EP3854550B1 - Connecteur rapide pour un couteau de machine à découper - Google Patents

Connecteur rapide pour un couteau de machine à découper Download PDF

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Publication number
EP3854550B1
EP3854550B1 EP21151859.2A EP21151859A EP3854550B1 EP 3854550 B1 EP3854550 B1 EP 3854550B1 EP 21151859 A EP21151859 A EP 21151859A EP 3854550 B1 EP3854550 B1 EP 3854550B1
Authority
EP
European Patent Office
Prior art keywords
knife
insertion channel
securing
securing means
blade
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.)
Active
Application number
EP21151859.2A
Other languages
German (de)
English (en)
Other versions
EP3854550C0 (fr
EP3854550A1 (fr
Inventor
Tobias Baur
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.)
Bullmer GmbH
Original Assignee
Bullmer 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 Bullmer GmbH filed Critical Bullmer GmbH
Publication of EP3854550A1 publication Critical patent/EP3854550A1/fr
Application granted granted Critical
Publication of EP3854550B1 publication Critical patent/EP3854550B1/fr
Publication of EP3854550C0 publication Critical patent/EP3854550C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of 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 present invention relates to a device for connecting a knife for the single or multi-layer cutting of flat, pliable material to the cutting head of a cutting machine, comprising a ram, which has a knife holder and connecting means located opposite this for connecting the ram to the cutting head, the knife holder having an insertion channel for receiving a knife shank with a groove, and the knife holder having securing means associated therewith, a securing means in the form of a securing ring also being provided.
  • the blades may have to be changed frequently. Furthermore, it is necessary that the blades used are very sharp, so that handling them should be reduced to a minimum in order to be able to rule out injuries as far as possible. However, this cannot be achieved when using a screw connection on the knife shank, since it is necessary to hold the knife in place for a longer period of time until the usually several screws have been placed. In addition, it is complex to hold the knife, the screws and a screwing tool such as a screwdriver or a cordless screwdriver in position at the same time.
  • a screwing tool such as a screwdriver or a cordless screwdriver
  • the present invention is based on the object of facilitating the connection of a knife for single or multi-layer cutting and at the same time reducing the set-up time for this.
  • a knife is connected to a cutting head via a ram.
  • the blade is not attached to the ram by a screw connection, but rather by a quick connector.
  • This provides a knife holder with an insertion channel for receiving a knife shank.
  • the knife is then fixed, preferably in a stop position, in this insertion channel, which preferably interacts with the blade in a form-fitting manner so that the blade is prevented from twisting in the insertion channel.
  • the fixation takes place due to a securing means which can be pushed into a transverse opening which crosses the insertion channel. In this case, different forms of both the insertion channel and the transverse opening and thus also the securing means are possible.
  • the knife can be fixed in the insertion opening by inserting the securing means into the transverse opening when the securing means is pushed through to the point at which the insertion channel and transverse opening cross.
  • the fixation itself can be achieved here both by force fit and by form fit.
  • a stable fixation takes place, which allows exact guidance even when the knife is heavily loaded with several layers of material and robust material. Since the securing means only has to be pushed into the transverse opening, operation can also be quick and simple.
  • the insertion channel can be designed as a slot receptacle into which a flat knife shank can be inserted. This is an advantageous, easy-to-manufacture form of the knife, which is formed essentially flat except for the bevel. A slit-shaped insertion channel in the knife holder can also be produced relatively easily and very precisely.
  • the at least one securing means is also further developed in that it is held in the transverse opening with the aid of a compression spring. As a result, it can be actuated against the force of the compression spring and, after being released, returns to the starting position due to the spring force.
  • a captive securing means can be realized in this way, such a construction ensures that the securing element with its securing section automatically returns to an engagement position after actuation and is securely held there.
  • a securing means advantageously has an actuating means which the user can operate by hand in order to bring the securing means from an engagement position into an evasive position.
  • the shape and the freedom of movement of the securing means are selected such that the securing means move out of the area of the insertion channel when actuated by pressure, but at the same time cannot leave the transverse opening.
  • the securing means is a securing ring.
  • a securing ring can be placed around the knife holder and thus be captively attached to it.
  • the transverse opening is designed as a transverse slit, in particular in such a way that it represents a groove or notch made laterally in the knife holder up into the insertion channel, so that the safety ring can be pushed into this groove in this way and thus come into contact with a knife shank accommodated in the insertion channel. If ideally the knife shank also has a corresponding groove that is congruent with the transverse slot, then the knife is held by the insertion of the securing means right into the groove.
  • the retaining ring can have a pressure surface on its side facing away from the transverse opening, which is particularly advantageous Configuration can be supplemented with a fuse section to form a ring.
  • the two parts can be placed around the ram in a conventional manner and then connected to one another, for example glued, riveted or screwed or connected in some other way. Pressure on the pressure surface pushes the retaining ring out of the insertion channel and thus out of the groove of an inserted knife shaft, preferably against the force of a compression spring inserted between the pressure surface and the knife holder, and releases the knife for removal from the insertion channel.
  • a centering recess is assigned to the safety section at its point of contact with the knife shank.
  • the centering depression ensures that the safety section of the safety ring not only restricts the mobility of the knife shank in the longitudinal direction of the insertion channel but also provides lateral stability, since the material flanks adjoining a groove in the knife shank are thereby pushed back into the centering depressions of the safety section. This further improves the lateral stability of the knife in the knife holder.
  • FIG 1 shows a quick connector with which a knife 11 can be connected to a cutting machine for the single or multi-layer cutting of flat, pliable material such as leather, woven fabrics, felts and the like.
  • knives 11 are moved up and down over a bristle belt on which the layers of material are laid out individually or stacked for cutting.
  • a ram 1 to be connected to the cutting head via connecting means 3 has a knife receptacle 2 in which an insertion channel 4 is inscribed. Due to the flat shape of the knife shank 12 of the knife 11, this is also in the form of a flat strip, so that the knife shank 12 can be inserted into the insertion channel 4 easily, but with as little play as possible.
  • the knife holder 2 has a transverse opening 5 which is formed as a notch in the knife holder 2 .
  • the notch begins on an outer surface of the knife holder 2 , which is designed to be round here, and extends so far into it that the transverse opening 5 crosses the insertion channel 4 .
  • the securing means 6 can be actuated via a pressure surface 10, whereby the securing means 6 is pushed out of the transverse opening 5 and thereby releases the knife.
  • the knife 11 no longer secured as a result in the insertion direction of the insertion channel 4 can then be removed from the insertion channel 4 downwards.
  • the knife shank 12 has a groove 14 which is in alignment with the transverse opening 5 .
  • the securing means 6 can be pushed through the transverse opening 5 into the groove 14 and thereby prevents the knife 11 from being able to be displaced in the direction of the insertion channel 4 .
  • the securing means 6 is a securing ring which is placed around the knife holder 2 .
  • the securing means 6 On its side facing away from the transverse opening 5, the securing means 6 has a pressure surface 10, which can be actuated by a user with manual pressure.
  • Such pressure on the knife receptacle 2 compresses the compression spring 9 and pushes the securing means 6 out of the area of the insertion channel 4 against the force of the compression spring 9 .
  • the securing means 6 disengages from the recess 14 and the knife 11 can be removed from the insertion channel 4 .
  • the securing means 6 is again in detail in the figure 3 shown, where it can be seen that the shape of the securing means 6 ensures that it cannot be lost on the plunger 1.
  • the knife holder 2 is laterally notched in the area of the securing means 6, so that the securing means 6 cannot slip off upwards or downwards.
  • the securing means 6 is supported against the knife receptacle 2 by means of a compression spring 9, so that the securing means 6 returns to its engagement position in the insertion channel 4 after the pressure surface 10 has been released.
  • the securing means 6 is formed from a securing section 7 which is connected to the pressure surface 10, screwed here.
  • the fuse section 7 as a separate element is in figure 4 examined again more closely.
  • the securing section 7 has a centering recess 8 in its arcuate region which comes into contact with the recess 14 of the blade 11 . This not only ensures that the securing means 6 engages in the recess 14 of the knife 11 and prevents a movement in the direction of insertion of the insertion channel 4, but also ensures that the flanks of the knife 11 adjoining the recess 14 are in turn supported laterally in the centering recess 8. This ensures stable lateral guidance of the blade 11 .
  • the above describes a device for connecting a knife for the single or multi-layer cutting of flat, pliable material to the cutting head of a cutting machine, which is intended to facilitate connection of the knife to the cutting head and at the same time reduce the set-up time for this.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Claims (4)

  1. Dispositif pour connecter une lame de coupe (11) pour la coupe d'une ou plusieurs couches de matériaux plats et flexibles avec la tête de coupe d'une machine de coupe, comprenant un poussoir (1) ayant un réceptacle de lame (2) et des moyens de connexion (3) disposés en face de celui-ci pour connecter le poussoir (1) avec la tête de coupe, dans lequel le réceptacle de lame (2) a un canal d'insertion (4) pour recevoir un arbre de lame (12) ayant une cavité (14), et des moyens de fixation (6) sont assignés au réceptacle de lame (2), dans lequel en outre, des moyens de fixation (6) sont prévus sous la forme d'un anneau de fixation,
    caractérisé en ce que le canal d'insertion (4) est traversé par une ouverture transversale (5) et que l'anneau de fixation peut être inséré par l'ouverture transversale (5) jusque dans le canal d'insertion (4), l'ouverture transversale (5) étant conçue comme une fente transversale, l'anneau de fixation est maintenu dans la fente transversale au moyen d'un ressort de compression (9) de telle sorte qu'une section de fixation de l'anneau de fixation fasse saillie dans le canal d'insertion et qu'au moins une cavité de centrage (8) soit assignée à l'anneau de fixation sur sa face où il fait saillie dans le canal d'insertion (4).
  2. Le dispositif selon la revendication 1, caractérisé en ce que le canal d'insertion (4) est conçu comme une cavité fendue dans laquelle un arbre à lame plate (12) peut être inséré.
  3. Le dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les moyens de fixation peuvent être poussés hors du canal d'insertion, mais pas hors de l'ouverture transversale, contre la force du ressort de compression.
  4. Le dispositif selon l'une des revendications précédentes, caractérisé en ce que l'anneau de fixation présente une surface de pression (10), au moins sur le côté opposé à l'ouverture transversale (5), pour l'actionnement par pression des moyens de fixation (6).
EP21151859.2A 2020-01-22 2021-01-15 Connecteur rapide pour un couteau de machine à découper Active EP3854550B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020101412.0A DE102020101412A1 (de) 2020-01-22 2020-01-22 Schnellverbinder für ein Messer einer Zuschnittmaschine

Publications (3)

Publication Number Publication Date
EP3854550A1 EP3854550A1 (fr) 2021-07-28
EP3854550B1 true EP3854550B1 (fr) 2023-07-26
EP3854550C0 EP3854550C0 (fr) 2023-07-26

Family

ID=74186506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21151859.2A Active EP3854550B1 (fr) 2020-01-22 2021-01-15 Connecteur rapide pour un couteau de machine à découper

Country Status (2)

Country Link
EP (1) EP3854550B1 (fr)
DE (1) DE102020101412A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2305465A (en) 1941-10-16 1942-12-15 Maimin Company Inc H Cloth-cutting machine
DE7020465U (de) 1970-06-02 1970-09-17 Krauss & Reichert Maschf Stoffzuschneidemaschine.
DE4009911A1 (de) 1990-03-28 1990-10-31 Kurt Dipl Ing Spiegelmacher Schneiden mit zweidimensional oszillierendem schneidwerkzeug
DE19819528A1 (de) * 1998-04-30 1999-11-04 Scintilla Ag Handwerkzeugmaschine
EP1719569A1 (fr) * 2005-05-03 2006-11-08 Metabowerke GmbH Dispositif pour serrer un outil à mouvement alternatif et appareil muni d'un tel dispositif
US8813372B2 (en) 2007-09-14 2014-08-26 Milwaukee Electric Tool Corporation Blade clamp mechanism

Also Published As

Publication number Publication date
EP3854550C0 (fr) 2023-07-26
EP3854550A1 (fr) 2021-07-28
DE102020101412A1 (de) 2021-07-22

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