EP3823791B1 - Compressed-air-operated expulsion device - Google Patents

Compressed-air-operated expulsion device Download PDF

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Publication number
EP3823791B1
EP3823791B1 EP19752426.7A EP19752426A EP3823791B1 EP 3823791 B1 EP3823791 B1 EP 3823791B1 EP 19752426 A EP19752426 A EP 19752426A EP 3823791 B1 EP3823791 B1 EP 3823791B1
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EP
European Patent Office
Prior art keywords
compression chamber
compressed air
filling
drive
piston
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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.)
Active
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EP19752426.7A
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German (de)
French (fr)
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EP3823791C0 (en
EP3823791A1 (en
Inventor
Werner Ruecklinger
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Prebena Wilfried Bornemann GmbH and Co KG
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Prebena Wilfried Bornemann GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
    • B25C1/042—Main valve and main cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder
    • B25C1/043—Trigger valve and trigger mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • the present invention relates to a compressed air-operated ejection device for ejecting objects or fluid substances from a reservoir by means of a drive piston that can be acted upon by a gas volume that can be compressed in a compression chamber, the drive piston being provided with a drive device for compressing the gas volume and with a release device for expanding the compressed gas volume .
  • Compressed air-operated ejection devices of the type mentioned at the outset use the gas volume compressed by the upward movement of the drive piston as a gas pressure spring to generate an ejection force that acts on the objects to be ejected.
  • a driving device according to the preamble of claim 1 is from US2018/126527 A1 known and another expelling device is from EP 2 243 600 B1 known in which the compression chamber is filled with a gas volume that is constant over the life of the expulsion device. Therefore, such ejection devices are filled once with a volume of gas during factory assembly, which has a filling pressure that is designed according to the piston geometry for the desired ejection force and is usually in the order of about 8 bar.
  • the associated temperature changes in the compressed air stored in the compression chamber lead to the formation of condensate, since the water vapor contained in the compressed air decreases when the compressed air cools or when the saturation vapor pressure is increased due to the compression of the compressed air is exceeded, condenses out.
  • the present invention is therefore based on the object of proposing a compressed air-operated ejection device which has a comparatively longer service life and in particular enables the ejection device to be repaired by engaging in the compression chamber.
  • the driving device according to the invention has the features of claim 1.
  • the compression chamber is equipped with a venting device for temporary venting Compression chamber and provided with a filling device for filling the vented compression chamber with compressed air.
  • Equipping the compression chamber with a venting device and a filling device enables the user to empty the compression chamber at a time that he himself determines and, if necessary, to refill it with compressed air.
  • the compressed air volume contained in the compression chamber can be exchanged, for example depending on a defined number of expulsion processes, in order to dispose of condensate that has formed in the compression chamber in the meantime through the venting device.
  • the compressed air contained in the compression chamber can easily be replaced during the life cycle of the expulsion device due to the design of the expulsion device according to the invention, repairs can also be carried out on the expulsion device that require intervention in the compression chamber, such as replacing the piston with the drive piston associated ejector ram or an exchange of the driving piston itself. Re-commissioning the ejector is easily possible because after a repair or replacement of device components by means of the filling device, the compression chamber can be refilled with compressed air.
  • the compression device or the filling device is provided with a pressure indicator that allows the operator to end the filling process when the desired filling pressure in the compression comb is displayed.
  • the compression chamber can also be provided with a preferably adjustable pressure relief valve to end the filling process.
  • a re-filling of the compression chamber of the expulsion device with compressed air can be done particularly easily because the Filling device has a connection device connected to the compression chamber for connection to an in particular device-independent compressed air source.
  • a compressed air source can in particular be a mains connection for connecting the compression chamber of the expulsion device to a mains-dependent compressed air source or also a connection device which enables connection to a mobile compressor device.
  • the compressed air source is configured as a compressed air cartridge connected to the connection device in an exchangeable manner, since this allows the compression chamber to be filled with compressed air independently of the mains without having to provide a compressed air compressor. Rather, a compressed air cylinder that can easily be carried along by the user during operation of the expulsion device can be used, so that in particular the logistical outlay for providing the possibility of refilling the compression chamber of the expulsion device is low.
  • the compressed air cylinder can be filled with high filling pressure to fill the compression chamber, particularly if a compressed air cylinder is used as the compressed air source, and can therefore be designed to be particularly small and therefore easy to carry.
  • the drive device has a rotary drive element which is in engagement with a linear drive element which is designed as an ejector ram, acts on the drive piston and is accommodated in a linear guide device, the drive device being detachably connected to a cylinder unit forming the compression chamber via a piston stop device.
  • the compression chamber can be opened not only for repair purposes and, after the compression chamber has been closed again, operation can resume the expelling device.
  • one component of the ejection device namely the piston stop device, can not only serve according to its original purpose for defining a stop for the ejection piston, but also as a connecting device between the linear guide device and the compression chamber.
  • expulsion device 10 which, on a housing 11 which is also designed here as a support structure and is provided with a handle 12, has as essential components an expulsion unit 13 and a magazine device 15 serving as a reservoir for objects 14 to be expelled, which is attached to an expulsion mouthpiece 16 of the Drive-out unit 13 is connected.
  • the ejection unit 13 has a driving piston 18 which is arranged in a cylinder unit 17 and is provided with an ejection ram 19 which is guided in a linear guide device 20 which at the same time forms a cylinder base 22 of the cylinder unit 17 which is provided with a ram opening 21 .
  • a piston stop device 24 is used, which has a lower stop position of the in 2 at its top dead center shown drive piston 18 forms.
  • a drive device 26 is connected to the linear guide device 20 of the expulsion unit 13, which comprises a rotary drive member 27 and a linear drive member 28 and which serves to move the driving piston 18 against the following a transfer of the driving piston 18 in the in the 2 and 3 bias shown top dead center compressed air volume.
  • the linear drive member 28 is formed in the illustrated embodiment by a lower part of the ejector ram 19, which is in an upward movement of the drive piston 18 in engagement with the rotary drive member 27.
  • the rotary drive member 27 has drivers designed as pins 29 which interact with teeth 30 designed on the linear drive member 28 .
  • the rotary drive member 27 is driven by a, as in 2 shown, driven by an electric motor 31 intermediate gear 32, wherein the power supply of the electric motor 31, a battery 33 is provided.
  • the rotary drive member 27 is not provided with pins 29 over its entire pitch circle 34, but has a segment 35 on its pitch circle 34, along which no engagement between the pins 29 and the toothing 30 of the linear drive member 28 takes place during a counterclockwise rotation .
  • a downward movement of the drive piston 18, starting from its top dead center, up to the stop against the piston stop device 24 is possible, with the result that the decompression of the volume of air compressed above the drive piston 18 in the compression chamber 23 takes place, the drive piston 18 accelerates downwards and a corresponding ejection force F via the ejection ram 19 acts on an object 14 arranged in the expulsion mouthpiece 16 .
  • the expulsion device 10 has a trigger 36 ( 2 ) on that with an in 2 pawl, not shown in detail, which the way of the ejector ram 19 from the in 3 shown position blocked down until the trigger 36 is actuated.
  • the compression chamber 23 is provided with a ventilation device 37, which in the present case can be actuated manually via a valve device 38 and releases a ventilation opening 40 formed in a chamber wall 39 of the compression chamber 23 for compressed air ventilation of the compression chamber 23.
  • a ventilation device 37 which in the present case can be actuated manually via a valve device 38 and releases a ventilation opening 40 formed in a chamber wall 39 of the compression chamber 23 for compressed air ventilation of the compression chamber 23.
  • the filling device 41 has a connection device 43 which is connected to the compression chamber 23 via a filling opening 42 and to which a compressed air cylinder 45 can be connected in an exchangeable manner via a filling valve 44 .
  • the compression chamber 23 is provided with a pressure indicator 47 for monitoring the filling pressure in the compression chamber 23 .
  • connection device 43 is provided with a pressure reducing device 46, so that the compressed air cylinder 45, which preferably has a filling pressure of 300 bar, can be connected via the filling valve 44 and the pressure reducing device 46, which is preferably designed to be adjustable, is suitable for filling the compression chamber 23 A filling pressure of about 23 bar can be set.
  • the expulsion device 10 or the housing 11 of the expulsion device 10 is designed in the present case in such a way that operation of the expulsion device 10, which requires the battery 33 to be connected to the electric motor 31, is only possible if no compressed air cylinder 45 is available Refilling of the compression chamber 23 is connected to the filling valve 44, since the space required for the arrangement of the battery 33 on the housing 11 is blocked by the compressed air cylinder 45.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Compressor (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Coating Apparatus (AREA)

Description

Die vorliegende Erfindung betrifft eine druckluftbetriebene Austreibvorrichtung zum Austreiben von Gegenständen oder fluiden Stoffen aus einem Reservoir mittels eines mit einem in einer Kompressionskammer komprimierbaren Gasvolumen beaufschlagbaren Treibkolbens, wobei der Treibkolben zur Kompression des Gasvolumens mit einer Antriebseinrichtung und zur Entspannung des komprimierten Gasvolumens mit einer Auslöseeinrichtung versehen ist.The present invention relates to a compressed air-operated ejection device for ejecting objects or fluid substances from a reservoir by means of a drive piston that can be acted upon by a gas volume that can be compressed in a compression chamber, the drive piston being provided with a drive device for compressing the gas volume and with a release device for expanding the compressed gas volume .

Druckluftbetriebene Austreibvorrichtungen der eingangs genannten Art nutzen das durch die Aufwärtsbewegung des Treibkolbens komprimierte Gasvolumen als Gasdruckfeder zur Erzeugung einer auf die auszutreibenden Gegenstände wirkenden Austreibkraft. Eine derartige Austreibvorrichtung gemäß dem Oberbegriff des Anspruchs 1 ist aus der US2018/126527 A1 bekannt und eine weitere Austreibvorrichtung ist aus der EP 2 243 600 B1 bekannt, bei der die Kompressionskammer mit einem Gasvolumen befüllt ist, das über die Lebensdauer der Austreibvorrichtung konstant ist. Daher werden derartige Austreibvorrichtungen bei der werkseitigen Montage einmal mit einem Gasvolumen befüllt, das einen Fülldruck aufweist, der entsprechend der Kolbengeometrie auf die gewünschte Austreibkraft ausgelegt ist und in der Regel in der Größenordnung von ca. 8 bar liegt.Compressed air-operated ejection devices of the type mentioned at the outset use the gas volume compressed by the upward movement of the drive piston as a gas pressure spring to generate an ejection force that acts on the objects to be ejected. Such a driving device according to the preamble of claim 1 is from US2018/126527 A1 known and another expelling device is from EP 2 243 600 B1 known in which the compression chamber is filled with a gas volume that is constant over the life of the expulsion device. Therefore, such ejection devices are filled once with a volume of gas during factory assembly, which has a filling pressure that is designed according to the piston geometry for the desired ejection force and is usually in the order of about 8 bar.

Während der einander abwechselnden Kompressions- und Dekompressionsvorgänge im Betrieb der Austreibvorrichtung kommt es durch die damit verbundenen Temperaturänderungen der in der Kompressionsraum gespeicherten Druckluft zu einer Kondensatbildung, da der in der Druckluft enthaltene Wasserdampf bei Abkühlung der Druckluft, oder auch, wenn durch die Verdichtung der Sättigungsdampfdruck der Druckluft überschritten wird, auskondensiert.During the alternating compression and decompression processes during operation of the expelling device, the associated temperature changes in the compressed air stored in the compression chamber lead to the formation of condensate, since the water vapor contained in the compressed air decreases when the compressed air cools or when the saturation vapor pressure is increased due to the compression of the compressed air is exceeded, condenses out.

Insbesondere aufgrund von Korrosionserscheinungen in der Kompressionskammer, die auf den regelmäßig sauren pH-Wert des Kondensats zurückzuführen sind, kommt es daher nach einer ausreichend hohen Anzahl von Austreibvorgängen zu einem deutlichen Leistungsabfall der druckluftbetriebenen Austreibvorrichtung, wobei aufgrund der Konstruktion der Kompressionskammer eine erneute Befüllung der Kompressionsraums mit Druckluft und somit eine Reparatur der Austreibvorrichtung nicht möglich ist. Ebenso wenig, wie es möglich ist, Geräteschäden aufgrund einer Kondensatbildung zu beheben, ist auch der Austausch von Komponenten der Austreibvorrichtung, der eine Öffnung des Kompressionsraums erforderlich macht, wie beispielsweise der Austausch des mit dem Treibkolben verbundenen Austreibstößels, der wegen des unmittelbaren Kontakts mit den auszutreibenden Gegenständen einem besonderen Verschleiß unterliegt, nicht möglich.In particular due to corrosion phenomena in the compression chamber, which can be attributed to the regularly acidic pH value of the condensate, there is a significant drop in performance of the compressed air-operated ejection device after a sufficiently high number of ejection processes, with the compression chamber having to be refilled due to the design of the compression chamber with compressed air and thus a repair of the expulsion device is not possible. Just as it is not possible to repair equipment damage due to condensation, it is also not possible to replace components of the ejector device, which requires an opening of the compression chamber, such as replacing the ejector ram connected to the driving piston, which due to the direct contact with the objects to be expelled is subject to particular wear and tear, is not possible.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine druckluftbetriebene Austreibvorrichtung vorzuschlagen, die eine vergleichsweise höhere Lebensdauer aufweist und insbesondere eine Reparatur der Austreibvorrichtung mit Eingriff in die Kompressionskammer ermöglicht.The present invention is therefore based on the object of proposing a compressed air-operated ejection device which has a comparatively longer service life and in particular enables the ejection device to be repaired by engaging in the compression chamber.

Zur Lösung dieser Aufgabe weist die erfindungsgemäße Austreibvorrichtung die Merkmale des Anspruchs 1 auf.To solve this problem, the driving device according to the invention has the features of claim 1.

Bei der erfindungsgemäßen Austreibvorrichtung ist die Kompressionskammer mit einer Entlüftungseinrichtung zur temporären Entlüftung der Kompressionskammer und mit einer Befülleinrichtung zur Druckluftbefüllung der entlüfteten Kompressionskammer versehen.In the expulsion device according to the invention, the compression chamber is equipped with a venting device for temporary venting Compression chamber and provided with a filling device for filling the vented compression chamber with compressed air.

Die Ausstattung der Kompressionskammer mit einer Entlüftungseinrichtung und einer Befülleinrichtung ermöglicht es dem Benutzer, die Kompressionskammer zu einem von ihm selbst bestimmten Zeitpunkt zu entleeren und gegebenenfalls neu mit Druckluft zu befüllen. Hierdurch kann also etwa in Abhängigkeit von einer definierten Anzahl von Austreibvorgängen ein Austausch des in der Kompressionskammer enthaltenen Druckluftvolumens erfolgen, um ein zwischenzeitlich in der Kompressionskammer gebildetes Kondensat durch die Entlüftungseinrichtung zu entsorgen.Equipping the compression chamber with a venting device and a filling device enables the user to empty the compression chamber at a time that he himself determines and, if necessary, to refill it with compressed air. As a result, the compressed air volume contained in the compression chamber can be exchanged, for example depending on a defined number of expulsion processes, in order to dispose of condensate that has formed in the compression chamber in the meantime through the venting device.

Da aufgrund der erfindungsgemäßen Ausgestaltung der Austreibvorrichtung ein Austausch der in der Kompressionskammer enthaltenen Druckluft während des Lebenszyklus der Austreibvorrichtung leicht möglich ist, können auch Reparaturen an der Austreibvorrichtung ausgeführt werden, die einen Eingriff in die Kompressionskammer erforderlich machen, wie beispielsweise der Austausch des mit dem Treibkolben verbundenen Austreibstößels oder auch ein Austausch des Treibkolbens selbst. Eine erneute Inbetriebnahme der Austreibvorrichtung ist ohne Weiteres möglich, da nach einer Reparatur bzw. dem Austausch von Gerätekomponenten mittels der Befülleinrichtung eine erneute Druckluftbefüllung der Kompressionskammer erfolgen kann.Since the compressed air contained in the compression chamber can easily be replaced during the life cycle of the expulsion device due to the design of the expulsion device according to the invention, repairs can also be carried out on the expulsion device that require intervention in the compression chamber, such as replacing the piston with the drive piston associated ejector ram or an exchange of the driving piston itself. Re-commissioning the ejector is easily possible because after a repair or replacement of device components by means of the filling device, the compression chamber can be refilled with compressed air.

Vorzugsweise ist die Kompressionseinrichtung oder die Befülleinrichtung mit einer Druckanzeige versehen, die eine Beendigung des Befüllvorgangs durch den Bediener bei Anzeige des gewünschten Fülldrucks in der Kompressionskamm ermöglicht. Auch kann die Kompressionskammer mit einem vorzugsweise einstellbaren Überdruckventil zur Beendigung des Befüllvorgangs versehen sein.Preferably, the compression device or the filling device is provided with a pressure indicator that allows the operator to end the filling process when the desired filling pressure in the compression comb is displayed. The compression chamber can also be provided with a preferably adjustable pressure relief valve to end the filling process.

Eine erneute Befüllung der Kompressionskammer der Austreibvorrichtung mit Druckluft kann insbesondere leicht erfolgen, da die Befülleinrichtung eine mit der Kompressionskammer verbundene Anschlusseinrichtung zum Anschluss an eine insbesondere geräteunabhängige Druckluftquelle aufweist. Bei einer derartigen Druckluftquelle kann es sich insbesondere um einen Netzanschluss zur Verbindung der Kompressionskammer der Austreibvorrichtung mit einer netzabhängigen Druckluftquelle oder auch um eine Anschlusseinrichtung, die den Anschluss an eine mobile Kompressoreinrichtung ermöglicht, handeln.A re-filling of the compression chamber of the expulsion device with compressed air can be done particularly easily because the Filling device has a connection device connected to the compression chamber for connection to an in particular device-independent compressed air source. Such a compressed air source can in particular be a mains connection for connecting the compression chamber of the expulsion device to a mains-dependent compressed air source or also a connection device which enables connection to a mobile compressor device.

Als besonders vorteilhaft erweist es sich, wenn die Druckluftquelle als eine austauschbar mit der Anschlusseinrichtung verbundene Druckluftkartusche ausgebildet ist, da somit eine netzunabhängige Befüllung des Kompressionsraums mit Druckluft möglich ist, ohne dass ein Druckluftkompressor zur Verfügung gestellt werden müsste. Vielmehr kann eine vom Benutzer im Betrieb der Austreibvorrichtung leicht mitführbare Druckluftkartusche verwendet werden, so dass insbesondere der logistische Aufwand zur Bereitstellung der Möglichkeit einer Wiederbefüllung der Kompressionskammer der Austreibvorrichtung gering ist.It proves to be particularly advantageous if the compressed air source is configured as a compressed air cartridge connected to the connection device in an exchangeable manner, since this allows the compression chamber to be filled with compressed air independently of the mains without having to provide a compressed air compressor. Rather, a compressed air cylinder that can easily be carried along by the user during operation of the expulsion device can be used, so that in particular the logistical outlay for providing the possibility of refilling the compression chamber of the expulsion device is low.

Da die Anschlusseinrichtung eine Druckmindereinrichtung aufweist, kann insbesondere in dem Fall, dass als Druckluftquelle eine Druckluftkartusche zum Einsatz kommt, die Druckluftkartusche zur Befüllung der Kompressionskammer mit hohen Fülldruck befüllt und somit besonders klein und daher leicht mitführbar ausgebildet sein.Since the connecting device has a pressure-reducing device, the compressed air cylinder can be filled with high filling pressure to fill the compression chamber, particularly if a compressed air cylinder is used as the compressed air source, and can therefore be designed to be particularly small and therefore easy to carry.

Besonders vorteilhaft ist es, wenn die Antriebseinrichtung ein Rotationsantriebsglied aufweist, das im Eingriff ist mit einem als Austreibstößel ausgebildeten, auf den Treibkolben wirkenden und in einer Linearführungseinrichtung aufgenommenen Linearantriebglied, wobei die Antriebseinrichtung über eine Kolbenanschlageinrichtung lösbar mit einer die Kompressionskammer ausbildenden Zylindereinheit verbunden ist.It is particularly advantageous if the drive device has a rotary drive element which is in engagement with a linear drive element which is designed as an ejector ram, acts on the drive piston and is accommodated in a linear guide device, the drive device being detachably connected to a cylinder unit forming the compression chamber via a piston stop device.

Bei dieser besonderen Ausführungsform der Erfindung kann die Kompressionskammer nicht nur zu Reparaturzwecken geöffnet und nach erneutem Verschließen der Kompressionskammer ein erneuter Betrieb der Austreibvorrichtung erfolgen. Vielmehr kann eine Komponente der Austreibvorrichtung, nämlich die Kolbenanschlageinrichtung nicht nur entsprechend ihrer originären Bestimmung zur Definition eines Anschlags für den Austreibkolben, sondern darüber hinaus auch als Verbindungseinrichtung zwischen der Linearführungseinrichtung und der Kompressionskammer dienen.In this particular embodiment of the invention, the compression chamber can be opened not only for repair purposes and, after the compression chamber has been closed again, operation can resume the expelling device. Rather, one component of the ejection device, namely the piston stop device, can not only serve according to its original purpose for defining a stop for the ejection piston, but also as a connecting device between the linear guide device and the compression chamber.

Nachfolgend wird eine bevorzugte Ausführung der Erfindung anhand der Zeichnung näher erläutert.A preferred embodiment of the invention is explained in more detail below with reference to the drawing.

Es zeigen:

Fig. 1
eine Austreibvorrichtung in Draufsicht;
Fig. 2
die in Fig. 1 dargestellte Austreibvorrichtung in Seitenansicht und Schnittdarstellung;
Fig. 3
die in Fig. 1 dargestellte Austreibvorrichtung in Stirnansicht und Schnittdarstellung;
Fig. 4
eine in der Ansicht der Fig. 2 entsprechende Darstellung der Austreibvorrichtung mit einer an ein Füllventil angeschlossenen Druckluftkartusche.
Show it:
1
an expulsion device in plan view;
2
in the 1 expulsion device shown in side view and sectional view;
3
in the 1 expulsion device shown in front view and sectional view;
4
one in the view of 2 Corresponding representation of the expelling device with a compressed air cylinder connected to a filling valve.

In den Fig. 1 und 2 ist eine Austreibvorrichtung 10 dargestellt, die an einem hier gleichzeitig als Tragstruktur ausgebildeten Gehäuse 11, das mit einem Handgriff 12 versehen ist, als wesentliche Bestandteile eine Austreibeinheit 13 sowie eine als Reservoir für auszutreibende Gegenstände 14 dienende Magazineinrichtung 15 aufweist, die an ein Austreibmundstück 16 der Austreibeinheit 13 angeschlossen ist.In the 1 and 2 An expulsion device 10 is shown which, on a housing 11 which is also designed here as a support structure and is provided with a handle 12, has as essential components an expulsion unit 13 and a magazine device 15 serving as a reservoir for objects 14 to be expelled, which is attached to an expulsion mouthpiece 16 of the Drive-out unit 13 is connected.

Die Austreibeinheit 13 weist einen in einer Zylindereinheit 17 angeordneten Treibkolben 18 auf, der mit einem Austreibstößel 19 versehen ist, welcher in einer Linearführungseinrichtung 20 geführt ist, die gleichzeitig einen mit einer Stößelöffnung 21 versehenen Zylinderboden 22 der Zylindereinheit 17 ausbildet.The ejection unit 13 has a driving piston 18 which is arranged in a cylinder unit 17 and is provided with an ejection ram 19 which is guided in a linear guide device 20 which at the same time forms a cylinder base 22 of the cylinder unit 17 which is provided with a ram opening 21 .

Zur Verbindung der Linearführungseinrichtung 20 mit einem als Kompressionskammer 23 ausgebildeten Teil der Zylindereinheit 17 dient eine Kolbenanschlageinrichtung 24, welche eine untere Anschlagstellung des in Fig. 2 an seinem oberen Totpunkt dargestellten Treibkolben 18 bildet.To connect the linear guide device 20 to a part of the cylinder unit 17 designed as a compression chamber 23, a piston stop device 24 is used, which has a lower stop position of the in 2 at its top dead center shown drive piston 18 forms.

Wie insbesondere in Fig. 3 dargestellt, ist an der Linearführungseinrichtung 20 der Austreibeinheit 13 eine Antriebseinrichtung 26 angeschlossen, die ein Rotationsantriebsglied 27 sowie ein Linearantriebsglied 28 umfasst und die dazu dient, den Treibkolben 18 gegen das in Folge einer Überführung des Treibkolbens 18 in den in den Fig. 2 und 3 dargestellten oberen Totpunkt komprimierte Luftvolumen vorzuspannen. Wie Fig. 3 zeigt, ist das Linearantriebsglied 28 bei dem dargestellten Ausführungsbeispiel durch einen unteren Teil des Austreibstößels 19 ausgebildet, der sich bei einer Aufwärtsbewegung des Treibkolbens 18 im Eingriff mit dem Rotationsantriebsglied 27 befindet. Hierzu weist das Rotationsantriebsglied 27 als Pins 29 ausgebildete Mitnehmer auf, die mit einer am Linearantriebsglied 28 ausgebildeten Verzahnung 30 zusammenwirken. Der Antrieb des Rotationsantriebsglieds 27 erfolgt über ein, wie in Fig. 2 dargestellt, von einem Elektromotor 31 angetriebenes Zwischengetriebe 32, wobei zur Energieversorgung des Elektromotors 31 ein Akku 33 vorgesehen ist.As in particular in 3 shown, a drive device 26 is connected to the linear guide device 20 of the expulsion unit 13, which comprises a rotary drive member 27 and a linear drive member 28 and which serves to move the driving piston 18 against the following a transfer of the driving piston 18 in the in the 2 and 3 bias shown top dead center compressed air volume. How 3 shows, the linear drive member 28 is formed in the illustrated embodiment by a lower part of the ejector ram 19, which is in an upward movement of the drive piston 18 in engagement with the rotary drive member 27. For this purpose, the rotary drive member 27 has drivers designed as pins 29 which interact with teeth 30 designed on the linear drive member 28 . The rotary drive member 27 is driven by a, as in 2 shown, driven by an electric motor 31 intermediate gear 32, wherein the power supply of the electric motor 31, a battery 33 is provided.

Wie Fig. 3 zeigt, ist das Rotationsantriebsglied 27 nicht über seinen gesamten Teilkreis 34 mit Pins 29 versehen, sondern weist an seinem Teilkreis 34 eine Teilstrecke 35 auf, längs der während einer Umdrehung entgegen dem Urzeigersinn kein Eingriff zwischen den Pins 29 und der Verzahnung 30 des Linearantriebsglieds 28 stattfindet. Während dieses Nicht-Eingriffs ist eine Abwärtsbewegung des Treibkolbens 18 ausgehend von seinem oberen Totpunkt bis zum Anschlag gegen die Kolbenanschlageinrichtung 24 möglich, wobei in Folge der dabei stattfindenden Dekompression des oberhalb des Treibkolbens 18 in der Kompressionskammer 23 komprimierten Luftvolumens der Treibkolben 18 nach unten beschleunigt und eine entsprechende Austreibkraft F über den Austreibstößel 19 auf einen im Austreibmundstück 16 angeordneten Gegenstand 14 wirkt.How 3 shows, the rotary drive member 27 is not provided with pins 29 over its entire pitch circle 34, but has a segment 35 on its pitch circle 34, along which no engagement between the pins 29 and the toothing 30 of the linear drive member 28 takes place during a counterclockwise rotation . During this non-engagement, a downward movement of the drive piston 18, starting from its top dead center, up to the stop against the piston stop device 24 is possible, with the result that the decompression of the volume of air compressed above the drive piston 18 in the compression chamber 23 takes place, the drive piston 18 accelerates downwards and a corresponding ejection force F via the ejection ram 19 acts on an object 14 arranged in the expulsion mouthpiece 16 .

Zur definierten Auslösung des Austreibvorgangs weist die Austreibvorrichtung 10 am Handgriff 12 einen Auslöser 36 ( Fig. 2 ) auf, der mit einer in Fig. 2 nicht näher dargestellten Sperrklinke zusammenwirkt, welche den Weg des Austreibstößels 19 aus der in Fig. 3 dargestellten Stellung nach unten bis zur Betätigung des Auslösers 36 blockiert.For the defined triggering of the expulsion process, the expulsion device 10 has a trigger 36 ( 2 ) on that with an in 2 pawl, not shown in detail, which the way of the ejector ram 19 from the in 3 shown position blocked down until the trigger 36 is actuated.

Wie Fig. 3 zeigt, ist die Kompressionskammer 23 mit einer Entlüftungseinrichtung 37 versehen, die im vorliegenden Fall über eine Ventileinrichtung 38 manuell betätigbar und eine in einer Kammerwand 39 der Kompressionskammer 23 ausgebildete Entlüftungsöffnung 40 zur Druckluftentlüftung der Kompressionskammer 23 freigibt. Zur erneuten Befüllung der Kompressionskammer 23 mit einer Druckluftfüllung, derart, dass die Kompressionskammer 23 mit unter einem definierten Luftdruck stehenden Druckluft befüllt wird, die dann durch Überführung des Treibkolbens 18 in den oberen Totpunkt wieder auf den gegenüber dem Befüllungsluftdruck erhöhten Austreibluftdruck erhöht wird, ist an die Kompressionskammer 23 eine insbesondere in Fig. 4 gezeigte Befülleinrichtung 41 angeschlossen. Die Befülleinrichtung 41 weist eine über eine Befüllöffnung 42 mit der Kompressionskammer 23 verbundene Anschlusseinrichtung 43 auf, an die über ein Füllventil 44 eine Druckluftkartusche 45 auswechselbar angeschlossen werden kann. Zur Überwachung des Fülldrucks in der Kompressionskammer 23 ist die Kompressionskammer 23 mit einer Druckanzeige 47 versehen.How 3 shows, the compression chamber 23 is provided with a ventilation device 37, which in the present case can be actuated manually via a valve device 38 and releases a ventilation opening 40 formed in a chamber wall 39 of the compression chamber 23 for compressed air ventilation of the compression chamber 23. For renewed filling of the compression chamber 23 with a compressed air filling in such a way that the compression chamber 23 is filled with compressed air at a defined air pressure, which is then increased again to the expulsion air pressure that is higher than the filling air pressure by transferring the driving piston 18 to the top dead center the compression chamber 23 in particular in 4 filling device 41 shown connected. The filling device 41 has a connection device 43 which is connected to the compression chamber 23 via a filling opening 42 and to which a compressed air cylinder 45 can be connected in an exchangeable manner via a filling valve 44 . The compression chamber 23 is provided with a pressure indicator 47 for monitoring the filling pressure in the compression chamber 23 .

Im vorliegenden Fall ist die Anschlusseinrichtung 43 mit einer Druckmindereinrichtung 46 versehen, so dass die vorzugsweise einen Fülldruck von 300 bar aufweisende Druckluftkartusche 45 über das Füllventil 44 anschließbar ist und die Druckmindereinrichtung 46, die vorzugsweise einstellbar ausgeführt ist, eine für die Befüllung der Kompressionskammer 23 geeignete Einstellung eines Fülldrucks von etwa 23 bar ermöglicht.In the present case, the connection device 43 is provided with a pressure reducing device 46, so that the compressed air cylinder 45, which preferably has a filling pressure of 300 bar, can be connected via the filling valve 44 and the pressure reducing device 46, which is preferably designed to be adjustable, is suitable for filling the compression chamber 23 A filling pressure of about 23 bar can be set.

Wie aus einem Vergleich der Fig. 2 und 4 deutlich wird, ist die Austreibvorrichtung 10 bzw. das Gehäuse 11 der Austreibvorrichtung 10 im vorliegenden Fall so ausgebildet, dass ein Betrieb der Austreibvorrichtung 10, der einen Anschluss des Akkus 33 an den Elektromotor 31 voraussetzt, nur dann möglich ist, wenn keine Druckluftkartusche 45 zur Wiederbefüllung der Kompressionskammer 23 an das Füllventil 44 angeschlossen ist, da der für die Anordnung des Akkus 33 am Gehäuse 11 benötigte Raum durch die Druckluftkartusche 45 blockiert ist.As from a comparison of 2 and 4 As becomes clear, the expulsion device 10 or the housing 11 of the expulsion device 10 is designed in the present case in such a way that operation of the expulsion device 10, which requires the battery 33 to be connected to the electric motor 31, is only possible if no compressed air cylinder 45 is available Refilling of the compression chamber 23 is connected to the filling valve 44, since the space required for the arrangement of the battery 33 on the housing 11 is blocked by the compressed air cylinder 45.

Claims (2)

  1. A pneumatic expulsion device (10) for expelling objects (14) or fluid substances from a reservoir by means of a drive piston (18) which is subjectable to a gas volume compressible in a compression chamber (23), the drive piston (18) being provided with a drive mechanism (26) for compressing the gas volume and with a trigger for expanding the compressed gas volume, the compression chamber (23) being provided with a filling mechanism (41) for filling the vented compression chamber (23) with compressed air, and the filling mechanism (41) having a connection mechanism (43) which is connected to the compression chamber (23) and which serves to be connected to a compressed air cylinder,
    characterized in that
    the compression chamber (23) is provided with a relief mechanism (37) for temporarily venting and emptying the compression chamber (23), the connection mechanism (43) having a pressure reducer (46).
  2. The pneumatic expulsion device according to claim 1,
    characterized in that
    the drive mechanism (26) has a rotation drive member (27) which is engaged to a linear drive member (28) which is an expulsion plunger (19), acts on the drive piston (18), and is accommodated in a linear guide (20), the drive mechanism (26) being detachably connected to a cylinder unit (17), which forms the compression chamber (23), via a piston stopper (24).
EP19752426.7A 2018-07-19 2019-07-18 Compressed-air-operated expulsion device Active EP3823791B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117519.1A DE102018117519A1 (en) 2018-07-19 2018-07-19 Compressed air driven device
PCT/EP2019/069439 WO2020016383A1 (en) 2018-07-19 2019-07-18 Compressed-air-operated expulsion device

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EP3823791A1 EP3823791A1 (en) 2021-05-26
EP3823791B1 true EP3823791B1 (en) 2023-08-30
EP3823791C0 EP3823791C0 (en) 2023-08-30

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EP (1) EP3823791B1 (en)
JP (1) JP7466212B2 (en)
KR (1) KR102535434B1 (en)
CN (1) CN112423937B (en)
AU (1) AU2019306305B2 (en)
CL (1) CL2021000128A1 (en)
DE (1) DE102018117519A1 (en)
ES (1) ES2964090T3 (en)
PL (1) PL3823791T3 (en)
TW (1) TW202012124A (en)
UA (1) UA125202C2 (en)
WO (1) WO2020016383A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220063074A1 (en) * 2020-08-26 2022-03-03 Robert Bosch Gmbh Gas Spring for a Fastener Driving Tool
JP2023064270A (en) * 2021-10-26 2023-05-11 株式会社マキタ driving tool
US20240017387A1 (en) * 2022-07-15 2024-01-18 Kyocera Senco Industrial Tools, Inc. Microfastener driving tool with gas spring

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JP3654099B2 (en) * 1999-12-03 2005-06-02 日立工機株式会社 Driving machine
US6786379B2 (en) * 2002-01-04 2004-09-07 Ilinois Tool Works Inc. Fastener driving tool having pressurized power source
DE202005003422U1 (en) * 2005-03-03 2005-05-19 Prebena Wilfried Bornemann Gmbh & Co. Kg Device for mounting to compressed air appliances has housing with sockets for connection to conventional pressure generator and to pressure cartridge
TWI379746B (en) 2007-10-05 2012-12-21 Senco Brands Inc Fastener driving tool using a gas spring
CN101712148B (en) * 2008-09-30 2013-07-10 株式会社牧田 A pneumatic tool
JP2012187640A (en) * 2009-07-24 2012-10-04 Makita Corp Hammering tool
US9174332B2 (en) * 2012-01-06 2015-11-03 Stanley Fastening Systems, L.P. Fastening tool having an interchangeable power source
WO2015037299A1 (en) * 2013-09-10 2015-03-19 株式会社マキタ Driving tool
EP2851157A1 (en) * 2013-09-19 2015-03-25 HILTI Aktiengesellschaft Driving device with pneumatic storage
US20180036870A1 (en) * 2015-02-26 2018-02-08 Hitachi Koki Co., Ltd. Driving machine
CN113084757A (en) 2015-04-30 2021-07-09 工机控股株式会社 Driving machine
TWI751176B (en) * 2016-08-31 2022-01-01 日商工機控股股份有限公司 Nailer, pressure regulator and nailing unit
CA2985043C (en) 2016-11-09 2023-03-14 Tti (Macao Commercial Offshore) Limited Cylinder assembly for gas spring fastener driver

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DE102018117519A1 (en) 2020-01-23
AU2019306305A1 (en) 2021-01-28
CN112423937B (en) 2024-05-17
WO2020016383A1 (en) 2020-01-23
JP7466212B2 (en) 2024-04-12
ES2964090T3 (en) 2024-04-04
CN112423937A (en) 2021-02-26
JP2021531182A (en) 2021-11-18
AU2019306305B2 (en) 2022-04-14
EP3823791C0 (en) 2023-08-30
UA125202C2 (en) 2022-01-26
CL2021000128A1 (en) 2021-08-20
KR102535434B1 (en) 2023-05-26
TW202012124A (en) 2020-04-01
PL3823791T3 (en) 2024-02-26
US20210308849A1 (en) 2021-10-07
EP3823791A1 (en) 2021-05-26

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