Technology disclosed includes a robotic workstation for unstacking/stacking a multi-layer stack of boards and includes an end effector configured to pick up, move and release a layer of boards. The end effector includes first and second pick up and release members, each being (i) disposed below first and second support members, (ii) transversely arranged with respect to the first and second support members and (iii) attached to both of the first and second support members. The robotic workstation also includes a robotic manipulator connected to an attachment plate of the end effector and capable of moving the end effector. The robotic manipulator is under control of a controller executing stored instructions that perform operations including picking up the layer of boards by orienting the end effector such that each board of the layer of boards is transversely oriented with respect to the first and second pick up and release members.

A truss stacking system has a main conveyor for conveying trusses of a plurality of diverse designs out of a production facility and into a stack building yard or warehouse. The main conveyor is attended by a dedicated truss stacking station for each of the diverse designs, and which station includes a truss lift sub-station and a stack-forming sub-station. Each truss lift sub-station has at least a pair of traveling masts that each raises and lowers at least one bunk (eg., fork). The bunks are raised to lift a selected truss off the outflow conveyor, the masts are driven on an outbound journey to support the lifted bunk in the airspace above the stack-forming station, and then the bunks are lowered to rest the truss on the stack. Stop posts assist in stripping the truss off the bunks.

A log lifting device for raising a log into a cutting position includes a cylinder, a handle, and a wedge. The handle is coupled to and extends from the cylinder equally distant from opposing ends of the cylinder. The wedge is coupled to and extends from the cylinder proximate to the handle. The wedge is substantially perpendicular to the handle. The wedge is configured to be positioned beneath a felled log, positioning a user to grasp and pull on the handle to rotate the cylinder to apply a lifting force to the log so that the log is supported upon the handle above a surface. The log thus is positioned to be safely cut by the user using a chain saw, or other log cutting implement.

An automated lumber handling method laser-scans the top profile of multiple stacks of lumber, each of which contain boards of a unique size. Based on the scanned profiles, the method determines the order in which individual boards from a chosen stack should be transferred to a numerically controlled saw. The saw cuts the boards to size and in proper sequence to facilitate orderly assembly of a roof truss or prefabricated wall. In some examples, the method lifts individual boards by driving two retractable screws, or some other piercing tool, down into the upward facing surface of the board. A track mounted cantilever, holding the screws and a laser unit, translates over the lumber stacks to retrieve and deliver individual boards and, while doing so, the laser repeatedly scans the stacked lumber profiles on-the-fly to continuously update the profiles. The open cantilever design facilitates replenishing the stacks of lumber.

A lumber transfer system includes an overhead track and a lower conveyor for retrieving and delivering boards from multiple racks of lumber to a platform leading to a saw. In some examples of operation, a board picker travels along the track to pick up a chosen board from one of the racks. The board picker then releases the board onto the conveyor. The conveyor conveys the board underneath the other racks and delivers the board to the saw feed platform. While the conveyor is conveying the board toward the saw feed platform, the board picker returns to the racks for another board. The board picker traveling along the track and handling boards while the conveyor delivers them to the saw saves production time and increases throughput.

A sod harvester with an increased sod harvesting rate obtainable through a reduction in the time for completion of a sod handling cycle with the reduction in time obtained through changes in the interactions of transfer mechanisms within the sod harvester.

A dog link for a sharp chain conveyor with at least one spike to impale into a log, where at least one forwardly and/or upwardly facing spike on each dog link is combined with at least one rearwardly facing spike and/or barb disposed on a spike to insure that wherever the log is impaled, the dog counteracts any forward surge and more securely impales the log.

A system for treating wood (30), comprising: a treatment vessel (14) configured to receive at least one wood stack (4) for treatment, and a stack holding system (2) for holding a wood stack (4), the stack holding system (2) comprising: a frame (6), configured to support the wood stack (4); a first element (8), connected to the frame (6) near an upper side of said frame (6), configured to exert a first, downward force on the wood stack (4); and a second element (10), connected to the frame (6) near a lower side of said frame (6), configured to exert a second force on the wood stack (4) in a direction opposite said first force. The invention also comprises a method for treating wood, using a system for treating wood according to the invention.

A log lifting device for raising a log into a cutting position includes a cylinder, a handle, and a wedge. The handle is coupled to and extends from the cylinder equally distant from opposing ends of the cylinder. The wedge is coupled to and extends from the cylinder proximate to the handle. The wedge is substantially perpendicular to the handle. The wedge is configured to be positioned beneath a felled log, positioning a user to grasp and pull on the handle to rotate the cylinder to apply a lifting force to the log so that the log is supported upon the handle above a surface. The log thus is positioned to be safely cut by the user using a chain saw, or other log cutting implement.

Lumber sorting systems and methods that use adaptive lumber management to tailor the distribution of lumber to improve the yield and aesthetic properties of a product are disclosed. An adaptive lumber management system in accordance with the present disclosure may comprise a lumber scanner configured to record one or more characteristics of each board and create a data file for each board comprising information regarding the characteristic of the board. A processor may be configured to determine a target tray for each board based on the data files. The processor may be further configured to generate at least one mapping. The system may further comprise a sorting mechanism configured to sort the plurality of boards into their respective target trays and at least one tipple configured to select each board or the plurality of boards from the plurality of trays according to the at least one mapping.