EP2030725B1 - Device and method for aligning workpieces - Google Patents

Device and method for aligning workpieces Download PDF

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Publication number
EP2030725B1
EP2030725B1 EP07017212A EP07017212A EP2030725B1 EP 2030725 B1 EP2030725 B1 EP 2030725B1 EP 07017212 A EP07017212 A EP 07017212A EP 07017212 A EP07017212 A EP 07017212A EP 2030725 B1 EP2030725 B1 EP 2030725B1
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EP
European Patent Office
Prior art keywords
aligning
conveying device
travel
alignment
conveying
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EP07017212A
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German (de)
French (fr)
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EP2030725A1 (en
Inventor
Andreas Lorenz
Achim Gauss
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Homag GmbH
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Homag Holzbearbeitungssysteme GmbH
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Priority to ES07017212T priority Critical patent/ES2342566T3/en
Priority to PL07017212T priority patent/PL2030725T3/en
Priority to EP07017212A priority patent/EP2030725B1/en
Priority to DE502007003320T priority patent/DE502007003320D1/en
Publication of EP2030725A1 publication Critical patent/EP2030725A1/en
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    • 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
    • B27B31/06—Adjusting equipment, e.g. using optical projection

Definitions

  • the invention relates to a device and a method for aligning workpieces, which are preferably at least partially made of wood, wood materials, plastic or the like, according to the preamble of claim 1.
  • Alignment stations of the type mentioned are used in the prior art to bring workpieces that are conveyed on a conveyor in a well-defined position. This ensures that the workpieces in a downstream processing station, such as a continuous saw or a Doppelendprofiler, are processed with high precision.
  • a generic alignment station has the Applicant sold under the name TAL 352. This is equipped with cameras to detect the position of the arranged on a conveyor workpieces when stopped conveyor. On the basis of the detection result, the workpieces are brought by two aligners in a desired position, in order to be subsequently promoted.
  • DE 39 14 640 A1 a transport device for plate-shaped workpieces, in which the workpieces are pulled by means of movable gripper against a stop bar.
  • the invention is based on the idea to further develop the device such that the conveyor does not necessarily have to be stopped when detecting and aligning the workpieces.
  • the invention provides that the alignment device has at least one alignment element, which is movable in the direction of passage at least within limits. In this way, the workpieces to be aligned can be conveyed even in the direction of passage even during the detection and alignment process, ideally with the same speed. As a result, the throughput of the device and a total system containing them increased drastically, without sacrificing the precision of the alignment must be taken into account.
  • the invention provides that the alignment device is set up to actuate the workpiece before the position is detected, in particular to grip it. This ensures that the position of the workpiece after its detection is not undesirably changed by the action of the alignment, which would make the detection result useless.
  • the at least one alignment element is movable transversely to the direction of passage, namely simultaneously to a movement of the at least one alignment element in the direction of passage.
  • the alignment elements may perform the alignment operation transverse to the direction of travel while moving in the direction of travel along with the workpieces to be aligned.
  • the at least one alignment element can take on a variety of forms and, in the structurally simplest case, be formed by at least one sliding element. According to one embodiment of the invention, however, it is provided that at least one alignment element is designed as a gripping element. In this way, the workpieces' can be guided especially safely.
  • the use of a gripping element allows the workpieces to be pushed not only in a first direction, but optionally also retracted in an opposite second direction, for example, to correct an error in a first alignment operation.
  • the use of a gripping element allows a safe transfer of the workpieces to downstream devices.
  • the number of alignment elements is not particularly limited in the present invention. According to one embodiment of the invention, however, it has proved to be advantageous that at least two alignment elements are provided which are movable independently of one another at least in the direction of passage.
  • the throughput of the device according to the invention can be further increased, for example by operating the independently movable alignment elements alternately. For example, in such alternate operation, a first (pair of) alignment member (s) may grip and align a workpiece during its travel motion while a second (pair of) alignment member (s) simultaneously provide a return stroke performs to take over the subsequent workpiece. As a result, the distance between the successive workpieces can be reduced, with a corresponding increase in the throughput.
  • the device according to the invention can be provided in the context of the invention to compensate only a transverse displacement of the workpieces on the conveyor.
  • at least one side of the conveyor at least two alignment elements are provided which are independently movable at least transversely to the direction of passage. In this way, the workpieces to be aligned can both be moved and rotated, whereby any occurring position errors can be corrected.
  • the device has a second conveying device downstream of the conveying device, wherein at least one aligning element can be moved in the direction of passage in at least sections in the region of the second conveying device.
  • the invention provides a method for the continuous alignment of workpieces using a device according to the invention, wherein the method is defined in claim 9 in more detail.
  • This method advantageously realizes the above-mentioned effects of the invention, namely that the throughput of the method or the device can be considerably increased by the continuous conveying of the workpieces - also during the detection or alignment.
  • the invention provides that the workpiece is actuated, in particular gripped, before the position is detected by the alignment device. This ensures that the position of the workpiece after its detection is not undesirably changed by the action of the alignment, which would make the detection result useless.
  • FIG Fig. 1 and 2 An apparatus 1 for aligning workpieces 2 according to the present invention is shown schematically in FIG Fig. 1 and 2 shown.
  • the device 1 is primarily used for conveying and aligning workpieces 2, which consist at least in sections of wood, wood materials, plastic or the like, as they are processed in the field of furniture or kitchen industry, but also in the field of flooring industry.
  • workpieces 2 consist at least in sections of wood, wood materials, plastic or the like, as they are processed in the field of furniture or kitchen industry, but also in the field of flooring industry.
  • other applications or types of work are conceivable within the scope of the present invention.
  • the device 1 has a conveyor 10 for conveying the workpieces 2 in a passage direction, the in Fig. 2 is indicated by arrows, which are in Fig. 2 extend from left to right.
  • the conveyor 10 may be configured in many different ways and comprises in the present embodiment, a plurality of belt conveyors 12. However, chains, sliding surfaces and other conveying elements may be used individually or in combination.
  • the device 1 has a detection device 20 for detecting a position of the conveyed on the conveyor 10 workpieces 2.
  • the detection device 20 in the present embodiment, two cameras 22, which are designed for example as digital or CCD cameras and with a control device not shown in detail are in communication.
  • the cameras 22 are each arranged on a portal 24, which extends transversely to the conveyor 10, so that the Cameras can detect the position of the workpieces 2 from directly above the conveyor 10.
  • the device 1 has an alignment device 30, which has two alignment elements 32, 34 in the present embodiment.
  • the alignment elements 32, 34 are configured in the present embodiment as gripping elements which have, for example, a forceps-like shape whose opening faces the workpieces 2 conveyed on the conveyor 10.
  • gripping elements which have, for example, a forceps-like shape whose opening faces the workpieces 2 conveyed on the conveyor 10.
  • suitable means for example top pressure device and / or vacuum device.
  • the alignment elements 32, 34 are arranged on a guide 36, along which they can be moved in the direction of passage, preferably independently of one another.
  • the alignment elements 32, 34 are arranged on the guide 36, that they are movable transversely to the passage direction, namely simultaneously to a movement of the alignment in the direction of travel and also independently.
  • the alignment elements 32, 34 are arranged transversely to the passage direction on not shown guides and positioned along this motor.
  • the alignment elements 32, 34 are also in communication with the control device not shown in detail, so that the movement operation of the alignment elements 32, 34 can be controlled longitudinally and transversely to the passage direction on the basis of the operation of the conveyor 10 and the detection result of the detection device 20.
  • a second conveyor 40 is provided which in Fig. 1 and Fig. 2 only partially and shown in broken lines. As in Fig. 1 is best seen, is the travel of the gripping elements 32 and 34 (which is defined by the guide 36) overlapping to the conveying path of the second conveyor 40 is arranged.
  • the aligned workpieces 2 are conveyed on the conveyor 10 in the direction of passage.
  • the alignment elements 32, 34 are placed on the guide 36 in a standby position and, as soon as the workpiece 2 to be aligned has reached a predetermined position, accelerates to the conveying speed of the workpiece 2. Then the gripping elements 32, 34 are moved transversely to the direction of passage and grasp the workpiece 2 to be aligned.
  • the workpiece 2 to be aligned is conveyed under the portals 24 in this state, and the cameras 22 detect the actual position of the workpiece 2 on the conveyor, for example by optical image acquisition and subsequent digital evaluation of the acquired image in the control device. If the actual position of the workpiece 2 deviates from the desired position, the alignment elements 32, 34 are moved transversely to the direction of passage under the control of the control device and the workpiece is thus brought into a desired position. Also during this process, the alignment elements 32, 34 move in the direction of passage, and depending on the application, if necessary, can also be used with a reduced conveying speed.
  • the workpiece aligned in this way is transferred from the alignment elements 32, 34 to the downstream, second conveyor 40, wherein the gripping elements 32, 34 release the workpiece 2 only when the second conveyor 40 has gripped the workpiece safely, so as to ensure that the achieved target positioning is maintained.
  • a desired processing can now be carried out.
  • At least one alignment element is provided on opposite sides of the conveyor 10 in each case.
  • guide 36 it would be possible, in addition to the in Fig. 2 shown guide 36 to provide a further guide, which is arranged on the opposite side of the conveyor 10.
  • This additional guide can accommodate further alignment elements, which operate in an analogous manner to the alignment elements 32, 34 described above, wherein also in this case an alternating operation between the two opposite sides is advantageous.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Attitude Control For Articles On Conveyors (AREA)

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Vorrichtung und ein Verfahren zum Ausrichten von Werkstücken, die bevorzugt zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff oder dergleichen bestehen, nach dem Oberbegriff von Anspruch 1.The invention relates to a device and a method for aligning workpieces, which are preferably at least partially made of wood, wood materials, plastic or the like, according to the preamble of claim 1.

Stand der TechnikState of the art

Ausrichtstationen der eingangs genannten Art werden im Stand der Technik eingesetzt, um Werkstücke, die auf einer Fördereinrichtung gefördert werden, in eine genau definierte Lage zu bringen. Hierdurch wird sichergestellt, dass die Werkstücke in einer nachgeordneten Bearbeitungsstation, beispielsweise einer Durchlaufsäge oder einem Doppelendprofiler, mit hoher Präzision bearbeitet werden.Alignment stations of the type mentioned are used in the prior art to bring workpieces that are conveyed on a conveyor in a well-defined position. This ensures that the workpieces in a downstream processing station, such as a continuous saw or a Doppelendprofiler, are processed with high precision.

Eine gattungsgemäße Ausrichtstation hat die Anmelderin unter der Bezeichnung TAL 352 vertrieben. Diese ist mit Kameras ausgestattet, um bei angehaltener Fördereinrichtung die Lage der auf einer Fördereinrichtung angeordneten Werkstücke zu erfassen. Auf der Grundlage des Erfassungsergebnisses werden die Werkstücke von zwei Ausrichtern in eine Sollposition gebracht, um anschließend weitergefördert zu werden.A generic alignment station has the Applicant sold under the name TAL 352. This is equipped with cameras to detect the position of the arranged on a conveyor workpieces when stopped conveyor. On the basis of the detection result, the workpieces are brought by two aligners in a desired position, in order to be subsequently promoted.

Obgleich die bekannte Ausrichtstation ein präzises Ausrichten der Werkstücke ermöglicht, hat sich gezeigt, dass die Förderkapazität der Ausrichtstation kritisch für die Förderkapazität gesamter Anlagen ist, die mit dieser ausgerüstet sind. Es besteht daher das Bedürfnis, die Kapazität bzw. den Durchsatz der bekannten Ausrichtstation gegenüber dem Stand der Technik zu erhöhen.Although the known alignment station allows precise alignment of the workpieces, it has been found that the conveying capacity of the alignment station is critical to the conveying capacity of entire systems equipped with it. There is therefore a need that To increase capacity or the throughput of the known alignment station over the prior art.

Ferner offenbart die DE 39 14 640 A1 eine Transportvorrichtung für plattenförmige Werkstücke, bei welcher die Werkstücke mittels verfahrbarer Greifer gegen eine Anschlagleiste gezogen werden.Further, the DE 39 14 640 A1 a transport device for plate-shaped workpieces, in which the workpieces are pulled by means of movable gripper against a stop bar.

Darstellung der ErfindungPresentation of the invention

Es ist daher Aufgabe der Erfindung, eine gattungsgemäße Vorrichtung zum Ausrichten von Werkstücken der eingangs genannten Art bereitzustellen, die bei hoher Präzision des Ausrichtens einen erhöhten Durchsatz ermöglicht.It is therefore an object of the invention to provide a generic device for aligning workpieces of the type mentioned, which allows for high precision of alignment increased throughput.

Diese Aufgabe wird erfindungsgemäß durch eine Vorrichtung nach Anspruch 1 und ein Verfahren nach Anspruch 9gelöst. Besonders bevorzugte Weiterbildungen der Erfindung sind in den abhängigen Ansprüchen angegeben.This object is achieved by a device according to claim 1 and a method according to claim 9. Particularly preferred developments of the invention are specified in the dependent claims.

Der Erfindung liegt der Gedanke zugrunde, die Vorrichtung derart weiterzuentwickeln, dass die Fördereinrichtung beim Erfassen und Ausrichten der Werkstücke nicht notwendigerweise angehalten werden muss. Zu diesem Zweck ist erfindungsgemäß vorgesehen, dass die Ausrichteinrichtung mindestens ein Ausrichtelement aufweist, das in Durchlaufrichtung zumindest in Grenzen verfahrbar ist. Auf diese Weise können die auszurichtenden Werkstücke sogar während des Erfassungs- und Ausrichtvorganges weiter in Durchlaufrichtung gefördert werden, und zwar im Idealfall mit unveränderter Geschwindigkeit. Hierdurch erhöht sich der Durchsatz der Vorrichtung sowie einer diese enthaltenden Gesamtanlage in drastischem Maße, ohne dass Einbußen bei der Präzision des Ausrichtens in Kauf genommen werden müssen.The invention is based on the idea to further develop the device such that the conveyor does not necessarily have to be stopped when detecting and aligning the workpieces. For this purpose, the invention provides that the alignment device has at least one alignment element, which is movable in the direction of passage at least within limits. In this way, the workpieces to be aligned can be conveyed even in the direction of passage even during the detection and alignment process, ideally with the same speed. As a result, the throughput of the device and a total system containing them increased drastically, without sacrificing the precision of the alignment must be taken into account.

Dabei ist erfindungsgemäß vorgesehen, dass die Ausrichteinrichtung eingerichtet ist, das Werkstück bereits vor dem Erfassen der Position zu betätigen, insbesondere zu greifen. Hierdurch wird sichergestellt, dass die Position des Werkstücks nach deren Erfassung nicht durch die Wirkung der Ausrichteinrichtung unerwünscht verändert wird, was das Erfassungsergebnis unbrauchbar machen würde.In this case, the invention provides that the alignment device is set up to actuate the workpiece before the position is detected, in particular to grip it. This ensures that the position of the workpiece after its detection is not undesirably changed by the action of the alignment, which would make the detection result useless.

Das eigentliche Ausrichten bzw. Verschieben der Werkstücke kann im Rahmen der vorliegenden Erfindung auf unterschiedliche Art und Weise erfolgen. Gemäß einer Weiterbildung der Erfindung hat es sich jedoch als besonders vorteilhaft erwiesen, dass das mindestens eine Ausrichtelement quer zur Durchlaufrichtung verfahrbar ist, und zwar simultan zu einer Verfahrbewegung des mindestens einen Ausrichtelements in Durchlaufrichtung. Auf diese Weise können die Ausrichtelemente den Ausrichtvorgang quer zur Durchlaufrichtung ausführen, während sie sich gemeinsam mit den auszurichtenden Werkstücken in Durchlaufrichtung bewegen. Somit ist weder ein Anhalten der Fördervorrichtung noch das Vorsehen spezieller Anschläge in Durchlaufrichtung erforderlich.The actual alignment or displacement of the workpieces can be done in different ways in the context of the present invention. According to one embodiment of the invention, however, it has proved to be particularly advantageous that the at least one alignment element is movable transversely to the direction of passage, namely simultaneously to a movement of the at least one alignment element in the direction of passage. In this way For example, the alignment elements may perform the alignment operation transverse to the direction of travel while moving in the direction of travel along with the workpieces to be aligned. Thus, neither a stopping of the conveyor device nor the provision of special stops in the direction of passage is required.

Das mindestens eine Ausrichtelement kann im Rahmen der vorliegenden Erfindung vielfältige Formen annehmen und im konstruktiv einfachsten Falle durch mindestens ein Schiebelement gebildet sein. Gemäß einer Weiterbildung der Erfindung ist jedoch vorgesehen, dass mindestens ein Ausrichtelement als Greifelement ausgestaltet ist. Auf diese Weise können die Werkstücke'besonders sicher geführt werden. Darüber hinaus ermöglicht der Einsatz eines Greifelements, dass die Werkstücke nicht nur in einer ersten Richtung geschoben, sondern gegebenenfalls auch in einer entgegengesetzten zweiten Richtung zurückgezogen werden können, beispielsweise um einen Fehler bei einem ersten Ausrichtvorgang zu korrigieren. Darüber hinaus ermöglicht der Einsatz eines Greifelements eine sichere Übergabe der Werkstücke an nachgeordnete Vorrichtungen.Within the scope of the present invention, the at least one alignment element can take on a variety of forms and, in the structurally simplest case, be formed by at least one sliding element. According to one embodiment of the invention, however, it is provided that at least one alignment element is designed as a gripping element. In this way, the workpieces' can be guided especially safely. In addition, the use of a gripping element allows the workpieces to be pushed not only in a first direction, but optionally also retracted in an opposite second direction, for example, to correct an error in a first alignment operation. In addition, the use of a gripping element allows a safe transfer of the workpieces to downstream devices.

Die Anzahl der Ausrichtelemente ist im Rahmen der vorliegenden Erfindung nicht besonders beschränkt. Gemäß einer Weiterbildung der Erfindung hat es sich jedoch als vorteilhaft erwiesen, dass mindestens zwei Ausrichtelemente vorgesehen sind, die zumindest in Durchlaufrichtung unabhängig voneinander verfahrbar sind. Durch das Vorsehen unabhängig verfahrbarer Ausrichtelemente kann der Durchsatz der erfindungsgemäßen Vorrichtung weiter erhöht werden, beispielsweise indem die unabhängig verfahrbaren Ausrichtelemente alternierend arbeiten. Bei einem derartigen alternierenden Betrieb kann beispielsweise ein erstes (Paar von) Ausrichtelement(en) ein Werkstück während seiner Durchlaufbewegung greifen und ausrichten, während ein zweites (Paar von) Ausrichtelement(en) simultan einen Rückhub ausführt, um das nachfolgende Werkstück zu übernehmen. Hierdurch kann der Abstand der aufeinander folgenden Werkstücke vermindert werden, mit entsprechender Erhöhung des Durchsatzes.The number of alignment elements is not particularly limited in the present invention. According to one embodiment of the invention, however, it has proved to be advantageous that at least two alignment elements are provided which are movable independently of one another at least in the direction of passage. By providing independently movable alignment elements, the throughput of the device according to the invention can be further increased, for example by operating the independently movable alignment elements alternately. For example, in such alternate operation, a first (pair of) alignment member (s) may grip and align a workpiece during its travel motion while a second (pair of) alignment member (s) simultaneously provide a return stroke performs to take over the subsequent workpiece. As a result, the distance between the successive workpieces can be reduced, with a corresponding increase in the throughput.

Um bei diesem Konzept eine hohe Gestaltungsfreiheit der Vorrichtung und eine geringe gegenseitige Beeinträchtigung der unabhängig verfahrbaren Ausrichtelemente zu ermöglichen, ist gemäß einer Weiterbildung der Erfindung vorgesehen, dass auf gegenüberliegenden Seiten der Fördereinrichtung jeweils mindestens ein Ausrichtelement vorgesehen ist.In order to allow a high freedom of design of the device and a low mutual interference of the independently movable alignment elements in this concept, according to a development of the invention that on opposite sides of the conveyor at least one alignment element is provided.

Die erfindungsgemäße Vorrichtung kann im Rahmen der Erfindung dazu vorgesehen sein, lediglich eine Querverschiebung der Werkstücke auf der Fördereinrichtung auszugleichen. Um darüber hinaus jedoch auch eine Verdrehung der Werkstücke auf der Fördereinrichtung auszugleichen, ist gemäß einer Weiterbildung der Erfindung vorgesehen, dass auf mindestens einer Seite der Fördereinrichtung mindestens zwei Ausrichtelemente vorgesehen sind, die zumindest quer zur Durchlaufrichtung unabhängig voneinander verfahrbar sind. Auf diese Weise können die auszurichtenden Werkstücke sowohl verschoben als auch verdreht werden, wodurch jegliche auftretenden Lagefehler korrigiert werden können.The device according to the invention can be provided in the context of the invention to compensate only a transverse displacement of the workpieces on the conveyor. However, in order to compensate beyond a rotation of the workpieces on the conveyor, is provided according to a development of the invention that at least one side of the conveyor at least two alignment elements are provided which are independently movable at least transversely to the direction of passage. In this way, the workpieces to be aligned can both be moved and rotated, whereby any occurring position errors can be corrected.

Ferner ist gemäß einer Weiterbildung der Erfindung vorgesehen, dass die Vorrichtung eine der Fördereinrichtung nachgelagerte, zweite Fördereinrichtung aufweist, wobei mindestens ein Ausrichtelement auf zumindest abschnittsweise im Bereich der zweiten Fördereinrichtung in Durchlaufrichtung verfahrbar ist. Auf diese Weise wird sichergestellt, dass die durch die Ausrichtelemente erzielte, präzise Ausrichtung der Werkstücke nicht verloren geht, sondern die Werkstücke in einem präzise ausgerichteten Zustand an die nachgelagerte, zweite Fördereinrichtung übergeben werden können, in deren Bereich dann beispielsweise eine nachgelagerte Bearbeitung wie eine Säge- oder Fräsbearbeitung ausgeführt werden kann.Further, according to a development of the invention, it is provided that the device has a second conveying device downstream of the conveying device, wherein at least one aligning element can be moved in the direction of passage in at least sections in the region of the second conveying device. In this way, it is ensured that the precise alignment of the workpieces achieved by the alignment elements is not lost, but that the workpieces can be transferred in a precisely aligned state to the downstream, second conveyor, in whose area then, for example, downstream processing such as a saw - Or milling can be performed.

Gemäß einer weiteren Zielrichtung stellt die Erfindung ein Verfahren zum Durchlaufausrichten von Werkstücken unter Einsatz einer erfindungsgemäßen Vorrichtung bereit, wobei das Verfahren im Anspruch 9 näher definiert ist. Dieses Verfahren realisiert in vorteilhafter Weise die oben genannten Wirkungen der Erfindung, nämlich dass durch das kontinuierliche Fördern der Werkstücke - auch während des Erfassens bzw. Ausrichtens - der Durchsatz des Verfahrens bzw. der Vorrichtung erheblich gesteigert werden kann.According to a further aspect, the invention provides a method for the continuous alignment of workpieces using a device according to the invention, wherein the method is defined in claim 9 in more detail. This method advantageously realizes the above-mentioned effects of the invention, namely that the throughput of the method or the device can be considerably increased by the continuous conveying of the workpieces - also during the detection or alignment.

Dabei ist erfindungsgemäß vorgesehen, dass das Werkstück bereits vor dem Erfassen der Position von der Ausrichteinrichtung betätigt, insbesondere gegriffen wird. Hierdurch wird sichergestellt, dass die Position des Werkstücks nach deren Erfassung nicht durch die Wirkung der Ausrichteinrichtung unerwünscht verändert wird, was das Erfassungsergebnis unbrauchbar machen würde.In this case, the invention provides that the workpiece is actuated, in particular gripped, before the position is detected by the alignment device. This ensures that the position of the workpiece after its detection is not undesirably changed by the action of the alignment, which would make the detection result useless.

Darüber hinaus ist gemäß einer Weiterbildung des erfindungsgemäßen Verfahrens vorgesehen, dass das Werkstück von der Ausrichteinrichtung erst freigegeben wird, wenn das Werkstück an eine nachgelagerte, zweite Fördereinrichtung übergeben wurde, woraus sich die oben im Hinblick auf die zweite Fördereinrichtung diskutierten Vorteile ergeben.In addition, according to a development of the method according to the invention, provision is made for the workpiece not to be released by the alignment device until the workpiece has been transferred to a downstream, second conveying device, resulting in the advantages discussed above with regard to the second conveying device.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Fig. 1Fig. 1
zeigt schematisch eine Seitenansicht einer Vorrichtung zum Ausrichten von Werkstücken als bevorzugte Ausführungsform der Erfindung;shows schematically a side view of an apparatus for aligning workpieces as a preferred embodiment of the invention;
Fig. 2Fig. 2
zeigt schematisch eine Draufsicht der in Fig. 1 gezeigten Vorrichtung.schematically shows a plan view of in Fig. 1 shown device.
Ausführliche Beschreibung bevorzugter AusführungsformenDetailed description of preferred embodiments

Bevorzugte Ausführungsformen der Erfindung werden nachfolgend ausführlich unter Bezugnahme auf die begleitenden Zeichnungen beschrieben.Preferred embodiments of the invention will now be described in detail with reference to the accompanying drawings.

Eine Vorrichtung 1 zum Ausrichten von Werkstücken 2 gemäß der vorliegenden Erfindung ist schematisch in Fig. 1 und 2 gezeigt. Die Vorrichtung 1 dient primär zum Fördern und Ausrichten von Werkstücken 2, die zumindest abschnittsweise aus Holz, Holzwerkstoffen, Kunststoff oder dergleichen bestehen, wie sie im Bereich der Möbel- bzw. Küchenindustrie, aber auch im Bereich der Fußbodenindustrie bearbeitet werden. Darüber hinaus sind im Rahmen der vorliegenden Erfindung jedoch auch andere Einsatzgebiete bzw. Werkstückarten vorstellbar.An apparatus 1 for aligning workpieces 2 according to the present invention is shown schematically in FIG Fig. 1 and 2 shown. The device 1 is primarily used for conveying and aligning workpieces 2, which consist at least in sections of wood, wood materials, plastic or the like, as they are processed in the field of furniture or kitchen industry, but also in the field of flooring industry. In addition, however, other applications or types of work are conceivable within the scope of the present invention.

Wie in Fig. 1 und Fig. 2 zu erkennen ist, besitzt die Vorrichtung 1 eine Fördereinrichtung 10 zum Fördern der Werkstücke 2 in einer Durchlaufrichtung, die in Fig. 2 durch Pfeile gekennzeichnet ist, die sich in Fig. 2 von links nach rechts erstrecken. Die Fördereinrichtung 10 kann auf unterschiedlichste Art und Weise ausgestaltet sein und umfasst in der vorliegenden Ausführungsform mehrere Riemenförderer 12. Es können jedoch auch Ketten, Gleitflächen und andere Förderelemente einzeln oder in Kombination zum Einsatz kommen.As in Fig. 1 and Fig. 2 can be seen, the device 1 has a conveyor 10 for conveying the workpieces 2 in a passage direction, the in Fig. 2 is indicated by arrows, which are in Fig. 2 extend from left to right. The conveyor 10 may be configured in many different ways and comprises in the present embodiment, a plurality of belt conveyors 12. However, chains, sliding surfaces and other conveying elements may be used individually or in combination.

Darüber hinaus besitzt die Vorrichtung 1 eine Erfassungseinrichtung 20 zum Erfassen einer Position der auf der Fördereinrichtung 10 geförderten Werkstücke 2. Dabei weist die Erfassungseinrichtung 20 in der vorliegenden Ausführungsform zwei Kameras 22 auf, die beispielsweise als Digital- bzw. CCD-Kameras ausgestaltet sind und mit einer nicht näher gezeigten Steuereinrichtung in Verbindung stehen. Die Kameras 22 sind jeweils an einem Portal 24 angeordnet, das sich quer zur Fördereinrichtung 10 erstreckt, sodass die Kameras die Position der Werkstücke 2 von direkt oberhalb der Fördereinrichtung 10 erfassen können.In addition, the device 1 has a detection device 20 for detecting a position of the conveyed on the conveyor 10 workpieces 2. In this case, the detection device 20 in the present embodiment, two cameras 22, which are designed for example as digital or CCD cameras and with a control device not shown in detail are in communication. The cameras 22 are each arranged on a portal 24, which extends transversely to the conveyor 10, so that the Cameras can detect the position of the workpieces 2 from directly above the conveyor 10.

Weiterhin besitzt die Vorrichtung 1 eine Ausrichteinrichtung 30, die in der vorliegenden Ausführungsform zwei Ausrichtelemente 32, 34 aufweist. Die Ausrichtelemente 32, 34 sind in der vorliegenden Ausführungsform als Greifelemente ausgestaltet, die beispielsweise eine zangenartige Form besitzen, deren Öffnung den auf der Fördereinrichtung 10 geförderten Werkstücken 2 zugewandt ist. Es ist jedoch ebenso möglich, anstelle von Greifelementen alternativ oder zusätzlich Schiebeelemente einzusetzen, wobei es sich in diesem Falle als vorteilhaft erwiesen hat, ein Niederhalten der Werkstücke 2 auf der Fördereinrichtung 10 durch geeignete Mittel (z.B. Oberdruckeinrichtung und/oder Vakuumeinrichtung) sicherzustellen.Furthermore, the device 1 has an alignment device 30, which has two alignment elements 32, 34 in the present embodiment. The alignment elements 32, 34 are configured in the present embodiment as gripping elements which have, for example, a forceps-like shape whose opening faces the workpieces 2 conveyed on the conveyor 10. However, it is also possible, alternatively or additionally, to use sliding elements instead of gripping elements, in which case it has proved advantageous to ensure that the workpieces 2 are held down on the conveyor 10 by suitable means (for example top pressure device and / or vacuum device).

Die Ausrichtelemente 32, 34 sind auf einer Führung 36 angeordnet, entlang der sie in Durchlaufrichtung verfahrbar sind, und zwar vorzugsweise unabhängig voneinander.The alignment elements 32, 34 are arranged on a guide 36, along which they can be moved in the direction of passage, preferably independently of one another.

Darüber hinaus sind die Ausrichtelemente 32, 34 derart auf der Führung 36 angeordnet, dass sie quer zur Durchlaufrichtung verfahrbar sind, und zwar simultan zu einer Verfahrbewegung der Ausrichtelemente in Durchlaufrichtung und auch unabhängig voneinander. Zu diesem Zweck sind die Ausrichtelemente 32, 34 quer zur Durchlaufrichtung auf nicht näher gezeigten Führungen angeordnet und entlang dieser motorisch positionierbar.In addition, the alignment elements 32, 34 are arranged on the guide 36, that they are movable transversely to the passage direction, namely simultaneously to a movement of the alignment in the direction of travel and also independently. For this purpose, the alignment elements 32, 34 are arranged transversely to the passage direction on not shown guides and positioned along this motor.

Die Ausrichtelemente 32, 34 stehen ebenfalls mit der nicht näher gezeigten Steuereinrichtung in Verbindung, sodass der Verfahrbetrieb der Ausrichtelemente 32, 34 längs und quer zur Durchlaufrichtung auf der Grundlage des Betriebes der Fördereinrichtung 10 sowie des Erfassungsergebnisses der Erfassungseinrichtung 20 gesteuert werden kann.The alignment elements 32, 34 are also in communication with the control device not shown in detail, so that the movement operation of the alignment elements 32, 34 can be controlled longitudinally and transversely to the passage direction on the basis of the operation of the conveyor 10 and the detection result of the detection device 20.

In Durchlaufrichtung stromabwärts der Fördereinrichtung 10 ist eine zweite Fördereinrichtung 40 vorgesehen, die in Fig. 1 und Fig. 2 nur teilweise und gestrichelt dargestellt ist. Wie in Fig. 1 am besten zu erkennen ist, ist dabei der Verfahrweg der Greifelemente 32 und 34 (der durch die Führung 36 definiert ist) überlappend zu der Förderstrecke der zweiten Fördereinrichtung 40 angeordnet.In the direction of passage downstream of the conveyor 10, a second conveyor 40 is provided which in Fig. 1 and Fig. 2 only partially and shown in broken lines. As in Fig. 1 is best seen, is the travel of the gripping elements 32 and 34 (which is defined by the guide 36) overlapping to the conveying path of the second conveyor 40 is arranged.

Nachfolgend wird der Betrieb der erfindungsgemäßen Vorrichtung beschrieben. Die auszurichtenden Werkstücke 2 werden auf der Fördereinrichtung 10 in Durchlaufrichtung eingefördert. Gleichzeitig werden die Ausrichtelemente 32, 34 auf der Führung 36 in eine Bereitschaftsstellung gebracht und, sobald das auszurichtende Werkstück 2 eine.vorbestimmte Förderposition erreicht hat, auf die Fördergeschwindigkeit des Werkstücks 2 beschleunigt. Daraufhin werden die Greifelemente 32, 34 quer zur Durchlaufrichtung verfahren und greifen das auszurichtende Werkstück 2.The operation of the device according to the invention will be described below. The aligned workpieces 2 are conveyed on the conveyor 10 in the direction of passage. At the same time, the alignment elements 32, 34 are placed on the guide 36 in a standby position and, as soon as the workpiece 2 to be aligned has reached a predetermined position, accelerates to the conveying speed of the workpiece 2. Then the gripping elements 32, 34 are moved transversely to the direction of passage and grasp the workpiece 2 to be aligned.

Das auszurichtende Werkstück 2 wird in diesem Zustand unter den Portalen 24 hindurch gefördert, und die Kameras 22 erfassen die Ist-Position des Werkstücks 2 auf der Fördereinrichtung, beispielsweise durch eine optische Bilderfassung und anschließende digitale Auswertung des erfassten Bildes in der Steuereinrichtung. Sofern die Ist-Position des Werkstücks 2 von der Sollposition abweicht, werden die Ausrichtelemente 32, 34 unter der Steuerung der Steuereinrichtung quer zur Durchlaufrichtung verfahren und das Werkstück so in eine Sollposition gebracht. Auch während dieses Vorganges bewegen sich die Ausrichtelemente 32, 34 in Durchlaufrichtung, wobei je nach Anwendungsfall gegebenenfalls auch mit einer verminderten Fördergeschwindigkeit gearbeitet werden kann.The workpiece 2 to be aligned is conveyed under the portals 24 in this state, and the cameras 22 detect the actual position of the workpiece 2 on the conveyor, for example by optical image acquisition and subsequent digital evaluation of the acquired image in the control device. If the actual position of the workpiece 2 deviates from the desired position, the alignment elements 32, 34 are moved transversely to the direction of passage under the control of the control device and the workpiece is thus brought into a desired position. Also during this process, the alignment elements 32, 34 move in the direction of passage, and depending on the application, if necessary, can also be used with a reduced conveying speed.

Das auf diese Weise ausgerichtete Werkstück wird von den Ausrichtelementen 32, 34 an die nachgeordnete, zweite Fördereinrichtung 40 übergeben, wobei die Greifelemente 32, 34 das Werkstück 2 erst freigeben, wenn die zweite Fördereinrichtung 40 das Werkstück sicher gegriffen hat, sodass sichergestellt wird, dass die erreichte Soll-Positionierung beibehalten wird. Im Bereich der nachgeordneten, zweiten Fördereinrichtung kann nun eine gewünschte Bearbeitung ausgeführt werden.The workpiece aligned in this way is transferred from the alignment elements 32, 34 to the downstream, second conveyor 40, wherein the gripping elements 32, 34 release the workpiece 2 only when the second conveyor 40 has gripped the workpiece safely, so as to ensure that the achieved target positioning is maintained. In the area of the downstream, second conveyor, a desired processing can now be carried out.

Neben der oben diskutierten und in Fig. 1 und Fig. 2 gezeigten Ausführungsform sind im Rahmen der Erfindung zahlreiche weitere Ausführungsformen möglich. So können beispielsweise auch mehr als zwei Ausrichtelemente vorgesehen werden, die beispielsweise auf einer Seite der Fördereinrichtung 10 alternierend und synchron zu der Fördereinrichtung umlaufen, um kontinuierlich Werkstücke zu greifen und auszurichten.In addition to those discussed above and in Fig. 1 and Fig. 2 shown embodiment, numerous other embodiments are possible within the scope of the invention. For example, it is also possible to provide more than two alignment elements which, for example, rotate on one side of the conveyor 10 alternately and synchronously with the conveyor in order to grip and align workpieces continuously.

Darüber hinaus ist gemäß einer alternativen Ausführungsform vorgesehen, dass auf gegenüberliegenden Seiten der Fördereinrichtung 10 jeweils mindestens ein Ausrichtelement vorgesehen ist. Beispielsweise wäre es möglich, zusätzlich zu der in Fig. 2 gezeigten Führung 36 eine weitere Führung vorzusehen, die auf der gegenüberliegenden Seite der Fördereinrichtung 10 angeordnet ist. Diese zusätzliche Führung kann weitere Ausrichtelemente aufnehmen, die in analoger Weise zu den oben beschriebenen Ausrichtelementen 32, 34 arbeiten, wobei auch in diesem Falle ein zwischen den beiden gegenüberliegenden Seiten alternierender Betrieb vorteilhaft ist.In addition, it is provided according to an alternative embodiment that at least one alignment element is provided on opposite sides of the conveyor 10 in each case. For example, it would be possible, in addition to the in Fig. 2 shown guide 36 to provide a further guide, which is arranged on the opposite side of the conveyor 10. This additional guide can accommodate further alignment elements, which operate in an analogous manner to the alignment elements 32, 34 described above, wherein also in this case an alternating operation between the two opposite sides is advantageous.

Claims (10)

  1. Apparatus (1) for aligning work pieces (2) which are preferably in at least one section made of timber, derived timber products, plastic or the like, comprising:
    a conveying device (10) for conveying the work pieces (2) in a direction of through-travel;
    a control device;
    an electronic, in particular optical detection device (20) for detecting a position of the work pieces (2) being conveyed on the conveying device (10), and
    an aligning device (30) for displacing and aligning the work pieces (2) being conveyed on the conveying device (10) on the basis of a detection result of the detection device (20),
    characterised in that
    the aligning device (30) has at least one aligning element (32, 34) which is movable in the direction of through-travel at least within limits, and
    the control device controls the aligning device in such a way that the aligning device already actuates the work piece before detection of the position, in particular grips it.
  2. Apparatus according to claim 1, characterised in that the at least one aligning element (32, 34) is movable transversely to the direction of through-travel, this being simultaneously with a travelling movement of the at least one aligning element (32, 34) in the direction of through-travel.
  3. Apparatus according to claim 1 or 2, characterised in that at least one aligning element (32, 34) is designed as a gripping element.
  4. Apparatus according to claim 1 or 2, characterised in that at least one aligning element (32, 34) is designed as a sliding element.
  5. Apparatus according to any of the preceding claims, characterised in that it has at least two aligning elements (32, 34) which are movable at least in the direction of through-travel independently of each other.
  6. Apparatus according to any of the preceding claims, characterised in that on opposite sides of the conveying device (10) is provided in each case at least one aligning element.
  7. Apparatus according to any of the preceding claims, characterised in that on at least one side of the conveying device (10) are provided at least two aligning elements (32, 34) which are preferably movable at least transversely to the direction of through-travel independently of each other.
  8. Apparatus according to any of the preceding claims, characterised in that it further has a second conveying device (40) mounted behind the conveying device (10), at least one aligning element (34) also being movable in the direction of through-travel in at least one section in the region of the second conveying device (40).
  9. Method for aligning work pieces (2) using an apparatus (1) according to any of the preceding claims, having the steps of:
    conveying a work piece (2) by means of the conveying device (10),
    detecting a position of the work piece (2) being conveyed on the conveying device (10).
    displacing and aligning the work piece (2) being conveyed on the conveying device (10) on the basis of the detection result of the detection device (20),
    detection and/or displacement or alignment being carried out while the work piece (10) is conveyed in the direction of through-travel,
    the work piece (2) is already actuated before detection of the position by the aligning device (30), in particular gripped.
  10. Method according to claim 9, characterised in that the work piece (2) is not released by the aligning device (30) until the work piece (2) has been transferred to a second conveying device (40) mounted behind.
EP07017212A 2007-09-03 2007-09-03 Device and method for aligning workpieces Active EP2030725B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ES07017212T ES2342566T3 (en) 2007-09-03 2007-09-03 DEVICE AND PROCEDURE FOR ALIGNING PARTS.
PL07017212T PL2030725T3 (en) 2007-09-03 2007-09-03 Device and method for aligning workpieces
EP07017212A EP2030725B1 (en) 2007-09-03 2007-09-03 Device and method for aligning workpieces
DE502007003320T DE502007003320D1 (en) 2007-09-03 2007-09-03 Device and method for aligning workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07017212A EP2030725B1 (en) 2007-09-03 2007-09-03 Device and method for aligning workpieces

Publications (2)

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EP2030725A1 EP2030725A1 (en) 2009-03-04
EP2030725B1 true EP2030725B1 (en) 2010-03-31

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DE (1) DE502007003320D1 (en)
ES (1) ES2342566T3 (en)
PL (1) PL2030725T3 (en)

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DE102009048442A1 (en) * 2009-10-07 2011-04-14 Homag Holzbearbeitungssysteme Ag Device and method for aligning workpieces

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3914640C2 (en) 1989-05-03 1994-10-06 Fritz Wilmsmeyer Gmbh & Co Kg Device for aligning plate-shaped workpieces of the same or different format size conveyed on a transport route
DE9316946U1 (en) * 1993-11-05 1994-02-24 IMA-Norte Maschinenfabriken Klessmann GmbH, 33334 Gütersloh Machining center for the machining of plate-shaped workpieces
DE10254504B4 (en) * 2002-11-22 2006-02-16 Tünkers Maschinenbau Gmbh Method for laminating two or more identical or different sheets, and device for carrying out the method

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DE502007003320D1 (en) 2010-05-12
PL2030725T3 (en) 2010-08-31
EP2030725A1 (en) 2009-03-04
ES2342566T3 (en) 2010-07-08

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