EP0172788A1 - Motor-driven hand spraying device for processing plastic compositions - Google Patents

Motor-driven hand spraying device for processing plastic compositions Download PDF

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Publication number
EP0172788A1
EP0172788A1 EP85810371A EP85810371A EP0172788A1 EP 0172788 A1 EP0172788 A1 EP 0172788A1 EP 85810371 A EP85810371 A EP 85810371A EP 85810371 A EP85810371 A EP 85810371A EP 0172788 A1 EP0172788 A1 EP 0172788A1
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EP
European Patent Office
Prior art keywords
piston
threaded spindle
hand
sleeve
drive housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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EP85810371A
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German (de)
French (fr)
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EP0172788B1 (en
Inventor
Reiner Ratzky
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Hilti AG
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Hilti AG
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Priority claimed from DE19843431291 external-priority patent/DE3431291A1/en
Priority claimed from DE19853512967 external-priority patent/DE3512967A1/en
Application filed by Hilti AG filed Critical Hilti AG
Priority to AT85810371T priority Critical patent/ATE34315T1/en
Publication of EP0172788A1 publication Critical patent/EP0172788A1/en
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Publication of EP0172788B1 publication Critical patent/EP0172788B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like
    • B05C17/0103—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like with electrically actuated piston or the like

Definitions

  • the invention relates to a motor-driven hand-held spraying device for processing plastic masses, for example sealing compounds, adhesives, putties or the like, with a receptacle for the plastic mass and a piston which can be moved back and forth over the length of the receptacle, the motor drive of which carries the handle Drive housing is arranged.
  • the receptacle for the plastic mass has a trough-shaped, semi-cylindrical shape for inserting the cartridge when the piston is retracted.
  • the invention can also be used for cylindrical receptacles in order to be able to bring a plastic mass packaged in a film wrapping in front of the piston.
  • hand-held spray guns with compressed air or electric motor drive were created.
  • the compressed air-operated hand-held sprayers require a compressor on site, which is particularly difficult to accommodate when gluing roof covers.
  • the hoses are often contaminated by the processed adhesive and stick together, so that a lot of work has to be done for cleaning.
  • Motor-driven hand-held sprayers with worm drive for the piston have the disadvantage that the piston rod protrudes from the drive housing when the piston is retracted and is slightly bent in rough operation. The device is then no longer usable.
  • wireless handheld spray devices with a rechargeable battery are on the market.
  • the invention has for its object to provide a motor-driven hand-held spray device of the type in which the device for advancing and retracting the piston is also arranged in the retracted position of the piston within the drive housing without extending this housing in accordance with the piston travel.
  • the drive of the piston consists of at least one multi-part telescopic threaded spindle, the driven first threaded spindle of which is axially fixed in the drive housing and has a length such that the remaining threaded spindles are nested in the retracted position of the piston find, and that the last threaded spindle part, which is non-rotatably connected to the piston, is secured against turning.
  • One embodiment is characterized by a telescope-like guide rod which surrounds a central telescopic threaded spindle and is attached on the one hand to the piston and on the other hand to the drive housing and is arranged centrally to the telescopic threaded spindle, with a non-circular cross section of the rod members as a rotation lock for the piston and thus for the last threaded spindle part.
  • the telescopic spindle-like threaded spindle is embedded in a telescopic guide rod, the rod members of which have a non-circular, preferably square cross-section.
  • a further embodiment of the basic idea of the invention is that more than one, eccentrically acting on the piston, jointly driven telescopic threaded spindle are provided as a rotation lock for the piston and thus for the last threaded spindle parts.
  • a further, preferred possibility of securing the piston-side threaded spindle part against rotation is proposed according to the invention, which consists in the fact that the last threaded spindle part connected in a rotationally fixed manner to the piston is the threaded sleeve with the largest diameter, which is on its Piston applied end carries an outwardly projecting pin which engages in a longitudinal slot of an axially movable sleeve, which in turn is guided via a projecting pin in a longitudinal slot of a sleeve defined in the drive housing on the one hand on the piston-side threaded sleeve and on the other hand in the fixed sleeve.
  • the invention provides for the drive thereof that the first threaded spindle part on the drive side is connected to a disk-like flange which is flanged to a concentric spur gear to the threaded spindle parts, and that the flange is fixed axially between the sleeve fixed in the drive housing and the bottom wall of the drive housing.
  • the concentric arrangement of a spur gear in the drive of the telescopic spindle which is made possible by the flange, reduces the space required for the gearbox within the drive housing.
  • a hand-held spraying device is to be provided with a cylindrical receptacle for plastic masses packaged in a film envelope
  • the drive housing together with the telescopic spindle piston drive is detachably connected to the cylindrical receptacle, for example via a bayonet catch.
  • the sleeve fixed in the drive housing is provided with its free end with an annular part which is provided on the outside with a thread for screwing on the sleeve-like receptacle for the plastic mass.
  • This sleeve thus becomes a projecting part of the drive housing which, together with the width of the housing, receives the nested threaded spindle parts when the piston is in the rear end position.
  • the device has a cylindrical receptacle 1 for filling a plastic mass, which ver in a film envelope is packed and is detachably connected to the drive housing 2.
  • the front end of the receptacle 1 is partially closed by an annular disk 3 for receiving a spray nozzle (not shown).
  • a multi-part telescopic threaded spindle 5 is used to move the piston 4 back and forth, the driven first threaded spindle part 5 a of which is axially fixed within the drive housing 2, as will be explained below.
  • the threaded spindle part 5a is provided with a threaded head 7 which engages in the internal thread of the second, sleeve-like threaded spindle part 5c.
  • This threaded sleeve 5c also has a thickened threaded head 8, which engages in the internal thread of the last threaded sleeve 5d of the largest diameter to which the piston 4 is fastened.
  • the threaded sleeves 5c and 5d each with an inwardly projecting ring collar 5c 'or 5d', engage behind the thickened external thread head 7 or 8 of the adjacent threaded spindle part of smaller thickness, in order to limit the gradual moving apart of the telescopic spindle 5 and, by means of a stop, cause a rotary movement on the larger diameter threaded part enable, as is known in principle with telescopic spindles.
  • the anti-rotation device to prevent the piston 4 or the last threaded sleeve 5d from rotating, in particular when the telescopic threaded spindle 5 is drawn in (because then the piston 4 is not held in place by the plastic mass to be pressed out by frictional engagement), consists in the telescopic threaded spindle 5 on a Part of its extended length is surrounded by two sleeves 9 and 10 which are movable relative to one another, of which the sleeve 9 is axially movable and on the one hand on the outer lateral surface of the threaded sleeve 5d and on the other hand in the inner lateral surface of the sleeve 10 which is firmly connected to the housing 2 via screws 11 is led.
  • the two sleeves 9 and 10 have longitudinal slots 9a and 10a.
  • a pin 12 engages in the slot 9a of the movable sleeve 9, which pin is fastened to the inner collar 5d 'applied to the piston 4 and the threaded sleeve 5d to rotate with it prevents on the condition that the sleeve 9 can not rotate.
  • the disk-like flange 14 has a central mandrel 14a which engages in a blind bore 23 of the threaded spindle part 5a.
  • the connection between the mandrel 14a and the threaded spindle part 5a is both non-rotatable and immovable, which is not shown in more detail.
  • the mandrel 14a can, for example, be glued, pressed or welded in the blind bore 23.
  • the threaded spindle part 5a is also axially secured.
  • the part of the central mandrel 14a projecting through the housing wall 2a has a transverse slot 14c for attaching a screwdriver in order to be able to move the telescopic threaded spindle 5 under certain circumstances by hand, for example in order to loosen jams.
  • the housing 2 is pot-shaped and closed by an inserted disc 2b which is fixed by three screws 16.
  • a bearing housing 17 of a handle 18 is embedded in the downwardly projecting part of the disk 2b and fixed by three screws 19, from which a drive shaft 20 is guided, which is driven by an electric motor (not shown) located within the handle 18.
  • the handle 18 can also accommodate a rechargeable battery for powering the electric motor.
  • a spur gear 21 is rotatably connected to the drive shaft 20 and engages with the spur gear 15.
  • the sleeve 10 fixed in the drive housing 2 is provided at its free end with an annular part 22, which is provided on the outside with a thread, preferably a bayonet thread 22a, via which the sleeve-like receptacle 1 for the plastic compound can be connected to the drive housing 2, since the fixed sleeve 10 is an integral part of the drive housing 2, 2b and, due to its large diameter, is able to receive the threaded spindle parts nested when the piston 4 is in its rearward position 4 '.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Abstract

Motorisch angetriebenes Handspritzgerät zum Verarbeiten von plastischen Massen, bei dem die starre Kolbenstange durch mindestens eine mehrteilige Teleskop-Gewindespindel (5) ersetzt ist. Die erste Gewindespindel (5a) liegt im Antriebsgehäuse (2) und ist dort axial festgelegt und reversierbar angetrieben. In Rückzugslage des Kolbens (4) befinden sich alle Gewindespindelteile (5a, 5c, 5d) ineinandergeschachtelt. Der Kolben (4) bzw des am Kolben (4) befestigte letzte Gewindespindelteil (5d) ist über den Kolbenweg gegen Mitdrehen gesichert.Motor-driven hand-held spray gun for processing plastic masses, in which the rigid piston rod is replaced by at least one multi-part telescopic threaded spindle (5). The first threaded spindle (5a) lies in the drive housing (2) and is axially fixed there and reversibly driven. In the retracted position of the piston (4), all threaded spindle parts (5a, 5c, 5d) are nested. The piston (4) or the last threaded spindle part (5d) attached to the piston (4) is secured against turning via the piston path.

Description

Die Erfindung betrifft ein motorisch angetriebenes Handspritzgerät zum Verarbeiten von plastischen Massen, zB Dichtungsmassen, Klebstoffen, Kitten oder dergleichen, mit einer Aufnahme für die plastische Masse und einem über die Länge der Aufnahme hin- und herverstellbaren Kolben, dessen motorischer Antrieb in dem den Handgriff tragenden Antriebsgehäuse angeordnet ist.The invention relates to a motor-driven hand-held spraying device for processing plastic masses, for example sealing compounds, adhesives, putties or the like, with a receptacle for the plastic mass and a piston which can be moved back and forth over the length of the receptacle, the motor drive of which carries the handle Drive housing is arranged.

Ist die plastische Masse in einer dem Kolbendurchmesser entsprechenden Kartusche verpackt, hat die Aufnahme für die plastische Masse eine wannenförmige, halbzylindrische Gestalt zum Einlegen der Kartusche bei zurückgezogenem Kolben. Die Erfindung ist jedoch auch anwendbar für zylindrische Aufnahmen, um eine in eine Folienumhüllung verpackte plastische Masse vor den Kolben bringen zu können.If the plastic mass is packaged in a cartridge corresponding to the piston diameter, the receptacle for the plastic mass has a trough-shaped, semi-cylindrical shape for inserting the cartridge when the piston is retracted. However, the invention can also be used for cylindrical receptacles in order to be able to bring a plastic mass packaged in a film wrapping in front of the piston.

Da das Arbeiten mit handbetriebenen Handspritzgeräten sehr ermüdend ist und dazu verleitet, einen Rest an plastischer Masse in einer Kartusche überhaupt nicht mehr zu verspritzen, wurden Handspritzgeräte mit Druckluft- oder elektromotorischem Antrieb geschaffen. Die druckluftbetriebenen Handspritzgeräte benötigen einen Kompressor auf der Baustelle, der insbesondere beim Verkleben von Dachabdeckungen schwer unterzubringen ist. Die Schläuche sind häufig durch die verarbeitete Klebemasse verunreinigt und kleben zusammen, so dass viel Arbeit für das Reinigen aufgewendet werden muss.Because working with hand-operated hand-held sprayers is very tiring and entices you to leave a bit of plastic No more spraying compound in a cartridge, hand-held spray guns with compressed air or electric motor drive were created. The compressed air-operated hand-held sprayers require a compressor on site, which is particularly difficult to accommodate when gluing roof covers. The hoses are often contaminated by the processed adhesive and stick together, so that a lot of work has to be done for cleaning.

Motorisch angetriebene Handspritzgeräte mit Schneckenantrieb für den Kolben haben den Nachteil, dass die Kolbenstange bei zurückgezogenem Kolben aus dem Antriebsgehäuse herausragt und bei rauhem Betrieb leicht verbogen wird. Das Gerät ist dann nicht mehr brauchbar. Um jedwede Energieleitungen zu vermeiden, sind kabellose Handspritzgeräte mit aufladbarem Akkumulator auf dem Markt.Motor-driven hand-held sprayers with worm drive for the piston have the disadvantage that the piston rod protrudes from the drive housing when the piston is retracted and is slightly bent in rough operation. The device is then no longer usable. In order to avoid any power lines, wireless handheld spray devices with a rechargeable battery are on the market.

Die Erfindung hat sich die Aufgabe gestellt, ein motorisch angetriebenes Handspritzgerät der Gattung zu schaffen, bei dem die Einrichtung zum Vortreiben und Zurückziehen des Kolbens auch bei der zurückgezogenen Lage des Kolbens innerhalb des Antriebsgehäuses angeordnet ist, ohne dieses Gehäuse entsprechend dem Kolbenweg zu verlängern.The invention has for its object to provide a motor-driven hand-held spray device of the type in which the device for advancing and retracting the piston is also arranged in the retracted position of the piston within the drive housing without extending this housing in accordance with the piston travel.

Die Lösung dieser Aufgabe besteht gemäss der Erfindung darin, dass der Antrieb des Kolbens aus mindestens einer mehrteiligen Teleskop-Gewindespindel besteht, deren angetriebene erste Gewindespindel in dem Antriebsgehäuse axial festgelegt ist und eine derartige Länge hat, dass die übrigen Gewindespindeln in Rückzugslage des Kolbens ineinandergeschachtelt Platz finden, und dass das letzte, mit dem Kolben drehfest verbundene Gewindespindelteil gegen Mitdrehen gesichert ist.According to the invention, this object is achieved in that the drive of the piston consists of at least one multi-part telescopic threaded spindle, the driven first threaded spindle of which is axially fixed in the drive housing and has a length such that the remaining threaded spindles are nested in the retracted position of the piston find, and that the last threaded spindle part, which is non-rotatably connected to the piston, is secured against turning.

Es wird also die sonst starre und einteilige Kolbenstange des Kolbens ersetzt durch eine mehrteilige Teleskop-Gewindespindel, über deren reversierbarem Antrieb der Kolben bis in beide Endstellungen bewegt werden kann. Bei der zurückgezogenen Stellung des Kolbens, in der eine neue Kartusche oder Folienumhüllung mit plastischer Masse in die Aufnahme eingebracht wird, liegen alle Gewindespindelteile ineinandergeschachtelt entlang dem ersten, axial festgelegten und drehbar angetriebenen Gewindespindelteil der Teleskop-Gewindespindel. Da eine Teleskop-Gewindespindel sich je nach Antriebsrichtung nur dann verlängert oder verkürzt, wenn das letzte Gewindespindelteil, das drehfest mit dem Kolben verbunden ist, nicht mitdreht, wird die Erfindung dadurch vollendet, dass dieses letzte Gewindespindelteil auf dem gesamten Kolbenweg gegen Mitdrehen gesichert ist. Diese Massnahme ist in erster Linie dann wesentlich, wenn der Kolben beim Zurückstellen unbelastet ist und sich wirkungslos mit der gesamten ausgefahrenen Teleskop-Gewindespindel mitdrehen könnte. Für das Sichern des Kolbens bzw des letzten Gewindespindelteils gegen Mitdrehen gibt es verschiedene konkrete Lösungen.The otherwise rigid and one-piece piston rod of the piston is thus replaced by a multi-part telescopic threaded spindle, via the reversible drive of which the piston up to can be moved to both end positions. When the piston is in the retracted position, in which a new cartridge or film covering with plastic mass is introduced into the receptacle, all threaded spindle parts are nested one inside the other along the first, axially fixed and rotatably driven threaded spindle part of the telescopic threaded spindle. Since a telescopic threaded spindle only lengthens or shortens, depending on the drive direction, if the last threaded spindle part, which is non-rotatably connected to the piston, does not rotate, the invention is accomplished in that this last threaded spindle part is secured against rotating along the entire piston path. This measure is primarily important when the piston is not loaded when it is reset and could ineffectively rotate with the entire extended telescopic threaded spindle. There are various concrete solutions for securing the piston or the last threaded spindle part against turning.

Eine Ausführungsform kennzeichnet sich durch eine eine zentrale Teleskop-Gewindespindel umgebende, einerseits am Kolben und andererseits am Antriebsgehäuse befestigte, zentrisch zur Teleskop- Gewindespindel angeordnete teleskopartige Führungsstange mit unrundem Querschnitt der Stangenglieder als Drehsicherung für den Kolben und damit für das letzte Gewindespindelteil. Bei dieser Lösung ist die teleskopspindelartige Gewindespindel in eine teleskopartige Führungsstange eingebettet, deren Stangenglieder einen unrunden, vorzugsweise quadratischen Querschnitt haben. Da das erste Stangenteil im Antriebsgehäuse undrehbar festgelegt und das letzte Stangenglied mit dem Kolben verbunden ist, wird das auf den Kolben einwirkende Drehmoment der innenliegenden teleskopartigen Gewindespindel durch den Formschluss aller unrunden Stangenglieder aufgenommen. Diese Lösung hat den zusätzlichen Vorteil, dass die teleskopartige Gewindespindel gegen Verunreinigungen geschützt ist.One embodiment is characterized by a telescope-like guide rod which surrounds a central telescopic threaded spindle and is attached on the one hand to the piston and on the other hand to the drive housing and is arranged centrally to the telescopic threaded spindle, with a non-circular cross section of the rod members as a rotation lock for the piston and thus for the last threaded spindle part. In this solution, the telescopic spindle-like threaded spindle is embedded in a telescopic guide rod, the rod members of which have a non-circular, preferably square cross-section. Since the first rod part is non-rotatably fixed in the drive housing and the last rod member is connected to the piston, the torque acting on the piston of the inner telescopic threaded spindle is absorbed by the positive locking of all non-round rod members. This solution has the additional advantage that the telescopic threaded spindle is protected against contamination.

Eine weitere Ausführungsform des Grundgedankens der Erfindung besteht darin, dass mehr als eine exzentrisch am Kolben angreifende, gemeinsam angetriebene Teleskop-Gewindespindel als Drehsicherung für den Kolben und damit für die jeweils letzten Gewindespindelteile vorgesehen sind. Diese Lösung ist zwar aufwendig, weil im Antriebsgehäuse ein gewisser getrieblicher Aufwand erforderlich ist, jedoch hat man es bei dieser Lösung in der Hand, mindestens ein Paar von Teleskop-Gewindespindeln gegenläufig anzutreiben, so dass am Kolben entgegengesetzt gerichtete Drehmomente entstehen, die einander aufheben.A further embodiment of the basic idea of the invention is that more than one, eccentrically acting on the piston, jointly driven telescopic threaded spindle are provided as a rotation lock for the piston and thus for the last threaded spindle parts. Although this solution is complex, because a certain amount of gear is required in the drive housing, it is in this solution in hand to drive at least one pair of telescopic threaded spindles in opposite directions, so that oppositely directed torques arise that cancel each other out.

In Weiterentwicklung des Grundgedankens der Erfindung wird gemäss der Erfindung eine weitere, bevorzugte Möglichkeit der Sicherung des kolbenseitigen Gewindespindelteils gegen Mitdrehen vorgeschlagen, die darin besteht, dass das letzte, mit dem Kolben drehfest verbundene Gewindespindelteil die Gewindehülse mit dem grössten Durchmesser ist, die an ihrem dem Kolben angewandten Ende einen nach aussen vorspringenden Stift trägt, der in einen Längsschlitz einer axialbeweglichen Hülse eingreift, die ihrerseits über einen vorspringenden Stift in einen Längsschlitz einer im Antriebsgehäuse festgelegten Hülse einerseits auf der kolbenseitigen Gewindehülse und andererseits in der feststehenden Hülse geführt ist. Hierdurch eröffnet sich die Möglichkeit, auf der kolbenseitigen Gewindehülse eine längsverschiebliche Hülse und diese wiederum innerhalb einer feststehenden Hülse teleskopartig zu führen, die nur mit Längsschlitzen versehen zu werden brauchen, um diese Hülsen unter sich und letztlich gegenüber der kolbenseitigen Gewindehülse der Teleskopspindel undrehbar festzulegen, und zwar durch jeweiligen formschlüssigen Ineinandergriff mittels in die Längsschlitze eingreifender Nocken oder Stifte.In a further development of the basic idea of the invention, a further, preferred possibility of securing the piston-side threaded spindle part against rotation is proposed according to the invention, which consists in the fact that the last threaded spindle part connected in a rotationally fixed manner to the piston is the threaded sleeve with the largest diameter, which is on its Piston applied end carries an outwardly projecting pin which engages in a longitudinal slot of an axially movable sleeve, which in turn is guided via a projecting pin in a longitudinal slot of a sleeve defined in the drive housing on the one hand on the piston-side threaded sleeve and on the other hand in the fixed sleeve. This opens up the possibility of telescopically guiding a longitudinally displaceable sleeve on the piston-side threaded sleeve, which in turn needs to be provided within a fixed sleeve, which need only be provided with longitudinal slots in order to fix these sleeves underneath and ultimately with respect to the piston-side threaded sleeve of the telescopic spindle, and to be precise by means of a form-fitting engagement by means of cams or pins engaging in the longitudinal slots.

Da das antriebsseitige Gewindespindelteil dasjenige mit dem kleinsten Durchmesser ist, sieht die Erfindung zu dessen Antrieb vor, dass das erste, antriebsseitige Gewindespindelteil mit einem scheibenartigen Flansch verbunden ist, an dem ein zu den Gewindespindelteilen konzentrisches Stirnrad angeflanscht ist, und dass der Flansch zwischen der im Antriebsgehäuse feststehenden Hülse und der Bodenwand des Antriebsgehäuses axial festgelegt ist. Die durch den Flansch ermöglichte konzentrische Anordnung eines Stirnrades im Antrieb der Teleskopspindel verringert den Platzbedarf für das Getriebe innerhalb des Antriebsgehäuses.Since the threaded spindle part on the drive side is the one with the smallest diameter, the invention provides for the drive thereof that the first threaded spindle part on the drive side is connected to a disk-like flange which is flanged to a concentric spur gear to the threaded spindle parts, and that the flange is fixed axially between the sleeve fixed in the drive housing and the bottom wall of the drive housing. The concentric arrangement of a spur gear in the drive of the telescopic spindle, which is made possible by the flange, reduces the space required for the gearbox within the drive housing.

Wenn ein Handspritzgerät gemäss der Erfindung mit einer zylindrischen Aufnahme für in einer Folienumhüllung abgepackte plastische Massen versehen sein soll, wird das Antriebsgehäuse samt Teleskopspindel- Kolbenantrieb mit der zylindrischen Aufnahme lösbar, zB über einen Bajonettverschluss, verbunden.If a hand-held spraying device according to the invention is to be provided with a cylindrical receptacle for plastic masses packaged in a film envelope, the drive housing together with the telescopic spindle piston drive is detachably connected to the cylindrical receptacle, for example via a bayonet catch.

Gemäss der weiteren Erfindung wird hierzu die im Antriebsgehäuse festgelegte Hülse mit ihrem freien Ende mit einem Ringteil versehen, das aussen mit einem Gewinde zum Aufschrauben der hülsenartigen Aufnahme für die plastische Masse versehen ist. Damit wird diese Hülse zum vorkragenden Bestandteil des Antriebsgehäuses, das zusammen mit dem Breitenmass des Gehäuses die ineinandergeschachtelten Gewindespindelteile aufnimmt, wenn der Kolben in rückwärtiger Endstellung ist.According to the further invention, the sleeve fixed in the drive housing is provided with its free end with an annular part which is provided on the outside with a thread for screwing on the sleeve-like receptacle for the plastic mass. This sleeve thus becomes a projecting part of the drive housing which, together with the width of the housing, receives the nested threaded spindle parts when the piston is in the rear end position.

In der Zeichnung ist das bevorzugte Ausführungsbeispiel des Handspritzgerätes gemäss der Erfindung dargestellt, und zwar zeigen

  • Fig. 1 einen senkrechten Schnitt durch das in Gebrauchslage befindliche Handspritzgerät mit voll ausgefahrener Teleskop-Gewindespindel, und
  • Fig. 2 einen Schnitt nach der Linie II-II.
In the drawing, the preferred embodiment of the hand-held spray device according to the invention is shown, namely show
  • Fig. 1 shows a vertical section through the hand-held spraying device in the position of use with the telescopic threaded spindle fully extended, and
  • Fig. 2 shows a section along the line II-II.

Das Gerät hat eine zylindrische Aufnahme 1 zum Einfüllen einer plastischen Masse, die in einer Folienumhüllung verpackt ist und lösbar mit dem Antriebsgehäuse 2 verbunden ist. Das Vorderende der Aufnahme 1 ist durch eine Ringscheibe 3 zur Aufnahme einer Spritztülle (nicht dargestellt) teilweise verschlossen.The device has a cylindrical receptacle 1 for filling a plastic mass, which ver in a film envelope is packed and is detachably connected to the drive housing 2. The front end of the receptacle 1 is partially closed by an annular disk 3 for receiving a spray nozzle (not shown).

Zum Hin- und Herbewegen des Kolbens 4 dient eine mehrteilige Teleskop-Gewindespindel 5, deren angetriebenes erstes Gewindespindelteil 5a innerhalb des Antriebsgehäuses 2 axial festgelegt ist, wie noch erläutert wird. Das Gewindespindelteil 5a ist mit einem Gewindekopf 7 versehen, der in das Innengewinde des zweiten, hülsenartigen Gewindespindelteils 5c eingreift. Auch diese Gewindehülse 5c hat einen verdickten Gewindekopf 8, der in das Innengewinde der letzten Gewindehülse 5d grössten Durchmessers eingreift, an der der Kolben 4 befestigt ist. Die Gewindehülsen 5c und 5d hintergreifen mit jeweils einem nach innen vorspringenden Ringbund 5c' bzw 5d' den verdickten Aussengewindekopf 7 bzw 8 des benachbarten Gewindespindelteils kleinerer Dicke, um das stufenweise Auseinanderfahren der Teleskopspindel 5 zu begrenzen und durch Anschlag eine Drehbewegung auf das Gewindespindelteil grösseren Durchmessers zu ermöglichen, wie es im Prinzip bei Teleskopspindeln bekannt ist.A multi-part telescopic threaded spindle 5 is used to move the piston 4 back and forth, the driven first threaded spindle part 5 a of which is axially fixed within the drive housing 2, as will be explained below. The threaded spindle part 5a is provided with a threaded head 7 which engages in the internal thread of the second, sleeve-like threaded spindle part 5c. This threaded sleeve 5c also has a thickened threaded head 8, which engages in the internal thread of the last threaded sleeve 5d of the largest diameter to which the piston 4 is fastened. The threaded sleeves 5c and 5d, each with an inwardly projecting ring collar 5c 'or 5d', engage behind the thickened external thread head 7 or 8 of the adjacent threaded spindle part of smaller thickness, in order to limit the gradual moving apart of the telescopic spindle 5 and, by means of a stop, cause a rotary movement on the larger diameter threaded part enable, as is known in principle with telescopic spindles.

Die Drehsicherung zum Verhindern des Mitdrehens des Kolbens 4 bzw der letzten Gewindehülse 5d insbesondere beim Einziehen der Teleskop-Gewindespindel 5 (weil dann der Kolben 4 nicht über Reibungsschluss von der auszupressenden plastischen Masse festgehalten wird) besteht darin, dass die Teleskop-Gewindespindel 5 auf einem Teil ihrer ausgefahrenen Länge von zwei relativ zueinander beweglichen Hülsen 9 und 10 umgeben ist, von denen die Hülse 9 axialbeweglich ist und einerseits auf der äusseren Mantelfläche der Gewindehülse 5d und andererseits in der inneren Mantelfläche der mit dem Gehäuse 2 über Schrauben 11 fest verbundenen Hülse 10 geführt ist. Die beiden Hülsen 9 und 10 haben Längsschlitze 9a und 10a. In den Schlitz 9a der beweglichen Hülse 9 greift ein Stift 12 ein, der an dem dem Kolben 4 angewandten Innenbund 5d' befestigt ist und die Gewindehülse 5d am Mitdrehen hindert unter der Voraussetzung, dass die Hülse 9 sich nicht drehen kann.The anti-rotation device to prevent the piston 4 or the last threaded sleeve 5d from rotating, in particular when the telescopic threaded spindle 5 is drawn in (because then the piston 4 is not held in place by the plastic mass to be pressed out by frictional engagement), consists in the telescopic threaded spindle 5 on a Part of its extended length is surrounded by two sleeves 9 and 10 which are movable relative to one another, of which the sleeve 9 is axially movable and on the one hand on the outer lateral surface of the threaded sleeve 5d and on the other hand in the inner lateral surface of the sleeve 10 which is firmly connected to the housing 2 via screws 11 is led. The two sleeves 9 and 10 have longitudinal slots 9a and 10a. A pin 12 engages in the slot 9a of the movable sleeve 9, which pin is fastened to the inner collar 5d 'applied to the piston 4 and the threaded sleeve 5d to rotate with it prevents on the condition that the sleeve 9 can not rotate.

Dies wird dadurch erreicht, dass ein nach aussen ragender Stift 13 am rückwärtigen Ende der Hülse 9 in den Schlitz 10a der feststehenden Hülse 10 eingreift.This is achieved in that an outwardly projecting pin 13 engages in the slot 10a of the fixed sleeve 10 at the rear end of the sleeve 9.

Zum Antrieb des ersten Gewindespindelteils 5a ist dieses mit einem scheibenartigen Flansch 14 verbunden, an dem ein Stirnrad 15 angeflanscht ist, das somit konzentrisch zu den Gewindespindelteilen 5a, 5c und 5d platzsparend angeordnet ist. Der scheibenartige Flansch 14 hat einen mittleren Dorn 14a, der in eine Sackbohrung 23 des Gewindespindelteils 5a eingreift. Zwischen dem Dorn 14a und dem Gewindespindelteil 5a ist die Verbindung sowohl drehfest als auch unverschieblich, was nicht näher dargestellt ist. Der Dorn 14a kann beispielsweise in der Sackbohrung 23 verklebt, eingepresst oder verschweisst sein. Da sich nun der scheibenförmige Flansch 14 einerseits an der Gehäusewand 2a und andererseits über einen Ringvorsprung 14b an der feststehenden Hülse 10 abstützt, ist auch das Gewindespindelteil 5a axial gesichert. Der durch die Gehäusewand 2a hindurchragende Teil des mittleren Dornes 14a hat einen Querschlitz 14c zum Ansetzen eines Schraubenziehers, um die Teleskop-Gewindespindel 5 unter Umständen auch von Hand bewegen zu können, beispielsweise um Verklemmungen zu lösen.To drive the first threaded spindle part 5a, it is connected to a disk-like flange 14 to which a spur gear 15 is flanged, which is thus arranged concentrically with the threaded spindle parts 5a, 5c and 5d in a space-saving manner. The disk-like flange 14 has a central mandrel 14a which engages in a blind bore 23 of the threaded spindle part 5a. The connection between the mandrel 14a and the threaded spindle part 5a is both non-rotatable and immovable, which is not shown in more detail. The mandrel 14a can, for example, be glued, pressed or welded in the blind bore 23. Since the disk-shaped flange 14 is now supported on the one hand on the housing wall 2a and on the other hand via an annular projection 14b on the fixed sleeve 10, the threaded spindle part 5a is also axially secured. The part of the central mandrel 14a projecting through the housing wall 2a has a transverse slot 14c for attaching a screwdriver in order to be able to move the telescopic threaded spindle 5 under certain circumstances by hand, for example in order to loosen jams.

Wie aus Fig. 1 und 2 hervorgeht, ist das Gehäuse 2 topfartig gestaltet und durch eine eingesetzte Scheibe 2b verschlossen, die durch drei Schrauben 16 fixiert ist. In den nach unten ausladenden Teil der Scheibe 2b ist ein Lagergehäuse 17 eines Handgriffes 18 eingelassen und durch drei Schrauben 19 fixiert, aus dem eine Antriebswelle 20 herausgeführt ist, die von einem innerhalb des Handgriffes 18 befindlichen, nicht dargestellten Elektromotor angetrieben ist.1 and 2, the housing 2 is pot-shaped and closed by an inserted disc 2b which is fixed by three screws 16. A bearing housing 17 of a handle 18 is embedded in the downwardly projecting part of the disk 2b and fixed by three screws 19, from which a drive shaft 20 is guided, which is driven by an electric motor (not shown) located within the handle 18.

Der Handgriff 18 kann auch einen aufladbaren Akkumulator zur Stromversorgung des Elektromotors aufnehmen. Mit der Antriebswelle 20 ist ein Stirnrad 21 drehfest verbunden, das mit dem Stirnrad 15 im Eingriff ist.The handle 18 can also accommodate a rechargeable battery for powering the electric motor. A spur gear 21 is rotatably connected to the drive shaft 20 and engages with the spur gear 15.

Die im Antriebsgehäuse 2 festgelegte Hülse 10 ist an ihrem freien Ende mit einem Ringteil 22 versehen, das aussen mit einem Gewinde, vorzugsweise einem Bajonettgewinde 22a versehen ist, über das die hülsenartige Aufnahme 1 für die plastische Masse mit dem Antriebsgehäuse 2 verbunden werden kann, da die feststehende Hülse 10 integrierter Bestandteil des Antriebsgehäuses 2, 2b ist und aufgrund ihres grossen Durchmessers in der Lage ist, die Gewindespindelteile ineinandergeschachtelt aufzunehmen, wenn der Kolben 4 in seiner rückwärtigen Lage 4' ist.The sleeve 10 fixed in the drive housing 2 is provided at its free end with an annular part 22, which is provided on the outside with a thread, preferably a bayonet thread 22a, via which the sleeve-like receptacle 1 for the plastic compound can be connected to the drive housing 2, since the fixed sleeve 10 is an integral part of the drive housing 2, 2b and, due to its large diameter, is able to receive the threaded spindle parts nested when the piston 4 is in its rearward position 4 '.

Claims (7)

1. Motorisch angetriebenes Handspritzgerät zum Verarbeiten von plastischen Massen, zB Dichtungsmassen, Klebstoffen, Kitten oder dergleichen, mit einer Aufnahme für die plastische Masse und einem über die Länge der Aufnahme hin- und herverstellbaren Kolben, dessen motorischer Antrieb in dem den Handgriff tragenden Antriebsgehäuse angeordnet ist, dadurch gekennzeichnet, dass der Antrieb des Kolbens (4) aus mindestens einer mehrteiligen Teleskop- Gewindespindel (5) besteht, deren angetriebene erste Gewindespindel (5a) in dem Antriebsgehäuse axial festgelegt ist und eine derartige Länge hat, dass die übrigen Gewindespindeln (5c, 5d) in Rückzugslage des Kolbens ineinandergeschachtelt Platz finden, und dass das letzte, mit dem Kolben drehfest verbundene Gewindespindelteil (5d) auf dem gesamten Kolbenweg gegen Mitdrehen gesichert ist.1. Motor-driven hand-held spray gun for processing plastic masses, for example sealants, adhesives, putties or the like, with a receptacle for the plastic mass and a piston that can be moved back and forth over the length of the receptacle, the motor drive of which is arranged in the drive housing carrying the handle , characterized in that the drive of the piston (4) consists of at least one multi-part telescopic threaded spindle (5), the driven first threaded spindle (5a) of which is axially fixed in the drive housing and has a length such that the remaining threaded spindles (5c , 5d) nested in the retracted position of the piston, and that the last threaded spindle part (5d) which is non-rotatably connected to the piston is secured against turning along the entire piston path. 2. Handspritzgerät nach Anspruch 1, gekennzeichnet durch eine eine zentrale Teleskop-Gewindespindel umgebende einerseits am Kolben und andererseits im Antriebsgehäuse befestigte, zentrisch zur Teleskop-Gewindespindel angeordnete teleskopartige Führungsstange mit unrundem Querschnitt der Stangenglieder als Drehsicherung für den Kolben und damit für das letzte Gewindespindelteil.2. Hand-held spraying device according to claim 1, characterized by a central telescopic threaded spindle surrounding on the one hand on the piston and on the other hand in the drive housing, arranged centrally to the telescopic threaded spindle, arranged telescopic guide rod with a non-circular cross-section of the rod members as a rotation lock for the piston and thus for the last threaded spindle part. 3. Handspritzgerät nach Anspruch 1, gekennzeichnet durch mehr als eine exzentrisch am Kolben angreifende, gemeinsam angetriebene Teleskop-Gewindespindel als Drehsicherung für den Kolben und damit für die jeweils letzten Gewindespindelteile.3. Hand-held spray device according to claim 1, characterized by more than one eccentrically acting on the piston, jointly driven telescopic threaded spindle as a rotation lock for the piston and thus for the last threaded spindle parts. 4. Handspritzgerät nach Anspruch 1, dadurch gekennzeichnet, dass das letzte, mit dem Kolben (4) drehfest verbundene Gewindespindelteil (5d) die Gewindehülse mit dem grössten Durchmesser ist, die an ihrem dem Kolben abgewandten Ende (5d') einen nach aussen vorspringenden Stift (12) trägt, der in einen Längsschlitz (9a) einer axial beweglichen Hülse (9) eingreift, die ihrerseits über einen vorspringenden Stift (13) in einen Längsschlitz (10a) einer im Antriebsgehäuse (2, 2b) festgelegten Hülse (10) eingreift, und dass die axial bewegliche Hülse einerseits auf der kolbenseitigen Gewindehülse (5d) und andererseits in der feststehenden Hülse (10) geführt ist.4. Hand-held spray device according to claim 1, characterized in that the last, with the piston (4) rotationally connected threaded spindle part (5d) is the threaded sleeve with the largest diameter, the end facing away from the piston (5d ') an outwardly projecting pin (12) which engages in a longitudinal slot (9a) of an axially movable sleeve (9) which in turn engages via a projecting pin (13) in a longitudinal slot (10a) of a sleeve (10) fixed in the drive housing (2, 2b) , and that the axially movable sleeve is guided on the one hand on the piston-side threaded sleeve (5d) and on the other hand in the fixed sleeve (10). 5. Handspritzgerät nach Anspruch 4, dadurch gekennzeichnet, dass das erste, antriebsseitige Gewindespindelteil (5a) mit einem scheibenartigen Flansch (14) verbunden ist, an dem ein zu den Gewindespindelteilen (5a, 5c, 5d) konzentrisches Stirnrad (15) angeflanscht ist, und dass der Flansch zwischen der im Antriebsgehäuse (2, 2b) festgelegten Hülse (10) und der Bodenwand (2a) des Antriebsgehäuses axial festgelegt ist.5. Hand-held spray device according to claim 4, characterized in that the first drive-side threaded spindle part (5a) is connected to a disk-like flange (14) on which a spur gear (15) concentric with the threaded spindle parts (5a, 5c, 5d) is flanged. and that the flange is axially fixed between the sleeve (10) fixed in the drive housing (2, 2b) and the bottom wall (2a) of the drive housing. 6. Handspritzgerät nach Anspruch 2 oder 3 oder 4, mit einer zylindrischen Aufnahme für in einer Folienumhüllung abgepackte plastische Massen, dadurch gekennzeichnet, dass das Antriebsgehäuse samt Teleskopspindel-Kolbenantrieb mit der zylindrischen Aufnahme lösbar verbunden ist.6. Hand-held spray device according to claim 2 or 3 or 4, with a cylindrical receptacle for plastic masses packaged in a film covering, characterized in that the drive housing together with the telescopic spindle piston drive is detachably connected to the cylindrical receptacle. 7. Handspritzgerät nach Anspruch 4 und 6, dadurch gekennzeichnet, dass die im Antriebsgehäuse (2, 2b) festgelegte Hülse (10) an ihrem freien Ende mit einem Ringteil (22) versehen ist, das aussen mit einem Gewinde (22a) zum Aufschrauben der hülsenartigen Aufnahme (1) für die plastische Masse versehen ist.7. Hand-held spray device according to claim 4 and 6, characterized in that the sleeve (10) fixed in the drive housing (2, 2b) is provided at its free end with a ring part (22) which has a thread (22a) on the outside for screwing on the sleeve-like receptacle (1) is provided for the plastic mass.
EP85810371A 1984-08-25 1985-08-15 Motor-driven hand spraying device for processing plastic compositions Expired EP0172788B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810371T ATE34315T1 (en) 1984-08-25 1985-08-15 MOTOR-DRIVEN HAND SPRAYING DEVICE FOR PROCESSING PLASTIC MASS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19843431291 DE3431291A1 (en) 1984-08-25 1984-08-25 Motor-driven hand spray device for processing plastics compositions
DE3431291 1984-08-25
DE3512967 1985-04-11
DE19853512967 DE3512967A1 (en) 1985-04-11 1985-04-11 Motor-driven hand spray unit for processing plastic compositions

Publications (2)

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EP0172788A1 true EP0172788A1 (en) 1986-02-26
EP0172788B1 EP0172788B1 (en) 1988-05-18

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EP85810371A Expired EP0172788B1 (en) 1984-08-25 1985-08-15 Motor-driven hand spraying device for processing plastic compositions

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US (1) US4653675A (en)
EP (1) EP0172788B1 (en)
DE (1) DE3562715D1 (en)

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GB2271391A (en) * 1992-10-12 1994-04-13 Hornche Trading Co Ltd Automatic grease dispenser.
WO1995022411A1 (en) * 1994-02-16 1995-08-24 Stefania Ceron Gun extruder
CN103706535A (en) * 2012-09-29 2014-04-09 博世电动工具（中国）有限公司 Glue spraying gun
CN108654947A (en) * 2018-05-04 2018-10-16 苏州诺登德智能科技有限公司 A kind of driven type gluing device
DE102020110743A1 (en) 2020-04-21 2021-10-21 Atlas Copco Ias Gmbh Device for dosing viscous material

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US6926177B1 (en) * 2000-03-31 2005-08-09 William M. Scott Device for dispensing substance from a cartridge
EP1213529B1 (en) * 2000-12-07 2003-09-10 perma-tec GmbH & Co. KG Lubricant dispenser
US6817492B1 (en) * 2003-03-19 2004-11-16 Timothy W. Smith Cartridge dispenser extension and extrusion system
JP4511913B2 (en) * 2004-12-08 2010-07-28 本田技研工業株式会社 Free state diameter setting method of metal ring for metal belt
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Cited By (6)

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GB2271391A (en) * 1992-10-12 1994-04-13 Hornche Trading Co Ltd Automatic grease dispenser.
GB2271391B (en) * 1992-10-12 1995-08-02 Hornche Trading Co Ltd Automatic grease dispenser
WO1995022411A1 (en) * 1994-02-16 1995-08-24 Stefania Ceron Gun extruder
CN103706535A (en) * 2012-09-29 2014-04-09 博世电动工具（中国）有限公司 Glue spraying gun
CN108654947A (en) * 2018-05-04 2018-10-16 苏州诺登德智能科技有限公司 A kind of driven type gluing device
DE102020110743A1 (en) 2020-04-21 2021-10-21 Atlas Copco Ias Gmbh Device for dosing viscous material

Also Published As

Publication number Publication date
US4653675A (en) 1987-03-31
EP0172788B1 (en) 1988-05-18
DE3562715D1 (en) 1988-06-23

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