EP2708336B1 - Dispositif permettant de couper du pain en tranches - Google Patents

Dispositif permettant de couper du pain en tranches 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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EP
European Patent Office
Prior art keywords
area
section
cutting
rotation
thickness
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EP13183653.8A
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German (de)
English (en)
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EP2708336A1 (fr
Inventor
Uwe Reifenhäuser
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting 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
    • B26D1/01—Cutting 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
    • B26D1/12—Cutting 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
    • B26D1/14—Cutting 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
    • B26D1/157—Cutting 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
    • B26D1/16—Cutting 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • B26D2210/06—Machines 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.

Landscapes

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

Claims (5)

  1. Dispositif (1), destiné à couper du pain en tranches, comprenant
    a) une zone de dépose (2), dans laquelle peut être déposée une miche de pain,
    b) un système de coupe (7), qui comporte un bras oscillant (9) rotatif autour d'un premier axe de rotation (8) et un couteau circulaire (11) logé sur le bras oscillant en étant rotatif autour d'un deuxième axe de rotation (10), le deuxième axe de rotation (10) se déplaçant à l'intérieur d'une section transversale de coupe,
    c) un système d'avance (3), à l'aide duquel une miche de pain se trouvant dans la zone de dépose (2) peut être avancée sur le système de coupe (7), de telle sorte que sur une extrémité antérieure de la miche de pain, des tranches puissent être successivement coupées de celle-ci au moyen du système de coupe (7),
    d) une zone de retrait (5), dans laquelle on peut prélever les tranches coupées,
    e) un système de transmission, placé dans l'espace intérieur d'un carter de bras oscillant (13), destiné à entraîner le couteau circulaire (11), le carter de bras oscillant (13) se terminant de manière cunéiforme sur une extrémité opposée au premier axe de rotation (8), dans une coupe longitudinale orientée à la perpendiculaire d'un plan du couteau circulaire (11),
    caractérisé en ce que
    f) dans une zone d'épaississement (14), dans laquelle le carter de bras oscillant (13) et le couteau circulaire (11) se chevauchent, une épaisseur (15) du carter de bras oscillant (13) mesurée à la perpendiculaire du plan du couteau circulaire (11) est supérieure à 20 mm et
    g) dans une coupe longitudinale du carter de bras oscillant (13), le contour de celui-ci dispose d'abord d'un segment cunéiforme (16), ensuite, dans la zone d'épaississement (14) d'un segment d'épaisseur (15) maximale constante, et dans la suite d'un segment (18) d'épaisseur (20) réduite.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un angle cunéiforme α de l'extrémité cunéiforme dans la direction longitudinale du carter de bras oscillant (13) est compris entre 10° et 30°, de préférence entre 15° et 25°.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le segment (18) d'épaisseur réduite s'étend jusqu'au premier axe de rotation (8), de préférence l'épaisseur (15) maximale dans la zone d'épaississement (14) correspondant à au moins 120 %, de préférence à au moins 140 % de l'épaisseur (20) dans la zone (18) d'épaisseur (20) réduite.
  4. Dispositif selon la revendication 3, caractérisé en ce qu'un passage (17) entre le segment d'épaisseur (15) maximale vers le segment (18) d'épaisseur (20) réduite est placé entre le deuxième axe de rotation (10) et le segment de l'arête de coupe (27) du couteau circulaire (11) qui fait face au premier axe de rotation (8), de préférence, le passage (17) présentant un écart (19) par rapport au deuxième axe de rotation (10) qui s'élève à de 25 % à 50 % du rayon (30) du couteau circulaire (11).
  5. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que sur l'ensemble du déplacement du bras oscillant (9), la zone d'épaississement (14) se trouve exclusivement au-dessus d'une fente de coupe (38) entre la zone de dépose (2) et la zone de retrait (5).
EP13183653.8A 2012-09-14 2013-09-10 Dispositif permettant de couper du pain en tranches Active EP2708336B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13183653T PL2708336T3 (pl) 2012-09-14 2013-09-10 Urządzenie do cięcia chleba na kromki

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012216379.4A DE102012216379A1 (de) 2012-09-14 2012-09-14 Vorrichtung zum Schneiden von Brot in Scheiben

Publications (2)

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

Family

ID=49118419

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13183653.8A Active EP2708336B1 (fr) 2012-09-14 2013-09-10 Dispositif permettant de couper du pain en tranches

Country Status (3)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016010635B4 (de) 2016-09-05 2018-04-05 Mhs Schneidetechnik Gmbh Schneidmaschine für strangförmige Lebensmittel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706485A1 (de) 1987-02-27 1988-10-13 Fritz Schickart Scheibenschneid- und teilmaschine fuer brot, kaese und dgl.
DE19820004C2 (de) * 1998-05-06 2000-06-08 Uwe Reifenhaeuser Maschine zum Schneiden eines Gutsstrangs in Scheiben
DE19820492C1 (de) 1998-05-07 1999-08-12 Uwe Dipl Ing Reifenhaeuser Verfahren und Vorrichtung zum Schneiden eines Gutsstrangs in Scheiben
DE10312301B4 (de) 2003-03-20 2006-08-03 Reifenhäuser, Uwe, Dipl.-Ing. Brotschneidemaschine
DE102005062501B4 (de) * 2005-12-16 2009-10-22 Bizerba Gmbh & Co. Kg Lebensmittelschneidemaschine

Non-Patent Citations (1)

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

Also Published As

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

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