EP2656985A1 - Cutting machine for cutting stacked, sheet-shaped goods - Google Patents

Abstract

The cutting machine (1) has a table (4) for placing the material on a table surface (5) of the table, a movable jacking beam (7) arranged above the table surface and an element which covers the jacking beam on its side facing the table surface and is connected with the jacking beam. The material is clamped between the jacking beam and the table during lowering the jacking beam. A movable blade (6) for cutting through the material is arranged above the table surface and adjacent to the jacking beam and the element. The blade has a cutting plane perpendicular to table surface. The element has a light guiding region to the cutting plane and a light source for supplying light in the light guiding region.

Description

The invention relates to a cutting machine for cutting stacked, sheet-like Good, with a table for placing the Guts on a table surface of the table, arranged above the table surface, movable pressing beam, an element that covers the pressing beam on its side facing the table surface and with the pressing beam is connected, wherein the Good when lowering the press beam-between this and the table is clamped, as well as with a above the table surface and adjacent to the pressing beam and the element arranged movable knife for cutting the Guts, with a cutting plane of the knife perpendicular to the table surface.

A cutting machine for cutting stacked, sheet-shaped Good is from the DE 31 01 911 A1 known. It has a table for placing the Guts on a table surface of the table and arranged above the table surface, lowerable pressing beam. The press beam serves to clamp the material when lowering the press beam between itself and the table. Above the table surface and adjacent to the pressing beam, a knife is provided for cutting the material in a cutting plane perpendicular to the table plane. With this cutting machine benefit cuts and between them waste cuts can be performed.

The cut to be cut, stacked, sheet-shaped Good is usually available as a cuboid. This cuboid cut product stack is formed by a large number of identical, relatively large, printed sheets. The stack is to be cut in a cutting sequence resulting from the printed sheets, wherein cutting marks are integrated in the printed image. In order for the operator of the cutting machine knows exactly where the knife cuts the stack when lowering, a so-called Schnittandeutungsfunktion is provided on the machine. By means of a foot pedal of the cutting machine, the operator can lower the pressing bar so far in the direction of the stack to be cut until the pressing bar is arranged at only a slight distance above the stack. Because of this immediate proximity of the press bar to the stack, with the front operator facing edge of the press bar being a reference to the cutting plane of the cutting knife, the operator can determine if the stack is exactly aligned with the front contour of the press bar or if it is required. Slightly align the stack below the press bar in cutoff position that the cutting marks of the top printed sheet are aligned exactly with the leading edge of the press bar.

In this approach of the Schnittandeutens has the disadvantage to be noted that the far-reaching compressed beam, which is only a short distance from the stack, the area above the stack darkens and this area, also relative to the front of the press bar, is relatively darkened. Attempts have therefore already been made to arrange in a portal frame in the cutting machine, in which both the pressing beam and the cutting blade are movably mounted, above the press beam on the side facing the knife one or more light sources from the top of the area in front of the illuminate the stack to be cut. As a result, however, the front edge of the press bar, which faces the operator of the cutting machine, can not be contoured.

A cutting machine having the features of the aforementioned type is known from GB 935,863 known. In this, the element which covers the pressing beam on its side facing the table surface and is connected to the pressing beam, formed elastically. When lowering the press beam thus the material to be cut, therefore the stack is clamped between the elastic, in particular elastic, plate-shaped element and the table. When the elastic element acts on the stack, damage to the topmost sheet or sheets of the stack can be avoided. Thus, application areas of the cutting machine are recorded, in which the stacked Good is not strictly cuboid, but has a corrugated stacking surface. This is especially the case when the stack is formed from individual printed sheets. The pressure causes a slightly thicker formation of the respective sheet in the region of pressure, so that when superposed a plurality, optionally more than one thousand sheets on top of each other, the accumulation of material due to the pressure to a wave-shaped formation of the upper surface of the stack. In order to prevent that the clamping bar comes to lie only partially on the corrugated surface of the stack when clamping the material to be cut, in this known cutting machine, the element is elastic and can thus adapt to the surface contour of the stack.

Object of the present invention is to improve a cutting machine of the type mentioned above so that a particularly good quality Schnittandeutung with almost lowered to the material to be cut lowered arrangement of pressing beam and element is possible.

The object is achieved with a cutting machine of the type mentioned above in that the element has an at least to the cutting plane light-conducting area, and at least one light source for feeding light is provided in this photoconductive region of the element.

If, in the cutting machine according to the invention, the at least one light source is switched on, this leads to the light reaching the region of the element facing the cutting plane. This area of the element facing the cutting plane can thus be recognized by the operator as illuminated. If the press bar is lowered with the element in the direction of the material to be cut, in particular of the stack to be cut, just above the good or stack, results in the operator a sharp light contour in the region of the element with respect to the top sheet of the material to be cut and so with respect to the visible on this top sheet cutting marks. The operator can easily determine whether the stack is exactly aligned with respect to the element and thus the cutting plane of the knife due to the exact light contour of the element in an illuminated, the operator facing area, or by moving, possibly by slight twisting a correction is to be made of the material to be cut or the stack to be cut, so that the exact Ausrichtmaß the good is adjustable. Accordingly, at the Cutting machine according to the invention provide no additional light source in the range of a portal frame. On the contrary, the element which has the area which conducts light at least to the cutting plane gives the illuminated contour with respect to the material to be cut or the stack to be cut.

It is considered to be particularly advantageous if the element not only has the photoconductive region towards the cutting plane, but also has a region which leads to the table in terms of light. As a result, the light fed into the element by means of the at least one light source also reaches the region of the element which faces the table surface directly under the pressing beam. This is thus also illuminated by means of the light emerging from the element and is therefore well lit even when the pressing beam is in its fully raised position. In the process of Schnittandeutens the downward lighting by means of the element is not a hindrance, because if the element is arranged at a minimum distance to the trimming Good or stack to cut, no light emerging from the item to Schneidgut the operator hides. The operator only perceives the light that exits through the light-guiding region of the element facing the cutting plane.

The element may consist partially or entirely of light-conducting material. This light-conducting material is preferably a transparent plastic. If the element consists only partially of photoconductive material, this is arranged in the region of the element which faces the cutting plane. Even in this case, the element may have such an extent perpendicular to the cutting plane that light from the element also radiates down in the direction of the table surface. It is considered preferable if the element consists entirely of photoconductive material. It thus covers in this case, the bottom of the press bar completely, which is pressed the material to be cut between the light-conducting element and the table during the cut. Basically, it would be quite possible that Form element so that it extends over a partial length of the press beam, measured perpendicular to the cutting plane. If the lower surface of the element forms a plane with the lower surface of the press beam, then when cutting the stacked sheet material, it is clamped between the element and the press beam. It is also possible that in this basic design of the element this ends with its lower surface above the lower surface of the press beam, so that when cutting the sheet-like Guts this is clamped only between the press bar and the table. In this case, the element is positioned slightly above the crop when cutting.

Preferably, a plurality of light sources are arranged adjacent to the element on the side of the element facing away from the table. Thus, the light can be fed into the light-conducting region of the element in a short path.

The at least one light source, in particular in all light sources, is in particular an LED light source or LED light sources.

The arrangement of the pressing beam and element can be designed differently.

Thus, a preferred embodiment provides that the element is indirectly connected to the pressing beam, wherein the element is connected to a support plate on the underside thereof, wherein the support plate is detachably connected to the underside of the press beam.

In this case, the support plate, for example, on its upper side bearing pin for insertable storage of the support plate in the press bar.

In particular, it is provided that the support plate on its side facing the element one or more recesses for receiving a or a plurality of light sources, in particular one or more LEDs, for feeding light into the element.

According to a preferred embodiment, it is provided that the support plate has a recess extending substantially over the length of the support plate or groove or a plurality of spaced apart in the region of the long side of the support plate recesses for the light source or the light sources parallel to the cutting plane.

According to a preferred alternative embodiment it is provided that the element is connected directly to the pressing beam.

Here, it is considered to be particularly advantageous if the pressing beam on its side facing the element has one or more recesses for receiving one or more light sources, in particular one or more LEDs, for feeding light into the element.

In particular, the pressing beam has, parallel to the cutting plane, a recess or groove extending substantially over the length of the pressing beam or a plurality of recesses for the light source or light sources arranged at a distance from one another in the region of the long side of the pressing beam.

If, according to a preferred embodiment, the element is connected indirectly to the pressing beam, it is possible to retrofit the pressing beam with the element. In the other embodiment, in which the element is directly connected to the pressing beam, form the pressing beam and element from the outset a structural unit.

Constructively, the element is designed in particular so that it is plate-shaped or concretely formed as a plate. In particular, the plate has a rectangular main surface. The long side of this main surface is arranged parallel to the cutting plane and the short side at right angles to the cutting plane.

In particular, the element is designed so that the cutting plane facing side of the element forms a flat end face. This is arranged in particular parallel to the cutting plane. If, however, the face of the element is not arranged parallel to the cutting plane in its photoconductive region pointing toward the cutting plane, this side of the element is arranged parallel to the cutting plane, in particular with respect to a straight, lower edge facing the cutting plane. This edge, or in parallelism of the end face to the cutting plane, the lower edge of this end face can be detected as a reference line or reference surface in the detection of the position of the press beam or the element at the Schnittandeutung by the operator.

Further features of the present invention are illustrated in the description of the following drawing, the drawing itself and in the dependent claims, wherein it is noted that all individual features and all combinations of individual features are essential to the invention.

In the drawing, the cutting machine according to the invention is illustrated with reference to two preferred embodiments, without being limited thereto:

Figur 1

eine schematische Darstellung einer erfindungsgemäßen Schneidemaschine, die als Planschneidemaschine ausgebildet ist, gezeigt in einer Frontansicht, somit von der Bedienerseite gesehen,

Figur 2

für die eine Ausführungsform der Schneidemaschine eine Schnittdarstellung der Anordnung von ganz aus lichtleitendem Material bestehendem Element und dieses Element aufnehmender Trägerplatte, geschnitten gemäß Linie II-II in Figur 3,

Figur 3

die Anordnung gemäß Figur 2, geschnitten gemäß der Linie III-III in Figur 2,

Figur 4

eine Ansicht der Anordnung gemäß Pfeil IV in Figur 2,

Figur 5

ein Schnitt durch die für das Verständnis der vorliegenden Erfindung relevanten Bauteile, senkrecht zur Schneidebene gesehen, für die veranschaulichte erste Ausführungsform, bei vollständig angehobenem Pressbalken und vollständig angehobenem Schneidmesser,

Figur 6

die Anordnung gemäß Figur 5, bei in die Schnittandeutungsposition abgesenktem Pressbalken und teilweise abgesenktem Schneidmesser,

Figur 7

für die zweite Ausführungsform die Anordnung gemäß Figur 5 in der in Figur 5 veranschaulichten Stellung von Pressbalken und Schneidmesser,

Figur 8

die Anordnung gemäß Figur 7 für die Schnittandeutungsposition gemäß Figur 6.

It shows:

FIG. 1

1 is a schematic representation of a cutting machine according to the invention, which is designed as a plan cutting machine, shown in a front view, thus seen from the operator side,

FIG. 2

for the one embodiment of the cutting machine is a sectional view of the arrangement of entirely of light-conducting material existing element and this element receiving carrier plate, cut according to line II-II in FIG. 3 .

FIG. 3

the arrangement according to FIG. 2 , cut according to the line III-III in FIG. 2 .

FIG. 4

a view of the arrangement according to arrow IV in FIG. 2 .

FIG. 5

a section through the components relevant to the understanding of the present invention, seen perpendicular to the cutting plane, for the illustrated first embodiment, with fully raised pressing beam and fully raised cutting blade,

FIG. 6

the arrangement according to FIG. 5 with the pressing beam lowered in the cutting position and the blade partially lowered,

FIG. 7

for the second embodiment, the arrangement according to FIG. 5 in the in FIG. 5 illustrated position of pressing beam and cutting blade,

FIG. 8

the arrangement according to FIG. 7 for the cutting edge position according to FIG. 6 ,

In the FIG. 1 shown cutting machine 1, which is designed as a plan cutting machine, is used to cut stacked, leafy Good, especially those of paper, cardboard, films or the like. The individual sheets are in particular printed, so that a multiplicity of cuts are to be made on the overall stack, in particular in cuboid form, for the formation of partial stacks, optionally with insertion of intermediate cuts with waste disposal. The respective sheet is provided with cutting marks, serve as a guide for the exact alignment of the stack to be cut with respect to the cutting blade or the press beam or the cutting plane to the operator of the machine. In this aspect, the present invention is to be seen, specifically the Schnittandeutung with almost completely lowered onto the stack to be cut bar, where the operator can align the stack to be cut with the relevant cutting marks.

The cutting machine has a stand 2 with upper portal frame 3, and a table 4. The table 4 is provided with an upper, horizontal table surface 5, which serves to receive the stack, be it one or more stacks of material to be cut or one or more Stack sliced Guts. The table surface 5 thus extends perpendicular to the plane of the drawing sheet. In the portal frame 3, a lowering and liftable cutting blade 6 is mounted, behind which a pressing beam 7 is also raised and lowered in the portal frame 3. The press beam serves to fix the material to be cut by the pressing bar 7 in the lowered position presses the stack of products against the table. Under the aspect of the present invention, the pressing of the stack of products against the table 4 can take place directly above the pressing bar 7 or indirectly by means of a light-conducting element to be described in more detail.

The cutting blade 6 is in the swinging section of the in FIG. 1 illustrated upper end position movable in a lower end position in which it penetrates into a recorded by the table 4 cutting bar. The pressing beam 7 is by means of a drive from the in FIG. 1 illustrated, raised position lowered into the lowered, directly or indirectly resting on the stack position. In the raised positions of knife 6 and pressing bar 7, the pressing bar 7 extends slightly below the level of the knife 6, so that the knife edge is not exposed. The cutting blade 6 is driven by means of a crank mechanism, through which the cutting blade 6 is pulled in the swinging section. The drive motor for the cutting blade 6 is in the lower right Arranged portion of the portal frame 2 and accessible through an opening in the portal frame 3, which closes a flap 8. In the area of the rear table part, a feed device is arranged which has a feed saddle 9 with front calculating section 10, which is designed in a known manner and which serves to advance the stack to be cut in the direction of the operator, perpendicular to the cutting plane. The side of the feed saddle 9 facing the operator runs parallel to the cutting plane of the cutting blade 6. The feed saddle 9 can be moved forwards and backwards in the region of the rear part of the table. In the upper, horizontally extending portion of the portal frame 3 this is provided with a control and information display 11. The cutting machine 1 is actuated by two-handed operation by two control buttons 12 are provided in the front region of the table 4, at a distance from each other. This basically ensures that the operator, when operating the cutting machine 1 and thus when triggering the cut, can not get into the area of the cutting blade 6 with his hands. The cutting machine is provided in the region of both sides with side stops 13 for positioning the material to be cut at one or the other stop.

Below the cutting blade located in the raised position 6 and press bar 7 between these and the table surface 5, an opening 14 in the portal frame 3 is formed. The maximum dimension of the material to be cut in width and height is limited by this opening 14. Arranged laterally of the opening 14 are arrangements 15, which, at the same starting position, are arranged symmetrically to a central plane 16, which is arranged perpendicular to the cutting plane, thus perpendicular to the drawing sheet. The respective arrangement 15 is essentially formed by a light barrier housing 17, a light barrier 18 accommodated by the light barrier 18 and a cover element 19, the cover element 19 being pivoted into the passage of the light barriers during maintenance work on the cutting machine 1.

At the front, near the ground, the cutting machine 1 has a pedal 20 to be operated by the operator for triggering the function of the cut indication. By more or less pressing the pedal, the pressing bar 7 can be moved into the Schnittandeutungsfunktion just above the stack to be cut so that above the top sheet of the stack a small gap to the pressing bar 7 remains.

FIG. 5 shows for the first embodiment, the cutting machine 1, the table 4 with upper, horizontally arranged table surface 5 and resting on the table surface 5, to be cut, stacked, sheet-shaped Good, which is formed as a cuboid Schneidgutstapel 21. The stack 21 consists of a plurality of superimposed, identical sheets that are printed, for example, of a thousand stacked sheets, with individual sheets 22 and also substantially thicker illustrated only for reasons of clarity of drawing.

Above the table surface 5 are arranged and in the raised position illustrates the pressing bar 7 and adjacent to this, the cutting blade 6, which is mounted in a blade holder 32. The cutting blade 6 is arranged on the operator-facing side of the press beam 7. The cutting plane, which is perpendicular to the plane of the drawing sheet, is illustrated by the dashed line 23.

In the area of the arranged parallel to the table surface 5 bottom surface of the press beam 7 is located on this a plate-shaped support 24, with its underside, which is also parallel to the table surface 5, a plate-shaped element 25 is connected, whose underside is also arranged parallel to the table surface 5 , This element 25 is made entirely of light-conducting material, in particular it consists of transparent plastic.

The construction and the arrangement of carrier 24 and element 25 is the representation of FIGS. 2 to 4 can be seen: The carrier 24 is on its top provided with two bearing pin 26 for insertable bearings of the support plate 24 in corresponding openings in the pressing beam 7. A mechanism for fixing these bearing pins 26 in the receptacles of the press beam 7 is not illustrated. As a result, the support plate 24 is subsequently connected to the pressing beam 7 and connected in a connected position fixed to the pressing bar 7. The support plate 24 has on its rectangular bottom 27, wherein the longitudinal side is positioned parallel to the cutting plane 23, on the operator-facing side of the bottom 27 a plurality of recesses, each recess receives an LED 28. The respective recess is slightly larger than the respective LED 28, so that the recess is not numbered. The LEDs 28 are thus arranged substantially over the entire length of the carrier 24. A connected to an external power source power cable 29 is guided to the carrier 24 and the LEDs 28 connected to this power cable 29. On the underside of the support plate 24 covers this made of transparent plastic element 25 from. The element 25 is also rectangular and it corresponds to the surface of the element 25 of the facing surface of the carrier 24th

When the LEDs 28 are lit, light from them is thus fed into the light-conducting element 25, so that the cutting plane 23 facing, vertically oriented end face 30 of the element 25 can be viewed by the operator. The operator thus perceives this end face 30 as a narrow illuminated straight surface with a straight lower edge, which is arranged parallel to the cutting plane 23 and parallel to the table surface 5. On the other hand, the entire lower main surface 31 of the element 25, which is parallel to the table surface 5, is illuminated and light comes out through this main surface 31.

For the condition according to FIG. 5 With the press beam 7 raised and the cutting blade 6 raised, this means that light is emitted from the element 25 downwards onto the stack 21 via the main surface 31, so that the top side of the stack (21) or the region below the press beam 7 is brightly illuminated. The operator can thus with particularly favorable optical conditions basically handle the stack 21 on the table 4. Operates the operator, for the purpose of Schnittandeutung the pedal 20, the press bar 7 lowers in the position according to FIG. 6 from, in which this remains at a small distance from the stack 21 according to gap 33 above this. As a result, the main surface 31 of the element 25 is virtually covered by the uppermost arch 21 of the stack 21, so that the operator then only sees the illuminated end surface 30 as the illuminated region of the element 25. At this light line, the operator can then align the stack 21, which, since the stack 21 is not pressed between the element 25 and the table 4 at the Schnittandeutung, can be moved and / or rotated.

The second embodiment according to the FIGS. 7 and 8 is different from the one after the FIGS. 2 to 6 only in that the plate-shaped element 25 is not held in the carrier 24, but the plate-shaped element 25 is attached directly to the pressing beam 7, wherein the recesses receiving the LEDs 28, directly in the pressing beam 7 on its underside adjacent the cutting plane 23rd are introduced. The guidance of the power cable 29 is also carried out directly in the pressing beam 7 to the LEDs 28 located in the recesses. FIG. 7 shows the press bar 7 in the raised position, which, when the LEDs 28 are illuminated, in particular over the main surface 31 of the element 25, the stack 21 is illuminated from above. FIG. 8 illustrates the situation at the Schnittandeutung upon actuation of the pedal 20, wherein, according to the FIG. 4 in that the element 25 is lowered into a position just above the stack 21, so that only the end face 30 is perceived by the operator as an illuminated narrow surface with a lower edge, which is arranged parallel to the cutting plane and parallel to the table surface.

The FIGS. 5 to 8 illustrate beyond that the cutting plane facing end faces 34 of the pressing beam 7 and element 25, optionally when using the carrier 24, are arranged on the end side at a minimum distance from the cutting plane. Therefore, the end face 30 of the Element 25 is ideally suited to indirectly indicate to the operator the orientation of the stack 21 to the cutting plane 23.

Claims (14)

Cutting machine (1) for cutting stacked, sheet-like material (21), comprising a table (4) for placing the product (21) on a table surface (5) of the table (4), a movable above the table surface (5) Press bar (7), an element (25) which covers the pressing bar (7) on its side facing the table surface (5) and is connected to the pressing bar (7), wherein the good (21) during lowering of the press bar (7) between this and the table (4) can be clamped, and with a above the table surface (5) and adjacent to the pressing bar (7) and the element (25) arranged, movable knife (6) for severing the Guts (21), with a Cutting plane (23) of the knife (6) perpendicular to the table surface (5), characterized in that the element (25) at least a cutting plane (23) towards the light-conducting region (30), and at least one light source (28) for feeding Light is provided in this photoconductive region (30) of the element (25) is. Cutting machine according to claim 1, characterized in that the element (25) has a table (4) to the light-conducting region (31). Cutting machine according to claim 1 or 2, characterized in that the element (25) partially or wholly of photoconductive material, in particular of transparent plastic. Cutting machine according to one of claims 1 to 3, characterized in that on the side facing away from the table (4) of the element (25) a plurality of light sources (28) adjacent to the element (25) are arranged. Cutting machine according to one of claims 1 to 4, characterized in that the at least one light source (28), in particular all the light sources (28), are LED light sources (28). Cutting machine according to one of claims 1 to 5, characterized in that the element (25) is indirectly connected to the pressing bar (7), wherein the element (25) is connected to a carrier (24), in particular a carrier plate, on its underside wherein the carrier (24) is releasably connected to the underside of the press beam (7). Cutting machine according to claim 6, characterized in that the carrier (24) on its upper side bearing pin (26) for insertable bearings of the carrier (24) in the pressing bar (7). Cutting machine according to claim 6 or 7, characterized in that the carrier (24) on its side facing the element (25) one or more recesses for receiving one or more light sources (28), in particular one or more LEDs (28), for feeding of light in the element (25). Cutting machine according to claim 8, characterized in that the carrier (24) parallel to the cutting plane (23) extending over the length of the carrier (24) extending recess or a plurality of spaced apart in the region of the long side of the carrier (24) Recesses for the light source (28) and the light sources (28). Cutting machine according to one of claims 1 to 5, characterized in that the element (25) is directly connected to the pressing beam (7). Cutting machine according to claim 10, characterized in that the pressing beam (7) on its the element (25) facing side or a plurality of recesses for receiving one or more light sources (28), in particular one or more LEDs (28), for feeding light into the element (25). Cutting machine according to claim 10 or 11, characterized in that the pressing beam (7) parallel to the cutting plane (23) extending over the length of the press beam (7) extending recess or a plurality of spaced apart in the region of the long side of the press beam (7 ) arranged recesses for the light source (28) or the light sources (28). Cutting machine according to one of claims 1 to 12, characterized in that the element (25) is plate-shaped or formed as a plate, in particular a main surface (31) which is rectangular. Cutting machine according to one of claims 1 to 13, characterized in that the cutting plane (23) facing side of the element (25) forms a flat end face (30) which is arranged in particular parallel to the cutting plane (23).

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