EP0071298B1 - Dispositif d'affûtage pour machine à trancher - Google Patents

Dispositif d'affûtage pour machine à trancher Download PDF

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Publication number
EP0071298B1
EP0071298B1 EP82200915A EP82200915A EP0071298B1 EP 0071298 B1 EP0071298 B1 EP 0071298B1 EP 82200915 A EP82200915 A EP 82200915A EP 82200915 A EP82200915 A EP 82200915A EP 0071298 B1 EP0071298 B1 EP 0071298B1
Authority
EP
European Patent Office
Prior art keywords
sharpening
blade
shielding
knife
cutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82200915A
Other languages
German (de)
English (en)
Other versions
EP0071298A1 (fr
Inventor
I.R. R.T. Escher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maatschappij Van Berkels Patent BV
Original Assignee
Maatschappij Van Berkels Patent BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Maatschappij Van Berkels Patent BV filed Critical Maatschappij Van Berkels Patent BV
Publication of EP0071298A1 publication Critical patent/EP0071298A1/fr
Application granted granted Critical
Publication of EP0071298B1 publication Critical patent/EP0071298B1/fr
Expired legal-status Critical Current

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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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • B26D7/24—Safety devices specially adapted for cutting machines arranged to disable the operating means for the cutting member
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/12—Means for treating work or cutting member to facilitate cutting by sharpening the cutting member
    • 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
    • B26D1/143—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 stationary axis

Definitions

  • the present invention relates to' a sharpening unit which can be applied principally to slicing machines operating with a rotating circular cutter-knife and used for slicing foodstuff products.
  • slicing machines those driven manually or electrically, those with vertical or inclined cutter-knife and, in the versions used in the trade they are always provided with a sharpening unit for sharpening the cutter-knife blade if this is not sharp enough to slice the foodstuff product.
  • Said sharpening unit is incorporated in the slicing machine or separated from it; in this latter case, however, it is separated in such a way as to be able to be connected to one of the component parts of the slicing machine.
  • GB-A-525 920 and GB-A-532 298 disclose a slicing machine with incorporated sharpening unit comprising a pivot fixed to the slicing machine, on which pivot there is articulated a support structure for two wheels rotatably carried thereby.
  • the unit also comprises a lever element adapted to actuate the unit according to a preestablished sequence to cause the wheels to come to bear against the blade of the circular cutting-knife.
  • the support structure for the wheels is closed on its upper side by a blade-protection cover.
  • One of the wheels, for sharpening is used to remove material from the worn blade, while the other, flash-cleaning wheel is used to remove the flash formed on the blade by the former grinding or sharpening wheel.
  • the wheels are commonly arranged at opposite sides of the rotary cutting-knife.
  • the flash-cleaning wheel may be replaced by a wheel made of hardened material.
  • Dismantling the said wheels is, however, a troublesome operation calling for special tools; in some cases the units themselves have to be dismantled from the slicing machine and immersed wholesale in the solvent liquid for their grinding and flash-cleaning wheels to be cleaned.
  • the incorporated types of sharpening units have to be lifted, rotated through an angle ranging from 45° to 180°, depending on the model, and, finally, have to be pressed downwards before they can be brought into operating position.
  • GB-A-525 920 discloses a safety means which prevents actuation of the motor operating the rotary cutter blade when a cover part for the blade is removed.
  • These means comprise a microswitch operated by a train of balls arranged within a guide. The balls are compressed in the guide to close the microswitch for operating the motor when the cover parts are in the covering position, while when one of said cover parts is removed the balls are uncompressed in the guide and the microswitch opens the motor actuating circuit.
  • US-A-2 030 197 discloses a slicing machine having a sharpening unit comprising a sharpening wheel and a burnishing wheel each rotatably arranged on a respective pivotable arm.
  • the wheels are moved into operative and inoperative position by a knob which is either pushed or pulled to operate the respective wheel arm.
  • the wheels and the arms are arranged within a casing which can be opened by removal of a frontal guard plate which also covers most of the slicing cutter blade. Removal of the frontal guard plate allows cleaning of the sharpening and burnishing wheels without particular difficulty.
  • the conventional sharpening units of separate type differ from those of the incorporated type in that the support structure, and thus all that is connected to it (grinding and flash-removal wheels, lever element, etc.), has to be mounted on the slicing machine proximally to the cutter-knife blade before sharpening can be commenced, and has to be removed from the slicing machine when sharpening is concluded.
  • This mounting furthermore requires the shifting of the faceplate and other parts of the slicing machine which normally protect the cutter-blade from accidental contacts caused by the operator. This is very dangerous, and in certain countries with severe safety regulations it is prohibited to market such machines featuring such type of sharpening unit.
  • the object of the present invention is to obviate the said problems caused by the existing sharpening units, by providing a sharpening unit particularly for foodstuff slicing machines which is easy to operate and to clean and which is capable of satisfying severe safety regulations.
  • FIGURE 1 there is indicated by 10 a sharpening unit according to the invention mounted on a slicing machine 11 fitted with a rotating circular cutter-knife 12.
  • the unit 10 comprises a boxlike shield 13 rotatably and removably mounted to a fixed structure 14 of the slicing machine 11 in a position such as to overhang the cutter-knife 12 and to allow the blade 15 of the cutter-knife 12 to move within it.
  • the boxlike shield 13 has within and solid with it a bushing 16 which fits over a small vertical column 17 mounted rotatably on the fixed structure 14.
  • the mounting of this column is effected by engaging a cylindrical lower end portion 32 of the column 17 with a corresponding seating 33 of the fixed structure 14 (FIGURE 3).
  • the bushing 16 is adapted to be rotationally fixed to the column 17 by a dowel 26 which crosses the bushing 16 transversally and fits into a longitudinal groove 27 of the column 17 which runs to the upper end of said column 17 (FIGURE 2).
  • the bushing 16 can in this way slide longitudinally on the column 17 to the point of coming off it, but cannot rotate with respect to it.
  • a block 18 which supports a first sharpening tool in form of a grinding wheel 19 in a freely rotatable manner.
  • Two vertical pegs 20 and 21 solid with the wall 30 of the head of the boxlike shield 13 are provided for the mounting of the block 18. These pegs insert themselves respectively into a corresponding through-hole 22 and a corresponding dead hole 23, both formed in the block 18.
  • the free end of the peg 20 projects from the lower side of the block 18 when this has been mounted (FIGURE 4) and carries a groove on its circumference to receive the claws of a small spring 24 secured to the block 18 at 25 and adapted to retain the block 18 against the boxlike shield 13 (FIGURE 2).
  • the grinding wheel 19 is proximal to the blade 15 and is adapted to sharpen it.
  • a second, flash-removing tool in form of a small circular plate 28 made of hardened steel, disposed proximally to the blade 15 from the side opposed to the grinding wheel 19 and downstream of it (FIGURE 4).
  • the small plate 28 has a central hole to allow it to be placed over a T-pin 29 solid with a lateral wall 31 of the boxlike shield 13 and then restrained, with a downward movement, between the head of the pin 29 and the wall 31 (FIGURE 5).
  • a projection 34 of a lateral wall 35 of the boxlike shield is screwed a pin 36, transversal to the blade 15, which pin slides in a corresponding through-seating 37 of a small block 38 against a spring 39 wound about the pin 36.
  • the spring 39 is fixed in the seating 37, while the other end is fixed to the projection 34.
  • the small column 17 has within it a longitudinal cavity 41 which houses in slideable manner a small rod 42, which extends to the interior of the fixed structure 14through a guide hole 47 in the seating 33.
  • the small rod 42 is thrust downwards, when the bushing is fitted over the small column 17, by a longitudinal pin 43 screwed into the bushing 16.
  • the pin 43 presses on the upper end of the small rod 42 which with its lower end flexes downwards a small elastic lamina 44 restrained to a microswitch 46 fitted inside the fixed structure 14.
  • the small lamina 44 in turn, in its flexing movement, presses a pushbutton 45 of the microswitch 46.
  • the pin 43, the small rod 42, the lamina 44, the pushbutton 45 and the microswitch define pilot means for stopping the actuation of the cutter-knife 12.
  • the microswitch 46 forms part of an electrical safety circuit on the slicing machine: when the pushbutton 45 is depressed, the supply circuit of the drive group for the cutter-knife 12 is energized, and the said cutter-knife can be set in operation through a central switch controlled by the operator. When the pushbutton 45 is released, the supply circuit is deenergized and the drive group cannot in any way be started up.
  • the safety circuit, the supply circuit, the drive unit and the central switch which can be variously embodied by any person skilled in the art, are not illustrated.
  • the boxltke shield 13 To mount the boxltke shield 13 on the fixed structure 14 it is sufficient to slip the bushing 16 onto the small column 17, sliding the dowel 26 in the grooving 27, and to fit the block 38 onto the pin 40. When mounted in this way, the boxlike shield 13 can oscillate around the seating 33 against the spring 39.
  • the operator has to actuate the cutter-knife 12 and then bring pressure to bear in the direction of the arrow A (shown in FIGURES 1 and 5); in this way the grinding wheel 19 touches the blade 15 and can perform its known abrasive action on the blade.
  • the sharpening unit 10 described above offers various advantages.
  • the said sharpening unit 10 satisfies the severest safety regulations. For, when it is mounted on the machine it covers the portion of the blade 15 comprised between the blade-cover, not shown in the FIGURE, and the faceplate 49, thus preventing the blade 15 from being touched accidentally.
  • the boxlike shield 13 is removed, the small rod 42 is freed by the pressure exerted by the pin 43 and, as a consequence, the small lamina 44 rises and releases the pushbutton 45, and, as described previously, prevents the cutter-knife 12 from being actuated.
  • the shape of the boxlike shield 13 and its type of mounting on the slicing machine 11 can be of numberless kinds as dictated by the imagination of the person skilled in the art. The same applies in respect of the other parts of the sharpening unit 10.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (4)

1. Dispositif d'affûtage (10) pour une machine à trancher (11) fonctionnant avec un couteau (12) à lame circulaire rotative, caractérisé en ce qu'il comprend un élément (13) pour blinder et prote-1ger la lame (15) dudit couteau à lame (12), ledit élément (13) étant assemblé de façon rotative et démontable à une structure fixe (14) de ladite machine à trancher (11) adjacente.à ladite lame (15), des moyens (19, 28) pour affûter ladite lame. qui sont fixés de façon démontable à l'intérieur dudit élément de blindage et de protection (13), ces moyens comprenant un premier outil d'affu-3tage (19) et un second outil (28) enleveur de bavures qui sont disposés sur des côtés opposés, par rapport à ladite lame (15) et adjacents à celle-ci, ledit élément de bindage et de protection (13) étant mobile en rotation contre l'effet de moyens élastiques (39) entre une position dans laquelle ledit outil d'affûtage (19) est en contact avec la lame (15) et une position dans laquelle ledit second outil enleveur de bavures (28) est en contact avec la lame (15), et étant ajusté lorsqu'il est retiré de la machine à trancher (11) pour coopérer avec des moyens de commande (44,46) pour arrêter le fonctionnement du couteau à lame (12).
2. Dispositif d'affûtage (10) selon la revendication 1, caractérisé en ce que ledit premier outil est une roue d'affûtage circulaire (19) tournant dans ledit élément de blindage et de protection (13).
3. Dispositif d'affûtage (10) selon la revendication 1, caractérisé en ce que ledit deuxième outil est une petite plaque (28) faite de matière durcie ayant un orifice central pour l'adapter par encastrement sur une cheville en T (29) audit élément de blindage et de protection (13).
4. Dispositif d'affûtage (10) selon la revendication 1, caractérisé en ce que ledit élément de blindage et de protection (13) comprend une broche (43) apte à actionner, au moyen d'une tige (42) glissant dans un guide (47) de ladite structure fixe (14), un commutateur (44, 45, 46) pour le commander en vue d'exciter le circuit d'alimentation électrique d'une unité de commande dudit couteau à lame (12) quand l'élément de blindage et de protection (13) est monté sur la machine à trancher (11), et en désexcitant cette alimentation quand l'élément de blindage et de protection (13) est retiré de la machine à trancher (11).
EP82200915A 1981-07-31 1982-07-19 Dispositif d'affûtage pour machine à trancher Expired EP0071298B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT23321/81A IT1137776B (it) 1981-07-31 1981-07-31 Gruppo di affilatura,principalmente per macchine affettatrici di alimenti
IT2332181 1981-07-31

Publications (2)

Publication Number Publication Date
EP0071298A1 EP0071298A1 (fr) 1983-02-09
EP0071298B1 true EP0071298B1 (fr) 1986-01-22

Family

ID=11206042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200915A Expired EP0071298B1 (fr) 1981-07-31 1982-07-19 Dispositif d'affûtage pour machine à trancher

Country Status (3)

Country Link
EP (1) EP0071298B1 (fr)
DE (1) DE3268661D1 (fr)
IT (1) IT1137776B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0635341A1 (fr) * 1993-07-15 1995-01-25 Gec Avery Limited Dispositif de sécurité pour une machine électrique à découper en tranches
JP5586401B2 (ja) * 2010-09-28 2014-09-10 京セラ株式会社 切断刃およびその製造方法並びにスリッティング工具

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030197A (en) * 1934-01-15 1936-02-11 American Slicing Machine Co Slicing machine
CH184285A (de) * 1935-08-22 1936-05-31 Mueller & Cie Aktiengesellscha Fleischschneidemaschine.
GB525920A (en) * 1939-03-03 1940-09-06 Berkel & Parnall Mach Mfg Co Improvements relating to knife guards and sharpening arrangements for slicing machines
GB532298A (en) * 1939-08-25 1941-01-21 Berkel Patent Nv Improvements relating to slicing machines
US4226373A (en) * 1979-03-05 1980-10-07 Wilson Research & Development, Inc. Feed tube protector for a food processor

Also Published As

Publication number Publication date
DE3268661D1 (en) 1986-03-06
IT8123321A0 (it) 1981-07-31
EP0071298A1 (fr) 1983-02-09
IT1137776B (it) 1986-09-10

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