Band saw machine

A band saw machine for cutting a lumber, said band saw machine comprising:

• a frame body unit including a support frame module, said support frame module having an upright base plate that is formed with an outlet port extending therethrough in a front-rear direction;
• a transport unit including a conveyor table that is connected to said frame body unit and that extends in said front-rear direction through said outlet port, a transport pulley set that includes a plurality of transport pulley members mounted on said conveyor table and spaced apart from each other in said front-rear direction, and an endless conveyor belt that is trained on said plurality of transport pulley members and that is driven rotatably by said transport pulley members to convey the lumber;
• a hold-down unit including a track frame that is connected to said frame body unit and that extends in said front-rear direction through said outlet port, a hold-down belt roller set that includes a plurality of hold-down belt roller members mounted to said track frame and spaced apart from each other in said front-rear direction, and an endless hold-down belt that is trained on said plurality of hold-down belt roller members and that is driven rotatably by said hold-down belt roller members;
• a cutting unit connected to said support frame module and including a first cutter module, said first cutter module including a first wheel set that includes a plurality of first wheel members connected to said base plate and spaced apart from each other in a left-right direction which is perpendicular to said front-rear direction, and a first continuous band saw blade trained on said plurality of first wheel members and driven rotatably by said first wheel members, said first continuous band saw blade having a cutting section that travels alongside said outlet port, that is disposed between said transport unit and said hold-down unit, and that is adapted to cut said lumber;
• and
• a drive unit including a transport unit drive motor and a hold-down unit drive motor that are connected respectively to said transport pulley set and said hold-down belt roller set, and that are operable for respectively and synchronously driving rotations of said transport pulley members and said hold-down belt roller members to rotate said endless conveyor belt and said endless hold-down belt, said drive unit further including a first main drive motor that is connected to said first wheel set and that is operable for driving rotation of said first wheel members to rotate said first continuous band saw blade;
• wherein said support frame module of said frame body unit further has a surrounding wall projecting forward from a periphery of said base plate, and a cover plate connected to a front end of said surrounding wall and formed with an inlet port that extends therethrough and that is in alignment with said outlet port, said endless conveyor belt of said transport unit and said hold-down belt of said hold-down unit extending through said inlet port and said outlet port;
• and
• wherein said frame body unit further includes a cutting shroud module having a shroud body that extends forward and parallel to said front-rear direction from said base plate, and that defines a feed channel communicating with said outlet port and said inlet port, said transport unit and said hold-down unit extending through said feed channel, said shroud body having a first port and a second port that are formed respectively on opposite sides of said shroud body in said left-right direction, said cutting section of said first continuous band saw blade extending through said first and second ports.