DE279610C

DE279610C -

Info

Publication number: DE279610C
Application number: DENDAT279610D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

zur Arbeitsstelle.to the job.

Die Erfindung bezieht sich auf eine Stanzmaschine mit Greifervorrichtung zum selbsttätigen Zuführen des Stanzgutes zur Arbeitsstelle. The invention relates to a punching machine with a gripper device for automatic Feeding the punched material to the work site.

Stanzvorrichtungen mit selbsttätiger An- und Ablegung sind an und für sich bekannt; sie sind aber in ihrer Leistungsfähigkeit sehr beschränkt, weil die Förderung des Stanzgutes nicht zwangläufig erfolgt und außerdemPunching devices with automatic application and removal are known per se; but they are very limited in their performance because of the promotion of the punched material not necessarily done and besides

ίο nur einzelne Bogen, nicht aber eine beliebige Anzahl von Bogen gleichzeitig bewegt werden können, ohne die Zuverlässigkeit der Vorschubeinrichtung noch weiter zu beschränken.
Man bedient sich bei den Maschinen bisheriger Art einfacher Förderbänder o. dgl, welche das Stanzgut bis an Anschläge mitnehmen und festhalten, bis die Stanzung vollendet ist, worauf dann nach Zurückziehen dieser Anschläge die Bänder die fertigen Arbeitsstücke aus der Maschine führen. Dabei ist dann noch eine besondere Vorrichtung notwendig, welche das Gut den Förderbändern zuführt. Meistens legt man von Hand außerhalb der Maschine die Bogen auf, und zwar ist dies bisher immer üblich, wenn mehrere Bogen gleichzeitig der Maschine zugeführt und gestanzt werden sollen.ίο only individual sheets, but not any number of sheets, can be moved simultaneously without further restricting the reliability of the feed device.
With the machines of the previous type, simple conveyor belts or the like are used, which take the material to be punched up to the stops and hold it until the punching is complete, whereupon the belts lead the finished workpieces out of the machine after these stops have been withdrawn. A special device is then required which feeds the goods to the conveyor belts. The sheets are usually placed outside the machine by hand, and this has always been the case up to now when several sheets are to be fed into the machine and punched at the same time.

Abgesehen davon, daß diese bekannten Vorrichtungen ziemlich umständlich' und in der Leistungsfähigkeit sehr beschränkt und unzuverlässig sind, verlangen sie außerdem noch einen Arbeiter, welcher das Stänzgut außerhalb der Maschine anlegt.Apart from the fact that these known devices are rather cumbersome 'and in the They are also very limited and unreliable a worker who places the material to be cut outside the machine.

Diese verschiedenen Mängel der bekannten Vorrichtungen beseitigt die vorliegende Erfindung und bringt so einen wesentlichen technischen Fortschritt durch die Steigerung der Leistung unter Ausschaltung des bedienenden Arbeiters. Es wird dies dadurch erreicht, daß das selbsttätig einem Behälter entnommene Stanzgut zwangläufig ohne Einschaltung von Zwischengliedern der Stanzstelle zugeführt und durch dasselbe Organ auch zwangläufig wieder ausgeschoben wird.The present invention overcomes these various deficiencies in known devices and thus brings a substantial technical advance by increasing the Performance with elimination of the serving worker. This is achieved in that the punched material automatically removed from a container inevitably without the involvement of Intermediate links fed to the punching point and inevitably again through the same organ is pushed out.

Zu diesem Zwecke ist die die Werkstücke fördernde Greifervorrichtung über der Arbeitsstelle zwischen den Stanzwerkzeugen bewegbar und legt bei ihrer Rückwärtsbewegung die von einem Stapel entnommenen übereinandergeschichteten Werkstücke ab und schiebt gleichzeitig die fertigen Werkstücke von der Stanzstelle mittels eines nach einer Richtung gegen Drehung gesicherten Auswerfgliedes weg. Die Förderwege werden auf diese Weise so kurz wie nur denkbar und damit ebenfalls die Arbeitszeiten. Um eine sichere Entnahme der Werkstücke vom Stapel zu gewährleisten, ist der Greifer, welcher auch in geöffneter Stellung frei oberhalb des angelegten Materials hinwegbewegt wird, mit einem festen Schenkel versehen, mit dem er an einem festen Abstreicherblech des Behälters entlang ein- und ausfährt.For this purpose, the gripper device conveying the workpieces is above the work site movable between the punching tools and sets the of stacked workpieces removed from a stack and pushes the finished workpieces off the at the same time Punching away by means of an ejector element secured against rotation in one direction. In this way, the transport routes are as short as imaginable, and so are the working hours. In order to ensure that the workpieces can be safely removed from the stack, the gripper, which is also in the open position is moved freely above the applied material, provided with a fixed leg, with which it moves in and out along a fixed scraper plate of the container.

Besonders vorteilhaft läßt sich die neue Vorrichtung ausbilden, wenn man sie mit einer an sich bekannten schrägen Arbeitsfläche ausbaut. Bei den bekannten Maschinen dieser Art legt man das Material oberhalb der Maschine an höchster Stelle meistens von Hand an. Unter Wirkung der Schwere, zum Teil auch beschleu-The new device can be designed to be particularly advantageous if it is connected to a known inclined work surface expands. In the known machines of this type lays the material above the machine is mostly done by hand at the highest point. Under Effect of gravity, sometimes also accelerated

Claims

The material slides through conveyor belts up to the work place from above into the machine, there is controlled by limit marks held for the duration of the operation and then slides again under the effect of the aforementioned after the marks have been withdrawn Funds from the machine.

These cumbersome, specially controlled marks can be used in the present invention

ίο be avoided. Because the material movement inevitably takes place in a machine, so can

■ the material in the opposite direction, d. H. from from the lowest point to the highest, to be lifted by the machine. To this end the workpiece stack is next to the lowest point of the work surface and is like this arranged that the gripper detects the bottom material to be punched and then under it after being raised Effect of gravity on the punching point against the shift downward limiting stops drops. At the same time, through the ejector element arranged on the gripper, the finished punched Sheets have been pushed out of the machine without hindrance because the limit marks do not hinder the upward movement are. The control of the limit marks is therefore completely eliminated. .

The invention is shown, for example, in the accompanying drawing and in the following further described. It shows

Fig. Ι a cross section through the punching device, Gripper in removal position,

Fig. 2 also shows a cross section, gripper opened shortly before the highest position and that Discarding material.

3 shows, as an example, a folding box to be punched out.

In the frame 1 of the punching machine, the lower tools 3 lie on the transverse webs 2.

The upper tools 4 are attached to the ram 5, which, guided in the frame 1, is supported by tie rods 6 and eccentric 7 in a known manner is moved up and down by a shaft 8. The automatic gripper, which consists of a fixed plate 9 and a movable leg 10 is in a on the machine frame 1 provided guide 11 held and for example by a rack 12 with a Gear drive 13 moved back and forth. Pinion 13 on shaft 14 is controlled by a crank 15, which is also driven by shaft 8, by means of rack 16 and a corresponding one Gear drive set in reciprocating motion. The amount of back and forth movement can be set by adjusting the crank pin 15 and .so the size of the workpieces be adjusted .. The circuit of the gripper is done by stops 17 and 18 by the Closing the gripper of the leg 19 connected to the movable arm 10 abuts at 17 and thereby with a third leg 20 brings a spring bolt 21 into effect in such a way that he. exerts a closing pressure on the inclined surfaces. In this position the gripper has in the underlying container sheet 22 detects and guides the same in its upward movement from the container onto the tools 3, with the upper fixed when exiting the container Gripper plate 9 slides past the scraper plate 23 and so more, not seized Prevents bow from following with out of the container. The upward movement of the gripper goes so far until the lower edge of the sheet 22 has come over a boundary mark 24, the arm 19 running against the stop 18 and the movable gripper arm 10, which can be rotated around bolts 25 in the fixed gripper guide, opens, the spring bolt 21 opening the gripper with the other side of the inclined surface holds. During this upward movement, the ejectors 26, which are attached to the gripper are rotatably arranged, the finished sheets 27 pushed out of the machine, where they are in a suitable Way can be collected. The rotatable ejectors 26 are shown in the drawing Example secured against movement to the right while moving to the left can give in. As a result, they become loose when the gripper goes down slide the applied arches.

Such a punching device will be able to handle the folding boxes used in large quantities completely automatically punched in a very economical way by the finished printed and placed the cut sheets in large layers in the lower container whereupon the automatic gripper, according to the setting, arches from this Fetch the container, take it to the work station immediately next to it and place it on the same will put down, whereupon he finished immediately in front of the sheet to be introduced Pushes pieces out. With consideration for these smallest paths and the inevitable movement only one organ can completely improve its performance compared to the known devices can be increased significantly.

Of course, the new invention would also apply to a machine with a horizontal work table work accordingly, even with a machine in which the storage container is on top lies, but in such cases there is still a special control of the limit marks necessary.

Pa ίέ ν τ - A ν s ρ R ü c η ε:

i. Punching machine with gripper device for automatic feeding of the punched material to the job, characterized in that the gripper device (9, 10) over the Work place between the punching tools

is movable and when it moves backwards the removed from a stack stacked workpieces on the punching point and at the same time the finished workpieces from the punching point by means of an ejector member secured against rotation in one direction (26) pushes away.

2. Punching machine with inclined work surface according to claim 1, characterized in that that the stack of workpieces is next to the lowest point of the work surface and is arranged in such a way that the gripper (9, 10) grips the respective lowermost S.danzgut and it after being raised under the action of gravity on the punching point against the displacement stores downward limiting stops (24).

3. Punching machine according to claim 1, characterized in that the gripper with a fixed leg (9) is provided and with this always at the same height on one fixed scraper plate (23) along the container moves in and out.

For this purpose ι sheet of drawings.