DE1082227B - Cutting machine for paper, cardboard or the like. - Google Patents

Description

The invention relates to a cutting machine for paper, cardboard or the like with a crank drive for = the knife carrier, which is guided with one end in an adjustable setting and by means of two two angle levers attacking tie rods pulled down in changeable positions to the material to be cut is, the two angle levers via a connecting rod on the directly only one angle lever acting crank drive are connected. ίο

In such cutting machines, they are for the material to be cut changeable positions of the knife carrier and thus also of the knife depending on whether the tie rods and the angle levers have the same or different lengths or form the same or different angles or whether the link guide is perpendicular to the cutting table or is inclined. This changing the cutting movement of the knife is known in cutting machines by pivoting the link guide, both with parallel cutting machines, i.e. with the knife parallel to the Cutting table in every movement section, as well as with swing cutting machines with constantly changing Inclined position of the knife until it sits parallel on the cutting table, but it can be done for everyone Cutting machine can only be set to two types of cutting. In parallel cutting machines, for example, a parallel bevel cut is made when the link guide is inclined and if the backdrop is vertical, a parallel vertical cut. With swing cutting machines a swinging bevel cut and a swinging perpendicular cut is made by the same adjustment of the link guide achieved. Swing cut means that one side of the knife moves unevenly in relation to the other side of the knife. In the case of the swing cutting machine with swiveling link guide, which has become known associated pull rod or the lever arms of the double-armed lever acting on this pull rod compared to the pulling rod acting on the other end of the knife holder or the lever arms of the corresponding associated double-armed lever of different lengths and form different angles. Intended to now simply by adjusting the link guide from the inclined position to the vertical position Swing cut position of the knife holder balanced and this converted to an exact vertical cut but with the known gear arrangement this is only possible, if not all Link lengths and angles are the same in pairs on both sides of the cutting machine. However, are all gear links and angles on both sides of the cutting machine are the same size, then you can due to the rule of a four-bar linkage, there are no unequal movements. So it has to be at least Cutting machine for paper, cardboard or the like.

Applicant:

VEB paper processing machine plant

Perfecta, Bautzen, Schäfferstr. 44

Dipl.-Ing. Günter Nerge ,, Dresden,

Heinz Dittrich, Radebeul, and Oskar Besser, Dresden,

have been named as inventors

a gear member or an angle must not be the same in pairs in order to cause an oscillating movement of the knife to obtain. Exact equality of the movement of the two end points of the knife, which is the case with the vertical cut is required is with an asymmetrical arrangement of links and a quadrangle with unequal joints The crank arms of the swing arm, as the well-known cutting machine type shows, not to reach. Thus, by adjusting the link guide set to swing cut, a exact vertical section cannot be achieved, which can easily be demonstrated kinematically. By adjusting the backdrop, only an approximate vertical cut is achieved, which is, however, used when cutting, such as deck cutting, perforating, etc., of stacks of paper is not applicable.

With the parallel vertical cut, the knife takes from the beginning to the end of its downward movement a permanently parallel position to the cutting table. This causes the knife to penetrate its entire length once into the material to be cut. Here the knife moves vertically, i. H. in all points towards the cutting table at a right angle. The parallel bevel cut is different from the Parallel vertical cut in that the knife is not perpendicular, but at an angle deviating from 90 ° Angle - which corresponds to the position of the link guide - moved diagonally towards the cutting table. The parallel position of the knife in relation to the cutting table is maintained in every movement segment. This type of cutting is also known as "diagonal cut". With swing perpendicular cut the knife constantly changes its inclination in relation to the cutting table and only reaches in the lowest dead center position, d. H. so if that

009 '527/5

Claims (1)

3 4 Knife has cut through the stack of paper, the par- Fig. 2 the cutting machine according to Fig. 1 with oblique all position to the cutting table. The guide link for the set link guide of the knife holder for the knife is at a right angle to the parallel bevel cut, Cutting table set. Fig. 3 the cutting machine according to Fig. 1 with lowering In the case of the swinging bevel cut, like 5, the right set link guide for swinging swivel with swing cut the knife continuously cut right, its inclined position in relation to the cutting table and fig. 4 the cutting machine according to fig. 1 with oblique The par-set link guide of the knife holder is only sufficient in the lowest dead center position all position to the cutting table. Here is the guide swing bevel cut, setting for the knife but below a 90 ° ab- io Fig. 5 the cutting machine according to Fig. 1 with a set deviating angle. knife lowered on the cutting table. All four types of cutting are used in operation. The figures show one according to the invention. The type of cutting used depends on the cutting machine trained, in the machine condition of the material to be cut stand 1, a shaft 2 is mounted. This shaft 2 is and especially after the cutting work to be carried out. 15 is driven via a gear train, not shown, in the case of angled cut, the vertical forces are ben. A rotating crank 3 is firmly connected to the shaft 2 when cutting paper, cardboard and cardboard. The coupling rod 4 is lowest on the crank 3. The forces articulated in swinging perpendicular cut, which grow at their free end via the articulation and parallel bevel cut accordingly at point 5 is connected to an angle lever 6, which and are greatest in parallel perpendicular cut. 20 with the vertex 7 on the machine stand 1 swivel-With hard material to be cut, such as Fournier, pressboard, is stored in bar. Due to the rotating movement of the plywood, vulcanized fiber and the like, however, the vertical crank 3 is set in an oscillating movement via the coupling rod 4 of the angular force to the individual types of cutting in the lever 6. An inverted ratio, so that the parallel vertical section, which is articulated to the coupling rod 4, requires the least amount of force. The decisive lever arm of the angle lever 6 is an adjusting fork 6a designed as a loop for the cutting force and the accuracy of the cut, into which the tie rod 9 of the knife carrier, which is associated with the various items to be cut and its structure, engages, the sharpness of the knife and its respective structure The engaging end 8 of the pull rod 9 is at the cutting angle to the cutting table. For intersecting material that is poorly too at the deepest point of the upwardly directed intersecting material, such as tissue paper, thru-fork 6 α and is clamped in this position for parallel wrapping paper, printing paper, parchment paper, blotting, vertical and parallel bevel cuts, paper, etc., the swing bevel cut is used - On the other lever arm of the angle lever 6 is a det. The swing perpendicular cut behaves at the connecting rod 15 with one end 16 most favorably with rubber, wooden board, chromo cardboard, the other end 16 a with a lever, etc., while the parallel bevel cut with synthetic 35 arm of a second angle lever 17 articulated verbunstoff, hard paper , Cellulose glass and the like. that is. The approximately vertical pull rod 9 is with her There is now the need to invent the upper end 10 hinged to the knife holder 11, tion in it, the cutting machine with the features The angle lever 17 is rotatable at the apex on the machine of the generic term explained at the beginning zubilden that with little construction effort the 40 of the other lever arm with the second tie rod Adjust for parallel perpendicular cut, parallel 20 articulated, which in turn with the upper oblique cut, swinging vertical cut and swinging end 21 is articulated on the knife holder 11. The measuring angled cut is possible. serhalter 11 is held by a bolt in the free end According to the invention, this object is achieved by 10 of the pull rod in a sliding block 12 of a link solved that the tie rods in a known manner 45 13 "out. The link guide of the knife holder 13 are designed to be of the same length and which can be swiveled directly from the machine stand in a known manner. Crank drive influenced arm of the bell crank one bar mounted on a bolt 14. She will after the Has adjusting fork, in which the assigned setting for parallel vertical and oscillating swivel Drawbar guided in and lockable and with right cut in the vertical position I (Fig. 1) which has a coupling rod 50 linked to the crank or for parallel bevel cutting and swinging bevel is articulated in such a way that by appropriate cut in the inclined position II (Fig. 2) Adjustment of the backdrop and the articulation point of the train held a locking device, not shown, rod in the adjustment fork of the driven angle- In position II, the end 8 of the pull rod 9 is in hebeis a parallel vertical section or parallel the adjusting fork 6 a of the angle lever 6 upwards oblique cut or swing perpendicular cut or 55 shifted so that an angle-changing position Swing bevel cut is achievable. ment of the tie rod 9 is conditional. This setting This measure makes it possible to use one of the tie rods 9 for the swinging perpendicular single cutting machine to perform the four mentioned cutting cuts and, with an inclined link guide 13, the types, whereas previously for these four swinging bevel cuts of the knife 23, two cutting machines are necessary to achieve types of cutting Of the four types of cuts, however, it is necessary that they are with beings. In particular, the task of the tie rods 9 connected to the knife carrier 11 and without any special construction effort is achieved, so that 20 are of the same length,
an economical production of the cutting machine is also guaranteed. Claim: The drawing shows an embodiment of the 65th Subject of the invention each in front view cutting machine for paper, cardboard or the like. With shown schematically. It shows a crank drive for the knife carrier that comes with Fig. 1 a cutting machine with one end vertically inserted in an adjustable setting set link guide of the knife holder for par-ist and by means of two angled levers all-round vertical cut with upright knife, 70 gripping tie rods in changeable positions gene is pulled down to the material to be cut, wherein the two angle levers are connected via a connecting rod to the crank drive acting directly on only one angle lever, characterized in that the tie rods (9 and 20) are of the same length in a known manner and the one directly from the crank drive (2, 3) influenced arm of the angle lever (6) has an adjusting fork (6 a) in which the associated pull rod (9) is guided in and lockable and with which a coupling rod (4) hinged to the crank (3) is articulated is such that by appropriate adjustment of the link guide (13) and the end (8) of the tie rod (9) in the adjusting fork (6 a) of the driven angle lever (6) a parallel vertical cut or parallel bevel cut or swinging perpendicular cut or swinging bevel cut can be achieved . Considered publications:
German patent specification No. 940401. For this purpose 2 sheets of drawings © 009 5OT5 9.