EP1160061B1 - Back gauge for machines for cutting stacked sheet material - Google Patents

Abstract

The machine has a table (1) to hold the sheets (9) to be cut and a feed bracket, to move the sheets towards the cutting plane of a cutting knife (5). The feed bracket is held on its lower side on slides (18), which support the sheets to be cut in the area of the end face (19) of the feed bracket and bridge the space between the feed bracket and the table. The feed bracket is preferably rake-shaped, with the rake tines (16) in one plane, perpendicular to the table surface (2) and parallel to the cutting plane.

Description

The invention relates to a cutting machine for cutting stacked, sheet-like material, with a table for receiving the material to be cut and a feed saddle for Moving the material to be cut in the direction of the cutting plane of the knife of the machine, wherein the feed saddle on its underside facing the table picks up sliders in the area the front surface of the feed saddle, which is used to place the material to be cut, the distance between bridge the feed saddle and the table.

Cutting machines for cutting stacked, sheet-like goods, with a table for Inclusion of the material to be cut and a feed saddle for moving the Cuttings in the direction of the cutting plane of the knife of the machine are from the state of the art Technology well known, for example from EP-A-0 056 074. It concerns all Rule around so-called face cutting machines, in which a cutting knife in one plane is moved perpendicular to the table surface receiving the material to be cut. This movement takes place especially in the manner of a swing cut. At the bottom dead center, the knife penetrates into one Cutting bar made of plastic, which is embedded in the table. The top surface of the Cutting bar forms, as far as this is technically feasible, a plane with the surface of the Table. The continuous penetration of the cutting knife into the cutting bar results in in this edges and bumps, so that the cutting bar is run over with the Feed saddle is excluded. The material to be cut is usually on one Back table and the cut goods on a front table of the cutting machine.

The surface of the table of such cutting machines is quite large, so that the Metal processing of the surface of the table during its manufacture Table surface cannot be excluded. The movable feed saddle is lying on the table; however, due to the unevenness of the table surface, it is not ensured that the feed saddle lies on the table over its entire length, so that the lower Sheet layers of a stack of material to be cut are fed precisely from the feed saddle can be. The result is faulty cuts, with which the cut stack turns out to be Represents scrap product. The disadvantage mentioned is particularly serious if of that Feed saddle not a stack of cut goods, but a large number next to each other directly on Feeder saddle must be pushed against the partial stack, the contact surface of which Feed saddle, especially their contact line on the feed saddle in the area of the table surface is very low or very short.

Known feed saddles that lie on the table as a unit damage the cutting bar, if you run over them. With such feed saddles, it is therefore not possible to cut material to advance completely beyond the cutting plane by means of the feed saddle. at special sheet-like material, for example coated papers, find special Feed saddle use, especially so-called tilt saddle. These are an additional one tiltable parallel to the cutting plane and parallel to the table surface and serve avoiding and compensating for top and bottom cuts. So an overcut leads to that the upper sheet layer is pulled away from the feed saddle during the cut and it becomes to this compensate, the feed saddle in the upper area towards the rear, thus from the Cutting plane inclined away. - However, the possibility of tilting the feed saddle leads to that in its normal position and in its position compensating for the top cut in Contact area with the material to be cut is lifted from the table surface and only in its fully tilted down position to compensate for the undercut on the table rests. Thus, only in the latter case is it ensured that the lower sheet layer of the stack or partial stack can be advanced exactly by means of the feed saddle.

A cutting machine of the type mentioned is known from CH 265 523 A. With this one the respective slider at a large distance from the end face of the cutting material contacting Feed saddle pivoted in this. The respective slider is rod-shaped and form the end face assigned to the end face of the feed saddle and the end face the feed saddle essentially one level with each other. The respective glider is over an axis is pivotally mounted, which is arranged parallel to the end face of the feed saddle.

It is an object of the present invention a cutting machine of the type mentioned continue to form that regardless of any unevenness in the table surface of the Cutting machine an exact system of the lower sheet layers of the stack or the partial stack is guaranteed on the feed saddle and the cutting bar of the cutting machine from the feed saddle can be run over.

The task is solved in a cutting machine of the type mentioned at the outset in that the respective slider in the area of the face of the feed saddle contacting the material to be cut in this is used and has a slider contacting the table, which by a Axis arranged parallel to the table surface and perpendicular to the front surface of the feed saddle is pivotable.

According to the invention it is thus provided that the feed saddle is still on the Can rest on the table surface. In this case, the compliant gliders are completely in the Feed saddle retracted and the material to be cut is fed by means of the Feed saddle and / or the glider. If the feed saddle moves over an unevenness in the table, the represents a depression, the gliders located in this area extend and bridge the distance between the feed saddle and the table surface. The compliant Bridging the distance between the feed saddle and the table therefore also represents when designing a feed saddle as a tilt saddle, make sure that regardless of the position of the tilt saddle, one that may exist between the tilt saddle and the table Distance is bridged. The sliders are extended, for example, under their Dead weight or due to a preload, if necessary using springs. - According to the invention it is further provided that the respective slider only the space in front area of the feed saddle. He directs the person contacting the table Slider section on which is parallel to the table surface and perpendicular to the end face of the Feed saddle arranged pivotally resilient. The force when pushing of the material to be cut acts on the slider, is thus in the direction of the pivot axis of the table contacting slider section directed. In particular, this training that the slider is made of plastic, in particular is designed as an injection molded part. The axis to which the slider section is pivotable is preferably formed by a film hinge. Due to the above-described storage of the respective slider section, the compliant forms Slider section with its end face coming into contact with the stack of material to be cut, regardless of the respective position of the slider section, a plane with the end face of the Feed saddle or the end face of the other slider sections. The easy way this level can be represented, in which, in the case of built-in gliders, the Machined the front surface of the glider and feed saddle, especially when grinding.

As a rule, the feed saddle becomes rake-like on its side facing the material to be cut be designed so that it is as far in as possible when the material to be cut is pressed by means of a press beam The direction of the cutting plane of the cutting machine can be moved by the tines of the rake in Enter recesses of the press beam. With such a design of the feed saddle the tines pick up the gliders, which are thus extended or retracted into the tines. The the End faces of the tines of the rake contacting the material to be cut are in one plane and in the essentially perpendicular to the table surface receiving the material to be cut and essentially oriented parallel to the cutting plane of the knife.

When designing the feed saddle in the manner of a rake, it is particularly provided that each Tine picks up a glider.

The inventive design of the feed saddle with the resilient sliders allows the To run over the cutting bar of the cutting machine. Should the cutting bar slightly over the Standing out of the plane of the table, the movement of the feed saddle leads over the cutting bar to the fact that the sliders are retracted slightly because the feed saddle or the tines of the Feed saddle are designed so that they in the front area of the feed saddle, the Cuttings contacted, cannot lie on the table. In this respect, the feed saddle constructively provided with a height return.

In the figures, two embodiments of a cutting machine are illustrated, the Feed saddle with sliders to bridge the distance between the feed saddle and are provided on the table. The invention is essentially based on FIGS. 6 to 10 explained. Figures 1 to 5 illustrate an embodiment not according to the invention but included in the description, since Figures 1, 4 and 5 in particular the basic Make clear the structure of the cutting machine and the tilt saddle.

Figur 1

eine erste Ausführungsform der Schneidmaschine in einem Schnitt senkrecht zur Schneidebene des Messers im Bereich des Schneidmessers, Preßbalkens, Vorschubsattels und des angrenzenden Tischbereiches,

Figur 2

eine Ansicht X des in Figur 1 gezeigten Vorschubsattels,

Figur 3

ein gegenüber der Ausführungsform nach der Figur 1 modifizierte Gestaltung des Vorschubsattels in Art eines Neigesattels, in seiner nicht geneigten Ausgangsstellung,

Figur 4

den in Figur 3 gezeigten Neigesattel in einer nach oben geneigten Stellung,

Figur 5

den in Figur 3 gezeigten Neigesattel in einer nach unten geneigten Stellung,

Figur 6

einen Schnitt senkrecht zur Schneidebene des Messers durch einen modifiziert gestalteten Vorschubsattel,

Figur 7

eine Ansicht Y des in Figur 6 gezeigten Vorschubsattels,

Figur 8

einen Schnitt senkrecht zur Schneidebene durch das bei dieser Ausführungsform Verwendung findende Rechenteil,

Figur 9

eine Ansicht Z gemäß Figur 8 der bei dieser Ausführungsform Verwendung findenden Gleiter (Stirnansicht) und

Figur 10

eine Seitenansicht eines Gleiters.

It shows:

Figure 1

a first embodiment of the cutting machine in a section perpendicular to the cutting plane of the knife in the area of the cutting knife, press beam, feed saddle and the adjacent table area,

Figure 2

1 shows a view X of the feed saddle shown in FIG. 1,

Figure 3

1 modified design of the feed saddle in the manner of a tilt saddle, in its non-inclined starting position,

Figure 4

the tilting saddle shown in Figure 3 in an upward inclined position,

Figure 5

the tilting saddle shown in Figure 3 in a downward inclined position,

Figure 6

a section perpendicular to the cutting plane of the knife through a modified feed saddle,

Figure 7

6 shows a view Y of the feed saddle shown in FIG. 6,

Figure 8

3 shows a section perpendicular to the cutting plane through the computing part used in this embodiment,

Figure 9

a view Z according to Figure 8 of the slider used in this embodiment (front view) and

Figure 10

a side view of a glider.

The cutting machine partially shown in Figure 1 has a table 1 with a horizontal Table surface 2. In a perpendicular to the sheet plane of the drawing, in the table 1 introduced groove 3 is a cutting strip 4 made of plastic. Above the cutting bar 4 a wedge-shaped cutting knife 5 is positioned and fastened to a knife carrier 6 Knife carrier can be lowered and raised by means of a drive, for example a crank drive, wherein the knife 5 is moved in the swing cut and slightly at the bottom dead center in the Cutting bar 4 penetrates. In FIG. 1, the top dead center of knife 5 and knife bar 6 shown. The cutting plane running perpendicular to the plane of the drawing sheet is shown in FIG. 1 illustrated with the dashed line 7. The, based on the orientation of the drawing sheet the area of the table 1 located to the left of the line serves to accommodate the part to be cut Good, the area on the right that holds the cut good.

FIG. 1 illustrates one by means of a feed saddle 8 up to the cutting plane 7 advanced stack of cut material 9, which consists of a plurality of sheets lying one on top of the other Paper is formed. This can be a single stack 9, for example over a substantial range of the width of the feed saddle 8, based on its end face 19, extends. However, a large number of partial stacks can also be positioned next to one another.

In the rear area of the feed saddle 8 engages in one provided in this Recess a bearing pin 10 inserted from below, with its lower Bolt section 11 a groove, not shown, running perpendicular to the cutting plane 7 in the table 1 interspersed and in a manner not shown below with a tabletop Carriage is connected to a spindle which is oriented in the groove direction. By driving the spindle The carriage is moved in one direction or the other in the corresponding direction and thus the bearing pin 10 and the feed saddle 8 positively connected to it moved accordingly. The direction of movement of the feed saddle 8 perpendicular to the cutting plane 7 is illustrated with a double arrow A.

The rake 8 consists, in the exemplary embodiment according to FIGS. 1 and 2, of one of the Bearing pin 10 receiving bearing flange 12 and one with this by means of a screw 13 screwed rake 14. This has a rear base section 15 and a plurality in parallel and tines 16 arranged at a relatively short distance from one another, which are perpendicular to the Extend table surface 2. The end faces 10 of the tines 16 are parallel to the cutting plane positioned so that when a stack of cut material is advanced, it is aligned cuboid. Finally, on the side of the cutting knife 5 facing away from the knife carrier 6 is a means a drive lowerable and raisable press bar 17 is provided, which on the material stack 9th is lowerable. The press beam 17 is also on its side facing away from the knife 5 rake-like, so that it is relatively advanced in the one shown in FIG The position of the feed saddle 8 of the press beams 17 can be lowered onto the stack 9 of cut material can.

Regardless of whether the feed saddle 8, specifically the computing section of the feed saddle 8, rests on the table 1 or not, is an exact advancement of the stack 9 in particular the lower sheets of the stack 9 by the positioning of Slid 18 ensured in the lower region of the rake 14. According to the number of tines 16 such sliders 18 are provided, which are designed as rods with a square cross section are. Their width and height correspond to the thickness of the respective tine 16, the tines 16 and the rods, as can be seen from the illustration in FIG. 2, essentially in alignment are arranged.

Figure 1 illustrates the storage of the respective slider 18 in the feed saddle 8. Der With regard to its longitudinal extent, slider 18 is essentially parallel to the table surface 2 and oriented perpendicular to the cutting plane and by means of a in the longitudinal direction of the slider 18th extending slot 20 mounted in an axis 21, which in turn in the lower portion of the Base section 15 of the rake 14 is mounted. In the base section 15 is also a Screwed screw 22, which contacts the rear surface 23 of the slider 18, this such that the slider 18 can be fed without play in its longitudinal direction, so that in each Angular position of the slider 18 is ensured that the end face 24 is a plane with the End face 19 of the associated tine 16 forms.

Regardless of the action of the adjusting screw 22 on the respective slider 18, this can in to some extent pivot freely so that it can move relative to the rake 14. The lower one Edge is therefore always on the table surface 2, regardless of whether one due to unevenness changed contour of the table surface 2 is present. The slider 18 can also be on the cutting bar 3rd slide away so that the feed saddle 8 further forward over the position shown in Figure 1 can be pushed so far that the end face 19 of the tines 16 over the cutting plane 7th is moved out.

In the sense of the present invention, it is of course not necessary that the Feed saddle 8 is formed in several parts; instead, the bearing flange 12 and Rake 14 also form part. This will be the case especially with smaller rakes.

Figures 3 to 5 illustrate the use of the gliders described for Figures 1 and 2 18 with a tilt saddle. In this case, a shoulder piece 26 is connected to the bearing flange 12, which receives several vertically oriented set screws 27. This can be done manually or motorized the feed saddle 8, in particular the rake 18, around which the bearing pin 10 penetrating axis 28 are tilted.

FIG. 3 illustrates the initial state of the calculation 14, that of the situation according to FIG. 1 corresponds, at an angle of 90 ° between the table surface 2 and the end faces 19 of the Prongs 16. Figure 4 shows the saddles tilted upwards at an angle of 88 °. In the 5, the saddle is inclined downward, at an angle of 91 °. In all In some cases, the front portion of the slider 18 bridges the distance between the lower edge of the assigned tine 16 and the table surface 2.

Figures 6 to 10 show the design of the relevant parts of the cutting machine in a modified embodiment of the glider. With the embodiments according to FIGS. 1 to 5 substantially identical parts are given the same reference numerals for simplicity designated. In contrast to the illustration in FIG. 1, the feed of the not takes place there shown stack of cut goods, based on the drawing plane, from right to left. To that extent In addition, the cutting plane 7 has been drawn in in the left area of the drawing sheet.

The illustration in FIG. 6 also shows that one with dash-dotted lines illustrate spindle 29, a movable carriage 30 is mounted, in which the bolt section 10th is used, which creates the positive connection to the feed saddle 8. By means of a additional, vertically arranged set screw 31 can rake 14 with respect to the table surface 2 can be adjusted slightly in height. For the sake of simplifying the drawing is in the figure 6 of the rake 14 is drawn without the sliders, in this respect reference is made to the illustration in FIGS 10 referenced.

Figures 7 and 8 show only the rake with the gliders used in them, the are designated by the reference number 32. The individual slider 32 is in FIGS. 9 and 10 illustrated.

As can be seen from the representation of these figures, the slider 32 is an injection molded part trained, it is made of plastic. The respective tine 16 has in its front, lower Area a recess 33 with an additional recess, into each of which a slider 32 is inserted, a U-shaped expansion projection 34 of the slider 32 in the recess Tines 16 interspersed. The lower contour 35 of the rake itself is spaced parallel to Placed table surface 2 The slider 32 has a contacting surface 2 Slider section 36, which is parallel to the table surface and perpendicular to the end face 19 of the Feed saddle arranged axis 37 is pivotable. Below is the slider section 36 with one Provide curvature so that it rests almost flat on the table 1. In the area of the end face 24, thus not only in the area of the slider section 36, but also directly in it closing area, the material to be fed contacts the respective slider 32.

Changes, for example in the area of the cutting bar 3 or an unevenness of the table or due to a changed setting of the feed saddle designed as a tilting saddle, the distance to the contour 35 of the tines, this means that the slider section 36 more or less on or swings. The slider section is always on the table.

Claims (7)

1. A cutting machine for cutting stacked, sheet-like material, comprising a table for receiving the material to be cut and a feed bracket for displacing the material to be cut towards the cutting plane of the cutter of the machine, wherein the feed bracket (8) accommodates sliders (32) on its underside facing the table (1), which sliders bridge the gap between the feed bracket (8) and the table (1) in the region of the end face (19) of the feed bracket (8) which serves to contact the material to be cut (9), characterised in that the respective slider (32) is inserted in the feed bracket (8) in the region of the end face (19) thereof which contacts the material to be cut (9), and comprises a slider section (36) which contacts the table (1) and which can swivel about an axis (37) which is parallel to the table surface (2) and is perpendicular to the end face (19) of the feed bracket (8).
2. A cutting machine according to claim 1, characterised in that the slider (32) consists of a plastics material, and in particular is produced as an injection moulded part.
3. A cutting machine according to claims 1 or 2, characterised in that the axis (37) is formed by a film hinge.
4. A cutting machine according to any one of claims 1 to 3, characterised in that on its side facing the material to be cut (9) the feed bracket (8) is formed in the manner of a rake, and the end faces (19) of the teeth (16) of the rake (14) which contact the material to be cut (9) are oriented in a plane and substantially perpendicularly to the table surface (2) which receives the material to be cut (9), and are also oriented substantially parallel to the cutting plane (7) of the cutter (5), wherein the teeth (16) receive the sliders (32).
5. A cutting machine according to claim 4, characterised in that each tooth (16) receives a slider (32) which is disposed between the tooth (16) and the table surface (2).
6. A cutting machine according to any one of claims 1 to 5, characterised in that the feed bracket (8) is formed as a tilting bracket.
7. A cutting machine according to any one of claims 1 to 6, characterised in that a cutting strip (3) is embedded in the table (1) of the cutting machine in the region of the cutting plane (7).

Images