EP0438737B1 - Apparatus for cutting stacked material in sheet form with a lateral stop and a pusher movable against the lateral stop to align the material to be cut - Google Patents

Description

The invention relates to a device for cutting stacked, sheet-like material, with a table surface, which has a working area above which there is a cutting knife and a press beam, an input field for receiving the material to be cut and an output field for receiving the cut material , with a feed device for the material to be cut, which has teeth in its foremost position in the grooves of the press beam, and with a side stop for aligning the material to be cut by means of a pressure slide movable in the area of the working area in the direction of the cutting line.

Such a device is known from EP 0 242 763 A2. In this case, an automatically movable pressure slide is provided for pressing the material to be cut against the side stop, the effective width of the feed device being smaller than the distance between the side stop and pressure slide. Since the effective width of the feed device is shortened compared to the normal machine width, the pressure slide can remain in place without colliding with the feed device. The working distances of the pressure slide and its operating time are correspondingly short. Since it is operated automatically, the time interval until the subsequent cut can also be kept small. Overall, this configuration results in a transverse alignment with a minimum of time, and it also presents no difficulties in performing the alignment before each cut. It is also known from this document to arrange the pressure slide above the working area behind the pressure beam effective plane. In addition, it is proposed that the pressure slide can be moved first under this and then in the pressure direction when the pressure beam is raised, so that the pressure slide can be brought as close as possible to the cutting line.

A disadvantage of the known device that the feed device must be converted or replaced to adapt to different widths of the material to be cut, which is due to the required smaller effective width of the feed device compared to the distance between the side stop and pressure slide. The device can therefore only be used economically if constant batch formats have to be cut in large numbers.

When cutting stacked, sheet-like material, especially if this material is in strip form, it is considered to be particularly problematic in practice to have the good at almost Align the feed device in the foremost position exactly with the side stop. Even if the feed device is provided with teeth and the press bar with corresponding grooves, and the parts penetrate each other, there remains an area adjacent to the cutting plane below the press bar in which a pressure slide can only be used with great technical effort. This is particularly so because, in conventional devices of the type mentioned, the press beam is moved over tie rods arranged on the side of the table, which make it difficult to access the table surface arranged below this area of the press beam.

It is an object of the present invention to develop a device of the type mentioned so that, with a simple structural design of the device in the area of the feed device, press beam, side stop and pressure slide, alignment of the material to be cut is ensured in the immediate vicinity of the cutting plane.

The object is achieved in that the feed device extends essentially over the entire width of the table surface and the pressure slide is effective only in the area of the working field formed between the cutting plane and the foremost position of the feed device. The design of the device according to the invention initially enables any stack formats to be cut without changing or replacing the feed device. As a result, the device can be designed universally in the area of the feed device and can have, for example, the usual spindle-operated feed saddles known from face cutting machines. In contrast to the prior art, the pressure slide is only effective in the area of the working area that cannot be reached by the feed device, which means that the pressure slide is relatively narrow. By the arrangement of the pressure slide in the immediate vicinity of the cutting plane can be of any narrow use, be it use that extends across the entire width of the table or use in the form of block strips exactly aligned with the side stop. In order to be able to use any format, the pressure slide should be able to move essentially over the entire width of the table, at least up to the vicinity of the side stop.

A special embodiment of the invention provides that the pressure slide is connected to a push rod arranged above the table surface and parallel to the cutting plane in the direction of the cutting line. The push rod can be formed by the piston rod of an actuating cylinder, in particular a pneumatically actuated actuating cylinder, which is arranged outside the working area. The positioning cylinder is advantageously attached to the side of the table or to a portal frame of the device which receives the knife and the press beam. There is also the possibility of designing the push rod as a rack, with which a gear wheel of a power means arranged outside the working field, for example an electric servomotor, interacts.

The pressure slide can, for example, be arranged parallel to the side stop and rigidly connected to the end of the push rod facing the side stop. Since the pressure slide, in order to fulfill its function, stands above the stack to be cut, this rigid arrangement of the pressure slide means that it has to be moved out of its effective area before the pressure beam is lowered. Another advantageous embodiment provides that the push rod is arranged directly adjacent to the table surface and the pressure slide is pivotally connected about a horizontal axis to the end of the push rod facing the side stop. Here the pressure slide removed in a simple manner from the effective area of the press beam by pivoting it under the upper boundary surface after the stack to be cut has been aligned, with which it can remain in the immediate vicinity of the stack to be cut. In this embodiment, an adjusting means is provided for pivoting the pressure slide between the vertical working position and in particular an essentially horizontal rest position. The adjusting means should be designed as a rod which can be actuated by means of a force and which acts on the pressure slide at a distance from the pivot axis thereof. In order to ensure a defined position of the pressure slide in its working position, it is considered advantageous if it is supported in this position via a bearing surface on a corresponding bearing surface of the push rod.

The height of the pressure slide should be based on the maximum height of the material to be cut that can be processed in the device. In this sense it is provided that the pressure slide extends in its working position substantially from the table surface to slightly below the raised press beam.

The push rod is advantageously arranged between the cutting plane and a pull rod for the press beam. Despite the small space between the cutting plane, that is the cutting knife and the feed device and the mechanism for actuating the pressure beam, there is thus sufficient space for the defined movement of the pressure slide.

Further features of the invention are shown in the description of the figures and in the subclaims, it being noted that all individual features and all combinations of individual features are essential to the invention.

In the figures, the invention is illustrated, for example, on the basis of a basic embodiment with two partial variants, without being limited to this embodiment.

Figur 1

eine stark vereinfachte Darstellung einer Planschneidemaschine zum Schneiden von Papier, Pappe oder dgl. in einer Draufsicht für die erste Teilvariante bei außerhalb des Arbeitsfeldes befindlichem Andruckschieber,

Figur 2

eine Darstellung gemäß Figur 1 mit in Funktion befindlichem Andruckschieber,

Figur 3

eine Stirnansicht A gemäß Figur 2, ohne Vorschubeinrichtung gezeigt,

Figur 4

eine Figur 3 entsprechende Ansicht für eine zweite Teilansicht des Andruckschiebers, gezeigt in dessen Arbeitsstellung,

Figur 5

eine Darstellung gemäß Figur 4 mit geringfügig vom zu schneidenden Gut entferntem Andruckschieber zur Verdeutlichung der Schwenkposition des Andruckschiebers und

Figur 6

eine Detaildarstellung B gemäß Figur 5 zur Verdeutlichung des Zusammenwirkens von Schubstange, Andruckschieber und Stange zum Betätigen des Andruckschiebers.

It shows:

Figure 1

a greatly simplified illustration of a face cutting machine for cutting paper, cardboard or the like in a top view for the first partial variant with the pressure slide located outside the working area,

Figure 2

2 shows a representation according to FIG. 1 with the pressure slide in operation,

Figure 3

3 shows an end view A according to FIG. 2, shown without a feed device,

Figure 4

3 shows a view corresponding to FIG. 3 for a second partial view of the pressure slide, shown in its working position,

Figure 5

a representation according to Figure 4 with the pressure piece to be cut slightly removed to illustrate the pivoting position of the pressure slide and

Figure 6

a detailed representation B according to Figure 5 to illustrate the interaction of the push rod, pressure slide and rod for actuating the pressure slide.

In FIG. 1, a table 1 with a table surface 2 is shown for the face cutting machine, which is subdivided into an input field 2a, a working field 2b and an output field 2c. The input field 2a serves to receive the material to be cut, above the working field 2b there is a press beam 3 received by a portal frame of the cutting machine (not shown) and a cutting knife 4 only shown in broken lines. Reference number 4a is the cutting plane of the cutting knife 4 clarifies. The output field 2c serves to receive the cut material. In the input field 2a, a feed device in the form of a feed saddle 5 is mounted so that it can be moved in the feed direction C. The width of the feed saddle 5 is only insignificantly smaller than the narrow edges 6 of the table 1 that define the width of the table 1. On the side facing the press beam, the feed saddle is comb-shaped in plan view and thus has a large number of equally spaced teeth 7 (see also Figure 2). Correspondingly, the press beam 3 is provided on its side facing the feed saddle 5 with grooves 8 into which the teeth 7 can engage. In Figure 1, the maximum advanced position of the feed saddle 5 is shown, that is, the closest position that the feed saddle 5 can assume with respect to the cutting plane 4a. In this, the teeth 7 of the feed saddle 5 fully engage in the grooves 8 of the press beam 3, so that a space remains below the groove-free area 3a of the press beam 3.

In order to be able to align material 9 to be cut in this free space on a side ruler 14, a pressure slide which can be moved in the direction of the cutting line - likewise illustrated by reference number 4a in the plan view according to the illustration in FIGS. 1 and 2 - is movable against the material 9 to be cut 10 provided. As shown in FIGS. 1 to 5, the pressure slide 10 is connected to a push rod 11 which is arranged above the table surface 2 and can also be moved parallel to the cutting plane 4a in the direction of the cutting line. The push rod is designed as a toothed rack, with which a toothed wheel (not shown in detail) of a servomotor 12 arranged outside the working field 2b interacts. This and thus also the push rod 11 are arranged between one of the two tie rods 13 for pulling down the press beam 3 and the cutting plane 4a.

For the first partial variant, it is shown in FIGS. 1 to 3 that the push rod 11 is rigidly connected to the plate-shaped pressure slide 10 in the region of the center thereof. The pressure slide 10, which is arranged parallel to the side stop 14, extends essentially from the table surface 2 to slightly below the raised pressure beam 3 and thus makes it possible to align any stack that can be processed with the device because of the area of the pressure slide 10 projecting above the material 9 to be cut.

FIGS. 2 and 3 illustrate the conditions for the last cut of five block strips 9a to 9e which takes place in the immediate vicinity of the cutting knife 4. The block strips are advanced to the cutting plane 4a by means of the feed saddle 5 when the pressure slide 10 is moved out of the working area 2b. Then, as shown in FIG. 2, the push rod 11 is extended with the pressure slide 10 until it lies against the outside of the block strip 9a and the good 9 to be cut presses against the side ruler 14 and aligns it laterally. This position is also illustrated in the front view according to FIG. 3. After aligning the pressure slide 10 is moved back from the area below the press beam 3 to the position shown in dashed lines, then the side stop 14 is lowered in the direction of the arrow, the press beam is pressed down by the action of the tie rods 13 in the direction of the arrow on the material to be cut, finally this is done Cut using the cutting knife 4.

Figures 4 to 6 illustrate an alternative arrangement of the expression slide 10 on the push rod 11. The representation of the actuating means for the press beam 3 has been omitted. As can be seen from these figures, the push rod 11 is arranged there directly adjacent to the table surface 2 and the pressure slide 10 can be pivoted about a horizontal axis 15 connected to the end of the push rod 11 facing the side stop 14. As illustrated in the illustration in FIG. 6, in addition to the push rod 11, a further rod 16 is guided, with which the pressure slide can be pivoted counterclockwise by a maximum of 90 °, thus into a horizontal position. For this purpose, the rod 16 acts on a shoulder 17 of the pressure slide 10 at a distance from the pivot axis 15. This is provided at its lower end with a 45 ° bevel 18a, which comes into contact with a corresponding 45 ° bevel of the push rod 11 in the vertical position of the pressure slide 10 and thus fixes it in a defined manner. The means for moving the rod 16 are not clarified in detail, this can be moved, for example, by means of a pneumatic cylinder, the rod 16 could represent its piston rod. An essential advantage of the variant according to FIGS. 4 to 6 is that the pressure slide 10 does not have to be completely retracted before the pressure beam 3 is pressed down, but that folding in the pressure slide 10 after its slight movement from the stack of material to be cut is sufficient.

Reference list

1

table

2nd

Table surface

2a

Entrance field

2 B

Field of work

2c

Starting field

3rd

Press beam

3a

Area

4th

Cutting knife

4a

Cutting plane

5

Feed saddle

6

Narrow edge

7

tooth

8th

Groove

9

good to be cut

9a to 9e

Block strips

10th

Pressure slide

11

Push rod

12th

Servomotor

13

pull bar

14

Side stop

15

axis

16

pole

17th

approach

18a

Weird

18b

Weird

Claims (13)

1. A device for cutting stacked sheet material (9), with a table area (2) which has a field of action (2b) above which a cutting knife (4) and a crosshead (3) of a press are located, an input field (2a) behind it for receiving the material to be cut (9) and an output field (2c) in front of it for receiving the cut material, with a forward feed device (5) for the material to be cut (9), which forward feed device has teeth (7) which in its frontmost position engage in slots (8) in the crosshead (3) of the press, and with a lateral stop (14) for aligning the material to be cut (9) by means of a contact pressure slide (10) which can move in the region of the field of action (2b) in the direction of the cutting line, characterised in that the forward feed device (5) extends substantially over the entire width of the table area (2) and the contact pressure slide (10) acts exclusively in the region of the field of action (2b) formed between the cutting plane (4a) and the frontmost position of the forward feed device (5).
2. A device according to claim 1, characterised in that the contact pressure slide (10) is movable over substantially the entire width of the table.
3. A device according to claim 1 or 2, characterised in that the contact pressure slide (10) is attached to a slide rod (11) which is disposed above the table area (2) and which can be moved parallel to the cutting plane (4a) in the direction of the cutting line by a means of power.
4. A device according to claim 3, characterised in that the slide rod (11) is formed by the piston rod of an adjusting cylinder, particularly a pneumatically operable adjusting cylinder, which is disposed outside the field of action (2b).
5. A device according to claim 3, characterised in that the slide rod (11) is formed as a toothed rack with which a toothed wheel of a means of power (12) disposed outside the field of action (2b) cooperates.
6. A device according to any one of claims 3 to 5, characterised in that the contact pressure slide (10) is disposed parallel to the lateral stop (14) and is rigidly attached to the end of the slide rod (11) facing the lateral stop (14).
7. A device according to any one of claims 3 to 6, characterised in that the slide rod (11) is disposed directly adjacent to the table area (2) and the contact pressure slide (10) is attached, so that it can swivel about a horizontal axis (15), to the end of the slide rod (11) facing the lateral stop (14).
8. A device according to claim 7, characterised in that an adjusting means (16) is provided for swinging the contact pressure slide (10) between its vertical operating position and a substantially horizontal inoperative position.
9. A device according to claim 8, characterised in that the adjusting means (16) is constructed as a rod which can be operated by a means of power and which acts on the contact pressure slide (10) at a distance from the swivelling axis (15) of the latter.
10. A device according to any one of claims 7 to 9, characterised in that the contact pressure slide (10) is supported in its operating position via a bearing area (18a) on a corresponding bearing area (18b) of the slide rod (11).
11. A device according to any one of claims 1 to 10, characterised in that in its operating position the contact pressure slide (10) extends substantially from the table surface (2) to slightly below the raised crosshead (3) of the press.
12. A device according to any one of claims 3 to 11, characterised in that the slide rod (11) is disposed between the cutting plane (4a) and a connecting rod (13) for the crosshead (3) of the press.
13. A device according to any one of claims 1 to 12, characterised in that the lateral stop (14) can be moved, and in particular can be tilted downwards, out of the path of movement of the crosshead (3) of the press.

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