US2961017A - Common drive for raising the top feed rollers and advancing the rollers of frame saws - Google Patents

Common drive for raising the top feed rollers and advancing the rollers of frame saws Download PDF

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Publication number
US2961017A
US2961017A US716158A US71615858A US2961017A US 2961017 A US2961017 A US 2961017A US 716158 A US716158 A US 716158A US 71615858 A US71615858 A US 71615858A US 2961017 A US2961017 A US 2961017A
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US
United States
Prior art keywords
rollers
hydraulic
feed rollers
raising
frame
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
Application number
US716158A
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English (en)
Inventor
Traben Josef
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Filing date
Publication date
Priority to DEP47960A priority Critical patent/DE823653C/de
Priority to CH296744D priority patent/CH296744A/de
Priority to AT183943D priority patent/AT183943B/de
Priority to FR1022912D priority patent/FR1022912A/fr
Priority to GB22312/55A priority patent/GB790440A/en
Application filed by Individual filed Critical Individual
Priority to US716158A priority patent/US2961017A/en
Application granted granted Critical
Publication of US2961017A publication Critical patent/US2961017A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
    • B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
    • B27B3/14—Arrangements for raising or lowering the feed rollers
    • 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
    • B27B3/00—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks
    • B27B3/02—Gang saw mills; Other sawing machines with reciprocating saw blades, specially designed for length sawing of trunks with vertically-reciprocating saw frame
    • B27B3/16—Driving mechanisms for the feed rollers
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6475—With means to regulate work-feed speed
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6579—With means to press work to work-carrier
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6584—Cut made parallel to direction of and during work movement
    • Y10T83/6635—By feed roller
    • Y10T83/6636—Pinch rollers

Definitions

  • a hydraulic control piston acts on the one end of the shaft of the top feed roller, the two racks of which are coupled together through an idler pinion shaft.
  • This construction does not, however, prevent tilting because, during the upward or downward movement of the toothed racks, the lower surfaces of the teeth on one rack and the upper surfaces of the teeth on the other rack always rest against the corresponding pinion-shaft teeth.
  • a sprocket is keyed onto one end of the pinion shaft which raises and lowers the toothed rack, and a chain, on which the control piston of a horizontally mounted hydraulic cylinder acts, runs over the sprocket.
  • the thrust movement of the piston is only converted into the rotary movement of the pinion shaft through the chain drive, as a result of which the transmission system becomes complicated, liable to breakdown, and inaccurate, particularly in the event of a reversal of movement.
  • a hydraulic adjustment which meets all the requirements is provided in a simple manner on a frame saw having a saw frame comprising at least one adjustable top feed roller and at least one bottom driving roller, the article to be sawn being conveyed between these rollers, at least one toothed rack on which the top feed roller is supported in the frame, and a shaft which is mounted in the frame and has a pinion which is operationally connected to the toothed rack, the combination of a hydraulic rotary motor, a rotary pump for the hydraulic rotary motor, and an electric motor in driving connection with the pump of a regulating device in order to control the output of the hydraulic rotary motor, the hydraulic rotary motor being directly coupled to the shaft carrying the pinion as a result of which the toothed rack and the top feed roller can be moved up and down and the material being sawn is weighted when the top feed roller rests thereon with a pressure which is derived from the initial torque of the hydraulic rotary motor.
  • a further important advantage of the common drive according to the invention consists in that the speedtorque characteristic of the infinitely variable hydraulic rotary motor is also effective for the rotary drive of the feed rollers, in a manner which is desirable for frame-saw operation because with large diameter logs, a high feed power is available with a slow rate of feed, in keeping with and necessary for the heavy pressure of the top rollers, and conversely, with small diameter logs, a low feed force is available with a high rate of feed in keeping with and desirable for the low pressure of the top feed rollers.
  • Figure 1 shows a hydraulic adjusting and driving device according to the invention, seen from the side of the frame;
  • Figure 3a shows a section along the line II in Figure 1 with the rotor in such a position that the pump is delivering;
  • Figure 3b shows a section on the line II of Figure 1 with the rotor in such a position that the pump is not delivering;
  • Figure 4 shows a torque-speed characteristic curve for the rotary hydraulic drive of the saw frame, the position of the top feed rollers being illustrated in diagrammatic form for three different operating points.
  • each hydraulic unit or motor 1 serves to' adjust the height of a front and rear top feed roller.
  • the torque produced by each hydraulic unit or motor 1 is transmitted through coupling members 2 and the shaft 3 which is provided with teeth by milling and known as a pinionshaft, and the toothed rack 4, to the shaft of the top feed roller 5 ( Figure 2) so that the latter is raised or lowered or, if it is resting on the log, is weighted.
  • the container for the hydraulic medium for example oil
  • the container for the hydraulic medium for example oil
  • the rotor 23 of the hydraulic pump 6 or 7 is mounted, as shown in Figures 3a and 317, on the shaft 24 which is displaceable parallel to itself within the interior 25 of the stator, by actuation of the hand lever 11.
  • the diam eter of the interior 25'of the stator is larger than the diameter of the rotor 23.
  • the rotor 23 comprises deep grooves 26 which are arranged radially and in which are radial vanes 27 of rubber or the like which are constantly urged outwards, by resilient force, against the inner wall of the stator housing.
  • the hydraulic motors 1 may also be equipped with control rotors of the type which are actuated by means of the hand lever 20, or both the pumps and motors may comprise control rotors.
  • Figure 4 shows the torque-speed characteristic of such a drive for a saw-frame.
  • the particular operating point is selected by actuating the hand lever of the control rotors. As can be seen from the three diagrams, the selection of the operating point depends on the thickness of the log to be sawn.
  • a high pressure which corresponds to a heavy torque transmitted through the coupling 2, is necessary with large diameter logs in order to hold the heavy logs reliably in position.
  • the adjusting speed of the feed rollers only needs to be low because the large diameter of the log only leaves a small distance for the feed rollers to travel.
  • the log leaves a large distance over which the feed rollers have to travel quickly so as to save time.
  • the operating condition is met that the pressure should be low because otherwise there is a risk of a curved cut, for example as a result of distortion of the log as a result of the combination of high pressure and unevenness in the log.
  • Remote-control members which. are controlled in the usual manner, may, if necessary, act on the operating levers 11, 12 and 20.
  • the drive of the pumps 6, 7 is effected by means of two belt drivm 13, 14 which are driven by the electric motor 15 provided for the joint drive of the lifting means and the feed.
  • the motor also drives an infinitely variable rotary hydraulic gear 22, which comprises an infinitely variable oil pump and an infinitely variable oil motor, both of which may be similar in construction to the pumps 6, 7 and the motors 1 and which are actuated bymeans of the common lever 16.
  • the gear 22 drives the feed rollers 18 through the bevel wheels 17 and other transmission members.
  • the known characteristic of the infinitely variable hydraulic rotary motor which can be utilized according to the invention has an advantageous effect not only for raising and lowering, the roller but also for the advance of the logs according to the operational requirements which exist, in that the particular efiects desired for raising and feed are provided simultaneously.
  • a heavy torque is needed for the feed, with a low rate of feed and conversely, when the timber has a small diameter, a low torque is needed with a high rate of feed.
  • the heavy torques for raising and feed as well as the low torques always appear simultaneously, so that the requirements of frame-saw operation both for lifting and feed can always be met to. the best advantage.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Vending Machines For Individual Products (AREA)
  • Earth Drilling (AREA)
US716158A 1949-07-05 1958-02-19 Common drive for raising the top feed rollers and advancing the rollers of frame saws Expired - Lifetime US2961017A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DEP47960A DE823653C (de) 1949-07-05 1949-07-06 Vorschubtriebwerk fuer die Vorschubwalzen von Gattersaegen
CH296744D CH296744A (de) 1949-07-05 1950-03-18 Gattersäge.
AT183943D AT183943B (de) 1949-07-05 1950-03-28 Gattersäge zur Herstellung von Schnittholz verschiedener Stärken
FR1022912D FR1022912A (fr) 1949-07-05 1950-07-05 Scie alternative et en particulier scie alternative avec cadre à plusieurs lames
GB22312/55A GB790440A (en) 1949-07-05 1955-08-03 Improvements in and relating to frame saws
US716158A US2961017A (en) 1949-07-05 1958-02-19 Common drive for raising the top feed rollers and advancing the rollers of frame saws

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE1022912X 1949-07-05
DE296744X 1949-07-05
DE183943X 1949-07-05
DEP47960A DE823653C (de) 1949-07-05 1949-07-06 Vorschubtriebwerk fuer die Vorschubwalzen von Gattersaegen
GB22312/55A GB790440A (en) 1949-07-05 1955-08-03 Improvements in and relating to frame saws
US716158A US2961017A (en) 1949-07-05 1958-02-19 Common drive for raising the top feed rollers and advancing the rollers of frame saws

Publications (1)

Publication Number Publication Date
US2961017A true US2961017A (en) 1960-11-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US716158A Expired - Lifetime US2961017A (en) 1949-07-05 1958-02-19 Common drive for raising the top feed rollers and advancing the rollers of frame saws

Country Status (6)

Country Link
US (1) US2961017A (de)
AT (1) AT183943B (de)
CH (1) CH296744A (de)
DE (1) DE823653C (de)
FR (1) FR1022912A (de)
GB (1) GB790440A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618645A (en) * 1968-10-10 1971-11-09 Ostbergs Fabrik Ab Arrangement at feeding tree trunks for trimming by shearing
US5195415A (en) * 1992-01-24 1993-03-23 Sweed Machinery, Inc. Apparatus for cutting elongate pieces
RU2687035C1 (ru) * 2018-03-23 2019-05-06 Михаил Анатольевич Блохин Многопильный блок с электромеханическим позиционированием пильных модулей

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817375A (en) * 1949-07-05 1957-12-24 Traben Josef Drive for the feed rollers of frame saws
DE823653C (de) * 1949-07-05 1951-12-06 Linck Maschf & Eisen Vorschubtriebwerk fuer die Vorschubwalzen von Gattersaegen
DE906142C (de) * 1950-11-04 1954-03-11 Esterer A G Maschf Hydraulischer Vorschubwalzenantrieb fuer Vollgatter
DE1043817B (de) * 1955-03-25 1958-11-13 Martin Willuhn Zahnradpumpe
GB924727A (en) * 1960-06-01 1963-05-01 Union Ind Proprietary Ltd Improvements in and relating to conveying mechanisms, such as for use with saws

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE57373C (de) * J. F. V. SEVEREN in Alost, Belgien Gattersäge zum gleichzeitigen Zerschneiden mehrerer Balken
DE666776C (de) * 1938-11-19 Esterer Akt Ges Maschf Fahrbares Vollgatter mit seitlich angeordnetem Antrieb mittels Fest- und Losscheiben
US2234009A (en) * 1939-04-03 1941-03-04 Vickers Inc Power transmission
US2569842A (en) * 1947-03-12 1951-10-02 George E Zweifel & Company Sawmill hydraulic carriage assembly
GB790440A (en) * 1949-07-05 1958-02-12 Gebrüder Linck Maschinenfabrik Und Eisengiesserei Gatter-Linck Improvements in and relating to frame saws

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE57373C (de) * J. F. V. SEVEREN in Alost, Belgien Gattersäge zum gleichzeitigen Zerschneiden mehrerer Balken
DE666776C (de) * 1938-11-19 Esterer Akt Ges Maschf Fahrbares Vollgatter mit seitlich angeordnetem Antrieb mittels Fest- und Losscheiben
US2234009A (en) * 1939-04-03 1941-03-04 Vickers Inc Power transmission
US2569842A (en) * 1947-03-12 1951-10-02 George E Zweifel & Company Sawmill hydraulic carriage assembly
GB790440A (en) * 1949-07-05 1958-02-12 Gebrüder Linck Maschinenfabrik Und Eisengiesserei Gatter-Linck Improvements in and relating to frame saws

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618645A (en) * 1968-10-10 1971-11-09 Ostbergs Fabrik Ab Arrangement at feeding tree trunks for trimming by shearing
US5195415A (en) * 1992-01-24 1993-03-23 Sweed Machinery, Inc. Apparatus for cutting elongate pieces
RU2687035C1 (ru) * 2018-03-23 2019-05-06 Михаил Анатольевич Блохин Многопильный блок с электромеханическим позиционированием пильных модулей

Also Published As

Publication number Publication date
DE823653C (de) 1951-12-06
FR1022912A (fr) 1953-03-11
AT183943B (de) 1955-11-25
GB790440A (en) 1958-02-12
CH296744A (de) 1954-02-28

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