US3373778A - Sawmill capable of high production and lumber quality control operable by one man - Google Patents

Sawmill capable of high production and lumber quality control operable by one man Download PDF

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US3373778A
US3373778A US46973765A US3373778A US 3373778 A US3373778 A US 3373778A US 46973765 A US46973765 A US 46973765A US 3373778 A US3373778 A US 3373778A
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log
board
sawmill
lumber
man
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Charles E Mcmanama
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B31/00Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/08Discharging equipment
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/202With product handling means
    • Y10T83/2092Means to move, guide, or permit free fall or flight of product
    • Y10T83/22Means to move product laterally
    • Y10T83/2205Reciprocating means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/647With means to convey work relative to tool station
    • Y10T83/6492Plural passes of diminishing work piece through tool station
    • Y10T83/6499Work rectilinearly reciprocated through tool station
    • Y10T83/6508With means to cause movement of work transversely toward plane of cut
    • Y10T83/6515By means to define increment of movement toward plane of cut
    • Y10T83/6518By pusher mechanism

Definitions

  • each function can be correlated to the other in such a manner that the operator upon seeing a sawed face of a log after removal of a slab or previous board knows immediately where to set the main saw, where to set the edger saws, and where to set the trim saws.
  • the trim saws can at that time be set in preparation to trim the board after removal of the board laterally from the log in a precisely predictable course to the trimmer.
  • sorting gates can be opened in preparation for this board as it,
  • FIGURE 1 is a side view of the bandsaw supporting side rail assembly as it straddles a log.
  • FIGURE 2 is a sectional view of FIGURE 1 at a point across the middle of the log, looking from the lefthand end.
  • FIGURE 3 is a schematic view of all functions, showing relative positions of each operation and the unique proximity of these functions to a position of control.
  • FIGURE 1 essentially portrays the parallel side rails b-l and b-Z as they straddle a log d and are supported in an adjustable calibrated manner thereupon by means of attachment to columns 0.
  • FIGURE 2 portrays in detail the board ejecting system as it is mounted from the side rail [2-1 in which ram spindle q pushes slab r from the log d over telescoping guide surfaces s of telescoping guide g and over side rail member b-Z.
  • Bracket u with collar t supports the ram cylinder p in a position around and away from the guiding surface of side rail b-l so that when ram spindle q is fully retracted into ram cylinder p the bandsaw carriage (not shown) is permitted to traverse unobstructed.
  • the ram spindles q can be extended to forcibly eject the board or slab r from its resting place upon the log d, and can do sorepeatedly as each successive board is sawed.
  • Telescoping guide g bears against the side of the log as the side rails are lowered upon the log in sawing successive cuts therefrom, rollers k, l, and m rolling against the side of the log to force the slide g to retract.
  • the mechanism represented by box o is a supplementary power source for retracting slide g in event the log is misshapen to a degree that rollers k, l, and m are ineffective without this supplementary action.
  • Slide assembly g composed of telescoping members is is supported by member h which is supported from side rail b2 in bearing 1', is held in position against the log by spring 1'.
  • Log d is held in position by head blocks e.
  • the traversing saw components supported upon side rails b1 and [7-2 are not shown, being known to the industry and serving no direct purpose in expressing the invention.
  • FIGURE 3 of the drawings a schematic drawing is shown illustrating a convenient proximity of control in which one operator may effectively observe and control all operations of a sawmill
  • lateral log chain 1 delivers logs as needed to the traversing horizontal bandsaw and integrated edger 2 where each log is sawed into edged boards from which board ejectors 3 remove each board as it is sawed to a lumber conveyor chain 4 which carries each board over a slab and lumber waste gate 5, through a trimmer 6, operator controlled sorting gates 7, and automatic sorting gates 8.
  • the slab and lumber waste gate 5 is manually operated in conjunction with the board ejector 3 in an openable portion of the conveyor chain 4 and by which slabs and lumber waste may be released from the chain 4.
  • a board After passing over slab and'lumber waste gate 5, a board then goes to the trimmer 6 in direct line laterally from the log from which it was sawed, thereby enabling the trim saws to be accurately set before the board leaves the log. From the trimmer 6 the board passes upon the conveyor chain over the operator controlled sorting gates 7 where boards can be selectively removed from the chain by the operator. In a practical sawmill, each board thereby removed would again be sorted in an additional conveyor system by automatic sorting gates. Manual control would normally sort lumber by specie and grade, and automatic control would sort lumber by dimension. However, for simplicity of illustration only one of each type sorting gate on the conveyor chain is shown. After passing through a series of such sorting gates, the lumber is thereby deposited and sorted into respective proper piles.
  • the operator at the operator control panel 11 easily observe and controls everything within rectangular area it
  • the operator controlled sorting gates 7 are not necessarily in this rectangular area of observed control it) since precisely delayed actuation thereof for sorting of specie and grade is facilitated by memory type control devices and would not require much attention.
  • This rectangular area as illustrated can easily be within an area twenty feet square, whereas in other type sawmills the function therein would probably occupy five times the area.
  • a means to eject a board from its resting place upon the log after it is sawed comprising a mechanism extendable to push the board laterally from the log, retractable out of the path of the traversing saw, and mounted from one of said side rails.
  • said board ejecting means comprising a plural number of ram cylinders spaced and rigidly mounted to the outside of one of the paired side rails out of the path of the traversing saw when the piston spindles of said cylinders are retracted, the said piston spindles acting within the geometrical plane of the sawed board and adapted to engage the side of the board and eject it laterally from the log.
  • said board ejecting means is supplemented by guide devices to direct the path of the ejected board over the opposite side rail from said cylinders, comprising a number of elements spacedly attached along the inside of the said up posite side rail and having means to be automatically maintained sufficiently close to the log that a board may not fall therebetween.
  • the elements comprising said guide devices having as guide surfaces telescoping type structures adapted to extend to the side of the log and adjustably accommodate a varying spacial relationship thereto.
  • a lumber trimmer laterally adjacent thereto having lateral alignment to the log, and connected thereto by a lateral lumber conveyor chain adapted to receive a board that has been laterally ejected from the log and conveys the board through the trimmer.
  • DONALD R SCI-IRAN, Primary Examiner.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Attitude Control For Articles On Conveyors (AREA)

Description

March 19, 1968 c, MCMANAMA 3,373,778
SAWMILL CAPABLE OF HIGH PRODUCTION AND LUMBER QUALITY CONTROL OPERABLE BY ONE MAN Filed July 6, 1965 2 SheetsSheet l INVENTOR. 7 CHARLES EMCMANAMA 3 BY E. M MANAMA SAWMILL CAPABLE OF HIGH PRODUCTION AND LUMBER March 19, 1968 c.
QUALITY CONTROL OPERABLE BY ONE MAN 2 Sheets-Sheet 2 Filed July 6, 1965 m wI INVENTOR AD mhtuqmv QZCQOm OMJJOwC-ZOO KOHdiMEO TE 2310 mO m ZOU mmmiDJ Amv mhqmv M104; mmmzDJ w md w Amv wmOhUmwm OWZOE llllllllllllllllllll IIAIIIQIs ||l amok/Ewan! .F I I I I ,L
CHARLES E. MC MANAMA United States Patent SAWMILL CAPABLE OF HIGH PRODUCTION AND LUMBER QUALITY CONTROL OPERABLE BY ONE MAN Charles E. McManama, Latah County, Idaho (Rte. 2, Box 81, Potlatch, Idaho 83855) Filed July 6, 1965 Ser. No. 469,737 5 Claims. (Cl. 14319) ABSTRACT OF THE DISCLOSURE A sawmill combination using a horizontal traversing bandsaw as the head saw traveling on rails over a log to saw boards from the log and a mechanism to eject the board therefrom, with known sawmill components.
In contemporary conventional sawmills it is impossible to control the entire sawing, edging, trimming, and sorting operation by one man because each function thereof is distinctly separate and cannot be correlated to the other functions. However, a way is hereby found using horizontal bandsaw which traverses in sawing upon parallel side rails which straddle a log and are adjustable upon the log that successive boards may be sawed therefrom, wherby a correlation of each function to the other can be had where one operator can conveniently and fully control the entire operation from one vantage point.
While in othersawmill designs these operations can conceivably be performed automatically, the profit of a sawmill operation is determined to a great extent by lumber grade recovery. Full operator control is therefore desirable; that higher grades of lumber can be recovered wherever possible.
With this sawmill design each function can be correlated to the other in such a manner that the operator upon seeing a sawed face of a log after removal of a slab or previous board knows immediately where to set the main saw, where to set the edger saws, and where to set the trim saws. This is possible because an edgersaw assembly integrated with the traversing bandsaw edges the board as it is being sawed, and because the log is stationary as it is being sawed, the trim saws can at that time be set in preparation to trim the board after removal of the board laterally from the log in a precisely predictable course to the trimmer. Also, at the same time, sorting gates can be opened in preparation for this board as it,
follows a predictable course through and beyond the trimmer.
Most unique and necessary of this sawmill are devices which remove and convey the board from the log. These devices, attached to the side rail supporting frame and having a fixed position relative to each board as it is sawed, in the form of a simple ram mechanism of paired synchronized cylinders can push the board from the log in a predictable manner to a receiving conveyor chain which carries the board laterally through the trimmer.
By means of a memory type device in the control system presently common to the industry, later functions such as trimming and sorting are accurately controlled at the instant the board is sawed from the log by the precise delaying of the actuation of this control until the board arrives at a respective point.
Other advantage consists of a greatly reduced floor area requirement compared to other sawmills, with consequent lower structural cost.
The foregoing illustrates the essence and values of the invention; particularly how one man control can be effectively accomplished. The following show the advantages which reside in the pertinent detail, reference being had to the accompanying drawings:
FIGURE 1 is a side view of the bandsaw supporting side rail assembly as it straddles a log.
FIGURE 2 is a sectional view of FIGURE 1 at a point across the middle of the log, looking from the lefthand end.
FIGURE 3 is a schematic view of all functions, showing relative positions of each operation and the unique proximity of these functions to a position of control.
Other drawings and information concerning bandsaws which traverse in sawing upon side rails so adjustable upon a log may be seen in the applicants coexisting Patent 3,168,127 and in respect to the bandsaw and its relation to the side rail not herein illustrated.
Referring now in detail to FIGURES 1 and 2 of the drawings, FIGURE 1 essentially portrays the parallel side rails b-l and b-Z as they straddle a log d and are supported in an adjustable calibrated manner thereupon by means of attachment to columns 0. FIGURE 2 portrays in detail the board ejecting system as it is mounted from the side rail [2-1 in which ram spindle q pushes slab r from the log d over telescoping guide surfaces s of telescoping guide g and over side rail member b-Z. Bracket u with collar t supports the ram cylinder p in a position around and away from the guiding surface of side rail b-l so that when ram spindle q is fully retracted into ram cylinder p the bandsaw carriage (not shown) is permitted to traverse unobstructed. After a pass is made, the ram spindles q can be extended to forcibly eject the board or slab r from its resting place upon the log d, and can do sorepeatedly as each successive board is sawed.
Telescoping guide g bears against the side of the log as the side rails are lowered upon the log in sawing successive cuts therefrom, rollers k, l, and m rolling against the side of the log to force the slide g to retract. The mechanism represented by box o is a supplementary power source for retracting slide g in event the log is misshapen to a degree that rollers k, l, and m are ineffective without this supplementary action. Slide assembly g composed of telescoping members is is supported by member h which is supported from side rail b2 in bearing 1', is held in position against the log by spring 1'. Log d is held in position by head blocks e. The traversing saw components supported upon side rails b1 and [7-2 are not shown, being known to the industry and serving no direct purpose in expressing the invention.
Referring now in detail to FIGURE 3 of the drawings, in which a schematic drawing is shown illustrating a convenient proximity of control in which one operator may effectively observe and control all operations of a sawmill, lateral log chain 1 delivers logs as needed to the traversing horizontal bandsaw and integrated edger 2 where each log is sawed into edged boards from which board ejectors 3 remove each board as it is sawed to a lumber conveyor chain 4 which carries each board over a slab and lumber waste gate 5, through a trimmer 6, operator controlled sorting gates 7, and automatic sorting gates 8. The slab and lumber waste gate 5 is manually operated in conjunction with the board ejector 3 in an openable portion of the conveyor chain 4 and by which slabs and lumber waste may be released from the chain 4. After passing over slab and'lumber waste gate 5, a board then goes to the trimmer 6 in direct line laterally from the log from which it was sawed, thereby enabling the trim saws to be accurately set before the board leaves the log. From the trimmer 6 the board passes upon the conveyor chain over the operator controlled sorting gates 7 where boards can be selectively removed from the chain by the operator. In a practical sawmill, each board thereby removed would again be sorted in an additional conveyor system by automatic sorting gates. Manual control would normally sort lumber by specie and grade, and automatic control would sort lumber by dimension. However, for simplicity of illustration only one of each type sorting gate on the conveyor chain is shown. After passing through a series of such sorting gates, the lumber is thereby deposited and sorted into respective proper piles.
The operator at the operator control panel 11 easily observe and controls everything within rectangular area it The operator controlled sorting gates 7 are not necessarily in this rectangular area of observed control it) since precisely delayed actuation thereof for sorting of specie and grade is facilitated by memory type control devices and would not require much attention. This rectangular area as illustrated can easily be within an area twenty feet square, whereas in other type sawmills the function therein would probably occupy five times the area.
The components discussed, except in regard to unique application are known or common devices and would normally need no further explanation, except the board removing mechanism illustrated in FIGURES 1 and 2 previously described and which is new. Together with the board removing mechanism, the sawmill design as a whole is completely new and advantageous.
Having thusly described my invention which I desire to protect by Letter Patent, I make the following claims of invention:
1. In a sawmill of the type using a horizontal bandsaw which traverses in sawing upon supporting paired lateral side rails which straddle a log and in which the setting upon the log to saw successive boards therefrom is determined by the adjustable lowering of said side rails thereupon; a means to eject a board from its resting place upon the log after it is sawed, comprising a mechanism extendable to push the board laterally from the log, retractable out of the path of the traversing saw, and mounted from one of said side rails.
2. In a sawmill as set forth in claim 1, said board ejecting means comprising a plural number of ram cylinders spaced and rigidly mounted to the outside of one of the paired side rails out of the path of the traversing saw when the piston spindles of said cylinders are retracted, the said piston spindles acting within the geometrical plane of the sawed board and adapted to engage the side of the board and eject it laterally from the log.
3. In a sawmill as set forth in claim 2, in which said board ejecting means is supplemented by guide devices to direct the path of the ejected board over the opposite side rail from said cylinders, comprising a number of elements spacedly attached along the inside of the said up posite side rail and having means to be automatically maintained sufficiently close to the log that a board may not fall therebetween.
4. In a sawmill as set forth in claim 3, the elements comprising said guide devices having as guide surfaces telescoping type structures adapted to extend to the side of the log and adjustably accommodate a varying spacial relationship thereto.
5. In a sawmill as set forth in claim 1, a lumber trimmer laterally adjacent thereto having lateral alignment to the log, and connected thereto by a lateral lumber conveyor chain adapted to receive a board that has been laterally ejected from the log and conveys the board through the trimmer.
References Cited UNITED STATES PATENTS 927,248 7/1909 Kennedy 14319 1,487,649 3/1924 Foreman 144-3l2 X 3,285,301 11/1966 McManalna 1431 FOREIGN PATENTS 20,134 9/1913 Great Britain. 787,724 12/1957 Great Britain.
DONALD R. SCI-IRAN, Primary Examiner.
US46973765 1965-07-06 1965-07-06 Sawmill capable of high production and lumber quality control operable by one man Expired - Lifetime US3373778A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0787566A2 (en) * 1995-09-14 1997-08-06 Lindner-Werk Gesellschaft m.b.H. Bandsaw for cutting logs

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US927248A (en) * 1907-07-27 1909-07-06 Donald A Kennedy Sawing-machine.
GB191320134A (en) * 1913-09-05 1914-06-18 William Leonard Braddon Improvements in and relating to Sawing Machines.
US1487649A (en) * 1916-05-18 1924-03-18 Foreman Lemuel Roscoe Sawmill apparatus and method
GB787724A (en) * 1956-03-29 1957-12-11 Giovanni Monateri Log-sawing machine
US3285301A (en) * 1963-11-15 1966-11-15 Charles E Mcmanama Lumber edger saw assembly incorporated into a horizontal traversing bandsaw machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US927248A (en) * 1907-07-27 1909-07-06 Donald A Kennedy Sawing-machine.
GB191320134A (en) * 1913-09-05 1914-06-18 William Leonard Braddon Improvements in and relating to Sawing Machines.
US1487649A (en) * 1916-05-18 1924-03-18 Foreman Lemuel Roscoe Sawmill apparatus and method
GB787724A (en) * 1956-03-29 1957-12-11 Giovanni Monateri Log-sawing machine
US3285301A (en) * 1963-11-15 1966-11-15 Charles E Mcmanama Lumber edger saw assembly incorporated into a horizontal traversing bandsaw machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0787566A2 (en) * 1995-09-14 1997-08-06 Lindner-Werk Gesellschaft m.b.H. Bandsaw for cutting logs
EP0787566A3 (en) * 1995-09-14 1998-10-21 Lindner-Werk Gesellschaft m.b.H. Bandsaw for cutting logs

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