EP0481164A1 - Anlage zum Ablängen von Rundholz - Google Patents

Anlage zum Ablängen von Rundholz Download PDF

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Publication number
EP0481164A1
EP0481164A1 EP91110310A EP91110310A EP0481164A1 EP 0481164 A1 EP0481164 A1 EP 0481164A1 EP 91110310 A EP91110310 A EP 91110310A EP 91110310 A EP91110310 A EP 91110310A EP 0481164 A1 EP0481164 A1 EP 0481164A1
Authority
EP
European Patent Office
Prior art keywords
logs
pull
out device
conveyor
cut
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.)
Ceased
Application number
EP91110310A
Other languages
German (de)
English (en)
French (fr)
Inventor
Eduard Dipl.-Ing. Righi
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.)
MSG MASCHINEN-SERVICE GMBH
Original Assignee
Salzgitter Maschinenbau GmbH
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 Salzgitter Maschinenbau GmbH filed Critical Salzgitter Maschinenbau GmbH
Publication of EP0481164A1 publication Critical patent/EP0481164A1/de
Ceased 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
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/08—Discharging equipment
    • 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
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature

Definitions

  • the invention relates to a system for cutting logs, in particular crooked timber, with a cross-cut saw, in which a feed device is provided, with which the logs are moved in the longitudinal direction to the cross-cut saw into the correct position and clamped therein, and a pull-out device into which the end of the logs to be cut off is guided and which is adjustable to adapt to curvatures of the logs.
  • the pull-out device can only be adjusted laterally, so that these systems are only suitable for logs which are only curved in one plane. If there are logs that are curved in all possible directions, they must be rotated so that the parts of the logs to be located in the two clamping devices lie in a horizontal plane when they are inserted into these cross-cutting devices. These measures take time, reduce the throughput capacity of the plant and require labor.
  • the object of the invention is to provide a system for cutting logs to length, which can also process logs curved in all directions, without the need for special manual interventions or control processes.
  • the pull-out device is arranged in gimbal frames, which in turn are mounted such that they can be moved vertically or laterally, so that the pull-out device automatically adapts to any curvature of the logs, and that all possible movements of this mounting can be determined, so that the part to be cut off the logs can be clamped in the respective position relative to the part of the logs clamped in the feed device.
  • the pull-out device automatically adjusts itself to the required position and, when all the possible movements of the gimbal suspension that supports it have been determined, holds the end of the log that is to be cut to length in its position, so that the saw cut takes place when the log is de-energized.
  • the pull-in device and preferably also the pull-out device consists of a fixed and one or two relatively short conveyor belts or chains that can be adjusted with respect to this.
  • the conveyor belts or chains must not be too long, because otherwise they cannot clamp curved trunk parts sufficiently tight, but of course not too short either.
  • the term "fixed" refers to the inner gimbal in which the pull-out device is arranged.
  • the conveying dreams of the conveyor belts or chains preferably run parallel to one another, but can be guided in a converging manner in the input part.
  • the inner gimbal is rotatably mounted in the outer gimbal in the usual way about an axis, but is additionally displaceable in the direction of the axis, and the outer gimbal in a machine frame can be rotated in the usual way about an axis running transversely to said axis, but additionally in the direction this second axis slidably mounted.
  • the pull-out device After loosening the adjustable conveyor belts of the pull-out device, ejecting the cut part of a wooden trunk and removing the fixing of the gimbal frame carrying the pull-out device, the pull-out device automatically returns to the basic position, so that the wooden trunk quickly and smoothly after each cutting operation from the pull-in device the pull-out device can be inserted as soon as the chop saw has cleared the way to it.
  • the pull-out device is driven synchronously with the pull-in device when the logs are inserted.
  • This drive is designed so that the pull-out device works after the stop required for the cutting process and immediately after the end of the cutting process at increased speed, so that the cut parts of the logs have left the pull-out device during the return movement and until the chop saw has reached the rest position and the extraction device has returned to its basic position after the determination has been canceled.
  • the pull-out device is switched back to the synchronous drive with the pull-in device. In this way The shortest possible time expenditure is achieved for each cutting process.
  • a laterally open, upright support frame is provided, which is arranged displaceably on a foundation and has a lower and an upper arm, each adjustable in height, on vertical guides.
  • the arms carry holding frames which can be rotated or pivoted about vertical pins, in each of which at least one roller, belt or chain conveyor is arranged, the conveyors being pivotable from their horizontal basic position into an inclined position.
  • the pull-out device designed in this way can also adapt to any curvature of the logs to be cut to length.
  • the holding frames can also be arranged displaceably towards and away from the support frame. This displaceability of the holding frame can replace or supplement the displaceability of the supporting frame on the foundation.
  • roller, belt or chain conveyors have working strands that are designed to converge in cross-section, a second upper conveyor can be dispensed with.
  • the feed device can also be equipped with only two conveyor belts, it being advantageous to effect the lateral guidance of the logs to be cut to length by means of two vertically adjustable rollers arranged in front of the feed device.
  • the vertical pins, with which the holding frame of the conveyor is pivotally connected to the arms should be provided on the end of the conveyor facing the feeder device, the conveyor being pivoted automatically by contact with the logs or by forced pneumatic control or hydraulic cylinder-piston units or by means of rotary angle drives that act on the pins.
  • the conveyors have the transverse and horizontal pivot axis required to achieve their inclined position in their holding frame at the end facing the feed device.
  • This pivot axis can be identical to the shaft of the front deflection roller of each conveyor.
  • the conveyors are then connected at the other end facing away from the drawing-in device to pneumatic or hydraulic cylinder-piston units with which they can be determined in inclination to a given inclined position of the logs to be cut.
  • the support frame is slidably arranged on rails of the foundation transversely to the direction of conveyance of the logs, and the displacement is carried out by controlled, pneumatically or hydraulically moved cylinder-piston units.
  • the shifting of the holding frame receiving the conveyor on the arms is also carried out by hydraulic or preferably by pneumatic cylinder-piston units, in the latter case two cylinders being provided for better adjustment.
  • pneumatic cylinder-piston units in the latter case two cylinders being provided for better adjustment.
  • the system consists of a pull-in device 1 and a pull-out device 2.
  • a chop saw 3 is provided which can be swiveled in the direction of arrow a into the area between the devices if a log 4 held by the two devices is to be sawed through.
  • the feed device 1 consists of a lower conveyor belt 5 on which the to be capped Log rests, and two upper conveyor belts 6, which lie obliquely on both sides laterally from above against the log and are provided with pressing devices, not shown. To facilitate the introduction of the logs, the conveyor belts 5 and 6 are funnel-shaped at the front end.
  • the pull-out device 2 also consists of a lower conveyor belt 7 and two upper conveyor belts 8, which run parallel to one another over their entire length.
  • the conveyor belts together with pressing devices 22 and drives, not shown, are arranged in the inner frame 9 of a gimbal, which is rotatably supported by a horizontal axis 10 in the outer frame 11 of the gimbal, which in turn is rotatably supported by a vertical axis 12 in a fixed position arranged machine frame 13.
  • the two frames 9, 11 are also axially displaceably mounted with their axes 10 and 12 in the frame 11 and in the machine frame 13, respectively, against the action of resilient members 18, 19, which they try to keep in their basic position. in which the pull-out device 2 is aligned with the pull-in device 1.
  • pneumatically or hydraulically controllable cylinder-piston units 20, 21 are provided, with which the frames can be fixed in any displacement position.
  • the resilient members 14, 15, 18, 19 can be combined with the use of gas accumulators in the hydraulic systems with the hydraulic cylinder-piston units which serve to fix the frame, if preference is given to the hydraulic units.
  • the cylinder-piston units can be designed in such a way that resilient members are also provided in connection with a pressure control.
  • the conveyor belts 5, 6, 7, 8 are driven during operation in such a way that initially all conveyor belts run synchronously when a log 4 is introduced.
  • the pull-out device When the end of a curved log to be cut is inserted, the pull-out device is in its basic position in which it is aligned with the pull-in device. Thanks to its cardanic bearing, it is automatically pivoted into a corresponding inclined position, contrary to the action of the resilient members 14, 15, 18, 19, regardless of the direction in which the curvature of the wooden trunk runs, while that in the pneumatic or hydraulic cylinder-piston units 16, 17, 20, 21 provided for the corresponding movements without hindrance, because the valves provided in the lines leading to the cylinders, not shown, are open.
  • the conveyor belts 7, 8 of the pull-out device 2 are driven immediately after the separation of the part located in the pull-out device with increased speed, and the parts of the pull-out device move after loosening the pneumatic or hydraulic locking devices 16, 17, 20, 21 under the action of the resilient members 14, 15, 18, 19 or by applying appropriate pressure back to the basic position. In this way, the greatest possible throughput in the plant is achieved.
  • FIGS. 3 and 4 also has, as shown in FIG. 3, a feed device 1 which consists of a lower, fixed one Conveyor belt 5, an upper conveyor belt 6 adjustable in the directions of the double arrow c and two guide rollers 41 arranged vertically with their axes.
  • a feed device 1 which consists of a lower, fixed one Conveyor belt 5, an upper conveyor belt 6 adjustable in the directions of the double arrow c and two guide rollers 41 arranged vertically with their axes.
  • the direction of feed for the logs to be inserted is indicated by arrows d.
  • the pull-out device 2 has a supporting frame 23 which receives all the parts essential for the gimbal mounting of the conveyor, which is provided with a foot 24 and has guides 37 which slide on rails 38 of a foundation 25. With the help of a cylinder-piston unit 39, the support frame is arranged on the foundation in the directions of the double arrow e. Rails 23 'are provided on the support frame 23 in a vertical extension and are slidably gripped by guides 26 of a lower arm 27 and an upper arm 28.
  • each arm carries a roller, chain or belt conveyor 7 or 8, wherein the conveyors are arranged in holding frames 29 and these are provided with vertically extending pins 34 around which they and thus the conveyors in horizontal plane can be pivoted according to the double arrow f.
  • Cylinder-piston units 40 are provided as swivel drives, or rotary angle drives (not shown) in a known design are suitable for this purpose.
  • the lower holding frame 29 can also be displaceable by means of a double cylinder-piston unit in the directions of the double arrow g towards and away from the support frame, the pin 34 sliding in an elongated hole or being guided in some other way becomes.
  • the upper holding frame 29 can also be displaceable on the upper arm 28 in accordance with the double arrow g.
  • the conveyors 7, 8 are also adjustable in their inclination about horizontal transverse axes.
  • axes can be identical to the shafts 35 of the front conveyor belt deflection rollers.
  • a cylinder-piston unit 36 is provided between the holding frame and the conveyor, with which the inclination of each conveyor can be adjusted in accordance with the double arrows h in FIG. 3.
  • the arrows i symbolize the adjustment direction of the arms towards and away from each other.
  • the arms are connected to one another by means of a preferably pneumatic cylinder-piston unit 31 which, depending on a controlled pressure in the system, holds the upper conveyor 8 at a certain distance from the lower conveyor 7.
  • a further cylinder-piston unit 33 is provided between the arms 27 and 28, with which the two arms are moved to one another to fix the respective log.
  • a weight compensation device 32 is provided, which can also be designed as a pneumatically operating cylinder-piston unit, and which is supported on the top of the machine frame 23 and keeps connection to the lower arm 27 by means of a rope or a piston rod 32 '.
  • the cylinder-piston units 30, 31, 33, 36 and 39 and the counterbalance cylinder 32 take over the functions of the cylinder-piston units 16, 17, 20, 21 and the resilient members 14, 15, 18, 19 in this embodiment 1 and 2. This means that this pull-out device can also be brought into alignment with the pull-in device, and it is thereby brought about that the conveyor belts adapt to any curvature of a log and cut it together with the pull-in device 1 for cutting with the chop saw 3 set stress-free.
  • the cylinder-piston units 30, 33, 36 and 39 are depressurized, in order to enable automatic adjustment to the log or its curvatures.
  • the cylinder-piston units 31 and 32 which serve to balance the weight, are so far under pressure that the pull-out device is in alignment with the pull-in device.
  • the cylinder-piston units 30, 33, 36 and 39 are put under pressure until all parts of the pull-out device, essentially the conveyors 7, 8, have adapted to the curvatures of the log.
  • their piston rods are provided with electromagnetic braking devices, not shown, which now secure the clamping position of the log to be cut.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Specific Conveyance Elements (AREA)
EP91110310A 1990-10-18 1991-06-22 Anlage zum Ablängen von Rundholz Ceased EP0481164A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4033055 1990-10-18
DE19904033055 DE4033055C1 (enrdf_load_stackoverflow) 1990-10-18 1990-10-18

Publications (1)

Publication Number Publication Date
EP0481164A1 true EP0481164A1 (de) 1992-04-22

Family

ID=6416531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91110310A Ceased EP0481164A1 (de) 1990-10-18 1991-06-22 Anlage zum Ablängen von Rundholz

Country Status (2)

Country Link
EP (1) EP0481164A1 (enrdf_load_stackoverflow)
DE (1) DE4033055C1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6419080B1 (en) 2000-11-09 2002-07-16 Linden Fabricating & Engineering (Prince George) Ltd. Spiral singulator
US6543606B2 (en) 2001-02-01 2003-04-08 Linden Fabricating & Engineering (Prince George) Ltd. Spiral singulator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547193C2 (de) * 1995-12-16 1999-01-28 Linck Masch Gatterlinck Verfahren und Vorrichtung zum Einschneiden eines Baumstammes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012060B (de) * 1953-04-15 1957-07-11 Werner Herrmann Rundholzschaelmaschine
US3392764A (en) * 1965-10-21 1968-07-16 Univ Michigan Tech Bark stripping apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE43060C (de) * A. e. tidblad in Stockholm, Schweden Führung krummer Blöcke bei Sägegattern
DE266672C (enrdf_load_stackoverflow) *
DE8408807U1 (de) * 1984-03-22 1984-05-17 Josef Schilcher Maschinenbau und Landmaschinenhandel, 9833 Rangersdorf Vorrichtung zum Ablängen von Holz

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1012060B (de) * 1953-04-15 1957-07-11 Werner Herrmann Rundholzschaelmaschine
US3392764A (en) * 1965-10-21 1968-07-16 Univ Michigan Tech Bark stripping apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8122, 8. Juli 1981 Derwent Publications Ltd., London, GB; Class Q35, AN 81-F0234D/22 & SU-A-761 388 (VOLGA-KAMA TIMBER) 29. November 1978 *
SOVIET INVENTIONS ILLUSTRATED Section PQ, Week 8640, 16. Oktober 1986 Derwent Publications Ltd., London, GB; Class P63, AN 86-263399/40 & SU-A-1 211 035 (SOYUZDREVSTANKOPROM) 31. Juli 1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6419080B1 (en) 2000-11-09 2002-07-16 Linden Fabricating & Engineering (Prince George) Ltd. Spiral singulator
US6543606B2 (en) 2001-02-01 2003-04-08 Linden Fabricating & Engineering (Prince George) Ltd. Spiral singulator

Also Published As

Publication number Publication date
DE4033055C1 (enrdf_load_stackoverflow) 1991-07-18

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