EP0681872B1 - Fastening device for a spray device - Google Patents

Fastening device for a spray device Download PDF

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Publication number
EP0681872B1
EP0681872B1 EP95104365A EP95104365A EP0681872B1 EP 0681872 B1 EP0681872 B1 EP 0681872B1 EP 95104365 A EP95104365 A EP 95104365A EP 95104365 A EP95104365 A EP 95104365A EP 0681872 B1 EP0681872 B1 EP 0681872B1
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EP
European Patent Office
Prior art keywords
spraying device
support
coupling
coating material
spraying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95104365A
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German (de)
French (fr)
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EP0681872A2 (en
EP0681872A3 (en
Inventor
Manfred Dankert
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.)
Carlisle Fluid Technologies Germany GmbH
Original Assignee
ITW Oberflaechentechnik GmbH
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Publication of EP0681872A2 publication Critical patent/EP0681872A2/en
Publication of EP0681872A3 publication Critical patent/EP0681872A3/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/60Arrangements for mounting, supporting or holding spraying apparatus
    • B05B15/65Mounting arrangements for fluid connection of the spraying apparatus or its outlets to flow conduits

Definitions

  • the invention relates to a sprayer fastening device for attaching a sprayer on a carrier, in particular on an arm of a robot.
  • Such fastening devices are from EP-A-0 310 358 or EP-A-0 446 963.
  • the sprayers are usually equipped with electrodes, which are connected to a high voltage source and an electrostatic field for electrostatic charging of the coating material. Even the sprayer the invention can be used with such high voltage electrodes be provided.
  • the coating material can be a Be liquid or powder. Liquid Coating material is used, for example, for coating of car bodies. Powder coating material can also be used to coat car bodies are used, but is currently mainly used Coating of other parts used, for example Wall and ceiling elements, housings of household appliances, etc. Sprayers of this type are commonly called "guns" designated. You can choose the shape of hand guns or the Have the form of spray devices, which on a carrier are attached. They are preferred by means of the carrier in different directions relative to the coating objects movable. The carrier can for example, the arm of a robot. To achieve good coating qualities, it is necessary that Sprayer can not wiggle.
  • a sprayer for electrostatic coating of objects with liquid or powder coating material known. It contains an axial to the spray direction Arranged valve needle that is immediately upstream a spray opening cooperates with a valve seat, via what liquid coating material for spray opening can flow.
  • the sprayer has horn-like protrusions on diametrically opposite sides of the sprayed Coating material downstream of the spray opening. In these horn-like protrusions High-voltage electrodes housed in air outlet ducts, from what air to form the atomized Coating material jet flows out.
  • the U.S. PS 4 275 838 shows a sprayer which a Rotation bell instead of a spray opening for atomization of liquid coating material. Furthermore shows U.S. Patent No.
  • an electrostatic sprayer for Spray coating objects with powder Coating material.
  • This sprayer contains one High voltage generator and electrodes for electrostatic Powder charging.
  • the sprayer can optionally with a handle for manual operation or on one Carrier, for example a robot arm, are attached.
  • the object of the invention is to solve a problem Sprayer for spray coating objects like this train that it on a carrier, such as a Robotic arm, quickly attached and separated can without wobbling when attached.
  • the sprayer should be designed so that a change to different coating materials and an exchange of wear elements quickly made can be without long interruptions of the Coating company are required.
  • the drawings show a spray device 2 for Spray coating objects with Coating material which is in the direction of an arrow 4 is sprayed.
  • This spray direction 4 corresponds to the Longitudinal direction of the sprayer 2.
  • Spray device 2 shown contains no electrical High voltage electrodes for electrostatic charging of the coating material.
  • the sprayer 2 can, however be provided with such high voltage electrodes.
  • At the example shown here becomes fluid Coating material used.
  • the sprayer 2 is as pluggable unit, which to their Fastening and connecting your supply lines 60,62,64,68,74,80 to a carrier 6 and to the Supply lines through the carrier 6 are passed through, is attachable.
  • annular air cylinder 10 attached.
  • Carrier 6 has the shape of a plate and is part of it a spray coating system, for example the arm of a robot that controls the sprayer 2 computer-controlled moved relative to an object to be coated.
  • Air cylinder 10 in the Air cylinder 10 is a correspondingly annular Tensioning piston 12 using compressed air in a compressed air chamber 14 against the spray direction against a coupling pin 16 exciting.
  • the coupling pin 16 extends through a first coupling bore 18 formed in the carrier 6 and through a second coupling bore aligned with it 20.
  • the coupling pin 16 protrudes from the carrier 6, so that it can be operated by hand.
  • the second Coupling bore 20 extends radially through a Coupling projection 22, which at the rear end of the Sprayer 2 axially to a central axis 24 of the Sprayer 2 is formed and opposite to Spray direction 4 in a coupling receiving bore 26 Connection plate 8 is inserted.
  • the clutch mounting hole 26 positions the sprayer 2 in radial direction.
  • the sprayer 2 has a front Housing part 28, a middle housing part 30 and one rear housing part 32, which axially one after the other are arranged.
  • the rear housing part 32 is made in one piece from a flange part 34 and the diameter smaller, axially extending from it Coupling projection 22.
  • the flange part 34 lies with his rear, the coupling projection 22 annular surrounding flange surface 36 on the in the spray direction 4 end face 38 of the air cylinder 10.
  • the sprayer 2 If the sprayer 2 is attached to the carrier 6, it will with its coupling projection 22 in the Coupling mounting hole 26 inserted. Then the Coupling bolt 16 through the first bore 18 of the carrier 6 and the second bore 20 in the coupling projection 22 put through.
  • the clutch receiving bore 26, the Coupling projection 22, the coupling pin 16 and the Bores 18 and 20 together form a mechanical one Quick connection device for mechanical fastening the sprayer 2 on the carrier 6.
  • Unlocking position against the spray direction 4 in the 2 shows the locking and clamping position.
  • the compressed air cylinder 10 is on the carrier 6 facing end face open.
  • the compressed air chamber 14 is located on the end facing away from the cylinder 10 and the piston 12.
  • Supply lines There are several for the operation of the spray device 2 Supply lines required. One of them is always a material supply line 60. Furthermore, as others Supply lines a compressed air line 62 for supply of compressed air into the compressed air chamber 14, a Atomizer air line 64 for supplying compressed air for the Atomization of the coating material on one Atomizer nozzle 66 at the downstream end of the sprayer 2, and a third compressed air line 68 for the supply of Compressed air is provided, which has horn-like projections 70 on the atomizing nozzle 66 in the form of air jets 72 directed the atomized coating material jet 4 is to give it a flattened beam shape. A fourth compressed air line 74 is used to supply compressed air into a second compressed air chamber 76 for actuating a Valve piston 78.
  • a fifth Compressed air line 80 for compressed air for washing around High voltage electrodes can be provided for the electrostatic charging of the coating material as well an electrical line, not shown, for supply electrical voltage may be provided.
  • Sprayer 2 contains no high voltage electrodes, which is why also no electrical line is shown.
  • the electrical line can be a high voltage line Supply of high voltage for the high voltage electrodes be.
  • the sprayer 2 contain its own high voltage generator, in which If the electrical line is a low voltage line can be.
  • the valve actuating piston 78 is in the middle housing part 30 in a second compressed air cylinder 82 axially to the first Compressed air cylinder 10 arranged and can by means of compressed air in a second compressed air chamber 76 opposite one axially arranged compression spring 86 of that shown in Fig. 1 Valve closed position in a valve open position be moved.
  • the valve piston 78 of the Compression spring 86 again in the valve closed position shown in Fig. 1 moved back.
  • On the valve actuating piston 78 is axially attached a valve body 88, which with a not shown valve seat cooperates, which is in the flow path of a coating material channel 90 located.
  • All supply lines 60, 62, 64, 68, 74, 80 des Sprayer 2 extend parallel to Sprayer longitudinal axis 24 through the carrier 6 and are plugged into corresponding channels of the sprayer 2.
  • the sprayer longitudinal axis 24 is aligned with the spray direction 4 and is also the central axis of the mechanical Quick coupling device 16, 18, 20, 22, 26. Thereby can the sprayer 2 by a single plug-in movement Sprayer longitudinal direction to all supply lines plugged in and in the coupling receiving bore 26 be plugged in. This allows the sprayer 2 on simple way quickly with the carrier 6 and all Supply lines connected and disconnected again become. When changing the coating material the entire sprayer is replaced by a clean one become. It is no longer necessary to run the coating shop interrupt to clean the sprayer on the carrier 6.
  • Receiving holes 92 and 94 etc. sockets in which the downstream line ends 93 serving as plugs or 95 of the supply lines 60 or 68 etc. be plugged in.
  • the spray device 2 continues to run the mechanical quick connection device 16, 18, 20, 22, 26 held on the carrier 6. Because of the inevitable Freedom of movement between the individual elements can but now wiggle the sprayer 2 relative to the carrier 6 and, for example, around a movement gap 96 in Fig. 1, which between the front of the Coupling bolt 16 and the opposite front the first coupling bore 18 is formed in the carrier 6, move away from the carrier 6. This creates between the adjacent end faces 36 and 38 of the Air cylinder 10 and the flange part 34 a corresponding gap.
  • This the freedom of movement 96 corresponding gap also forms between the downstream face 97 of the Coating material line 60 and one of them opposite annular channel heel 98, which between the receiving bore 92 and the Coating material channel 90 is formed and on which the line end face 97 fits snugly when the Tensioning piston 12 clamps the spray device 2 against the carrier 6.
  • the first with compressed air switched off Air chamber 14 no space between the End face 97 at the downstream end of the Coating material line 60 and the channel shoulder 98 can arise is a compression spring 100 between the carrier 6 and a paragraph 102 opposite it Coating material line 60 clamped.
  • This second Compression spring 100 pushes coating material line 60 through the carrier 6 forward into the Receiving hole and thereby holds the end face 98 of the Coating material line 60 then also in contact with the Channel paragraph 98 of the coating material channel 90, if the compressed air acting on the tensioning piston 12 is switched off becomes.

Landscapes

  • Nozzles (AREA)
  • Catching Or Destruction (AREA)
  • Spray Control Apparatus (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)

Abstract

The attachment uses a mechanical quick-release coupling (16, 18, 20, 22, 26) in combination with a pneumatic clamping device (10, 12, 14) for securing the spray device (2) to the robot arm (6). Pref. the quick-release coupling uses a plug-in coupling with respective halves (22, 26) secured to the spray device and to the end of the robot arm, the pneumatic clamping device providing a pneumatic clamping force when the mechanical quick-release coupling is engaged. <IMAGE>

Description

Die Erfindung betrifft eine Sprühgerät-Befestigungsvorrichtung zur Befestigung eines Sprühgerätes an einem Träger, insbesondere an einem Arm eines Roboters.The invention relates to a sprayer fastening device for attaching a sprayer on a carrier, in particular on an arm of a robot.

Derartige Befestigungsvorrichtungen sind aus EP-A-0 310 358 oder EP-A-0 446 963 bekannt.Such fastening devices are from EP-A-0 310 358 or EP-A-0 446 963.

Die Sprühgeräte sind meistens mit Elektroden versehen, welche an eine Hochspannungsquelle angeschlossen sind und ein elektrostatisches Feld zur elektrostatischen Aufladung des Beschichtungsmaterials erzeugen. Auch das Sprühgerät der Erfindung kann mit solchen Hochspannungselektroden versehen sein. Das Beschichtungsmaterial kann eine Flüssigkeit oder Pulver sein. Flüssiges Beschichtungsmaterial dient beispielsweise zur Beschichtung von Autokarosserien. Pulverförmiges Beschichtungsmaterial kann ebenfalls zur Beschichtung von Autokarosserien verwendet werden, wird jedoch derzeit überwiegend zur Beschichtung von anderen Teilen verwendet, beispielsweise Wand- und Deckenelemente, Gehäuse von Haushaltsgeräten usw. Sprühgeräte dieser Art werden allgemein als "Pistolen" bezeichnet. Sie können die Form von Hand-Pistolen oder die Form von Sprühvorrichtungen haben, welche an einem Träger befestigt sind. Mittels des Trägers sind sie vorzugsweise in verschiedenen Richtungen relativ zu den zu beschichtenden Gegenständen bewegbar. Der Träger kann beispielsweise der Arm eines Roboters sein. Zur Erzielung guter Beschichtungsqualitäten ist es erforderlich, daß das Sprühgerät keine Wackelbewegungen ausführen kann. The sprayers are usually equipped with electrodes, which are connected to a high voltage source and an electrostatic field for electrostatic charging of the coating material. Even the sprayer the invention can be used with such high voltage electrodes be provided. The coating material can be a Be liquid or powder. Liquid Coating material is used, for example, for coating of car bodies. Powder coating material can also be used to coat car bodies are used, but is currently mainly used Coating of other parts used, for example Wall and ceiling elements, housings of household appliances, etc. Sprayers of this type are commonly called "guns" designated. You can choose the shape of hand guns or the Have the form of spray devices, which on a carrier are attached. They are preferred by means of the carrier in different directions relative to the coating objects movable. The carrier can for example, the arm of a robot. To achieve good coating qualities, it is necessary that Sprayer can not wiggle.

Aus der DE-AS 24 46 022 ist ein Sprühgerät zum elektrostatischen Beschichten von Gegenständen mit flüssigem oder pulverförmigem Beschichtungsmaterial bekannt. Es enthält eine axial zur Sprührichtung angeordnete Ventilnadel, die unmittelbar stromaufwärts einer Sprühöffnung mit einem Ventilsitz zusammenwirkt, über welchen flüssiges Beschichtungsmaterial zur Sprühöffnung strömen kann. Das Sprühgerät hat hörnerartige Vorsprünge auf diametral gegenüberliegenden Seiten des versprühten Beschichtungsmaterials stromabwärts der Sprühöffnung. In diesen hörnerartigen Vorsprüngen sind Hochspannungselektroden in Luftauslaßkanälen untergebracht, aus welchen Luft zur Formung des zerstäubten Beschichtungsmaterialstrahles ausströmt. Die US-PS 4 275 838 zeigt ein Sprühgerät, welches eine Rotationsglocke anstelle einer Sprühöffnung zum Zerstäuben von flüssigem Beschichtungsmaterial aufweist. Ferner zeigt die US-PS 4 196 465 ein elektrostatisches Sprühgerät zum Sprühbeschichten von Gegenständen mit pulverförmigem Beschichtungsmaterial. Dieses Sprühgerät enthält einen Hochspannungserzeuger und Elektroden zur elektrostatischen Aufladung des Pulvers. Das Sprühgerät kann wahlweise mit einem Handgriff zur Handbedienung versehen oder an einem Träger, beispielsweise einem Roboterarm, befestigt werden.From DE-AS 24 46 022 is a sprayer for electrostatic coating of objects with liquid or powder coating material known. It contains an axial to the spray direction Arranged valve needle that is immediately upstream a spray opening cooperates with a valve seat, via what liquid coating material for spray opening can flow. The sprayer has horn-like protrusions on diametrically opposite sides of the sprayed Coating material downstream of the spray opening. In these horn-like protrusions High-voltage electrodes housed in air outlet ducts, from what air to form the atomized Coating material jet flows out. The U.S. PS 4 275 838 shows a sprayer which a Rotation bell instead of a spray opening for atomization of liquid coating material. Furthermore shows U.S. Patent No. 4,196,465, an electrostatic sprayer for Spray coating objects with powder Coating material. This sprayer contains one High voltage generator and electrodes for electrostatic Powder charging. The sprayer can optionally with a handle for manual operation or on one Carrier, for example a robot arm, are attached.

Durch die Erfindung soll die Aufgabe gelöst werden, ein Sprühgerät zum Sprühbeschichten von Gegenständen so auszubilden, daß es an einem Träger, beispielsweise einem Roboterarm, schnell befestigt und wieder getrennt werden kann, ohne daß es im befestigten Zustand wackeln kann. Gleichzeitig soll das Sprühgerät so ausgebildet sein, daß ein Wechsel auf verschiedene Beschichtungsmaterialien und ein Austausch von Verschleißelementen schnell vorgenommen werden kann, ohne daß lange Unterbrechungen des Beschichtungsbetriebes erforderlich sind. The object of the invention is to solve a problem Sprayer for spray coating objects like this train that it on a carrier, such as a Robotic arm, quickly attached and separated can without wobbling when attached. At the same time, the sprayer should be designed so that a change to different coating materials and an exchange of wear elements quickly made can be without long interruptions of the Coating company are required.

Diese Aufgabe wird gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst.This object is achieved according to the invention by the Features of claim 1 solved.

Die Erfindung wird im folgenden mit Bezug auf die Zeichnungen anhand einer bevorzugten Ausführungsform als Beispiel beschrieben. In den Zeichnungen zeigen

Fig. 1
einen Längsschnitt längs der Linie III-III in Fig. 3 durch ein Sprühgerät, welches gemäß der Erfindung an einem Träger mittels einer mechanischen Schnell-Verbindungsvorrichtung befestigt ist, jedoch mit dem Träger noch nicht pneumatisch verspannt ist,
Fig. 2
das Sprühgerät von Fig. 1 im Längsschnitt, nachdem es zusätzlich zur mechanischen Befestigung am Träger auch pneumatisch mit dem Träger wackelfrei verspannt wurde,
Fig. 3
einen Querschnitt längs der Ebene III-III von Fig. 1.
The invention is described below with reference to the drawings using a preferred embodiment as an example. Show in the drawings
Fig. 1
3 shows a longitudinal section along the line III-III in FIG. 3 through a spraying device which, according to the invention, is fastened to a carrier by means of a mechanical quick connection device, but is not yet pneumatically clamped to the carrier,
Fig. 2
1 in longitudinal section after it has been pneumatically braced to the carrier in addition to mechanical attachment to the carrier,
Fig. 3
a cross-section along the plane III-III of Fig. 1st

Die Zeichnungen zeigen ein Sprühgerät 2 zum Sprühbeschichten von Gegenständen mit Beschichtungsmaterial, welches in Richtung eines Pfeiles 4 versprüht wird. Diese Sprührichtung 4 entspricht der Längsrichtung des Sprühgerätes 2. Das in den Zeichnungen dargestellte Sprühgerät 2 enthält keine elektrischen Hochspannungs-Elektroden zur elektrostatischen Aufladung des Beschichtungsmaterials. Das Sprühgerät 2 kann jedoch mit solchen Hochspannungselektroden versehen werden. Bei dem hier dargestellten Beispiel wird flüssiges Beschichtungsmaterial verwendet. Das Sprühgerät 2 ist als steckbare Baueinheit ausgebildet, welche zu ihrer Befestigung und zum Anschluß ihrer Versorgungsleitungen 60,62,64,68,74,80 an einen Träger 6 und an die Versorgungsleitungen, welche durch den Träger 6 hindurchgeführt sind, ansteckbar ist.The drawings show a spray device 2 for Spray coating objects with Coating material which is in the direction of an arrow 4 is sprayed. This spray direction 4 corresponds to the Longitudinal direction of the sprayer 2. That in the drawings Spray device 2 shown contains no electrical High voltage electrodes for electrostatic charging of the coating material. The sprayer 2 can, however be provided with such high voltage electrodes. At the example shown here becomes fluid Coating material used. The sprayer 2 is as pluggable unit, which to their Fastening and connecting your supply lines 60,62,64,68,74,80 to a carrier 6 and to the Supply lines through the carrier 6 are passed through, is attachable.

Am Träger 6 ist, auf seiner dem Sprühgerät 2 zugewandten Seite, ein ringförmiger Druckluftzylinder 10 befestigt. Der Träger 6 hat die Form einer Platte und ist Bestandteil einer Sprühbeschichtungsanlage, beispielsweise der Arm eines Roboters, welcher das Sprühgerät 2 computergesteuert relativ zu einem zu beschichtenden Gegenstand bewegt. Im Druckluftzylinder 10 ist ein entsprechend ringförmiger Spannkolben 12 mittels Druckluft in einer Druckluftkammer 14 entgegen der Sprührichtung gegen einen Kupplungsbolzen 16 spannbar. Der Kupplungsbolzen 16 erstreckt sich durch eine in dem Träger 6 gebildete erste Kupplungsbohrung 18 und durch eine mit ihr fluchtende zweite Kupplungsbohrung 20. Der Kupplungsbolzen 16 ragt aus dem Träger 6 heraus, so daß er von Hand bedient werden kann. Die zweite Kupplungsbohrung 20 erstreckt sich radial durch einen Kupplungsvorsprung 22, welcher am hinteren Ende des Sprühgerätes 2 axial zu einer Mittelachse 24 des Sprühgerätes 2 gebildet ist und entgegengesetzt zur Sprührichtung 4 in eine Kupplungsaufnahmebohrung 26 der Anschlußplatte 8 gesteckt ist. Die Kupplungsaufnahmebohrung 26 positioniert das Sprühgerät 2 in radialer Richtung. Das Sprühgerät 2 hat einen vorderen Gehäuseteil 28, einen mittleren Gehäuseteil 30 und einen hinteren Gehäuseteil 32, welche axial nacheinander angeordnet sind. Der hintere Gehäuseteil 32 besteht einstückig aus einem Flanschteil 34 und dem im Durchmesser kleineren, axial sich davon wegerstreckenden Kupplungsvorsprung 22. Der Flanschteil 34 liegt mit seiner rückwärtigen, den Kupplungsvorsprung 22 ringförmig umgebenden Flanschfläche 36 an der in Sprührichtung 4 zeigenden Stirnfläche 38 des Druckluftzylinders 10 an.Is on the carrier 6, on the sprayer 2 facing Side, an annular air cylinder 10 attached. Of the Carrier 6 has the shape of a plate and is part of it a spray coating system, for example the arm of a robot that controls the sprayer 2 computer-controlled moved relative to an object to be coated. in the Air cylinder 10 is a correspondingly annular Tensioning piston 12 using compressed air in a compressed air chamber 14 against the spray direction against a coupling pin 16 exciting. The coupling pin 16 extends through a first coupling bore 18 formed in the carrier 6 and through a second coupling bore aligned with it 20. The coupling pin 16 protrudes from the carrier 6, so that it can be operated by hand. The second Coupling bore 20 extends radially through a Coupling projection 22, which at the rear end of the Sprayer 2 axially to a central axis 24 of the Sprayer 2 is formed and opposite to Spray direction 4 in a coupling receiving bore 26 Connection plate 8 is inserted. The clutch mounting hole 26 positions the sprayer 2 in radial direction. The sprayer 2 has a front Housing part 28, a middle housing part 30 and one rear housing part 32, which axially one after the other are arranged. The rear housing part 32 is made in one piece from a flange part 34 and the diameter smaller, axially extending from it Coupling projection 22. The flange part 34 lies with his rear, the coupling projection 22 annular surrounding flange surface 36 on the in the spray direction 4 end face 38 of the air cylinder 10.

Wenn das Sprühgerät 2 am Träger 6 befestigt wird, wird es mit seinem Kupplungsvorsprung 22 in die Kupplungsaufnahmebohrung 26 gesteckt. Anschließend wird der Kupplungsbolzen 16 durch die erste Bohrung 18 des Trägers 6 und die zweite Bohrung 20 im Kupplungsvorsprung 22 hindurchgesteckt. Die Kupplungsaufnahmebohrung 26, der Kupplungsvorsprung 22, der Kupplungsbolzen 16 und die Bohrungen 18 und 20 bilden zusammen eine mechanische Schnell-Verbindungsvorrichtung zur mechanischen Befestigung des Sprühgerätes 2 am Träger 6.If the sprayer 2 is attached to the carrier 6, it will with its coupling projection 22 in the Coupling mounting hole 26 inserted. Then the Coupling bolt 16 through the first bore 18 of the carrier 6 and the second bore 20 in the coupling projection 22 put through. The clutch receiving bore 26, the Coupling projection 22, the coupling pin 16 and the Bores 18 and 20 together form a mechanical one Quick connection device for mechanical fastening the sprayer 2 on the carrier 6.

Mit dieser mechanischen Schnell-Verbindungsvorrichtung kann jedoch nicht mit Sicherheit eine wackelfreie Verbindung zwischen dem Sprühgerät 2 und dem Träger 6 garantiert werden. Für eine wackelfreie Verspannung dieser beiden Teile miteinander ist der Spannkolben 12 vorgesehen. Der Spannbolzen 16 hat in der zweiten Bohrung 20 des Kupplungsvorsprunges 22 sehr wenig oder keinen radialen Bewegungsspielraum. Jedoch hat der Kupplungsbolzen 16 in der ersten Bohrung 18 der Anschlußplatte 8 in Sprühgeräte-Längsrichtung auf ihrer rückwärtigen Seite soviel radialen Spielraum 42, daß die rückseitige Flanschfläche 36 des hinteren Gehäuseteils 32 gegen die in Sprührichtung 4 zeigende Stirnfläche 38 des Druckluftzylinders 10 bewegt werden kann und darauf festgespannt werden kann, wenn in der Druckluftkammer 14 ein Luftdruck erzeugt wird, welcher den Spannkolben 12 von der in Fig. 1 gezeigten Entriegelungsposition entgegen der Sprührichtung 4 in die in Fig. 2 gezeigte Verriegelungs- und Spannposition drängt. Der Druckluftzylinder 10 ist an seiner dem Träger 6 zugewandten Stirnseite offen. Die Druckluftkammer 14 befindet sich auf der dazu abgewandten Stirnseite zwischen dem Zylinder 10 und dem Kolben 12. Dabei drückt der Spannkolben 12 entsprechend Fig. 2 auf den Kupplungsbolzen 16, wodurch der Kupplungsbolzen 16 zusammen mit dem Kupplungsvorsprung 22 und dem Flanschteil 34 entgegen der Sprührichtung 4 nach hinten gegen die Stirnfläche 38 des Druckluftzylinders 10 gespannt werden. Dadurch ist sichergestellt, daß das Sprühgerät 2 relativ zum Träger 6 nicht wackeln kann, und daß der Kupplungsbolzen 16 nicht aus seinen Bohrungen 18 und 20 herausgezogen werden kann. Um ein unbeabsichtigtes Herausfallen des Kupplungsbolzens 16 auch bei abgeschalteter Druckluft zu vermeiden, kann er mit einer Ringnut 44 versehen sein, in welche eine durch eine Feder 46 belastete Kugel 48 elastisch einrastet, wenn der Kupplungsbolzen 16 seine korrekte Kupplungsposition hat. Die Feder 46 und die von ihr belastete Kugel 48 befinden sich in einer Stellschraube 50, welche stirnseitig in den Kupplungsvorsprung 22 geschraubt ist. Der Druckluftzylinder 10 und der Spannkolben 12 bilden somit eine pneumatische Spannvorrichtung.With this mechanical quick connection device can but not definitely a wobble-free connection guaranteed between the sprayer 2 and the carrier 6 become. For a wobble-free bracing of these two Parts of the tensioning piston 12 are provided. Of the Clamping pin 16 has in the second bore 20 of the Coupling projection 22 very little or no radial Freedom of movement. However, the coupling pin has 16 in the first bore 18 of the connecting plate 8 in the longitudinal direction of the sprayer so much radial on its rear side Clearance 42 that the rear flange surface 36 of the rear housing part 32 against the spray direction 4 end face 38 of the compressed air cylinder 10 moves can be and can be clamped to it when in an air pressure is generated in the compressed air chamber 14, which the tensioning piston 12 from that shown in Fig. 1 Unlocking position against the spray direction 4 in the 2 shows the locking and clamping position. The compressed air cylinder 10 is on the carrier 6 facing end face open. The compressed air chamber 14 is located on the end facing away from the cylinder 10 and the piston 12. The presses Clamping piston 12 according to Fig. 2 on the coupling pin 16, whereby the coupling pin 16 together with the Coupling projection 22 and the flange part 34 against the Spray direction 4 to the rear against the end face 38 of the Air cylinder 10 can be tensioned. This is ensures that the sprayer 2 relative to the carrier 6th can not wobble, and that the coupling pin 16 is not can be pulled out of its holes 18 and 20. To prevent the coupling bolt from accidentally falling out 16 even with compressed air switched off, he can be provided with an annular groove 44 into which a through a spring 46 loaded ball 48 snaps into place when the coupling pin 16 its correct coupling position Has. The spring 46 and the ball 48 loaded by it are located in a set screw 50, which is on the front is screwed into the coupling projection 22. Of the Air cylinder 10 and the tensioning piston 12 thus form a pneumatic clamping device.

Für den Betrieb des Sprühgerätes 2 sind mehrere Versorgungsleitungen erforderlich. Eine davon ist immer eine Materialzufuhrleitung 60. Ferner sind als weitere Versorgungsleitungen eine Druckluftleitung 62 zur Zufuhr von Druckluft in die Druckluftkammer 14, eine Zerstäuberluftleitung 64 zur Zufuhr von Druckluft für die Zerstäubung des Beschichtungsmaterials an einer Zerstäuberdüse 66 am stromabwärtigen Ende des Sprühgerätes 2, und eine dritte Druckluftleitung 68 zur Zufuhr von Druckluft vorgesehen, welche über hörnerartige Vorsprünge 70 an der Zerstäuberdüse 66 in Form von Luftstrahlen 72 auf den zerstäubten Beschichtungsmaterialstrahl 4 gerichtet ist, um ihm eine abgeflachte Strahlform zu geben. Eine vierte Druckluftleitung 74 dient zur Zufuhr von Druckluft in eine zweite Druckluftkammer 76 für die Betätigung eines Ventilkolbens 78. Ferner können eine fünfte Druckluftleitung 80 für Druckluft zur Umspülung von Hochspannungselektroden vorgesehen sein für die elektrostatische Aufladung des Beschichtungsmaterials sowie eine nicht dargestellte elektrische Leitung zur Zufuhr elektrischer Spannung vorgesehen sein. Im vorliegenden Ausführungsbeispiel wurde jedoch angenommen, daß das Sprühgerät 2 keine Hochspannungselektroden enthält, weshalb auch keine elektrische Leitung dargestellt ist. Die elektrische Leitung kann eine Hochspannungsleitung zur Zufuhr von Hochspannung für die Hochspannungselektroden sein. In anderer Ausführungsform kann jedoch das Sprühgerät 2 einen eigenen Hochspannungserzeuger enthalten, in welchem Falle die elektrische Leitung eine Niederspannungsleitung sein kann.There are several for the operation of the spray device 2 Supply lines required. One of them is always a material supply line 60. Furthermore, as others Supply lines a compressed air line 62 for supply of compressed air into the compressed air chamber 14, a Atomizer air line 64 for supplying compressed air for the Atomization of the coating material on one Atomizer nozzle 66 at the downstream end of the sprayer 2, and a third compressed air line 68 for the supply of Compressed air is provided, which has horn-like projections 70 on the atomizing nozzle 66 in the form of air jets 72 directed the atomized coating material jet 4 is to give it a flattened beam shape. A fourth compressed air line 74 is used to supply compressed air into a second compressed air chamber 76 for actuating a Valve piston 78. Furthermore, a fifth Compressed air line 80 for compressed air for washing around High voltage electrodes can be provided for the electrostatic charging of the coating material as well an electrical line, not shown, for supply electrical voltage may be provided. In the present However, embodiment was assumed that Sprayer 2 contains no high voltage electrodes, which is why also no electrical line is shown. The electrical line can be a high voltage line Supply of high voltage for the high voltage electrodes be. In another embodiment, however, the sprayer 2 contain its own high voltage generator, in which If the electrical line is a low voltage line can be.

Der Ventilbetätigungskolben 78 ist im mittleren Gehäuseteil 30 in einem zweiten Druckluftzylinder 82 axial zum ersten Druckluftzylinder 10 angeordnet und kann mittels Druckluft in einer zweiten Druckluftkammer 76 entgegen einer axial angeordneten Druckfeder 86 von der in Fig. 1 dargestellten Ventil-Schließ-Stellung in eine Ventil-Offen-Stellung bewegt werden. Beim Abschalten der Druckluft der zweiten Druckluftkammer 76 wird der Ventilkolben 78 von der Druckfeder 86 wieder in die in Fig. 1 dargestellte Ventil-Schließstellung zurückbewegt. Am Ventilbetätigungskolben 78 ist axial ein Ventilkörper 88 befestigt, welcher mit einem nicht dargestellten Ventilsitz zusammenwirkt, welcher sich im Strömungsweg eines Beschichtungsmaterialkanals 90 befindet.The valve actuating piston 78 is in the middle housing part 30 in a second compressed air cylinder 82 axially to the first Compressed air cylinder 10 arranged and can by means of compressed air in a second compressed air chamber 76 opposite one axially arranged compression spring 86 of that shown in Fig. 1 Valve closed position in a valve open position be moved. When switching off the compressed air of the second Compressed air chamber 76, the valve piston 78 of the Compression spring 86 again in the valve closed position shown in Fig. 1 moved back. On the valve actuating piston 78 is axially attached a valve body 88, which with a not shown valve seat cooperates, which is in the flow path of a coating material channel 90 located.

Alle Versorgungsleitungen 60, 62, 64, 68, 74, 80 des Sprühgeräts 2 erstrecken sich parallel zur Sprühgerätelängsachse 24 durch den Träger 6 hindurch und sind in entsprechende Kanäle des Sprühgerätes 2 gesteckt. All supply lines 60, 62, 64, 68, 74, 80 des Sprayer 2 extend parallel to Sprayer longitudinal axis 24 through the carrier 6 and are plugged into corresponding channels of the sprayer 2.

Die Sprühgerätelängsachse 24 fluchtet mit der Sprührichtung 4 und ist gleichzeitig die Mittelachse der mechanischen Schnell-Kupplungsvorrichtung 16, 18, 20, 22, 26. Dadurch kann das Sprühgerät 2 durch eine einzige Steckbewegung in Sprühgerätelängsrichtung an alle Versorgungsleitungen angesteckt und in die Kupplungsaufnahmebohrung 26 eingesteckt werden. Dadurch kann das Sprühgerät 2 auf einfache Weise schnell mit dem Träger 6 und allen Versorgungsleitungen verbunden und davon wieder getrennt werden. Bei einem Wechsel des Beschichtungsmaterials kann das gesamte Sprühgerät gegen ein sauberes ausgetauscht werden. Es ist nicht mehr nötig, den Beschichtungsbetrieb zu unterbrechen, um das Sprühgerät am Träger 6 zu reinigen. Ebenso kann es einfacher und schneller sein, beim Austausch von Verschleißteilen, wie beispielsweise der Zerstäuberdüse 66, das Sprühgerät 2 gegen ein anderes auszutauschen, so daß nur sehr kurze Betriebsunterbrechungen für den Beschichtungsbetrieb entstehen, während man ausreichend viel Zeit hat, um an dem abgebauten Sprühgerät Verschleißteile auszutauschen.The sprayer longitudinal axis 24 is aligned with the spray direction 4 and is also the central axis of the mechanical Quick coupling device 16, 18, 20, 22, 26. Thereby can the sprayer 2 by a single plug-in movement Sprayer longitudinal direction to all supply lines plugged in and in the coupling receiving bore 26 be plugged in. This allows the sprayer 2 on simple way quickly with the carrier 6 and all Supply lines connected and disconnected again become. When changing the coating material the entire sprayer is replaced by a clean one become. It is no longer necessary to run the coating shop interrupt to clean the sprayer on the carrier 6. Likewise, it can be easier and faster when exchanging of wear parts, such as the atomizer nozzle 66 to replace the sprayer 2 with another, so that only very short business interruptions for the Coating operation arise while one is sufficient has a lot of time to work on the dismantled sprayer Exchange wear parts.

Korrespondierend zu den Versorgungsleitungen 60, 62, 64, 68, 74 und 80 sind im Sprühgerät 2 Aufnahmebohrungen gebildet, von welchen in Fig. 1 nur eine erste Aufnahmebohrung 92 für die Beschichtungsmaterialleitung 60 und eine zweite Aufnahmebohrung 94 für die dritte Druckluftleitung 68 gezeigt sind. Somit bilden diese Aufnahmebohrungen 92 und 94 usw. Steckbuchsen, in welche die als Stecker dienenden stromabwärtigen Leitungsenden 93 bzw. 95 der Versorgungsleitungen 60 bzw. 68 usw. eingesteckt werden.Corresponding to the supply lines 60, 62, 64, 68, 74 and 80 are 2 mounting holes in the sprayer formed, of which only a first in Fig. 1 Receiving hole 92 for the coating material line 60 and a second receiving hole 94 for the third Compressed air line 68 are shown. So they form Receiving holes 92 and 94 etc. sockets, in which the downstream line ends 93 serving as plugs or 95 of the supply lines 60 or 68 etc. be plugged in.

Wenn die Druckluft der ersten Druckluftkammer 14 für den Spannkolben 12 abgeschaltet wird, beispielsweise am Ende eines Arbeitstages, wird das Sprühgerät 2 weiterhin durch die mechanische Schnell-Verbindungsvorrichtung 16, 18, 20, 22, 26 am Träger 6 gehalten. Wegen unvermeidbaren Bewegungsspielräumen zwischen den einzelnen Elementen kann jedoch jetzt das Sprühgerät 2 relativ zum Träger 6 wackeln und beispielsweise sich um einen Bewegungszwischenraum 96 in Fig. 1, welcher zwischen der Vorderseite des Kupplungsbolzens 16 und der gegenüberliegenden Vorderseite der ersten Kupplungsbohrung 18 im Träger 6 gebildet ist, vom Träger 6 wegbewegen. Dadurch entsteht zwischen den aneinander angrenzenden Stirnflächen 36 und 38 des Druckluftzylinders 10 und des Flanschteils 34 ein entsprechender Spalt. Dieser dem Bewegungsspielraum 96 entsprechende Spalt bildet sich auch zwischen der stromabwärtigen Stirnfläche 97 der Beschichtungsmaterialleitung 60 und einem ihr gegenüberliegenden ringförmigen Kanalabsatz 98, welcher zwischen der Aufnahmebohrung 92 und dem Beschichtungsmaterialkanal 90 gebildet ist und an welchem die Leitungsstirnfläche 97 dichtend satt anliegt, wenn der Spannkolben 12 das Sprühgerät 2 gegen den Träger 6 spannt. Damit bei abgeschalteter Druckluft der ersten Druckluftkammer 14 kein Zwischenraum zwischen der Stirnfläche 97 am stromabwärtigen Ende der Beschichtungsmaterialleitung 60 und dem Kanalabsatz 98 entstehen kann, ist eine Druckfeder 100 zwischen den Träger 6 und einen ihm gegenüberliegenden Absatz 102 der Beschichtungsmaterialleitung 60 eingespannt. Diese zweite Druckfeder 100 schiebt die Beschichtungsmaterialleitung 60 durch den Träger 6 hindurch nach vorne in die Aufnahmebohrung und hält dadurch die Stirnfläche 98 der Beschichtungsmaterialleitung 60 auch dann in Anlage an dem Kanalabsatz 98 des Beschichtungsmaterialkanals 90, wenn die auf den Spannkolben 12 wirkende Druckluft abgeschaltet wird.If the compressed air of the first compressed air chamber 14 for the Clamping piston 12 is switched off, for example at the end one working day, the spray device 2 continues to run the mechanical quick connection device 16, 18, 20, 22, 26 held on the carrier 6. Because of the inevitable Freedom of movement between the individual elements can but now wiggle the sprayer 2 relative to the carrier 6 and, for example, around a movement gap 96 in Fig. 1, which between the front of the Coupling bolt 16 and the opposite front the first coupling bore 18 is formed in the carrier 6, move away from the carrier 6. This creates between the adjacent end faces 36 and 38 of the Air cylinder 10 and the flange part 34 a corresponding gap. This the freedom of movement 96 corresponding gap also forms between the downstream face 97 of the Coating material line 60 and one of them opposite annular channel heel 98, which between the receiving bore 92 and the Coating material channel 90 is formed and on which the line end face 97 fits snugly when the Tensioning piston 12 clamps the spray device 2 against the carrier 6. The first with compressed air switched off Air chamber 14 no space between the End face 97 at the downstream end of the Coating material line 60 and the channel shoulder 98 can arise is a compression spring 100 between the carrier 6 and a paragraph 102 opposite it Coating material line 60 clamped. This second Compression spring 100 pushes coating material line 60 through the carrier 6 forward into the Receiving hole and thereby holds the end face 98 of the Coating material line 60 then also in contact with the Channel paragraph 98 of the coating material channel 90, if the compressed air acting on the tensioning piston 12 is switched off becomes.

Claims (11)

  1. A spraying device securing mechanism for securing a spraying device (2) to a support (6), more particularly to an arm of a robot, characterised in that a mechanical rapid connection device (16, 18, 20, 22, 26) and a pneumatic clamping device (10, 12, 14) are provided in combination in such a manner that, by means of the rapid connection device, the spraying device (2) can be rapidly mechanically secured to the support (6) and separated from said support again at a later point in time, and in that, by means of the pneumatic clamping device, the spraying device (2) can be pneumatically clamped to the support (6) so long as it is mechanically secured to the support (6) by means of the mechanical rapid connection device.
  2. A spraying device securing mechanism according to claim 1, characterised in that the spraying device (2) is constructed as a unit which can be fitted onto the support (6), the mechanical rapid connection device (16, 18, 20, 22, 26) being constructed in the form of a pluggable coupling, which comprises a first coupling plug part (22) on the spraying device (2) and a matching second coupling plug part (26) on the support (6), so that the spraying device (2) can be fitted onto the support (6).
  3. A spraying device securing mechanism according to claim 2, characterised in that, of supply lines (60, 62, 64, 68, 74, 80) for the spraying device (2), at least one coating material line (60) is positioned on the support (6) and with the spraying device (2) forms a plug connection (92, 93, 97, 98, 94, 95), which has the same plugging direction as the mechanical rapid connection device (16, 18, 20, 22, 26), so that the said supply line or supply lines are automatically coupled with specific ducts (90, 92, 94) of the spraying device (2) when the spraying device (2) is coupled to the support (6) by means of the mechanical rapid connection device.
  4. A spraying device securing mechanism according to claim 2 or 3, characterised in that the first coupling plug part (22) of the spraying device (2) is a coupling journal (22) and the second coupling plug part (26) of the support (6) is a coupling recess, which axially receives and radially positions the coupling journal (22), amd a coupling bolt (16) is fitted through a first bore (18) in the support (6) and through a second bore (20) in the coupling journal (16) aligned with the first bore, the coupling journal (16) being removable from the outside and having so much more freedom of movement (42) in the first bore (18) in the support (6) in the connection direction of the spraying device (2) that the spraying device (2) can be clamped onto the support (6) by means of the pneumatic clamping device (10, 12, 14), which acts upon the coupling bolt.
  5. A spraying device securing mechanism according to claim 3 or 4, characterised in that at least one (60) of the supply lines (60, 62, 64, 68, 74, 80) of the spraying device (2) is guided through the support (6) offset parallel to the central axis (24) of the mechanical rapid connection device (16, 18, 20, 22, 26) and in this manner prevents a rotation of the spraying device (2) about the central axis (24) of the mechanical rapid connection device.
  6. A spraying device securing mechanism according to one of the preceding claims, characterised in that the pneumatic clamping device (10, 12, 14) comprises a cylinder piston unit (10, 12), whose cylinder (10) and piston (12) can be pneumatically clamped between the spraying device (2) and the support (6) by means of compressed air, which can be introduced at a predetermined pressure into a compressed air chamber (14) formed between the cylinder and piston, in order to clamp the spraying device (2) onto the support (6).
  7. A spraying device securing mechanism according to claim 6, characterised in that the cylinder (10) is secured to the support (6), the piston (12) on its end face remote from the compressed air chamber (14) comprises a piston element extending out of the cylinder (10) and pushing against an end-face opposing part (16) of the spraying device (2).
  8. A spraying device according to claim 7, characterised in that the opposing part (16) of the coupling bolt (16) of the mechanical rapid connecting device (16, 18, 20, 22, 26) is according to one of claims 4 to 6.
  9. A spraying device according to one of claims 6 to 8, characterised in that the cylinder (10) and the piston (12) are annular elements, which concentrically enclose the coupling journal (22) adjacent the support (6).
  10. A spraying device according to one of claims 2 to 9, characterised in that the plugging direction of the spraying device (2) extends in the opposite direction to the coating material spraying direction (4) of the spraying device (2).
  11. A spraying device securing mechanism according to one of claims 3 to 10, characterised in that the coating material line (60) is guided through the support (8) and is fitted into a duct (90, 92) of the spraying device (2), in that a compression spring (110) is clamped between the support (6) and an annular collar (102) of the coating material line (60) on the side of the support (6) facing the spraying device (2), as a result of the spring tensioning of which the coating material line (60) is forced through the support (6) into the duct (90, 92) and is thereby pressed in a sealing-tight manner with its downstream end face (97) against a duct shoulder (98) even when the spraying device (2) moves somewhat away from the support (6) when the compressed air of the pneumatic clamping device (10, 12, 14) is switched off, insofar as clearance spaces between the parts of the mechanical rapid connection device (16, 18, 20, 22, 26) allow for such a movement.
EP95104365A 1994-05-09 1995-03-24 Fastening device for a spray device Expired - Lifetime EP0681872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4416311A DE4416311A1 (en) 1994-05-09 1994-05-09 Sprayer attachment device
DE4416311 1994-05-09

Publications (3)

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EP0681872A2 EP0681872A2 (en) 1995-11-15
EP0681872A3 EP0681872A3 (en) 1997-12-17
EP0681872B1 true EP0681872B1 (en) 1999-10-27

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EP95104365A Expired - Lifetime EP0681872B1 (en) 1994-05-09 1995-03-24 Fastening device for a spray device

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US (1) US5624075A (en)
EP (1) EP0681872B1 (en)
JP (1) JPH0838963A (en)
AT (1) ATE185984T1 (en)
CA (1) CA2148183C (en)
DE (2) DE4416311A1 (en)

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Also Published As

Publication number Publication date
EP0681872A2 (en) 1995-11-15
EP0681872A3 (en) 1997-12-17
CA2148183A1 (en) 1995-11-10
US5624075A (en) 1997-04-29
JPH0838963A (en) 1996-02-13
DE59507116D1 (en) 1999-12-02
CA2148183C (en) 1998-10-06
ATE185984T1 (en) 1999-11-15
DE4416311A1 (en) 1995-11-16

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