EP0190665A1 - Machine for working veneer sheets - Google Patents

Machine for working veneer sheets Download PDF

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Publication number
EP0190665A1
EP0190665A1 EP19860101201 EP86101201A EP0190665A1 EP 0190665 A1 EP0190665 A1 EP 0190665A1 EP 19860101201 EP19860101201 EP 19860101201 EP 86101201 A EP86101201 A EP 86101201A EP 0190665 A1 EP0190665 A1 EP 0190665A1
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EP
European Patent Office
Prior art keywords
conveyor
roller
machine according
machine
support roller
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.)
Granted
Application number
EP19860101201
Other languages
German (de)
French (fr)
Other versions
EP0190665B1 (en
Inventor
Hans-Heinrich Kuper
Theo Grönebaum
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.)
Heinrich Kuper GmbH and Co KG
Original Assignee
Heinrich Kuper GmbH and Co KG
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Publication of EP0190665A1 publication Critical patent/EP0190665A1/en
Application granted granted Critical
Publication of EP0190665B1 publication Critical patent/EP0190665B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/08—Severing sheets or segments from veneer strips; Shearing devices therefor; Making veneer blanks, e.g. trimming to size
    • 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
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/541—Actuation of tool controlled in response to work-sensing means
    • Y10T83/543—Sensing means responsive to work indicium or irregularity
    • 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
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • 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
    • Y10T83/929—Tool or tool with support
    • Y10T83/9454—Reciprocable type

Definitions

  • the invention relates to a machine sum processing veneer sheets in succession, with a proper conveyor and support roller and a above the roller to and from this moving knife, and with a scanning device and having at least one conveyor belt before the conveyor and conveyor roller arranged conveyor for the veneer sheets.
  • veneer sheets can be successively conveyed into the knife area, checked there by the scanning device, and those veneer sheet sections that do not have the required thickness, for example, can be cut out.
  • These waste areas are scanned above the conveyor and support roller on which the veneer sheet is supported tangentially.
  • the use of the lateral surface of the conveyor and support roller as a "support table" for the veneer sheet area to be scanned has the disadvantage that the accuracy of the scanning leaves something to be desired because of the curved surface of the conveyor and support roller.
  • deviations of the outer surface of the feed and backup roller from the precisely circular cylindrical shape have an unfavorable effect on the accuracy of the scanning of the veneer elastic thickness. This deviation from the circular cylindrical shape is known as "blow".
  • the invention has for its object to develop the machine for processing veneer sheets so that a much more accurate detection of the thickness of the veneer sheets is possible.
  • the machine should also be able to check veneers by scanning, the thickness of which is only 0.5 mm.
  • the scanning device has several of the same, each mounted on pivotable parallel levers sensing roller: which are supported above a machine table of the conveyor on the veneer sheet passing through there. It is therefore used as a base for the continuous veneer sheets used with a flat horizontal table surface, on which the veneer sheet is supported on the conveyor belt, so that the base does not change at the location of the Abtaztrollen.
  • the base which is used during the conveying process mosands conveyor and support roller.
  • Each pivotable lever of a sensing roller is preferably designed as an angle lever, the pivot axis of which extends transversely to the conveying direction is arranged in the intersection line of its two legs and is mounted in a fixed lever bearing.
  • the need for this angle lever enables a translation of the lever deflection caused by changes in the thickness of the continuous veneer sheet. While the lower leg of the angle lever carrying the feeler roller is running course, the upper armature of the angle lever which has a request has a considerably longer length, so that the lever deflection appears enlarged at its free end.
  • the wetness of a thickness variation can be passed on, for example, via the safety device of an electrical microswitch.
  • the machine according to the invention is connected to an electrical control device which coordinates the activities of the individual devices. If only a single tracing roller is used to mold the veneer sheet over the angle lever, the switching causes that with a time delay of e.g. The conveying process is interrupted 1/10 second. The veneer sheet has then moved so far that it is located with the boundary line of its defective area on the conveyor and back-up roller, which now serves as an underlay for the cutting process, so that cutting takes place by moving the knife in the direction of the roller surface. Then the circuit restarts the conveying process.
  • the stations for cutting and for scanning are spatially separated, so that it is possible to carry out a very precise scanning of the thickness of the veneer sheets because of the changing surface of the machine table underneath the scanning rollers and then the conveyor and support roller to use their short standstill as a base for cutting the veneer sheet.
  • the machine according to the invention has a tangent machine table 11 on a machine, which is designed both as a conveyor for veneer sheets 12 and as part of a scanning device for the thickness of the continuous veneer sheets 12.
  • a cutting station connects to the machine table 11, which has a conveying and support roller 13 which is in the right angle and a knife 14 which can be displaced vertically above this roller and which is supported there on the outer surface when moving onto the conveying and support roller 13 Can completely cut veneer sheet 12 perpendicular to the conveying direction.
  • Conveyor consists of several identical conveyor belts 15 arranged parallel to one another at intervals, which are circumferentially arranged as endless belts on the machine table 11, sliding along a portion of their length above the machine table 11. These conveyor belts 15 are on several Waves excited.
  • a horizontal deflection shaft 16 opposite the conveying and supporting roller 13 is supported in a segment bearing shell 17, which is fastened to the machine table 11 at the outlet end of the conveying device. This mounting of the deflection shaft 16 ensures precise guidance of all conveyor belts in the region of the conveyor device adjacent to the conveyor and support roller 13, where a plurality of feeler rollers 18 control the thickness of the veneer sheets 12 passing through on the conveyor belt 15.
  • deflecting shafts 19, 20 and 21 are arranged at the inlet end of the conveying device, wherein, for example, the deflecting shaft 20 can be the drive shaft for the conveyor belts 15.
  • the deflecting shaft 20 can be the drive shaft for the conveyor belts 15.
  • a sliding plate 22 which promotes the sliding of the conveyor belts 15 is incorporated over most of the length.
  • the feeler rollers 18 provided for checking the thickness of the continuous veneer sheets 12 are each mounted on pivotable levers.
  • each conveyor belt 15 are two Taatollen 18 in the exemplary embodiment with horizontal, transverse to the conveying direction Achgzen mounted on the lower legs 23 of angle levers 24, each angle lever 24 having a substantially longer upstanding leg 25 compared to the lower leg 23.
  • each angle lever 24 is pivotally mounted about a horizontal pivot axis 26, which is also transverse to the conveying direction, like the axes of the feeler rollers 18, and is held in a test lever bearing 27.
  • the feeler roller 18 is rotatably supported at the free end of the lower leg 23 of the angle lever 24, it stands the free end of the upstanding leg 25 in contact with the actuator 28 of a microswitch 29 fixed to the machine.
  • the upstanding leg 25 is pulled towards the housing 31 and thus the feeler roller 18 on the lower leg 23 lies on the conveyor belt 15 and the machine table 11 Veneer sheet 12 pressed.
  • the bias of the coil spring can be changed with the aid of an adjusting screw 32, on which the coil spring is secured at its other end.
  • the veneer sheet 12 Before the veneer sheet 12 reaches the scanning area, it is pressed over a large part of its path with the aid of pressure rollers 33 onto the conveyor belts 15 and the machine table 11, so that it approaches the scanning area with the scanning rollers in a completely flat form.
  • six pressure rollers 33 are arranged one behind the other in the conveying direction above each conveyor belt 15, with all pressure rollers above a conveyor belt 15 being mounted in a downwardly open, cross-sectionally U-shaped roller holder 34.
  • the axes of the pressure rollers 33 run in the same way as the axes of the feeler rollers 18 and the axis of the conveying and supporting roller 13 transversely to the conveying direction.
  • a rack and pinion drive 35 arranged in the housing 31 serves to raise or lower the roll holder 34.
  • the pressing forces are applied by means of between the roll holder 34 and the rack and pinion drive 35 ordered coil springs 36 evenly distributed.
  • the relative displacement between the rack and pinion drive 35 and the roller holder 34 to a small extent enables guide bushes 37 with guide bolts 38.
  • the machine thus has a plurality of swiveling stop fingers 39 against which the incoming rectangular veneer sheets 12 strike with their front edge and are thereby aligned exactly at right angles to the conveying direction.
  • the machine is provided with hold-down devices 40 which can be swiveled up and which press the veneer sheet onto the conveying and support roller 13 in the vicinity of its interface.
  • the machine according to the invention works as follows.
  • A, for example, rectangular veneer sheet 12 is placed at the entry point on the machine table 11 and the conveyor belts 15 rotating there and sucked into the area of the pressure rollers 33.
  • the veneer sheet passes under the sensing rollers 18 of the scanning device. If the bend of the continuous veneer sheet swings within the desired limits, further transport takes place out of the machine via the conveyor and support roller 13.
  • the feeler roller 18 located there changes its distance from the surface of the machine table 11 as it passes through the damaged area or, for example, a hole in the veneer sheet.
  • the feeler roller 18 approaches the table to the extent necessary Thickness of the veneer sheet does not exist.
  • the angle lever 24 is pivoted about its pivot axis 26 such that the free end of the upstanding leg 25 executes a sufficiently large pivot path to actuate the microswitch 29 via the actuating member 28.
  • This pivoting path has been translated to a large value due to the much greater length of the upstanding leg 25 compared to the length of the lower leg 23.
  • a very slight change in the thickness of the veneer sheet, which scans the feeler roller 18, can thus have a sufficient deflection on the actuating member 28.
  • the actuation of the microswitch 29 now causes the sight of the machine to stop the entire conveying process after a short time. This time is such that the veneer sheet with the boundary line between the good, the desired thickness and the damaged area has reached its interface on the conveyor and support roller 13 below the knife 14 when the conveying process is switched off. Now the damaged area is cut out across the entire width of the veneer sheet by lowering the knife 14.
  • the circuit is set up in such a way that the knife 14 cuts a strip containing a defective spot out of the veneer sheet, that is to say it is moved down and up twice. between these two processes there is a promotion of the veneer sheet, which corresponds to the length of the damaged point in the conveying direction.
  • the strip with the damaged area can be removed by a special conveyor which adjoins the conveyor and support roller 13 in the conveying direction be sorted out so that the flawless veneer and the waste strips are conveyed separately.
  • the diameter of the deflection shaft 16 is substantially smaller than the diameter of the conveying and support roller 13. In this way it is possible to get very close to the surface of the conveying and support roller 13 with the scanning location, so that possible error levels as a result of the transport time are low being held.
  • the pressure rollers 33 When the veneer sheet 12 enters the machine, the pressure rollers 33 are in their raised position. The veneer sheet 12 is aligned with the pivoted stop fingers 39. Now the pressure rollers 33 are simultaneously lowered and the ana-finger fingers 39 are swung up, so that the veneer sheet 12 released at the front edge is forcibly conveyed further by the conveyor belts 15 and the pressure rollers 33.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacture Of Wood Veneers (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

Bei einer Maschine zum Bearbeiten von Furnierblättern im Durchlauf nacheinander, mit einer waagerechten Förder- und Stützwalze (13) und einem oberhalb der Walze auf diese zu- und von dieser fortbewegbaren Messer (14), zowie mit einer Abtasteinrichtung und einer meindestens ein Förderband (15) aufweisenden, vor der Förder- und Stützwalze (13) angeordneten Fördereinrichtung für die Furnierblätter, weist die Abtasteinrichtung mehrere gleiche, jeweils an schwenkbaren parallelen Hebeln gelagerte Tastrollen (18) auf, welche oberhalb eines Maschinentisches (11) der Fördereinrichtung auf dem dort durchlaufenden Furnierblatt abgestützt sind.In a machine for processing veneer sheets one after the other, with a horizontal conveyor and support roller (13) and a knife (14) which can be moved towards and away from the roller above the roller, as well as with a scanning device and at least one conveyor belt (15 ), in front of the conveyor and support roller (13) arranged conveyor for the veneer sheets, the scanning device has several identical, each mounted on pivotable parallel levers rollers (18), which above a machine table (11) of the conveyor on the veneer sheet passing there are supported.

Description

Die Erfindung betrifft eine Maschine sum Bearbeiten von Furnierblättern im Durchlauf nacheinander, mit einer wasgerechten Förder- und Stützwalze und einem oberhalb der Walze auf diese zu- und von dieser fortbewegbaren Messer, sowie mit einer Abtasteinrichtung und einer -mindestens ein Förderband aufweisenden, vor der Förder-und Stätzwalze angeordneten Fördereinrichtung für die Furnierblätter.The invention relates to a machine sum processing veneer sheets in succession, with a proper conveyor and support roller and a above the roller to and from this moving knife, and with a scanning device and having at least one conveyor belt before the conveyor and conveyor roller arranged conveyor for the veneer sheets.

Mit einer solchen bekannten Maschine lassen sich nacheinander Furnierblätter in den Messerbereich fördern, dort von der Abtasteinrichtung überprüfen und solche Furnierblattbersiche, die beispielsweise nicht die erforderliche Dicke aufweisen, herausschneiden. Das Abtasten dieser Abfallbereiche erfolgt oberhalb der Förder- und Stütszwalze, auf welcher das Furnierblatt tangential aufliegend abgestützt ist. Die Verwendung der Mantelfläche der Förder- und Stützwalze als "Auflagetisch" für den Abzutastenden Furnierblattbereich hat jedoch den Nachteil, das die Genauigkeit der Abtastung wegen der gekrümmten Oberfläche der Förder- und Stützwalze zu wünschen übrig läßt. Außerdem wirken sich Abweichungen der Mantelfläche der Fürder- und Stützwalze von der genau kreiszylindrischen Form ungünstig auf die Genauigkeit der Abtastung der Furnier-Elasttdicke aus. Diese Abweichung von der Kreiszylinderform wird bekanntlich mit "Schlag" bezeichnet.With such a known machine, veneer sheets can be successively conveyed into the knife area, checked there by the scanning device, and those veneer sheet sections that do not have the required thickness, for example, can be cut out. These waste areas are scanned above the conveyor and support roller on which the veneer sheet is supported tangentially. However, the use of the lateral surface of the conveyor and support roller as a "support table" for the veneer sheet area to be scanned has the disadvantage that the accuracy of the scanning leaves something to be desired because of the curved surface of the conveyor and support roller. In addition, deviations of the outer surface of the feed and backup roller from the precisely circular cylindrical shape have an unfavorable effect on the accuracy of the scanning of the veneer elastic thickness. This deviation from the circular cylindrical shape is known as "blow".

Der Erfindung liegt die Aufgabe zugrunde, die Maschine zum Bearbeiten von Furnierblättern so weiterzuentwickeln, daß eine wesentlich genauere Abtastung der Dicke der durchlaufenden Furnierblätter möglich ist. Die Maschine soll beispieslsweise auch Furniere durch Abtasten kontrollieren können, deren Dicke nur 0,5 mm beträgt.The invention has for its object to develop the machine for processing veneer sheets so that a much more accurate detection of the thickness of the veneer sheets is possible. For example, the machine should also be able to check veneers by scanning, the thickness of which is only 0.5 mm.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, deß die Abtasteinrchtung mehrere gleiche, jeweils an schwenkbaren parallelen Hebeln gelagerte Tastrolle: aufweist, welche oberhalb eines Haschinentisches der Fördereinrichtung auf dem dort durchlaufenden Furnier blatt abgestützt sind. Es wird also als Unterlage für die durchlaufenden Furnierblätter ein Maschinentisch mit ebener waagerechter Tischoberfläche verwendet, auf welchem das Furnierblatt über das Förderband abgestütet ist, so daß sich an der Stelle der Abtaztrollen die Unterlage nicht ändert. Im Gegensatz hierzu ist bei der bekannten Maschine eine ständige Änderung der Unterlage gegeben, weil als Ünterlage die sich während des Fördervorganges drehands Förder- und Stütswalze dient.This object is achieved in that the scanning device has several of the same, each mounted on pivotable parallel levers sensing roller: which are supported above a machine table of the conveyor on the veneer sheet passing through there. It is therefore used as a base for the continuous veneer sheets used with a flat horizontal table surface, on which the veneer sheet is supported on the conveyor belt, so that the base does not change at the location of the Abtaztrollen. In contrast to this, there is a constant change of the base in the known machine because the base which is used during the conveying process drehands conveyor and support roller.

Bevorzugte ist jeder schwenkbare Hebel einer Tastrolle als Winkelhebel ausgebildet, dessen quer zur Förderriobtung verlaufende Schwenkachse in der Schnittlinie seiner beiden Schenkel angeordnet und in einem festen Hebellager gelagert ist. Die Vernedung dieses Winkelhebels ermöglicht eine Übersetzung des durch Dickenänderungen des durchlaufenden Furnierblattes bedingten Hebelausschlages. Während der die Tastrolle tragende untere Schenkel des Winkelhebels kurs ausgeführt ist, hat derasufragende obere Schrankel des Winkelhebels eine wessntlich größere Länge, so daß an seinen freien Ende der Hebelauschlag vergrößert erscheint. Hier kann das Naß einer Dickensbweichung beispielsweise über das Hedienungsorgan eines elektrischen Mikroschalters weitergeleitet werden.Each pivotable lever of a sensing roller is preferably designed as an angle lever, the pivot axis of which extends transversely to the conveying direction is arranged in the intersection line of its two legs and is mounted in a fixed lever bearing. The need for this angle lever enables a translation of the lever deflection caused by changes in the thickness of the continuous veneer sheet. While the lower leg of the angle lever carrying the feeler roller is running course, the upper armature of the angle lever which has a request has a considerably longer length, so that the lever deflection appears enlarged at its free end. Here, the wetness of a thickness variation can be passed on, for example, via the safety device of an electrical microswitch.

Bevorzugte Ausführungsformen der Erfindung sind in den Schutzansprüchen enthalten. Der Schutzumfang erstreckt sich nicht nur auf die beanspruchten Einzelmerkmale, sondern such auf deren Kombination.Preferred embodiments of the invention are contained in the protective claims. The scope of protection extends not only to the individual features claimed, but also to their combination.

Die erfindungsgemäße Naschine ist an eine elektrische Steuerungseinrichtung angeschlossen, die die Tätigkeiten der einzelnen Einrichtungen koordiniert. Scbald such nur eine einzige Tastrolle über den Winkelhebel eine unsuläsige Dickenabweuchung des Furnierblattes moldet, bewirkt die Schaltung, daß mit einer Zeitverzögerung von z.B. 1/10 Sekunde der Fördervorgang unterbrochen wird. Das Furnierblatt hat sich dann soweit fortbewegt, daß es sich mit der Grenzlinie seines schadhaften Bereichs auf der als ünterlage für den Schneidvorgang dienenden, nun stillstechenden Förder- und stützwalze befindet, so daß durch Verschiebung des Messers in Richtung Walzencherfläche das Abschneiden erfolgt. Dansch setzt die Schaltung den Fördervorgang wieder is Betrieb.The machine according to the invention is connected to an electrical control device which coordinates the activities of the individual devices. If only a single tracing roller is used to mold the veneer sheet over the angle lever, the switching causes that with a time delay of e.g. The conveying process is interrupted 1/10 second. The veneer sheet has then moved so far that it is located with the boundary line of its defective area on the conveyor and back-up roller, which now serves as an underlay for the cutting process, so that cutting takes place by moving the knife in the direction of the roller surface. Then the circuit restarts the conveying process.

Bei der erfindungsgemäßen Mashine sind also die Stationen für das Schneiden und für das Abtasten räumlich auseinandergerbracht, so daß es möglich ist, wegen der unteränderlichen Oberfläche den Maschinentisches unterhalb der Tastrollen eine sehr genaue Abtastung der Dicke der Furnierblatter durchzuführen und anschließend die Förder- und Stützwalze bei deren kurzem Stillstand als Unterlage für das Abschneiden des Furnierblattes zu benutzen.In the machine according to the invention, the stations for cutting and for scanning are spatially separated, so that it is possible to carry out a very precise scanning of the thickness of the veneer sheets because of the changing surface of the machine table underneath the scanning rollers and then the conveyor and support roller to use their short standstill as a base for cutting the veneer sheet.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden naher beschrisben. Es zeigen;

  • Fig. 1 eine Seitenansicht der Maschine mit teilweise senkreschten Schnitt ;
  • Fig. 2 eine vergrößerte Darstellung des Abtastbereiche der Maschine gemäß Fig. 1;
  • Fig. 3 eine Ansieht der Furnier-Einlaufseite der Maschine ausschnittsweise gemäß Pfeil III der Fig. 1;
  • Fig. 4 eine schematische Darstellung von zusatzeinrichtungen für den Abtast- und Schneidbereich der Maschine in einer Seitenansicht mit teilweisen senkrechten Schbitt.
An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it;
  • Figure 1 is a side view of the machine with a partially cut section.
  • FIG. 2 shows an enlarged illustration of the scanning areas of the machine according to FIG. 1;
  • Fig. 3 is a partial view of the veneer inlet side of the machine according to arrow III of Fig. 1;
  • Fig. 4 is a schematic representation of additional devices for the scanning and cutting area of the machine in a side view with partial vertical section.

Die erfindungsgemäße Maschine weist an einen Maschinengentall 10 einen wangerschten Maschinentisch 11 auf, der sowohl als Fördereinrichtung für Furnierblätter 12 ausgebildet, als such teil einer Abtasteinrichtung für die Dicke der durchlaufenden Furnierblätter 12 ist. In Förderrichtung schliest sich an den Maschinentisch 11 eine Schneidstation an, die eine wangerechte Förder- und Stützwalze 13 und ein oberhalb dieser Walze senkrecht verschiebbares Messer 14 aufweist, welches bei zeiner Bewegung auf die Förder- und Stützwalze 13 zu ein dort auf der außeren Oberfläche abgestützten Furnierblatt 12 rechtwinklig zur Förderrichtung vollständig abschneiden kann.The machine according to the invention has a tangent machine table 11 on a machine, which is designed both as a conveyor for veneer sheets 12 and as part of a scanning device for the thickness of the continuous veneer sheets 12. In the conveying direction, a cutting station connects to the machine table 11, which has a conveying and support roller 13 which is in the right angle and a knife 14 which can be displaced vertically above this roller and which is supported there on the outer surface when moving onto the conveying and support roller 13 Can completely cut veneer sheet 12 perpendicular to the conveying direction.

Fördereinrichtung besteht aus mehreren gleichen, parallel zueinander in Abständen angeordnenten Förderbändern 15, die als Endlosbänder am Maschinentisch 11 umlaufend angeordnet sind, wobei sie auf einem Teilbereich ihrer Länge oberhalb des Maschinentisches 11 entlanggleiten. Diese Förderbänder 15 sind auf mehrere Wellen gespannt. Eine waagerechte, der Förder- und Stützwalze 13 gegenüberliegende Umlenkwelle 16 ist in einer Segmentlagerschale 17 abgestützt, die am Auslaufende der Fördereinrichtung an dem Maschinentisch 11 befestigt ist. Diese Lagerung der Umlenkwelle 16 gewährleistet eine genaue Führung aller Förderbänder im der Förder- und Stützwalze 13 benachbarten Bereich der Fördereinrichtung, wo mehrere Tastrollen 18 die Dicke der durchlaufenden Furnierblätter 12 auf den Förderbander 15 kontrollieren. Am Einlaufende der Fördereinrichtung sind weitere Umlenkwellen 19, 20 und 21 angeordnet, wobei beispielsweise die Umlekwelle 20 die Antriebswlle für die Förderbänder 15 sein kann. In den Maschinentisch 11 ist eine das Gleiten der Förderbänder 15 begünstigende Aufkageplatte 22 auf den größten Teil der Länge eingearbeitet.Conveyor consists of several identical conveyor belts 15 arranged parallel to one another at intervals, which are circumferentially arranged as endless belts on the machine table 11, sliding along a portion of their length above the machine table 11. These conveyor belts 15 are on several Waves excited. A horizontal deflection shaft 16 opposite the conveying and supporting roller 13 is supported in a segment bearing shell 17, which is fastened to the machine table 11 at the outlet end of the conveying device. This mounting of the deflection shaft 16 ensures precise guidance of all conveyor belts in the region of the conveyor device adjacent to the conveyor and support roller 13, where a plurality of feeler rollers 18 control the thickness of the veneer sheets 12 passing through on the conveyor belt 15. Further deflecting shafts 19, 20 and 21 are arranged at the inlet end of the conveying device, wherein, for example, the deflecting shaft 20 can be the drive shaft for the conveyor belts 15. In the machine table 11, a sliding plate 22 which promotes the sliding of the conveyor belts 15 is incorporated over most of the length.

Die für die Überprüfung der Dicke der durchlaufenden Furnierblätter12 vorgeschenen Tastrollen 18 sind jeweils an schwenkbaren Hebeln gelagert. Oberhalb jeden Förderbandes 15 sind im Ausführungsbeispiel zwei Taatrollen 18 mit waagerschten, quer zur Förderrichtung verlaufenden Achgzen an den unteren Schenkeln 23 von Winkelhebeln 24 gelagert, wobei jeder Winkelhebel 24 einen gegenüber dem unteren Schenkel 23 wesentlich längeren aufragenden Schenkel 25 aufweist. Im Verbindungsbereich der beiden Schenkel ist jeder Winkelhebel 24 um eine waagerechte Schwenkachse 26 verschwenkbar gelagert, die ebenzo, wie die Achsen der Tastrollen 18 quer szr Förderrichtung verläuft und in einem testen Hebellager 27 gehalten ist. Während die Tastrolle 18 jeweils am freien Ende des unteren Schenkels 23 des Winkelhebels 24 drehbar gelagert ist, steht das freie Ende des aufragenden Schenkels 25 mit dem Betätigungsorgan 28 eines an der Maschine fest angeordneten Mikroschalters 29 in Berührung.The feeler rollers 18 provided for checking the thickness of the continuous veneer sheets 12 are each mounted on pivotable levers. Above each conveyor belt 15 are two Taatollen 18 in the exemplary embodiment with horizontal, transverse to the conveying direction Achgzen mounted on the lower legs 23 of angle levers 24, each angle lever 24 having a substantially longer upstanding leg 25 compared to the lower leg 23. In the connecting area of the two legs, each angle lever 24 is pivotally mounted about a horizontal pivot axis 26, which is also transverse to the conveying direction, like the axes of the feeler rollers 18, and is held in a test lever bearing 27. While the feeler roller 18 is rotatably supported at the free end of the lower leg 23 of the angle lever 24, it stands the free end of the upstanding leg 25 in contact with the actuator 28 of a microswitch 29 fixed to the machine.

Mit Hilfe einer Sohraubenfeder 30, die innerhalb eines oberhalb der Fördereinrichtung angeordneten featen schäusse 31 der Maschine angeordnet ist, wird der aufragebde Schenkel 25 zum Gehäuse 31 hingezogen und damit die Tastrolle 18 am unteren Schenkel 23 auf das auf den Förderband 15 und dem Maschinentisch 11 aufliegende Furnierblatt 12 gedrückt. Die Vorspannung der Schraubenfeder läßt sich mit Hilfe einer Einstellschraube 32, an der die Schraubenfeder mit ihrem anderen Ende berestigt ist, verändern.With the help of a bell-shaped spring 30, which is arranged within a featen sleeve 31 of the machine arranged above the conveyor, the upstanding leg 25 is pulled towards the housing 31 and thus the feeler roller 18 on the lower leg 23 lies on the conveyor belt 15 and the machine table 11 Veneer sheet 12 pressed. The bias of the coil spring can be changed with the aid of an adjusting screw 32, on which the coil spring is secured at its other end.

Bevor das Furnierblatt 12 in den Abtastbereich gelangt, wird es über einen großen Teil seines Weges mit Hilfe von Andrückrollen 33 auf die Förderbänder 15 und den Maschinentisch 11 gedrückt, so daß es sich in völlig ebener Form dem Abtastbereich mit den Tastrollen nähert. Im Ausfürungsbeispiel sind sechs Andrückrollen 33 oberhalb jedes Förderbandes 15 in Förderrichtung hintereinander angeordnet, wobei alle Andrückrollen oberhalb eines Förderbandes 15 in einem nach unten offenen, im Querschnitt U-förmigen Rollenhalter 34 gelagert sind. Die Achsen der Andrückrollen 33 verlaufen ebenso, wie die Achsen der Tastrollen 18 und die Achse der Förder- und Stützwalze 13 quer zur Förderrichtung.Before the veneer sheet 12 reaches the scanning area, it is pressed over a large part of its path with the aid of pressure rollers 33 onto the conveyor belts 15 and the machine table 11, so that it approaches the scanning area with the scanning rollers in a completely flat form. In the exemplary embodiment, six pressure rollers 33 are arranged one behind the other in the conveying direction above each conveyor belt 15, with all pressure rollers above a conveyor belt 15 being mounted in a downwardly open, cross-sectionally U-shaped roller holder 34. The axes of the pressure rollers 33 run in the same way as the axes of the feeler rollers 18 and the axis of the conveying and supporting roller 13 transversely to the conveying direction.

Zum Anheben bzw. Abzenken des Rollenhalters 34 dient ein in dem Gehäuse 31 angeordneter Zahnstangentrieb 35. Die Andrückkräfte werden mit Hilfe von zwischen den Rollanhalter 34 und dem Zahnstangentrieb 35 angeordneten Schraubenfedern 36 gleichmäßig verteilt. Die relative Verschiebung zwischen dem Zahnstangentrieb 35 und dem Rollenhalter 34 in geringem Maße ermöglichen Führungsbuchsen 37 mit Führungsbolzen 38.A rack and pinion drive 35 arranged in the housing 31 serves to raise or lower the roll holder 34. The pressing forces are applied by means of between the roll holder 34 and the rack and pinion drive 35 ordered coil springs 36 evenly distributed. The relative displacement between the rack and pinion drive 35 and the roller holder 34 to a small extent enables guide bushes 37 with guide bolts 38.

Gemäß Fig. 4 sind schematisch Zusatzeinrichtungen der Maschine dargestellt, die die exakte Arbeitsweise begünstigen. So weist die Maschine mehrere hochschwenkbare Anschlagfinger 39 auf, an denen die ankommenden rechteckigen Furnierblätter 12 mit ihrer Vorderkante anschlagen und dadurch genau rechtwinklig zur Förderrichtung ausgerichtet werden. Außerdem ist die Maschine mit hochschwenkbaren Niederhaltern 40 versehen, die das Furnierblatt in der Mähe seiner Schnittstelle auf die Förder- und Stützwalze 13 aufdrücken.4, additional devices of the machine are shown schematically, which favor the exact working method. The machine thus has a plurality of swiveling stop fingers 39 against which the incoming rectangular veneer sheets 12 strike with their front edge and are thereby aligned exactly at right angles to the conveying direction. In addition, the machine is provided with hold-down devices 40 which can be swiveled up and which press the veneer sheet onto the conveying and support roller 13 in the vicinity of its interface.

Die erfindungsgemäße Maschine arbeitet wie folgt. Ein z.B, rechteckiges Furnierblatt 12 wird an der Einlaufstelle auf den Maschinentisch 11 und die dort umlaufenden Förderbänder 15 gelegt und von diesen in den Bereich der Andrüokrollen 33 eingesogen. Beim Durchlauf gelangt das Furnierblatt unter die Tastrollen 18 der Abtasteinrichtung. Sofern hier die Bicke des durchlaufenden Furnierblattea in den gewünschten Grenzen schwenkt, erfolgt der Weitertransport über die Förder- und Stützwalze 13 aus der Maschine heraus. Weist ein Furnierblatt jedoch eine Fehlstelle auf, beispielsweise einen Bereich mit zu geringer Dicke, so verändert die dort befindliche Tastrolle 18 beim Durchlaufen der schadhaften Stelle oder beispielsweise eines Loches des Furnierblattes ihren Abstand von der Oberfläche des Maschinentischs 11. Die Tastrolle 18 nähert sich dem Tisch in dem Maße, wie die erforderliche Dicke des Furnierblattes nicht vorhanden ist. Dadurch wird der Winkelhebel 24 um seine Sshwenkachse 26 so verscbwenkt, daß das freie Ende des aufragenden Schenkels 25 einen genügend großen Schwenkweg ausführt, um über das Betätigungsorgan 28 den Mikroschalter 29 au betätigen. Dieser Verschwenkungsweg ist infolge der wesentlich größeren Länge des aufragenden Sohenkels 25 gegenüber der Länge des unteren Schenkels 23 auf einen großen Wert übertetzt worden. Eine sehr geringe Dickenänderung des Furnierblattes, die die Tastrolle 18 abtastet, kann somit einen ausreichenden Ausschlag am Betätigunggsorgan 28 zur Volge haben.The machine according to the invention works as follows. A, for example, rectangular veneer sheet 12 is placed at the entry point on the machine table 11 and the conveyor belts 15 rotating there and sucked into the area of the pressure rollers 33. During the passage, the veneer sheet passes under the sensing rollers 18 of the scanning device. If the bend of the continuous veneer sheet swings within the desired limits, further transport takes place out of the machine via the conveyor and support roller 13. However, if a veneer sheet has a defect, for example an area with too little thickness, the feeler roller 18 located there changes its distance from the surface of the machine table 11 as it passes through the damaged area or, for example, a hole in the veneer sheet. The feeler roller 18 approaches the table to the extent necessary Thickness of the veneer sheet does not exist. As a result, the angle lever 24 is pivoted about its pivot axis 26 such that the free end of the upstanding leg 25 executes a sufficiently large pivot path to actuate the microswitch 29 via the actuating member 28. This pivoting path has been translated to a large value due to the much greater length of the upstanding leg 25 compared to the length of the lower leg 23. A very slight change in the thickness of the veneer sheet, which scans the feeler roller 18, can thus have a sufficient deflection on the actuating member 28.

Die Betätigung des Mikroschalters 29 bewirkt nun, daß die Sehaltung der Maschine nach einer kurzen Zeit den gesamten Vördervorgang absehaltet. Diese Zeit iat so bemessen, daß das Furnierblatt mit der Grenzlinis zwischen den guten, die gewünschte Dicke aufweisenden Bereich und der schadhaften Stelle bis zu seiner Schnittstelle auf der Förder- und Stützwalze 13 unterhalb des Messers 14 gelangt ist, wenn der Fördervorgang abgeschaltet ist. Nun wird auf der gesamten breite des Furnierblattes durch Herunterfahren des Messers 14 die schadhafte Stelle herausgeschnitten. Die Schaltung ist so eingerishtet, daß das Messer 14 einen dis schadhafte Stelle enthaltenden Streifen aus dem Furnierblatt herausschneidet, also zweimal herunter- und heraufgefahren wird. wobei zwischen diesen beiden Vorgängen eine Förderung des Furnierblattes liegt, die der Länge der schadhaften Stelle in Förderrichtung entspricht. Der Streifen mit der schadhaften Stelle kann durch eine besondere, in Förderrichtung aich an der Förder- und Stützwalse 13 anschließende Abfördereinrichtung ausgesondert werden, so daß die einwandfreien Furnierblätter und die Abfallstreifen getrennt weitergefördert werden.The actuation of the microswitch 29 now causes the sight of the machine to stop the entire conveying process after a short time. This time is such that the veneer sheet with the boundary line between the good, the desired thickness and the damaged area has reached its interface on the conveyor and support roller 13 below the knife 14 when the conveying process is switched off. Now the damaged area is cut out across the entire width of the veneer sheet by lowering the knife 14. The circuit is set up in such a way that the knife 14 cuts a strip containing a defective spot out of the veneer sheet, that is to say it is moved down and up twice. between these two processes there is a promotion of the veneer sheet, which corresponds to the length of the damaged point in the conveying direction. The strip with the damaged area can be removed by a special conveyor which adjoins the conveyor and support roller 13 in the conveying direction be sorted out so that the flawless veneer and the waste strips are conveyed separately.

Der Durchmesser der Umlenkwelle 16 ist wesentlich kleiner als der Durchmesser der Fördër- und Stützwalze 13. Auf diese Weise ist es möglich, sehr nahe an die Oberfläche der Förder- und Stützwalze 13 mit der Abtaztstelle heranzukommen, so daß mögliche Fehlergrensen in Folge der Transportzeit gering gehalten werden.The diameter of the deflection shaft 16 is substantially smaller than the diameter of the conveying and support roller 13. In this way it is possible to get very close to the surface of the conveying and support roller 13 with the scanning location, so that possible error levels as a result of the transport time are low being held.

Bein Einlaufen des Furnierblattes 12 in die Maschine befinden sich die Andrückrollen 33 in ihrer angehobenen Stellung. Das Furnierblatt 12 wird an den abgeschwenkten Anschlagfingern 39 ausgerichtet. Nun erfolgt gleichzeitig das Absenken der Andrückrollen 33 und das Hochschwenken der Anaohlagfinger 39, so daß das an der Vorderkante freigegebene Furnierblatt 12 zwangsweise von den Förderbändern 15 und den Andrückrollen 33 weitergefördert wird.When the veneer sheet 12 enters the machine, the pressure rollers 33 are in their raised position. The veneer sheet 12 is aligned with the pivoted stop fingers 39. Now the pressure rollers 33 are simultaneously lowered and the ana-finger fingers 39 are swung up, so that the veneer sheet 12 released at the front edge is forcibly conveyed further by the conveyor belts 15 and the pressure rollers 33.

Claims (12)

1. Maschine zum Bearbeiten von Furnierblättern im Durchlauf nacheinander, mit einer waagerechten Förder- und Stützwalze und einem oberhalb der Walze auf diese zu- und von dieser fortbewegbaren Messer, sowie mit einer Abtasteinrichtung und einer mindestens ein Fördwrband aufweisenden, vor der Förder- und Stützwalze angeordneten Fördereinrichtung für die Furnierblätter, dadurch gekennzeichnet, daß die Abtasteinrichtung mehrers gleiche, jeweils an schwenkbaren parallelen Hebeln zelagerte Tastrollen (18) aufweist, welche oberhalb eines Maschinentisches (11) der Förder einrichtung auf dem dort durchlaufenden Furnierblatt (12) abgestützt sind.1. Machine for processing veneer sheets in succession, with a horizontal conveyor and support roller and a knife that can be moved towards and away from the roller above the roller, as well as with a scanning device and at least one conveyor belt, in front of the conveyor and support roller arranged conveyor for the veneer sheets, characterized in that the scanning device several The same, each on pivotable parallel levers mounted sensing rollers (18) which are supported above a machine table (11) of the conveyor device on the veneer sheet (12) passing there. 2. Maschine nach Anspruch 1, dadurch gekennzeichnet, daß auf dem Maschinentisch (11) in Abständen nebeneinander mehrere parallele, die Förderrichtung des Furnierblattes (12) bestimmende ualaufende Förderbänder (15) angeordnet sind.2. Machine according to claim 1, characterized in that on the machine table (11) a plurality of parallel, the conveying direction of the veneer sheet (12) defining continuous conveyor belts (15) are arranged at intervals. 3. Maschine nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß oberhalb jedes Förderbändes (15) in der Mähe einer gemeinsemen, der Förder-und Stützwalze (13) gegenüberliegenden Umlenkwelle (16) mindestens eine der Tastrollen (18) angeordnet ist.3. Machine according to claims 1 and 2, characterized in that at least one of the sensing rollers (18) is arranged above each conveyor belt (15) in the vicinity of a common deflection shaft (16) opposite the conveyor and support roller (13). 4. Maschine nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die der Förder- und Stützwalze (13) gegenüberliegende Unlenkwells (16) an ihrem von dem Förderband (15) abgewandten Umfangsbereich in einer an den Maschinentisch (11) befestigten Segmentlagerschale (17) abgestütst ist.4. Machine according to claims 1 to 3, characterized in that the conveying and support roller (13) opposite Unlenkwells (16) on their from the conveyor belt (15) facing away from the peripheral region in a to the machine table (11) attached segment bearing shell (17th ) is supported. 5. Maschine nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß jeder schwenkbare Hebel einer Tastrolle (18) als Winkelhebel (24) ausgebildet ist, dessen quer zur Förderrichtung verlaufende Schwenkachse (26) in der Schnittlinie seiner beiden Schenkel (23, 25) angeordnet und in einem festen Hebellager (27) gelagert iat.5. Machine according to claims 1 to 4, characterized in that each pivotable lever of a feeler roller (18) is designed as an angle lever (24), the transverse axis of the pivot axis (26) in the intersection of its two legs (23, 25) arranged and iat stored in a fixed lever bearing (27). 6. Maschine nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß die Tastrolle (18) an dem freien Ende das unteren Schenkels (23) des Winkelhebels (24) gelagert ist.6. Machine according to claims 1 to 5, characterized in that the feeler roller (18) at the free end of the lower leg (23) of the angle lever (24) is mounted. 7. Maschine nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß das freie Ende des von der Schwenkachse (26) aufragenden Schenkels (25) des Winkelhebels (24) mit dem Betütigungsorgan (28) eines fest angeordneten elektrischen Mikroschalters (29) in Berührung steht.7. Machine according to claims 1 to 6, characterized in that the free end of the upstanding from the pivot axis (26) leg (25) of the angle lever (24) with the actuating member (28) of a fixed electrical microswitch (29) in contact stands. 8. Maschine nach den Ansprüchen 1 bis 7, dadurch gekenneichnet, daß an dem aufragenden Schenkel (25) eine in einem festen Gehäuse (31) angeords nete Sschraubenfeder (30) mit eines Ende befestigt ist, die mittels einer das andere Ende haltenden Einstellsehraube (32) vorspannber ist.8. Machine according to claims 1 to 7, characterized in that on the upstanding leg (25) in a fixed housing (31) angeords Nete helical spring (30) is fastened with one end, which by means of an adjusting cap holding the other end ( 32) is preloaded. 9. Maschine nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß oberhalb jedes Förderbandes (15) zwei Tastrollen (18) und in einer zwischen diesen verlaufenden, zum oberen Förderbandabsahnitt parallelen Linie zehrere Andrückrollen (33) hintereinander angeordnet sind, die in einen gemeinsanen höhenverschieblichen Rollenhalter (34) gelagert sind.9. Machine according to claims 1 to 3, characterized in that above each conveyor belt (15) two feeler rollers (18) and in a running between them, parallel to the upper conveyor belt section, zehrere pressure rollers (33) are arranged one behind the other in a common Height-adjustable roll holder (34) are mounted. 10. Maschine nach den Ansprüchen 1 bis 9, dadurch gekennzeichnet, daß der Rollenhalter (34) under Zwischenschaltung von Scbraubenfedern (36) mit einen in den Gehäuse (31) angeordneten, seine Höhenverschiebung bewirkenden Zahnstangentrieb (35) verbunden ist.10. Machine according to claims 1 to 9, characterized in that the roller holder (34) with interposition of screw springs (36) a rack and pinion drive (35) arranged in the housing (31) and causing its height shift is connected. 11. Maschine nach den Ansprüchen 1 bia 10, dadurch gekennzeichnet, daß oberhalb jedes Förderbandes (15) jeweils zwischen einer Tastrolle (18) und der Reihe der Andrückrollen (33) ein bis zur Förder- und Stützwalze (13) reichender Niederhalter (40) für das Furnierblatt (12) hochschwenkbar angeordnet ist.11. Machine according to claims 1 to 10, characterized in that above each conveyor belt (15) between a feeler roller (18) and the row of pressure rollers (33) a hold-down device (40) reaching to the conveyor and support roller (13). for the veneer sheet (12) is arranged so that it can be swung up. 12. Maschine nach den Ansprüchen 1 bis 11, dadurch gekennzeichnet, das jeweils zwischen zwei Förderbändern (15) ein hochachwenkbarer Anachlagfinger (39) angeordnet ist, wobei alle Anschlagfinger (39) in einer quer zur Förderrichtung verlaufenden Reihe stehen.12. Machine according to claims 1 to 11, characterized in that in each case between two conveyor belts (15) a highly pivotable attachment finger (39) is arranged, all stop fingers (39) being in a row running transversely to the conveying direction.
EP19860101201 1985-02-02 1986-01-30 Machine for working veneer sheets Expired - Lifetime EP0190665B1 (en)

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DE3503573 1985-02-02
DE19853503573 DE3503573A1 (en) 1985-02-02 1985-02-02 MACHINE FOR VENEERING SHEETS

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JP3818451B2 (en) * 2004-11-22 2006-09-06 日東電工株式会社 Laminate cutting method
CN108098939A (en) * 2018-01-26 2018-06-01 清远市创意智能科技有限公司 A kind of full-automatic high precision finger joint machine

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DE2808728A1 (en) * 1977-03-30 1978-10-05 Kuper Heinrich Fa Adhesive joint strip cutter for veneer assembly machine - has resilient blade held taut on pressure roller and forwarded against flow

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EP0190665B1 (en) 1991-10-02
DE3503573A1 (en) 1986-08-07
JP2504742B2 (en) 1996-06-05
JPS61225003A (en) 1986-10-06
US4687035A (en) 1987-08-18
ES551512A0 (en) 1986-12-01
ES8701577A1 (en) 1986-12-01
DE3681744D1 (en) 1991-11-07
FI83405C (en) 1991-07-10
FI860295A (en) 1986-08-03
FI83405B (en) 1991-03-28
FI860295A0 (en) 1986-01-22

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