EP0453699B1 - Holzklotzwendevorrichtung - Google Patents

Holzklotzwendevorrichtung Download PDF

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Publication number
EP0453699B1
EP0453699B1 EP19900850160 EP90850160A EP0453699B1 EP 0453699 B1 EP0453699 B1 EP 0453699B1 EP 19900850160 EP19900850160 EP 19900850160 EP 90850160 A EP90850160 A EP 90850160A EP 0453699 B1 EP0453699 B1 EP 0453699B1
Authority
EP
European Patent Office
Prior art keywords
timber
cradle
log
rotator
carriage
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
EP19900850160
Other languages
English (en)
French (fr)
Other versions
EP0453699A1 (de
Inventor
Kurt Janson
Bertil Lönnäs
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.)
AK Eriksson AB
Original Assignee
AK Eriksson AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by AK Eriksson AB filed Critical AK Eriksson AB
Priority to EP19900850160 priority Critical patent/EP0453699B1/de
Priority to DE1990610190 priority patent/DE69010190T2/de
Publication of EP0453699A1 publication Critical patent/EP0453699A1/de
Application granted granted Critical
Publication of EP0453699B1 publication Critical patent/EP0453699B1/de
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
    • B27B29/00—Gripping, clamping or holding devices for the trunk or log in saw mills or sawing machines; Travelling trunk or log carriages
    • B27B29/08—Trunk or log carriages with gripping means designed to pass the saw blade(s), especially for band saws; Arrangement of gripping accessories thereon; Turning devices thereon
    • B27B29/085—Turning devices thereon

Definitions

  • the present invention relates to a timber rotator intended for a log carriage operative to feed timber-pieces through a timber-sawing machine, said timber rotator comprising two arms which have mounted thereon timber-rotating devices and which are mutually connected to form an angle with one another, such as to be able to receive and support a timber workpiece and to rotate said workpiece through a desired angle when required.
  • a log is normally rolled-in from one side of a log carriage and stopped on the carriage by log holders provided on said carriage and displaceable laterally in relation to the forward direction of the carriage, for the purpose of setting desired saw measurements.
  • a vertical surface on the log holders is used as a reference surface to this end.
  • the log carriage is provided with raisable arms provided with spiked chains for co-action with the logs, see for instance FR 1060252 and DE 1503945. Since the logs are rotated against a stationary surface, log rotation generates large frictional forces, in addition to which logs tend to jam as a result of their irregular shape and general unevenness.
  • a similar solution is illustrated and described in DE 1728164. This solution, however, requires the provision of a relatively powerful pneumatic piston-cylinder device 13, since the whole weight of the log shall be lifted by an arm located beneath the log.
  • the main object of the present invention is to provide a timber-rotator which can be fitted to a log carriage and which overcomes the aforesaid drawbacks.
  • the timber-rotator shall be configured so that when a log is rolled onto the carriage, the timber-rotator will receive the logs without damage to the log holders, and so that arms equipped with spiked chains or the like are able to rotate or twist the logs in the absence of any Friction or jamming tendencies. Furthermore, it shall be possible to manoeuvre the arms with the aid of a relatively weak piston-cylinder device.
  • a timber-rotator of the kind described in the introductory paragraph which, in accordance with the present invention, is characterized in that the arms are fixated at a given angle to one another, such as to form a substantially L-shaped cradle for accommodating a timber workpiece; in that said cradle is pivotally suspended at one upper end of the substantially vertically extending leg; in that means are provided for pivoting the cradle about its suspension point in conjunction with receiving, rotating or depositing a timber workpiece.
  • the cradle legs will preferably form essentially a right angle with one another.
  • the timber-rotator will be mounted on the log carriage so as to be embraced on both sides by a log holder provided with an essentially vertical reference surface, said log holders being displaceably transversely in relation to the movement direction of the carriage, and an associated, essentially horizontal support surface on said log carriage.
  • a log holder provided with an essentially vertical reference surface
  • said log holders being displaceably transversely in relation to the movement direction of the carriage, and an associated, essentially horizontal support surface on said log carriage.
  • the respective substantially horizontal and substantially vertical legs of the cradle will be located slightly beneath and slightly behind the support surfaces on the log carriage and the reference surfaces on the log holders.
  • the cradle is therewith conveniently adapted so as to be able to swing forwards and upwards when receiving and possibly rotating a workpiece, so that the workpiece carried by the cradle will pass free from the support and reference surfaces of the log carriage and the log holders.
  • the cradle is preferably swung with the aid of a piston-cylinder device acting between the log carriage and the substantially horizontal leg of the cradle. Since a large part of the weight of the log is taken-up by the journal at the upper end of the vertical leg, the piston of said piston-cylinder device need not be required to exert a large force.
  • the two legs of the cradle are conveniently provided with synchronously-driven spiked chains or corresponding devices.
  • the spiked chain of the substantially vertical leg is driven by a drive wheel which rotates around the pivot axis, and that the other leg is provided with two mutually parallel, spiked chains which are driven by the first mentioned chain via a drive wheel positioned at the junction point of said legs.
  • the timber rotator may also include an upwardly swingable arm equipped with at least one spiked chain or corresponding device and mounted on the outer end of the substantially horizontal cradle-leg. This arm is manoeuvred appropriately with the aid of a piston-cylinder device acting between the arm and the substantially horizontal leg.
  • Figure 1 is a schematic view, from above, of a log carriage equipped with an inventive timber rotator.
  • Figure 2 is a side view taken on the line II-II in Figure 1.
  • Figure 3 is a view taken on the line III-III in Figure 1.
  • Figures 4 and 5 illustrate an inventive timber rotator at work.
  • Figure 6 illustrates the use of a timber rotator in ejecting a residual block.
  • Figures 7-9 illustrate a modified embodiment of an inventive timber rotator and show the timber rotator during three different working moments.
  • the reference numeral 1 identifies generally a log carriage built on two beams 2 and 3 which extend in the longitudinal direction of the carriage.
  • the carriage is movable reciprocatingly in the direction of the arrow A on two rails 4, for the purpose of feeding a log carried by the carriage through, for instance, a bandsaw several times, so as to saw the log into blocks, planks and boards.
  • the log carriage 1 also includes transverse support beams 5 and tower-like holders 6 which are displaceable along said transverse beams in the direction of the arrows B and which function to hold firmly logs rolled-in onto the carriage in the direction of the arrow c.
  • Stationary but pivotally mounted between the log-holder towers 6 are timber rotators 7, each of which has two substantially horizontal spiked-chains 8 and one substantially vertical spiked-chain 9 for rotating the timber-workpieces fed onto the carriage 1.
  • each of the tower-like log-holders 6 includes a vertical reference surface 10, against which a log carried by the support beams 5 abuts while being held firmly with the aid of pairs of mutually co-acting holding devices 11, 12, in a known manner.
  • the reference 10 can be replaced with the leading edge 13 of a straight edge 14 mounted on respective towers 6 and displaceable in parallel, particularly when sawing the last parts of a log.
  • the straight edge 14 is manoeuvred with the aid of a pneumatic piston-cylinder device 15.
  • the reference numeral 16 identifies a motor which is operative to move the log-holding tower 6, via a chain 17, backwards and forwards along the beam 5, in the transverse direction of the carriage, for the purpose of setting desired saw measurements.
  • the carriage runs on wheels 18 co-acting with the rails 4.
  • the reference 19 identifies lateral-guide wheels.
  • FIG 3 is an illustration of an inventive timber rotator in which part of the casing has been cut away.
  • the timber rotator includes two arms provided respectively with spiked chains 8 and 9.
  • the arms are rigidly connected together at one end thereof, to form an L-shaped cradle which functions to receive and rotate a timber workpiece.
  • the arms, or legs 20, 21 of the cradle form a fixed angle with one another, suitably an angle of 90°.
  • the cradle is pivotally suspended from a pivot pin 22 at the upper end of the leg 21.
  • Pivoting of the carriage between the position shown in full lines and the position shown in chain lines is effected by means of a pneumatic piston-cylinder device 23 which acts between the leg 20 and the frame of the log-carriage.
  • the spiked chain 9 extending along the leg 21 is driven by a motor 24, via a chain 25, and a spocket wheel rotatable about the pivot pin 22.
  • the spiked chain 9, in turn, synchronously drives the two spiked chains 8 extending along the leg 20, via an axel 26 and spocket wheel 27.
  • the reference 28 identifies a path operative to feed logs onto the log carriage.
  • Figure 4 shows the position occupied by the timber-rotator when a log 29 is rolled onto the log carriage.
  • the cradle 20, 21 has been swung by the pneumatic piston-cylinder device 23, forwards and upwards around the journal pin 22.
  • the leg 20 is thus located at a slightly higher level than the support beams 5 of the carriage, whereas the leg 21 is located slightly in front of the reference surfaces 10 on the log-holding towers 6.
  • the log 29 has been caught by the timber rotators and brought to a standstill without striking the reference surfaces on said towers, thereby protecting said towers against damage and deformation.
  • the log In the position illustrated in Figure 4 the log is not in abutment with a stationary surface and can thus be readily rotated with the aid of the spiked chains 8 and 9.
  • the spiked chains are driven synchronously, by one and the same motor 24.
  • the L-shaped cradle 20, 21 can be swung-out quite easily with the aid of a single, relatively small pneumatic piston-cylinder device 23, since the major part of the weight of the log 29 is taken-up by the journal pin 22 of the leg 21. Consequently, the piston-cylinder device 23 need only exert a very moderate lifting force. Neither is it necessary to provide complicated steering or control means for synchronizing the various separate movements.
  • the cradle 20, 21 has again been swung forwards, so as to rotate a timber-block 30 from which a number of planks and boards have already been sawn. Subsequent to achieving the desired position of rotation, the cradle is permitted to return so that the timber block will be placed on the support beams of the carriage, where the block can again be clamped. Because of the spocket wheels 27 mounted on the common axel 26, the mutual movement directions of the chains 8, 9 will always be correct, irrespective of the direction in which a log or block is rotated.
  • Figure 6 illustrates schematically the position adopted by the log-holding tower 6 in relation to the timber rotators when sawing the last part of a block 31.
  • the Figure illustrates particularly that the cradle 20, 21 can again be swung forwards and upwards at the end of a sawing operation, so as to assist in ejecting the residual block 31 from the support beams 5.
  • Figures 7-9 illustrate a modified embodiment in which the substantially horizontally leg 20 of the cradle has been extended with a short, upwardly pivotal arm 33 provided with a spiked chain 32. This enables one and the same equipment to be used readily for sawing logs of mutually different dimensions.
  • Figure 7 illustrates the receipt and rotation of a log of very large diameter, wherewith the arm 33 is held in line with the horizontal leg 20 of the cradle.
  • the log-receiving cradle may be provided with workpiece-rotating devices other than spiked chains. Pivotal movement of the cradle can also be achieved in a manner other than with the aid of the illustrated pneumatic piston-cylinder device.
  • the number of timber rotators provided on a log carriage can also be any desired number.
  • An inventive timber rotator can also be used in other contexts where a corresponding function is desired.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Specific Conveyance Elements (AREA)

Claims (10)

  1. Holzblockdrehvorrichtung, die für einen Stammtransportwagen (1) vorgesehen ist, der im Betrieb Holzblockwerkstücke durch eine Sägemühle führt, wobei die Holzblockdrehvorrichtung zwei Arme (20, 21) aufweist, die mit einer Einrichtung zum Drehen eines Holzblockwerkstückes (20, 30, 31) versehen ist, und die gemeinsam verbunden sind, um einen Winkel miteinander derart zu bilden, daß ein Werkstück aufgenommen und getragen werden kann und, falls notwendig, das Werkstück um einen gegebenen Winkel gedreht werden kann,
    dadurch gekennzeichnet,
    daß die Arme bei einem gegebenen Winkel relativ zueinander derart fixiert sind, daß sie ein im wesentlichen L-förmiges Gestell zum Aufnehmen eines Werkstückes (29, 30, 31) bilden; dadurch, daß das Gestell schwenkbar an einem oberen Ende des im wesentlichen vertikal ausgerichteten Schenkels (21) aufgehängt ist; und dadurch, daß eine Vorrichtung (23) zum Schwenken des Gestells um den Aufhängepunkt (22) in Verbindung mit einem Aufnehmen, Drehen oder Ablegen eines Werkstückes vorgesehen ist.
  2. Holzblockdrehvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Gestellschenkel (20, 21) im wesentlichen rechte Winkel miteinander bilden.
  3. Holzblockdrehvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Holzblockdrehvorrichtung auf dem Stammtransportwagen (1) montiert ist, um so auf beiden Seiten durch einen Stammhalter (6) umfaßt zu werden, der mit einer im wesentlichen vertikalen Bezugsfläche (10) versehen ist, wobei die Stammhalter in einer Richtung quer zu der Vorwärtsrichtung des Stammgestells verschiebbar sind, und mit einer zugeordneten im wesentlichen horizontalen Stützfläche (5) auf dem Stammtransportwagen versehen ist.
  4. Holzblockdrehvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß in der Ruheposition des Gestells die im wesentlichen horizontalen (20) und im wesentlichen vertikalen (21) Schenkel des Gestells jeweils leicht unter und hinter den Stützflächen (5) auf dem Stammtransportwagen (1) bzw. den Bezugsflächen (10) auf den Stammhaltern (6) angeordnet sind.
  5. Holzblockdrehvorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Gestell (20, 21) dafür vorgesehen ist, nach vorn und nach oben geschwenkt zu werden, wenn ein Holzblockwerkstück (29, 30, 31) aufgenommen und möglicherweise gedreht wird, so daß das durch das Gestell getragene Werkstück frei von den Stütz- und Bezugsflächen (5, 10) auf dem Stammtransportwagen (1) bzw. den Stammhaltern (6) läuft.
  6. Holzblockdrehvorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Gestell (20, 21) vorgesehen ist, mit Hilfe einer Kolben-Zylinder-Vorrichtung (23) geschwenkt zu werden, die zwischen dem Stammtransportwagen (1) und dem im wesentlichen horizontalen Schenkel (20) des Gestells wirkt.
  7. Holzblockdrehvorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Gestellschenkel (20, 21) beide mit synchron angetriebenen mit Spitzen versehenen Ketten (8, 9) oder entsprechenden Vorrichtungen versehen sind.
  8. Holzblockdrehvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die mit Spitzen versehene Kette (9) des im wesentlichen vertikalen Schenkels (21) durch ein Antriebsrad angetrieben wird, das drehbar um die Schwenkachse (22) ist; und dadurch, daß der andere Schenkel (20) mit zwei zueinander parallelen mit Spitzen versehenen Ketten (8) versehen ist, die durch die zuerst erwähnte mit Spitzen versehene Kette (9) über Antriebsräder (27) angetrieben wird, die in dem Verbindungspunkt der Gestellschenkel (20, 21) angeordnet sind.
  9. Holzblockdrehvorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß ein noch oben schwenkbarer Arm (33), der mit mindestens einer mit Spitzen versehenen Kette (32) oder einer entsprechenden Vorrichtung versehen ist, an dem äußeren Ende des im wesentlichen horizontalen Schenkels (20) des Gestells vorgesehen ist.
  10. Holzblockdrehvorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß der Arm mit Hilfe einer Kolben-Zylinder-Vorrichtung (35, 36) manövriert wird, die zwischen dem Arm und dem im wesentlichen horizontalen Schenkel (20) des Transportwagens wirkt.
EP19900850160 1990-04-26 1990-04-26 Holzklotzwendevorrichtung Expired - Lifetime EP0453699B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19900850160 EP0453699B1 (de) 1990-04-26 1990-04-26 Holzklotzwendevorrichtung
DE1990610190 DE69010190T2 (de) 1990-04-26 1990-04-26 Holzklotzwendevorrichtung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19900850160 EP0453699B1 (de) 1990-04-26 1990-04-26 Holzklotzwendevorrichtung

Publications (2)

Publication Number Publication Date
EP0453699A1 EP0453699A1 (de) 1991-10-30
EP0453699B1 true EP0453699B1 (de) 1994-06-22

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ID=8206050

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900850160 Expired - Lifetime EP0453699B1 (de) 1990-04-26 1990-04-26 Holzklotzwendevorrichtung

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EP (1) EP0453699B1 (de)
DE (1) DE69010190T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9100642D0 (sv) * 1991-03-05 1991-03-05 Oswald Roennberg Anordning vid saagar
DE102004052130B3 (de) * 2004-10-27 2006-01-19 Wassmer, Paul Sägevorrichtung mit Auflagefläche für Baumstämme und mit einer quer zu dieser an einer Führung verstellbaren Anschlagkonsole
DE102008027107A1 (de) * 2008-06-06 2009-12-10 Zenz Landtechnik Gmbh Stammdreher
GB2491830B (en) * 2011-06-13 2016-01-27 Surridge Willow Ltd A log handling machine
CN116210797B (zh) * 2023-04-12 2023-11-03 浙江汉珏精密机械有限公司 一种自动化方糕生产设备以及多种馅料方糕的生产方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1060252A (fr) * 1952-07-15 1954-03-31 Mécanisme automatique pour la manoeuvre et la mise en place des grumes sur les chariots de scies
US2950742A (en) * 1959-05-11 1960-08-30 Claude O Weikel Lever and endless chain log turner for saw mill carriages
DE1209272B (de) * 1960-11-30 1966-01-20 Elmar Schulte Dr Ing Vorrichtung am Blockwagen einer ortsfesten Saege zum UEbernehmen und zum Ausrichten eines einzuschneidenden Stammes
FR1434149A (fr) * 1964-10-15 1966-04-08 Andre Vigneau Ets Tournebille incorporé à un chariot de sciage
AT275129B (de) * 1967-09-06 1969-10-10 Adolf Sandbichler Block- und Prismen-Wendevorrichtung für Sägewerke
DE7624112U1 (de) * 1976-07-31 1976-11-25 Canali, Gerhard, 6720 Speyer Vorrichtung zum drehen von baumstaemmen auf einem blockwagen

Also Published As

Publication number Publication date
EP0453699A1 (de) 1991-10-30
DE69010190D1 (de) 1994-07-28
DE69010190T2 (de) 1994-10-06

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