DK3081355T3

DK3081355T3 - CUTTING DEVICES

Info

Publication number: DK3081355T3
Application number: DK16157258.1T
Authority: DK
Inventors: Fritz Stein
Original assignee: Stein Maschb Gmbh & Co Kg
Priority date: 2015-03-26
Filing date: 2016-02-25
Publication date: 2018-06-18
Also published as: EP3081355A1; JP2016182665A; DE202015101535U1; JP6131294B2; EP3081355B1

Description

Beskrivelse:Description:

Den foreliggende opfindelse angêr en skaereindretning ifolge den indledende del af krav 1.The present invention relates to a cutting device according to the preamble of claim 1.

Ved sêdanne skaereindretninger med en sêkaldt "guillotine" bliver der nedsaen-ket en faststêende kniv pê den profil, der skal afkortes, hvorved profilen gen-nemskaeres. Til det formêl er et skaer pa kniven skrêt i forhold til nedsaenk-ningsbevaegelsen fastgjort pê en knivholder, som ved hjselp af en drivindret-ning kan bevaeges op og ned. En sédan indretning er eksempelvis kendt fra DE 201 10 794 U1.In such cutting devices with a so-called "guillotine", a fixed knife is lowered on the profile to be cut, thereby cutting the profile. For this purpose, a cutter on the knife is inclined in relation to the immersion movement attached to a knife holder which can be moved up and down by means of a drive device. Such a device is known, for example, from DE 201 10 794 U1.

Ved uregelmaessige tvaersnit af en kunststofprofil med et grundelement og en ansats, der rager ud fra grundelementet, som man som regel kan stode pa i forbindelse med vinduesprofiler, opstêr der ofte en situation, hvor den skrat stêende kniv, nêr den saenkes ned pa kunststofprofilen, i forste omgang rammer kunststofprofilens ansats i siden, hvilken ansats rager ud over grundelementet. Da ansatsen ikke ligger pa skaereindretningens skaerebord og sêledes ikke understottes af dette under skaereprocessen, opstar der derfor, nar kniven rammer kunststofprofilen, en trykkraft pê ansatsen, hvilken trykkraft kan med-fore, at profi11vsersnittet deformeres. En deformering af profiltvaersnittet med-forer ofte, at snittet ikke sker praecist i det onskede skaereniveau, og profilen endnu engang skal skaeres nojagtigt for dens videre anvendelse.In the case of irregular cross sections of a plastic profile with a basic element and a projecting protrusion from the basic element, which can usually be relied on in connection with window profiles, a situation where the scraping knife when cut down on the plastic profile often arises, Initially, the side profile of the plastic profile strikes, which project extends beyond the basic element. Therefore, since the cutter is not on the cutting device's cutting table and thus is not supported by this during the cutting process, when the knife hits the plastic profile, a compressive force on the cutter, which compressive force can cause the profile section to deform. Deformation of the profile section often means that the cut does not occur precisely at the desired cutting level and the profile must once again be precisely cut for its further use.

Ved profiltvaersnit med en ansats, som rager horisontalt ud over grundelementet, er det afgorende, om det skrê snit starter ved den frie kant af ansatsen eller ved grundelementet. Hvis snittet i forste omgang starter ved grundelementet og fortsaetter i reining mod den udragende ansats, kan deformeringen af en kunststofprofil minimeres under skaereprocessen.In the case of a profile cross-section with a projection extending horizontally beyond the base element, it is decisive whether the oblique section starts at the free edge of the base or at the base element. If the cut initially starts at the base element and continues in reining toward the projecting shoulder, the deformation of a plastic profile can be minimized during the cutting process.

Kunststofprofiler bliver normalt ekstruderet. Den udragende ansats kan ved kunststofprofiler optraede béde i hojre og venstre side i kunststofprofilens transportretning.Plastic profiles are usually extruded. In the case of plastic profiles, the protruding shoulder can act on both the right and left sides in the transport profile of the plastic profile.

Da skaereindretningerne ofte anvendes direkte efter en ekstruder pa en eks-truktionsvej, er det kun muligt at tilfore den profil, der skal afkortes, fra én side af skaereindretningen.Since the cutting devices are often used directly after an extruder on an extrusion path, it is only possible to feed the profile to be truncated from one side of the cutting device.

Dette betyder, at, afhaengigt af hvilken side den udragende ansats befinder sig pa, skal oriënteringen af skaereindretningens skrêt staende kniv tilpasses til kunststofprofilen.This means that, depending on which side of the projecting member is on, the orientation of the cutting blade's standing blade must be aligned with the plastic profile.

For at lose dette problem foreslas det i DE 2012 005 943 U1, at man ved hjaelp af en drejeligt monteret bordplade drejer den skrêt stillede kniv om en akse, der forlober parallelt med knivens nedsaenkningsbevaegelse, med 180°.In order to solve this problem, in DE 2012 005 943 U1 it is proposed that by means of a pivotally mounted table top, the inclined knife rotates about an axis extending parallel to the immersion movement of the knife by 180 °.

Denne indretning, som nu gor det muligt at skaere kunststofprofiler med ansat-ser, som rager ud i hojre og venstre side i den ekstruderede kunststofprofils transportretning, haren relativtomkostningskraevende konstruktion.This device, which now makes it possible to cut plastic profiles with employees projecting to the right and left sides in the transport direction of the extruded plastic profile, has a relatively costly construction.

Formalet med den foreliggende opfindelse er derfor at stille en forbedret skae-reindretning til radighed, med hvilken det er muligt atforkorte kunststofprofiler, som har ansatser, der rager ud i hojre og venstre side i den ekstruderede kunststofprofils transportretning.Therefore, the object of the present invention is to provide an improved cutting device with which it is possible to shorten plastic profiles having abutments projecting to the right and left sides in the transport direction of the extruded plastic profile.

Ifolge opfindelsen opfyldes formêlet af en skaereindretning, omfattende en skaereenhed med en i det vaesentlige U-formet knivholder, som kan nedsaen-kes i skaereretningen, med et forste og et andet ben og en spaendeindretning til fastspaending af en skaerekniv i knivholderen, hvor der pê hvert ben af kniv-holderen er tilvejebragt et fastgorelsessted til losbar optagelse af en skaerekniv, hvor der pê hvert ben er tilvejebragt to fastgorelsessteder, hvor respektivt et fastgorelsessted af det forste ben er tilknyttet et fastgorelsessted af det andet ben og udgor et fastgorelsesstedpar, som er egnet til at holde skaerekniven i en forudbestemt skaereposition, og hvor hvert fastgorelsesstedpar har et fastgorelsessted, der erforskydeligt ved hjaelp af spaendeindretningen.According to the invention, the object of the invention is fulfilled by a cutting device comprising a cutting unit with a substantially U-shaped knife holder which can be lowered in the cutting direction, with a first and second leg and a clamping device for securing a cutting knife in the knife holder, where each leg of the knife holder is provided with a securing point for releasably receiving a cutting knife, where on each leg are provided two securing points where a securing point of the first leg is associated with a securing point of the second leg and constituting a securing point pair which is suitable for holding the cutting knife in a predetermined cutting position, and each pair of attachment points having an attachment point which is displaceable by means of the clamping device.

Ved hjaelp af skaereindretningen ifolge opfindelsen er det muligt at holde en skaerekniv i to forskellige stillinger, som er skrê i forhold til knivholderens ned- saenkningsbevaegelse. Fastg0relsesstedet for hvert fastgorelsesstedpar, hvil-ket fastgorelsessted er forskydeligt ved hjaelp af spaendeindretningen, sorger for, at skaerekniven fastspaendes sikkert i skaereindretningen. I en foretrukken udforelsesform af en skaereindretning er afstandene mellem de to fastgorelsessteder for hvert fastgorelsesstedpar ens, saledes at en og samme skaerekniv kan holdes og fastgores i de to skaerepositioner, der er for-udangivet af de to fastgorelsesstedpar.By means of the cutting device according to the invention it is possible to hold a cutting knife in two different positions which are inclined in relation to the lowering movement of the knife holder. The point of attachment of each pair of attachment points, which attachment point is displaceable by means of the clamping device, ensures that the cutting knife is securely fastened in the cutting device. In a preferred embodiment of a cutting device, the distances between the two fastening points for each fastening point pair are the same, such that one and the same cutting knife can be held and secured in the two cutting positions predetermined by the two fastening point pairs.

Det er desuden en fordel, at hvert fastgorelsesstedpar udgor en forbindelses-linje mellem de to fastgorelsessteder, og de to forbindelseslinjer for fastgorel-sesstedparrene skaerer hinanden inde i den U-formede knivholder. Saledes kan de to fastgorelsesstedpar tilvejebringe to fastgorelsespositioner med haeldningsvinkel i forhold til knivholderens nedsaenkningsakse, hvilke har hhv. forskellige fortegn og drejeretninger.In addition, it is an advantage that each attachment site pair forms a connecting line between the two attachment sites and the two connection lines of the attachment site pairs intersect within the U-shaped knife holder. Thus, the two attachment point pairs can provide two inclination angle attachment positions with respect to the cutter axis lowering axis, which have, respectively. different signs and directions.

Herved er det desuden foretrukket, at fastgorelsesstederne i forhold til midter-planet af knivholderen er anbragt spejlsymmetrisk pa det forste og andet ben af knivholderen. Saledes adskiller haeldningsvinklerne i de to fastgorelsespo-sitioner sig udelukkende i hhv. drejeretningen og i deres fortegn, saledes at spejlvendte kunststofprofiler kan skaeres med den samme kvalitet.Hereby, it is further preferred that the fixing points relative to the center plane of the knife holder are arranged symmetrically on the first and second legs of the knife holder. Thus, the angles of inclination in the two fixing positions differ exclusively in respectively. the direction of rotation and in their sign, so that mirrored plastic profiles can be cut with the same quality.

Det er en fordel, at hvert fastgorelsesstedpar har et forskydeligt fastgorelses-sted i form af en forskydelig tap og et ikke-forskydeligt fastgorelsessted i form af en stiv bolt.It is an advantage that each pair of attachment points has a displaceable attachment point in the form of a displaceable pin and a non-displaceable attachment point in the form of a rigid bolt.

Den forskydelige tap og den stive bolt har fortrinsvis ca. den samme diameter, saledes at det er muligt at vende en skaerekniv med boringer, som den forskydelige tap og den stive bolt kan fores ind i. Dette kan fore til en betydelig for-ogelse af levetiden for en skaerekniv. I en foretrukken udforelsesform kan de forskydelige fastgorelsessteder af de to fastgorelsesstedpar aktiveres ved hjaelp af en faelles spaendeindretning. Dette muliggor en forholdsvis nem opbygning af skaereindretningen. I en foretrukken udforelsesform er det forskydelige fastgorelsessted af et for-ste fastgorelsesstedpar tilvejebragt pa knivholderens forste ben, og det forskydelige fastgorelsessted af et andet fastgorelsesstedpar er tilvejebragt pa knivholderens andet ben. I en alternativ udforelsesform er det forskydelige fastgorelsessted af et forste fastgorelsesstedpar tilvejebragt pa et ben af knivholderen, og det forskydelige fastgorelsessted af et andet fastgorelsesstedpar er tilvejebragt pa det samme ben af knivholderen som det forskydelige fastgorelsessted af det forste fastgorelsesstedpar.The displaceable pin and the rigid bolt preferably have approx. the same diameter, so that it is possible to turn a cutting knife with bores into which the sliding pin and the rigid bolt can be inserted. This can lead to a significant increase in the life of a cutting knife. In a preferred embodiment, the displaceable attachment sites of the two attachment site pairs can be activated by a common clamping device. This allows for a relatively easy construction of the cutting device. In a preferred embodiment, the displaceable attachment site of a first attachment site pair is provided on the first leg of the knife holder and the displaceable attachment site of another attachment site pair is provided on the second leg of the knife holder. In an alternative embodiment, the displaceable attachment point of a first attachment pair is provided on one leg of the knife holder and the displaceable attachment site of another attachment pair is provided on the same leg of the knife holder as the displaceable attachment point of the first attachment pair.

Herved fas en flerhed af forskellige spaendeindretninger, ved hjaelp af hvilke de forskydelige tapper kan aktiveres.Hereby, a plurality of different clamping devices are available by means of which the sliding pins can be activated.

Saledes er det foretrukket, at spaendeindretningen har en lofteanordning, og det forskydelige fastgorelsessted af et forste fastgorelsesstedpar og det forskydelige fastgorelsessted af det andet fastgorelsesstedpar kan aktiveres ved hjaelp af lofteanordningen.Thus, it is preferred that the clamping device has a ceiling device and the displaceable attachment point of a first attachment pair and the displaceable attachment site of the second attachment pair may be actuated by the ceiling assembly.

Alternativt har spaendeindretningen en excentrisk aksel, og det forskydelige fastgorelsessted af et forste fastgorelsesstedpar og det forskydelige fastgorelsessted af et andet fastgorelsesstedpar kan aktiveres ved hjaelp af den ex-centriske aksel. I en foretrukken videreudvikling har spaendeindretningen holdemidler til skae-rekniven for at holde skaerekniven pa tvaers af skaereretningen i transportret-ningen af profilen, der skal afkortes.Alternatively, the clamping device has an eccentric shaft and the displaceable attachment site of a first attachment site pair and the displaceable attachment site of a second attachment site pair can be actuated by the eccentric shaft. In a preferred further development, the clamping device has means for the cutting knife to hold the cutting knife across the cutting direction in the direction of transport of the profile to be cut.

Foretrukne udforelsesformer af opfindelsen vil blive naermere uddybet ved hjaelp aide vedlagte tegninger, hvor:Preferred embodiments of the invention will be further elaborated by the accompanying drawings, in which:

Fig. 1 er et perspektivisk udsnit af en skaereindretning ifolge en forste udforelsesform,FIG. 1 is a perspective view of a cutting device according to a first embodiment;

Fig. 2 er et langsgaende tvaersnit gennem en knivholder pa den i fig. 1 viste skaereindretning,FIG. 2 is a longitudinal cross-section through a knife holder of the FIG. 1,

Fig. 3 er en gengivelse set ovenfra af en base af knivholderen, der er vist i figur 1 og 2,FIG. 3 is a plan view of a base of the knife holder shown in Figures 1 and 2;

Fig. 4 er et perspektivisk udsnit af en skaereindretning ifolge en anden udforelsesform,FIG. 4 is a perspective view of a cutting device according to another embodiment;

Fig. 5 er et yderligere perspektivisk udsnit af en skaereindretning ifolge en anden udforelsesform,FIG. 5 is a further perspective view of a cutting device according to another embodiment;

Fig. 6 er et tvaersnit gennem en knivholder ifolge den anden udforelses-form,FIG. 6 is a cross-section through a knife holder according to the second embodiment,

Fig. 7 er et deludsnit af skaereindretningen ifolge den anden udforelses-form ogFIG. 7 is a partial section of the cutting device according to the second embodiment and

Fig. 8 er en gengivelse set ovenfra af en base af knivholderen i den anden udforelsesform.FIG. 8 is a plan view of a base of the knife holder in the second embodiment.

Fig. 1 viser et udsnit af en skaereindretning 10, omfattende en skaereenhed 12 med derpa fastgjorte skaereknive 14 og et skaerebord 16. I skaerebordet 16 er der tilvejebragt en skaerespalte 18.FIG. 1 shows a section of a cutting device 10 comprising a cutting unit 12 with cutting blades 14 attached thereto and a cutting table 16. A cutting slot 18 is provided in the cutting table 16.

Selvom der i fig. 1 og andre viste figurer er afbildet to skaereknive 14, sa er kun en af de to viste knive monteret, nar skaereindretningen er i drift. De to skaereknive, der er vist i fig. 1, viser udelukkende, som vil blive uddybet naermere i det nedenstaende, to forskellige skaerepositioner.Although in FIG. 1 and other figures shown, two cutting blades 14 are depicted, so only one of the two blades shown is mounted when the cutting device is in operation. The two cutting blades shown in FIG. 1, which, which will be elaborated on in the following, show only two different cutting positions.

Fig. 1 viser skaereenheden 12 og skaerebordet 16 sammen med en kunststof-profil 19, derskal afkortes, forfra, dvs. med blikket i transportretningen af kunst-stofprofilen 19. Skaereenheden 12 omfatter en i det vaesentlige U-formet knivholder 20, der kan nedsaenkes, med et forste ben 22, et andet ben 24 og en base 26 (se fig. 2).FIG. 1 shows the cutting unit 12 and the cutting table 16 together with a plastic profile 19, which must be shortened from the front, ie. with the gaze in the transport direction of the plastic profile 19. The cutting unit 12 comprises a substantially submerged U-shaped knife holder 20 with a first leg 22, a second leg 24 and a base 26 (see Fig. 2).

Skaereindretningen 10 anvendes til afkortning af kunststofprofiler. Flerved bli-ver skaereenheden 12 sammen med en skaerekniv 14 nedsaenket i retning af skaerebordet 16. Skaerekniven 14 er skrat orienteret i forhold til skaereenhe-dens nedsaenkningsakse, fortrinsvis i en vinkel mellem 45° og 75°, saledes at kniven 14, der star skrat i forhold til skaerebordets 16 plan, forst gar ned i en randside af kunststofprofilen 19, der ligger p skaerebordet, og derefter skaerer gennem kunststofprofilen 19. Flerved bliver skaerekniven 14 fort nedad gennem skaerespalten 18.The cutting device 10 is used for shortening plastic profiles. In this case, the cutting unit 12, together with a cutting knife 14, is lowered in the direction of the cutting table 16. The cutting knife 14 is laughably oriented relative to the cutting unit's lowering axis, preferably at an angle between 45 ° and 75 °, so that the knife 14 which starts laughing relative to the plane of the cutting table 16, first descends into an edge side of the plastic profile 19, which lies on the cutting table, and then cuts through the plastic profile 19. In this way, the cutting knife 14 is fast downward through the cutting slot 18.

Som det isaer fremgar af fig. 2, er der tilvejebragt to fastgorelsessteder 28, 30 pa det forste ben 22 og to fastgorelsessteder 32, 34 pa det andet ben 24. Fastgorelsesstedet 28 pa det forste ben 22 og fastgorelsesstedet 32 pa det andet ben 24 er udformet som forskydelige tapper, mens fastgorelsesstederne 30 pa det forste ben 22 og fastgorelsesstedet 34 pa det andet ben 24 er udformet som faststaende bolte.As can be seen in particular from FIG. 2, two fasteners 28, 30 on the first leg 22 and two fasteners 32, 34 on the second leg 24. are provided, the fasteners 28 on the first leg 22 and the fasteners 32 on the second leg 24 are designed as slidable pins, while the fasteners are provided. 30 on the first leg 22 and the fixing point 34 on the second leg 24 are formed as fixed bolts.

Den forskydelige tap 28 pa det forste ben 22 og bolten 34 pa det andet ben 24 udgor et forste fastgorelsesstedpar. Den forskydelige tap 32 pa det andet ben 24 og bolten 30 pa det forste ben 22 udgor et andet fastgorelsesstedpar. Hvert fastgorelsesstedpar er egnet til at holde en skaerekniv 14 i en forudbestemt skaereposition.The displaceable pin 28 on the first leg 22 and the bolt 34 on the second leg 24 constitute a first attachment point pair. The displaceable pin 32 on the second leg 24 and the bolt 30 on the first leg 22 constitute a second attachment site pair. Each attachment pair is suitable for holding a cutting knife 14 in a predetermined cutting position.

Hvert fastgorelsesstedpar udgor en forbindelseslinje mellem de to fastgorelsessteder hhv. 28, 34 og 32, 30, hvor fastgorelsesstedparrenes to forbindel-seslinjer skaerer hinanden inde i den U-formede knivholder 20.Each attachment point pair forms a connecting line between the two attachment points respectively. 28, 34 and 32, 30, where the two connecting lines of the attachment point pairs intersect within the U-shaped knife holder 20.

Saledes kan en skaerekniv 14 fastgores i to forskellige skaerepositioner pa knivholderen 20, hvor skaerekniven er udbojet i en forste skaereposition i for-hold til en horisontal position i urets retning og i en anden skaereposition i for-hold til en horisontal position mod urets retning.Thus, a cutting knife 14 can be secured in two different cutting positions on the knife holder 20, where the cutting knife is bent in a first cutting position in relation to a horizontal position in the clockwise direction and in a second cutting position in relation to a horizontal position in the counterclockwise direction.

De to knive 14, der er vist i fig. 1, tydeliggorde to positioner, hvori en kniv 14 kan holdes ved hjaelp af det forste fastgorelsesstedpar eller det andet fastgorelsesstedpar.The two blades 14 shown in FIG. 1, two positions are defined in which a knife 14 can be held by means of the first attachment place pair or the second attachment place pair.

Afstandene mellem den forskydelige tap 28 og bolten 34 og afstanden mellem den forskydelige tap 32 og bolten 30 pa det andet fastgorelsesstedpar er ens, saledes at en og samme skaerekniv 14 kan holdes og fastgores i begge skaerepositioner.The distances between the displaceable pin 28 and the bolt 34 and the distance between the displaceable pin 32 and the bolt 30 on the second attachment site pair are the same, so that the same cutting knife 14 can be held and secured in both cutting positions.

Herved har skaerekniven 14 boringer, som er egnet til bade at kunne ga gen-nem de forskydelige tapper 28, 32 og boltene 34, 30. De forskydelige tapper 28, 32 og boltene 34, 30 har fortrinsvis ca. den samme diameter.Hereby, the cutting knife 14 has bores which are suitable for baths to pass through the slidable pins 28, 32 and the bolts 34, 30. The slidable pins 28, 32 and the bolts 34, 30 preferably have approx. the same diameter.

Fastggrelsesstederne 28, 30, 32 og 34 ligger i et plan parallelt med skaerepla-net, saledes at skaereknivene 14, der er fastgjort i fastgorelsesstederne hhv. 28, 34 og 30, 32, uden videre aendringer pa skaereindretningen 12 vekselvirker med skaerespalten 18, dvs. kan ga ned i den.The fastening points 28, 30, 32 and 34 lie in a plane parallel to the cutting plane, so that the cutting knives 14 which are fixed in the fastening places respectively. 28, 34 and 30, 32, without further modifications to the cutting device 12, interact with the cutting slot 18, i. can delve into it.

Fastgorelsesstederne 28, 30, 32, 34 er orienteret spejlsymmetrisk i forhold til midterplanet af knivholderen 20, isaer i forhold til de indvendige sider af de to ben 22, 24. Flerved rammer skaereknivene 14 uafhaengigt af, i hvilken skaere-position de er fastgjort i, kunststofprofilen 19, der skal afkortes, i samme vinkel.The attachment points 28, 30, 32, 34 are oriented mirror-symmetrically with respect to the median plane of the knife holder 20, in particular with respect to the inner sides of the two legs 22, 24. In addition, the cutting blades 14 regardless of the cutting position they are fixed in , the plastic profile 19 to be truncated at the same angle.

Skaereindretningen 10 har endvidere eksempelvis en hydraulisk eller pneuma-tisk aktiverbar spaendeindretning 36 med to cylindre 38a, 38b over knivholderen 20, som respektivt indvirker pa en fri ende af en drejeligt monteret loftearm 40a, 40b. De drejelige loftearme 40a, 40b er orienteret langs hhv. det forste ben 22 og langs det andet ben 24 og aktiveres synkront ved hjaelp af spaende-indretningen 36.The cutting device 10 further has, for example, a hydraulically or pneumatically actuable tensioning device 36 with two cylinders 38a, 38b over the knife holder 20, which respectively act on a free end of a rotatably mounted ceiling arm 40a, 40b. The swivel ceiling arms 40a, 40b are oriented along, respectively. the first leg 22 and along the second leg 24 and activated synchronously by means of the clamping device 36.

Fiver drejelig loftearm 40a, 40b erforbundet med en forskydelig tap 28, 32.Fiver swivel ceiling arm 40a, 40b is connected with a slidable pin 28, 32.

Desuden er der tilvejebragt en knivfikseringsindretning 42 (se fig. 3). Knivfik-seringsindretningen 42 omfatter to fikseringsenheder 44a, 44b, som er anbragt respektivt pa et ben 22, 24. Fiver fikseringsenhed 44a, 44b omfatter igen en cylinder 46a, 46b, et med cylinderen 46a, 46b ledforbundet stangsystem 48a, 48b, hvorpa der vinkelret her er anbragt en drejelig stang 50a, 50b, hvor de drejelige staenger 50a, 50b respektivt i det vaesentlige er orienteret parallelt med hhv. det forste ben 22 og det andet ben 24 af knivholderen 20.In addition, a knife fixing device 42 is provided (see Fig. 3). The knife fixing device 42 comprises two fixing units 44a, 44b, respectively disposed on a leg 22, 24. The fixing unit 44a, 44b again comprises a cylinder 46a, 46b, a rod system 48a, 48b connected to the cylinder 46a, here is arranged a rotatable rod 50a, 50b, the rotatable bars 50a, 50b respectively being substantially oriented parallel to, respectively. the first leg 22 and the second leg 24 of the knife holder 20.

Pa toppen af fastgorelsesstederne 28, 30, 32 og 34 har hver stang 50a, 50b holdeelementer i form af holdeklapper 52 (se fig. 1).At the top of the fastening points 28, 30, 32 and 34 each rod 50a, 50b has retaining elements in the form of holding flaps 52 (see Fig. 1).

Flvis de forskydelige tapper 28, 32 befinder sig i en ikke-fastspaendt, dvs. ulast position, er afstanden mellem hvert fastgorelsesstedpar hhv. 28, 34 og 30, 32 udformet for at optage en skaerekniv 40 med tilsvarende boringer i en forste skaereposition, der er dannet af det forste fastgorelsesstedpar, respektivt i en anden skaereposition, der er dannet af det andet fastgorelsesstedpar.Some of the slidable pins 28, 32 are in a non-clamp, i.e. unloaded position, the distance between each attachment point pair is respectively. 28, 34 and 30, 32 are designed to receive a cutting knife 40 with corresponding bores in a first cutting position formed by the first attachment site pair or in a second cutting position formed by the second attachment site pair.

Hvis skaerekniven 14 befinder sig i den forste fastgorelsesposition som ek-sempelvis i fastgorelsesstederne 28 og 34 af det forste fastgorelsesstedpar, aktiveres cylindrene 38a, 38b ved hjaelp af en ikke-vist styreindretning og udo-ver en kraft pa den pagaeldende loftearm hhv. 40a og 40b. Loftearmene 40a, 40b svinges, saledes at hhv. tappen 28 og 32, som er forbundet med hhv. loftearmen 40a og 40b, forskydes. Herved fastspaendes skaerekniven i sin langsgaende akse i skaereindretningen 10.If the cutting knife 14 is in the first fixing position as, for example, in the fastening points 28 and 34 of the first fastening place pair, the cylinders 38a, 38b are actuated by means of a control device (not shown) and exert a force on the attic arm respectively. 40a and 40b. The loft arms 40a, 40b are pivoted, thus, respectively. pins 28 and 32, which are connected respectively to the ceiling arm 40a and 40b are displaced. Hereby, the cutting knife is secured in its longitudinal axis in the cutting device 10.

Uafhaengigt af cylindrene 38a, 38b for spaendeindretningen 36, men naesten samtidig bliver cylindrene 46a, 46b for knivfikseringsindretningen 42 aktiveret ved hjaelp af den ikke viste styreindretning. Cylindrene 46a, 46b for knivfikseringsindretningen 42 indvirker pa det pagaeldende stangsystem 48a, 48b pa en sadan made, at staengerne 50a, 50b drejer respektivt fra deres udgangs-position om en forudbestemt vinkel til en holdeposition. Dette medforer, at hol-deklapperne 52, som er anbragt pa staengerne 50a, 50b, udefra rettes mod skaerekniven 14, saledes at skaerekniven 14 holdes sikkert i hhv. tappen 28 og bolten 34.Independently of the cylinders 38a, 38b of the clamping device 36, but almost simultaneously the cylinders 46a, 46b of the knife fixing device 42 are actuated by the control device not shown. The cylinders 46a, 46b of the knife fixing device 42 act on the rod system 48a, 48b in such a manner that the rods 50a, 50b respectively rotate from their starting position about a predetermined angle to a holding position. This causes the hollow flaps 52, which are placed on the rods 50a, 50b, to be directed from the outside to the cutting knife 14, so that the cutting knife 14 is held securely in, respectively. pin 28 and bolt 34.

Afstanden mellem hhv. det forste ben 22 og det andet ben 24 og holdeklap-perne 52 i holdepositionen er mindre end tykkelsen pa skaerekniven 14. Skaerekniven 14 skal ved hjaelp af holdeklapperne 52 sikres mod, at den forskydes vinkelret pa skaereplanet, og saledes sikres mod, at den falder ud af fastgorel-sesstederne 28, 34. Men forst og fremmest anvendes holdeklapperne 52 til at udove et tryk pa skaerekniven 14 for at stabilisere kniven vridningsstift i kniv-holderen 20.The distance between respectively. the first leg 22 and the second leg 24 and the holding flaps 52 in the holding position are less than the thickness of the cutting knife 14. By means of the holding flaps 52, the cutting knife 14 must be secured against being displaced perpendicular to the cutting plane and thus secured against falling but first and foremost, the holding flaps 52 are used to exert a pressure on the cutting knife 14 to stabilize the knife twisting pin in the knife holder 20.

For at fjerne skaerekniven 14 fra sin skaereposition igen drejes knivfiksering-sindretningens 42 staenger 50a, 50b til udgangspositionen, herved svinges holdeklapperne 52 vaek fra fastgorelsesstederne 28 og 34, saledes at skaerekniven 14 er tilgaengelig. Holdeklapperne 52 skal saledes svinges om en vinkel, som gordet muligt atljerne skaerekniven 14 igen fra fastgorelsesstederne 28 og 34.In order to remove the cutting knife 14 from its cutting position again, the rods 50a, 50b of the knife fixing device 42 are rotated to the starting position, whereby the holding flaps 52 are pivoted away from the fixing points 28 and 34, so that the cutting knife 14 is available. The retaining flaps 52 must thus be pivoted at an angle which allows the cutter knife 14 to retract again from the fastening points 28 and 34.

Uafhaengigt af staengernes 50a, 50b svingbevaegelse svinges loftearmene 40a og 40b til deres ikke-fastspaendte stilling igen, saledes at den forskydelige tap 28 kan vende tilbage til sin ikke-fastspaendte position, hvori en fjernelse af skaerekniven 14 fra de to fastgorelsessteder 28, 34 er mulig.Regardless of the pivotal movement of the rods 50a, 50b, the ceiling arms 40a and 40b are pivoted back to their non-clamped position so that the displaceable pin 28 can return to its non-clamped position wherein a removal of the cutting knife 14 from the two fixing points 28, 34 is possible.

Nu kan skaerekniven 14 udskiftes med en ny skaerekniv, vendes eller anbrin-ges i den anden skaereposition.Now the cutting knife 14 can be replaced with a new cutting knife, turned or placed in the second cutting position.

For at anbringe skaerekniven i den anden skaereposition, hvor den er fastgjort i den forskydelige tap 32 og bolten 30, aktiveres skaereindretningen 36 pa samme made som beskrevet ovenfor. Tappen 32 af det andet fastgorelses-stedpar forskydes ved hjaelp af loftearmen 40b for at fastspaende skaerekniven 14, og holdeklapperne 52 pa de drejelige staenger 50a, 50b svinges, saledes at skaerekniven 14 kan holdes sikkert i den anden skaereposition. I den viste udforelsesform aktiveres cylinderne 38a, 38b ved hjaelp af et faelles aktiveringselement, saledes at loftearmene 40a, 40b og dermed hhv. tapperne 28 og 32 aktiveres synkront. Dette betyder, at ogsa tappen 32 eller 28, som ingen kniv baerer, aktiveres ved fastspaending af en kniv.In order to place the cutting knife in the second cutting position, where it is fixed in the displaceable pin 32 and the bolt 30, the cutting device 36 is actuated in the same manner as described above. The pin 32 of the second fixing-place pair is displaced by the ceiling arm 40b to secure the cutting knife 14, and the holding flaps 52 of the pivotal bars 50a, 50b are pivoted, so that the cutting knife 14 can be held securely in the second cutting position. In the embodiment shown, the cylinders 38a, 38b are actuated by means of a common actuating element, so that the ceiling arms 40a, 40b and thus respectively. pins 28 and 32 are activated synchronously. This means that also the pin 32 or 28, which no knife carries, is activated by clamping a knife.

Imidlertid kan cylindrene 38a, 38b i en anden udforelsesform ogsa styres uaf-haengigt af hinanden, saledes at respektivt kun tappen 28 eller 32, der holder kniven, forskydes.However, in another embodiment, the cylinders 38a, 38b can also be independently controlled so that only the pin 28 or 32 holding the knife can be displaced, respectively.

Figurerne 4 til 8 viser en anden udforelsesform af en skaereindretning 110 med en skaereenhed 112, som har en knivholder 120, hvor boltene 128, 130 er anbragt pa det forste ben 122, og de forskydelige tapper 132, 134 er anbragt pa det andet ben 124. Bolten 128 og den forskydelige tap 134 udgor et forste fastgorelsesstedparog stiller dermed en forste skaereposition til radighed. Bolten 130 og den forskydelige tap 132 udgor et andet fastgorelsesstedpar og stiller dermed en anden skaereposition til radighed.Figures 4 to 8 show another embodiment of a cutting device 110 having a cutting unit 112 having a knife holder 120, where the bolts 128, 130 are placed on the first leg 122 and the sliding pins 132, 134 are placed on the second leg 124 The bolt 128 and the displaceable pin 134 constitute a first attachment point pair thus providing a first cutting position. The bolt 130 and the displaceable pin 132 constitute a second attachment point pair and thus provide a different cutting position.

Afstanden mellem bolten 128 og den forskydelige tap 134 af det forste fastgorelsesstedpar svarer til afstanden mellem bolten 130 og den forskydelige tap 132 af det andet fastgorelsesstedpar for at fastgore en og samme skaerekniv i begge skaerepositioner.The distance between the bolt 128 and the displaceable pin 134 of the first attachment point pair corresponds to the distance between the bolt 130 and the displaceable pin 132 of the second attachment pin pair to secure one and the same cutting knife in both cutting positions.

Desuden erfastgorelsesstederne 128,130,132,134 iforhold til knivholderens 120 midterplan, isaer i forhold til de indvendige sider af de to ben 122, 124 orienteret spejlsymmetrisk og ligger i et plan parallelt med skaereplanet.In addition, the attachment points 128,130,132,134 are relative to the median plane of the knife holder 120, especially with respect to the inner sides of the two legs 122, 124 oriented symmetrically and lying in a plane parallel to the cutting plane.

Spaendeindretningen 136, ved hjaelp af hvilken de to forskydelige tapper 132, 134 er forskydelige, omfatter en cylinder 138, som er anbragt langs benet 124, hvorpa de forskydelige tapper 132,134 er tilvejebragt, et led 158 og en excen-trisk aksel 160, som erforbundet med leddet 158.The clamping device 136, by means of which the two displaceable pins 132, 134 are displaceable, comprises a cylinder 138 disposed along the leg 124, on which the displaceable pins 132,134 are provided, a joint 158 and an eccentric shaft 160 which is connected with the joint 158.

De forskydelige tapper 132, 134 er monteret drejeligt, hvor der pa hver forsky-delig tap 132, 134 vinkelret pa en drejeakse er anbragt en stift 162, 164, som vekselvirker med den excentriske aksel 160.The displaceable pins 132, 134 are rotatably mounted, with on each movable pin 132, 134 perpendicular to a pivot axis a pin 162, 164, which interacts with the eccentric shaft 160.

Endvidere er der tilvejebragt en knivfikseringsindretning 142. Knivfiksering-sindretningen 142 omfatter to fikseringsenheder 144a, 144b med respektivt en cylinder 146a, 146b, et drejeligt stangsystem 148a, 148b og med en drejelig stang 150a, 150b, som er anbragt vinkelret pa det drejelige stangsystem 148a, 148b, hvor de drejelige staenger 150a, 150b er orienteret respektivt i det vae-sentlige parallelt med hhv. det forste ben 122 og det andet ben 124 af knivhol-deren 120.Further, there is provided a knife fixing device 142. The knife fixing device 142 comprises two fixing units 144a, 144b, respectively, with a cylinder 146a, 146b, a rotatable rod system 148a, 148b and with a rotatable rod 150a, 150b disposed perpendicular to the rotatable rod system 148 148b, wherein the rotatable bars 150a, 150b are oriented respectively substantially substantially parallel to, respectively. the first leg 122 and the second leg 124 of the knife holder 120.

De to cylindre 146a, 146b er anbragt over knivholderens base 126 langs basen 126.The two cylinders 146a, 146b are positioned above the base of the knife holder 126 along the base 126.

Pa toppen af fastgorelsesstederne 128, 130, 132 og 134 har hver stang 150a, 150b holdeelementer i form af holdeklapper 152.At the top of the fastening points 128, 130, 132 and 134 each rod 150a, 150b has retaining elements in the form of holding flaps 152.

Hvis skaerekniven er anbragt i sin onskede skaereposition, aktiveres skaereind-retningen 136 ved hjaelp af en ikke vist styreindretning, og cylinderen 138 aktiveres derved. Cylinderen 138 indvirker pa leddet 158 og drejer den excentriske aksel 160, saledes at stifterne 162, 164 forskyder de forskydelige tapper 132, 134 opad eller nedad i retning af benenes akse. En skaerekniv, som be-finder sig i den forste eller anden skaereposition, bliver dermed fastspaendt.If the cutting knife is placed in its desired cutting position, the cutting device 136 is activated by means of a control device (not shown) and the cylinder 138 is thereby activated. Cylinder 138 acts on link 158 and rotates eccentric shaft 160 such that pins 162, 164 displace slidable pins 132, 134 up or down in the direction of the leg axis. A cutting knife that is in the first or second cutting position is thus clamped.

Uafhaengigt af spaendeindretningens 136 cylinder 138, men omtrent samtidig bliver knivfikseringsindretningens 142 cylindre 146a, 146b aktiveret af den ikke viste styreindretning. Cylindrene 146a, 146b af knivfikseringsindretningen 142 indvirker pa stangsystemet 148a, 148b pa en sadan made, at staengerne 150a, 150b drejer respektivt fra deres udgangsposition om en forudbestemt vinkel til en holdeposition, hvor skaerekniven 114 holdes sikkert i tapperne 132, 134 respektivt i boltene 128 respektivt 130.Independently of the cylinder 138 of the tensioning device 136, but at approximately the same time, the cylinders 146a, 146b of the knife fixing device 142 are actuated by the control device not shown. The cylinders 146a, 146b of the knife fixing device 142 act on the rod system 148a, 148b in such a way that the rods 150a, 150b respectively rotate from their starting position to a predetermined angle to the holding position where the cutting knife 114 is securely held in the pins 132, 134 and the bolts 128 respectively. 130 respectively.

For at fjerne skaereknivene fra skaereindretningen 112 skal man ga til vaerks i omvendt retning. I stedet for en hydraulisk eller pneumatisk aktiveret speende- eller knivfikse-ringsindretning kan der ogsa anvendes speende- eller knivfikseringsindretnin-ger, som kan aktiveres pa anden made, f.eks. elektrisk.To remove the cutting blades from the cutting device 112, work must be carried in the reverse direction. Instead of a hydraulically or pneumatically actuated weaning or knife fixing device, weaning or knife fixing devices can also be used which can be activated in a different way, e.g. electric.

Claims

A cutting device comprising a cutting unit with a substantially U-shaped knife holder (20; 120), which can be lowered in the cutting direction (12; 112), with a first and a second leg (22, 24; 122, 124) and a clamping device for securing a cutting knife (14; 114) to the knife holder (20; 120), where on each leg (22, 24; 122, 124) of the knife holder (20; 120) is provided a fastening point (28, 30, 32, 34; 128, 130, 132, 134) for readable recording of a cutting knife (14; 114), characterized in that each leg (22, 24; 122; 124) is provided two fastening points (28, 30, 32, 34; 128, 130, 132, 134), respectively, where a fastener (28, 30; 128, 130) of the first leg (22; 122) is associated with a fastener location (32, 34; 132, 134) of the second leg (24; 124) and constitutes an attachment site pair suitable for holding a cutting knife (14; 114) in a predetermined cutting position, each attachment site pair having a attachment site (28, 32; 132, 134) which is displaceable ve d using the spa device.

Cutting device according to claim 1, characterized in that the distances between the two attachment points (28, 30, 32, 34; 128, 130, 132, 134) of each attachment pair are the same.

Cutting device according to claim 1 or 2, characterized in that each attachment point pair forms a connection line between the two attachment points and the two connection lines of the attachment pair pairs intersect within the U-shaped knife holder (20; 120).

Cutting device according to one of the preceding claims, characterized in that the fixing points (28, 30, 32, 34; 128, 130, 132, 134) relative to the median plane of the knife holder (20; 120) are arranged symmetrically on it. first and second legs (22, 24; 122, 124) of the knife holder (20; 120).

Cutting device according to one of the preceding claims, characterized in that each pair of fastening points has a slidable fastening point (28, 32; 132, 134) in the form of a slidable pin and a non-slidable fastening point (30, 34; 128, 132). in the form of a rigid bolt.

Cutting device according to one of the preceding claims, characterized in that the sliding fastening points (28, 32; 132,134) of the fastening point pairs can be activated by means of a common clamping device.

Cutting device according to one of the preceding claims, characterized in that the displaceable fastening point (28) of a first fastening point pair is provided on the first leg (22) of the knife holder (20) and the displaceable fastening point (32) of a a second attachment point pair is provided on the second leg (24) of the knife holder (20).

Cutting device according to one of claims 1 to 6, characterized in that the slidable fastening point (132) of a first fastening point pair is provided on one leg (124) of the knife holder (120) and the slidable fastening point (134) of a second fastening point pair is provided on the same leg (124) of the knife holder (120) as the displaceable attachment point (132) of the first attachment point pair.

Cutting device according to one of the preceding claims, characterized in that the clamping device (36) has a ceiling device (38) and the displaceable fastening point (28) of a first fastening point pair and the slidable fastening point (32) of a second fastening point pair can actuated by means of the ceiling device (38).

Cutting device according to one of the preceding claims, characterized in that the clamping device has an eccentric shaft (160) and the displaceable fastening point (134) of a first fastening point pair and the slidable fastening point (132) of a second fastening point pair can actuated by the eccentric shaft (160).

Cutting device according to one of the preceding claims, characterized in that the clamping device has retaining means (52; 152) for the cutting knife (14; 114).

A cutting device according to any one of the preceding claims comprising a cutting knife having at least two bores, wherein the attachment points (28, 30, 32, 34; 128, 130, 132, 134) of a fastening point pair enter through the cutting knife bores.