EP0598285B1 - Stossmesser-Zuschneidemaschine - Google Patents

Stossmesser-Zuschneidemaschine Download PDF

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Publication number
EP0598285B1
EP0598285B1 EP93117861A EP93117861A EP0598285B1 EP 0598285 B1 EP0598285 B1 EP 0598285B1 EP 93117861 A EP93117861 A EP 93117861A EP 93117861 A EP93117861 A EP 93117861A EP 0598285 B1 EP0598285 B1 EP 0598285B1
Authority
EP
European Patent Office
Prior art keywords
knife
cutting machine
cutting
protective
machine according
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 - Lifetime
Application number
EP93117861A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0598285A1 (de
Inventor
Klaus Steinhauser
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.)
W Steinhauser & Co KG Maschinenfabrik GmbH
Original Assignee
W Steinhauser & Co KG Maschinenfabrik GmbH
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 W Steinhauser & Co KG Maschinenfabrik GmbH filed Critical W Steinhauser & Co KG Maschinenfabrik GmbH
Publication of EP0598285A1 publication Critical patent/EP0598285A1/de
Application granted granted Critical
Publication of EP0598285B1 publication Critical patent/EP0598285B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/3806—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface
    • B26F1/3813—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work
    • B26F1/382—Cutting-out; Stamping-out wherein relative movements of tool head and work during cutting have a component tangential to the work surface wherein the tool head is moved in a plane parallel to the work in a coordinate system fixed with respect to the work wherein the cutting member reciprocates in, or substantially in, a direction parallel to the cutting edge

Definitions

  • the invention relates to a butt knife cutting machine according to the preamble of claim 1.
  • DE 26 19 789 B2 which forms the preamble of claim 1, has disclosed a butt knife cutting device for processing flat material, ie for cutting several layers of fabric placed on a table-top-like base, which has a knife protection device for covering the butt knife cutting edge.
  • a knife protection device for covering the butt knife cutting edge.
  • this knife guard can be, for example, in the form of a U-shaped view from above Plastic glass hood exist, which surrounds the knife in a U-shape.
  • Such plexiglass covers have the disadvantage that they obstruct the view of the cutting point due to the constant dust and a parallax shift.
  • a dusty plexiglass cover which is inevitably necessary, there is also a risk of injury by reaching between the knife and the inside of the cover.
  • retracting the machine after the cut is no longer possible due to the falling covering, ie the machine must be lifted over the fabric layer or moved around the cutting table.
  • Such a plexiglass cover also has the disadvantage that the manual holding of the fabric layer by the user in the immediate vicinity of the cutting is no longer possible, since this space is covered by the plexiglass cover. This results in cut inaccuracies which should be avoided by lifting up the protective device, but protection is no longer guaranteed.
  • the known device proposes a band-shaped protective device which runs to the side of the knife-edge, which is connected in its lower region to the hold-down device of the knife protective device which can be moved up and down and whose flexible band is added in the upper region whose upward movement is rolling up, for example.
  • the impact knife is made visible.
  • Such a knife guard is arranged below the grinding device so that there is no mutual hindrance in the up and down movement of both the grinding device and the hold-down device.
  • a disadvantage of this device is the complex mechanism for guiding the side masking tapes.
  • the known device proposes to arrange a telescopic rod as knife protection instead of the band-shaped measuring protection device in front of or next to the knife edge.
  • a rigid rod can also be used as knife protection, which penetrates the grinding device provided.
  • arranging such a single bar in front of or next to the butt knife cutting edge cannot provide effective protection against finger contact with the cutting edge.
  • the free visibility of the knife edge is impaired by a protective rod arranged in front of it.
  • the cutting machine according to the invention is therefore based on the object of providing a simple and effective protective device against contact of the butt knife cutting edge, on the one hand there being no visual obstruction during the cutting process and on the other hand the grinding device for sharpening the butt knife cutting edge remains fully effective.
  • the butt knife cutting device has the advantage over the known devices that there are no obstructions in the form of plexiglass panes or band knife covers. Rather, effective protection against contact of the butt knife cutting edge is achieved in that, in particular, two protective rods are arranged at a short distance in front of the butt knife cutting edge, which surround the cutting edge of the butt knife so closely that contact with the cutting edge is prevented.
  • the lower part of the protective rods is connected to the hold-down device or the presser foot, which is pushed upwards depending on the height of the fabric layer. When the hold-down device is pushed up, the protective rods also move upwards and are guided on the machine housing and in particular in the connecting rod housing.
  • the basic structure of the butt knife cutting machine 1 shown in FIG. 1 corresponds to that of a machine such as that shown and described in DE 26 19 789 B2.
  • a machine has a machine housing 2 with an electric drive for an upward and downward moving thrust knife 3.
  • a flywheel 5 with an eccentric bolt 6 is provided on the motor shaft 4, on which a connecting rod 7 with a bearing 8 is mounted.
  • the lower end of the connecting rod 7 is connected to the butt knife end 9 via a bearing 10.
  • the above known drive is shown only schematically in the drawing.
  • the butt knife cutting machine 1 has in its lower region a base plate 11 which is connected to the machine housing 2 via a U-shaped support bracket 12.
  • a bow-shaped hold-down 13 is attached to a vertical rod 14 which is guided up and down on the machine housing 2.
  • the machine housing contains a braking device, not shown, for the rod 14, which can be released by operating an operating lever, so that the hold-down 13 falls down under its own weight.
  • FIG. 1 also shows a knife grinding device 15, which consists of two V-shaped grinding belts 16, 17 aligned with one another.
  • the deflection rollers for the belts of the knife grinding device are driven by the rotary knife drive, the grinding device is lowered along the butt knife and raised again to sharpen its cutting edge 18.
  • the knife sharpening device is guided via a guide rod 19.
  • a knife protection device 20 in front of the butt knife 3, which consists of two protective bars 21, 22 arranged directly in front of the cutting edge 18.
  • These protective rods 21, 22 are each inserted into a sleeve 23 in their lower region and clamped by means of a screw 24.
  • the sleeve 23 is fastened on the hold-down device 13.
  • the protective rods 21, 22 therefore perform the upward and downward movement of the hold-down device 13 with the vertical rod 14.
  • the respective protective rod 21, 22 is guided in a guide sleeve 25 on the machine housing 2 and protrudes along the dashed line 26 shown in FIG. 1 into the connecting rod housing 27 of the cutting machine, in particular in the uppermost position.
  • the two protective rods 21, 22 penetrate the two grinding belt arms 16, 17 in a respective bore 28, so that both the knife grinding device 15 and the hold-down device 13, 14 with protective rods 21, 22 can be moved up and down independently of one another. If the protective rods 21, 22 protruding into the connecting rod housing 27 during its upward movement come too closely to the thrust knife drive and in particular to the connecting rod 7, an increase in the distance can be achieved by means of spacer sleeves between connecting rod housing 27 (housing cover) and machine housing 2 with an additional sealing ring. These measures can also be used to equip older machines with appropriate protective bars.
  • the connecting plane 30 of the two protective bars 21, 22 is at a distance s 1 in front of the “tip” 18 ′ of the cutting edge 18 of the butt knife 3.
  • This distance s 1 is advantageously s 1 8 8 mm, so that touching the front cutting edge 18 'is no longer possible.
  • "s 1 " can also be the direct distance of the respective rod 21, 22 from the knife tip 18 ', the "tip"18' in FIG. 2 being the "front cutting edge".
  • the lateral distance s 2 of the two protective bars 21, 22 is also kept very small and is also s 2 8 8 mm. This ensures that the front cutting tip 18 'of the cutting edge 18 cannot be touched manually due to the two protective bars 21, 22.
  • a regulation of the German professional association states that adequate protection against sharp edges against contact is guaranteed with a gap width of ⁇ 8 mm, ie the gap width s 1 , s 2 formed by the protective rods must be significantly smaller than the finger width.
  • the invention is not restricted to the exemplary embodiment shown and described. Rather, it also encompasses all professional developments and improvements within the framework of the inventive idea.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Harvester Elements (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Nonmetal Cutting Devices (AREA)
EP93117861A 1992-11-05 1993-11-04 Stossmesser-Zuschneidemaschine Expired - Lifetime EP0598285B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4237351A DE4237351A1 (enrdf_load_stackoverflow) 1992-11-05 1992-11-05
DE4237351 1992-11-05

Publications (2)

Publication Number Publication Date
EP0598285A1 EP0598285A1 (de) 1994-05-25
EP0598285B1 true EP0598285B1 (de) 1997-09-10

Family

ID=6472161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93117861A Expired - Lifetime EP0598285B1 (de) 1992-11-05 1993-11-04 Stossmesser-Zuschneidemaschine

Country Status (3)

Country Link
EP (1) EP0598285B1 (enrdf_load_stackoverflow)
AT (1) ATE157844T1 (enrdf_load_stackoverflow)
DE (2) DE4237351A1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9903141D0 (en) * 1999-02-12 1999-04-07 Staples Group Plc Cutting machine blade guard

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE733231C (de) * 1941-10-11 1943-03-22 Krauss & Reichert Spezialmasch Schutzvorrichtung, insbesondere fuer das Bandmesser an Stoffzuschneidemaschinen
DE2619789C3 (de) * 1976-05-05 1982-03-11 Krauss U. Reichert Gmbh + Co Kg Spezialmaschinenfabrik, 7012 Fellbach Stoßmesser-Zuschneidemaschine mit Messerschutz
IT206147Z2 (it) * 1985-05-31 1987-05-29 Rockwell Rimoldi Spa Coltello a moitore per tagliare strati di tessuto o simili.

Also Published As

Publication number Publication date
EP0598285A1 (de) 1994-05-25
DE59307329D1 (de) 1997-10-16
DE4237351A1 (enrdf_load_stackoverflow) 1993-07-08
ATE157844T1 (de) 1997-09-15

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