EP0598285A1 - Reciprocating-knife cutting machine - Google Patents

Reciprocating-knife cutting machine Download PDF

Info

Publication number
EP0598285A1
EP0598285A1 EP93117861A EP93117861A EP0598285A1 EP 0598285 A1 EP0598285 A1 EP 0598285A1 EP 93117861 A EP93117861 A EP 93117861A EP 93117861 A EP93117861 A EP 93117861A EP 0598285 A1 EP0598285 A1 EP 0598285A1
Authority
EP
European Patent Office
Prior art keywords
knife
cutting machine
machine according
cutting
protective
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.)
Granted
Application number
EP93117861A
Other languages
German (de)
French (fr)
Other versions
EP0598285B1 (en
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/en
Application granted granted Critical
Publication of EP0598285B1 publication Critical patent/EP0598285B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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.
  • this knife guard can be, for example, in the form of a plastic glass hood which is U-shaped in plan view and which forms the U-shaped knife surrounds.
  • 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 cover, 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 cutting machine according to the invention is therefore based on the object of providing a simple and effective protective device for covering 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, an effective protection against contact of the butt knife cutting edge is achieved in that 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 rods 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 mm, so that a contact the front cutting edge 18 'is no longer possible.
  • "s1" can also be the direct distance of the respective rod 21, 22 to the knife tip 18 ', the "tip" 18' in Fig. 2 being the "front cutting edge".
  • the lateral distance s2 of the two protective bars 21, 22 is kept very small and is also s2 ⁇ 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, d. H. 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.

Abstract

A reciprocating knife cutting machine is proposed, which is used for cutting a plurality of layers of material placed on a base. In order to obtain a simple and effective knife protection device (20), two adjacent protective bars (21, 22) are arranged with slight spacing directly ahead of the cutting edge (18) of the reciprocating knife (3), which protective bars are connected in their lower region to the bow-shaped holding-down device (13) and project in their upper region into the connecting rod housing (27). <IMAGE>

Description

Die Erfindung betrifft eine Stoßmesser-Zuschneidemaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to a butt knife cutting machine according to the preamble of claim 1.

Aus der DE 26 19 789 B2 ist eine Stoßmesser-Schneidvorrichtung zur Bearbeitung von Flachmaterial, d. h. zum Schneiden mehrerer, auf einer tischplattenartigen Unterlage aufgelegter Stofflagen bekanntgeworden, die eine Messerschutzeinrichtung zur Abdeckung der Stoßmesser-Schneidkante aufweist. Wie in dieser Druckschrift beschrieben, war es bei älteren Stoßmesser-Zuschneidemaschinen üblich, daß die Schneidkante des Stoßmessers ungeschützt geführt wurde, was zu schweren Arbeitsunfällen führen konnte. Demzufolge wurden einige Stoßmesserschutzeinrichtungen vorgeschlagen, die eine Berührung des Stoßmessers vermeiden sollten. Wie in der oben genannten Druckschrift angegeben, kann dieser Messerschutz beispielsweise in Form einer in der Draufsicht U-förmigen Plastikglashaube bestehen, die das Stoßmesser U-förmig umgibt. Derartige Plexiglasverdeckungen haben den Nachteil, daß sie die Sicht auf die Schneidstelle aufgrund der ständigen Verstaubung und einer Parallaxenverschiebung behindern. Bei der zwangsläufig notwendigen Reinigung eines verstaubten Plexiglasschutzes besteht ebenfalls eine Verletzungsgefahr durch das Hineingreifen zwischen Messer und Innenseite der Verdeckung. Weiterhin ist das Zurückziehen der Maschine nach dem Trennschnitt durch die herabfallende Verdeckung nicht mehr ohne weiteres möglich, d. h. die Maschine muß über die Stofflage hinweg gehoben oder um den Zuschneidetisch herumgefahren werden. Eine solche Plexiglasverdeckung hat weiterhin den Nachteil, daß das manuelle Halten der Stofflage durch die Benutzerperson in unmittelbarer Schneidnähe nicht mehr möglich ist, da dieser Raum durch die Plexiglasabdeckung verdeckt ist. Hierdurch ergeben sich Schnittungenauigkeiten, die durch ein Hochnehmen der Schutzeinrichtung vermieden werden sollen, wodurch jedoch der Schutz nicht mehr gewährleistet ist. Da ein solcher Plastikschutz an der Niederhaltervorrichtung bzw. am Stoffdrücker befestigt ist, wird dieser noch schwerer und bewirkt durch das Verschieben der Stofflagen ungenaue Zuschnitte. Schließlich stellt die großräumige Plexiglasverdeckung einen zusätzlichen Ballast dar, der die Maschine noch kopflastiger macht und den Zugriff zur Gefahrenstelle dennoch nicht wirksam verhindert. Solche Plexiglasverdeckungen weisen demnach insgesamt eine Reihe von Nachteilen auf.From DE 26 19 789 B2 a butt knife cutting device for processing flat material, ie for cutting several layers of fabric placed on a table top-like base, has become known, which has a knife protection device for covering the butt knife cutting edge. As described in this document, it was common with older butt knife cutting machines that the cutting edge of the butt knife was guided unprotected, which could lead to serious accidents at work. As a result, some knife protection devices have been proposed to avoid touching the knife. As indicated in the above-mentioned publication, this knife guard can be, for example, in the form of a plastic glass hood which is U-shaped in plan view and which forms the U-shaped knife surrounds. Such plexiglass covers have the disadvantage that they obstruct the view of the cutting point due to the constant dust and a parallax shift. When cleaning 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. Furthermore, retracting the machine after the cut is no longer possible due to the falling cover, 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. Since such a plastic protection is attached to the hold-down device or to the fabric presser, it becomes even heavier and causes inaccurate cuts by moving the fabric layers. Finally, the large plexiglass cover represents an additional ballast, which makes the machine even more top-heavy and yet does not effectively prevent access to the danger zone. Such plexiglass covers therefore have a number of disadvantages overall.

Wie aus der oben genannten Druckschrift weiterhin entnehmbar ist, steht der Anordnung eines Messerschutzes unmittelbar vor oder neben der Stoßmesserschneidkante die Forderung entgegen, daß die Stoßmesser-Schneidkante gut einsehbar sein muß. Weiterhin weisen derartige handgeführte Stoßmessermaschinen unter dem Maschinengehäuse eine Schleifvorrichtung für die Stoßmesser-Schneidkante auf, die zum Schleifen aus einer oberen Ruhelage heraus längs des Stoßmessers nach unten abgesenkt und dann wieder angehoben wird. Eine Schutzeinrichtung unmittelbar vor der Stoßmesser-Schneidkante würde einer solchen Schleifvorrichtung im Wege stehen.As can also be seen from the above-mentioned document, the arrangement of a knife guard directly in front of or next to the butt knife cutting edge is countered by the requirement that the butt knife cutting edge must be clearly visible. Furthermore, such hand-held butt knife machines have, under the machine housing, a grinding device for the butt knife cutting edge, which is used to grind downwards from an upper rest position along the butt knife is lowered and then raised again. A protective device immediately in front of the knife edge would stand in the way of such a grinding device.

Die bekannte Einrichtung gemäß der oben genannten Druckschrift schlägt zur Lösung dieses Problems eine seitlich der Stoßmesser-Schneidkanten verlaufende, bandförmige Schutzeinrichtung vor, die in ihrem unteren Bereich mit dem auf- und abbewegbaren Niederhalter der Messerschutzeinrichtung verbunden ist und dessen flexibles Band sich im oberen Bereich bei dessen Aufwärtsbewegung beispielsweise aufrollt. Im untersten Bereich der Messerschutzeinrichtung ist das Stoßmesser sichtbar ausgebildet. Ein derartiger Stoßmesserschutz wird unterhalb der Schleifvorrichtung angeordnet, so daß eine gegenseitige Behinderung bei der Auf- und Abwärtsbewegung sowohl der Schleifvorrichtung als auch des Niederhalters nicht stattfindet. Nachteilig an dieser Einrichtung ist jedoch die aufwendige Mechanik für die Führung der seitlichen Abdeckbänder.To solve this problem, the known device according to the above-mentioned publication 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. In the lowest area of the knife protection device, 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, however, is the complex mechanism for guiding the side masking tapes.

Der erfindungsgemäßen Zuschneidemaschine liegt demzufolge die Aufgabe zugrunde, eine einfache und wirksame Schutzeinrichtung zur Abdeckung der Stoßmesser-Schneidkante zu schaffen, wobei zum einen keine Sichtbehinderung beim Schneidvorgang vorliegt und zum anderen auch die Schleifvorrichtung zum Schärfen der Stoßmesser-Schneidkante vollwirksam bleibt.The cutting machine according to the invention is therefore based on the object of providing a simple and effective protective device for covering 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.

Diese Aufgabe wird ausgehend von einer Stoßmesser-Zuschneidemaschine nach dem Oberbegriff des Anspruchs 1 durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved on the basis of a butt knife cutting machine according to the preamble of claim 1 by the characterizing features of claim 1.

In den Unteransprüchen sind vorteilhafte und zweckmäßige Weiterbildungen der Stoßmesser-Zuschneidemaschine gemäß Anspruch 1 angegeben.Advantageous and expedient further developments of the butt knife cutting machine according to claim 1 are specified in the subclaims.

Die erfindungsgemäße Stoßmesser-Schneidvorrichtung hat gegenüber den bekannten Einrichtungen den Vorteil, daß keinerlei Sichtbehinderungen in Form von Plexiglasscheiben oder Bandmesserabdeckungen vorhanden sind. Vielmehr wird ein wirksamer Schutz gegen Berührung der Stoßmesser-Schneidkante dadurch erzielt, daß in einem geringen Abstand vor der Stoßmesser-Schneidkante insbesondere zwei Schutzstäbe angeordnet sind, die derart eng die Schneidkante des Stoßmessers umgeben, daß eine Berührung der Schneidkante verhindert wird. Dabei sind die Schutzstäbe in ihrem unteren Bereich mit der Niederhaltervorrichtung bzw. dem Stoffdrückerfuß verbunden, der je nach Stofflagenhöhe nach oben geschoben wird. Beim Hochschieben der Niederhaltervorrichtung verschieben sich die Schutzstäbe ebenfalls nach oben und sind hierbei am Maschinengehäuse und insbesondere im Pleuelgehäuse geführt.The butt knife cutting device according to the invention has the advantage over the known devices that there are no obstructions in the form of plexiglass panes or band knife covers. Rather, an effective protection against contact of the butt knife cutting edge is achieved in that 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.

Durch den sehr einfachen Aufbau einer solchen Messerschutzeinrichtung können komplizierte Teile eingespart werden. Die Schutzstäbe bewegen sich mit der geführten Niederhaltervorrichtung und decken die Schneidkante des Stoßmessers wirksam ab.The very simple construction of such a knife guard means that complicated parts can be saved. The protective rods move with the guided hold-down device and effectively cover the cutting edge of the straight knife.

Weitere Einzelheiten der Erfindung sind in der Zeichnung dargestellt. In der nachfolgenden Beschreibung eines Ausführungsbeispiels sind weitere Einzelheiten und Vorteile der Erfindung angegeben.

Die Fig. 1
zeigt eine Seitenansicht einer erfindungsgemäßen Stoßmesser-Zuschneidemaschine,
die Fig. 2
eine Draufsicht entlang der Schnittfläche A-B in Fig. 1.
Further details of the invention are shown in the drawing. The following description of an exemplary embodiment provides further details and advantages of the invention.
1
shows a side view of a butt knife cutting machine according to the invention,
2
2 shows a plan view along the sectional area AB in FIG. 1.

Beschreibung eines Ausführungsbeispiels:Description of an embodiment:

Die in der Fig. 1 dargestellte Stoßmesser-Zuschneidemaschine 1 entspricht in ihrem grundsätzlichen Aufbau einer Maschine, wie sie beispielsweise in der DE 26 19 789 B2 gezeigt und beschrieben ist. Eine solche Maschine besitzt ein Maschinengehäuse 2 mit einem elektrischen Antrieb für ein sich auf- und abwärtsbewegendes Stoßmesser 3. Hierfür ist auf der Motorwelle 4 eine Schwungscheibe 5 mit einem Exzenterbolzen 6 vorgesehen, an welchem ein Pleuel 7 mit Lager 8 gelagert ist. Das untere Ende des Pleuels 7 ist mit dem Stoßmesserende 9 über ein Lager 10 verbunden. Der vorstehende bekannte Antrieb ist in der Zeichnung nur schematisch dargestellt.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. Such a machine has a machine housing 2 with an electric drive for an upward and downward moving thrust knife 3. For this purpose, 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.

Die Stoßmesser-Zuschneidemaschine 1 weist in ihrem unteren Bereich eine Fußplatte 11 auf, die über eine U-förmige Tragstütze 12 mit dem Maschinengehäuse 2 verbunden ist. Ein bügelförmiger Niederhalter 13 ist an einer vertikalen Stange 14 befestigt, die am Maschinengehäuse 2 auf- und abbewegbar geführt ist. Dabei enthält das Maschinengehäuse eine nicht näher dargestellte Bremseinrichtung für die Stange 14, die durch Betätigung eines Bedienungshebels gelöst werden kann, so daß der Niederhalter 13 unter seinem Eigengewicht nach unten fällt.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.

Eine solche Sicherheitseinrichtung ist in der nicht vorveröffentlichten älteren Anmeldung der Anmelderin P 42 08 375.3 beispielhaft beschrieben. Auf den Inhalt dieser Patentanmeldung wird ausdrücklich verwiesen.Such a safety device is described by way of example in the not previously published older application by the applicant P 42 08 375.3. We expressly refer to the content of this patent application.

In der Fig. 1 ist weiterhin eine Messerschleifvorrichtung 15 gezeigt, die aus zwei V-förmig zueinander ausgerichteten Schleifbändern 16, 17 besteht. Die Umlenkrollen für die Bänder der Messerschleifvorrichtung werden durch den Stoßmesserantrieb angetrieben, wobei die Schleifvorrichtung längs des Stoßmessers abgesenkt und wieder angehoben wird, um dessen Schneidkante 18 zu schärfen. Die Führung der Messerschleifvorrichtung geschieht über eine Führungsstange 19.1 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.

Zur Absicherung der vorderen Schneidkante 18 mit Schneidspitze 18' des Stoßmessers 3 befindet sich vor dem Stoßmesser 3 eine Messerschutzeinrichtung 20, die aus zwei unmittelbar vor der Schneidkante 18 angeordneten Schutzstäben 21, 22 besteht. Diese Schutzstäbe 21, 22 sind in ihrem unteren Bereich in jeweils eine Hülse 23 eingesteckt und mittels einer Schraube 24 verklemmt. Die Hülse 23 ist auf dem Niederhalter 13 befestigt. Die Schutzstäbe 21, 22 führen daher die Auf- und Abwärtsbewegung des Niederhalters 13 mit der vertikalen Stange 14 durch.To secure the front cutting edge 18 with the cutting tip 18 ′ of the butt knife 3, there is 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.

In seinem oberen Bereich ist der jeweilige Schutzstab 21, 22 in einer Führungshülse 25 am Maschinengehäuse 2 geführt und ragt entlang der in Fig. 1 dargestellten gestrichelten Linie 26 in das Pleuelgehäuse 27 der Zuschneidemaschine insbesondere in der obersten Stellung hinein. Dabei durchdringen die beiden Schutzstäbe 21, 22 die beiden Schleifbänderarme 16, 17 in einer jeweiligen Bohrung 28, so daß sowohl die Messerschleifvorrichtung 15 als auch die Niederhaltervorrichtung 13, 14 mit Schutzstangen 21, 22 unabhängig voneinander auf- und abbewegt werden können. Sofern die in das Pleuelgehäuse 27 bei dessen Aufwärtsbewegung hineinragenden Schutzstäbe 21, 22 zu eng an den Stoßmesserantrieb und insbesondere an die Pleuelstange 7 heranreichen, kann eine Abstandsvergrößerung durch eventuelle Abstandshülsen zwischen Pleuelgehäuse 27 (Gehäusedeckel) und Maschinengehäuse 2 mit einem zusätzlichen Dichtungsring bewerkstelligt werden. Durch diese Maßnahmen können auch ältere Maschinen mit entsprechenden Schutzstäben ausgestattet werden.In its upper area, 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.

Wie aus Fig. 2 ersichtlich, befindet sich die Verbindungsebene 30 der beiden Schutzstäbe 21, 22 in einem Abstand s₁ vor der "Spitze" 18' der Schneidkante 18 des Stoßmessers 3. Dieser Abstand s₁ beträgt vorteilhafterweise s₁ ≦ 8 mm, so daß eine Berührung der vorderen Schneide 18' nicht mehr möglich ist. Selbstverständlich kann "s₁" auch der direkte Abstand des jeweiligen Stabes 21, 22 zur Messerspitze 18' sein, wobei die "Spitze" 18' in Fig. 2 die "vordere Schneidkante" ist.As can be seen from Fig. 2, the connecting plane 30 of the two protective rods 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 mm, so that a contact the front cutting edge 18 'is no longer possible. Of course, "s₁" can also be the direct distance of the respective rod 21, 22 to the knife tip 18 ', the "tip" 18' in Fig. 2 being the "front cutting edge".

Auch der seitliche Abstand s₂ der beiden Schutzstäbe 21, 22 ist sehr klein gehalten und beträgt ebenfalls s₂ ≦ 8 mm. Hierdurch ist sichergestellt, daß die vordere Schneidspitze 18' der Schneidkante 18 aufgrund der beiden Schutzstäbe 21, 22 nicht manuell berührt werden kann. Hierzu gibt eine Vorschrift der deutschen Berufsgenossenschaft an, daß ein ausreichender Schutz vor scharfen Kanten gegen Berühren bei einer Spaltbreite von ≦ 8 mm gewährleistet ist, d. h. die durch die Schutzstäbe gebildete Spaltbreite s₁, s₂ muß deutlich kleiner als die Fingerbreite sein.The lateral distance s₂ of the two protective bars 21, 22 is kept very small and is also s₂ ≦ 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. For this purpose, 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, d. H. the gap width s 1, s 2 formed by the protective rods must be significantly smaller than the finger width.

Aus Fig. 2 ist die U-förmige Ausbildung der Tragstütze 12 ersichtlich, in welcher das Stoßmesser 3 geführt ist, so daß nur der vordere Bereich 29 mit der Schneidkante 18 aus der U-förmigen Tragstütze 12 herausragt.From Fig. 2 the U-shaped design of the support bracket 12 can be seen, in which the butt knife 3 is guided so that only the front region 29 with the cutting edge 18 protrudes from the U-shaped support bracket 12.

Die Erfindung ist nicht auf das dargestellte und beschriebene Ausführungsbeispiel beschränkt. Sie umfaßt auch vielmehr alle fachmännischen Weiterbildungen und Verbesserungen im Rahmen des erfindungsgemäßen Gedankens.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.

Claims (9)

Stoßmesser-Zuschneidemaschine zum Schneiden mehrerer, auf einer tischplattenartigen Unterlage aufgelegter Stofflagen oder dergleichen, mit einem, von einem Maschinengehäuse sich nach unten erstreckenden Stoßmesser (3), dessen Schneidkante (18) mittels einer Messerschutzeinrichtung (20) abdeckbar ist, die mit einer auf- und abbewegbaren Niederhaltervorrichtung (13, 14) verbunden ist, dadurch gekennzeichnet, daß die Messerschutzeinrichtung (20) aus wenigstens zwei, sich in einem geringen Abstand vor der Schneidkante (18) befindlichen, nebeneinander angeordneten Schutzstäben (21, 22) gebildet ist, die an ihren unteren Enden mit der Niederhaltervorrichtung (13, 14) verbunden sind.Butt knife cutting machine for cutting several layers of fabric or the like placed on a table-top-like base, with a butt knife (3) extending downward from a machine housing, the cutting edge (18) of which can be covered by a knife protection device (20) which can be covered with a and movable hold-down device (13, 14), characterized in that the knife guard (20) is formed from at least two protective bars (21, 22) which are arranged next to one another and are located at a short distance from the cutting edge (18) their lower ends are connected to the hold-down device (13, 14). Zuschneidemaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Schutzstäbe (21, 22) derart um die vordere Schneidkante (18') des Stoßmessers (3) angeordnet sind, daß ein Spalt von ≦ 8 mm entsteht.Cutting machine according to claim 1, characterized in that the protective bars (21, 22) are arranged around the front cutting edge (18 ') of the butt knife (3) in such a way that a gap of ≦ 8 mm is produced. Zuschneidemaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand von der Verbindungsebene (30) durch die beiden Schutzstäbe (21, 22) zur Schneidkante (18') einen Betrag von s₁ ≦ 8 mm aufweist.Cutting machine according to claim 1, characterized in that the distance from the connecting plane (30) through the two protective bars (21, 22) to the cutting edge (18 ') has an amount of s₁ ≦ 8 mm. Zuschneidemaschine nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand zwischen den beiden Schutzstäben (21, 22) s₂ ≦ 8 mm beträgt.Cutting machine according to claim 1, characterized in that the distance between the two protective bars (21, 22) is s₂ ≦ 8 mm. Zuschneidemaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Schutzstäbe (21, 22) im Pleuelgehäuse (27) längs geführt sind.Cutting machine according to claim 1, characterized in that the protective rods (21, 22) are guided longitudinally in the connecting rod housing (27). Zuschneidemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß unterhalb des Maschinengehäuses (2) eine, aus zwei V-förmig zueinander angeordneten, umlaufenden Schleifbändern bestehende Messerschleifvorrichtung (15) vorgesehen ist, wobei die Schutzstäbe (21, 22) vorzugsweise durch die Schleifbänderarme (28) der Messerschleifvorrichtung hindurchtreten.Cutting machine according to one of the preceding claims, characterized in that a knife grinding device (15) consisting of two circumferential grinding belts arranged in a V-shape with respect to one another is provided below the machine housing (2), the protective rods (21, 22) preferably being provided by the grinding belt arms ( 28) of the knife sharpening device. Zuschneidemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schutzstäbe (21, 22) bei ihrer Aufwärtsbewegung mit dem Niederhalter (13, 14) in das Pleuelgehäuse (27) eindringen.Cutting machine according to one of the preceding claims, characterized in that the protective bars (21, 22) penetrate into the connecting rod housing (27) with the hold-down device (13, 14) during their upward movement. Zuschneidemaschine nach Anspruch 6, dadurch gekennzeichnet, daß die Schutzstäbe (21, 22) im Pleuelgehäuse (27) vor dem umlaufenden Pleuel (7) geführt sind, wobei gegebenenfalls Abstandshülsen und/oder Dichtungen zwischen Maschinengehäuse (2) und Pleuel-Abdeckgehäuse (27) vorgesehen sind.Cutting machine according to claim 6, characterized in that the protective rods (21, 22) are guided in the connecting rod housing (27) in front of the rotating connecting rod (7), with spacer sleeves and / or seals between the machine housing (2) and connecting rod cover housing (27) being optionally are provided. Zuschneidemaschine nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Niederhalter (13) als Stoffdrückerfuß ausgebildet ist und an seiner oberen Fläche Befestigungshülsen (23) mit Befestigungsschrauben (24) aufweist, in welchen die unteren Enden der Schutzstäbe (21, 22) fixiert sind.Cutting machine according to one of the preceding claims, characterized in that the hold-down device (13) is designed as a presser foot and has fastening sleeves (23) with fastening screws (24) on its upper surface, in which the lower ends of the protective rods (21, 22) are fixed .
EP93117861A 1992-11-05 1993-11-04 Reciprocating-knife cutting machine Expired - Lifetime EP0598285B1 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=6472161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93117861A Expired - Lifetime EP0598285B1 (en) 1992-11-05 1993-11-04 Reciprocating-knife cutting machine

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350658A (en) * 1999-02-12 2000-12-06 Staples Group Plc Blade guard

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619789A1 (en) * 1976-05-05 1977-11-17 Krauss & Reichert Maschf Blank cutting appts. - has reciprocable knife provided with protector formed by tape extending along knife sides and provided with recess at cutting point
GB2175529A (en) * 1985-05-31 1986-12-03 Rockwell Rimoldi Spa Motor-driven cutter for cutting layers of fabric or the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE733231C (en) * 1941-10-11 1943-03-22 Krauss & Reichert Spezialmasch Protective device, especially for the band knife on fabric cutting machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2619789A1 (en) * 1976-05-05 1977-11-17 Krauss & Reichert Maschf Blank cutting appts. - has reciprocable knife provided with protector formed by tape extending along knife sides and provided with recess at cutting point
GB2175529A (en) * 1985-05-31 1986-12-03 Rockwell Rimoldi Spa Motor-driven cutter for cutting layers of fabric or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2350658A (en) * 1999-02-12 2000-12-06 Staples Group Plc Blade guard

Also Published As

Publication number Publication date
DE59307329D1 (en) 1997-10-16
EP0598285B1 (en) 1997-09-10
DE4237351A1 (en) 1993-07-08
ATE157844T1 (en) 1997-09-15

Similar Documents

Publication Publication Date Title
CH621464A5 (en)
DE1527304A1 (en) Cutting device
EP0598285B1 (en) Reciprocating-knife cutting machine
DE2517524A1 (en) PROTECTIVE DEVICE FOR A SKINNING MACHINE
DE2619789C3 (en) Straight knife cutting machine with knife protection
DE3011926C2 (en) Multi-blade circular saw
DE2250087A1 (en) SAFETY DEVICE FOR SKINNING OR DESINDING MACHINES
DE3223281A1 (en) Device for sawing or cutting
AT396666B (en) LANDING MACHINE SAW FOR CUTTING PANELS ARRANGED AT ABOUT HORIZONTAL LEVEL
DE19749458A1 (en) Profile cutting machine, especially for foamed material
DE2132125A1 (en) ROTATING SHEARS, IN PARTICULAR FOR FAST-RUNNING ROLLED MATERIAL
DE2625947C2 (en) Flying scissors for cross-cutting sheet metal strip
AT517190B1 (en) Machine for cutting panels
DE3040422C2 (en) Guillotine shears for sheet metal and the like.
DE2709367C2 (en) Short front mining machine for mine work
DE2521531C3 (en) Format dividing saw
DE3926976C2 (en) Device for introducing a substantially vertical bottom slot
DE819743C (en) Cutting unit for mowing machines
DE7614153U1 (en) PUSH KNIFE CUTTING MACHINE FOR FLAT MATERIAL
DE1657218C3 (en) Slicer
DE2636738A1 (en) CUTTING DEVICE FOR CONTINUOUSLY RUNNING TAPE MATERIAL WITH A JOINT DRIVE
DE743457C (en) For the dismantling in the face along the excavation joint, movable cutting machine with two swiveling chain cutting arms
DE4206341C2 (en) Side cutting device for three-knife cutting machines
DE6911788U (en) HEIGHT-ADJUSTABLE PROTECTION DEVICE FOR TAPE KNIFE CUTTING MACHINES FOR FABRICS OR SIMILAR MACHINERY
DE2107139A1 (en) Safety device for electric bench

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB IT LI NL PT

17P Request for examination filed

Effective date: 19940826

17Q First examination report despatched

Effective date: 19950628

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB IT LI NL PT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970910

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19970910

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970910

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19970910

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970910

REF Corresponds to:

Ref document number: 157844

Country of ref document: AT

Date of ref document: 19970915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59307329

Country of ref document: DE

Date of ref document: 19971016

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Effective date: 19971210

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19970910

BERE Be: lapsed

Owner name: W. STEINHAUSER G.M.B.H. & CO. K.G. MASCHINENFABRI

Effective date: 19971130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20021206

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040602