EP1493540A2 - Paper cutter - Google Patents

Abstract

The slitter head (4) is moved along a cross-bar (3) with an asymmetric profile. An independent claim is also included for a locking device for fixing the cross-bar between two side walls (5) of the slitter, the cross-bar being insertible into a hole in the side wall which is provided with a cover.

Description

Paper cutters are known and familiar to the person skilled in the art in a wide variety of embodiments. There are on the one hand slitter and on the other hand beam cutters usual.
A slitter has an insert with a generally rectangular base. At two opposite edges, usually the shorter edges, side cheeks are arranged, wherein between the side cheeks a cross member is arranged, on which a slitter head is held longitudinally movable. The Traverse with the slitter head is in this case arranged on the slitter winder, that with the disc-shaped, rotatable knife in the slitter head along a longitudinal edge of the insert the material to be cut, such as paper, cardboard, plastic films or the like materials can be cut to the desired format. In a beam cutting device, a cutting bar is provided with a preferably arcuately curved blade, the cutting bar being rotatably supported at one end on a side cheek to cut the material to be cut by pivoting the cutting bar along a longitudinal edge of the cutting plate in the desired format.

In slitter cutters, it is known, the crossbar detachable to attach to the sidewalls to remove them from the Slitter to remove the slitter or the knife disc rotatably arranged therein to be able to change. Thus, on the one hand a replaced worn blade or a straight Knife disc against a profiled, wavy Knife disc to be replaced. To fix the crossbar on the side cheeks is the crossbeam z. B. from above in Recesses of the side cheeks can be used and with Screws or the like detachably in the recesses fixable.

For determining the material to be cut in the region of the longitudinal edge along the cutting area in which the cutting operation is known, a clamping device in the form of a Provide terminal block, the both ends in the prior art is clamped on the side cheeks and a bias such that they are in the central region, that is approximately in the middle of the longitudinal edge between the two side cheeks, bent down in the direction of the cutting plate is. By clamping the material to be cut with the Terminal strip is the cutting material before and during the Cutting process in the desired orientation on the Paper cutter held to exact cutting edges too receive.

To connect between insert and side cheeks it is known, on the insert or the side walls each mutually corresponding projections and To develop recesses / recesses in mutual engagement can be brought to the side cheeks in desired orientation to the insert at this zu holders.

Starting from this prior art is the expert asked to set a paper cutter improve, in particular with regard to the improvement of the Result of the production and the simplification of the Handling.

According to the invention, this object is achieved by the features of Protection claims 1 and / or 4, 8, 12, 15 and 18 solved. Advantageous embodiments of the invention are respectively Subject of dependent claims.

Due to the asymmetrical profile of the traverse is ensured that these always in the desired positional orientation arranged on the side cheeks of a slitter is. Here are the side cheeks with openings or Recesses provided whose cross section of the cross section the traverse corresponds. Thus, the traverse z. B. by breaching a breakthrough in a side bolster, being at the opposite crossbar in one corresponding recess in the form of a blind hole is inserted.

This embodiment offers the additional advantage that the Reel cutting head, with a corresponding Opening / breakthrough with the same cross-section as the Traverse is provided, also only in the correct position Orientation on the crossbar attachable and along the Traverse is displaceable. Thus it is guaranteed that the Reel cutting head not turned by 180 ° onto the crosshead can be plugged, so that the rotatable Cutting knife free upwards from the roller cutting head would stand out, causing a significant risk of injury to could represent a user.

Preferably, the traverse is made of metal and is here in particular of aluminum z. In one Extruded process produced and in the desired length cut to length.

In an advantageous embodiment of the invention, the Traverse two substantially perpendicular to each other straight sides, in particular essentially in the 90 ° angle to each other, with the third side the traverse a curved, arcuate, in particular has a convex outward course to one to obtain asymmetric cross-sectional profile. The Recesses and openings in the side cheeks as well in the reel cutting head are formed accordingly.

With the two perpendicular sides of the Traverse, one of which is essentially parallel to the plane Cutting plate and the other substantially perpendicular thereto is arranged, that is at the actual Cutting process resulting cutting forces in Reel cutting head to be picked up by the crosshead. In particular, the counterforce occurring during cutting on Cutting knife, which is essentially perpendicular to the top, from the cutting plate is pointing away through the parallel to the Cutting insert aligned side of the traverse was added. The corresponding counterforce in the direction parallel to Base of the insert is from the side of the crossbar taken perpendicular to this base is aligned.

To establish a traverse, preferably as above is described, it is proposed that at the Sidewall making a breakthrough according to the profile the traverse has, a cover is provided in the retracted state of the traverse, d. H. If you the other end in the blind hole of the other side cheek is completely plugged in, before the opening in this Sidewall is displaceable. This can be z. B. be done by that a cover in the form of a slider by a linear translational movement moved in front of the opening becomes.

In an advantageous development, the cover is in shape a disk rotatable about an axis, wherein in the disc an opening or edge-side recess in Shape of the truss profile or the corresponding Breakthrough is provided in the side cheek. To the Pushing the crossbar will open this / edge Recess by twisting the disc before the breakthrough shifted in the side wall, so that the traverse through the Opening in the disc and the breakthrough in the Sidewall is hindurchsteckbar. Is the truss complete? inserted, so is by a rotational movement of the disc Section of the disc in front of the opening in the side cheek brought so that the inserted traverse is no longer in Opposite direction to the insertion of the breakthrough in the side cheek is pulled out.

To the disc or a cover in desired Positions relative to the side wall to set this are on the cover and / or the side wall respectively mutually corresponding locking projections and Locking recesses formed to z. B. a rotatable disc in an open and a closed position set.

To a relative movement between the Traverse and the Furthermore, to suppress side cheeks, is on the side the cover facing the inserted crossbeam, formed a rising profile. This means that z. B. in the above-described rotatable disk at Turning the disc from one open to one closed position the disc is formed such that the thickness of the pane increases so as to cross the cross between trained in the opposite side cheek Pinch blind hole and the profiled disc.

To improve the cutting result of Cutters of any kind, ie z. B. slitters or beam cutters, it is suggested that the Area of the cutting plate, at the longitudinal edge of the actual cutting process takes place, with the help of at least one, preferably formed integrally with the cutting plate, Beading is reinforced in order to deflect the cutting plate after below, z. B. when a slitter head along the Long edge is guided, to avoid. It is under the Term surrounds a fold in the material of the insert, preferably metal, to understand. This convolution exists in that the cutting plate is angled 90 ° downwards is, and then turn 180 ° up again folded back up and another one Section again by 90 ° in the original main plane the cutting plate is folded or bent over. These Folding can be done with known metal bending machines in the Inserted insert; instead of a convolution can the bead z. B. also by punching or otherwise be prepared. With this bead, which is essentially an upwardly open groove or depression along and preferably parallel to the longitudinal edge at which the Cutting process is arranged, the stability is the Cutting edge significantly increased in this area, so that the bending of the cutting plate is avoided and that Cutting result is improved.

Another embodiment of the invention is that instead a bead several beads in sections in the Cutting plate are arranged side by side.

Preferably, such a bead is on cutting plates of Roll cutters or beam cutters trained.

To the cutting material to be cut, ie paper, cardboard, Plastic films or the like materials easier between a clamping device in the form of a per se known terminal block and the underlying Insert insert and in a suitable position Furthermore, it is proposed that the known terminal strip, which preferably consists of a transparent plastic, so on the Cutting device is arranged that either one end the terminal strip firmly on the cutting device, z. B. one Sidewall, clamped, so that the other is not clamped end can be bent upwards freely, around under the terminal strip to be cut paper sheets insert and align. Alternatively, a be clamped clamped on both sides clamped in such a way that in the middle area, i. H. So basically in the Middle between the two side panels, this terminal block slightly arched upward, so here is a small Gap between the terminal block and cutting plate is formed. In This gap is the material to be cut z. B. with a corner easily insertable and then in the desired arrangement positionable. Is such a terminal strip on a Slitter used, the terminal block is through sliding over it on a traverse displaced retained slitter head also in this middle Depressed area and sets the food to be cut. As well can such a terminal block on a beam cutter be used.

To the side cheeks in the desired orientation on the To attach cutting plate, it is known that in the Side cheeks and the cutting plate to each other corresponding recesses / locking projections are formed, which are engageable with each other to so the above components in the correct position to each other align. According to the invention, it is proposed that the side cheeks each further dome-like cantilevered Projections are formed, which correspond with a corresponding trained penetration on the cutting plate interact. Furthermore, it is envisaged that in the dome-shaped projection of the side cheek a screw with widened screw head or an associated Washer is insertable, said screw head or the washer with a web, which at the Cutting plate is designed in the form of a latching projection, interacts. This is done by the dome-like Projection of the side cheek from one side through the corresponding opening in the cutting insert pushed through and then a screw with widened Screw head or washer from the other side is screwed into the dome-shaped projection, wherein the web is arranged on the cutting plate such that by screwing in the screw head or the additional washer holds down the bar and so on Loosening the cutting plate is avoided by the side cheek.

Preferably, this web is in an area near one Longitudinal edge of the cutting plate arranged, these Longitudinal edge is angled in particular by 90 ° and this Footbridge either as even more prominent from this area Projection is formed or as a stop edge in this angled section.

The side cheeks are preferably provided with stop edges for aligning the material to be cut. At this stop edges further projections may be integrally formed, which pass through the insert at least partially, to guide the material to be cut even with slightly lifted from the cutting side cheeks.
In a particularly advantageous manner, a slitter is equipped with one or more of the features described above to improve its overall functionality and cutting performance and to facilitate handling.

Figur 1a :

Ein Rollenschneidgerät in perspektivischer Darstellung,

Figuren 1b, 1c :

das Rollenschneidgerät nach Figur 1a in einer Seitenansicht auf die linke Seite,

Figur 1d :

eine Traverse im Querschnitt,

Figur 2 :

eine Schneidplatte im Querschnitt,

Figur 3 :

ein Rollenschneidgerät in Vorderansicht sowie in Querschnitt von der linken Seite zur rechten Seite

Figur 4a :

eine perspektivische Sicht von der vorderen Mitte in Richtung linke Seitenwange mit Schneidplatte in gebrochener Darstellung,
und

Figur 4b :

das Rollenschneidgerät nach Figur 1 im Querschnitt von vorn nach hinten im Bereich der Schneidgutanlage der rechten Seitenwange.

Further details, features and advantages of the invention can be taken from the following description part in which exemplary embodiments of the invention are explained in more detail with reference to schematic drawings. Show it:

FIG. 1a

A slitter in perspective,

FIGS. 1b, 1c :

the slitter of Figure 1a in a side view on the left side,

FIG. 1d :

a traverse in cross section,

FIG. 2 :

an insert in cross-section,

FIG. 3 :

a slitter in front view and in cross-section from the left side to the right side

FIG. 4a

a perspective view from the front center in the direction of the left side cheek with cutting board in a broken view,
and

FIG. 4b :

the slitter according to Figure 1 in cross section from front to back in the area of the cutting material system of the right side cheek.

In the one shown in Figures 1a, 1b, 1c, 1d Embodiment of the invention is a Slitter 1 with side cheeks 5, the side of a Cutting plate 2, preferably made of metal, are arranged. The side cheeks 5 are made of plastic, for example or also metal. At a longitudinal edge 2a of the Cutting plate 2 is a terminal block 11 for Holding down / fixing the goods to be cut such as Paper, cardboard, plastic film or the like arranged. in a side wall 5, an opening 6 is formed here is covered with a rotatable about an axis 9 disc 7.

The disc 7 has a breakthrough 8 or edge-side recess, in their cross section or their Shaping the cross section of the shown in Figure 1d Traverse 3 corresponds as well as the cross section of the Breakthrough 6.

By turning the disc 7, as in Figures 1b, 1c pictured, the disc 7 can be closed Position as in Figure 1c in an open position as in Figure 1b are rotated.

From the illustration in Figure 1a shows that the Traverse 3 arranged between the two side walls 5 is, wherein it at the rear side cheek 5 in FIG a blind hole engages and the opening 6 in the front Side cheek 5 is covered by the disc 7, wherein the Breakthrough 8 in the disc 7 in front of a section of Sidewall 5 is displaced.

FIG. 1d shows a preferred asymmetric one Shaping the Traverse 3 with two essentially straight sides 3a, 3b, which are substantially at 90 ° angle stand on each other, and a third page 3c, the arched convexly outwards. Thus it is achieved that the reel cutting head 4 always in the correct position with respect to Slitter 1 is aligned.

From the cross-sectional view in Figure 2, the results inventive shaping of the cutting plate 2 with a Beading 10, pointing down here, opposite the Terminal block 11 in the edge region of the cutting plate 2, near the Longitudinal edge 2a is formed. For a cutting plate 2 off Metal can do this by per se known flanging / folding done a metal plate.

From the schematic representation in Figure 3 is a Slitter 1 can be seen. Here are at one Cutting plate 2 on both sides side walls 5 with a interposed Traverse 3 is provided. At the Traverse 3 is a known per se slitting head. 4 movable along the cutting plate 2. The terminal block 11 is here both ends, preferably on the side walls 5, so held in a leadership held or clamped that in the Middle, so in the middle between the side walls 5, one Elevation "a" given to the surface of the cutting plate 2 is. In this middle area, the cutting material introduced and aligned in the correct position. When moving the reel cutting head 4 along the traverse 3 will then also this middle region of the terminal block 11th depressed and the material to be cut in the desired position aligned.

The side cheeks 5 are here designed such that they Sections 5a have, as lateral stop edges for Guiding the cutting material serve. Furthermore, to the Section 5a sections projections 5b formed, the cutting plate 2 in the lateral edge region of the Pass through cutting material support 2b. This supernatant Projections 5b are used, as can also be seen in FIG. 4b Stop edges for the item to be cut - if the operator has the Cutting material support 2b excessively pressurized, whereby a slot between the sections 5a and the Cutting material support 2b can be produced - so that even in In such a case, the desired orientation of the Cutting material is preserved.

These new measures for a Cutter for paper and the like causes materials besides an improvement of the cutting result and the Simplification of handling a reduction of Production costs for such a device compared known cutters.

From the partially broken representation in Figure 4a, the connection between the cutting plate 2 and one, here the left, side cheek 5 can be seen. In this case, for example, has the side cheek 5 via a projection 12 which is engageable in a recess 13 in the cutting plate 2 in engagement to align the two components to each other. According to the invention, the side wall 5 has a further dome-like projection 14, which passes through an opening 15 in the cutting plate 2, wherein this opening 15 in the relevant section also passes through the front wall 2c. This front wall 2c of the cutting plate 2 is formed by a leg-like angling by 90 ° of the longitudinal edge 2a opposite side of the cutting plate 2.
In the region of this opening 15, a further recess in the front wall 2c is incorporated from its edge region in the direction of the opening 15 such that a web 16 is formed in the latter 2c. This web 16 is arranged such that a screw 17, which is screwed in this drawing from below into the dome-like projection 14, cooperates with its screw head or another washer with this web 16. Thus, it is possible to attach very close to the side cheek 5 on the cutting plate 2 by this screw.
Advantageously, a plurality of these dome-like projections 14 and openings 15 are formed on a slitter or bar cutting device.

While in the illustration in Figure 4a, the viewing direction is directed to the left side cheek 5, Figure 4b shows a view of the right side cheek 5 of the slitter 1. This right side cheek 5 is in its laterally front, the cutting plate 2 facing body portion transversely, ie from its front wall up to the level of the longitudinal edge 2a of the cutting plate 2 shown cut. As can be seen in the right part of this figure, by means of the dome-like projection 14 of this right side cheek 5 and by means of the partially engaging in the front side wall 2c of the cutting plate 2 screw 17, both components 2 and 5 are fixed together close to each other.
The projections 5b on the portion 5a of the side cheek 5 pass through the cutting plate 2 from the cutting material support 2b. These projections 5b are, as already mentioned, dimensioned such that if the cutting plate 2 deflects, a possibly between the cutting material support 2b and the lower edge Section 5a forming a section-wise gap ensures a secure abutment of a cutting material placed on the cutting material 2b on the section 5a of the side wall 5.
With reference numeral 5c, a stiffening rib in the side cheek 5 is designated. In addition, it is still apparent that the cutting plate 2 is supported in the region of its longitudinal edge 2a with its outer edge region, ie only sideways, on a body projection 5d of the side cheek 5. In the area between the two side walls 5, the rigid support of the longitudinal edge 2a takes place through the bead 10 formed in the cutting plate 2, as already described above.

LIST OF REFERENCE NUMBERS

1

Slitter machine

2

cutting board

2a

Longitudinal edge of 2 (cutting edge)

2 B

Cutting material support of 2

2c

front wall of 2

3

traverse

3a, 3b, 3c

Pages from 3

4

Rolling cutter

5

Side cheeks of 1

5a

Section of 5 (attachment for the cutting material)

5b

Projection on 5a

5c

stiffening rib

5d

body protrusion

6

Breakthrough in 5

7

Slice 8 breakthrough in 7

9

Axis of 7

10

Beading on 2 11 terminal block

12

Projection 13 recess

14

domed projection 15 opening

16

Footbridge to 2

17

Screw (collar screw or screw with a washer)

a

Elevation of 11

Claims (20)

Paper cutting device, primarily a slitter-winder (1), with a cutting plate (2) and a slitter-cutting head (4) which can be moved in a traverse (3) parallel to a longitudinal edge (2a) of the cutting plate (2),
characterized in that
the traverse (3) has an asymmetrical profile. Slitter (1) according to claim 1,
characterized in that
the traverse (3) made of metal, in particular aluminum. Slitter (1) according to claim 1 or 2,
characterized in that
the crossmember (3) is formed with two sides (3a, 3b) which are essentially perpendicular to one another and an arcuate side (3c) when viewed in cross section. Locking device on a side wall (5) of a slitter-winder (1) for fixing a crossbeam (3), in particular according to one of claims 1 to 3, between two side walls (5),
characterized in that
the traverse (3) can be pushed through an opening (6) in a side wall (5) and the opening (6) is provided with a cover which is displaceable in the pushed-through state of the traverse (3) in front of the opening (6). Locking device according to claim 4,
characterized in that
the cover is a disc (7) rotatable about an axis (9) and having an opening (8) corresponding to the aperture (6). Locking device according to claim 4 or 5,
characterized in that
on the cover and / or the side cheek (5) locking projections and corresponding locking recesses are formed. Locking device according to one of claims 4 to 6,
characterized in that
the breakthrough (6) facing side of the cover is provided with a rising profile. Cutting device, in particular for paper, cardboard, plastic films or the like, with a knife, which is movable in a substantially parallel manner along a longitudinal edge (2a) of an insert (2),
characterized in that
the cutting plate (2) in the region of the cutting operation has at least one bead (10) for increasing the stability. Cutting device according to claim 8,
characterized in that
the bead (10) is arranged substantially parallel to the longitudinal edge (2a) of the cutting plate (2). Cutting device according to claim 8 or 9,
characterized in that
in the cutting plate (2) sections a plurality of beads (10), preferably side by side, are arranged. Cutting device according to claim 8, 9 or 10,
characterized in that
the cutting plate (2) consists of metal. Cutting device according to claim 8, 9, 10 or 11,
characterized in that
the bead (10) is arranged on the side of the longitudinal edge (2a) or the cutting plate (2) facing away from the blade. Cutting device according to one of claims 8 to 12,
characterized in that
the cutting device is a slitter (1) or a bar cutter. Cutting device with a cutting plate (2), a knife, which is movable substantially parallel to a longitudinal edge (2a) of the cutting plate (2), with a clamping device for fixing the cutting material to be cut,
characterized in that
a clamping strip (11) either only clamped on one side or a clamping bar clamped on both sides (11) in the middle region of the longitudinal edge (2a) in the direction of the cutting plate (2) is arched away. Cutting device according to claim 14,
characterized in that
the terminal strip (11) consists of plastic, in particular is transparent. Cutting device according to claim 14 or 15,
characterized in that
the clamping strip (11) can be detachably fastened to the cutting device, in particular on a slitter-winder (1) or a beam-cutting device. Slitter (1) with two side cheeks (5) for holding a traverse (3) for a roller cutting head (4), wherein the side cheeks (5) are arranged on a cutting plate (2) and the side cheeks (5) and the cutting plate (2) have mutually corresponding projections (12) and recesses or recesses (13),
characterized in that
the side cheeks (5) have a dome-shaped projection (14) which passes through a corresponding opening (15) in the cutting plate (2) and a screw arranged in the dome-like projection (14) with its screw head with a web (16) of the cutting plate (29 ) cooperates. Slitter (1) according to claim 17,
characterized in that
the web (16) is formed in a 90 ° angled edge region (17) of the cutting plate (2). Slitter (1) according to claim 17 or 18, characterized
characterized in that
on the side cheeks (5) sections (5a) are formed as stop edges for the cutting material, in particular at the portions (5a) projections (5b) are provided which engage through the cutting plate (2). Slitter (1)
characterized in that
it is designed according to one or more of the preceding claims.

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