EP1172185A1 - Device for cutting sheet material - Google Patents

Abstract

Device for cutting leaf-like material comprises a supporting frame (1), a knife (6) that can move up and down, linear guides (13) for a knife support (7), and drives for moving the knife support. Each linear guide has an outer guiding rail pair (25) connected to the frame and an inner guiding rail (26) restricted in the outer rail pair. A bearing element (32) is connected to the knife support and is positioned axially and radially in the inner guiding rail. Preferred Features: The bearing element is formed as bolts (32) or pins and is fixed to the knife support, preferably by screwing.

Description

The invention relates to a device for cutting sheet-like Good, especially in the form of stacks, with a support frame, a positively driven and simultaneous lateral movement Knives movable up and down, two in different Angled linear guides for one knife receiving knife carrier and drive means for moving the knife carrier.

A device of the type mentioned is basically out known from DE 42 06 338 A1. There the knife holder is linear driven cutting device associated with linear guides on which one or more linear roller units connected to the machine frame roll. These linear roller units are pivotable in the Support frame stored. The swivel bearing is therefore outside the linear guide with the consequence of a rather large lever arm, of the introduction of high bending moments in the support frame when Conditional on cut. In order to accommodate these, the swivel bearing is and dimension the linear guide accordingly, which is associated with a high construction and cost, also a considerable one additional mass must be moved during the cut. apart the respective linear roller unit is of the type of a guide carriage trained, which encloses the linear guide, thus outside the linear guide is arranged so that the knife in the Supported forces necessarily lead to the fact that the Linear roller unit is expanded. The consequence is a little precise Guiding the knife and thus a cut inaccuracy.

A device of the type mentioned is also from DE 44 40 754 C1 known. There the linear guides are on the support frame side arranged guide rails formed, on which form-fitting Carriages run, which are articulated via pins with the knife carrier are connected. An axial needle bearing surrounds the respective pin. Between the knife carrier and that on the threaded section a further axial bearing is provided for the nut screwed on. The knife carrier is thus stored in the journal and not, as with the first-mentioned prior art, in the supporting frame; nevertheless due to the design of the linear guides with the outside the linear guides arranged and the distance the bearing point of the cutter bar from the linear guide too this device has the same disadvantages as the State of the art mentioned at the beginning.

DE 196 29 285 C1 discloses a device of the type mentioned Kind known, in which a roller bearing also in a carriage Linear guide a pin for the pivotable mounting of the Knife holder is provided. There is the pivot axis of the pin arranged at a distance from the guide axis of the linear guide and it fastening elements are provided parallel to the pivot axis, which connected the knife carrier to the carriage. These fasteners enforce recesses in the knife with radial play. This device also has the disadvantages mentioned above on.

It is an object of the present invention to provide a rigid mounting of a Knife holder in the support frame, especially by an optimal storage position of the knife holder as well as minimal Bending moments that when cutting over the knife bearing in the Support frame are introduced.

A first solution to the problem according to the invention provides for a device of the type mentioned above that the respective linear guide an outer pair of guide rails, which with the support frame is connected, and an inner, in the outer pair of rails positively guided Has guide rail, wherein, the respective linear guide assigned a bearing element is connected to the knife carrier, the is mounted axially and radially in the inner guide rail.

It is essential in this solution that the bearing element is pivotable in the inner guide rail is mounted. This allows the resulting Force application point of the bearing element as tight as desired the cutting plane. Preferably the resulting one Force application point of the bearing element selected so that it at least approximately coincides with the cutting plane. It arises so that when cutting, a clearly directed, but in amount small bending moment that from the respective bearing element into the inner Guide rail is initiated. Storage is preferably carried out of the bearing element in the inner guide rail and the storage the inner guide rail in the outer pair of guide rails essentially in one plane. The cutting forces are thus without noteworthy bending moments, from the knife / knife holder to the respective one Bearing element in the inner guide rail and from there into the outer pair of guide rails. Because of the invention Design and arrangement of the aforementioned components can not Expansion of the storage area and therefore no undefined Game of parts moving relative to each other.

According to a second inventive solution to the above object is provided in a device of the type mentioned in the introduction, that the respective linear guide has an outer pair of guide rails, which is connected to the support frame, as well as an inner, in the outer Rail pair has positively guided guide rail, wherein, the respective Assigned linear guide, with the knife carrier a bearing element is connected, which is mounted within the linear guide.

In contrast to that known from the prior art, outside the linear guide arranged storage of the bearing element, allows the respective bearing element arranged within the linear guide, that the knife introduced into the support frame Cutting forces in one plane from the respective bearing element through the Linear guide can be introduced into the support frame. The at the devices according to the prior art, with relative large lever arm attacking cutting forces are thus at storage according to the invention eliminated. The bearing element is immediate stored in the component that is part of the linear guide forms.

The respective bearing element used to support the knife carrier is preferably designed as a bolt or pin. A special Embodiment of the invention provides in this context that the bearing element is firmly connected to the knife carrier. The firm Connection can be achieved, for example, in that the bearing element, specifically the bolt, screwed to the knife holder is.

The axial and radial bearings of the bearing element in the inner The guide rail is expediently made by means of two divided Axial / radial bearings that are inserted into the inner guide rail and are clamped when screwing the bolt into the cutter bar become.

According to a specific embodiment of the invention, that the arranged in the long, outer pair of guide rails shorter inner guide rail has a relatively large length, at least half the length of the outer pair of guide rails equivalent. The inner guide rail therefore does not function of a carriage, but requires tilt-free guidance.

It is considered particularly advantageous if the respective guide rail of the outer pair of guide rails essentially one M-shaped cross section and that of the respective outer guide rail facing section of the inner guide rail one in has a substantial V-shaped cross section. By working together of the respective M-shaped cross section with the respective V-shaped Cross section is a precise guide of the inner guide rail in the outer pair of guide rails both in the plane of the Section line or a plane running parallel to this plane as well as perpendicular to this plane.

It is particularly contemplated that the inner guide rail in the outer pair of guide rails is roller-supported. The storage of the inner guide rail in the outer pair of guide rails can for example by means of a cage guided between them respectively. When the M-shaped and V-shaped work together Guide cross-sections, the cage is preferably V-shaped in cross section educated. It can be designed as an angle flat cage, which holds a large number of rolling elements.

Specifically, the storage of the inner guide rail according to the invention in the outer pair of guide rails according to the present Invention by using a flat cage guide HYDRL / EGIS M and V guide rails with integrated rack for Positive guidance of an angular needle roller flat cage with a pinion according to the catalog of HYDRL AG / INA LINERTZ technology OHG, part number 005-276-373 / FRF-D-D-049915, pages 62 to 64 his.

To align the knife carrier precisely to the bearing or the support frame to be able to, at least in the area of one of the two knife carrier bearings an eccentric for adjusting the bearing element relatively be provided for the knife holder.

The knife holder can be operated in different ways be one-sided or two-sided. With two-sided Attacking a power tool on the knife carrier can, since no high Forces to be passed through the knife holder, the knife holder and the linear guides assigned to it have smaller dimensions become. The respective power means is, for example around a hydraulic cylinder or an electromotive Drive using a crank drive.

Further features of the invention are in the dependent claims and the Description of the figures and the figures themselves shown, wherein it is noted that all individual features and all combinations of Individual features are essential to the invention.

Figur 1

eine Stirnansicht der erfindungsgemäßen Schneidmaschine mit den strichliert angedeuteten, erfindungsrelevanten Bauteilen,

Figur 2

eine Seitenansicht der in Figur 1 gezeigten Schneidmaschine mit strichliert angedeuteten, für den Schnitt relevanten Bauteilen,

Figur 3

eine vergrößerte Darstellung des in Figur 1 gezeigten, für die Erfindung relevanten Bereiches der Schneidmaschine, von vorn gesehen,

Figur 4

einen Schnitt durch die Schneidmaschine gemäß der Linie B-B in Figur 3,

Figur 5

einen Schnitt durch die Schneidmaschine gemäß der Linie A-A in Figur 3,

Figur 6

eine vergrößerte Darstellung der in Figur 5 gezeigten Verbindung von Messerträger und Bestandteil des Traggestells bildendem Ständer der Schneidmaschine,

Figur 7

eine gegenüber der Ausführungsform nach Figur 6 geringfügig modifizierte Gestaltung unter Verwendung eines Exzenters.

In the figures, the invention is shown on the basis of a preferred embodiment of a face cutting machine, without being limited to this. It shows:

Figure 1

3 shows an end view of the cutting machine according to the invention with the components relevant to the invention indicated by dashed lines,

Figure 2

2 shows a side view of the cutting machine shown in FIG. 1 with components which are indicated by dashed lines and are relevant for the cut,

Figure 3

2 shows an enlarged view of the area of the cutting machine relevant to the invention shown in FIG. 1, viewed from the front

Figure 4

4 shows a section through the cutting machine along line BB in FIG. 3,

Figure 5

3 shows a section through the cutting machine along the line AA in FIG. 3,

Figure 6

5 shows an enlarged illustration of the connection between the knife carrier and the stand of the cutting machine forming part of the supporting frame, shown in FIG. 5,

Figure 7

a slightly modified design compared to the embodiment of Figure 6 using an eccentric.

The cutting machine according to the invention is shown in FIGS. 1 and 2 shown schematically. It has a stand 1, a back table 2 for receiving the material to be cut and a front table 3 to pick up the cut material. With the one to be cut For example, it is a large format Stack made up of a large number of sheets of paper one on top of the other is. The rear table 2 is in the rear area by means of Supports 4 supports. In stand 1 there are 2 and 3 above tables a press beam 5 for fixing the material to be cut before Cut, and in front of the press bar 5 a knife 6 to cut of the material to be cut. The storage of the knife 6 takes place in the Stand 1 indirectly, that is, it is the knife 6 with a knife holder 7 screwed, which is movably mounted in the stand 1. The vertical to the support surface 8 of the tables 2 and 3 Section plane is illustrated by means of the dash-dotted line 9. The knife carrier 7 is essentially U-shaped, with essentially vertically oriented legs 10 and one to be connected, essentially horizontally oriented web 11. As can be seen from the illustration in FIG. 1, the knife holder 7 with its legs 10 or a web 11 in its raised Position slightly inclined from the vertical or horizontal arranged, thus also the knife 6 with its cutting edge 12 slightly inclined to the horizontal, since the knife 6 in Vibration cut until it hits a table surface 8 recessed horizontally arranged cutting bar 38 is lowered, the cutting edge 12 in this position parallel to the table surface 8 is positioned. To achieve this swing cut, is the knife carrier 7 in differently inclined linear guides towards the two illustrated double arrows and movable here, the knife carrier 7 additionally, relative to this linear guides 13 is pivotable about axes 14. actuated is the knife 6 or the knife carrier 7 by means of a extended end of a leg 10 of the knife carrier 7 attacking Hydraulic cylinder 15, the cylinder sleeve 16 pivotable below in the stand 1 and its piston rod 17 pivoted on the above Leg 10 of the knife holder 7 attacks. The swivel axes are each designated by the reference numerals 18 and 19. The direction of force of the hydraulic cylinder 15 is substantially in the longitudinal direction whose point of engagement on the knife carrier 7 is assigned to the linear guide 13 oriented.

There is an opening 20 in the stand 1 below the raised knife 6 provided for pushing through the material to be cut. Above the knife holder 7 is the front of the stand 1 with a control panel 21 Mistake.

The structure according to the invention and the mode of operation of the stator 1 mounted knife holder is in Figures 3 to 6, however for the knife carrier in the lower end position or the one in the Knives located in the lower end position clarify:

Since the bearing of the knife carrier 7 in the two linear guides 13 is identical and the positions of the linear guides 13 with respect of the stand 1 only in terms of their inclination to the vertical to make the swing cut is shown below only the storage of the, on the orientation of the drawings related, shown on the left end of the knife carrier 7 in the stand 1st described in more detail. The same applies accordingly to storage the right end of the knife holder 7 in the stand 1.

According to the inclination of the pulling swing cut of the knife 6 is the linear guide 13, based on its longitudinal axis 22, below a defined angle to the horizontal, which is preferably 40 to 60 °, in particular 50 °.

The linear guide 13 has an outer pair of guide rails 25, by the parallel guide rails 23 and 24, and an inner pair 25 in the outer rail positively guided guide rail 26. The length of this guide rail 26, as can be seen from the illustration in FIG. 3, slightly longer than half the length of the outer pair of rails 25. The guide rails 23 and 24 of the outer pair of rails 25 are designed as so-called M-guide rails, that is, they have a substantially M-shaped cross section. The hereby formed V-shaped bearing surfaces of these guide rails 23 and 24 are designated by reference numeral 27. By means of various Screws 28 are the guide rails 23 and 24 with the stand 1 connected. The inner guide rail 26 has the outer one on it Guide rails 23 and 24 facing sides arranged in a V-shape Bearing surfaces 29, the angle formed between them with the angle of the bearing surfaces 27 of the M guide rails 23 and 24 matches. The guide rail 26 is in this respect a double-V guide rail educated. The inner guide rail 26 is in Distance to the outer pair of guide rails 25, the each between the inner guide rail 26 and the outer guide rail 23 and 24 formed space for receiving a V-shaped arranged, positively guided needle roller flat cage 30 is used. The Forced guidance of the respective needle roller flat cage 30 relative to inner guide rail 26 and associated outer guide rail 23 and 24 can be accomplished in different ways are and is therefore not illustrated in the figures. Forced operation takes place, for example, in accordance with the aforementioned HYDRL / EGIS M and V guide rails with integrated rack and flat cage with pinion. The length of the needle roller flat cage 30 is dimensioned so that when moving the inner guide rail 26th from the lower end position illustrated in Figure 3 in the in this figure also illustrated with dash-dotted lines reproduced upper end position a precise play-free guidance the inner guide rail 26 in the outer pair of rails 25 guaranteed is.

As can be seen in particular from the illustration in FIG the outer pair of rails 25 and the inner guide rail 26 and in particular their V-shaped bearing surfaces 27 and 29 are symmetrical, these components being assembled with respect to the stand 1 are that the axis of symmetry is essentially with the section plane 9 coincides. The resulting force application point 31 of the bearing for the knife carrier 7 in the inner guide rail 26 essentially coincides with the sectional plane 9. Is stored the knife carrier 7 in the respective linear guide 13 by means of a Threaded bolt 32, the two in a bore of the guide rail 26th used radial-axial bearing 33 penetrates. The two camps are formed as a needle bearing, the front ring shoulders 34 between the inner guide rail 26 and one on the knife carrier 7 adjacent washer 35 or the inner guide rail 26 and a head portion 36 of the threaded bolt 32 are fixed. screwed the threaded bolt 32 is thus from the rear area of the stator 1 in a threaded bore 37 of the knife carrier 7. In order to be able to screw in the threaded bolt 32, the stand 1 for example with a hole for inserting a screwing tool Mistake.

Figure 7 shows a slightly compared to the embodiment of Figure 6 modified design of the storage of the respective threaded bolt 32 in knife holder 7. To adjust the position of the knife 6 or the knife carrier 7 relative to the stand 1 to the position the cutting edge of the knife 6 at bottom dead center Adjusting the cutting bar 38 is at least one of the two Threaded bolt 32 is not screwed directly into the knife carrier 7, but in an eccentric mount 39 which is eccentric to the Central longitudinal axis 40 of the threaded bolt 32 in one shoulder having, with respect to the axis 41 rotationally symmetrical recess is mounted in the knife carrier 7. This eccentric mount 39 is pivotable relative to the knife carrier 7 and in the adjusted position the eccentric receptacle 39 and the knife carrier 7 in the area of dashed lines connectable by means not shown.

Claims (12)

Device for cutting sheet-like material, in particular in the form of stacks, with a support frame, a positively guided knife that can be moved up and down with simultaneous lateral movement, two linear guides arranged obliquely at different angles for a knife holder receiving the knife and drive means for moving the knife holder , characterized in that the respective linear guide (13) has an outer pair of guide rails (25) which is connected to the support frame (1) and an inner guide rail (26) which is positively guided in the outer pair of rails (25), the respective linear guide (13) associated with the knife carrier (7) is connected to a bearing element (32) which is mounted axially and radially in the inner guide rail (26). Device for cutting sheet-like material, in particular in the form of stacks, with a support frame, a positively guided knife that can be moved up and down with simultaneous lateral movement, two linear guides arranged obliquely at different angles for a knife holder receiving the knife and drive means for moving the knife holder , characterized in that the respective linear guide (13) has an outer pair of guide rails (25) which is connected to the support frame (1) and an inner guide rail (26) which is positively guided in the outer pair of rails (25), the respective linear guide (13) associated with the knife carrier (7) is connected to a bearing element (32) which is mounted within the linear guide (13). Apparatus according to claim 1 or 2, characterized in that the bearing element is designed as a bolt (32) or pin. Device according to one of claims 1 to 3, characterized in that the bearing element (32) is fixedly connected to the knife carrier (7), in particular the bolt (32) is screwed to the knife carrier (7). Device according to one of claims 1 to 4, characterized in that the mounting of the bearing element (32) in the inner guide rail (26) and the mounting of the inner guide rail (26) in the outer pair of guide rails (25) essentially in one plane (9) , in particular in the area of the sectional plane (9). Device according to one of claims 1 to 5, characterized in that the resulting force application point (31) of the bearing element (32) coincides at least approximately with the cutting plane (9). Device according to one of claims 1 to 6, characterized in that the respective guide rail (23 or 24) of the outer pair of guide rails (25) has a substantially M-shaped cross-section and that section of the outer guide rail (23 or 24) facing the respective inner guide rail (26) has a substantially V-shaped cross section. Device according to one of claims 1 to 7, characterized in that the inner guide rail (26) is roller-mounted in the outer pair of guide rails (25). Device according to Claim 8, characterized in that the inner guide rail (26) is mounted in the outer pair of guide rails (25) by means of a cage (30) which is positively guided between them. Device according to claim 9, characterized in that the cage (30) is V-shaped in cross section. Apparatus according to claim 9 or 10, characterized in that the cage (30) is designed as an angular flat cage which receives a plurality of rolling elements. Device according to one of claims 1 to 11, characterized in that an eccentric (39) is provided for adjusting the bearing element (32) relative to the knife carrier (7).

Images