EP0076241B1 - Holzvorschubvorrichtung für Säge - Google Patents

Holzvorschubvorrichtung für Säge Download PDF

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Publication number
EP0076241B1
EP0076241B1 EP82850101A EP82850101A EP0076241B1 EP 0076241 B1 EP0076241 B1 EP 0076241B1 EP 82850101 A EP82850101 A EP 82850101A EP 82850101 A EP82850101 A EP 82850101A EP 0076241 B1 EP0076241 B1 EP 0076241B1
Authority
EP
European Patent Office
Prior art keywords
feed rollers
log
roller
sawing
towards
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
Application number
EP82850101A
Other languages
English (en)
French (fr)
Other versions
EP0076241A1 (de
Inventor
Torgny Lundin
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.)
Waco Jonsereds AB
Original Assignee
Waco Jonsereds 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 Waco Jonsereds AB filed Critical Waco Jonsereds AB
Priority to AT82850101T priority Critical patent/ATE18149T1/de
Publication of EP0076241A1 publication Critical patent/EP0076241A1/de
Application granted granted Critical
Publication of EP0076241B1 publication Critical patent/EP0076241B1/de
Expired 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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers

Definitions

  • the present invention refers to an arrangement in a resaw feeding device comprising two roller boxes located opposite each other and which are displaceably mounted towards and away from each other in the frame of the feeding device and each supporting a number of, preferably three, feed rollers intended to bear against opposite sides of a log for feeding it towards a sawing member.
  • a nondriven log feeding device comprising a roller box, with one set of fixed pivoted rollers and one set of resiliently pivoted rollers, and a conveyor box consisting of an endless feeder band.
  • the object of the invention is to provide a device solving the above mentioned problems and which in one position provides a separate and possibly progressive resilience of the feed rollers and which in another position provides locking of the feed rollers, which is desired for example when the log is eccentricely sawed, when the feed rollers of one side should form a stop.
  • Another object is to provide a device which enables a simple and quick switching over from centric to eccentric sawing and which at both these sawing methods guarantees that the sawing is performed in the intended longitudinal plane of the log.
  • a locking device is arranged in each roller box for locking the pivotal movement of the feed rollers.
  • the feeding device shown in Fig. 1 is arranged in front of the saw blade 10 to a band saw or circular saw not further shown in the drawings.
  • Two roller boxes 12 which each supports for example three feed rollers 13, 14 and 15 are mounted in the frame 11 of the feeding device on both sides of the vertical center plane of the saw blade 10, said roller boxes being displaceable towards and away from each other.
  • the roller boxes 12 are individually adjustable towards and away from the vertical center plane of the saw blade means of a screw spindel 16 each.
  • roller boxes 12 are adjusted for centric sawing of a log denoted with the numeral 17, said log forwarded towards the saw blade 10 of the feed rollers 13,14 and 15, which in pairs bear against opposite side of the log.
  • the feed rollers 13, 14 and 15 are individually resiliently pivoted about an axle 18, 19 and 20 each.
  • Each of the rotation axle 7-9 of the feed rollers are mounted in a lever 24, which is pivoted about the respective axle 18, 19 and 20. From each lever 24 a side arm projects, which acts upon a pneumatic pressure cell 21 each, which in the embodiment shown provides the resilient element which determines the bearing pressure.
  • the roller boxes 12 are fixed during operation and it is only the feed rollers which moves relative to the irregularities of the log.
  • the feed rollers all the time have contact with the log.
  • the feed rollers are by way of a cog wheel transmission 33 driven by a hydraulic motor 22.
  • the cog wheel transmission 33 arranged in the upper part of the roller box 12 is shown in Fig. 4.
  • the driving wheel of the hydraulic motor 22 is denoted with the numeral 23.
  • the locking device comprises a bar 27 rotatably mounted in the lower part of the roller box 12, said bar extending in the longitudinal direction of the roller box.
  • the bar 27 is rotated by means of a pneumatic or hydraulic cylinder 28 rotatably attached to the roller box 12 and the piston rod 29 of which acts upon a bracket 30.
  • a locking arm 31 From the lever 24 of each feed roller 13, 14 and 15 a locking arm 31 projects which is locked in a recess in the bar 27 when this is folded down. In this way the resilience of all the feed rollers of one side are simultaneously locked.
  • the bar 27 is in its upper position as is shown in Fig. 5 the feed rollers are freely resilient.
  • Adjusting screws 32 are arranged at the locking arms 31 for adjusting these and by that the feed rollers in the desired position.
  • Locking devices can be arranged in both the right and the left roller box or only in one.
  • the switching over of the locking device between inactive and active position is preferably remote controlled.
  • the feed roller pair 15 located nearest to the saw blade 10 is interconnectable by means of a hydraulic operated centering device 26, in order to provide a symmetric movement of these two rollers at centric sawing of the log 17.
  • Each of the feed rollers 15 located nearest the saw blade 10 is rotatable about an axle 9 according to Fig. 6, which is supported by the one arm 34 of a two armed lever 35, which by means of an axle 36 is rotatably mounted in the roller box 12.
  • Two rods 37 are each with one end fixed to an attachment means 38, which is rotatably mounted at the free end of the opposite arm 40 of the lever 35 about an axle 39. Both rods 37 are passed through a locking sleeve 41 each, said sleeves being rotatably mounted at opposite ends of a two armed coupling bar 42, which is pivoted about an axle 43 in a bracket 44 fixed in the frame of the feeding device.
  • the coupling bar 42 is composed by an upper portion 42a and a lower portion 42b, which at the ends are connected by means of plates 47 and between which are both locking sleeves 41 are mounted by means of upper and lower shaft pivot 48 and 49 respectively.
  • the locking sleeve 41 is on its inside provided with a cylinder shaped reset 50, which is sealingly closed by a comparatively thin-walled inner sleeve 52, which is connected to the sleeve by means of weld joints 51.
  • the ring shaped room formed by the recess 50 communicates with a passage 53 through the pivot shaft 59 and which is connected to a feed conduit for pressure medium 53.
  • the different parts are so dimensioned that the rod 37 is freely displaceable in the sleeve in its longitudinal direction as long as the ring shaped space 50 is not under pressure, while a supply of pressure medium to the space 50 results in that the inner sleeve 52 is curved inwards so that it is pressed against and locked to the rod 37.
  • both sleeves 41 are locked to the respective rod 37 a movement of one of the rollers 15 towards or away from the log 17 will be transferred to a corresponding movement of the opposite feed roller by means of the above described device.
  • the rod is freely displaceable in the sleeve and does not actuate the coupling bar 42. Releasement of both locking sleeves 41 from the rods 37 enables adjustment of the roller boxes towards or away from the sawing plane, at which the coupling bar 42 by means of the spring 45 is kept in the position shown in Fig. 6 for providing a correct initial position of the lever, when the sleeves are relocked to the rods.
  • Each of the levers 35 supporting the feed rollers 15 is provided with a side arm 25, which is actuated by the pneumatic pressure cell 21 which is mounted in the frame and which keeps the roller 15 resiliently bearing against the log.
  • the device functions and is used in the following way.
  • each pressure cell 21 of each feed roller is preferably adjustable by means of a pressure regulator which is not shown.
  • the adjusted pressure should be read on a pressure gauge.
  • the last feed roller pair 15 with its centre is located just opposite the teeth of the saw blade 10, at which is guaranteed that every single log 15 guided during the whole sawing operation and "tailing" is avoided, i.e. that the last phase of the sawing is not correct in size.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
  • Feeding Of Workpieces (AREA)

Claims (7)

1. Anordnung für eine Sägewerkzuführvorrichtung, welche Anordnung zwei Rollenkasten (12), die einander gegenüberliegend und relativ zueinander beweglich in dem Rahmen (11) der Zuführvorrichtung monteirt sind, die jeweils eine Anzahl, vorzugsweise drei separate, drehbare Zuführrollen (13, 14, 15) aufweisen und die an die gegenüberliegenden Seiten eines Klotzes anlegbar sind, um diesen einem Sägewerkzeug (10) zuzuführen, wobei jede Zuführrolle (13,14,15) bezüglich des jeweiligen Rollenkastens (12) um eine Achse (18, 19, 20) federnd angelenkt ist, dadurch gekennzeichnet, dass eine Sperrvorrichtung (28, 28, 31) vorgesehen ist, um die Winkeleinstellung der Zuführrollen zu verriegeln, dass die Zuführrollen in der verschwenkten und unverschwenkten Stellung angetrieben werden können und dass die dem Sägewerkzeug (10) am nächsten liegenden Zuführrollen (15) durch ein Lagerteil (34) gehalten sind, das zum Klotz (17) hin und von diesem weg beweglich ist, wobei die Lagerteile durch eine Bewegungsübertragungseinrichtung (37-42) so miteinander verbunden sind, dass eine Bewegung einer der Zuführrollen (15) zum Klotz hin oder von diesem weg eine entsprechende Bewegung der gegenüberliegenden Zuführrolle (15) zur Folge hat, und dass die Bwegungsübertragungseinrichtung eine lösbare Verbindung (37, 41) mit dem Lagerteil (34) von mindestens einer Zuführrolle (15) aufweist.
2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Sperrvorrichtung (27, 28, 31) ausgebildet ist, gleichzeitig alle Zuführrollen (13, 14, 15) eines Rollenkastens (11) zu verriegeln.
3. Anordnung nach Anspruch 2, dadurch gekennzeichnet, dass die Sperrvorrichtung eine Stange (27) aufweist, die drehbar im Rollenkasten (12) montiert ist, wobei die Stange sich in Längsrichtung des Rollenkastens erstreckt und mittels eines Antriebsgleides (28) aus einer Ruhestellung in eine Verriegelungsstellung drehbar ist, in der diese Sperrhebel (31) erfasst, die vom Lagerteil (29) der Zuführrollen (13, 14, 15) abstehen.
4. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass jeder Lagerteil einen Arm (34) eines zweiarmigen Hebels (35) umfasst, wobei der andere Arm des Hebels mittels Verbindungsglieder an gegenüberliegende Enden einer Kupplungsstange (42) lösbar gekoppelt ist, die um eine am Rahmen der Zuführvorrichtung befestigte Achse (43) geschwenkt ist.
5. Anordnung nach Anspruch 4, dadurch gekennzeichnet, dass jedes Verbindungsglied (37, 38) einen Stab (37) umfasst, der von einer Hülse (41) umschlossen ist, die im entsprechenden Ende der Kupplungsstangen (42) drehbar montiert ist, wobei die Hülse fest oder verschiebbar in der Stange angeordnet ist.
6. Anordnung nach Anspruch 5, dadurch gekennzeichnet, dass die Hülse (41) doppelwandig ist, wobei der Raum (50) zwischen den Wänden an eine unter Druck stehendes Medium aufweisende Quelle angeschlossen ist, so dass die Hülse auf dem Stab (37) durch Zufuhr von unter Druck stehendem Medium in den Raum und folglich Andrücken der inneren Wand (52) gegen den Stab verriegelt werden kann.
7. Anordnung nach einem der Ansprüche 4-6, dadurch gekennzeichnet, dass die Kupplungsstange (42) in der Richtung, ausgehend von den Zuführrollen, zum Klotz hin vorgespannt ist.
EP82850101A 1981-05-27 1982-05-06 Holzvorschubvorrichtung für Säge Expired EP0076241B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82850101T ATE18149T1 (de) 1981-05-27 1982-05-06 Holzvorschubvorrichtung fuer saege.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8103344A SE426366B (sv) 1981-05-27 1981-05-27 Anordning vid matarverk for klyvsagar
SE8103344 1981-05-27

Publications (2)

Publication Number Publication Date
EP0076241A1 EP0076241A1 (de) 1983-04-06
EP0076241B1 true EP0076241B1 (de) 1986-02-26

Family

ID=20343936

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82850101A Expired EP0076241B1 (de) 1981-05-27 1982-05-06 Holzvorschubvorrichtung für Säge

Country Status (4)

Country Link
EP (1) EP0076241B1 (de)
AT (1) ATE18149T1 (de)
DE (1) DE3269314D1 (de)
SE (1) SE426366B (de)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR962647A (de) * 1950-06-16
DE185239C (de) * 1904-10-25
DE1079822B (de) * 1956-08-16 1960-04-14 Reich Maschf Gmbh Karl Vorschubvorrichtung fuer Holzbearbeitungsmaschinen
US3259020A (en) * 1964-07-20 1966-07-05 Cincinnati Milling Machine Co Machine tool quill clamping mechanism
FR1523190A (fr) * 1966-12-14 1968-05-03 Guilliet Ets Système d'entraînement du bois pour scie à ruban à usages multiples
CA872598A (en) * 1970-03-13 1971-06-08 Zehavi Samuel Tree feed roll assembly
JPS5029979B2 (de) * 1972-10-31 1975-09-27
US3866640A (en) * 1972-12-26 1975-02-18 Marplex Products Co Inc Log feeding device
SE420579B (sv) * 1976-02-16 1981-10-19 Skogsegarnas Vaenerind Anordning for sagning av krokformat timmer

Also Published As

Publication number Publication date
ATE18149T1 (de) 1986-03-15
SE8103344L (sv) 1982-11-28
DE3269314D1 (en) 1986-04-03
EP0076241A1 (de) 1983-04-06
SE426366B (sv) 1983-01-17

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