EP1834810A1 - Manual embossing device with compressed air drive - Google Patents

Manual embossing device with compressed air drive Download PDF

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Publication number
EP1834810A1
EP1834810A1 EP07104361A EP07104361A EP1834810A1 EP 1834810 A1 EP1834810 A1 EP 1834810A1 EP 07104361 A EP07104361 A EP 07104361A EP 07104361 A EP07104361 A EP 07104361A EP 1834810 A1 EP1834810 A1 EP 1834810A1
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EP
European Patent Office
Prior art keywords
housing
embossing
sleeve
embossing device
punch
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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.)
Granted
Application number
EP07104361A
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German (de)
French (fr)
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EP1834810B1 (en
Inventor
Claudius Wibmer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Borries Markier-Systeme GmbH
Borries Markier Systeme GmbH
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Borries Markier-Systeme GmbH
Borries Markier Systeme GmbH
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Publication of EP1834810A1 publication Critical patent/EP1834810A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0085—Portable apparatus for manual operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44B—MACHINES, APPARATUS OR TOOLS FOR ARTISTIC WORK, e.g. FOR SCULPTURING, GUILLOCHING, CARVING, BRANDING, INLAYING
    • B44B5/00—Machines or apparatus for embossing decorations or marks, e.g. embossing coins
    • B44B5/0004—Machines or apparatus for embossing decorations or marks, e.g. embossing coins characterised by the movement of the embossing tool(s), or the movement of the work, during the embossing operation
    • B44B5/0019—Rectilinearly moving embossing tools

Definitions

  • the present invention relates to a hand embossing device with compressed air drive according to the preamble of claim 1.
  • Such an embossing device is from the DE 37 39 539 C2 the contents of which are incorporated herein by reference.
  • On its embossing side it comprises an embossing die provided with an embossing mark type, which is interchangeably screwed into a stamping punch, which is displaceably guided in the embossing direction and counter to the embossing direction and which has an impact surface on its rear side opposite the embossing side.
  • the known embossing device has a relative to the embossing punch bolt slidable firing pin, which is spaced in the "sharp" state of the embossing device with its striking surface of the impact surface of the die, wherein the firing pin has a pointing in the opposite direction of the club face, acted upon with compressed air working surface.
  • the firing pin limits on the one hand with its club face an expansion space and on the other hand with its working surface connected to a compressed air source working space.
  • the stamper pin and the firing pin are arranged in a common, hand-engageable tubular housing, which from the firing pin contains expansion space extending to the stamper, which is filled with compressed air in the "sharp" state of the device and by means of a vent valve closed in the rest position of the embossing device can be vented to trigger the embossing process by the vent valve by moving the housing in the direction of embossing on the object surface mounted emboss character type is opened, wherein the expansion space, the working space and the compressed air source are continuously interconnected.
  • a return spring extends, which presses the firing pin at the same pressure in the expansion space and working space in its rear, spaced from the die post basic position.
  • the operation of the known embossing device is as follows. After (one time) connecting the compressed air, air passes through a gap between the firing pin and the tubular housing from the working space in the expansion space and presses the die with the seal of the vent valve against a matching collar on the housing. Since the same pressure prevails in the expansion chamber and in the working space, the return spring forces the firing pin in the rear basic position.
  • the embossing device is thus "sharp".
  • the gap between the firing pin and the housing is very small, and therefore the compressed air can not pass quickly enough past the firing pin in the expansion space of the housing. Consequently, the firing pin is thrown forward against the relatively weak return spring against the die post where it strikes the die post as a hammer, and the total impact energy is transferred to the workpiece via the die to provide the punch cause. Since the blow is completely absorbed by the workpiece, it takes place without any reaction to the operator or their hand guiding the embossing device. After the retraction of the embossing device from the workpiece further air flows through the working space on the firing pin over in the expansion space and pushes the embossing punch again against the head, so that the vent valve is closed. As a result, the same pressure builds up in the expansion chamber as in the working space, and the return spring returns the firing pin back to its rear basic position.
  • the object of the invention is to provide a pneumatic hand-embossing device, which is both easy to handle and safe working allowed.
  • the tubular sleeve closes in its normal position the vent channel, so that in this position no effective blow can be triggered. Only when the embossing device is gripped on the sleeve and moved toward the workpiece, the sleeve is displaced and the vent channel is released, and when the die is pressed against the workpiece, with no significant further movement of the embossing takes place, a shock can be triggered ,
  • the sleeve is in the direction of the stamper against the Sliding spring force. This direction of movement, in which the sleeve has to be moved towards the workpiece in order to release the release lock when the ventilation channel is closed, allows intuitive, fast and safe working.
  • the sleeve can be moved in the direction of the die, the housing must be retained relative to the sleeve. This can be done in several ways. In principle, you can grasp the housing of the embossing device with one hand and push the sleeve with the other hand forward to release the trigger lock. However, it is more practical if the spring force with which the sleeve is biased into its basic position, is smaller than the spring force of the return spring for the stamping punch. In this case, the embossing device is gripped only on the sleeve, and the embossing die is held on the position to be embossed and moved forward the minimum distance that it takes to release the trigger lock. The shock is triggered only when the spring force of the return spring for the stamping punch is overcome. This allows you to position the tool exactly on a workpiece without running the risk of triggering a blow.
  • the hand-embossing device depends from above into the working space by a hanger of the embossing device z. B. is attached to a resilient arm over the working space
  • the embossing device with a suitable choice of the spring force with which the sleeve is biased to its normal position also simply be made 'sharp' that they grabbed on the sleeve and pulled down to the workpiece becomes.
  • the sliding sleeve according to the invention on the circumference of the housing of the embossing device not only reduces the risk of accidents, but allows for smaller hand embossing devices, for example, for engraving stamp with only one character of up to 6 mm digit height, the housing less than 30 mm diameter, also has a more ergonomic handling. So a sleeve with, for example, 35 mm diameter is much better and more comfortable in the hand than a housing with 30 mm diameter or less.
  • FIG. 1a which shows three longitudinal sections through one and the same hand-stamping device with compressed air drive and trigger lock, above (Fig. 1a) in a basic position and in the Center (Fig. 1b) in a position held against a workpiece, wherein the trigger lock is partially shifted, without compressed air abuts the embossing device.
  • FIG. 1C which shows a partially cut away view, the trigger lock in the direction of the die 7 is completely displaced so that triggering of the embossing device is made possible.
  • a simplified version of Figs DE 37 39 539 C2 a known embossing device, comprising a tubular housing 1, a firing pin 2 movable along the axis of the housing 1 therein, which divides the interior of the housing 1 into a working space 4 connectable to a connector 3 with a source of compressed air and an expansion space 5, and one along the Axis of the housing 1 movable stamping punch 6, which extends from a male to be accommodated at one end of the housing 1 stamp 7 along the axis of the housing 1 in the expansion space 5, where he presents the striker 2 an impact surface 8.
  • a return spring 9 drives apart the firing pin 2 and the die 5, namely drives the firing pin 2 in the direction of the rear end of the embossing device, which is provided with the connector 3 and a pivotable bracket 10 for suspending the embossing device, and the embossing punch. 6 forward against an annular Shoulder 11, which is formed in a front portion 1 'of the housing 1, through which the stamping punch bolt 6 extends.
  • the housing 1 is for manufacturing reasons in two parts, but may also be one piece or consist of more than two parts.
  • the shoulder 11 forms on the one hand a stroke limiter for the firing pin 2, which intercepts the kinetic energy of the relatively heavy firing pin 2 when a stroke is not carried out against a workpiece but into space. Only the much lower mass of the die 7 itself is intercepted by a union nut 12 at the very front of the housing 1, which holds the die 7. A screw 13 serves as an anti-rotation for the die 7.
  • the shoulder 11 forms, on the other hand, together with a sealing ring 14 and an annular sealing surface 15 on the stamping punch 6 a vent valve, via which the expansion space 5 is connected to the outside of the housing 1 when the stamping punch 6 is lifted off the sealing ring 14 by the stamp 7 is pressed against a workpiece.
  • the pressurized air in the sharp state of the embossing device in the expansion space 5 can escape through a partial constriction 16 of the embossing die pin 6 and a related, transverse to the axis of the embossing device venting channel 17 to the outside.
  • a screw 18 projects into the constriction 16 radially opposite the ventilation channel 17 in order to produce a stroke limitation for the embossing punch bolt 6 inwards.
  • the venting channel 17 is closed by a tubular sleeve 19 which surrounds the housing 1 with a little play and is so large that an operator the embossing device securely on the Sleeve 19 can grip.
  • the sleeve 19 is displaceable along the axis of the housing 1 and is driven by means of a compression spring 20 resiliently in the direction of the rear end of the embossing device.

Landscapes

  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Confectionery (AREA)
  • Toys (AREA)

Abstract

Hand embossing device comprises a tubular sleeve (19) formed as a handle surrounding a tubular housing (1) which slides along the axis of the housing and is pre-stressed in a base position, in which it closes a ventilating channel (17). The sleeve slides into a position releasing the ventilating channel against the force of a spring. Preferred Features: The sleeve is closed against the force of the spring in the direction of an embossing stamp (7). The device has a restoring spring (9) for an embossing stamp bolt (6) to drive the bolt into a position which closes a ventilating valve (14, 15).

Description

Die vorliegende Erfindung betrifft eine Hand-Prägevorrichtung mit Druckluftantrieb gemäß dem Oberbegriff von Anspruch 1.The present invention relates to a hand embossing device with compressed air drive according to the preamble of claim 1.

So eine Prägevorrichtung ist aus der DE 37 39 539 C2 bekannt, deren Inhalt durch die Bezugnahme hierin eingeschlossen wird. Sie umfasst an ihrer Prägeseite einen mit einer Prägezeichentype versehenen Prägestempel, der auswechselbar in einem Prägestempelbolzen festgeschraubt ist, der in Prägerichtung und entgegen der Prägerichtung verschiebbar geführt ist und der an seiner der Prägeseite entgegengesetzten Rückseite eine Aufprallfläche aufweist. Darüber hinaus weist die bekannte Prägevorrichtung einen gegenüber dem Prägestempelbolzen angeordneten verschiebbaren Schlagbolzen auf, der im "scharfen" Zustand der Prägevorrichtung mit seiner Schlagfläche von der Aufprallfläche des Prägestempelbolzens beabstandet ist, wobei der Schlagbolzen eine in Gegenrichtung der Schlagfläche weisende, mit Druckluft beaufschlagbare Arbeitsfläche aufweist. Der Schlagbolzen begrenzt einerseits mit seiner Schlagfläche einen Expansionsraum und andererseits mit seiner Arbeitsfläche einen mit einer Druckluftquelle verbundenen Arbeitsraum. Der Prägestempelbolzen und der Schlagbolzen sind in einem gemeinsamen, mit der Hand ergreifbaren rohrförmigen Gehäuse angeordnet, das den vom Schlagbolzen bis zum Prägestempel verlaufenden Expansionsraum enthält, der im "scharfen" Zustand der Vorrichtung mit Druckluft befüllt ist und mittels eines im Gehäuse angeordneten, in der Ruhestellung der Prägevorrichtung geschlossenen Entlüftungsventils zum Auslösen des Prägevorgangs entlüftbar ist, indem das Entlüftungsventil durch Verschieben des Gehäuses in Prägerichtung bei auf der Gegenstandsoberfläche aufgesetzter Prägezeichentype geöffnet wird, wobei der Expansionsraum, der Arbeitsraum und die Druckluftquelle kontinuierlich miteinander verbunden sind. Zwischen dem Schlagbolzen und dem Prägestempelbolzen erstreckt sich eine Rückstellfeder, die den Schlagbolzen bei gleichem Druck in Expansionsraum und Arbeitsraum in seine hintere, vom Prägestempelbolzen beabstandete Grundstellung drückt.Such an embossing device is from the DE 37 39 539 C2 the contents of which are incorporated herein by reference. On its embossing side, it comprises an embossing die provided with an embossing mark type, which is interchangeably screwed into a stamping punch, which is displaceably guided in the embossing direction and counter to the embossing direction and which has an impact surface on its rear side opposite the embossing side. In addition, the known embossing device has a relative to the embossing punch bolt slidable firing pin, which is spaced in the "sharp" state of the embossing device with its striking surface of the impact surface of the die, wherein the firing pin has a pointing in the opposite direction of the club face, acted upon with compressed air working surface. The firing pin limits on the one hand with its club face an expansion space and on the other hand with its working surface connected to a compressed air source working space. The stamper pin and the firing pin are arranged in a common, hand-engageable tubular housing, which from the firing pin contains expansion space extending to the stamper, which is filled with compressed air in the "sharp" state of the device and by means of a vent valve closed in the rest position of the embossing device can be vented to trigger the embossing process by the vent valve by moving the housing in the direction of embossing on the object surface mounted emboss character type is opened, wherein the expansion space, the working space and the compressed air source are continuously interconnected. Between the firing pin and the stamping punch a return spring extends, which presses the firing pin at the same pressure in the expansion space and working space in its rear, spaced from the die post basic position.

Die Wirkungsweise der bekannten Prägevorrichtung ist wie folgt. Nach (einmaligem) Anschließen der Druckluft gelangt Luft über einen Spalt zwischen dem Schlagbolzen und dem rohrförmigen Gehäuse aus dem Arbeitsraum in den Expansionsraum und drückt den Prägestempelbolzen mit der Dichtung des Entlüftungsventils gegen einen passenden Bund am Gehäuse. Da im Expansionsraum und im Arbeitsraum gleicher Druck herrscht, zwingt die Rückstellfeder den Schlagbolzen in die hintere Grundstellung. Die Prägevorrichtung ist somit "scharf". Wenn die gesamte Prägevorrichtung zügig mit dem Prägestempel gegen ein Werkstück gedrückt wird, wird der Prägestempelbolzen zurückgeschoben, und der Druck im Expansionsraum kann sehr schnell durch das nunmehr geöffnete Entlüftungsventil und durch seitliche Entlüftungskanäle im Kopf der Prägevorrichtung entweichen. Der Spalt zwischen Schlagbolzen und Gehäuse ist nur sehr klein, und daher kann die Druckluft nicht schnell genug am Schlagbolzen vorbei in den Expansionsraum des Gehäuses gelangen. Folglich wird der Schlagbolzen gegen die verhältnismäßig schwache Rückstellfeder nach vorne gegen den Prägestempelbolzen geschleudert, wo er wie ein Hammer auf den Prägestempelbolzen trifft, und die gesamte Schlagenergie wird über den Prägestempel auf das Werkstück übertragen, um die Stempelung zu bewirken. Da der Schlag vollständig vom Werkstück aufgenommen wird, erfolgt er ohne Rückwirkung auf die Bedienungsperson bzw. deren die Prägevorrichtung führende Hand. Nach dem Rückzug der Prägevorrichtung vom Werkstück strömt weitere Luft durch den Arbeitsraum am Schlagbolzen vorbei in den Expansionsraum und drückt den Prägestempelbolzen wieder gegen den Kopf, so dass das Entlüftungsventil geschlossen wird. Hierdurch baut sich im Expansionsraum derselbe Druck auf wie im Arbeitsraum, und die Rückstellfeder stellt den Schlagbolzen wieder in seine hintere Grundstellung zurück.The operation of the known embossing device is as follows. After (one time) connecting the compressed air, air passes through a gap between the firing pin and the tubular housing from the working space in the expansion space and presses the die with the seal of the vent valve against a matching collar on the housing. Since the same pressure prevails in the expansion chamber and in the working space, the return spring forces the firing pin in the rear basic position. The embossing device is thus "sharp". When the entire embossing device is rapidly pressed against a workpiece with the die, the die post is pushed back and the pressure in the expansion space can escape very quickly through the now open bleed valve and through side venting channels in the head of the embossing device. The gap between the firing pin and the housing is very small, and therefore the compressed air can not pass quickly enough past the firing pin in the expansion space of the housing. Consequently, the firing pin is thrown forward against the relatively weak return spring against the die post where it strikes the die post as a hammer, and the total impact energy is transferred to the workpiece via the die to provide the punch cause. Since the blow is completely absorbed by the workpiece, it takes place without any reaction to the operator or their hand guiding the embossing device. After the retraction of the embossing device from the workpiece further air flows through the working space on the firing pin over in the expansion space and pushes the embossing punch again against the head, so that the vent valve is closed. As a result, the same pressure builds up in the expansion chamber as in the working space, and the return spring returns the firing pin back to its rear basic position.

Indem die Schlagauslösung unmittelbar mit dem Aufsetzen des Prägestempels auf das Werkstück bewirkt wird, kann zügig gearbeitet werden. Jedoch besteht die Gefahr, dass eine Bedienungsperson unbeabsichtigt gegen das Werkzeug stößt, wenn die Prägevorrichtung "scharf" ist, und einen Schlag auslöst, der das berührende Körperteil empfindlich trifft.By the impact triggering is effected directly with the placement of the die on the workpiece, can be worked quickly. However, there is a risk that an operator accidentally hits the tool when the embossing device is "sharp" and triggers a shock that hits the touching body part sensitively.

Aufgabe der Erfindung ist es, eine pneumatische Hand-Prägevorrichtung bereitzustellen, die sowohl gut handhabbar ist als auch sicheres Arbeiten erlaubt.The object of the invention is to provide a pneumatic hand-embossing device, which is both easy to handle and safe working allowed.

Diese Aufgabe wird bei einer gattungsgemäßen Prägevorrichtung durch die kennzeichnenden Merkmale von Anspruch 1 gelöst.This object is achieved in a generic embossing device by the characterizing features of claim 1.

Die rohrförmige Hülse verschließt in ihrer Grundstellung den Entlüftungskanal, so dass in dieser Stellung kein wirksamer Schlag ausgelöst werden kann. Erst wenn die Prägevorrichtung an der Hülse ergriffen und an das Werkstück heran bewegt wird, wird die Hülse verschoben und wird der Entlüftungskanal freigegeben, und wenn der Prägestempel gegen das Werkstück gedrückt wird, wobei keine nennenswerte weitere Bewegung der Prägevorrichtung stattfindet, kann ein Schlag ausgelöst werden.The tubular sleeve closes in its normal position the vent channel, so that in this position no effective blow can be triggered. Only when the embossing device is gripped on the sleeve and moved toward the workpiece, the sleeve is displaced and the vent channel is released, and when the die is pressed against the workpiece, with no significant further movement of the embossing takes place, a shock can be triggered ,

Vorzugsweise ist die Hülse in Richtung auf den Prägestempel entgegen der Federkraft verschiebbar. Diese Bewegungsrichtung, in der die Hülse zum Werkstück hin verschoben werden muss, um die Auslösesperre bei verschlossenem Entlüftungskanal zu lösen, ermöglicht intuitives, schnelles und sicheres Arbeiten.Preferably, the sleeve is in the direction of the stamper against the Sliding spring force. This direction of movement, in which the sleeve has to be moved towards the workpiece in order to release the release lock when the ventilation channel is closed, allows intuitive, fast and safe working.

Damit die Hülse in Richtung auf den Prägestempel verschoben werden kann, muss das Gehäuse relativ zur Hülse zurückgehalten werden. Dies kann auf mehrere Arten geschehen. Prinzipiell kann man das Gehäuse der Prägevorrichtung mit einer Hand ergreifen und die Hülse mit der anderen Hand nach vorne schieben, um die Auslösesperre zu lösen. Praktischer ist es jedoch, wenn die Federkraft, mit der die Hülse in ihre Grundstellung vorgespannt ist, kleiner ist als die Federkraft der Rückstellfeder für den Prägestempelbolzen. In diesem Fall wird die Prägevorrichtung nur an der Hülse ergriffen, und der Prägestempel wird auf die zu prägende Stelle gehalten und die Mindeststrecke nach vorne bewegt, die es braucht, um die Auslösesperre zu lösen. Der Schlag wird erst ausgelöst, wenn auch die Federkraft der Rückstellfeder für den Prägestempelbolzen überwunden wird. Dadurch kann man das Werkzeug exakt auf einem Werkstück positionieren, ohne Gefahr zu laufen, dadurch bereits einen Schlag auszulösen.Thus, the sleeve can be moved in the direction of the die, the housing must be retained relative to the sleeve. This can be done in several ways. In principle, you can grasp the housing of the embossing device with one hand and push the sleeve with the other hand forward to release the trigger lock. However, it is more practical if the spring force with which the sleeve is biased into its basic position, is smaller than the spring force of the return spring for the stamping punch. In this case, the embossing device is gripped only on the sleeve, and the embossing die is held on the position to be embossed and moved forward the minimum distance that it takes to release the trigger lock. The shock is triggered only when the spring force of the return spring for the stamping punch is overcome. This allows you to position the tool exactly on a workpiece without running the risk of triggering a blow.

In einer Anwendung, in der die Hand-Prägevorrichtung von oben in den Arbeitsraum herabhängt, indem ein Aufhänger der Prägevorrichtung z. B. an einem elastischen Ausleger über dem Arbeitsraum befestigt ist, kann die Prägevorrichtung bei geeigneter Wahl der Federkraft, mit der die Hülse in ihre Grundstellung vorgespannt ist, auch einfach dadurch "scharf' gemacht werden, dass sie an der Hülse ergriffen und zum Werkstück herabgezogen wird.In an application in which the hand-embossing device depends from above into the working space by a hanger of the embossing device z. B. is attached to a resilient arm over the working space, the embossing device with a suitable choice of the spring force with which the sleeve is biased to its normal position, also simply be made 'sharp' that they grabbed on the sleeve and pulled down to the workpiece becomes.

Die erfindungsgemäße verschiebbare Hülse am Umfang des Gehäuses der Prägevorrichtung senkt nicht nur das Unfallrisiko, sondern ermöglicht bei kleineren Hand-Prägevorrichtungen, beispielsweise für Gravurstempel mit nur einem Zeichen von bis zu 6 mm Ziffernhöhe, wobei das Gehäuse weniger als 30 mm Durchmesser hat, auch eine ergonomischere Handhabung. So liegt eine Hülse mit zum Beispiel 35 mm Durchmesser wesentlich besser und angenehmer in der Hand als ein Gehäuse mit 30 mm Durchmesser oder weniger.The sliding sleeve according to the invention on the circumference of the housing of the embossing device not only reduces the risk of accidents, but allows for smaller hand embossing devices, for example, for engraving stamp with only one character of up to 6 mm digit height, the housing less than 30 mm diameter, also has a more ergonomic handling. So a sleeve with, for example, 35 mm diameter is much better and more comfortable in the hand than a housing with 30 mm diameter or less.

Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Further developments of the invention are specified in the subclaims.

Es folgt eine Beschreibung eines Ausführungsbeispiels der Erfindung anhand der Zeichnungen gemäß der Figuren 1a, 1b und 1c, die drei Längsschnitte durch ein und dieselbe Hand-Prägevorrichtung mit Druckluftantrieb und Auslösesperre zeigen, und zwar oben (Fig. 1a) in einer Grundstellung und in der Mitte (Fig. 1b) in einer gegen ein Werkstück gehaltenen Stellung, wobei die Auslösesperre teilweise verschoben ist, ohne dass Druckluft an der Prägevorrichtung anliegt. In der Darstellung der Fig. 1C, die eine Teilweise weggeschnittene Ansicht zeigt, ist die Auslösesperre in Richtung Prägestempel 7 vollständig verschoben, so dass ein Auslösen der Prägevorrichtung ermöglicht wird.The following is a description of an embodiment of the invention with reference to the drawings according to the figures 1a, 1b and 1c, which show three longitudinal sections through one and the same hand-stamping device with compressed air drive and trigger lock, above (Fig. 1a) in a basic position and in the Center (Fig. 1b) in a position held against a workpiece, wherein the trigger lock is partially shifted, without compressed air abuts the embossing device. In the illustration of FIG. 1C, which shows a partially cut away view, the trigger lock in the direction of the die 7 is completely displaced so that triggering of the embossing device is made possible.

Unter Bezugnahme auf Figuren 1a, 1b und 1c wird eine vereinfachte Version der aus der DE 37 39 539 C2 bekannten Prägevorrichtung gezeigt, mit einem rohrförmigen Gehäuse 1, einem entlang der Achse des Gehäuses 1 darin beweglichen Schlagbolzen 2, der das Innere des Gehäuses 1 in einen an einem Anschlussstück 3 mit einer Druckluftquelle verbindbaren Arbeitsraum 4 und einen Expansionsraum 5 unterteilt, und einem entlang der Achse des Gehäuses 1 beweglichen Prägestempelbolzen 6, der sich von einem an einem Ende des Gehäuses 1 aufzunehmenden Prägestempel 7 entlang der Achse des Gehäuses 1 in den Expansionsraum 5 hinein erstreckt, wo er dem Schlagbolzen 2 eine Aufprallfläche 8 darbietet. Eine Rückstellfeder 9 treibt den Schlagbolzen 2 und den Prägestempelbolzen 6 auseinander, und zwar treibt sie den Schlagbolzen 2 in Richtung auf das hintere Ende der Prägevorrichtung, das mit dem Anschlussstück 3 und einem schwenkbaren Bügel 10 zum Aufhängen der Prägevorrichtung versehen ist, und den Prägestempelbolzen 6 nach vorne gegen eine ringförmige Schulter 11, die in einem vorderen Abschnitt 1' des Gehäuses 1 ausgebildet ist, durch den sich der Prägestempelbolzen 6 erstreckt. Das Gehäuse 1 ist aus Fertigungsgründen zweiteilig, kann aber auch einteilig sein oder aus mehr als zwei Teilen bestehen.With reference to Figs. 1a, 1b and 1c, a simplified version of Figs DE 37 39 539 C2 a known embossing device, comprising a tubular housing 1, a firing pin 2 movable along the axis of the housing 1 therein, which divides the interior of the housing 1 into a working space 4 connectable to a connector 3 with a source of compressed air and an expansion space 5, and one along the Axis of the housing 1 movable stamping punch 6, which extends from a male to be accommodated at one end of the housing 1 stamp 7 along the axis of the housing 1 in the expansion space 5, where he presents the striker 2 an impact surface 8. A return spring 9 drives apart the firing pin 2 and the die 5, namely drives the firing pin 2 in the direction of the rear end of the embossing device, which is provided with the connector 3 and a pivotable bracket 10 for suspending the embossing device, and the embossing punch. 6 forward against an annular Shoulder 11, which is formed in a front portion 1 'of the housing 1, through which the stamping punch bolt 6 extends. The housing 1 is for manufacturing reasons in two parts, but may also be one piece or consist of more than two parts.

Die Schulter 11 bildet zum einen eine Hubbegrenzung für den Schlagbolzen 2, die die Bewegungsenergie des relativ schweren Schlagbolzens 2 abfängt, wenn ein Schlag nicht gegen ein Werkstück, sondern ins Leere ausgeführt wird. Lediglich die viel geringere Masse des Prägestempels 7 selbst wird durch eine Überwurfmutter 12 ganz vorne am Gehäuses 1 abgefangen, die den Prägestempel 7 festhält. Eine Schraube 13 dient als Verdrehsicherung für den Prägestempel 7.The shoulder 11 forms on the one hand a stroke limiter for the firing pin 2, which intercepts the kinetic energy of the relatively heavy firing pin 2 when a stroke is not carried out against a workpiece but into space. Only the much lower mass of the die 7 itself is intercepted by a union nut 12 at the very front of the housing 1, which holds the die 7. A screw 13 serves as an anti-rotation for the die 7.

Die Schulter 11 bildet zum anderen zusammen mit einem Dichtring 14 und einer ringförmigen Dichtfläche 15 am Prägestempelbolzen 6 ein Entlüftungsventil, über das der Expansionsraum 5 mit der Außenseite des Gehäuses 1 verbunden wird, wenn der Prägestempelbolzen 6 vom Dichtring 14 abgehoben wird, indem der Prägestempel 7 gegen ein Werkstück gedrückt wird. In diesem Fall kann die im scharfen Zustand der Prägevorrichtung unter Druck stehende Luft im Expansionsraum 5 durch eine partielle Einschnürung 16 des Prägestempelbolzens 6 und einen damit in Verbindung stehenden, quer zur Achse der Prägevorrichtung verlaufenden Entlüftungskanal 17 nach außen entweichen. Dem Entlüftungskanal 17 radial entgegengesetzt ragt übrigens eine Schraube 18 in die Einschnürung 16 hinein, um eine Hubbegrenzung für den Prägestempelbolzen 6 nach innen herzustellen.The shoulder 11 forms, on the other hand, together with a sealing ring 14 and an annular sealing surface 15 on the stamping punch 6 a vent valve, via which the expansion space 5 is connected to the outside of the housing 1 when the stamping punch 6 is lifted off the sealing ring 14 by the stamp 7 is pressed against a workpiece. In this case, the pressurized air in the sharp state of the embossing device in the expansion space 5 can escape through a partial constriction 16 of the embossing die pin 6 and a related, transverse to the axis of the embossing device venting channel 17 to the outside. Incidentally, a screw 18 projects into the constriction 16 radially opposite the ventilation channel 17 in order to produce a stroke limitation for the embossing punch bolt 6 inwards.

Die Luft kann nur dann durch den Entlüftungskanal 17 nach außen entweichen, wenn dieser zur Außenseite des Gehäuses 1 hin offen ist. In der gezeigten Grundstellung der Prägevorrichtung wird der Entlüftungskanal 17 durch eine rohrförmige Hülse 19 verschlossen, die das Gehäuse 1 mit ein wenig Spiel umgibt und so groß ist, dass eine Bedienungsperson die Prägevorrichtung sicher an der Hülse 19 greifen kann. Die Hülse 19 ist entlang der Achse des Gehäuses 1 verschiebbar und wird mittels einer Druckfeder 20 federnd in Richtung auf das hintere Ende der Prägevorrichtung getrieben. In dieser Stellung wird ein ringförmiger Bereich am Außenumfang des vorderen Abschnitts 1' des Gehäuses 1 zwischen zwei axial beabstandeten Dichtungsringen 21, 22, zwischen denen der Entlüftungskanal 17 endet, durch einen vorderen Abschnitt 19' der rohrförmigen Hülse 19 luftdicht verschlossen, wie in der oberen Ansicht der Zeichnung gezeigt. Somit ist die Prägevorrichtung gesichert.The air can escape through the vent passage 17 to the outside only if it is open to the outside of the housing 1. In the illustrated basic position of the embossing device, the venting channel 17 is closed by a tubular sleeve 19 which surrounds the housing 1 with a little play and is so large that an operator the embossing device securely on the Sleeve 19 can grip. The sleeve 19 is displaceable along the axis of the housing 1 and is driven by means of a compression spring 20 resiliently in the direction of the rear end of the embossing device. In this position, an annular area on the outer periphery of the front portion 1 'of the housing 1 between two axially spaced sealing rings 21, 22, between which the vent passage 17 ends, airtightly closed by a front portion 19' of the tubular sleeve 19, as in the upper View of the drawing shown. Thus, the embossing device is secured.

Wird die Hülse 19 relativ zum Gehäuse 1 so weit nach vorne verschoben, dass ihr vorderer Abschnitt 19' den Entlüftungskanal 17 nicht mehr verdeckt, wie in der unteren Ansicht der Zeichnung gezeigt, so kann die Luft aus dem Expansionraum 5 über die Einschnürung 16, den Entlüftungskanal 17, den ringförmigen Raum, in dem die Druckfeder 20 untergebracht ist, sowie nicht gezeigte Entlüftungsbohrungen oder -spalte an der Hülse 19 nach außen entweichen, und es kann ein Schlag ausgelöst werden, indem der Prägestempel 7 gegen ein Werkstück gedrückt wird. Alternativ dazu, kann die Luft aus dem Expansionraum 5 über die Einschnürung 16, den Entlüftungskanal 17, sowie den Zwischenraum, der zwischen der nach vorne verschobenen Hülse 19 und dem Abschnitt 1' des Gehäuses 1 entsteht, nach außen entweichen. Auch ist denkbar, das Entweichen der Luft nach außen durch eine Kombination bestehend aus dem Zwischenraum und/oder den Entlüftungsbohrungen oder -spalten zu bewerkstelligen.If the sleeve 19 so far moved relative to the housing 1 forward that its front portion 19 'no longer obscures the vent passage 17, as shown in the lower view of the drawing, the air from the expansion chamber 5 via the constriction 16, the Venting channel 17, the annular space in which the compression spring 20 is housed, and not shown vent holes or gaps on the sleeve 19 escape to the outside, and it can be triggered a blow by the die 7 is pressed against a workpiece. Alternatively, the air from the expansion chamber 5 via the constriction 16, the vent passage 17, and the gap which arises between the forward displaced sleeve 19 and the portion 1 'of the housing 1, escape to the outside. It is also conceivable to accomplish the escape of the air to the outside by a combination consisting of the intermediate space and / or the ventilation holes or gaps.

Claims (5)

Hand-Prägevorrichtung mit Druckluftantrieb, mit einem rohrförmigen Gehäuse (1), einem entlang der Achse des Gehäuses darin beweglichen Schlagbolzen (2), der das Innere des Gehäuses in einen mit einer Druckluftquelle verbindbaren Arbeitsraum (4) und einen Expansionsraum (5) unterteilt, einem entlang der Achse des Gehäuses beweglichen Prägestempelbolzen (6), der sich von einem an einem Ende des Gehäuses aufzunehmenden Prägestempel (7) in den Expansionsraum hinein erstreckt, und mit einem Entlüftungsventil (14, 15) zwischen dem Expansionsraum und wenigstens einem Entlüftungskanal (17) zur Außenseite des Gehäuses, welches Entlüftungsventil dafür eingerichtet ist, durch den Prägestempelbolzen geöffnet zu werden, wenn die Prägevorrichtung mit ihrem Prägestempel gegen ein Werkstück gedrückt wird, gekennzeichnet durch eine das rohrförmige Gehäuse (1) umgebende, als Handgriff gestaltete rohrförmige Hülse (19), die entlang der Achse des Gehäuses verschiebbar und federnd in eine Grundstellung vorgespannt ist, in der sie den wenigstens einen Entlüftungskanal (17) verschließt, und entgegen der Federkraft in eine den wenigstens einen Entlüftungskanal freigebende Stellung verschiebbar ist.Hand-embossing device with compressed air drive, comprising a tubular housing (1), a firing pin (2) which is movable along the axis of the housing and dividing the interior of the housing into a working space (4) which can be connected to a compressed air source and an expansion space (5), a stamping die (6) movable along the axis of the housing and extending into the expansion space from an embossing punch (7) to be received at one end of the housing, and a bleed valve (14, 15) between the expansion space and at least one bleed passage (17 ) to the outside of the housing, which vent valve is adapted to be opened by the stamping punch when the stamping device is pressed with its punch against a workpiece, characterized by a tubular housing (1) surrounding, designed as a handle tubular sleeve (19) , which are displaceable and resilient along the axis of the housing is biased in a basic position in which it closes the at least one venting channel (17), and against the spring force in a the at least one venting channel releasing position is displaceable. Prägevorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Hülse (19) in Richtung auf den Prägestempel (7) entgegen der Federkraft verschiebbar ist.Embossing device according to claim 1, characterized in that the sleeve (19) in the direction of the stamper (7) against the spring force is displaceable. Prägevorrichtung nach Anspruch 1 oder 2, mit einer Rückstellfeder (9) für den Prägestempelbolzen (6), die den Prägestempelbolzen in eine das Entlüftungsventil (14, 15) schließende Stellung treibt, dadurch gekennzeichnet, dass die Federkraft, mit der die Hülse (19) in ihre Grundstellung vorgespannt ist, kleiner ist als die Federkraft der Rückstellfeder für den Prägestempelbolzen.Embossing device according to Claim 1 or 2, having a return spring (9) for the embossing punch bolt (6), which drives the embossing punch bolt into a position closing the bleeding valve (14, 15), characterized in that the spring force with which the sleeve (19) is biased to its normal position, smaller than the spring force of the return spring for the stamping punch. Prägevorrichtung nach Anspruch 3, mit Anschlägen, die jeweils den Hub der Hülse (19) und den Hub des Prägestempelbolzens (6) begrenzen, dadurch gekennzeichnet, dass der Hub der Hülse größer ist als der Hub des Prägestempelbolzens.Embossing device according to claim 3, with stops, each of the Limit stroke of the sleeve (19) and the stroke of the embossing punch pin (6), characterized in that the stroke of the sleeve is greater than the stroke of the embossing punch pin. Prägevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Außendurchmesser der Hülse (19) mehr als 30 mm beträgt.Embossing device according to one of the preceding claims, characterized in that the outer diameter of the sleeve (19) is more than 30 mm.
EP07104361A 2006-03-17 2007-03-16 Manual embossing device with compressed air drive Active EP1834810B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202006004288U DE202006004288U1 (en) 2006-03-17 2006-03-17 Manual embossing device with pneumatic drive

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EP1834810A1 true EP1834810A1 (en) 2007-09-19
EP1834810B1 EP1834810B1 (en) 2010-01-06

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AT (1) ATE454273T1 (en)
DE (2) DE202006004288U1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154023A5 (en) * 1971-09-15 1973-05-04 Inst Gornogo Dela Sibirskogo O
GB2052346A (en) * 1979-06-18 1981-01-28 Kango Electric Hammers Ltd >Improvements relating to rotary hammer drills
US4349074A (en) * 1979-06-18 1982-09-14 Kango Electric Hammers Limited Convertible rotary impact hammer drill
GB2145959A (en) * 1983-09-06 1985-04-11 Vnii Pk I Mechanizirovannogo Air-spring percussive tool
GB2326368A (en) * 1997-06-18 1998-12-23 Milwaukee Electric Tool Corp Rotary hammer drill
DE19847687A1 (en) * 1998-10-15 2000-04-27 Wacker Werke Kg Hammer drill or hammer tool with an air spring has a connecting opening to link the air spring zone with the ambient atmosphere on idle running for a smooth change between working and idle running modes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154023A5 (en) * 1971-09-15 1973-05-04 Inst Gornogo Dela Sibirskogo O
GB2052346A (en) * 1979-06-18 1981-01-28 Kango Electric Hammers Ltd >Improvements relating to rotary hammer drills
US4349074A (en) * 1979-06-18 1982-09-14 Kango Electric Hammers Limited Convertible rotary impact hammer drill
GB2145959A (en) * 1983-09-06 1985-04-11 Vnii Pk I Mechanizirovannogo Air-spring percussive tool
GB2326368A (en) * 1997-06-18 1998-12-23 Milwaukee Electric Tool Corp Rotary hammer drill
DE19847687A1 (en) * 1998-10-15 2000-04-27 Wacker Werke Kg Hammer drill or hammer tool with an air spring has a connecting opening to link the air spring zone with the ambient atmosphere on idle running for a smooth change between working and idle running modes

Also Published As

Publication number Publication date
DE502007002519D1 (en) 2010-02-25
ATE454273T1 (en) 2010-01-15
EP1834810B1 (en) 2010-01-06
DE202006004288U1 (en) 2006-05-11

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