Abstract:
A slat positioning and placing machine is preferably configured to place slats on top of or between accumulated material layers. A set of actuating arms preferably includes complementary operating slat holding holders, such as pans or other holding devices. As a first slat holder is inserting a slat into a material package being formulated, a second slat holder is preferably positioned to receive a slat. As the second slat holder is being positioned to insert the slat into the package, the first slat holder is preferably being cycled back to receive a slat. A controls methodology preferably electronically profiles the forward and rearward movement of the actuating arms. The raising and lowering functions can also be electronically profiled. The profiles can also preferably be adjusted to increase the cycle rates for various lengths being processed, and various cycling and positioning methods are contemplated. Sticker rake-off fingers can also be provided that move from a non-obstructing position to a rake-off position to help position stickers in the material package being formed.
Abstract:
An elevated grade station drive system includes a plurality of conveyor sections for conveying workpieces downstream at a variable transfer speed along and between the plurality of sections according to control instructions provided by a control system. The output from at least one workpiece position sensor cooperates with corresponding upstream conveyor sections and provides workpiece position data to the control system. Each conveyor section has a corresponding variable frequency drive cooperating in variable speed driving engagement therewith. The control system controls each variable frequency drive so as to interlock adjacent conveyor sections for smooth translation of the workpieces between adjacent conveyor sections without crushing or binding the workpieces. The plurality of conveyor sections may include a plurality of lugged conveyors, which may be lugged chains.
Abstract:
An improved slider block is a length of flanged channel having a cut-out in the lower web of the channel to accommodate mounting a flat bar journalled in the cut-out. The flanged channel is resilient. The flanged channel has a length sufficient to cover the length of a base plate on which the flat bar is orthogonally mounted. The sides of the channel define a cavity having a depth corresponding to the thickness of the base plate. A pair of flanges extend inwardly over the cavity from the sides of the channel so as to define a chain-receiving slot therebetween. The base plate mounts within the cavity. The base plate is welded to a chain so that when the base plate is mounted in the cavity the chain is mounted in and along the chain-receiving slot.
Abstract:
A turnover apparatus and method for inverting articles such as lumber or board pieces being conveyed sideways on two or more conveyor chain loops in which each article is advanced on the conveyor chain loops by speed up belts engaging the underside of the articles to force a leading side against a pair of lugs mounted on a respective conveyor chain loop, the article thereafter flipped up to an on edge position by flipper arms also mounted on the conveyor chain loops which each engage an adjustable cam ramp at a turnover station, the article thereafter tipped over backward by being driven by the speed belts against an elevated overhung trailing edge on the lugs to complete the turnover. Optional pivoted let down elements may be arranged to engage the trailing side of the articles to controllably lower the same by motion induced by a second cam ramp at the turnover station.
Abstract:
A high-speed stacker preferably includes dual stacking arms configured to operate complementary to one another. Most preferably, an electronic control system is provided to enable precise control over the speed and positioning of the stacker arms in both horizontal and vertical orientations. Linear motion devices (such as hydraulic cylinders, screw drive linear actuators, or other devices) can be used to position the arms horizontally and vertically in response to instructions from the electronic control system. In operation, the electronic control system preferably controls the speed and ramping of the stacker arms to repeatedly move courses of material from a feed system to a stacking area at a rapid rate with little maintenance. The high-speed stacker can also be configured to operate fewer than all of the stacker arms to facilitate faster stacking of smaller courses of material.
Abstract:
An apparatus for identifying, tracking and handling lumber to be cut-in-two includes a scanner and optimizer to scan the length of a board and to compare the scanned board to predetermined criteria so as to identify a board which, optimally, would be cut into two pieces along its length. An identification device applies a detectable indicator to the board. A transfer transfers in a downstream direction, the board from the scanner to the identification device, and from the identification device to a lug-loader loading device adjacent and immediately upstream of a lug loader. A detector cooperates with the lug-loader loading device so as to detect the detectable indicator on the board and to delay the loading of the lug loader following loading of the board into a lug space so that an immediately subsequent lug space behind and upstream of the board is left empty so as to receive a portion of the board cut from the board once the board is cut-in-two in a downstream trimmer or other sawing device.
Abstract:
A log singulator and associated method for conveying and controllably discharging logs are provided. The singulator has a plurality of rotatable lifters with outwardly-extending arm members that contact the logs with a leading side to convey the logs to successive positions, for example, along a log cradle structure. The logs are conveyed to a discharge surface, which can be disposed at a declined angle so that the logs thereon tend to roll toward a discharge position. Discharge lifters, which are configured to discharge the logs from the discharge surface, have arm members that define angled cam surfaces on their trailing sides. The cam surfaces contact and retain the logs on the discharge surface until the logs reach the predetermined discharge position. Thus, the logs can be controllably discharged, for example, at a desired time.
Abstract:
A turning device comprises turning members moveable between an idle position and an operational position, a sensor located upstream of the turning member, for scanning the wood pieces on a conveyor, and an deflector controlled by the sensor and adapted, when actuated, to selectively cause the turning member to be displaced to the operational position for turning a given elongated wood piece on the conveyor to a desired position. The turning member is pivotally mounted to a motorised chain for continuously displacing the turning member adjacent the conveyor. The turning member also includes a guide pin, and the chain drives the turning member along a closed-loop guide track, the turning member having its guide pin engaged in the track.
Abstract:
A lath placer places pairs of lath segments to overlap in a package of lumber. The lath placer has at least one section which includes a pair of back-to-back lath segment placers. Each lath segment placer has a magazine and lath picker which picks lath segments from a top of the magazine. The lath segments are dropped down guide chutes onto lath gates which release the lath segments onto the package of lumber.
Abstract:
A chain conveyor having an idler shaft mounted to a carriage which is mounted to a frame for sliding motion along the direction of a chain conveyor bed. Hydraulic cylinders extend between the frame and the carriage and are constantly supplied with hydraulic oil at relatively low pressure such as can be developed with ordinary shop air pressure applied to an air-oil tank The hydraulic lines supplying fluid to the hydraulic cylinders have check valves which only allow hydraulic fluid into the cylinders, thus allowing the cylinders only to move the carriage on which the idler shaft is mounted away from the drive shaft. When the chain conveyor is momentarily reversed, the entire loaded weight of the conveyor is now applied to the idler shaft, however, the check valves prevent hydraulic fluid from leaving the hydraulic cylinders, thus preventing any motion of the carriage.