EP0190612A2 - Device for picking-up a sheet by means of a suction gripper - Google Patents

Device for picking-up a sheet by means of a suction gripper Download PDF

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Publication number
EP0190612A2
EP0190612A2 EP86100842A EP86100842A EP0190612A2 EP 0190612 A2 EP0190612 A2 EP 0190612A2 EP 86100842 A EP86100842 A EP 86100842A EP 86100842 A EP86100842 A EP 86100842A EP 0190612 A2 EP0190612 A2 EP 0190612A2
Authority
EP
European Patent Office
Prior art keywords
film
suction
sheet
edge
suction line
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
Application number
EP86100842A
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German (de)
French (fr)
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EP0190612A3 (en
EP0190612B1 (en
Inventor
Walter Bauer
Johann Zanner
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.)
Agfa Gevaert AG
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Agfa Gevaert AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of EP0190612A2 publication Critical patent/EP0190612A2/en
Publication of EP0190612A3 publication Critical patent/EP0190612A3/en
Application granted granted Critical
Publication of EP0190612B1 publication Critical patent/EP0190612B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/0808—Suction grippers
    • B65H3/0883—Construction of suction grippers or their holding devices

Definitions

  • the invention relates to a device for removing a sheet of film from an X-ray film cassette or an X-ray sheet film magazine or the like, the sheet film to be removed being drawn by at least one sucker near an end face of the film to be lifted by means of a curved suction lip inner surface into which a suction line opens and which is essentially rotationally symmetrical, preferably frustoconical is suckable.
  • a sucker for lifting flexible bend is known, which is followed by a bellows in the direction of the suction line, which has a lower bending stiffness to form a bending axis in two diametrical areas, the bending axis being transverse to the one to be lifted first
  • the edge of the sheet or stack runs.
  • the sheets to be lifted are tilted so that they are more easily separated from an underlying sheet split off.
  • An absolutely safe separation of the top sheet from the sheet below it cannot be achieved with this, however, because a very strongly adhering sheet underneath u. U. still takes part in the tilting movement of a sheet to be lifted. A possibly adhering lower sheet is only shaken off after the sheet to be conveyed has been lifted off.
  • the invention is based on the object of improving a device of the type mentioned in such a way that the lifting of the sheet film to be lifted takes place in such a way that air can flow in between it and the subsequent film and accelerate the detachment of the subsequent film or the base, so that a safe separation takes place with simple means before the sheet film to be conveyed is lifted off.
  • a top sheet film to be lifted off is forced a small barrel-like curvature inside the suction lips of the suction device, the longitudinal axis of which extends perpendicularly to the film front edge and to the axis of the suction line and extends to the film front edge or stack edge.
  • This barrel-like curvature thus forms a channel running perpendicular to the edge of the film, through which air can very quickly flow between the sheet film and the underlying sheet (further sheet film, reinforcing film, cassette bottom) flows in.
  • This inflowing air immediately breaks the suction between the sheet to be lifted and its base, so that a safe and quick separation between them is ensured with the simplest means before lifting the sheet film to be lifted.
  • FIG 1 denotes a storage film cassette, as z. B. is required in X-ray film cassette loading devices for the supply stack.
  • a film stack with 2 the first sheet, raised by two suction cups 3 of a suction device, not shown, with 4, a stop bar arranged in front of the sheet stack 2 in the transport direction with 5 and transport rollers with 6.
  • the transport rollers 6 lie in the transport direction in front of the stop bar 5.
  • Two limit bars 7 are arranged on the side of the stack 2 in connection with the stop bar 5 and keep the stack 2 aligned.
  • the suction cups 3 first lift the top sheet 4 perpendicular to the stack 2, so that it slides up on the stop bar 5, in order to then lift it over the stop bar 5 and feed it to the transport rollers.
  • the cassette floor area is designated 8.
  • Each sucker 3 has suction lips 3a, the inner surface of which is rotationally symmetrical, preferably frustoconical, and merges into the mouth 9a of a suction line 9 in its highest area as seen from the film.
  • Squeegee blades 3a can along at least one outer peripheral line 3b annular grooves or dilutions have to their by comparison d ünnung rim already increased elasticity even further to increase and thereby improve application to a film 4 to be lifted off and its suction, as can be seen particularly clearly in FIG. 5b.
  • suckers suck a sheet to be lifted dome-shaped and approximately symmetrical to the axis of the suction line mouth 9a, so that additional to shake off a sheet adhering to the sheet to be lifted off
  • the inner surface of the suction lip 3c has, in a region near the mouth of the suction line 9a, a surface piece 10 which deviates from a truncated cone surface and has an axis running perpendicular to the front edge 4a of the film and which is recessed upwards relative to a sheet to be lifted off or forms a depression upwards . It is thereby achieved that the film surface under the nipple 3 is no longer domed, but more barrel-like, with the longitudinal axis of this barrel-like curvature being directed towards the film end edge 4a. These relatively narrow barrel-like arches extend because of their proximity to the front edge 4a and are designated by 4b in FIGS. 1 and 2.
  • the surface piece 10 is formed by a cylinder inner surface piece cut with the frustoconical suction lip inner surface 3c, the surface lines 10a of which are shorter than the largest inner suction lip diameter 3d.
  • the surface lines 10a run perpendicular to the film front edge 4a.
  • a barrel-shaped or cylindrical curvature 4b corresponding to the shape of the cylindrical surface piece 10 is forced on the sheet film 4 which is sucked in, which continues to the edge 4a of the film, so that air flows in between the sucked-in film 4 and the underlying surface parts 2 and becomes detached, possibly adhering Documents.
  • a chord 12 running through the suction line opening 9a parallel to the film front edge 4a between the most distant points of the cylindrical surface piece 10 is greater than the length of its surface lines.
  • the curvature of the cylinder piece 10 receives a proportion which is particularly favorable for the formation of the barrel-shaped curvature 4b.
  • FIGS. 3 to 5b Another embodiment according to FIGS. 3 to 5b has, as the surface piece 10, two wedge surface parts 10b running on both sides of the suction line opening 9a which, seen from the film front edge 4a, fall backwards.
  • the axis of this surface section 10, 10b is formed as an axis of symmetry by the perpendicular to the front edge 4a running through the suction line opening 9a.
  • a sucked-in sheet 4 is raised a little higher into the deeper channel between the two wedges 10b and also under the suction lips 3a near the film edge than on the opposite side.
  • a barrel-like or cone-like curvature 4b the axis of which is perpendicular to the front edge 4a, is forced on the film 4.
  • the suction line opening 9a is asymmetrical to the suction lips 3a, namely offset from the front edge 4a to the rear. This allows the suction device to be detached from a solid base, e.g. B. 8, facilitate when the film stack is used up.
  • the innovation suction device training can be used advantageously for separating film stacks, for. B. in sheet film storage magazines. However, it can also be used just as advantageously when a single film is removed from a film cassette, because the film adhering to an intensifying film or cassette wall is also easily detached. It may be advantageous if the edge of the suction lip has a small recess 3d at a location not immediately adjacent to the film front edge 4a, which then facilitates detachment of the suction device 3 if, instead of a sheet film to be lifted off, with the cassette or already empty empty magazine sucks the amplifier film or the cassette bottom or magazine bottom 8.
  • This recess 3d is so far out that it does not affect the desired suction, but that with a slight lifting of the suction device at this recess 3d air can be let in under the suction device, so that the suction device 8 can be detached from solid documents.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)

Abstract

Eine Vorrichtung zum Entnehmen jeweils eines Blattfilms aus einer Röntgenfilmkassette oder einem Röntgenblattfilmmagazin oder dergleichen, wobei durch mindestens einen Sauger der zu entnehmende Blattfilm nahe einer anzuhebenden Filmstirnkante mittels einer gewölbten Sauglippeninnenfläche, in die eine Saugleitung mündet und die im wesentlichen rotationssymmetrisch vorzugsweise kegelstumpfförmig ist, ansaugbar ist, ist so ausgebildet, daß die Sauglippeninnenfläche (3c) in einem nahe der Saugleitungseinmündung (9a) gelegenen Bereich ein von der rotationssymmetrischen Fläche abweichendes, eine senkrecht zur Filmstirnkante (4a) verlaufende Achse aufweisendes, vom Blattfilm weg vertieftes Flächenstück (10) aufweist. Hierdurch wird ein Loslösen eines anhaftenden Blattes vor dem Anheben des zu fördernden Blattfilms erreicht.A device for removing a sheet of film from an X-ray film cassette or an X-ray sheet film magazine or the like, wherein the sheet film to be removed can be sucked in by means of at least one suction device near an end face of the film to be lifted by means of a curved suction lip inner surface, into which a suction line opens and which is essentially rotationally symmetrical, preferably frustoconical , is designed so that the inner surface of the suction lip (3c) in a region near the mouth of the suction line (9a) has a surface piece (10) which deviates from the rotationally symmetrical surface and has an axis running perpendicular to the edge of the film (4a) and recessed away from the film. In this way, detachment of an adhering sheet is achieved before the sheet film to be conveyed is lifted.

Description

Die Erfindung betrifft eine Vorrichtung zum Entnehmen jeweils eines Blattfilms aus einer Röntgenfilmkassette oder einem Röntgenblattfilmmagazin oder dergleichen, wobei durch mindestens einen Sauger der zu entnehmende Blattfilm nahe einer anzuhebenden Filmstirnkante mittels einer gewölbten Sauglippeninnenfläche, in die eine Saugleitung mündet und die im wesentlichen rotationssymmetrisch, vorzugsweise kegelstumpfförmig ist, ansaugbar ist.The invention relates to a device for removing a sheet of film from an X-ray film cassette or an X-ray sheet film magazine or the like, the sheet film to be removed being drawn by at least one sucker near an end face of the film to be lifted by means of a curved suction lip inner surface into which a suction line opens and which is essentially rotationally symmetrical, preferably frustoconical is suckable.

Durch die DE-PS 26 33 831 ist ein Sauger zum Abheben von biegsamen Bogen bekannt, an den sich in Richtung der Saugleitung ein Faltenbalg anschließt, der zur Bildung einer Biegeachse in zwei diametralen Bereichen eine geringere Biegesteifigkeit aufweist, wobei die Biegeachse quer zur zuerst anzuhebenden Bogen- bzw. Stapelkante verläuft. Hierduch wird zusätzlich zum Anheben ein Verkippen der abzuhebenden Bogen erreicht, so daß sie sich leichter von einem darunterliegenden Bogen abtrennen. Eine absolut sichere Trennung des obersten von den darunterliegenden Bogen läßt sich hiermit jedoch nicht erreichen, weil ein sehr stark anhaftender darunterliegender Bogen u. U. die Verkippbewegung eines abzuhebenden Bogens noch mitmacht. Das Abschütteln eines eventuell anhaftenden unteren Bogens erfolgt dabei erst nach dem Abheben des zu fördernden Blattes.From DE-PS 26 33 831 a sucker for lifting flexible bend is known, which is followed by a bellows in the direction of the suction line, which has a lower bending stiffness to form a bending axis in two diametrical areas, the bending axis being transverse to the one to be lifted first The edge of the sheet or stack runs. In this way, in addition to lifting, the sheets to be lifted are tilted so that they are more easily separated from an underlying sheet split off. An absolutely safe separation of the top sheet from the sheet below it cannot be achieved with this, however, because a very strongly adhering sheet underneath u. U. still takes part in the tilting movement of a sheet to be lifted. A possibly adhering lower sheet is only shaken off after the sheet to be conveyed has been lifted off.

Der Erfindung liegt demgegenüber die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Art dahingehend zu verbessern, daß das Anheben des abzuhebenden Blattfilms derart erfolgt, daß zwischen diesen und den nachfolgenden Film gezielt Luft einströmen kann und das Ablösen des nachfolgenden Films oder der Unterlage beschleunigt, so daß eine sichere Trennung mit einfachen Mitteln vor dem Abheben des zu fördernden Blattfilms erfolgt.The invention is based on the object of improving a device of the type mentioned in such a way that the lifting of the sheet film to be lifted takes place in such a way that air can flow in between it and the subsequent film and accelerate the detachment of the subsequent film or the base, so that a safe separation takes place with simple means before the sheet film to be conveyed is lifted off.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Hauptanspruchs gelöst. Weitere vorteilhafte Merkmale der Neuerung sind den Unteransprüchen entnehmbar.This object is achieved according to the invention by the features of the main claim. Further advantageous features of the innovation can be found in the subclaims.

Durch die erfindungsgemäßen Merkmale wird erreicht, daß einem abzuhebenden, obersten Blattfilm innerhalb der Sauglippen des Saugers eine kleine tonnenähnliche Krümmung aufgezwungen wird, deren Längsachse senkrecht zur Filmstirnkante und zur Achse der Saugleitung verläuft und bis zur Filmstirnkante bzw. Stapelkante reicht. Diese tonnenähnliche Krümmung bildet also einen senkrecht zur Filmstirnkante verlaufenden Kanal, durch den sehr rasch Luft zwischen den abzuhebenden Blattfilm und das darunterliegende Blatt (weiterer Blattfilm, Verstärkerfolie, Kassettenboden) einströmt. Durch diese einströmende Luft bricht sofort der Sog zwischen dem abzuhebenden Blatt und dessen Unterlage zusammen, so daß eine sichere und rasche Trennung zwischen diesen mit einfachsten Mitteln vor dem Anheben des abzuhebenden Blattfilms gewährleistet wird.It is achieved by the features according to the invention that a top sheet film to be lifted off is forced a small barrel-like curvature inside the suction lips of the suction device, the longitudinal axis of which extends perpendicularly to the film front edge and to the axis of the suction line and extends to the film front edge or stack edge. This barrel-like curvature thus forms a channel running perpendicular to the edge of the film, through which air can very quickly flow between the sheet film and the underlying sheet (further sheet film, reinforcing film, cassette bottom) flows in. This inflowing air immediately breaks the suction between the sheet to be lifted and its base, so that a safe and quick separation between them is ensured with the simplest means before lifting the sheet film to be lifted.

Die Erindung wird anhand von Zeichnungen näher erläutert. Es zeigen

  • Fig.1 eine vereinfachte, schematische, perspektivische Darstellung einer Vorrichtung, an der die Neuerung verwendbar bzw. verwendet ist,
  • Fig.2 eine gegenüber Fig.l vergrößerte, perspektivische Darstellung eines neuerungsgemäßen Saugers,
  • Fig.3 eine Draufsicht auf eine neuerungsgemäße Saugerausgestaltung,
  • Fig.4 eine Untersicht unter den Sauger nach Fig.3,
  • Fig.5a einen Schnitt durch den Sauger nach den Fig.3 und 4 gemäß der Schnittlinie V-V unmittelbar vor dem Ansaugen eines Blattfilms,
  • Fig.5b den Schnitt nach Fig.5a beim Ansaugen eines Blattfilms,
  • Fig.6 eine Untersicht unter eine weitere erfindungsgemäße Saugerausgestaltung,
  • Fig.7 einen Schnitt durch den Sauger nach Fig.6 gemäß der Schnittlinie VII-VII,
  • Fig.8 einen Schnitt durch den Sauger nach Fig.6 gemäß der Schnittlinie VIII-VIII.
The invention is explained in more detail with the aid of drawings. Show it
  • 1 shows a simplified, schematic, perspective view of a device on which the innovation can be used,
  • 2 shows an enlarged perspective view of a vacuum cleaner according to the invention,
  • 3 shows a top view of a new design of suction device,
  • 4 shows a bottom view under the vacuum cleaner according to FIG. 3,
  • 5a shows a section through the suction device according to FIGS. 3 and 4 according to the section line VV immediately before the suction of a sheet film,
  • 5b shows the section according to FIG. 5a when sucking in a sheet film,
  • 6 shows a bottom view under a further suction device configuration according to the invention,
  • F ig.7 a section through the suction device according to Figure 6 along the section line VII-VII,
  • F ig.8 a section through the suction device according to Figure 6 along the section line VIII-VIII.

In Fig.1 ist mit 1 eine Vorratsfilmkassette bezeichnet, wie sie z. B. in Röntgenfilmkassettenbeladegeräten für die Vorratsstapel benötigt wird. Des weiteren sind ein Filmstapel mit 2, dessen obserstes, durch zwei Sauger 3 einer nicht näher gezeigten Saugvorrichtung angehobenes Blatt mit 4, eine in Transportrichtung unten vor dem Blattstapel 2 angeordnete Anschlagleiste mit 5 und Transportwalzen mit 6 bezeichnet. Die Transportwalzen 6 liegen in Transportrichtung vor der Anschlagleiste 5. Seitlich des Stapels 2 sind im Anschluß an die Anschlagleiste 5 zwei Begrenzungsleisten 7 angeordnet, die den Stapel 2 ausgerichtet halten. Die Sauger 3 heben das oberste Blatt 4 zunächst senkrecht zum Stapel 2 an, so daß es an der Anschlagleiste 5 hochgleitet, um es dann über die Anschlagleiste 5 zu heben und den Transportwalzen zuzuführen. Die Kassettenbodenfläche ist mit 8 bezeichnet.In Figure 1, 1 denotes a storage film cassette, as z. B. is required in X-ray film cassette loading devices for the supply stack. Furthermore, a film stack with 2, the first sheet, raised by two suction cups 3 of a suction device, not shown, with 4, a stop bar arranged in front of the sheet stack 2 in the transport direction with 5 and transport rollers with 6. The transport rollers 6 lie in the transport direction in front of the stop bar 5. Two limit bars 7 are arranged on the side of the stack 2 in connection with the stop bar 5 and keep the stack 2 aligned. The suction cups 3 first lift the top sheet 4 perpendicular to the stack 2, so that it slides up on the stop bar 5, in order to then lift it over the stop bar 5 and feed it to the transport rollers. The cassette floor area is designated 8.

Jeder Sauger 3 weist Sauglippen 3a auf, deren Innenfläche an sich rotationssymmetrisch, vorzugsweise kegelstumpfähnlich, ausgebildet ist und in die Einmündung 9a einer Saugleitung 9 in ihrem vom Film aus gesehen höchsten Bereich übergeht. Die Sauglippen 3a können längs wenigstens einer äußeren Umfangslinie ringförmige Rillen 3b oder Verdünnungen aufweisen, um ihre durch Ver- dünnung am Rand bereits erhöhte Elastizität noch weiter zu erhöhen und dadurch ein Anlegen an einen abzuhebenden Film 4 und dessen Ansaugen zu verbessern, wie dies in Fig.5b besonders deutlich erkennbar ist. Insoweit bekannte Sauger saugen ein abzuhebendes Blatt kuppelförmig und etwa symmetrisch zur Achse der Saugleitungseinmündung 9a an, so daß zum Abschütteln eines am abzuhebenden Blatt anhaftenden Blattes zusätzlicheEach sucker 3 has suction lips 3a, the inner surface of which is rotationally symmetrical, preferably frustoconical, and merges into the mouth 9a of a suction line 9 in its highest area as seen from the film. Squeegee blades 3a can along at least one outer peripheral line 3b annular grooves or dilutions have to their by comparison d ünnung rim already increased elasticity even further to increase and thereby improve application to a film 4 to be lifted off and its suction, as can be seen particularly clearly in FIG. 5b. As far as known suckers suck a sheet to be lifted dome-shaped and approximately symmetrical to the axis of the suction line mouth 9a, so that additional to shake off a sheet adhering to the sheet to be lifted off

Dreh- oder Kippbewegungen des Saugers notwendig waren. Zur Erzielung dieser Dreh- oder Kippbewegungen der Sauger sind komplizierte mechanische Steuervorrichtungen erforderlich, die unter Verbesserung der Wirkung mit der vorliegenden Neuerung vermieden wereden sollen.Rotating or tilting movements of the suction cup were necessary. In order to achieve these rotary or tilting movements of the suction devices, complicated mechanical control devices are required, which the present innovation is intended to avoid while improving the effect.

Zur Erzielung dieser Wirkung weist die Sauglippeninnenfläche 3c in einem nahe der Saugleitungseinmündung 9a gelegenen Bereich ein von einer Kegelstumpffläche abweichendes, eine senkrecht zur Filmstirnkante 4a verlaufende Achse aufweisendes Flächenstück 10 auf, das gegenüber einem abzuhebenden Blatt nach oben vertieft ist bzw. eine Mulde nach oben bildet. Dadurch wird erreicht, daß beim Ansaugen die Filmfläche unter dem Sauger 3 nicht mehr kuppelförmig, sondern mehr tonnen- ähnlich verwölbt wird, wobei die Längsachse dieser tonnenähnlichen Wölbung auf die Filmstirnkante 4a gerichtet ist. Diese relativ schmalen tonnenähnlichen Wölbungen dehnen sich wegen deren Nähe bis zur Stirnkante 4a aus und sind in den Fig.l und 2 mit 4b bezeichnet. Da sie sehr begrenzt sind, wird an ihrer Stelle das unter dem Blatt 4 liegende Blatt an dieser Stelle abgespalten, so daß Luft zwischen das abzuhebende und das darunterliegende Material einströmt und eine völlige Trennung bewirkt. Dieser Vorgang erfordert sehr wenig Zeit, die für eine saubere Trennung trotz der Schnelligkeit des Filmtransports noch klein genung ist.In order to achieve this effect, the inner surface of the suction lip 3c has, in a region near the mouth of the suction line 9a, a surface piece 10 which deviates from a truncated cone surface and has an axis running perpendicular to the front edge 4a of the film and which is recessed upwards relative to a sheet to be lifted off or forms a depression upwards . It is thereby achieved that the film surface under the nipple 3 is no longer domed, but more barrel-like, with the longitudinal axis of this barrel-like curvature being directed towards the film end edge 4a. These relatively narrow barrel-like arches extend because of their proximity to the front edge 4a and are designated by 4b in FIGS. 1 and 2. Since they are very limited, the sheet under sheet 4 is split off at this point, so that air flows in between the material to be lifted off and the material underneath and a complete one Separation causes. This process requires very little time, which is still small enough for a clean separation despite the speed of the film transport.

Bei dem Ausführungsbeispiel nach den Fig.6 bis 8 wird das Flächenstück 10 durch ein mit der kegelstumpfförmigen Sauglippeninnenfläche 3c verschnittenes Zylinderinnenflächenstück gebildet, dessen Mantellinien 10a kürzer sind als der größte Sauglippeninnendurchmesser 3d. Dabei verlaufen die Mantellinien 10a senkrecht zur Filmstirnkante 4a. Hierdurch wird dem angesaugten Blattfilm 4 beim Ansaugen eine tonnenförmige oder zylinderstückförmige Krümmung 4b entsprechend der Form des Zylinderflächenstücks 10 aufgezwungen, die sich bis zur Filmstirnkante 4a fortsetzt, so daß Luft zwischen den angesaugten Film 4 und die darunterliegenden Flächenteile 2 einströmt und zu einer Ablösung eventuell anhaftender Unterlagen führt. Dabei ist es günstig, wenn eine durch die Saugleitungseinmündung 9a parallel zur Filmstirnkante 4a verlaufende Sehne 12 zwischen den am weitesten auseinanderliegenden Punkten des Zylinderflächenstücks 10 größer ist als die Länge von dessen Mantellinien. Dadurch erhält die Krümmung des Zylinderstücks 10 eine für die Bildung der tonnenförmigen Wölbung 4b besonders günstige Proportion. Es wäre aber auch möglich, statt eines Kreiszylinderflächenstücks 10 eine andere Zylinderinnenform zu wählen, z. B. mit elliptischem Querschnitt.In the exemplary embodiment according to FIGS. 6 to 8, the surface piece 10 is formed by a cylinder inner surface piece cut with the frustoconical suction lip inner surface 3c, the surface lines 10a of which are shorter than the largest inner suction lip diameter 3d. The surface lines 10a run perpendicular to the film front edge 4a. As a result, a barrel-shaped or cylindrical curvature 4b corresponding to the shape of the cylindrical surface piece 10 is forced on the sheet film 4 which is sucked in, which continues to the edge 4a of the film, so that air flows in between the sucked-in film 4 and the underlying surface parts 2 and becomes detached, possibly adhering Documents. It is advantageous if a chord 12 running through the suction line opening 9a parallel to the film front edge 4a between the most distant points of the cylindrical surface piece 10 is greater than the length of its surface lines. As a result, the curvature of the cylinder piece 10 receives a proportion which is particularly favorable for the formation of the barrel-shaped curvature 4b. But it would also be possible to choose a different cylindrical inner shape instead of a circular cylindrical surface piece 10, z. B. with an elliptical cross section.

Eine andere Ausführungsform gemäß den Fig.3 bis 5b weist als Flächenstück 10 zwei beiderseits der Saugleitungseinmündung 9a verlaufende Keilflächenteile 10b auf, die, von der Filmstirnkante 4a aus gesehen, nach hinten abfallen. Die Achse dieses Flächenstücks 10, lOb wird als Symmetrieachse gebildet durch die durch die Saugleitungseinmündung 9a verlaufende Senkrechte auf die Stirnkante 4a. Dadurch wird ein angesaugtes Blatt 4 ein wenig in den tieferen Kanal zwischen den beiden Keilen 10b und außerdem unter den Sauglippen 3a in Filmkantennähe höher angehoben als an der gegenüberliegenden Seite. Auch hierbei wird dem Film 4 eine tonnen- oder kegelstückähnliche Wölbung 4b, deren Achse senkrecht zur Stirnkante 4a verläuft, aufgezwungen. Die Wirkung ist hierbei im wesentlichen die gleiche wie nach der Ausführungsform nach den Fig.6 bis 8. Zeckmäßigerweise liegt jedoch bei dieser Ausführungsform die Saugleitungseinmündung 9a unsymmetrisch zu den Sauglippen 3a, und zwar von der Stirnkante 4a weg nach hinten versetzt. Hierdurch läßt sich das Ablösen des Saugers von einer festen Unterlage, z. B. 8, bei aufgebrauchtem Filmstapel erleichtern.Another embodiment according to FIGS. 3 to 5b has, as the surface piece 10, two wedge surface parts 10b running on both sides of the suction line opening 9a which, seen from the film front edge 4a, fall backwards. The axis of this surface section 10, 10b is formed as an axis of symmetry by the perpendicular to the front edge 4a running through the suction line opening 9a. As a result, a sucked-in sheet 4 is raised a little higher into the deeper channel between the two wedges 10b and also under the suction lips 3a near the film edge than on the opposite side. Here too, a barrel-like or cone-like curvature 4b, the axis of which is perpendicular to the front edge 4a, is forced on the film 4. The effect here is essentially the same as that according to the embodiment according to FIGS. 6 to 8. However, in this embodiment, the suction line opening 9a is asymmetrical to the suction lips 3a, namely offset from the front edge 4a to the rear. This allows the suction device to be detached from a solid base, e.g. B. 8, facilitate when the film stack is used up.

Die neuerungsgemäße Saugerausbildung ist vorteilhaft anwendbar zum Vereinzelnen von Filmstapeln, z. B. in Blattfilmvorratsmagazinen. Sie ist aber auch genauso vorteilhaft anwendbar beim Entnehmen eines einzelnen Films aus einer Filmkassette, weil sich hierbei der an einer Verstärkerfolie oder Kassettenwand haftende Film ebenfalls leicht ablöst. Dabei kann es günstig sein, wenn der Sauglippenrand an einer der Filmstirnkante 4a nicht unmittelbar benachbarten Stelle eine kleine Ausnehmung 3d aufweist, die dann ein Ablösen des Saugers 3 erleichtert, wenn dieser statt eines abzuhe- benden Blattfilms bei bereits entleerter Kassette oder entleertem Magazin die Verstärkerfolie oder den Kassettenboden oder Magazinboden 8 ansaugt. Diese Ausnehmung 3d liegt so weit außen, daß sie das erwünschte Ansaugen nicht beeinträchtigt, daß aber bei einem geringfügigen Anheben des Saugers an dieser Ausnehmung 3d Luft unter den Sauger eingelassen werden kann, so daß der Sauger von festen Unterlagen 8 abgelöst werden kann.The innovation suction device training can be used advantageously for separating film stacks, for. B. in sheet film storage magazines. However, it can also be used just as advantageously when a single film is removed from a film cassette, because the film adhering to an intensifying film or cassette wall is also easily detached. It may be advantageous if the edge of the suction lip has a small recess 3d at a location not immediately adjacent to the film front edge 4a, which then facilitates detachment of the suction device 3 if, instead of a sheet film to be lifted off, with the cassette or already empty empty magazine sucks the amplifier film or the cassette bottom or magazine bottom 8. This recess 3d is so far out that it does not affect the desired suction, but that with a slight lifting of the suction device at this recess 3d air can be let in under the suction device, so that the suction device 8 can be detached from solid documents.

Claims (6)

1. Vorrichtung zum Entnehmen jeweils eines Blattfilms aus einer Röntgenfilmkassette oder einem Röntgenblattfilmmagazin oder dergleichen, wobei durch mindestens einen Sauger der zu entnehmende Blattfilm nahe einer anzuhebenden Filmstirnkante mittels einer gewölbten Sauglippeninnenfläche, in die eine Saugleitung mündet und die im wesentlichen rotationssymmetrisch, vorzugsweise kegelstumpfförmig ist, ansaugbar ist, dadurch gekennzeichnet, daß die Sauglippeninnenfläche (3c) in einem nahe der Saugleitungseinmündung (9a) gelegenen Bereich ein von der rotationssymmetrischen Fläche abweichendes, eine senkrecht zur Filmstirnkante (4a) verlaufende Achse aufweisendes, vom Blattfilm weg vertieftes Flächenstück (10) aufweist.1.Device for removing a sheet film from an X-ray film cassette or an X-ray sheet film magazine or the like, the sheet film to be removed being drawn by at least one suction device near an end face of the film to be lifted by means of a curved suction lip inner surface into which a suction line opens and which is essentially rotationally symmetrical, preferably frustoconical, Can be sucked in, characterized in that the inner surface of the squeegee (3c) has in a region near the mouth of the suction line (9a) a surface piece (10) which deviates from the rotationally symmetrical surface and has an axis running perpendicular to the edge of the film (4a) and recessed away from the film. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Flächenstück (10) durch ein mit der Kegelstumpffläche (3c) der Sauglippeninnenfläche verschnittenes Kreiszylinderinnenflächenstück gebildet wird, dessen Mantellinien (10a) kleiner sind als der größte Sauglippendurchmesser (3d) und senkrecht zur Filmstirnkante (4a) verlaufen.2. Apparatus according to claim 1, characterized in that the surface piece (10) is formed by a circular cylinder inner surface piece which is blended with the truncated cone surface (3c) of the inner surface of the suction lip, the surface lines of which (10a) are smaller than the largest suction lip diameter (3d) and perpendicular to the film front edge ( 4a) run. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß eine durch die Saugleitungseinmündung (9a) parallel zur Filmstirnkante (4a) verlaufende Sehne (12) zwischen den am weitesten auseinander gelegenen Punkten des Flächenstücks (10) größer ist als die Länge von dessen Mantellinien (lOa).3. Apparatus according to claim 2, characterized in that one through the suction line opening (9a) parallel to the film front edge (4a) running chord (12) between the most distant points of the surface piece (10) is greater than the length of its surface lines (10a). 4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Flächenstück (10) durch beiderseits der Saugleitungseinmündung (9a) verlaufende Keilflächenstücke (10b) gebildet wird, die in Richtung von der Filmstirnkante (4a) weg zur Ebene des Blattfilms (4) hin abfallen.4. The device according to claim 1, characterized in that the surface piece (10) is formed by wedge surface pieces (10b) extending on both sides of the suction line mouth (9a), which drop away in the direction from the film end edge (4a) to the level of the sheet film (4) . 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die Saugleitungseinmündung (9a) gegenüber den Sauglippen (3a) unsymmetrisch von der Filmstirnkante (4a) weg versetzt angeordnet ist.5. The device according to claim 4, characterized in that the suction line opening (9a) with respect to the suction lips (3a) is arranged asymmetrically away from the film end edge (4a). 6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an einer der Filmstirnkante (4a) abgewandten Stelle des Sauglippenrandes (3a) eine flache Randausnehmung (3d) vorgesehen ist.6. Device according to one of the preceding claims, characterized in that a flat edge recess (3d) is provided on a point of the suction lip edge (3a) facing away from the film front edge (4a).
EP86100842A 1985-02-02 1986-01-22 Device for picking-up a sheet by means of a suction gripper Expired EP0190612B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853503622 DE3503622A1 (en) 1985-02-02 1985-02-02 DEVICE FOR REMOVING A LEAF FILM BY MEANS OF A SUCTION CLEANER
DE3503622 1985-02-02

Publications (3)

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EP0190612A2 true EP0190612A2 (en) 1986-08-13
EP0190612A3 EP0190612A3 (en) 1988-01-07
EP0190612B1 EP0190612B1 (en) 1989-03-15

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Application Number Title Priority Date Filing Date
EP86100842A Expired EP0190612B1 (en) 1985-02-02 1986-01-22 Device for picking-up a sheet by means of a suction gripper

Country Status (3)

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US (1) US4979729A (en)
EP (1) EP0190612B1 (en)
DE (2) DE3503622A1 (en)

Cited By (2)

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EP0467203A2 (en) * 1990-07-16 1992-01-22 E.I. Du Pont De Nemours And Company Method and apparatus for moving a sheet
EP0819632A2 (en) * 1996-07-18 1998-01-21 MAN Roland Druckmaschinen AG Suction nozzle

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DE102004014635B4 (en) 2004-03-22 2006-01-19 J. Schmalz Gmbh Suction pads
US20070138733A1 (en) * 2005-12-16 2007-06-21 Chris Gray Pick mechanism

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DE1676130U (en) * 1954-02-02 1954-05-13 Mabeg Maschb G M B H SUCTION NOZZLE.
US3552741A (en) * 1968-07-26 1971-01-05 Harris Intertype Corp Sheet gripping means
DE2633831B1 (en) * 1976-07-28 1978-01-05 Vits Maschb Gmbh Sucker for lifting flexible objects with a flat surface, especially sheets made of paper or foil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0467203A2 (en) * 1990-07-16 1992-01-22 E.I. Du Pont De Nemours And Company Method and apparatus for moving a sheet
EP0467203A3 (en) * 1990-07-16 1993-06-09 E.I. Du Pont De Nemours And Company Method and apparatus for moving a sheet
EP0819632A2 (en) * 1996-07-18 1998-01-21 MAN Roland Druckmaschinen AG Suction nozzle
EP0819632A3 (en) * 1996-07-18 1998-09-23 MAN Roland Druckmaschinen AG Suction nozzle

Also Published As

Publication number Publication date
EP0190612A3 (en) 1988-01-07
DE3662381D1 (en) 1989-04-20
DE3503622A1 (en) 1986-08-07
EP0190612B1 (en) 1989-03-15
DE3503622C2 (en) 1987-11-26
US4979729A (en) 1990-12-25

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