EP2708336B1 - Device for cutting bread into slices - Google Patents

Device for cutting bread into slices Download PDF

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Publication number
EP2708336B1
EP2708336B1 EP13183653.8A EP13183653A EP2708336B1 EP 2708336 B1 EP2708336 B1 EP 2708336B1 EP 13183653 A EP13183653 A EP 13183653A EP 2708336 B1 EP2708336 B1 EP 2708336B1
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Prior art keywords
area
section
cutting
rotation
thickness
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German (de)
French (fr)
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EP2708336A1 (en
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Uwe Reifenhäuser
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    • 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
    • B26D1/12Cutting 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 cutting member moving about an axis
    • B26D1/14Cutting 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 cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/157Cutting 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 cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis
    • B26D1/16Cutting 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 cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a movable axis mounted on a movable arm or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00Machines or methods used for cutting special materials
    • B26D2210/02Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • B26D2210/06Machines or methods used for cutting special materials for cutting food products, e.g. food slicers for bread, e.g. bread slicing machines for use in a retail store

Definitions

  • the devices described above are mostly used in bakeries when a customer wishes to buy a loaf of bread that is cut into slices.
  • the swing arm In machines that are set up on the floor, the swing arm usually makes a rotating movement, in which case the circular knife is usually of such a size that it only penetrates the cross-section of the loaf of bread with less than half its cross-sectional area, so that the swing arm does not go through the cutting cross-section at all.
  • a cutting machine is for example from the DE 103 12 301 A1 known.
  • Other devices of the type described above are also the documents DE 37 06 485 A1 . DE 10 2005 062 501 A1 and DE 198 20 004 A1 removable.
  • the rocker arm only carries out an oscillating movement, that is to say it does not rotate by 360 degrees, but only oscillates by an angular range of less than 90 degrees. In this way, the overall height can be reduced and the suitability of the machine for installation on a table can be achieved. Furthermore, in order to reduce the size, the circular knife diameter is reduced in these cases, which means that the axis of rotation of the circular knife moves within the circular cross section, that is to say that the rocker arm penetrates into the loaf of bread during the cutting process.
  • the cutting gap between the insertion area and the removal area has a comparatively large width, which means that there is a risk that disks being cut or being cut are being drawn through the gap into the interior of the machine.
  • Table machines of the type described above are for example from the DE 37 06 485 A1 and the DE 1 982 049 2C1 known.
  • the invention is based on the object of further developing a device for cutting bread into slices in such a way that the cutting result is improved in terms of quality even with fresh bread and in the production of thin slices.
  • a thickness of the rocker housing measured perpendicular to the plane of the circular knife is greater than 20 mm and in one Longitudinal section of the rocker housing whose contour first has a wedge-shaped section, then in the thickening area has a section with maximum constant thickness and then a section with reduced thickness.
  • the "thickness of the rocker housing" in the sense of the present application is understood without the thickness of the circular knife which adjoins the rocker housing on the side facing the insertion area.
  • the invention takes the opposite path of deliberately increasing the thickness of the rocker housing.
  • This teaching is based on the knowledge that an increased thickness of the rocker housing has two positive effects for the cutting result: Firstly, the increased thickness of the rocker housing leads to a greater deflection, that is to say bending of the slice being formed away from the rest of the bread loaf. This in turn causes a bending stress in the area of the bread slice, which is located between the rocker housing area with the greatest thickness and the cutting edge of the circular knife, that is to say the area in which the slice being formed and the remaining loaf of bread "just barely" bonded are.
  • an increased deflection of the disk away from the knife into the removal area means that the cutting gap which arises between the insertion area and the removal area and is usually covered by a movable support element is bridged earlier and more securely, so that the bottom of the removal area itself Support function for the cut disc can take over. In this way, the risk that an emerging or just cut off disk is inadvertently drawn into an interior of the machine housing can be significantly reduced.
  • the rocker housing first has a wedge-shaped section in a contour considered in its longitudinal section, then a section with a maximum constant thickness and then a section with a reduced thickness in a thickening area.
  • the section with reduced thickness advantageously extends to the first axis of rotation, the maximum thickness in the thickening region preferably being at least 120%, preferably at least 140% of the thickness in the region with reduced thickness.
  • the reduction of the thickness following the thickening area has the advantage that the cutting gap, which is located between the insertion area and the removal area, can be kept smaller than would be the case if the rocker housing still reached its maximum when it passed through the cutting gap Fat man.
  • the maximum thickness is present in the region which passes through the maximum cutting cross section during the swinging movement and can there accordingly have an effect on the slices to be cut off.
  • the thickening area is located exclusively above the cutting gap between the insertion area and the removal area during the entire movement of the rocker.
  • a reduction in the gap area, which is made possible by the section of the rocker with a reduced thickness, is advantageous in that the necessary closure of the gap with a support element becomes easier.
  • a transition between the section with maximum thickness and the section with reduced thickness is arranged between the second axis of rotation and the section of the cutting edge of the circular knife facing the first axis of rotation.
  • the aforementioned transition is preferably at a distance from the second axis of rotation which is 25% to 50% of the radius of the circular knife. In this way, the thickening area is spatially limited to an area which is necessary to achieve the desired amplification of the deflection effect.
  • Apparatus 1 for cutting bread into slices has an insertion area 2 in the form of an approximately cubic shaft, into which a loaf of bread with the usual dimensions can be inserted.
  • a feed device 3 known from the prior art , which has a gripping device with gripper hooks for fixing a rear end of the loaf of bread, a linear guide for advancing the fixed loaf of bread along a bottom 4 of the insertion area 2 and a drive device (not shown) has both for the feed and for fixing the gripper hook.
  • the device 1 has a shaft-shaped removal area 5, which, viewed in the feed direction 6 , is linearly adjacent to the insertion area and is separated from it by a cutting device 7 .
  • the cutting means 7 comprises a about a first axis of rotation 8 in an oscillating pivoted rocker 9, to which a about a second axis of rotation 10 rotationally drivable circular blade is supported.
  • the drive for the oscillating movement of the rocker 9 and for the continuous rotation of the circular knife 11 relative to the rocker 9 take place by means of a common drive device 12, which is shown in the vertical section in FIG Figure 3 can be seen and is arranged below the bottom 4 of the insertion area 2 .
  • the rocker 9 has a rocker housing 13, in the interior of which is not visible in the figures there is a transmission device in the form of a belt drive for driving the circular knife 11 .
  • Such a drive device 12 both for driving the rocker 9 and the circular knife 11 is for example from the DE 37 06 485 A1 known.
  • a transmission device in the form of a belt drive which, regardless of the state of motion of the rocker 9, ensures a uniform rotational movement of the circular knife at high speed even when the device 1 is in the cutting mode.
  • the swing arm 9 and the swing arm housing 13 are in the Figures 6a to 6c explained in more detail.
  • Out Figure 6b it follows that the rocker housing in a thickening area 14 has a conspicuously large thickness 15 , measured in the direction of the axis of rotation 10 of the circular knife 11 , which in the specific case is 23 mm.
  • the rocker housing in a thickening area 14 has a conspicuously large thickness 15 , measured in the direction of the axis of rotation 10 of the circular knife 11 , which in the specific case is 23 mm.
  • the distance 19 of the transition 17 between the section 18 with reduced thickness from the thickening area 14 is approximately 40% of the radius of the circular knife.
  • the thickness 15 in the thickening area 14 is significantly larger (6.5 mm in the present case) than would actually be required to cover the transmission device located in the interior of the rocker housing 13 .
  • the minimum required thickness 20 is in the area 18 with a reduced thickness and, as already mentioned above, is 16.5 mm.
  • an imaginary line 21 is entered in dashed form on the left side of the rocker housing 13 .
  • To the right of this line 21 there is a free space 22 within the rocker housing 13 , which was created solely to achieve the increased thickness 15 of the rocker housing 13 in connection with the wedge-shaped section 16 and thus to achieve particularly good cutting properties.
  • the free space 22 should remain hollow.
  • the rocker housing 13 deliberately has a significantly larger radius 24 in an annular cover area 23 than in an adjoining area in which the radius 25 - as is customary in the prior art - is dimensioned such that the transmission device inside the Swingarm housing 13 is completely covered to form a wedge-shaped section.
  • a free, not covered area 26 between the cutting edge 27 of the circular knife 11 and the part-circular outer edge 28 of the rocker housing 13 in the cover area 23 is greatly reduced. This in turn leads to a significantly reduced friction between the rapidly rotating circular knife 11 and the bread slice that is just being formed, so that the force effects on the slice and the risk of damage to the same are also minimized.
  • a radially measured distance 36 between the edge 28 of the rocker housing 13 in the cover area 23 and the cutting edge 27 of the circular knife 11 in the cover area 23 is smaller than a difference between a radius 30 of the circular knife 11 and a minimum half width 31 of the rocker housing 13 within an overlap area of the rocker housing 13 with the circular knife 11.
  • the roughly hammer-shaped cover area 23 extends over an angular area 32 of approximately 140 °.
  • a core region of the covering region 23 in which the radius 24 has its largest dimension and is constant, extends over an angular region 33 of approximately 90 °.
  • a central axis 34 of the cover area 23 extends at an angle to a longitudinal axis 35 of the rocker 9 , which connects the two axes of rotation 8, 10 to one another. The angle here is around 130 °.
  • the distance 36 between the radius 30 of the circular knife 11 and the radius 24 in the covering area 23 is approximately 14 mm.
  • a cutting gap 38 is formed between the bottom 4 of the insertion area 2 and a bottom 37 of the removal area 5 , through which both the rocker 9 with its rocker housing 13 and the circular knife 11 step through. While the circular knife 11 is at a very short distance from a front edge 39 of the bottom 4 of the insertion area 2 , so that the front edge 39 serves as a counter-cutting edge, the distance from a front edge 40 of the bottom 37 of the removal area 5 is very much larger due to the cutting gap 38 .
  • the cutting gap 38 is starting from the bottom 37 of the Removal area 5 closed by means of a support element 42 .
  • the support element 42 has the shape of a strip made of a food-safe, elastic plastic material that extends over the entire width of the removal area 5 (and even beyond) and is fastened to the underside of the bottom 37 of the removal area 5 in a manner which will be explained in more detail later.
  • the support element 42 is at such a distance from the front edge 39 of the bottom 4 of the insertion area 2 that it leaves sufficient space for the circular knife 11 even in a straight, straight state. A collision between the circular knife 11 and the support element 42 can therefore never occur.
  • the thickness 20 of the rocker housing 13 in the area 18 with reduced thickness (see Figures 6b and 6c ) greater than the remaining free space between the support element 42 and the front edge 39 of the bottom 4 of the insertion area 2 .
  • the support element 42 is deformed by the rocker housing 13 in this section 18 , which ends to the right and left in a wedge-shaped region 43, 44 , corresponding to the rocker movement in the cutting gap 38 .
  • the support element In the undeformed sections of the support element which are aligned approximately parallel to the base 37 of the removal region, the support element is in a support position in which it prevents the disks which are being created from reaching a machine interior located below the support element 42 .
  • the support element 42 is displaced into a release position by the rocker 9 , namely through the frictional contact with the surface of the rocker housing 13 and the normal forces caused thereby, so that the rocker 9 can execute its oscillating movement.
  • the support element 42 In the release position, the support element 42 is subjected to bending and is elastically pretensioned, so that it automatically returns to the support position in the course of a continuous movement of the rocker 9 as soon as the space previously occupied by the rocker housing 13 in the cutting gap 38 has been released again at the corresponding point ,
  • Figure 7 shows in a detailed view that the rocker 9 with the overlap area 23 extends to a small front part into a gap between the side wall 45 of the insertion area 2 and an opposite side wall 47 of the removal area 5 .
  • the overlap area 23 of the rocker housing 13 also extends with a small part below the bottom 4 of the insertion area 2 , so that even when cutting in the corner area 48 there is very extensive coverage of the sector of the side face of the circular knife 11 that is relevant there, even taking into account a certain height offset between the bottom 4 of the insertion area 2 and the bottom 37 of the removal area 5 (see in particular in Figure 11 ) .
  • Out Figure 11 it can also be seen that during its oscillating movement through the cutting gap 38 , the oscillating housing 13 only interacts with its section 18 with a reduced thickness (compared to the thickening region 14 ) with the support element 42 .
  • the attachment of the support element 42 results from the Figures 8 to 10 : It can be seen that the bottom 37 of the removal area 5 is slightly angled upward in an end section 49 . Below the base 37 is a connecting section 50 of the support element 42 , which is clamped by means of a clamping bar 51 and screws 52 (which interact with invisible weld nuts on the underside of the base 37 ). A cantilever section 53 of the support element 42 projects over a front edge 55 of the angled end section 49 of the base 37 and over a front edge 54 of the clamping strip 51 and is therefore located in the cutting gap 38 .
  • the metallic terminal block 51 is slightly angled in accordance with the bottom 37 and also overlaps its end section 49 , so that the connecting section 50 assumes a correspondingly angled shape.
  • the cantilever section 53 is deformed by the rocker 9 inserted into the cutting gap 38 from below, whereby it deforms elastically up to an almost vertical alignment of its edge.
  • Out Figure 9 the height offset 56 between the bottom 4 of the insertion area 2 and the bottom 37 of the removal area 5 can again be seen.

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  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food-Manufacturing Devices (AREA)

Description

Einleitungintroduction

Die Erfindung betrifft eine Vorrichtung zum Schneiden von Brot in Scheiben mit

  1. a) einem Einlegebereich, in den ein Brotlaib einlegbar ist,
  2. b) einer Schneideinrichtung, die eine um eine erste Drehachse drehbare Schwinge und ein an der Schwinge um eine zweite Drehachse rotierbar gelagertes Kreismesser aufweist, wobei die zweite Drehachse sich innerhalb eines Schneidquerschnitts bewegt,
  3. c) einer Vorschubeinrichtung, mit der ein in dem Einlegebereich befindlicher Brotlaib so auf die Schneideinrichtung zu vorschiebbar ist, dass an einem vorderen Ende des Brotlaibs von diesem mittels der Schneideinrichtung sukzessive Scheiben abschneidbar sind,
  4. d) einem Entnahmebereich, in dem die abgeschnittenen Scheiben aufnehmbar sind,
  5. e) einer in einem Innenraum eines Schwingengehäuses angeordneten Übertragungseinrichtung zum Antrieb des Kreismessers, wobei das Schwingengehäuse in einem der ersten Drehachse abgewandten Ende in einem senkrecht zu einer Ebene des Kreismessers orientierten Längsschnitt keilförmig ausläuft.
The invention relates to a device for cutting bread into slices with
  1. a) an insertion area into which a loaf of bread can be inserted,
  2. b) a cutting device which has a rocker that is rotatable about a first axis of rotation and a circular knife mounted on the rocker about a second axis of rotation, the second axis of rotation moving within a cutting cross section,
  3. c) a feed device with which a loaf of bread located in the insertion area can be pushed towards the cutting device in such a way that slices can be successively cut off by means of the cutting device at a front end of the loaf of bread,
  4. d) a removal area in which the cut-off slices can be picked up,
  5. e) a transmission device arranged in an interior of a rocker housing for driving the circular knife, the rocker housing tapering wedge-shaped in an end facing away from the first axis of rotation in a longitudinal section oriented perpendicular to a plane of the circular knife.

Stand der TechnikState of the art

Die vorstehend beschriebenen Vorrichtungen werden meist in Bäckereien verwendet, wenn ein Kunde beim Kauf eines Brotlaibs wünscht, dass dieses in Scheiben aufgeschnitten wird. Bei Maschinen, die auf dem Fußboden aufgestellt werden, vollführt die Schwinge meist eine umlaufende Drehbewegung, wobei in diesem Fall meist das Kreismesser eine solche Größe hat, dass es lediglich mit weniger als der Hälfte seiner Querschnittsfläche in den Querschnitt des Brotlaibs eindringt, sodass die Schwinge selbst den Schneidquerschnitt überhaupt nicht durchläuft. Eine derartige Schneidmaschine ist beispielsweise aus der DE 103 12 301 A1 bekannt. Weitere Vorrichtungen der eingangs beschriebenen Art sind darüber hinaus den Dokumenten DE 37 06 485 A1 , DE 10 2005 062 501 A1 und DE 198 20 004 A1 entnehmbar.The devices described above are mostly used in bakeries when a customer wishes to buy a loaf of bread that is cut into slices. In machines that are set up on the floor, the swing arm usually makes a rotating movement, in which case the circular knife is usually of such a size that it only penetrates the cross-section of the loaf of bread with less than half its cross-sectional area, so that the swing arm does not go through the cutting cross-section at all. Such a cutting machine is for example from the DE 103 12 301 A1 known. Other devices of the type described above are also the documents DE 37 06 485 A1 . DE 10 2005 062 501 A1 and DE 198 20 004 A1 removable.

Werden derartige mit einem Orbital-Messer-Antrieb versehene Brotschneidemaschinen als Tischmaschinen ausgeführt, so vollführt die Schwinge lediglich eine schwingende Bewegung, das heißt sie dreht sich nicht um 360 Grad, sondern oszillieret lediglich um einen Winkelbereich von kleiner als 90 Grad. Auf diese Weise kann die Bauhöhe reduziert und die Eignung der Maschine zur Aufstellung auf einem Tisch erzielt werden. Des Weiteren wird zur Baugrößenreduzierung in diesen Fällen der Kreismesser-Durchmesser reduziert, wodurch es erforderlich ist, dass die Drehachse des Kreismessers sich innerhalb des Kreisquerschnitts bewegt, das heißt dass die Schwinge während des Schneidprozesses in den Brotlaib eindringt.If such bread slicing machines provided with an orbital knife drive are designed as table machines, the rocker arm only carries out an oscillating movement, that is to say it does not rotate by 360 degrees, but only oscillates by an angular range of less than 90 degrees. In this way, the overall height can be reduced and the suitability of the machine for installation on a table can be achieved. Furthermore, in order to reduce the size, the circular knife diameter is reduced in these cases, which means that the axis of rotation of the circular knife moves within the circular cross section, that is to say that the rocker arm penetrates into the loaf of bread during the cutting process.

In diesem Fall sind besondere Maßnahmen zu treffen, sodass durch die gegenüber der reinen Kreismesserdicke vergrößerte Dicke der Schwinge keine Beschädigung des Brotes während des Schneidevorgangs eintritt. Darüber hinaus besitzt der Schneidspalt zwischen dem Einlegebereich und dem Entnahmebereich eine vergleichsweise große Breite, die dazu führt, dass eine Gefahr besteht, dass gerade im Entstehen begriffene oder abgeschnittene Scheiben durch den Spalt hindurch in das Innere der Maschine hinein gezogen werden.In this case, special measures must be taken so that the breadth of the rocker, which is larger than the thickness of the circular knife, does not damage the bread during the cutting process. In addition, the cutting gap between the insertion area and the removal area has a comparatively large width, which means that there is a risk that disks being cut or being cut are being drawn through the gap into the interior of the machine.

Tischmaschinen der vorbeschriebenen Art sind beispielsweise aus der DE 37 06 485 A1 und der DE 1 982 049 2C1 bekannt.Table machines of the type described above are for example from the DE 37 06 485 A1 and the DE 1 982 049 2C1 known.

Das Problem des in den Schneidquerschnitt eindringenden verdickten Schwingenbereichs wurde im Stand der Technik stets dadurch zu lösen versucht, dass das Schwingengehäuse - in eine Richtung senkrecht zu der Kreismesserebene betrachtet - schmaler, das heißt flacher ausgebildet wurde und der Keilwinkel am Ende des Schwingengehäuses kleiner gewählt wurde. Darüber hinaus wurde versucht, die in Richtung parallel zu der Kreismesserebene gemessene Breite der Schwinge zu reduzieren, um auch auf diese Weise das Schwingengehäuse zu verkleinern, um möglichst über einen großen Anteil der Kreismesserfläche mit der sehr geringen Dicke des Kreismessers in den Brotlaib eindringen zu können. Gleichwohl entstehen beim Aufschneiden von frischen und weichen Broten (z.B. Weißbrot) sowie bei der Erzeugung von Scheiben mit geringer Dicke (6 mm und weniger) bei den bekannten Maschinen Schwierigkeiten, die sich in einem Zerreißen der Scheiben oder einer irreversiblen Quetschung äußern.The problem of the thickened rocker area penetrating into the cutting cross section has always been attempted in the prior art by designing the rocker housing to be narrower, i.e. flatter, when viewed in a direction perpendicular to the plane of the circular knife, and by selecting the wedge angle at the end of the rocker housing to be smaller , In addition, attempts were made to reduce the width of the rocker, measured in the direction parallel to the circular knife plane, in order in this way to reduce the size of the rocker housing in order to be able to penetrate into the loaf of bread with the very small thickness of the circular knife, as far as possible , Nevertheless, when slicing fresh and soft bread (e.g. white bread) and when producing slices of small thickness (6 mm and less), difficulties arise in the known machines, which manifest themselves in tearing the slices or in an irreversible crushing.

Aufgabetask

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Schneiden von Brot in Scheiben dahingehend weiter zu entwickeln, dass das Schneidergebnis in qualitativer Hinsicht auch bei frischen Broten und bei der Erzeugung dünner Scheiben verbessert wird.The invention is based on the object of further developing a device for cutting bread into slices in such a way that the cutting result is improved in terms of quality even with fresh bread and in the production of thin slices.

Lösungsolution

Ausgehend von einer Vorrichtung der eingangs beschriebenen Art wird die vorstehende Aufgabe erfindungsgemäß dadurch gelöst, dass in einem Verdickungsbereich, in dem das Schwingengehäuse und das Kreismesser sich überlappen, eine senkrecht zu der Ebene des Kreismessers gemessene Dicke des Schwingengehäuses größer als 20 mm ist und in einem Längsschnitt des Schwingengehäuses dessen Kontur zunächst einen keilförmigen Abschnitt, sodann in dem Verdickungsbereich einen Abschnitt mit maximaler konstanter Dicke und anschließend einen Abschnitt mit reduzierter Dicke besitzt.Starting from a device of the type described in the introduction, the above object is achieved according to the invention in that in a thickening area in which the rocker housing and the circular knife overlap, a thickness of the rocker housing measured perpendicular to the plane of the circular knife is greater than 20 mm and in one Longitudinal section of the rocker housing whose contour first has a wedge-shaped section, then in the thickening area has a section with maximum constant thickness and then a section with reduced thickness.

Die "Dicke des Schwingengehäuses" im Sinne der vorliegenden Anmeldung versteht sich ohne die Dicke des Kreismessers, das auf der dem Einlegebereich zugewandten Seite des Schwingengehäuses an dieses anschließt.The "thickness of the rocker housing" in the sense of the present application is understood without the thickness of the circular knife which adjoins the rocker housing on the side facing the insertion area.

Entgegen dem jahrzehntelangen Trend bei Tischmaschinen mit oszillierend hin und her bewegter Schwinge, die Dicke des Schwingengehäuses so weit irgendwie möglich zu reduzieren, beschreitet die Erfindung genau den entgegen gesetzten Weg einer bewussten Vergrößerung der Dicke des Schwingengehäuses. Dieser Lehre liegt die Erkenntnis zugrunde, dass mit einer gesteigerten Dicke des Schwingengehäuses zwei für das Schneidergebnis positive Effekte einhergehen: Zum einen führt die vergrößerte Dicke des Schwingengehäuses zu einer stärkeren Ablenkung, das heißt Verbiegung der im Entstehen begriffenen Scheibe von dem restlichen Brotlaib weg. Dies wiederum bewirkt einerseits eine Biegespannung in dem Bereich der Brotscheibe, die sich zwischen dem Schwingengehäusebereich mit der größten Dicke und der Schneidkante des Kreismessers befindet, das heißt dem Bereich, in dem die im Entstehen begriffene Scheibe und der restliche Brotlaib "gerade noch so" verbunden sind. Die vorgenannte erhöhte Biegespannung versucht den von dem Kreismesser geschaffenen Schneidspalt zu öffnen, das heißt erleichtert dem Kreismesser den Schneidvorgang. Zum anderen führt die stärkere Biegung und Ablenkung der im Entstehen begriffenen Scheibe auch zu einem verminderten Anhaften der dem Kreismesser zugewandten Scheibenoberfläche an dem Kreismesser.Contrary to the decades-long trend in table machines with an oscillating rocker arm to reduce the thickness of the rocker housing as much as possible, the invention takes the opposite path of deliberately increasing the thickness of the rocker housing. This teaching is based on the knowledge that an increased thickness of the rocker housing has two positive effects for the cutting result: Firstly, the increased thickness of the rocker housing leads to a greater deflection, that is to say bending of the slice being formed away from the rest of the bread loaf. This in turn causes a bending stress in the area of the bread slice, which is located between the rocker housing area with the greatest thickness and the cutting edge of the circular knife, that is to say the area in which the slice being formed and the remaining loaf of bread "just barely" bonded are. The above-mentioned increased bending stress tries to open the cutting gap created by the circular knife, that is, it makes the cutting process easier for the circular knife. On the other hand, the greater bending and deflection of the disk in the process of being created also leads to a reduced adherence of the disk surface facing the circular knife to the circular knife.

Optimal ist in diesem Zusammenhang sogar die Erzeugung eines bewussten Abstandes zwischen der der entstehenden Scheibe zugewandten Messeroberfläche und der Scheibe selbst in einem Bereich zwischen der Schneidkante und dem Schwingengehäusebereich mit der größten Dicke. Aufgrund eines derartigen Abstandes zwischen Scheibe und Messer bzw. zumindest aufgrund des reduzierten Anpressdrucks in diesem Bereich, wird die Reibung reduziert und die Gefahr einer ungewollten Scheibendeformation bzw. -beschädigung vermindert.In this context, it is even optimal to generate a deliberate distance between the knife surface facing the resulting disc and the disc itself in a region between the cutting edge and the rocker housing region with the greatest thickness. Because of such a distance between the disc and the knife or at least because of the reduced contact pressure in this area, the friction is reduced and the risk of undesired disc deformation or damage is reduced.

Ferner führt eine verstärkte Ablenkung der Scheibe von dem Messer weg in den Entnahmebereich hinein dazu, dass der zwischen dem Einlegebereich und dem Entnahmebereich entstehende Schneidspalt, der üblicherweise mittels eines beweglichen Stützelements abgedeckt ist, früher und sicherer überbrückt wird, sodass der Boden des Entnahmebereichs selbst die Stützfunktion für die abgeschnittene Scheibe übernehmen kann. Die Gefahr, dass eine im Entstehen begriffene oder gerade abgeschnittene Scheibe ungewollt in einen Innenraum des Maschinengehäuses eingezogen wird, kann auf diese Weise deutlich reduziert werden.Furthermore, an increased deflection of the disk away from the knife into the removal area means that the cutting gap which arises between the insertion area and the removal area and is usually covered by a movable support element is bridged earlier and more securely, so that the bottom of the removal area itself Support function for the cut disc can take over. In this way, the risk that an emerging or just cut off disk is inadvertently drawn into an interior of the machine housing can be significantly reduced.

Dies gilt umso mehr, da erfindungsgemäß das Schwingengehäuses in einer in dessen Längsschnitt betrachteten Kontur zunächst einen keilförmigen Abschnitt, sodann in einem Verdickungsbereich einen Abschnitt mit maximaler konstanter Dicke und anschließend einen Abschnitt mit reduzierter Dicke besitzt. Vorteilhafterweise erstreckt sich der Abschnitt mit reduzierter Dicke bis zu der ersten Drehachse, wobei vorzugsweise die maximale Dicke in dem Verdickungsbereich mindestens 120 %, vorzugsweise mindestens 140 % der Dicke in dem Bereich mit reduzierter Dicke beträgt.This is all the more true since, according to the invention, the rocker housing first has a wedge-shaped section in a contour considered in its longitudinal section, then a section with a maximum constant thickness and then a section with a reduced thickness in a thickening area. The section with reduced thickness advantageously extends to the first axis of rotation, the maximum thickness in the thickening region preferably being at least 120%, preferably at least 140% of the thickness in the region with reduced thickness.

Die erfindungsgemäße Reduzierung der Dicke im Anschluss an den Verdickungsbereich hat den Vorteil, dass der Schneidspalt, der sich zwischen dem Einlegebereich und dem Entnahmebereich befindet, kleiner gehalten werden kann, als dies der Fall wäre, wenn das Schwingengehäuse beim Durchtritt durch den Schneidspalt noch seine maximale Dicke besäße. Um den weiter oben beschriebenen Ablenkungseffekt zu erzielen, ist es ausreichend, wenn die maximale Dicke in dem Bereich vorliegt, der während der Schwingenbewegung den maximalen Schneidquerschnitt durchläuft und entsprechend dort eine Wirkung auf die abzuschneidenden Scheiben entfalten kann. In diesem Zusammenhang ist nach einer Ausgestaltung der Erfindung vorgesehen, dass der Verdickungsbereich sich während der gesamten Bewegung der Schwinge ausschließlich oberhalb des Schneidspalts zwischen dem Einlegebereich und dem Entnahmebereich befindet. Eine Reduzierung des Spaltbereichs, die durch den Abschnitt der Schwinge mit reduzierter Dicke ermöglicht wird, ist insofern vorteilhaft, als der notwendige Verschluss des Spaltes mit einem Stützelement einfacher wird.The reduction of the thickness following the thickening area according to the invention has the advantage that the cutting gap, which is located between the insertion area and the removal area, can be kept smaller than would be the case if the rocker housing still reached its maximum when it passed through the cutting gap Fat man. In order to achieve the deflection effect described above, it is sufficient if the maximum thickness is present in the region which passes through the maximum cutting cross section during the swinging movement and can there accordingly have an effect on the slices to be cut off. In this context, it is provided according to one embodiment of the invention that the thickening area is located exclusively above the cutting gap between the insertion area and the removal area during the entire movement of the rocker. A reduction in the gap area, which is made possible by the section of the rocker with a reduced thickness, is advantageous in that the necessary closure of the gap with a support element becomes easier.

Auch bei der erfindungsgemäß vergrößerten Dicke des Schwingengehäuses hat es sich als vorteilhaft herausgestellt, einen Keilwinkel des im Längsschnitt keilförmigen Endes des Schwingengehäuses zwischen 10° und 30°, vorzugsweise zwischen 15° und 25°, zu wählen. Ein derartige vergleichsweise kleiner Keilwinkel führt in Verbindung mit der größeren Gehäusedicke zu einer Reduzierung der Gefahr, dass die entstehende Scheibe punktuell zu stark abgelenkt oder gequetscht und dadurch möglicherweise in ihrer Integrität bzw. den Struktureigenschaften beschädigt wird.Even with the increased thickness of the rocker housing according to the invention, it has proven to be advantageous to choose a wedge angle of the end of the rocker housing which is wedge-shaped in longitudinal section between 10 ° and 30 °, preferably between 15 ° and 25 °. Such a comparatively small wedge angle, in conjunction with the greater housing thickness, leads to a reduction in the risk that the resulting disk will pinpoint severely distracted or bruised and this may damage its integrity or structural properties.

Gemäß einer Weiterbildung der Erfindung ist ein Übergang zwischen dem Abschnitt mit maximaler Dicke zu dem Abschnitt mit reduzierter Dicke zwischen der zweiten Drehachse und dem der ersten Drehachse zugewandten Abschnitt der Schneidkante des Kreismessers angeordnet. Dabei besitzt der vorgenannte Übergang vorzugsweise einen Abstand von der zweiten Drehachse, der 25 % bis 50 % des Radius des Kreismessers beträgt. Der Verdickungsbereich wird auf diese Weise räumlich auf einen Bereich begrenzt, der zur Erzielung der gewünschten Verstärkung des Ablenkeffekts erforderlich ist.According to a development of the invention, a transition between the section with maximum thickness and the section with reduced thickness is arranged between the second axis of rotation and the section of the cutting edge of the circular knife facing the first axis of rotation. The aforementioned transition is preferably at a distance from the second axis of rotation which is 25% to 50% of the radius of the circular knife. In this way, the thickening area is spatially limited to an area which is necessary to achieve the desired amplification of the deflection effect.

Ausführungsbeispielembodiment

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels einer Schneidvorrichtung, die in der Zeichnung dargestellt ist, näher erläutert. Es zeigt:

Fig. 1:
Eine perspektivische Darstellung einer erfindungsgemäßen Vorrichtung mit Blick auf die Schwinge nach Demontage des Entnahmebereichs,
Fig. 2:
eine Draufsicht auf die Vorrichtung mit Darstellung sowohl des Einlegebereichs als auch des Entnahmebereichs,
Fig. 3:
einen Vertikalschnitt durch die Vorrichtung mit Blickrichtung von der Rückseite,
Fig. 4:
einen Vertikalschnitt durch die Vorrichtung mit Blickrichtung von der Vorderseite,
Fig. 5:
einen Vertikalschnitt durch die Vorrichtung mit Blickrichtung von dem Entnahmebereich her,
Fig. 6a bis 6c:
die Schwinge in einer Draufsicht, Seitenansicht sowie perspektivischen Ansicht,
Fig. 7:
eine Detailansicht der Schwinge in einer Ecke des Entnahmebereichs,
Fig. 8:
einen Vertikalschnitt durch einen Boden des Entnahmebereichs sowie durch ein Stützelement,
Fig. 9:
wie Figur 8, jedoch in einer um 90° gedrehten Ansicht,
Fig. 10:
eine perspektivische Ansicht des Bodens des Entnahmebereichs sowie der daran befestigten Stützeinrichtung,
Fig. 11 bis 13:
unterschiedliche perspektivische Ansichten der durch die Schwinge verformten Stützeinrichtung.
The invention is explained in more detail below using an exemplary embodiment of a cutting device, which is shown in the drawing. It shows:
Fig. 1:
A perspective view of a device according to the invention with a view of the rocker after dismantling the removal area,
Fig. 2:
2 shows a plan view of the device, showing both the insertion area and the removal area,
Fig. 3:
a vertical section through the device viewed from the rear,
Fig. 4:
a vertical section through the device viewed from the front,
Fig. 5:
a vertical section through the device as viewed from the removal area,
6a to 6c:
the rocker in a top view, side view and perspective view,
Fig. 7:
a detailed view of the swing arm in a corner of the removal area,
Fig. 8:
a vertical section through a bottom of the removal area and through a support element,
Fig. 9:
how Figure 8 , but in a view rotated by 90 °,
Fig. 10:
a perspective view of the bottom of the removal area and the support device attached thereto,
11 to 13:
different perspective views of the support device deformed by the rocker.

Eine in den Figuren 1 bis 5 in verschiednen Ansichten dargestellte Vorrichtung 1 zum Schneiden von Brot in Scheiben, besitzt einen Einlegebereich 2 in Form eines ungefähr kubischen Schachtes, in den ein Brotlaib mit üblichen Abmessungen einlegbar ist. Innerhalb des Einlegebereichs 2 befindet sich eine aus dem Stand der Technik bekannte Vorschubeinrichtung 3, die über eine Greifeinrichtung mit Greiferhaken zum Fixieren eines hinteren Endes des Brotlaibs, eine Linearführung zum Vorschieben des fixierten Brotlaibs entlang eines Bodens 4 des Einlegebereichs 2 sowie über eine nicht dargestellte Antriebseinrichtung sowohl für den Vorschub als auch für das Fixieren der Greiferhaken verfügt.One in the Figures 1 to 5 Apparatus 1 for cutting bread into slices, shown in different views, has an insertion area 2 in the form of an approximately cubic shaft, into which a loaf of bread with the usual dimensions can be inserted. Within the insertion area 2 there is a feed device 3 known from the prior art , which has a gripping device with gripper hooks for fixing a rear end of the loaf of bread, a linear guide for advancing the fixed loaf of bread along a bottom 4 of the insertion area 2 and a drive device ( not shown) has both for the feed and for fixing the gripper hook.

Des Weiteren besitzt die Vorrichtung 1 einen schachtförmigen Entnahmebereich 5, der sich, in Vorschubrichtung 6 betrachtet, linear im Anschluss an den Einlegebereich befindet und von diesem durch eine Schneideinrichtung 7 getrennt ist.Furthermore, the device 1 has a shaft-shaped removal area 5, which, viewed in the feed direction 6 , is linearly adjacent to the insertion area and is separated from it by a cutting device 7 .

Die Schneideinrichtung 7 weist eine um eine erste Drehachse 8 oszillierend schwenkbar gelagerte Schwinge 9 auf, an der ein um eine zweite Drehachse 10 rotatorisch antreibbares Kreismesser 11 gelagert ist. Der Antrieb für die oszillierende Bewegung der Schwinge 9 sowie für die kontinuierliche Rotation des Kreismessers 11 relativ zu der Schwinge 9 erfolgen mittels einer gemeinsamen Antriebseinrichtung 12, die aus dem Vertikalschnitt in Figur 3 ersichtlich ist und unterhalb des Bodens 4 des Einlegebereichs 2 angeordnet ist. Die Schwinge 9 besitzt ein Schwingengehäuse 13, in dessen in den Figuren nicht sichtbaren Innenraum sich eine Übertragungseinrichtung in Form eines Riementriebs zum Antrieb des Kreismessers 11 befindet. Eine derartige Antriebseinrichtung 12 sowohl zum Antrieb der Schwinge 9 als auch des Kreismessers 11 ist beispielsweise aus der DE 37 06 485 A1 bekannt.The cutting means 7 comprises a about a first axis of rotation 8 in an oscillating pivoted rocker 9, to which a about a second axis of rotation 10 rotationally drivable circular blade is supported. 11 The drive for the oscillating movement of the rocker 9 and for the continuous rotation of the circular knife 11 relative to the rocker 9 take place by means of a common drive device 12, which is shown in the vertical section in FIG Figure 3 can be seen and is arranged below the bottom 4 of the insertion area 2 . The rocker 9 has a rocker housing 13, in the interior of which is not visible in the figures there is a transmission device in the form of a belt drive for driving the circular knife 11 . Such a drive device 12 both for driving the rocker 9 and the circular knife 11 is for example from the DE 37 06 485 A1 known.

In einem Innenraum eines Schwingengehäuses 13 befindet sich eine Übertragungseinrichtung in Form eines Riementriebs, die unabhängig von dem Bewegungszustand der Schwinge 9 selbst im Schneidbetrieb der Vorrichtung 1 für eine gleichförmige Drehbewegung des Kreismessers mit hoher Drehzahl sorgt.In an interior of a rocker housing 13 there is a transmission device in the form of a belt drive which, regardless of the state of motion of the rocker 9, ensures a uniform rotational movement of the circular knife at high speed even when the device 1 is in the cutting mode.

Die Schwinge 9 und das Schwingengehäuse 13 sind in den Figuren 6a bis 6c näher erläutert. Aus Figur 6b ergibt sich, dass das Schwingengehäuse in einem Verdickungsbereich 14 eine auffällig große, in Richtung der Drehachse 10 des Kreismessers 11 gemessene Dicke 15 aufweist, die im konkreten Fall 23 mm beträgt. Betrachtet man die Kontur der Schwinge ausgehend von einer Spitze 15', an der eine Längsschnittebene die Umlaufkante des Schwingengehäuses 13 schneidet, so weist diese zunächst einen keilförmigen Abschnitt 16 auf, an den sich sodann ein Abschnitt mit konstanter Dicke anschließt, der den Verdickungsbereich 14 bildet. Daran schließt sich hinter einem Übergang 17 in Form eines Rücksprungs ein Abschnitt 18 mit reduzierter Dicke an, die im vorliegenden Fall 16,5 mm beträgt. Der Abstand 19 des Übergangs 17 zwischen dem Abschnitt 18 mit reduzierter Dicke von dem Verdickungsbereich 14 beträgt etwa 40 % des Radius des Kreismessers.The swing arm 9 and the swing arm housing 13 are in the Figures 6a to 6c explained in more detail. Out Figure 6b it follows that the rocker housing in a thickening area 14 has a conspicuously large thickness 15 , measured in the direction of the axis of rotation 10 of the circular knife 11 , which in the specific case is 23 mm. Consider the contour of the rocker starting from a tip 15 ' , on which a longitudinal section plane If the circumferential edge of the rocker housing 13 intersects, it first has a wedge-shaped section 16 , which is then followed by a section with a constant thickness, which forms the thickening area 14 . This is followed by a section 18 of reduced thickness behind a transition 17 in the form of a recess, which in the present case is 16.5 mm. The distance 19 of the transition 17 between the section 18 with reduced thickness from the thickening area 14 is approximately 40% of the radius of the circular knife.

Wie sich wiederum insbesondere aus Figur 6b ergibt, ist die Dicke 15 in dem Verdickungsbereich 14 deutlich größer (im vorliegenden Fall 6,5 mm) als dies zur Abdeckung der im Inneren des Schwingengehäuses 13 befindlichen Übertragungseinrichtung eigentlich erforderlich wäre. Die minimal erforderliche Dicke 20 liegt in dem Bereich 18 mit reduzierter Dicke vor und beträgt, wie bereits oben erwähnt, 16,5 mm. In diesem Abstand von der in Figur 6b linken Seite des Schwingengehäuses 13 ist in gestrichelter Form eine gedachte Linie 21 eingetragen. Rechts dieser Linie 21 befindet sich innerhalb des Schwingengehäuses 13 ein Freiraum 22, der allein deshalb geschaffen wurde, um in Verbindung mit dem keilförmigen Abschnitt 16 die vergrößerte Dicke 15 des Schwingengehäuses 13 zu erzielen und damit besonders gute Schneideigenschaften zu erzielen. Um die oszillierend bewegte Masse der Schwinge 9, worin auch die des Schwingengehäuses 13 eingeht, klein zu halten, sollte der Freiraum 22 hohl bleiben.How in particular turns out Figure 6b results, the thickness 15 in the thickening area 14 is significantly larger (6.5 mm in the present case) than would actually be required to cover the transmission device located in the interior of the rocker housing 13 . The minimum required thickness 20 is in the area 18 with a reduced thickness and, as already mentioned above, is 16.5 mm. At this distance from the in Figure 6b an imaginary line 21 is entered in dashed form on the left side of the rocker housing 13 . To the right of this line 21 there is a free space 22 within the rocker housing 13 , which was created solely to achieve the increased thickness 15 of the rocker housing 13 in connection with the wedge-shaped section 16 and thus to achieve particularly good cutting properties. In order to keep the oscillating mass of the rocker 9 , which also includes that of the rocker housing 13 , small, the free space 22 should remain hollow.

Mit Blick auf die Figuren 6a und 6c wird deutlich, dass das Schwingengehäuse 13 in einem kreisringförmigen Abdeckbereich 23 bewusst einen deutlich größeren Radius 24 aufweist, als in einem daran angrenzenden Bereich, in dem der Radius 25 - wie im Stand der Technik üblich - so bemessen ist, dass die Übertragungseinrichtung im Inneren des Schwingengehäuses 13 unter Ausbildung eines keilförmigen Abschnitts vollständig überdeckt ist. Durch die Schaffung des Abdeckbereichs 23 wird ein freier, nicht abgedeckter Bereich 26 zwischen der Schneidkante 27 des Kreismessers 11 und der teilkreisförmigen Außenkante 28 des Schwingengehäuses 13 im Abdeckbereich 23 stark reduziert. Dies wiederum führt zu einer deutlich verminderten Reibung zwischen dem schnell rotierenden Kreismesser 11 und der gerade entstehenden Brotscheibe, sodass auch die Kraftwirkungen auf die Scheibe und die Gefahr einer Beschädigung derselben minimiert werden.With view on Figures 6a and 6c it is clear that the rocker housing 13 deliberately has a significantly larger radius 24 in an annular cover area 23 than in an adjoining area in which the radius 25 - as is customary in the prior art - is dimensioned such that the transmission device inside the Swingarm housing 13 is completely covered to form a wedge-shaped section. By creating the cover area 23 , a free, not covered area 26 between the cutting edge 27 of the circular knife 11 and the part-circular outer edge 28 of the rocker housing 13 in the cover area 23 is greatly reduced. This in turn leads to a significantly reduced friction between the rapidly rotating circular knife 11 and the bread slice that is just being formed, so that the force effects on the slice and the risk of damage to the same are also minimized.

Anders herum ausgedrückt ist ein radial gemessener Abstand 36 zwischen der Kante 28 des Schwingengehäuses 13 im Abdeckbereich 23 und der Schneidkante 27 des Kreismessers 11 in dem Abdeckbereich 23 kleiner als eine Differenz zwischen einem Radius 30 des Kreismessers 11 und einer minimalen halben Breite 31 des Schwingengehäuses 13 innerhalb eines Überlappungsbereichs des Schwingengehäuses 13 mit dem Kreismesser 11. Eigentlich bestünde nämlich nach der Vorgehensweise gemäß dem Stand der Technik keine Notwendigkeit, das Schwingengehäuse 13 über das durch die Schwingenbreite definierte Maß hinaus zu vergrößern. Was sich in Bezug auf die Reibungsminimierung und Verbesserung der Schneidqualität jedoch als äußerst wirksam erwiesen hat.In other words, a radially measured distance 36 between the edge 28 of the rocker housing 13 in the cover area 23 and the cutting edge 27 of the circular knife 11 in the cover area 23 is smaller than a difference between a radius 30 of the circular knife 11 and a minimum half width 31 of the rocker housing 13 within an overlap area of the rocker housing 13 with the circular knife 11. Actually, according to the procedure according to the prior art, there would be no need to enlarge the rocker housing 13 beyond the extent defined by the rocker width. However, this has proven to be extremely effective in terms of minimizing friction and improving the cutting quality.

Aus Figur 6a lässt sich entnehmen, dass sich der ungefähr hammerkopfförmige Abdeckbereich 23 über einen Winkelbereich 32 von etwa 140° erstreckt. Ein Kernbereich des Abdeckbereichs 23, in dem der Radius 24 sein größtes Maß besitzt und konstant ist, erstreckt sich über einen Winkelbereich 33 von etwa 90°. Eine Mittelachse 34 des Abdeckbereichs 23 verläuft unter einem Winkel zu einer Längsachse 35 der Schwinge 9, die die beiden Drehachsen 8, 10 miteinander verbindet. Der Winkel beträgt hier rund 130°. Im vorliegenden Fall beträgt der Abstand 36 zwischen dem Radius 30 des Kreismessers 11 und dem Radius 24 im Abdeckbereich 23 etwa 14 mm.Out Figure 6a it can be seen that the roughly hammer-shaped cover area 23 extends over an angular area 32 of approximately 140 °. A core region of the covering region 23 , in which the radius 24 has its largest dimension and is constant, extends over an angular region 33 of approximately 90 °. A central axis 34 of the cover area 23 extends at an angle to a longitudinal axis 35 of the rocker 9 , which connects the two axes of rotation 8, 10 to one another. The angle here is around 130 °. In the present case, the distance 36 between the radius 30 of the circular knife 11 and the radius 24 in the covering area 23 is approximately 14 mm.

Aus den Figuren 11 bis 13 , die unterschiedliche perspektivische Abbildungen der Schwinge 9 zeigen, lässt sich entnehmen, dass zwischen dem Boden 4 des Einlegebereichs 2 und einem Boden 37 des Entnahmebereichs 5 ein Schneidspalt 38 ausgebildet ist, durch den sowohl die Schwinge 9 mit ihrem Schwingengehäuse 13 als auch das Kreismesser 11 hindurch treten. Während das Kreismesser 11 sich in sehr kleinem Abstand zu einer Vorderkante 39 des Bodens 4 des Einlegebereichs 2 befindet, sodass die Vorderkante 39 als Gegenschneide dient, ist der Abstand zu einer Vorderkante 40 des Bodens 37 des Entnahmebereichs 5 aufgrund des Schneidspaltes 38 sehr viel größer.From the Figures 11 to 13 , which show different perspective images of the rocker 9 , it can be seen that a cutting gap 38 is formed between the bottom 4 of the insertion area 2 and a bottom 37 of the removal area 5 , through which both the rocker 9 with its rocker housing 13 and the circular knife 11 step through. While the circular knife 11 is at a very short distance from a front edge 39 of the bottom 4 of the insertion area 2 , so that the front edge 39 serves as a counter-cutting edge, the distance from a front edge 40 of the bottom 37 of the removal area 5 is very much larger due to the cutting gap 38 .

Um die Gefahr zu eliminieren, dass in den Spaltbereich 38 während des Abschneidens einer Scheibe oder unmittelbar danach eine Scheibe aufgrund der Rotation des Kreismessers 11, dessen Drehrichtung durch einen Pfeil 41 veranschaulicht ist, hineingezogen wird, ist der Schneidspalt 38 ausgehend von dem Boden 37 des Entnahmebereichs 5 mittels eines Stützelements 42 verschlossen. Das Stützelement 42 besitzt die Gestalt einer sich über die gesamte Breite des Entnahmebereichs 5 (und sogar darüber hinaus) erstreckenden Leiste aus einem lebensmittelechten, elastischen Kunststoffmaterial und ist auf eine später noch näher erläuterte Weise an der Unterseite des Bodens 37 des Entnahmebereichs 5 befestigt.In order to eliminate the risk that a disc is drawn into the gap region 38 during the cutting off of a disc or immediately thereafter due to the rotation of the circular knife 11 , the direction of rotation of which is illustrated by an arrow 41 , the cutting gap 38 is starting from the bottom 37 of the Removal area 5 closed by means of a support element 42 . The support element 42 has the shape of a strip made of a food-safe, elastic plastic material that extends over the entire width of the removal area 5 (and even beyond) and is fastened to the underside of the bottom 37 of the removal area 5 in a manner which will be explained in more detail later.

Aus den Figuren 11 bis 13 ist erkennbar, dass das Stützelement 42 einen solchen Abstand von der Vorderkante 39 des Bodens 4 des Einlegebereichs 2 besitzt, dass es auch in geradlinig gestrecktem Zustand einen hinreichenden Freiraum für das Kreismesser 11 belässt. Zu einer Kollision zwischen Kreismesser 11 und Stützelement 42 kann es daher unter keinen Umständen kommen. Hingegen ist die Dicke 20 des Schwingengehäuses 13 in dem Bereich 18 mit reduzierter Dicke (siehe Figuren 6b und 6c ) größer als der verbleibende Freiraum zwischen dem Stützelement 42 und der Vorderkante 39 des Bodens 4 des Einlegebereichs 2. Aus diesem Grunde verformt sich das Stützelement 42 durch das Schwingengehäuse 13 in diesem Abschnitt 18, der nach rechts und links angrenzend jeweils in einem keilförmigen Bereich 43, 44 ausläuft, entsprechend der Schwingenbewegung in dem Schneidspalt 38. In dem Abschnitt 18, in dem die Dicke somit größer als zu den Rändern des Schwingengehäuses 13 ist, ist die elastische Verformung des Stützelements 42 maximal. Dort kommt es zu einer ungefähr vertikalen Aufwölbung des freien Randes des Stützelements 42, der folglich an dieser Stelle ungefähr einen rechten Winkel mit dem Boden 37 des Entnahmebereichs 5 einschließt. Aufgrund der oszillierenden Bewegung der Schwinge 9 bewegt sich der wie vorstehend beschriebene verformte Bereich des Stützelements 32 fortlaufend entlang der Länge des Stützelements 42 von dessen einem Ende zu dessen anderem Ende. In den Figuren 11 bis 13 ist eine Mittelstellung der Schwinge 9 dargestellt, in der das Kreismesser 11 einen Abstand sowohl von einer Seitenwand 45 als auch einer Seitenwand 46 jeweils des Einlegebereichs 2 besitzt. Die wulstförmige Aufwölbung des als eine Art Verschlusslippe dienenden Stützelements 42 wandert somit fortlaufend entlang der Breite des Entnahmebereichs 5 hin und her.From the Figures 11 to 13 It can be seen that the support element 42 is at such a distance from the front edge 39 of the bottom 4 of the insertion area 2 that it leaves sufficient space for the circular knife 11 even in a straight, straight state. A collision between the circular knife 11 and the support element 42 can therefore never occur. In contrast, the thickness 20 of the rocker housing 13 in the area 18 with reduced thickness (see Figures 6b and 6c ) greater than the remaining free space between the support element 42 and the front edge 39 of the bottom 4 of the insertion area 2 . For this reason, the support element 42 is deformed by the rocker housing 13 in this section 18 , which ends to the right and left in a wedge-shaped region 43, 44 , corresponding to the rocker movement in the cutting gap 38 . In section 18 , in which the thickness is thus greater than at the edges of the rocker housing 13 , the elastic deformation of the support element 42 is at a maximum. There is an approximately vertical bulging of the free edge of the support element 42 , which consequently at this point encloses approximately a right angle with the bottom 37 of the removal area 5 . Due to the oscillating movement of the rocker 9 , the deformed region of the support element 32 as described above moves continuously along the length of the support element 42 from one end to the other end thereof. In the Figures 11 to 13 A center position of the rocker 9 is shown, in which the circular knife 11 is at a distance from both a side wall 45 and a side wall 46 of the insertion area 2 . The bead-shaped bulge of the support element 42 , which serves as a kind of sealing lip, thus continuously moves back and forth along the width of the removal area 5 .

In den unverformten, ungefähr parallel zu dem Boden 37 des Entnahmebereichs ausgerichteten Abschnitten des Stützelements befindet sich dieses in einer Stützstellung, in der es verhindert, das gerade im Entstehen begriffene Scheiben in einen unterhalb des Stützelements 42 befindlichen Maschineninnenraum gelangen können. Ausgehend von dieser Stützstellung wird das Stützelement 42 durch die Schwinge 9, und zwar durch den reibenden Kontakt mit der Oberfläche des Schwingengehäuses 13 und die dadurch hervorgerufenen Normalkräfte, in eine Freigabestellung verdrängt, sodass die Schwinge 9 ihre oszillierende Bewegung ausführen kann. In der Freigabestellung ist das Stützelement 42 auf Biegung beansprucht und elastisch vorgespannt, sodass es im Zuge einer fortgesetzten Bewegung der Schwinge 9 selbsttätig wieder in die Stützstellung zurückkehrt, sobald der zuvor von dem Schwingengehäuse 13 eingenommene Raum im Schneidspalt 38 an der entsprechenden Stelle wieder freigegeben wurde.In the undeformed sections of the support element which are aligned approximately parallel to the base 37 of the removal region, the support element is in a support position in which it prevents the disks which are being created from reaching a machine interior located below the support element 42 . Starting from this support position, the support element 42 is displaced into a release position by the rocker 9 , namely through the frictional contact with the surface of the rocker housing 13 and the normal forces caused thereby, so that the rocker 9 can execute its oscillating movement. In the release position, the support element 42 is subjected to bending and is elastically pretensioned, so that it automatically returns to the support position in the course of a continuous movement of the rocker 9 as soon as the space previously occupied by the rocker housing 13 in the cutting gap 38 has been released again at the corresponding point ,

Figur 7 zeigt noch in einer Detailansicht, dass sich die Schwinge 9 mit dem Überlappungsbereich 23 zu einem geringen vorderen Teil in einen Spalt zwischen der Seitenwand 45 des Einlegebereichs 2 und einer gegenüber liegenden Seitenwand 47 des Entnahmebereichs 5 hinein erstreckt. Dasselbe gilt selbstverständlich für die Schneidkante 27 des Kreismessers 11, die um einen geringen Betrag radial weiter nach außen vorsteht. Auf diese Weise ist sichergestellt, dass auch in einem Eckbereich 48 des Einlegebereichs 2 ein optimales Abschneiden der Scheiben im Sinne eines vollständigen und sauberen Abtrennens von dem verbleibenden Brotlaib sichergestellt ist. Der Überlappungsbereich 23 des Schwingengehäuses 13 erstreckt sich auch mit einem kleinen Teil unterhalb des Bodens 4 des Einlegebereichs 2, sodass auch bei einem Schneiden in dem Eckbereich 48 eine sehr weit reichende Überdeckung des dort maßgeblichen Sektors der Seitenfläche des Kreismessers 11 gegeben ist, selbst unter Berücksichtigung eines gewissen Höhenversatzes zwischen dem Boden 4 des Einlegebereichs 2 und dem Boden 37 des Entnahmebereichs 5 (siehe insbesondere in Figur 11 ). Aus Figur 11 ist auch zu entnehmen, dass das Schwingegehäuse 13 bei seiner oszillierenden Bewegung durch den Schneidspalt 38 lediglich mit seinem Abschnitt 18 mit (gegenüber dem Verdickungsbereich 14) reduzierter Dicke mit dem Stützelement 42 interagiert. Figure 7 shows in a detailed view that the rocker 9 with the overlap area 23 extends to a small front part into a gap between the side wall 45 of the insertion area 2 and an opposite side wall 47 of the removal area 5 . The same naturally applies to the cutting edge 27 of the circular knife 11, which projects radially further outwards by a small amount. This ensures that even in a corner area 48 of the insertion area 2 an optimal cutting of the slices is ensured in the sense of a complete and clean separation from the remaining loaf of bread. The overlap area 23 of the rocker housing 13 also extends with a small part below the bottom 4 of the insertion area 2 , so that even when cutting in the corner area 48 there is very extensive coverage of the sector of the side face of the circular knife 11 that is relevant there, even taking into account a certain height offset between the bottom 4 of the insertion area 2 and the bottom 37 of the removal area 5 (see in particular in Figure 11 ) . Out Figure 11 it can also be seen that during its oscillating movement through the cutting gap 38 , the oscillating housing 13 only interacts with its section 18 with a reduced thickness (compared to the thickening region 14 ) with the support element 42 .

Die Befestigung des Stützelements 42 ergibt sich aus den Figuren 8 bis 10 : Es ist ersichtlich, dass der Boden 37 des Entnahmebereichs 5 in einem Endabschnitt 49 leicht nach oben abgewinkelt ist. Unterhalb des Bodens 37 befindet sich ein Verbindungsabschnitt 50 des Stützelements 42, der mittels einer Klemmleiste 51 sowie Schrauben 52 (die mit nicht sichtbaren Schweißmuttern auf der Unterseite des Bodens 37 zusammenwirken) klemmend befestigt ist. Ein Kragabschnitt 53 des Stützelements 42 ragt über eine Vorderkante 55 des abgewinkelten Endabschnitts 49 des Bodens 37 sowie über eine Vorderkante 54 der Klemmleiste 51 vor und befindet sich somit in dem Schneidspalt 38. Die metallische Klemmleiste 51 ist entsprechend dem Boden 37 leicht abgewinkelt und überlappt auch dessen Endabschnitt 49, sodass der Verbindungsabschnitt 50 eine entsprechend abgewinkelte Form annimmt. Durch die von unten in den Schneidspalt 38 eingesetzte Schwinge 9 wird der Kragabschnitt 53 verformt, wobei er sich bis hin zu einer nahezu senkrechten Ausrichtung seines Randes elastisch verformt. Aus Figur 9 ist wiederum der Höhenversatz 56 zwischen dem Boden 4 des Einlegebereichs 2 und dem Boden 37 des Entnahmebereichs 5 ersichtlich.The attachment of the support element 42 results from the Figures 8 to 10 : It can be seen that the bottom 37 of the removal area 5 is slightly angled upward in an end section 49 . Below the base 37 is a connecting section 50 of the support element 42 , which is clamped by means of a clamping bar 51 and screws 52 (which interact with invisible weld nuts on the underside of the base 37 ). A cantilever section 53 of the support element 42 projects over a front edge 55 of the angled end section 49 of the base 37 and over a front edge 54 of the clamping strip 51 and is therefore located in the cutting gap 38 . The metallic terminal block 51 is slightly angled in accordance with the bottom 37 and also overlaps its end section 49 , so that the connecting section 50 assumes a correspondingly angled shape. The cantilever section 53 is deformed by the rocker 9 inserted into the cutting gap 38 from below, whereby it deforms elastically up to an almost vertical alignment of its edge. Out Figure 9 the height offset 56 between the bottom 4 of the insertion area 2 and the bottom 37 of the removal area 5 can again be seen.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Vorrichtungcontraption
22
Einlegebereichloading area
33
Vorschubeinrichtungfeeder
44
Bodenground
55
Entnahmebereichremoval area
66
Vorschubrichtungfeed direction
77
Schneideinrichtungcutter
88th
erste Drehachsefirst axis of rotation
99
Schwingewing
1010
zweite Drehachsesecond axis of rotation
1111
Kreismessercircular blade
1212
Antriebseinrichtungdriving means
1313
Schwingengehäuseswing housing
1414
Verdickungsbereichthickening area
1515
Dickethickness
15'15 '
Spitzetop
1616
keilförmiger Abschnittwedge-shaped section
1717
Ãœbergangcrossing
1818
Abschnittsection
1919
Abstanddistance
2020
Dickethickness
2121
Linieline
2222
Freiraumfree space
2323
Abdeckbereichcoverage
2424
Radiusradius
2525
Radiusradius
2626
BereichArea
2727
Schneidkantecutting edge
2828
Außenkanteouter edge
2929
Abstanddistance
3030
Radiusradius
3131
Breitewidth
3232
Winkelbereichangle range
3333
Winkelbereichangle range
3434
Mittelachsecentral axis
3535
Längsachselongitudinal axis
3636
Abstanddistance
3737
Bodenground
3838
Schneidspaltcutting gap
3939
Vorderkanteleading edge
4040
Vorderkanteleading edge
4141
Pfeilarrow
4242
Stützelementsupport element
4343
BereichArea
4444
BereichArea
4545
SeitenwandSide wall
4646
SeitenwandSide wall
4747
SeitenwandSide wall
4848
Eckbereichcorner
4949
Endabschnittend
5050
Verbindungsabschnittconnecting portion
5151
Klemmleisteterminal block
5252
Schraubescrew
5353
Kragabschnittcollar portion
5454
Vorderkanteleading edge
5555
Vorderkanteleading edge
5656
Höhenversatzheight offset
αα
Winkelangle
ββ
Winkelangle

Claims (5)

  1. Device (1) for cutting bread into slices with
    a) an insertion area (2) into which a loaf of bread can be inserted,
    b) a cutting device (7) comprising a swing arm (9) rotatable about a first axis of rotation(8) and a circular knife (11) which is borne on the swing arm in a rotating manner about as second axis of rotation (10), wherein the second axis of rotation (10) moves within a cutting cross-section,
    c) an advancing device (3) with which the loaf of bread situated in the insertion area (2) can be advanced towards the cutting device (7) so that at the front end of the load of bread successive slices can be cut from this by way of the cutting device (7),
    d) a removal area (5) in which the cut slices can be picked up,
    e) a transmission device arranged in an interior space of the swing arm housing (13) for driving the circular blade (11), wherein at an end facing away from the first axis of rotation (8) the swing arm housing (13) terminates in a wedge-shaped manner in a longitudinal section orientated perpendicularly to a plane of the circular knife (11).
    characterised in that
    f) in a thickened area (14), in which the swing arm housing (13) and the circular knife (11) overlap, a thickness (15) of the swing arm housing (13) measured perpendicularly to the plane of the circular knife (11) is greater than 20 mm and
    g) in a longitudinal section (13), the contour of which initially has a wedge-shaped section (16), then in the thickened area (14) has a section with a maximum constant thickness (15) and then a section (18) with reduced thickness (20).
  2. Device according to claim 1 characterised in that a wedge angle α of the, in longitudinal section, wedge-shaped end of the swing arm housing (13) is between 10° and 30°, preferably between 15° and 25°.
  3. Device according to claim 1 or 2 characterised in that the section (18) of reduced thickness extents to the first axis of rotation (8), wherein preferably the maximum thickness (15) in the thickened area (14) is least 120 %, preferably 140 % of the thickness (20) in the area (18) of reduced thickness (20).
  4. Device according to claim 3 characterised in that a transition (17) between the section of maximum thickness (15) and the section (18) of reduced thickness (20) is arranged between the second axis of rotation (10) and the section, facing the first axis of rotation (8), of the cutting edge (27) of the circular knife (11), wherein preferably the transition (17) is at a distance (19) from the second axis or rotation (10) which is 25 % to 50 % of the radius (30) of the circular knife (11).
  5. Device according to any one of claims 1 to 4 characterised in that during the entire movement of the swing arm (9), the thickened area (14) is exclusively located above a cutting gap (38) between the insertion area (2) and the removal area (5).
EP13183653.8A 2012-09-14 2013-09-10 Device for cutting bread into slices Active EP2708336B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13183653T PL2708336T3 (en) 2012-09-14 2013-09-10 Device for cutting bread into slices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012216379.4A DE102012216379A1 (en) 2012-09-14 2012-09-14 Device for slicing bread

Publications (2)

Publication Number Publication Date
EP2708336A1 EP2708336A1 (en) 2014-03-19
EP2708336B1 true EP2708336B1 (en) 2020-01-08

Family

ID=49118419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13183653.8A Active EP2708336B1 (en) 2012-09-14 2013-09-10 Device for cutting bread into slices

Country Status (3)

Country Link
EP (1) EP2708336B1 (en)
DE (1) DE102012216379A1 (en)
PL (1) PL2708336T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016010635B4 (en) 2016-09-05 2018-04-05 Mhs Schneidetechnik Gmbh Cutting machine for rope-shaped food

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706485A1 (en) 1987-02-27 1988-10-13 Fritz Schickart Slicing and cutting machine for bread, cheese and the like
DE19820004C2 (en) * 1998-05-06 2000-06-08 Uwe Reifenhaeuser Machine for cutting a strand of material into slices
DE19820492C1 (en) 1998-05-07 1999-08-12 Uwe Dipl Ing Reifenhaeuser Method of cutting bread string
DE10312301B4 (en) 2003-03-20 2006-08-03 Reifenhäuser, Uwe, Dipl.-Ing. Slicer
DE102005062501B4 (en) * 2005-12-16 2009-10-22 Bizerba Gmbh & Co. Kg The food product slicer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2708336A1 (en) 2014-03-19
DE102012216379A1 (en) 2014-03-20
PL2708336T3 (en) 2020-09-21

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