CA2398768C - Automated board processing apparatus - Google Patents
Automated board processing apparatus Download PDFInfo
- Publication number
- CA2398768C CA2398768C CA002398768A CA2398768A CA2398768C CA 2398768 C CA2398768 C CA 2398768C CA 002398768 A CA002398768 A CA 002398768A CA 2398768 A CA2398768 A CA 2398768A CA 2398768 C CA2398768 C CA 2398768C
- Authority
- CA
- Canada
- Prior art keywords
- board
- boards
- sawing
- station
- process controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
- B44B3/00—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings
- B44B3/009—Artist's machines or apparatus equipped with tools or work holders moving or able to be controlled substantially two- dimensionally for carving, engraving, or guilloching shallow ornamenting or markings using a computer control means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/008—Accessories specially designed for sawing machines or sawing devices comprising computers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Ink Jet (AREA)
- Dot-Matrix Printers And Others (AREA)
Abstract
An automatic board processing system (20) including a transverse board conveyor (28), a board extrusion portion (22), a marking station (31.1), a sawing portion (24), one or more board feeding portions (26) and a process controller (29). One or more stack of boards are supported for serially feeding each board conveyor and are conveyed in a direction transverse to the length of the boards. The boards are individually deposited into an elongate receiver (42) of a board extrusion portion to be conveyed longitudinally. A carriage (73) in the receiver transports the boards past an end detection station past a marking station and to a sawing station. The carriage has a moveable clamping member which pinches the board between a wall of the receiver and the clamping member. The carriage moves down the receiver with the board clamped thereto conveying the board in a longitudinal direction to position the board in a desired position for sawing the board. The sawing station is located at a proximal end of the receiver with proximity sensors (332), such as optical sensors comprising the end detection station also positioned at said end. A clamping station (31.3) comprising a pair of gripping rollers secure the proximal end of the board adjacent the saw station for sawing. The marking station, also positioned at said end, prints desired indicia at selected positions on the board such as by an ink jet printer (310) without physical contact of the printing mechanism with the board and while the board is moving. All operations of the board processing system are automated by the process controller.
Description
Docket No. 2485.01 WO01 AUTOMATED BOARD PROCESSING APPARATUS
BACKGROUND OF THE INVENTION
This invention relates to lumber processing equipment, more particularly the invention relates to equipment for the automated measuring and further processing of the lumber including sawing and marking.
With rising labor costs and demands for more time and cost efficient construction, it has become desirable to construct building components and modules off site at specialized fabrication facilities. in manufacturing wood frame walls, especially for prefabricated residential structures, there are great economies in providing automated equipment that can measure, cut, and mark the components utilized in wall frames. Where a particular watl design is repeated over and over, such automated equipment can decrease time of construction and lower costs.
The economics are even greater for custom wall designs. For wood structures where the frames are constructed on site, precutting and marking of boards off site can create a "kit" design minimizing necessary on site sawing and specialized labor.
Known board processing equipment that has any level of automation is mechanically complex and has limitations in capabilities. Moreover, such known equipment for marking and sawing boards requires stopping the board for each marking. Moreover, such equipment has a limited number of marking options. See, for example, U.S. Patent No. 3,685,129 to Jureit, et. al.
Moreover, known board processing equipment has not combined efficient board feeding aspects to the measuring, sawing, and printing functions.
"Board" when used herein refers to elongate pieces of lumber without restriction to size including length. For example, various lengths of lxl's, 2x2's, 2x4's, 2x10's, etc., all are included in boards. Any lumber pieces which could be used for studs, plates, headers, and trusses are included as boards. Similarly, lengths of linear veneer laminate, oriented strand board, finger joint board, are included in the definition of the boards.
SUMMARY OF THE INVENTION
An automated board processing system process expediently handles a series of boards to measure, mark and/or saw same with optimal mechanical simplicity and efficiency.
In preferred embodiments the invention includes a transverse board conveyor, a board extrusion portion, a marking station, a sawing portion, and one or more board feeding portions, all of which are controlled by a process controller. In such, preferred embodiments, one or more stacks of boards are serially fed onto the transverse board conveyor and are conveyed in a direction transverse to the length of the boards. The boards are individually deposited into an elongate receiver of a board extrusion portion to be conveyed longitudinally.
A ear-iage in the receiver transports the boards past an and detection station, past a marking station, and to a sawing station. The carriage has a gripping portion comprising a moveable-clamping member which in one embodiment pinches the distal end of the board (with respect to the saw station) between a wall of the receiver and the clamping member. The carriage moves down the receiver with the board clamped thereto conveying the board in a longitudinal direction to position the board in a desired position for sawing the board. The sawing station is located at a proximal end (with respect to the saw station) of the receiver with proximity sensors, such as optical sensors comprising the and detection station also positioned at said end. A clamping station comprising a pair of gripping rollers secure the proximal end of the board adjacent the saw station for sawing. The marking station, also positioned at said end, prints desired indicia at selected positions on the board such as by an ink jet printer without physical contact of the printing mechanism with the board and while the board is moving.
?0 Automation is provided by a process controller, such as a personal computer. The board feeding portion, the board-conveying portion, the extruding portion, the sawing portion, and the marking portion are all controlled by the process controller. The process controller handles the necessary computation for deteumining saw locations, printing locations, printing data, and operation of the various equipment portions. Data regarding sawing locations on boards, board-printing locations, printing indicia are all input into, calculated by, downloaded into and/or stored by the process controller. Such data may be input manually at the counsel.
As the board is conveyed down the receiver, under control of the process controller the optical sensors convey to tile process controller the point at which the proximal end passes the optical sensors. An encoder or other position indicating sensor connected to the carriage drive provides the location of the can-iage as the optical sensors are triggered at the end of each particular beard. The process controller can then calculate the length of the board and board locations for printing or sawing. Pairs or multiple optical sensors can similarly identify the angle of the preexisting cut on the end of the board as well as the dimensions of the board. The process controller determines and controls the timing and actuation of thc:
movement of the car-iagc, the 'ripping function, the marking station and sawing portion as the board is advanced.
SUBSTITUTE SHEET (RULE 26) A feature and advantage of particular embodiments of the invention is that the clamping, COllVeylng, 111a1'ICIIlg alld SaV4'lng 1S aCC0lnpllshed wlth a 1111;Cha111Gally SII11p1E CollflgLlratloll wlth a In1111n1a1 l7Llnlber Of Illovlllg pal'tS and a mlnlnlal I111111ber Of aCtuatorS and pOVI'el'ed COIIIpollelltS.
For example, the clamping of the carriage at the distal end of the board and the clamping of the distal end of the board to the receiver play be accomplished by a single actuator operating a pivoting clamping member.
Thus an advantage and feature of particular embodiments of the invention is that the gripping portion including the clamping mechanism for the distal end of the board to be sawed is mechanically simple while still reliably securing the board.
A further feature and advantage of particular embodiments of the invention is the clamping station has minimal moving parts with a first roller freely rotatable and fixed in position and a second roller freely rotatably and laterally moveable and biased toward the Frst IS roller to clamp the board to be sawn therebetween. One or both of said rollers can be tilted slightly in the direction of the board travel to assure the board is properly seated at the saw station.
A further feature and advantage of particular embodiments the invention is that the board ~U at the sawing station is reliably and securely held down and clamped without active or powered mechanisms.
A further feature and advantage of preferred embodiments of the invention is that the board is actively elanlped only at the moveable carriage. Moreover, the clamping mechanisms 25 do not need to extend above the board being processed, rather they only engage the sides of the board. This keeps the mechanism very simple and does not require any adaptation of the clamping mechanisms for different sizes of the boards. Moreover, in prefel-red embodiments, the delay in gripping the distal end of the board until after the proximal end has passed the end detection station assures the distal end is properly against the carriage.
Moreover, the gripped 30 distal end of the board provides optimal control over the movement of the board in both foI-ward and backward directions.
An advantage and feature of particular embodiments of the invention is that the overall system has an optimally small footprint to minimize the floor space needed for the system.
'~ S
A further advantage and feature of particular enlbodinlents of the invention is that the length of boards nlay be detel-lnined or verified before the board is cut or marked.
SUBSTITUTE SHEET (RULE 26) A Further advantage and Feature of particular embodiments of the invention is that marking of lumber far future operations is accomplished reliably and accurately without stopping, slowing, or othel-wise interFering with the travel of the board.
1VI01'eOVeI', tile gripped dlStal elld pI'OVIdeS Optllllal COIltI'OI OVP.r the IIlOVe111eI1t of th a board in bath fai-ward and a backward directions.
A further advantage and feature of particular embodiments of the invention is that board markings can be infinitely varied in size, positioning and in the pal-ticular indicia utilized.
A further advantage and feature of particular embodiments of the invention is that there is no direct contact between the marking mechanism and the board and thus no interference with the travel of the board and no wear or other stress on the marking mechanism.
1 ~ A further advantage and feature of particular embodiments of the invention is that marking and sawing of the boards is accomplished in essentially the same operation minimizing the time and equipment needed far these operations if performed on distinct pieces of equipment.
ZU BRIEF DE-SCRIPTION OF THE DRAWTNGS
FIG. 1 is a perspective view of the automated sawing and marking system components.
FIG. 2 is a partially exploded perspective view of the board extrusion portion and sawing ?5 pardon of the invention.
FIG. 3 is a plan view of the sawing portion and the adjacent and oFthe extrusion portion of the invention.
3U FIG. ~ is a perspective view ofth a end oFa receiver and carriage track of the board extrusion portion.
FIG. 5 is a plan view oFthe cal-riagc: and gripper in the receiver and track of the board extrusion portion.
FIG. 6 is a side elevational view of the carriage as shaven in FIG. 5.
F1G. 7 is a cross-scctianal viwv tal:cn at lire 7-7 of FIG. 5.
SUBSTITUTE SHEET (RULE 26) FIG. 8 is a perspective view of an upright rail of the sawing portion of the invention.
FIG. 9 is a cross-sectional view talzen at line 9-9 of FIG. 3 without the board of FIG. 3.
FIG. 10 is a cross-sectional view taken at line 10-10 of FIG. 3 without the board.
FIG. 11 shows a board with an exemplary inlc jet indicia thereon.
FIG. 12 shows an elevational view with sections broken away of the board-feeding portion of the invention.
FIG. 13 is a perspective view of an alternative multiple magazine feeder.
FIG. 1 ~ is a side elevational view of a processing system utilizing a multiple magazine feeder such as shown in FIG. 13 FIG. 15 is a side elevatiunal view of a single rack of a magazine feeder such as shown in FIGS. 13 and l~.
FIG. 16 is a side elevational view of a board processing system with an alternate multiple magazine feeder.
FIG. 17 is a block diagram showing the connections between the process controller and the major component of the system FIG. 18 is a block diagram showing an exemplary System Interconnection.
FIG. 19 is an exemplary Program Flow Chart for the system.
DE~1~AILED SPECIFICATION OF PREFERRED EMBODIMENTS\
Refen'ing to FIG. 1 a preferred embodiment of an automated processing system suitable fur measuring, sawing, and marking is illustrated and is generally designated with the numeral '_'0. The prefel-red embodiment of the invention is principally comprised of a board extrusion portion '?, a savTing portion '~, a board feeding portion '6, a transverse board convcyor'8 and a 1)I'OCCSS c011t1'011~1' ~~. The.' daShCd lIIleS UI'FIG. 1 aISU 111L1Stratr' that all adClltlullal board SUBSTITUTE SHEET (RULE 26) fi feeding means such as bunk feeders may also be utilized to feed boards onto the transverse board conveyor in conjunction with or as an alternative to the other board Feeding portion 26. Said board feeding portion ?G is shown configured as a multiple magazine board feeder.
The various portions individually and collectively have support structure 32 preferably formed of steel tubing. In the embodiment illustrated the individual portions support structures are suitably coupled together to form the overall support structure.
Refen'ing to FIGS. I and 3, positioned on the extrusion portion 2? or the sawing portion I D ?4 are marking station 31, l, a board clamping station 31.3, and a sawing station 31.4.
ReFerring to FIGS. ?, 3, 4, and 7, the board extrusion portion 22 is a longitudinal conveyor with a track 33 which includes a rail 34, spacer pieces 39, and floor pieces 40 generally configured as a square section of tubing with an open slit 36 at its top side 3~. The spacer section 39 may be flat bar stock bar as shown in FIG. 4 or angled pieces as shown in FIG. 7. The floor pieces are shown as bar shaped. The assembled pieces fornl the track with a belt recess 41 extending lengthwise therethrough.
Above the track is positioned a receiver 42 defined by a first upright vertical wall 44 at a first side 46 and an opposing retention member 48 at the second side 50 and the bottom wall 41.
A ramped guide portion 51 is at a proximal end 52 (with respect to the sawing station) of the board extruding portion to position and guide the proximal end 53 of the board B being processed with respect to, the clamping station 31.3, the marking station 31.1 and the sawing station 31.4. A drive assembly 54 includes an electric motor SG, suitable right reduction angle gearing 58 connecting to a drive pulley 60, a driven pulley 62 which is attached to the main belt drive pulley, not shown, connected to the drive pulley 62. A main belt 66 extends from the main belt drive pulley to the idler pulley 70 at the opposite end of the track 34.
The idler pulley 70 is attached to an encoder 7? for providing positian data relative to the belt 66 and an attached carriage 73 which is discussed in more detail below.
Referring specifically to FIGS. 1, 2, 4, and 7, the board-extruding portion is attached to the transverse board conveyor ?~ by suitable connecting members 74 as part of the support structure 3?. Transfer of the boards from the transverse: board conveyor to the receiver 42 of the extrusion portion is accomplished by a suitable transfer means 7G
v°hieh is shown configured as 3~ a shaft 8D extending substantially the length ofthc receiv°er w°ith square tubing 8? extending alung said shaft and fixed thereto and with a plurality of l7ip arms SCi attached to the square tubing. The shaft suitably rides upon ultra high molecular weight pulycthylene bearings 90 SLlltably attached to the SLlpport StI'LICtLIre 3~. A pllc.'LlIIILItIC
Cy1111dC1' ~4 aIlChOred tU the SLlppOrt SUBSTITUTE SHEET (RULE 26) structure 32 is attached to a bell crank 96 fixed to the shaft 80.
Actuation"b'ftli~e"~inet~l. ~t~'~' cylinder which is attached to the distal end 98 of bell crank 96 rotates the bell crank and the shaft 80 with the square tubing approximately 90°. With said rotation the flip arms 86 rotate from the horizontal position as shown in FIGS. 1 and ? to an upright position transferring any boards in the transfer position 120 thereon from the transverse board conveyor 28 into th a receiver ~2 of the board extrusion portion 22. The flip arms may also include additional curved stop members 102 which function to prevent any boards from being conveyed into the unload position on the transverse conveyor before the I7ip arms return to their horizontal position.
Referring to FIGS. l, 2, and 7, the transverse board conveyor 28, also termed a "live deck" comprises a generally horizontal conveyance means 10~ configured as a plurality of linlced roller chain link loops 110 suitably driven by a plurality of sprockets (not shown) positioned in the chain housings 112 and a drive motor 1 13. Upright stops 116 attached to the support structure 32 and positioned on the ends of the chain housings defining a transfer position 120 as I S indicated by the dashed lines of FIG. 7. An proximity sensor 1?~. such as optical, capacitive, mechanical sensor or other sensing means is placed adjacent to the transfer position to detect the presence of a board in the transfer position. Such sensing means may be located at several positions on the support structure adjacent the transfer position to provide information to the process controller as to the length of the board in said position in addition to the presence of such board.
Prior to transfer of the board from the board transfer position, to the distal end 125 of the receiver and distal end 126 of the board extruding portion, the carriage 73 is conveyed longitudinally down the receiver to be out of the way of the board prior to transfer. Referring to FIGS. 5, 6, and 7, details of the carriage are illustrated. T he carriage principally comprises a guide portion 130 to secure the carriage in the track and a gripping or clamping portion 132 to clamp a board being processed. The carriage Functions to transfer the board being processed longitudinally along the receiver to move the board past the printing station and to appropriately position particular selected points on the board at the sawing station. The guide portion 130 is 3U suitably formed Ii-om appropriately stacked metal components and ultra high-density polyethylene. The polyethylene is suitably used fur low friction bearing members. The configuration as illustrated includes a lower polyethylene bearing member 13S, an adjacent guide member 140 formed of aluminum with a plurality of polyethylene inserts 1~? for contact with the rail 33, a pair of opposing spacers I50, 152, which clamp onto the belt (i6, another aluminum spacer member 158 with additional polyethylene bearing inserts 162 extends up to the carriage base 16~ onto the base is mounted a pneumatic cylinder 170 connecting to a clamping member 172 CUnfIgLlred aS ~l Illlgl:r V'Ith all ellgagelllellt pOrtIUll 17~.
ACtLlat1011 UfthC pIleul17at1C Cy11I1de1' 170 rotates the clamping finger li-om the open position 176 as shownl by the dashed lines of FIG.
SUBSTITUTE SHEET (RULE 26) to the engagement position as shown by the solid lines. Significantly, when in the open position, the clamping finger is under the retention member 48.
The pneumatic cylinder 17D is connected by hoses 17G to connectors 18D on a mounting 5 plate 184. The connectors are suitably connected to a pneumatic source 19D
remotely located from the can -iage such as in the sawing portion 24 as shown in FIG. 1 or with the control processor or separated totally from the equipment, The pneumatic hoses may be suitably suspended from above the extrusion portion to provide for the travel of the carriage or may alternatively be coiled upon a guide shaft 194 as shown in FIG. 1 to facilitate the travel of said 1 D carriage in the receiver.
Referring to FIGS. 1, 2, and 8, details of the sawing portion of the invention are shown.
The sav,~ station includes a structural frame work 21 D generally comprised of steel tubing, a pair of upright guide rails 212, 214, and a pair of glide blocks. Attached to the support plate 218 is a saw motor 22D with the attached saw blade 222. The mounting plate 218 and attached saw motor and saw blade are movable vertically by attachment to the glide blocks 21G slidably engaged in the rails 212, 214. Fluid powered, pneumatic, or hydraulic cylinders 215, 21G or other actuators controlled by the control processor operate to raise and lower the saw. Suitable shielding ''3D is provided to the saw station for protection of operators and other personnel.
2D Appropriate limit switches and sensors 23G are suitably attached to the sawing station for providing data to the process controller relative to the monitoring and control of said sawing station. Although the saw station is shown configured as a chop saw for providing 9D° cuts relative to the lengths of the boards, the saw could be adjustable, as is known in the art, with respect to the angles of cuts. Such adjustability could be controlled by the process controller and such would be particularly useful for cutting roof trusses components, for example.
Referring to FIGS. 3, 9, and 1 D, various aspects of the extruding portion and sawing portion that cooperate are illustrated. Mounted to the support structure of the invention, such as the sawing portion framework 21 D, and forming the clamping station, are a pair of gripping roller 3D clamps 25D, 252. Said roller clamps have a textured surface 25G which may be a knurled or other machined surface which provides a high friction engagement with boards.
Une roller assembly 2GD is suitably fixed to put the surface 25G of said roller in substantially coplanar alignment with the vertical wall 44 of the extrusion poc-tion. The other roller assembly 264 is moveable inwardly to an interference positioned 27D as indicated by the dashed lines. Said roller is biased by a spring 272 or other suitable means imvardly. Thus, when a board is conveyed into engagement w°ith the roller clamps the high friction engagement between the board and rollers allow only a longitudinal movement of the board with respect to the receiver.
The axis A of on c or both rollers may be slightly inclined toward the sawing station such as to urge the board SUBSTITUTE SHEET (RULE 26) 9 Docket No. 2485.01 WO03 engaged with said rollers downwardly to maintain board contact with the floor of the sawing station. Slightly less effectiveness can be had using the inwardly biased roller assembly against the vertical wall. The use of such rollers in conjunction with the clamping member 172 provide a minimal number of clamping components and a minimal number of powered clamping components while still efficiently and securely providing a longitudinal controlled and vertically restricted movement of the board past the printing station and to the sawing station. The dashed lines in FIG. 3 enumerated 273 represents the path of travel of the boards.
One of the rollers can be connected to an encoder or the like to provide an alternative or additional registration means for the positioning of the board being conveyed.
Moreover, such rollers can be powered to provide alternate conveyance means for the boards other than the carriage. This could be particularly applicable where extremely long boards utilized in association with particular aspects of the invention, i.e., the marking station without the carnage.
Also located adjacent to the sawing station is the marking station 31.1. The marking station projects an indicia forming media onto the surface of the board. An indicia generator is conf gored as an ink jet printer 310 suitably attached to the support structure. In the configuration as shown the ink jets 312 are positioned at a window 314 in the vertical wall 44. A
suitable ink jet printer is found to be the Mathews JET A MARI~Iarks 2002 printer which has multiple linearly aligned ink jets.
The aligned ink jets are positioned transverse to the length of the board. The individual jets intermittently discharge ink as the board is passing by to create a two-dimensional image on the board. This provides a high level of flexibility with respect to the length of the image on the board while utilizing minimal space and components for the print apparatus.
Moreover, the printing is controlled by the control processor to be coordinated with the movement of the boards and thus does not control or restrict the flow of lumber through the system as is tlae case with conventional systems.
The print head may be controlled by a print controller card which is part of the process controller. The print controller is suitably located in the sawing portion or other suitable location. The ink jet printer does not need to be positioned in a window in the vertical wall, and as such, can be on the opposite side of the board. Sinularly, more than one ink jet print head can be utilized on one side of the receiver for more definition in the indicia, several ink jet print heads can be used on opposite sides of the receiver or above the receiver.
FIG. 11 represents a sample indicia which can provide the location position for a stud indicated by the S. In addition to stud locations, other indicia such as part number or description of the particular piece of lumber to be cut can also be provided by the marking station. The ink jet printers can provide z,e pg/07/2005 ~18 53 X306 359 6956 i0receiveC
indicia that provides a cut line for an angled cut if the saw portion is not conFigured to provide such. An alternate indicia generator could be a laser to score the board surface. Either such print head may be mounted to pivot as the board travels by to momentarily follow the board such that the indicia forming media can be adequately disposed on the board surface.
Also illustrated in FIGS. 3 and 10, is a first board end sensing station 31.2 comprised of at least one presence sensing sensor 332 and ideally a plurality of such sensors. In a preferred embodiment, such presence sensing sensors will be optical sensors ideally utilizing a light beams) from the light beam generators) 33~ positioned opposite the receiver from the sensors 10 thus producing a horizontal sensing region. Alternatively, the optical sensors can be of the type with the light generating means adjacent to the light sensor. Other presence sensing sensors could include inductive sensors, capacitive sensors, and mechanical sensors such as micro switches. Such sensors are connected to the control processor and are utilized to detect when the first end or proximal end of the board passes by the sensors. Utilization of the vertically aligned plurality of sensors allows for sequential activation of the sensors For detecting angled cuts on the proximal board end based upon the timing of the sequential activations and the distanced traveled by the carriage and the board as provided by the encoder. Moreover, the actual height of the board can be determined to an accuracy dependent upon the vertical spacing of the sensors. Similarly, sensors facing upward or downward and having a vertical sensing region and spaced transverse to the path-of travel can be utilized to detect angled cuts as seen from the plan view.
In an embodiment incorporating certain aspects of the invention without the carriage engaging the distal ends of the boards, additional presence sensing sensors, i.e. optos can be utilized along the receiver to form a second board end sensing station. 'Thus, the control processor can determine the length of a board being conveyed down the receiver by registering the activations of the first and second board end sensors as well as calculating the travel of the board.
Referring to FIGS. 1 and 12, a board-feeding portion 26 of the invention configured as a magazine feeder is illustrated. Details of the mechanism are illustrated in FIG. 12. 'This board-feeding portion has a plurality of magazines 3G2, 363, 3G~ which may be manually or automatically loaded. Such magazines may be utilized for different sizes, grades, lengths or kinds of lumber. As illustrated one magazine may be utilized for 2~G's and another magazine may be utilized for''x~'s or unc magazine may hold 8-foot board lengths while another magazine holds 12-Foot lengths. 'fhe stacks of wood are constrained by pairs of guide portions 3fi5 defining slots 3G6. 'the board feeding portion deposits in a serial manner on the live deck boards from selected magazines. The boards in each magazine arty retained therein by a powered dual SUBSTITUTE SHEET (RULE 26) retention mechanism 37(.l. Said mechanism utilizes a lever arm 372 with first and second engagement portions 37~, 37~ on opposite sides of a pivot point 380. The lover ann is shi fted between a first position as shown in the second magazine 363 by the actuation and extension of the powered member 38? which is part of a pneumatic cylinder 38~ to a second position as illustrated in the third magazine 364. In the Frst position the first engagement portion is in an obstructing position with the lower most board 386 and the second engagement portion is in a release or non-clamping position. In the second position the first engagement portion is pivoted out of the obstructing position to release the low ernlost board and the second engagement portion is pivoted into a clamping position with the adjacent board 3$7 next in position in the 1 U magazine. After the board in the first magazine position is deposited onto the transverse board conveyor ?8 the pneumatic actuation is reversed and the clamping portian is removed from the next board, the first engagement partion is moved to the interference position and the adjacent board and stack falls to engage and stop at the first engagement portion thereby stopping the further discharge of boards from that particular magazine. Actuation of each pneumatic cylinder for each magazine is controlled by the process controller. The dashed lines illustrate the path of travel.
Referring to FIGS. 13, 1~, 15 and 16 alternative embodiments for the multiple board magazines SUO which feed onto the live deck 28 for conveyance into the board extrusion portion ~0 2?. As illustrated in FIGS. 13 and 16 the different magazines will suitably be utilized for different sizes of lumber, for example different lengths of lumber as illustrated. Thus the control processor can control the sequence of boards released for a specific job.
Moreover, these particular magazines can be utilized for recycling odd size lumber or previously cut or scrap lumbar as illustrated in FIG. 16 in the first and second magazines 510, 511.
Indicators such as ?5 light bulbs 516 can be provided to indicate when a particular magaaine is below a particular level.
The magazines as illustrated in FIGS. 13, 1 d. and 15 each have a plurality of board racks 519 which utilize a plurality of individual vertical carriages 5?U which slide upon a rail 522 and 30 which are upwardly biased by springs 5?4. An actuator 5?8 operates to lower the vertical magazine 5?0 down where the lowermost board 53? is engaged by the horizontal conveyor'8.
Note in FIG. 1~ a portion of the conveyor is brolcen away for clarity of illustratian. A retention member 536 can be adjustable to allow the various magazines to accommodate different sizes of boards and, in particular, different ihicknesses. As shown in FIG. 15 the retention member 536 35 will assure that the board adjacent to the lower most board 53~ is not pulled out of the magazine when the lower most board is nwved oLlt laterally. The actuator 5'_8 operates to lower the carriage and is contrulled by the contrul processor.
SUBSTITUTE SHEET (RULE 26) 1' FIG. 16 illustrates an alternative embodiment in which the magazines each comprise racks 519 with vertical supports 5~.0 to form a magazine with a forward exit slot 5~0 to and have an injection plunger S~G to discharge flue lover most board out of the stack of boards in the magazine. Typically there would be a plunger For each separate rack relative to each magazine.
The magazines designated for recycling are used in conjunction with the capabilities of prefewed embodiments of the system which measure the length of the board. The control processor can be suitably configured to optimize and select particular sized boards to be cut from each measured board. Moreover, the angles of cuts on the ends of the lumber being recycled can be determined as described above.
In addition to the magazine board feeders an additional bunk feeder or other board feeding arrangement such as manually laying the boards on the transverse board conveyor may, of course, be utilized.
Referring to FIG. 17 a block diagram showing the intercomlection of the process controller to the various portions and components of the equipment embodying the invention.
The process controller can be a single computer or several interconnected computers and as such can include a local area netv~~ork, When used herein, "process controller"
includes all of the 2p above and also can include individual control cards for the specific portions of the equipment, i.e. the print head. Each of the separate portions will typically have sensors such as a proximity sensors, and actuators. When used herein, actuator includes fluid operated cylinders, either hydraulic or pneumatic, electric nrotors, including linear motors, solenoids and any other powered mechanism. Moreover, any of these sensors illustrated as being positioned on one of the portions could often be arranged on a different portion or component of the apparatus with similar performance and without being beyond the boundaries of the invention claimed herein.
For example, the clamping rollers could be placed either on the board-extruding portion as portrayed or on the sawing portion.
~U Referring to FIG. 18, a more detailed Systems Interconnectiun Block diagram is shown that is suitable for equipment embodying the invention. The data transfer process, programming of the process controller, and control of the various actuators is by conventional means familiar to those knowledgeable in such art.
Referring to FIG. 19, a suitable flues chart for the process controller is illustrated.
The present invenliot~ may be embudied iv other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be SUBSTITUTE SHEET (RULE 26) I .~
considered in all respects as illustrative and not restrictive, reference being made to the appended claims rather than to the foregoing description to indicate the scope of the invention.
SUBSTITUTE SHEET (RULE 26)
BACKGROUND OF THE INVENTION
This invention relates to lumber processing equipment, more particularly the invention relates to equipment for the automated measuring and further processing of the lumber including sawing and marking.
With rising labor costs and demands for more time and cost efficient construction, it has become desirable to construct building components and modules off site at specialized fabrication facilities. in manufacturing wood frame walls, especially for prefabricated residential structures, there are great economies in providing automated equipment that can measure, cut, and mark the components utilized in wall frames. Where a particular watl design is repeated over and over, such automated equipment can decrease time of construction and lower costs.
The economics are even greater for custom wall designs. For wood structures where the frames are constructed on site, precutting and marking of boards off site can create a "kit" design minimizing necessary on site sawing and specialized labor.
Known board processing equipment that has any level of automation is mechanically complex and has limitations in capabilities. Moreover, such known equipment for marking and sawing boards requires stopping the board for each marking. Moreover, such equipment has a limited number of marking options. See, for example, U.S. Patent No. 3,685,129 to Jureit, et. al.
Moreover, known board processing equipment has not combined efficient board feeding aspects to the measuring, sawing, and printing functions.
"Board" when used herein refers to elongate pieces of lumber without restriction to size including length. For example, various lengths of lxl's, 2x2's, 2x4's, 2x10's, etc., all are included in boards. Any lumber pieces which could be used for studs, plates, headers, and trusses are included as boards. Similarly, lengths of linear veneer laminate, oriented strand board, finger joint board, are included in the definition of the boards.
SUMMARY OF THE INVENTION
An automated board processing system process expediently handles a series of boards to measure, mark and/or saw same with optimal mechanical simplicity and efficiency.
In preferred embodiments the invention includes a transverse board conveyor, a board extrusion portion, a marking station, a sawing portion, and one or more board feeding portions, all of which are controlled by a process controller. In such, preferred embodiments, one or more stacks of boards are serially fed onto the transverse board conveyor and are conveyed in a direction transverse to the length of the boards. The boards are individually deposited into an elongate receiver of a board extrusion portion to be conveyed longitudinally.
A ear-iage in the receiver transports the boards past an and detection station, past a marking station, and to a sawing station. The carriage has a gripping portion comprising a moveable-clamping member which in one embodiment pinches the distal end of the board (with respect to the saw station) between a wall of the receiver and the clamping member. The carriage moves down the receiver with the board clamped thereto conveying the board in a longitudinal direction to position the board in a desired position for sawing the board. The sawing station is located at a proximal end (with respect to the saw station) of the receiver with proximity sensors, such as optical sensors comprising the and detection station also positioned at said end. A clamping station comprising a pair of gripping rollers secure the proximal end of the board adjacent the saw station for sawing. The marking station, also positioned at said end, prints desired indicia at selected positions on the board such as by an ink jet printer without physical contact of the printing mechanism with the board and while the board is moving.
?0 Automation is provided by a process controller, such as a personal computer. The board feeding portion, the board-conveying portion, the extruding portion, the sawing portion, and the marking portion are all controlled by the process controller. The process controller handles the necessary computation for deteumining saw locations, printing locations, printing data, and operation of the various equipment portions. Data regarding sawing locations on boards, board-printing locations, printing indicia are all input into, calculated by, downloaded into and/or stored by the process controller. Such data may be input manually at the counsel.
As the board is conveyed down the receiver, under control of the process controller the optical sensors convey to tile process controller the point at which the proximal end passes the optical sensors. An encoder or other position indicating sensor connected to the carriage drive provides the location of the can-iage as the optical sensors are triggered at the end of each particular beard. The process controller can then calculate the length of the board and board locations for printing or sawing. Pairs or multiple optical sensors can similarly identify the angle of the preexisting cut on the end of the board as well as the dimensions of the board. The process controller determines and controls the timing and actuation of thc:
movement of the car-iagc, the 'ripping function, the marking station and sawing portion as the board is advanced.
SUBSTITUTE SHEET (RULE 26) A feature and advantage of particular embodiments of the invention is that the clamping, COllVeylng, 111a1'ICIIlg alld SaV4'lng 1S aCC0lnpllshed wlth a 1111;Cha111Gally SII11p1E CollflgLlratloll wlth a In1111n1a1 l7Llnlber Of Illovlllg pal'tS and a mlnlnlal I111111ber Of aCtuatorS and pOVI'el'ed COIIIpollelltS.
For example, the clamping of the carriage at the distal end of the board and the clamping of the distal end of the board to the receiver play be accomplished by a single actuator operating a pivoting clamping member.
Thus an advantage and feature of particular embodiments of the invention is that the gripping portion including the clamping mechanism for the distal end of the board to be sawed is mechanically simple while still reliably securing the board.
A further feature and advantage of particular embodiments of the invention is the clamping station has minimal moving parts with a first roller freely rotatable and fixed in position and a second roller freely rotatably and laterally moveable and biased toward the Frst IS roller to clamp the board to be sawn therebetween. One or both of said rollers can be tilted slightly in the direction of the board travel to assure the board is properly seated at the saw station.
A further feature and advantage of particular embodiments the invention is that the board ~U at the sawing station is reliably and securely held down and clamped without active or powered mechanisms.
A further feature and advantage of preferred embodiments of the invention is that the board is actively elanlped only at the moveable carriage. Moreover, the clamping mechanisms 25 do not need to extend above the board being processed, rather they only engage the sides of the board. This keeps the mechanism very simple and does not require any adaptation of the clamping mechanisms for different sizes of the boards. Moreover, in prefel-red embodiments, the delay in gripping the distal end of the board until after the proximal end has passed the end detection station assures the distal end is properly against the carriage.
Moreover, the gripped 30 distal end of the board provides optimal control over the movement of the board in both foI-ward and backward directions.
An advantage and feature of particular embodiments of the invention is that the overall system has an optimally small footprint to minimize the floor space needed for the system.
'~ S
A further advantage and feature of particular enlbodinlents of the invention is that the length of boards nlay be detel-lnined or verified before the board is cut or marked.
SUBSTITUTE SHEET (RULE 26) A Further advantage and Feature of particular embodiments of the invention is that marking of lumber far future operations is accomplished reliably and accurately without stopping, slowing, or othel-wise interFering with the travel of the board.
1VI01'eOVeI', tile gripped dlStal elld pI'OVIdeS Optllllal COIltI'OI OVP.r the IIlOVe111eI1t of th a board in bath fai-ward and a backward directions.
A further advantage and feature of particular embodiments of the invention is that board markings can be infinitely varied in size, positioning and in the pal-ticular indicia utilized.
A further advantage and feature of particular embodiments of the invention is that there is no direct contact between the marking mechanism and the board and thus no interference with the travel of the board and no wear or other stress on the marking mechanism.
1 ~ A further advantage and feature of particular embodiments of the invention is that marking and sawing of the boards is accomplished in essentially the same operation minimizing the time and equipment needed far these operations if performed on distinct pieces of equipment.
ZU BRIEF DE-SCRIPTION OF THE DRAWTNGS
FIG. 1 is a perspective view of the automated sawing and marking system components.
FIG. 2 is a partially exploded perspective view of the board extrusion portion and sawing ?5 pardon of the invention.
FIG. 3 is a plan view of the sawing portion and the adjacent and oFthe extrusion portion of the invention.
3U FIG. ~ is a perspective view ofth a end oFa receiver and carriage track of the board extrusion portion.
FIG. 5 is a plan view oFthe cal-riagc: and gripper in the receiver and track of the board extrusion portion.
FIG. 6 is a side elevational view of the carriage as shaven in FIG. 5.
F1G. 7 is a cross-scctianal viwv tal:cn at lire 7-7 of FIG. 5.
SUBSTITUTE SHEET (RULE 26) FIG. 8 is a perspective view of an upright rail of the sawing portion of the invention.
FIG. 9 is a cross-sectional view talzen at line 9-9 of FIG. 3 without the board of FIG. 3.
FIG. 10 is a cross-sectional view taken at line 10-10 of FIG. 3 without the board.
FIG. 11 shows a board with an exemplary inlc jet indicia thereon.
FIG. 12 shows an elevational view with sections broken away of the board-feeding portion of the invention.
FIG. 13 is a perspective view of an alternative multiple magazine feeder.
FIG. 1 ~ is a side elevational view of a processing system utilizing a multiple magazine feeder such as shown in FIG. 13 FIG. 15 is a side elevatiunal view of a single rack of a magazine feeder such as shown in FIGS. 13 and l~.
FIG. 16 is a side elevational view of a board processing system with an alternate multiple magazine feeder.
FIG. 17 is a block diagram showing the connections between the process controller and the major component of the system FIG. 18 is a block diagram showing an exemplary System Interconnection.
FIG. 19 is an exemplary Program Flow Chart for the system.
DE~1~AILED SPECIFICATION OF PREFERRED EMBODIMENTS\
Refen'ing to FIG. 1 a preferred embodiment of an automated processing system suitable fur measuring, sawing, and marking is illustrated and is generally designated with the numeral '_'0. The prefel-red embodiment of the invention is principally comprised of a board extrusion portion '?, a savTing portion '~, a board feeding portion '6, a transverse board convcyor'8 and a 1)I'OCCSS c011t1'011~1' ~~. The.' daShCd lIIleS UI'FIG. 1 aISU 111L1Stratr' that all adClltlullal board SUBSTITUTE SHEET (RULE 26) fi feeding means such as bunk feeders may also be utilized to feed boards onto the transverse board conveyor in conjunction with or as an alternative to the other board Feeding portion 26. Said board feeding portion ?G is shown configured as a multiple magazine board feeder.
The various portions individually and collectively have support structure 32 preferably formed of steel tubing. In the embodiment illustrated the individual portions support structures are suitably coupled together to form the overall support structure.
Refen'ing to FIGS. I and 3, positioned on the extrusion portion 2? or the sawing portion I D ?4 are marking station 31, l, a board clamping station 31.3, and a sawing station 31.4.
ReFerring to FIGS. ?, 3, 4, and 7, the board extrusion portion 22 is a longitudinal conveyor with a track 33 which includes a rail 34, spacer pieces 39, and floor pieces 40 generally configured as a square section of tubing with an open slit 36 at its top side 3~. The spacer section 39 may be flat bar stock bar as shown in FIG. 4 or angled pieces as shown in FIG. 7. The floor pieces are shown as bar shaped. The assembled pieces fornl the track with a belt recess 41 extending lengthwise therethrough.
Above the track is positioned a receiver 42 defined by a first upright vertical wall 44 at a first side 46 and an opposing retention member 48 at the second side 50 and the bottom wall 41.
A ramped guide portion 51 is at a proximal end 52 (with respect to the sawing station) of the board extruding portion to position and guide the proximal end 53 of the board B being processed with respect to, the clamping station 31.3, the marking station 31.1 and the sawing station 31.4. A drive assembly 54 includes an electric motor SG, suitable right reduction angle gearing 58 connecting to a drive pulley 60, a driven pulley 62 which is attached to the main belt drive pulley, not shown, connected to the drive pulley 62. A main belt 66 extends from the main belt drive pulley to the idler pulley 70 at the opposite end of the track 34.
The idler pulley 70 is attached to an encoder 7? for providing positian data relative to the belt 66 and an attached carriage 73 which is discussed in more detail below.
Referring specifically to FIGS. 1, 2, 4, and 7, the board-extruding portion is attached to the transverse board conveyor ?~ by suitable connecting members 74 as part of the support structure 3?. Transfer of the boards from the transverse: board conveyor to the receiver 42 of the extrusion portion is accomplished by a suitable transfer means 7G
v°hieh is shown configured as 3~ a shaft 8D extending substantially the length ofthc receiv°er w°ith square tubing 8? extending alung said shaft and fixed thereto and with a plurality of l7ip arms SCi attached to the square tubing. The shaft suitably rides upon ultra high molecular weight pulycthylene bearings 90 SLlltably attached to the SLlpport StI'LICtLIre 3~. A pllc.'LlIIILItIC
Cy1111dC1' ~4 aIlChOred tU the SLlppOrt SUBSTITUTE SHEET (RULE 26) structure 32 is attached to a bell crank 96 fixed to the shaft 80.
Actuation"b'ftli~e"~inet~l. ~t~'~' cylinder which is attached to the distal end 98 of bell crank 96 rotates the bell crank and the shaft 80 with the square tubing approximately 90°. With said rotation the flip arms 86 rotate from the horizontal position as shown in FIGS. 1 and ? to an upright position transferring any boards in the transfer position 120 thereon from the transverse board conveyor 28 into th a receiver ~2 of the board extrusion portion 22. The flip arms may also include additional curved stop members 102 which function to prevent any boards from being conveyed into the unload position on the transverse conveyor before the I7ip arms return to their horizontal position.
Referring to FIGS. l, 2, and 7, the transverse board conveyor 28, also termed a "live deck" comprises a generally horizontal conveyance means 10~ configured as a plurality of linlced roller chain link loops 110 suitably driven by a plurality of sprockets (not shown) positioned in the chain housings 112 and a drive motor 1 13. Upright stops 116 attached to the support structure 32 and positioned on the ends of the chain housings defining a transfer position 120 as I S indicated by the dashed lines of FIG. 7. An proximity sensor 1?~. such as optical, capacitive, mechanical sensor or other sensing means is placed adjacent to the transfer position to detect the presence of a board in the transfer position. Such sensing means may be located at several positions on the support structure adjacent the transfer position to provide information to the process controller as to the length of the board in said position in addition to the presence of such board.
Prior to transfer of the board from the board transfer position, to the distal end 125 of the receiver and distal end 126 of the board extruding portion, the carriage 73 is conveyed longitudinally down the receiver to be out of the way of the board prior to transfer. Referring to FIGS. 5, 6, and 7, details of the carriage are illustrated. T he carriage principally comprises a guide portion 130 to secure the carriage in the track and a gripping or clamping portion 132 to clamp a board being processed. The carriage Functions to transfer the board being processed longitudinally along the receiver to move the board past the printing station and to appropriately position particular selected points on the board at the sawing station. The guide portion 130 is 3U suitably formed Ii-om appropriately stacked metal components and ultra high-density polyethylene. The polyethylene is suitably used fur low friction bearing members. The configuration as illustrated includes a lower polyethylene bearing member 13S, an adjacent guide member 140 formed of aluminum with a plurality of polyethylene inserts 1~? for contact with the rail 33, a pair of opposing spacers I50, 152, which clamp onto the belt (i6, another aluminum spacer member 158 with additional polyethylene bearing inserts 162 extends up to the carriage base 16~ onto the base is mounted a pneumatic cylinder 170 connecting to a clamping member 172 CUnfIgLlred aS ~l Illlgl:r V'Ith all ellgagelllellt pOrtIUll 17~.
ACtLlat1011 UfthC pIleul17at1C Cy11I1de1' 170 rotates the clamping finger li-om the open position 176 as shownl by the dashed lines of FIG.
SUBSTITUTE SHEET (RULE 26) to the engagement position as shown by the solid lines. Significantly, when in the open position, the clamping finger is under the retention member 48.
The pneumatic cylinder 17D is connected by hoses 17G to connectors 18D on a mounting 5 plate 184. The connectors are suitably connected to a pneumatic source 19D
remotely located from the can -iage such as in the sawing portion 24 as shown in FIG. 1 or with the control processor or separated totally from the equipment, The pneumatic hoses may be suitably suspended from above the extrusion portion to provide for the travel of the carriage or may alternatively be coiled upon a guide shaft 194 as shown in FIG. 1 to facilitate the travel of said 1 D carriage in the receiver.
Referring to FIGS. 1, 2, and 8, details of the sawing portion of the invention are shown.
The sav,~ station includes a structural frame work 21 D generally comprised of steel tubing, a pair of upright guide rails 212, 214, and a pair of glide blocks. Attached to the support plate 218 is a saw motor 22D with the attached saw blade 222. The mounting plate 218 and attached saw motor and saw blade are movable vertically by attachment to the glide blocks 21G slidably engaged in the rails 212, 214. Fluid powered, pneumatic, or hydraulic cylinders 215, 21G or other actuators controlled by the control processor operate to raise and lower the saw. Suitable shielding ''3D is provided to the saw station for protection of operators and other personnel.
2D Appropriate limit switches and sensors 23G are suitably attached to the sawing station for providing data to the process controller relative to the monitoring and control of said sawing station. Although the saw station is shown configured as a chop saw for providing 9D° cuts relative to the lengths of the boards, the saw could be adjustable, as is known in the art, with respect to the angles of cuts. Such adjustability could be controlled by the process controller and such would be particularly useful for cutting roof trusses components, for example.
Referring to FIGS. 3, 9, and 1 D, various aspects of the extruding portion and sawing portion that cooperate are illustrated. Mounted to the support structure of the invention, such as the sawing portion framework 21 D, and forming the clamping station, are a pair of gripping roller 3D clamps 25D, 252. Said roller clamps have a textured surface 25G which may be a knurled or other machined surface which provides a high friction engagement with boards.
Une roller assembly 2GD is suitably fixed to put the surface 25G of said roller in substantially coplanar alignment with the vertical wall 44 of the extrusion poc-tion. The other roller assembly 264 is moveable inwardly to an interference positioned 27D as indicated by the dashed lines. Said roller is biased by a spring 272 or other suitable means imvardly. Thus, when a board is conveyed into engagement w°ith the roller clamps the high friction engagement between the board and rollers allow only a longitudinal movement of the board with respect to the receiver.
The axis A of on c or both rollers may be slightly inclined toward the sawing station such as to urge the board SUBSTITUTE SHEET (RULE 26) 9 Docket No. 2485.01 WO03 engaged with said rollers downwardly to maintain board contact with the floor of the sawing station. Slightly less effectiveness can be had using the inwardly biased roller assembly against the vertical wall. The use of such rollers in conjunction with the clamping member 172 provide a minimal number of clamping components and a minimal number of powered clamping components while still efficiently and securely providing a longitudinal controlled and vertically restricted movement of the board past the printing station and to the sawing station. The dashed lines in FIG. 3 enumerated 273 represents the path of travel of the boards.
One of the rollers can be connected to an encoder or the like to provide an alternative or additional registration means for the positioning of the board being conveyed.
Moreover, such rollers can be powered to provide alternate conveyance means for the boards other than the carriage. This could be particularly applicable where extremely long boards utilized in association with particular aspects of the invention, i.e., the marking station without the carnage.
Also located adjacent to the sawing station is the marking station 31.1. The marking station projects an indicia forming media onto the surface of the board. An indicia generator is conf gored as an ink jet printer 310 suitably attached to the support structure. In the configuration as shown the ink jets 312 are positioned at a window 314 in the vertical wall 44. A
suitable ink jet printer is found to be the Mathews JET A MARI~Iarks 2002 printer which has multiple linearly aligned ink jets.
The aligned ink jets are positioned transverse to the length of the board. The individual jets intermittently discharge ink as the board is passing by to create a two-dimensional image on the board. This provides a high level of flexibility with respect to the length of the image on the board while utilizing minimal space and components for the print apparatus.
Moreover, the printing is controlled by the control processor to be coordinated with the movement of the boards and thus does not control or restrict the flow of lumber through the system as is tlae case with conventional systems.
The print head may be controlled by a print controller card which is part of the process controller. The print controller is suitably located in the sawing portion or other suitable location. The ink jet printer does not need to be positioned in a window in the vertical wall, and as such, can be on the opposite side of the board. Sinularly, more than one ink jet print head can be utilized on one side of the receiver for more definition in the indicia, several ink jet print heads can be used on opposite sides of the receiver or above the receiver.
FIG. 11 represents a sample indicia which can provide the location position for a stud indicated by the S. In addition to stud locations, other indicia such as part number or description of the particular piece of lumber to be cut can also be provided by the marking station. The ink jet printers can provide z,e pg/07/2005 ~18 53 X306 359 6956 i0receiveC
indicia that provides a cut line for an angled cut if the saw portion is not conFigured to provide such. An alternate indicia generator could be a laser to score the board surface. Either such print head may be mounted to pivot as the board travels by to momentarily follow the board such that the indicia forming media can be adequately disposed on the board surface.
Also illustrated in FIGS. 3 and 10, is a first board end sensing station 31.2 comprised of at least one presence sensing sensor 332 and ideally a plurality of such sensors. In a preferred embodiment, such presence sensing sensors will be optical sensors ideally utilizing a light beams) from the light beam generators) 33~ positioned opposite the receiver from the sensors 10 thus producing a horizontal sensing region. Alternatively, the optical sensors can be of the type with the light generating means adjacent to the light sensor. Other presence sensing sensors could include inductive sensors, capacitive sensors, and mechanical sensors such as micro switches. Such sensors are connected to the control processor and are utilized to detect when the first end or proximal end of the board passes by the sensors. Utilization of the vertically aligned plurality of sensors allows for sequential activation of the sensors For detecting angled cuts on the proximal board end based upon the timing of the sequential activations and the distanced traveled by the carriage and the board as provided by the encoder. Moreover, the actual height of the board can be determined to an accuracy dependent upon the vertical spacing of the sensors. Similarly, sensors facing upward or downward and having a vertical sensing region and spaced transverse to the path-of travel can be utilized to detect angled cuts as seen from the plan view.
In an embodiment incorporating certain aspects of the invention without the carriage engaging the distal ends of the boards, additional presence sensing sensors, i.e. optos can be utilized along the receiver to form a second board end sensing station. 'Thus, the control processor can determine the length of a board being conveyed down the receiver by registering the activations of the first and second board end sensors as well as calculating the travel of the board.
Referring to FIGS. 1 and 12, a board-feeding portion 26 of the invention configured as a magazine feeder is illustrated. Details of the mechanism are illustrated in FIG. 12. 'This board-feeding portion has a plurality of magazines 3G2, 363, 3G~ which may be manually or automatically loaded. Such magazines may be utilized for different sizes, grades, lengths or kinds of lumber. As illustrated one magazine may be utilized for 2~G's and another magazine may be utilized for''x~'s or unc magazine may hold 8-foot board lengths while another magazine holds 12-Foot lengths. 'fhe stacks of wood are constrained by pairs of guide portions 3fi5 defining slots 3G6. 'the board feeding portion deposits in a serial manner on the live deck boards from selected magazines. The boards in each magazine arty retained therein by a powered dual SUBSTITUTE SHEET (RULE 26) retention mechanism 37(.l. Said mechanism utilizes a lever arm 372 with first and second engagement portions 37~, 37~ on opposite sides of a pivot point 380. The lover ann is shi fted between a first position as shown in the second magazine 363 by the actuation and extension of the powered member 38? which is part of a pneumatic cylinder 38~ to a second position as illustrated in the third magazine 364. In the Frst position the first engagement portion is in an obstructing position with the lower most board 386 and the second engagement portion is in a release or non-clamping position. In the second position the first engagement portion is pivoted out of the obstructing position to release the low ernlost board and the second engagement portion is pivoted into a clamping position with the adjacent board 3$7 next in position in the 1 U magazine. After the board in the first magazine position is deposited onto the transverse board conveyor ?8 the pneumatic actuation is reversed and the clamping portian is removed from the next board, the first engagement partion is moved to the interference position and the adjacent board and stack falls to engage and stop at the first engagement portion thereby stopping the further discharge of boards from that particular magazine. Actuation of each pneumatic cylinder for each magazine is controlled by the process controller. The dashed lines illustrate the path of travel.
Referring to FIGS. 13, 1~, 15 and 16 alternative embodiments for the multiple board magazines SUO which feed onto the live deck 28 for conveyance into the board extrusion portion ~0 2?. As illustrated in FIGS. 13 and 16 the different magazines will suitably be utilized for different sizes of lumber, for example different lengths of lumber as illustrated. Thus the control processor can control the sequence of boards released for a specific job.
Moreover, these particular magazines can be utilized for recycling odd size lumber or previously cut or scrap lumbar as illustrated in FIG. 16 in the first and second magazines 510, 511.
Indicators such as ?5 light bulbs 516 can be provided to indicate when a particular magaaine is below a particular level.
The magazines as illustrated in FIGS. 13, 1 d. and 15 each have a plurality of board racks 519 which utilize a plurality of individual vertical carriages 5?U which slide upon a rail 522 and 30 which are upwardly biased by springs 5?4. An actuator 5?8 operates to lower the vertical magazine 5?0 down where the lowermost board 53? is engaged by the horizontal conveyor'8.
Note in FIG. 1~ a portion of the conveyor is brolcen away for clarity of illustratian. A retention member 536 can be adjustable to allow the various magazines to accommodate different sizes of boards and, in particular, different ihicknesses. As shown in FIG. 15 the retention member 536 35 will assure that the board adjacent to the lower most board 53~ is not pulled out of the magazine when the lower most board is nwved oLlt laterally. The actuator 5'_8 operates to lower the carriage and is contrulled by the contrul processor.
SUBSTITUTE SHEET (RULE 26) 1' FIG. 16 illustrates an alternative embodiment in which the magazines each comprise racks 519 with vertical supports 5~.0 to form a magazine with a forward exit slot 5~0 to and have an injection plunger S~G to discharge flue lover most board out of the stack of boards in the magazine. Typically there would be a plunger For each separate rack relative to each magazine.
The magazines designated for recycling are used in conjunction with the capabilities of prefewed embodiments of the system which measure the length of the board. The control processor can be suitably configured to optimize and select particular sized boards to be cut from each measured board. Moreover, the angles of cuts on the ends of the lumber being recycled can be determined as described above.
In addition to the magazine board feeders an additional bunk feeder or other board feeding arrangement such as manually laying the boards on the transverse board conveyor may, of course, be utilized.
Referring to FIG. 17 a block diagram showing the intercomlection of the process controller to the various portions and components of the equipment embodying the invention.
The process controller can be a single computer or several interconnected computers and as such can include a local area netv~~ork, When used herein, "process controller"
includes all of the 2p above and also can include individual control cards for the specific portions of the equipment, i.e. the print head. Each of the separate portions will typically have sensors such as a proximity sensors, and actuators. When used herein, actuator includes fluid operated cylinders, either hydraulic or pneumatic, electric nrotors, including linear motors, solenoids and any other powered mechanism. Moreover, any of these sensors illustrated as being positioned on one of the portions could often be arranged on a different portion or component of the apparatus with similar performance and without being beyond the boundaries of the invention claimed herein.
For example, the clamping rollers could be placed either on the board-extruding portion as portrayed or on the sawing portion.
~U Referring to FIG. 18, a more detailed Systems Interconnectiun Block diagram is shown that is suitable for equipment embodying the invention. The data transfer process, programming of the process controller, and control of the various actuators is by conventional means familiar to those knowledgeable in such art.
Referring to FIG. 19, a suitable flues chart for the process controller is illustrated.
The present invenliot~ may be embudied iv other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodiment be SUBSTITUTE SHEET (RULE 26) I .~
considered in all respects as illustrative and not restrictive, reference being made to the appended claims rather than to the foregoing description to indicate the scope of the invention.
SUBSTITUTE SHEET (RULE 26)
Claims (9)
1. A method for automated sawing and marking each board of a series of boards, the method comprising the steps of:
a) placing a series of boards on a conveyor;
b) automatically controlling by a computerized process controller: a lengthwise conveyance of boards on the conveyor, a marking station, and a sawing station;
c) gripping each individual board to convey said board lengthwise;
d) calculating with the computerized process controller stud location positions on each board;
e) calculating with the computerized process controller locations on the board to be sawed;
f) advancing each board toward the sawing station;
g) printing two dimensional stud location indicia on the boards at the stud location positions by a printing mechanism at the marking station without contacting each board with the printing mechanism;
h) performing step g without stopping the advancing of each board; and i) performing a sawing operation with a chop saw at the sawing station on each board at the locations to be sawed.
a) placing a series of boards on a conveyor;
b) automatically controlling by a computerized process controller: a lengthwise conveyance of boards on the conveyor, a marking station, and a sawing station;
c) gripping each individual board to convey said board lengthwise;
d) calculating with the computerized process controller stud location positions on each board;
e) calculating with the computerized process controller locations on the board to be sawed;
f) advancing each board toward the sawing station;
g) printing two dimensional stud location indicia on the boards at the stud location positions by a printing mechanism at the marking station without contacting each board with the printing mechanism;
h) performing step g without stopping the advancing of each board; and i) performing a sawing operation with a chop saw at the sawing station on each board at the locations to be sawed.
2. A method for sawing and marking boards according to claim 1 further comprising the step of utilizing a laser to score the surface of the board to accomplish the printing step.
3. A method for sawing and marking boards according to claim 1 wherein the printing step further comprises the step of intermittently discharging ink from a plurality of aligned ink jets as the board is passing said ink jets to create a two dimensional image on the board.
4. A method for sawing and marking boards according to claim 1 further comprising the step of individually depositing boards on the conveyor from a plurality of magazines to provide the series of boards.
5. An automated sawing system comprising:
a) an extruding portion for receiving individual boards and for advancing each individual board longitudinally along a path of travel, b) a sawing station adjacent to the extruding portion into which said individual boards are advanced, the sawing station including a rotating saw blade moveable into and out of the path of travel of the board, and c) a process controller connected to the extruder portion and the sawing station, the process controller providing automated control of the sawing system, and d) a plurality of board magazines placed above the horizontal conveyor, each magazine holding a stack of boards and having a board release for releasing individual boards, the magazines each individually controlled by the process controller to release individual boards from selected magazines for feeding into the extruding portion.
a) an extruding portion for receiving individual boards and for advancing each individual board longitudinally along a path of travel, b) a sawing station adjacent to the extruding portion into which said individual boards are advanced, the sawing station including a rotating saw blade moveable into and out of the path of travel of the board, and c) a process controller connected to the extruder portion and the sawing station, the process controller providing automated control of the sawing system, and d) a plurality of board magazines placed above the horizontal conveyor, each magazine holding a stack of boards and having a board release for releasing individual boards, the magazines each individually controlled by the process controller to release individual boards from selected magazines for feeding into the extruding portion.
6. An automated sawing system according to claim 5 further comprising a horizontal conveyer positioned below the magazines for feeding the boards into the extruding portion, the horizontal conveyor conveying the boards in a direction transverse to their length.
7. An automated sawing system according to claim 6 further comprising a plurality of board magazines placid above the horizontal conveyor, each magazine holding a stack of boards and having a board release for releasing individual boards, the magazines each individually controlled by the process controller to released individual boards onto the live deck.
8. An automated system for processing a series of boards, the boards each having a width, a length, a first end and a second end, the system comprising:
a) a live deck for moving the series of boards along the path of travel in a direction transverse to their length, the deck including a receiving region, at least one conveying member for moving the individual boards down the live bed;
b) a plurality of board magazines placed above the live deck, each magazine holding a stack of like boards and having a board release for releasing individual boards from the respective magazine;
c) a board receiver placed off the end of the live bed to accept serially each board form the live deck, the receiver having a floor portion, a first side and an opposite second side defining a recess, and the boards movable longitudinally down the recess towards a first end of the channel;
d) a carriage assembly moveable along the board receiving channel to grip the board and advance the board longitudinally with the first end first, the carriage having a clamping member moveable to pinch each individual board against one of the first side and second side;
e) a rotating circular saw moveable into the path of travel at a sawing location; and f) a process controller connected to the system for controlling the live bed, the rotating circular saw, and the plurality of board magazines whereby a selected series of boards can be selected and sawed.
a) a live deck for moving the series of boards along the path of travel in a direction transverse to their length, the deck including a receiving region, at least one conveying member for moving the individual boards down the live bed;
b) a plurality of board magazines placed above the live deck, each magazine holding a stack of like boards and having a board release for releasing individual boards from the respective magazine;
c) a board receiver placed off the end of the live bed to accept serially each board form the live deck, the receiver having a floor portion, a first side and an opposite second side defining a recess, and the boards movable longitudinally down the recess towards a first end of the channel;
d) a carriage assembly moveable along the board receiving channel to grip the board and advance the board longitudinally with the first end first, the carriage having a clamping member moveable to pinch each individual board against one of the first side and second side;
e) a rotating circular saw moveable into the path of travel at a sawing location; and f) a process controller connected to the system for controlling the live bed, the rotating circular saw, and the plurality of board magazines whereby a selected series of boards can be selected and sawed.
9. A system for conveying along a path of travel for processing a specified series of elongate individual boards, the boards each having a width, a length, a first end and a second end, the system comprising:
a) a conveyor providing a path of travel leading to a processing station, b) a plurality of board magazines placed above the conveyor, each magazine holding stack of like boards and having a board release for releasing individual boards from the respective magazine, and c) a process controller connected to the plurality of board magazines, the conveyor and the magazines each individually controlled by the process controller to release individual boards in a series onto the live deck to form the specified series of boards to be processed.
a) a conveyor providing a path of travel leading to a processing station, b) a plurality of board magazines placed above the conveyor, each magazine holding stack of like boards and having a board release for releasing individual boards from the respective magazine, and c) a process controller connected to the plurality of board magazines, the conveyor and the magazines each individually controlled by the process controller to release individual boards in a series onto the live deck to form the specified series of boards to be processed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41755600A | 2000-10-13 | 2000-10-13 | |
| PCT/US2000/028380 WO2002032635A1 (en) | 2000-10-13 | 2000-10-13 | Automated board processing apparatus |
| US09/417,556 | 2000-10-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2398768A1 CA2398768A1 (en) | 2002-04-25 |
| CA2398768C true CA2398768C (en) | 2006-10-10 |
Family
ID=23654458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002398768A Expired - Lifetime CA2398768C (en) | 2000-10-13 | 2000-10-13 | Automated board processing apparatus |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2398768C (en) |
| WO (1) | WO2002032635A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3566936A (en) * | 1965-12-22 | 1971-03-02 | Alexander J Golick | Lumber sorting method |
| US3811353A (en) * | 1971-12-30 | 1974-05-21 | Lumber E Co | Apparatus for cutting lumber to specified clear lengths |
| US4220115A (en) * | 1978-03-23 | 1980-09-02 | Armstrong Cork Company | Lumber marking apparatus |
| US4392204A (en) * | 1980-12-01 | 1983-07-05 | Prim David F | Lumber marking system |
| US4926917A (en) * | 1989-07-10 | 1990-05-22 | Eberhard Kirbach | Feed speed and guide arm control for sawing logs |
| US6089135A (en) * | 1994-09-20 | 2000-07-18 | Murray; Robert J. | Method and apparatus for bucksawing logs |
-
2000
- 2000-10-13 CA CA002398768A patent/CA2398768C/en not_active Expired - Lifetime
- 2000-10-13 WO PCT/US2000/028380 patent/WO2002032635A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002032635A1 (en) | 2002-04-25 |
| CA2398768A1 (en) | 2002-04-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7011006B2 (en) | Automated board processing apparatus | |
| EP1642663B1 (en) | Automated board processing apparatus | |
| US6901832B2 (en) | Method and apparatus to remove pieces cut from a bar-shaped workpiece with a cutting machine | |
| US20190291295A1 (en) | Rotary positioning fence | |
| SE453269B (en) | PROCEDURE AND DEVICE FOR CUTTING Lumber | |
| US6817392B2 (en) | Apparatus for shaping timbers with improved timber control | |
| CA2398768C (en) | Automated board processing apparatus | |
| JP3509774B2 (en) | Rebar processing equipment | |
| CA2394560C (en) | Log merchandiser | |
| AU2005203658B2 (en) | Automated board processing apparatus | |
| US20090211665A1 (en) | Sawing apparatus and method for using a sawing apparatus | |
| SE520106C2 (en) | Feeding device | |
| US20070039664A1 (en) | Saw infeed system | |
| EP2250007B1 (en) | Crossclipping and bundling system for veneer packets | |
| US5370166A (en) | Log organizer | |
| US20070028729A1 (en) | Infeed system with automated workpiece orientation | |
| CZ148996A3 (en) | Device for working wood workpieces in their longitudinal direction | |
| JP2001278531A (en) | Paper transport device | |
| JPH0952616A (en) | Article separation and transport device | |
| JPH08290402A (en) | Device for working core material | |
| JP2002086414A (en) | Apparatus and method for cutting | |
| JPS609534A (en) | Automatic processing equipment for long parts | |
| JPH0786051B2 (en) | Sheet bundle transport device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20201013 |