EP0056874B1 - Apparatus for cutting paper and the like - Google Patents

Apparatus for cutting paper and the like Download PDF

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Publication number
EP0056874B1
EP0056874B1 EP19810110792 EP81110792A EP0056874B1 EP 0056874 B1 EP0056874 B1 EP 0056874B1 EP 19810110792 EP19810110792 EP 19810110792 EP 81110792 A EP81110792 A EP 81110792A EP 0056874 B1 EP0056874 B1 EP 0056874B1
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EP
European Patent Office
Prior art keywords
cut
support
paper
gap
edge
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.)
Expired
Application number
EP19810110792
Other languages
German (de)
French (fr)
Other versions
EP0056874A2 (en
EP0056874B2 (en
EP0056874A3 (en
Inventor
Rolf Mohr
Wolfgang Mohr
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.)
CESSIONE;MOHR, ROLF
Original Assignee
Rolf Mohr
Wolfgang Mohr
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Filing date
Publication date
Family has litigation
Priority to DE3101911 priority Critical
Priority to DE3101911A priority patent/DE3101911C2/de
Application filed by Rolf Mohr, Wolfgang Mohr filed Critical Rolf Mohr
Publication of EP0056874A2 publication Critical patent/EP0056874A2/en
Publication of EP0056874A3 publication Critical patent/EP0056874A3/en
Publication of EP0056874B1 publication Critical patent/EP0056874B1/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6123084&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0056874(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18Means for removing cut-out material or waste
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01Means for holding or positioning work
    • B26D7/02Means for holding or positioning work with clamping means
    • B26D7/025Means for holding or positioning work with clamping means acting upon planar surfaces
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/202With product handling means
    • Y10T83/2092Means to move, guide, or permit free fall or flight of product
    • Y10T83/2198Tiltable or withdrawable support

Description

  • The invention relates to a device for cutting paper, cardboard or the like. In which the material to be cut is advanced on a table by a feed unit by a desired amount, and an intermediate cut is provided in the edge cuts, as well as following one or more main cutting processes are.
  • In devices for cutting sheets of paper, cardboard or the like present in stacks, in particular in the case of collecting sheets, the feed of the stack under the knife must be very precise in order to ensure that the stack is cut by the knife at the desired dividing lines. Even slight displacements, for example dimensional deviations due to paper distortion, can result in the knife no longer being cut at the desired dividing line, but instead being displaced from it. Especially in the case of collecting sheets, this would result in the individual patterns being cut. To prevent this, the collective sheets are printed in such a way that the individual patterns do not come to lie directly against one another, but remain between these distances. Although it is now necessary to provide intermediate cuts between the main cutting processes, cutting into the pattern is no longer possible due to this procedure. Similarly, before cutting stacks, their edges are trimmed. The advantage of this procedure can be seen in the fact that after the edge cuts have been made, the stack to be cut is present in a defined shape or dimension, which has a decisive influence on the accuracy of the subsequent main cutting processes.
  • For cost reasons, the width of the paper strips resulting from paper waste is kept as small as possible when inserting edge cuts and intermediate cuts. In practice, paper strips are produced when inserting edge or intermediate cuts, the width of which is approximately 1.5 to 2 mm. While the paper strips created by the edge cuts can be removed by machine, the paper strips created by the intermediate cuts must be removed by hand. This usually happens after the complete separation of the collecting sheet into the individual partial sheets with the paper waste located between the partial sheets. The partial sheets have to be moved apart, the paper waste has to be removed and then the partial sheets have to be put together again. On the one hand, this is very cumbersome, on the other hand, it cannot be prevented that the partial sheets move against one another when they are moved apart and reassembled, which complicates the subsequent workflow.
  • From FR-A-1 150136 a device for cutting paper, cardboard or the like is known, in which the material to be cut is shifted by a desired amount on a table by a feed unit, and in the edge cuts, and subsequently an intermediate cut is provided for one or more cutting operations. The table consists of a front part that receives the cut material and a rear part for receiving the material to be cut. So that the paper waste from the edge cuts no longer has to be removed manually, the device in the feed direction of the material to be cut has a flap designed as a paper support behind the cutting knife, which can be lowered downwards, creating a gap in the table through which the Paper waste can be conveyed down from the cutting area. In order to prevent paper waste from getting onto the front part of the table during the edge cut, a lock arranged in the front part of the table on the side facing the gap is additionally folded up, as a result of which paper waste thrown against the lock bounces off the lock during the cutting process and be promoted through the gap.
  • From DE-B-1 195 577 a device for separating rolling stock is known, in which the rolling stock is moved along a roller table consisting of several sections. A gap is formed between two sections of the roller table to remove the top ends of the rolling stock, and the separation process then takes place. The severed, heavy top ends fall through the gap, after the top ends have been removed, the sections are moved towards each other again, thus closing the gap.
  • The object of the invention is to provide a device of the type mentioned, in which, in addition to the main cutting processes, edge and intermediate cuts can also be carried out, but in which manual work can be omitted following these cuts or cutting processes.
  • The object is achieved by a device of the type mentioned at the outset, which according to the invention has the following features:
    • The table consists of a front table, which holds the cut goods, and a rear table, which holds the goods to be cut,
  • The front table and rear table can be pushed apart to form a gap between them,
    • a ruler is arranged with the gap closed under the front table in the area of the dividing surface of the front and rear table,
    • When the gap is opened, the ruler can be moved from the rest position with the gap closed into a working position in which it runs along the entire length of the separating surface at the rear edge of the front table and is perpendicular to its paper support.
  • By dividing the table according to the invention into a front table and a rear table and the arrangement of a ruler, which is in its rest position below the front table and which can be moved into a working position in which it rests on the rear edge of the front table over the entire length of the separating surface and perpendicular to its paper support, it is ensured that both the paper waste resulting from the edge cuts and the intermediate cuts can be removed directly through the gap formed between the front and rear table without manual interference. The arrangement of the ruler in its working position prevents brittle material from being thrown by the cutting knife onto the front table, regardless of whether it is an edge or intermediate cut. Furthermore, the ruler enables the rear edge of a stack of cut material that was cut last to be pushed completely onto the front table when it is moved into the working position, and thus no material to be cut is pinched when the gap is subsequently closed. In the case of the ruler in the working position, the worker can also straighten the cut material stack, which is shifted due to the design of the knife, again with the aid of a utility angle, this straightening process also being able to be carried out automatically.
  • The object of the invention is further achieved by a device of the type mentioned at the outset, which according to the invention has the following features:
  • The table consists of a front table, which is designed as a base frame with a support for receiving the cut goods, and a rear table for receiving the goods to be cut,
    • the support of the base frame and the rear table can be pushed apart to form a gap between them,
    • the end of the surface of the support of the front table facing the rear table can be raised and / or lowered relative to the surface of the rear table.
  • The possibility of being able to raise the end of the surface of the support of the front table facing the rear table relative to the surface of the rear table serves to detach the last cut part stack or parts from the cutting bar, on which, depending on the material, the condition of the material to be cut, the knife setting with respect to the cutting bar at the bottom dead center of the cutting cycle and the sharpness of the knife edge with the bottom bends. By loosening these lowermost sheets it is ensured that the stack as a whole is moved when the stack is moved following the main cutting process.
  • According to a special embodiment of the invention, it is proposed that control means are provided which control the device in such a way that the front table or support and rear table are pushed apart in time before the edge or intermediate cut. It is furthermore advantageous if the thickness of the gap which results when the front table or support and back table are pushed apart is a multiple of the width of the paper strips resulting from the edge or intermediate cut. This ensures that the paper strips can fall down unhindered through the gap.
  • According to a further embodiment of the invention, the front table or the support can be displaced from the rear table perpendicular to the cutting plane. The shift can be accomplished mechanically, hydraulically or pneumatically. Control means are expediently provided which control the device in such a way that the displacement of the front table or the support is adapted to the sequence of the cutting program. In the ideal case, the device works fully automatically, so that the operating personnel do not have to carry out any additional operations and thus largely perform monitoring functions.
  • To collect the paper waste, a container with a baffle located between the container and the gap for collecting the paper waste is arranged in the area of the separating surface from the front table or support to the rear table. The guide plate should have a foldable part arranged in the region of the front edge of the rear table for aligning the material to be cut lying on the rear table. Alignment of the material to be cut is expedient because the material can be pulled more or less away from the front surface of the feed unit determining the format by the preceding pressing and cutting process - in particular in the area of the press beam - according to its material properties. Without aligning the material to be cut, the lower arches of the material to be cut would lie against the front surface of the feed unit during the movement of the feed unit, but the upper arches would be spaced from the front surface. This would result in the creation of non-dimensional labels the next time the cut was made. The arrangement of a foldable part in the region of the front edge of the rear table ensures that the material to be cut is pressed against the feed unit over its entire front surface during the folding process. It is advantageous if the folding process is tapped several times in quick succession in order to loosen up and align the individual layers of material, particularly in the case of material with a rough surface. The alignment process should take place after the front table or the support and the rear table have been pushed apart and the ruler has moved into the working position and the paper strips obtained during edge trimming or intermediate cutting have been conveyed into the gap by a forward movement of the feed unit. The control of the alignment process should also take place automatically in accordance with the control of the cutting processes.
  • 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 shown in several embodiments, for example, without being limited to these embodiments.
  • It shows:
    • FIG. 1 shows a schematic illustration of a first device according to the invention, with the front table shifted, during the edge cut,
    • Figure 2 is a detailed view of the cutting zone in a cut acc. Fig. 1,
    • Figure 3 is a schematic representation of the device acc. 1, with a displaced front table after completion of a main cut,
    • FIG. 4 shows a schematic representation of a device according to the invention with a removable plate located on the front table,
    • FIG. 5 shows a schematic illustration of a second embodiment with a front table consisting of a base frame and support,
    • FIG. 6 shows a schematic illustration of a preferred embodiment with a divided, foldable baffle,
    • Figure 7 is a schematic representation of the second embodiment with a raised or lowerable support (shown in the lowered position) of the front table and
    • Figure 8 is a schematic representation acc. Fig''7 in the raised position of the support of the front table.
  • As can be seen from FIG. 1, the device according to the invention consists of a displaceable front table 1 and a non-displaceable rear table 2. The rear table 2 receives a paper stack 3 to be cut. A press bar 5, which is only partially shown in the area of the knife 4, presses the paper stack 3 to be cut lying on the rear table 2 to achieve an optimal cutting process against the surface 6 of the rear table 2. The knife holder 7 comes into contact with the press bar 5 grips the knife 4 and thus ensures exact guidance during the cut. A paper stripping device 8 is arranged in the area of the front of the knife, which stripes the paper strips stuck to the knife as a result of the static charge. The stripping device 8 is expediently designed as a felt or broom which, due to the relative movement of the knife 4 returning after the cutting process to the stripping device 8, strips the paper strips which may be hanging on the knife 4. A ruler 9 is arranged under the front table 1 in the area of the separating surface between the front table 1 and the rear table 2, this ruler 9 opening the gap 10 from the rest position shown in dashed lines according to FIG. 1 with the gap closed and into a working position shown in solid lines in FIG. 1 is movable, in which it rests over the entire length of the separating surface between the two tables 1, 2 on the rear edge 11 of the front table 1 and is perpendicular to its paper support surface 12. The ruler 9 is pivoted by mechanical aids, not shown, due to the movement of the front table 1 to open the gap 10. A guide plate 14 is arranged on the front edge 13 of the rear table 2 over the entire length of the separating surface between the two tables 1 and 2. Via this guide plate 14, paper waste falling through the gap 10 can fall directly into a waste container 15 during the edge or intermediate cut to be described. This container 15 is expediently arranged for collecting the paper waste in the area of the separating surface from the front table 1 to the rear table 2. As can be seen from FIG. 1, the container 15 has a suction device 16. However, this suction device can also by a transport device, for. B. a conveyor belt or a screw conveyor can be replaced. It is also conceivable that the corresponding devices can be controlled via a clock which only switches on when the gap 10 between the front table 1 and the rear table 2 is open. The advantage of this control is to be seen in the fact that people working on the device are not unnecessarily disturbed by the noise generated, for example, by suction or by drafts.
  • The workflow on which the cutting device is based will now be described with reference to FIGS. 1 to 8:
  • Before a paper stack 3 to be cut, for example in the form of collecting sheets, is cut, it is necessary to trim the edges of the paper stack 3. This is shown for example in Fig. 1. The paper stack 3, which is received by the rear table 2, is shifted by a feed device, not shown, by the amount of the edge strip 17 to be cut on the rear table 2. The front table 1 is moved at the same time, the gap 10 is open in this position, and the ruler 9 is also in the solid position shown in FIGS. 1 and 2. Before the edge cut is carried out, the pressure beam 5 is pressed down onto the paper stack 3 to be cut, then the knife 4 separates the edge strip 17 from the paper stack 3 when the edge strip 17 is pressed, the cutting edge 18 of the knife 4 touches the cutting bar 19 arranged in the rear table 2 during the cutting process, the vertical ruler 9 prevents the cut material from becoming brittle during cutting by the knife on the paper support surface 12 of the front derdisch is thrown. For example, the cut off edge strip 17 can only fall through the gap 10 via the guide plate 14 into the waste container 15. Should paper strips 17 stick to the knife 4, these are, as already described, removed from the knife 4 by the paper stripping device 8.
  • As specifically from the detailed view of the cutting zone acc. 2, the cutting bar 19 is not located directly on the front edge 13 of the rear table 2, but is arranged parallel to the front edge 13, which is necessary due to the forces occurring during cutting. The result of this is that the edge strip 17 formed during cutting can get caught on the front edge 13 of the rear table 2 and thus does not get into the waste container 15. 2, therefore, after the edge strip 17 has been separated off, an intermediate feed of the paper stack 3 to be cut is inserted. This takes place as follows: after the edge strip 17 has been separated in accordance with FIG. Fig. 1, the knife 14 and the press beam 5 is transferred to the rest position, not shown. The cutting plane of the knife 4 corresponds to the dash-dotted line in accordance with. Fig. 2. Thus, the paper stack 3 to be cut is in a position in which its cutting plane coincides with the dash-dotted line. In order now to ensure that the edge strip 17 which arises after the cutting — if it has not already fallen into the waste container 15 by the wedge action of the knife pointing forward — falls into the waste container 15, an intermediate advance of the paper stack to be cut 3 carried out. At the end of this intermediate feed, the paper stack 3 to be cut assumes the position shown in FIG. 2, in which it would have pushed an edge strip 17 possibly remaining in the area of the cutting zone over the front edge 13 of the rear table 3.
  • Analogously to what has been described here, the other edges of the paper stack 3 to be cut are trimmed. The stack 3 must be rotated into the corresponding position by the operating personnel. This is facilitated by an air cushion located between the paper stack 3 and the front table 1, which is generated by air nozzles (not shown) located in the front table 1, which can also be arranged in the rear table 2.
  • 2, the front table 1 and the ruler 9 are shown in dashed lines with the gap 10 closed.
  • The further cutting course with the corresponding intermediate cuts can best be seen from FIG. 3. After the edge cut according to 2 and the intermediate feed shown there, the front table 1 is moved in the direction of the rear table 2. It swivels the ruler 9 from the vertically illustrated working position into its rest position below the front table 1 until finally the rear edge 11 of the front table 1 abuts the rear table 2. The gap 10 previously formed between the front table 1 and the rear table 2 is thus closed. Then the feed device moves the paper stack 3 to be cut up to the width to be cut in the direction of the front table 1. A customary cutting process then takes place, as described in the explanations for FIG. 1 when the edge strip 17 is cut off, a first cut paper stack 20 being produced. The bottom sheet of the paper stack 20 is due to the described arrangement of the cutting plane not only on the front table 1, but slightly covers the surface 6 of the back table 2. Due to the wedge-shaped shape of the knife, the individual sheets of the cut paper stack 20 are after the end of Separation process in such a way that the paper stack 20 has a parallelogram-shaped cross section as seen in the cutting plane.
  • After the cutting process, the front table 1 is moved from the rear table 2. The shift can be accomplished mechanically, hydraulically or pneumatically. During the displacement process, the ruler 9 is transferred from the rest position to the working position. As already described, the ruler 9 assumes a position in the working position in which it rests on the rear edge 11 of the front table 1 and is perpendicular to the paper support surface 12. When the ruler 9 is moved into the working position, the ruler 9 completely pushes the cut stack 20 above the front table 1 onto the front table 1. It is therefore not possible for the cut stack 20 to close in the further workflow to be described Gap 10 is pinched.
  • If an intermediate cut is to be made following the described process for separating the paper stack 20, the ruler 9 remains in the vertical position. There it also serves as a contact surface for correcting the stack 20 in the form of a parallelogram. For example, by bringing the utility angle 21 towards the stack 20, it is possible to align it with the ruler located in the vertical position.
  • If, following the main cutting process to separate the stack 20, an intermediate cut is made, the paper stack 3 to be cut is advanced by the amount of the paper strip to be cut off during the intermediate cut. This is followed by the workflow already described when separating the edge strip 17. This means in particular the pressing down of the press beam 5, the actual cutting process by lowering the knife 4, the strip 17 which arises during the intermediate cut falls into the container 15 via the deflecting plate 14. Any paper strips 17 which get stuck are removed from the paper stripping device 8 when the Knife 4 removed from this, the ruler in turn prevents when cutting brittle material to be cut that the cut paper strips 17 are thrown onto the front table 1. Following the intermediate cut there is the intermediate feed already described, with which it is to be ensured that paper strips 17 which may still be in the region of the cutting zone are reliably fed to the container 15. Finally, again closing the gap 10 with the return of the ruler 9 to its rest position, the further advancement of the paper stack 3 to be cut with subsequent cutting process in which a further paper stack 20 is separated from the stack 3 to be cut. It finally arises after several main cutting processes with inserted intermediate cuts acc. 3 shows a plurality of cut paper stacks 20 located one behind the other, each of which can be aligned on the ruler 9 after a main cutting process or, as shown in FIG. 3, after a number of main cutting processes using the utility angle 21.
  • If no intermediate cuts are to be made during the main cutting processes, it is of course superfluous to move the front table 1 from the rear table 2. In this case, all cutting operations are performed in the sequence cutting, feeding, cutting, etc.
  • Fig. 4 shows a slightly modified embodiment of a front table. There the front table 1 is provided with a removable plate 22. The plate 22 is connected to the front table 1 via fastening elements, not shown, during the operation of the device. The plate 22 is detachable from the front table 1, the cut paper stacks 20 located on the plate 22 can be easily. Way to be transported together with the plate 22 for further processing. This has the advantage that the operator does not have to individually transport the cut paper stacks for further processing, especially because the material to be cut is usually very unwieldy and very heavy.
  • 5 shows a second embodiment of the invention. In this, the table consists of a front table 1, which is designed as a base frame 30 with a support 31 for receiving the cut goods 20, and a rear table 2 for receiving the goods to be cut 3, analogous to the method of operation according to. 1 to 4 following the edge cuts or the intermediate cut, the support 31 of the base frame 30 can be displaced perpendicularly to the cutting plane on the latter, and thus the paper strips 17 occurring during the edge cut or intermediate cut through the between the rear table 2 and the support 31 resulting gap 10 can fall. As shown in FIGS. 7 and 8, the end of the surface (36) of the support (31) of the front table (1) facing the rear table (2) can be raised and / or lowered relative to the surface (6) of the rear table (2). The type of adjustment is not shown. Analogously to the first embodiment, this can be accomplished mechanically as well as hydraulically or pneumatically. 4, it is also analogously possible to lift the support 31 from the base frame 30.
  • Both the support 31 and the plate 22, generally the front table 1 and the rear table 2, can be equipped with air nozzles which generate an air cushion between the base and the paper stack lying thereon. Finally, to avoid the risk of crushing for the person working on the device, it is provided that a non-contact protective device on the device, for example in the form of a light barrier, is also used so that when the operator intervenes in the danger zone and thus interrupts the beam path, the movement the front table 1 or the pad 31 for closing the gap 10 is prevented or stopped.
  • Figure 6 shows a schematic representation of a preferred embodiment with a split, foldable baffle. The guide plate 14 is designed such that a part 32 of it by means of a pneumatically, hydraulically or magnetically actuated plunger 37 about an axis of rotation 33 of the bearing 39 arranged on the front edge 13 of the rear table 2 upwards against the surface 34 of the material to be cut, which faces the front table 1 3 can be folded. This takes place after the front table 1 and the rear table 2 have been pushed apart, the ruler 9 has been moved into the working position and the paper strips resulting from the edge trimming or the intermediate cuts have been conveyed into the gap 10 by a forward movement of the feed unit 38. The flipped-up part 32 of the guide plate 14 presses in the drawn position against the remaining stack of the goods to be cut 3 lying on the back table 2. This ensures that the goods 3 to be cut, due to the previous pressing and cutting process according to its material properties more or less had been pulled away from the front surface 40 of the feed unit 38 determining the format, without any manual intervention, exactly against it. In FIG. 6, the foldable part 32 is shown in dashed lines in its folded-down position. Not shown, since it is not essential to the invention, is the drive of the plunger 37. The part 32 is folded back into its position shown in broken lines with the aid of a pneumatically, hydraulically or magnetically actuated plunger 49 arranged in the rear table 2 or by a spring element. The circuitry of the plungers 37 and 49 should, if appropriate, be such that, by actuating the plunger in cycles, the folding operation of the part 32 takes place knocking around the individual layers of material, especially with material with a rough surface, to loosen and align.
  • FIGS. 7 and 8 show a schematic illustration of the second embodiment with the front table being able to be raised or lowered. The side of the support 31 of the front table 1 facing the rear table 2 is raised or lowered. For this purpose, a pivot lever 35 mounted in an axis of rotation 41 is arranged below the side of the front table 1 facing the rear table 2. Depending on the position of the pivot lever 35, the front table 1 and thus the support 31 are more or less raised or lowered.
  • The support 31 is lowered in FIG. The lowering takes place by means of an eccentric lever 43 which acts on the pivot lever 35 via an intermediate link 42. Depending on the position of the eccentric lever 43, the support 31 on its side facing the rear table 2 can be lowered by an infinitely adjustable amount below the surface 6 of the rear table 2. This makes it possible to place a sheet 44 of cardboard, cardboard or the like on the surface 36 of the support 31 and to push the cut paper stacks 20 produced during processing from the feed device and through the ruler 9 onto the sheet 44. If a corresponding number of cut paper stacks 20 have been collected on the sheet 44, they can easily be removed from the cutting machine in this form and sent for further processing. The lowering of the edge of the support 31 facing the rear table 2 offers the possibility of using sheets 44 of any thickness without the material 3 to be cut pushed forward by the feed device after a cut abutting against the edge 45 of the sheet 44 facing the rear table 2 and without that a step forms which could cause the cut sheets of cut paper stack 20 to shift after a cut. A spring element 46 acts on the intermediate linkage 42 and presses the intermediate linkage 42 against the eccentric of the eccentric lever 43. It is conceivable to also act on the eccentric for displacing the intermediate linkage 42 by means that act pneumatically, hydraulically or magnetically.
  • In Figure 8, the pad 31 is shown in the raised position. In contrast to the illustration in FIG. 7, the support 31 is not lifted by the intermediate linkage 42, but by a pneumatically, hydraulically or electromagnetically actuatable tappet 47 mounted in the front table 1. The tappet 47 is in the extended position shown in FIG System with the pivot lever 35, which is pivoted by an angle defined by the preset stroke of the ram 47 and thus raises the support 31 relative to the surface 6 of the rear table by a certain amount. The lifting of the support 31 serves the purpose of releasing the last cut paper stack (s) 20 from the cutting bar 19, on which it depends on the material properties of the material to be cut, the knife setting in relation to the cutting bar 19 at the bottom dead center of the cutting cycle and the sharpness of the Knife edge with the lowest leaves can stick. When the pivot lever 35 is not acted upon by the plunger 47, a compression spring 48 arranged in the front table 1 ensures that the pivot lever 35 is pivoted back against the intermediate linkage 42 and thus assumes a defined position with respect to the surface 6 of the rear table 2. In this position, the surface 6 of the rear table 2 and the surface 36 of the support 31 or the surface of the sheet 44 are in one plane. In Figure 7, the plunger 47 is shown in the retracted position.

Claims (16)

1. Apparatus for the cutting of paper, cardboard or the like, wherein the stock (3) to be cut is advanced to a desired extent on a table (1, 2) by a feed unit (38), with execution of edge cuts and also an intermediate cut after one or more main cutting operations, characterised by the following features :
the table comprises a front table (1) which accommodates the cut stock (20), also a rear table (2) which accommodates the stock (3) to be cut,
front table (1) and rear table (2) are movable apart from one another to form a gap (10) between said tables,
a straightedge (9) is arranged under the front table (1) in the region of the separating plane between front table (1) and rear table (2) when the gap (10) is closed,
when the gap (10) is opened the straightedge (9) is adapted to travel from the position of rest obtaining when the gap (10) is closed into a working position wherein it abuts on the rear edge (11) of the front table (1) over the entire length of the separating surface, and is situated at right angles to the paper support (12) of the latter table.
2. Apparatus for the cutting of paper, cardboard or the like, wherein the stock (3) to be cut is advanced to a desired extent on a table (1, 2) by a feed unit (38), and edge cuts are made and also an intermediate cut following one or more main cutting operations, characterised by the following features :
the table' comprises a front table (1) constructed as a base frame (30) with a support (31) for accommodating the cut stock (20), also a rear table (2) for accommodating the stock (3) to be cut,
the support (31) of the base frame (30) and the rear table (2) are adapted to move apart from one another for forming a gap (10) between said tables,
that end of the surface (36) of the support (31) of the front table (1) which is directed towards the rear table (2) is liftable and/or lowerable relatively to the surface (6) of the rear table (2).
3. Apparatus according to claim 1, characterised in that the front table (1) is provided with a removable plate (22).
4. Apparatus according to claim 2, characterised in that end of the surface (36) of the support (31) of the front table (1) which is directed towards the rear table (2) is liftable and/or lowerable by means of a rocking lever (35) which is arranged below the front table (1) and which is operable mechanically and/or hydraulically and/or pneumatically.
5. Apparatus according to claim 2 or 4, characterised in that the support (31) is removable from the base frame (30).
6. Apparatus according to claim 2, 4 or 5, characterised in that when the gap (10) is closed a straightedge (9) is arranged below the front table (1) in the region of the dividing plane between support (31) and rear table (2), and when the gap (10) is opened the straightedge (9) is adapted to move from the position of rest obtaining when the gap (10) is closed into a working position wherein it abuts on the rear edge (11) of the support (31) over the whole length of the dividing plane and is situated at right angles to the support surface for paper (36) of said support.
7. Apparatus according to one or more of claims 1 to 6, characterised in that control means are provided which so control the apparatus that the moving-apart of the front table (1) or support (31) from the rear table (2) is effected at a time before the edge or intermediate cuts.
8. Apparatus according to one or more of claims 1 to 7, characterised in that the width of the gap (10) resulting when the front table (1) or support (31) on the one hand and the rear (2) on the other hand move apart amounts to a multiple of the width of the paper strips (17) produced when the edge and intermediate cuts are made.
9. Apparatus according to one or more of claims 1 to 8, characterised in that the front table (1) or support (31) is displaceable at right angles to the cutting plane away from the rear table (2).
10. Apparatus according to one or more of the claims 1 to 9, characterised in that the front table (1) or the support (31) is displaceable mechanically, pneumatically or hydraulically.
11. Apparatus according to one or more of claims 1 to 10, characterised in that control means are provided which so control the apparatus that the displacement of the front table (1) or of the support (31) is adapted to the course of the cutting programme.
12. Apparatus according to one or more of claims 1 to 11, characterised in that a container (15) with a guide plate (14) situated between container (15) and gap (10) is arranged, for collecting paper scraps, under the table in the region of the dividing plane between front table (1) or support (31) and rear table (2).
13. Apparatus according to claim 12, characterised in that the guide plate (14) has a hingedly movable portion (32) arranged in the region of the front edge (13) of the rear table (2), for aligning the stock (3) to be cut which is lying on the rear table (2).
14. Apparatus according to claim 13, characterised in that the portion (32) can be swung about a pivot (33), situated parallel to the front edge (13) of the rear table (2), upwardly against that surface (34) of the stock (3) to be cut which is directed towards the front table (1) or the support (31
15. Apparatus according to one or more of claims 12 to 14, characterised in that the container (15) is connected to a suction extraction device (16) or a transporting device for removing the waste paper.
16. Apparatus according to one or more of claims 1 to 15, characterised in that the knife (4) for cutting the stock (3) has a paper strip-off device (8) at the front side of the knife.
EP19810110792 1981-01-22 1981-12-28 Apparatus for cutting paper and the like Expired - Lifetime EP0056874B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3101911 1981-01-22
DE3101911A DE3101911C2 (en) 1981-01-22 1981-01-22

Publications (4)

Publication Number Publication Date
EP0056874A2 EP0056874A2 (en) 1982-08-04
EP0056874A3 EP0056874A3 (en) 1983-06-15
EP0056874B1 true EP0056874B1 (en) 1985-10-09
EP0056874B2 EP0056874B2 (en) 1992-12-09

Family

ID=6123084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810110792 Expired - Lifetime EP0056874B2 (en) 1981-01-22 1981-12-28 Apparatus for cutting paper and the like

Country Status (5)

Country Link
US (1) US4445409A (en)
EP (1) EP0056874B2 (en)
JP (1) JPS6247674B2 (en)
DE (2) DE3101911C2 (en)
ES (1) ES8301139A1 (en)

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DE19621872C1 (en) * 1996-05-31 1997-08-21 Mohr Adolf Maschf Device for cutting flaky material

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DE4002102C2 (en) * 1990-01-25 1991-11-14 Wolfgang 6238 Hofheim De Mohr
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DE19621872C1 (en) * 1996-05-31 1997-08-21 Mohr Adolf Maschf Device for cutting flaky material

Also Published As

Publication number Publication date
EP0056874A3 (en) 1983-06-15
JPS6247674B2 (en) 1987-10-08
EP0056874B2 (en) 1992-12-09
ES508960D0 (en)
ES8301139A1 (en) 1982-12-16
ES508960A0 (en) 1982-12-16
DE3172644D1 (en) 1985-11-14
US4445409A (en) 1984-05-01
DE3101911A1 (en) 1982-09-02
DE3101911C2 (en) 1990-02-22
JPS57189797A (en) 1982-11-22
EP0056874A2 (en) 1982-08-04

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