallet can be raised with a crane from said table and separated from said table with said plate still placed just as it is upon said supporters, and moreover can be installed upon said table by being lowered thereupon; an exhaust chamber which is provided in an interior of said table; an aperture for installing said lattice pallet, provided in an upper portion of said table and connected to said exhaust chamber; and guides, provided to one or both of said table and said lattice pallet, for positionally aligning said lattice pallet in said aperture, said guides include at least two guide pins fitted to peripheral walls in at least two corner portions inside said aperture of said table, said guide pins each adapted to insert into respective guide holes provided in respective plate members positioned in at least two corners of the lattice pallet where the plate members are positioned within a margin portion of the lattice pallet; said guides include inclined portions that are provided on peripheral walls of said aperture of said table, in which said inclined portions outwardly expand upward to make a size of said aperture greater than a size of the lattice pallet, wherein, when said lattice pallet is lowered down upon said table, said guide pins are inserted into said guide holes of said lattice pallet as said lattice pallet is guided into said aperture by said guides including said inclined portions, wherein the margin portion, when one standard dimension plate of a predetermined type is mounted in the middle of the lattice pallet, projects to an outside of said standard dimension plate, and a plurality of engagement lugs disposed inside said margin portion for engaging with hooks of raising wires, wherein the margin portion is defined between the outside of the standard dimension plate mounted in the middle of the lattice pallet and an inside of an external support frame of the lattice pallet.