EP3854550B1 - Quick connector for a blade of a cutting machine - Google Patents

Quick connector for a blade of a cutting machine 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
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EP
European Patent Office
Prior art keywords
knife
insertion channel
securing
securing means
blade
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EP21151859.2A
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German (de)
French (fr)
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EP3854550A1 (en
EP3854550C0 (en
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
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Bullmer GmbH
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Publication of EP3854550A1 publication Critical patent/EP3854550A1/en
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Publication of EP3854550C0 publication Critical patent/EP3854550C0/en
Publication of EP3854550B1 publication Critical patent/EP3854550B1/en
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    • 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.

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

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Verbindung eines Messers für den Einzel- oder Mehrlagenzuschnitt von flächig gelegtem biegeschlaffem Material mit dem Schneidkopf einer Zuschnittmaschine, umfassend einen Stößel, welcher eine Messeraufnahme, sowie dieser gegenüberliegende Verbindungsmittel zur Verbindung des Stößels mit dem Schneidkopf aufweisen, wobei die Messeraufnahme einen Einführkanal zur Aufnahme eines Messerschafts mit einer Auskehlung, aufweist und der Messeraufnahme Sicherungsmittel zugeordnet sind, wobei ferner ein Sicherungsmittel in Form eines Sicherungsrings vorgesehen ist.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.

Eine derartige Vorrichtung ist bereits im Stand der Technik, nämlich aus der EP 1 719 569 A1 , vorbekannt. Dieses Dokument offenbart eine Verklemmung einer Klinge an einer seitlichen Klemmfläche, welche mithilfe von Verzahnungen verstellbar ist.Such a device is already in the prior art, namely from EP 1 719 569 A1 , previously known. This document discloses a blade being clamped on a lateral clamping surface, which can be adjusted with the aid of toothing.

Weiter ist im Stand der Technik die Offenbarung der ähnlichen Schriften US 2009/071016 A1 und DE 198 19 528 A1 , sowie der US 8,813,372 B2 und der DE 40 09 911 A1 , bekannt. Insbesondere werden bei letzteren Zuschnittmaschinen bislang Messer verwendet, welche in ihrem Messerschaft Bohrungen zur Befestigung an einem Stößel aufweisen. Hierüber kann eine lösbare, aber sehr haltbare Befestigung mit einem durchaus überschaubaren Aufwand hergestellt werden.Further in the prior art is the disclosure of similar references U.S. 2009/071016 A1 and DE 198 19 528 A1 , as well as the U.S. 8,813,372 B2 and the DE 40 09 911 A1 , known. In particular, in the case of the latter cutting machines, knives have hitherto been used which have bores in their knife shank for attachment to a ram. About this can be a solvable, but very durable attachment can be produced with a quite manageable effort.

Jedoch kann es je nach Material, welches zum Zuschnitt ansteht, zu einem häufigen Wechsel der Klingen kommen. Ferner ist es erforderlich, dass die verwendeten Klingen sehr scharf sind, so dass der Umgang damit auf ein Minimum reduziert werden sollte, um Verletzungen möglichst weitgehend ausschließen zu können. Dies kann jedoch bei der Verwendung einer Verschraubung am Messerschaft nicht gelingen, da es erforderlich ist, das Messer über eine längere Zeit an Ort und Stelle zu halten, bis die üblicherweise mehreren Schrauben platziert sind. Zudem ist es komplex, gleichzeitig das Messer, die Schrauben und ein Schraubwerkzeug wie einen Schraubendreher oder einen Akkuschrauber in Position zu halten.However, depending on the material to be cut, 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.

Schließlich dauert eine solche Verschraubung einige Zeit, sowohl für das Lösen der zu ersetzenden Klinge als auch für das Befestigen einer neuen, so dass die Rüstzeiten für eine mit dem bekannten System versorgte Zuschnittmaschine verhältnismäßig hoch sind.Finally, such a screw connection takes some time, both for loosening the blade to be replaced and for attaching a new one, so that the set-up times for a cutting machine supplied with the known system are relatively high.

Vor diesem Hintergrund liegt der vorliegenden Erfindung die Aufgabe zugrunde, eine Verbindung eines Messers für den Einzel- oder Mehrlagenzuschnitt zu erleichtern und gleichzeitig die Rüstzeit hierfür zu senken.Against this background, 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.

Dies gelingt durch eine Vorrichtung zur Verbindung eines Messers für den Einzel- oder Mehrlagenzuschnitt von flächig gelegtem biegeschlaffem Material mit dem Schneidkopf einer Zuschnittmaschine gemäß den Merkmalen des unabhängigen Anspruchs 1. Weitere, sinnvolle Ausgestaltungen einer solchen Vorrichtung können den sich anschließenden, abhängigen Ansprüchen entnommen werden.This is achieved by 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 according to the features of independent claim 1. Further useful configurations of such a device can be found in the subsequent dependent claims.

Erfindungsgemäß ist es vorgesehen, dass ähnlich dem Stand der Technik ein Messer über einen Stößel mit einem Schneidkopf verbunden wird. Im Unterschied zum Stand der Technik erfolgt die Befestigung des Messers an dem Stößel jedoch nicht über eine Verschraubung, sondern vielmehr über einen Schnellverbinder. Dieser sieht eine Messeraufnahme mit einem Einführkanal zur Aufnahme eines Messerschafts vor. In diesen Einführkanal, welcher bevorzugtermaßen formschlüssig mit der Klinge zusammenwirkt, so dass ein Verdrehen der Klinge in dem Einführkanal verhindert wird, erfolgt dann, vorzugsweise in einer Anschlagsposition, eine Fixierung des Messers. Die Fixierung erfolgt aufgrund eines Sicherungsmittels, welches in eine Queröffnung eingeschoben werden kann, welche den Einführkanal kreuzt. Hierbei sind unterschiedliche Formen sowohl des Einführkanals als auch der Queröffnung und damit auch der Sicherungsmittel möglich.According to the invention, it is provided that, similar to the prior art, a knife is connected to a cutting head via a ram. In the difference according to the prior art, however, 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.

Aufgrund dieser Konfiguration kann durch einen Einschub des Sicherungsmittels in die Queröffnung das Messer in der Einführöffnung fixiert werden, wenn das Sicherungsmittel bis zur Kreuzung zwischen Einführkanal und Queröffnung durchgeschoben wird. Die Fixierung selbst kann hierbei sowohl durch Kraft- als auch durch Formschluss erreicht werden. In Kombination mit einer formschlüssigen und möglichst spielfreien Aufnahme des Messerschafts in dem Einführkanal erfolgt eine stabile Fixierung, welche auch bei einer starken Belastung des Messers bei mehreren Materiallagen und robustem Material eine exakte Führung erlaubt. Da lediglich ein Einschieben des Sicherungsmittels in die Queröffnung erforderlich ist, kann auch eine schnelle und einfache Bedienung erfolgen.Because of this configuration, 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. In combination with a form-fitting accommodation of the knife shank in the insertion channel that is as free of play as possible, 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.

In bevorzugter Ausgestaltung kann der Einführkanal als Schlitzaufnahme ausgebildet sein, in welchen ein flacher Messerschaft einführbar ist. Hierbei handelt es sich um eine vorteilhafte, leicht herstellbare Form des Messers, welches bis auf die Fase im Wesentlichen flächig gebildet ist. Ein schlitzförmiger Einführkanal in der Messeraufnahme kann zudem verhältnismäßig leicht und sehr präzise hergestellt werden.In a preferred embodiment, 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.

Das wenigstens eine Sicherungsmittel wird zudem dadurch weitergebildet, dass es mithilfe einer Druckfeder in der Queröffnung gehalten ist. Hierdurch kann es gegen die Kraft der Druckfeder betätigt werden und rückt nach dem Loslassen aufgrund der Federkraft wieder in die Ausgangslage zurück. Abgesehen davon, dass sich so ein unverlierbares Sicherungsmittel realisieren lässt, sorgt eine solche Konstruktion dafür, dass das Sicherungselement mit seinem Sicherungsabschnitt nach dem Betätigen wieder selbsttätig in eine Eingriffsposition zurückfindet und dort sicher gehalten wird. Neben dem Sicherungsabschnitt, welcher zumindest anteilig in die Kreuzung zwischen Einführkanal und Queröffnung eingreift, weist ein Sicherungsmittel mit einigem Vorteil ein Betätigungsmittel auf, welches der Benutzer mit der Hand betätigen kann, um das Sicherungsmittel von einer Eingriffsposition in eine Ausweichposition zu verbringen.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. Apart from the fact that 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. In addition to the securing section, which engages at least partially in the intersection between the insertion channel and the transverse opening, 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.

Dabei ist es besonders bevorzugt, wenn die Formgebung und die Bewegungsspielräume des Sicherungsmittels so gewählt sind, dass die Sicherungsmittel bei einer Druckbetätigung bis aus dem Bereich des Einführkanals ausrücken, jedoch gleichzeitig die Queröffnung nicht verlassen können.It is particularly preferred if 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.

Bei dem Sicherungsmittel handelt es sich hierbei um ein Sicherungsring. Ein solcher Sicherungsring kann hierbei um die Messeraufnahme herumgelegt und dadurch unverlierbar an dieser befestigt sein. Die Queröffnung ist als Querschlitz angelegt, insbesondere dergestalt, dass sie eine in die Messeraufnahme bis in den Einführkanal hinein seitlich eingebrachte Auskehlung oder Kerbe darstellt, sodass der Sicherungsring auf diese Weise in diese Auskehlung eingeschoben werden kann und so in Kontakt mit einem in dem Einführkanal aufgenommenen Messerschaft gerät. Weist idealerweise der Messerschaft ebenfalls eine korrespondierende, mit dem Querschlitz deckungsgleiche Auskehlung auf, so wird das Messer durch das Einschieben des Sicherungsmittels bis in die Auskehlung hinein gehalten.The securing means is a securing ring. Such 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.

Dabei kann der Sicherungsring mit besonderem Vorteil an seiner von der Queröffnung abgewandten Seite eine Druckfläche aufweisen, welche in konkreter Ausgestaltung mit einem Sicherungsabschnitt zu einem Ring ergänzt werden kann. Die beiden Teile können in herkömmlicher Weise um den Stößel herum gelegt und dann miteinander verbunden, etwa verklebt, vernietet oder verschraubt oder anderweitig verbunden werden. Durch einen Druck auf die Druckfläche wird der Sicherungsring, vorzugsweise gegen die Kraft einer zwischen der Druckfläche und der Messeraufnahme eingefügten Druckfeder, aus dem Einführkanal und damit aus der Auskehlung eines eingelegten Messerschafts herausgedrückt und gibt das Messer zur Entnahme aus dem Einführkanal frei.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.

Um eine weiter verbesserte Zentrierung des Messers in dem Einführkanal zu erreichen, wird dem Sicherungsabschnitt an seiner Kontaktstelle zu dem Messerschaft eine Zentriervertiefung zugeordnet. Die Zentriervertiefung sorgt dafür, dass der Sicherungsabschnitt des Sicherungsrings neben einer Einschränkung der Beweglichkeit des Messerschafts in Längsrichtung des Einführkanals auch eine seitliche Stabilität hinzugefügt wird, da die an eine Auskehlung des Messerschafts angrenzenden Materialflanken hierdurch wieder ihrerseits in den Zentriervertiefungen des Sicherungsabschnitts eingeschoben werden. Dies verbessert nochmals die seitliche Stabilität des Messers in der Messeraufnahme.In order to achieve a further improved centering of the knife in 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.

Die vorstehend beschriebene Erfindung wird im Folgenden anhand eines Ausführungsbeispiels näher erläutert.The invention described above is explained in more detail below using an exemplary embodiment.

Es zeigen

Figur 1
einen Schnellverbinder mit einem Stößel mit Messeraufnahme und eingelegtem Messer in perspektivischer Darstellung,
Figur 2
den Schnellverbinder gemäß Figur 1 in seitlicher Querschnittsdarstellung,
Figur 3
ein ringförmiges Sicherungsmittel in einer Querschnittsdarstellung von oben, sowie
Figur 4
eine Draufsicht auf einen Sicherungsabschnitt des ringförmigen Sicherungsmittels gemäß Figur 3 von oben.
Show it
figure 1
a perspective view of a quick connector with a plunger with knife holder and inserted knife,
figure 2
according to the quick connector figure 1 in lateral cross-section,
figure 3
an annular securing means in a cross-sectional view from above, and
figure 4
a plan view of a securing section of the annular securing means according to FIG figure 3 from above.

Figur 1 zeigt einen Schnellverbinder, mit dem ein Messer 11 mit einer Zuschnittmaschine für den Einzel- oder Mehrlagenzuschnitt von flächig gelegtem biegeschlaffem Material, wie etwa Leder, gewebte Stoffe, Filze und dergleichen mehr verbunden werden kann. Bei derartigen Zuschnittmaschinen werden Messer 11 über einem Borstenband auf und ab bewegt, auf welchem die Materiallagen einzeln oder gestapelt zum Zuschnitt ausgelegt sind. Ein Schneidkopf, an welchem das Messer 11 befestigt ist und welcher hier nicht näher gezeigt ist, fährt die gewünschten Konturen ab und trennt hierbei die gewünschten Zuschnitte aus dem Material heraus. Um die Rüstzeiten der Zuschnittmaschine zu verkürzen und die Handhabung zu vereinfachen, weist ein mit dem Schneidkopf über Verbindungsmittel 3 zu verbindender Stößel 1 eine Messeraufnahme 2 auf, in welche ein Einführkanal 4 einbeschrieben ist. Dieser ist aufgrund der flachen Form des Messerschafts 12 des Messers 11 ebenfalls in Form eines flachen Streifens gebildet, so dass der Messerschaft 12 leicht, aber weitestgehend spielfrei in den Einführkanal 4 eingeführt werden kann. figure 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. In such cutting machines, 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 cutting head, to which the knife 11 is attached and which is not shown in detail here, follows the desired contours and cuts the desired blanks out of the material. In order to shorten the set-up times of the cutting machine and to simplify handling, 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.

Um den Messerschaft 12 und mit diesem das Messer 11 in dem Einführkanal 4 der Messeraufnahme 2 zu halten, weist die Messeraufnahme 2 eine Queröffnung 5 auf, welche als Einkerbung in die Messeraufnahme 2 gebildet ist. Hierbei beginnt die Einkerbung an einer Außenfläche der hier rund ausgebildeten Messeraufnahme 2 und reicht so weit in diese hinein, dass die Queröffnung 5 den Einführkanal 4 kreuzt. Es entsteht hierdurch ein gemeinsamer Hohlraum, in welchen nach dem Einführen eines Messers 11 ein Sicherungsmittel 6 eingeschoben werden kann, welches ein Herausrutschen des Messers 11 verhindert. Das Sicherungsmittel 6 kann über eine Druckfläche 10 betätigt werden, wodurch das Sicherungsmittel 6 aus der Queröffnung 5 herausgeschoben wird und dadurch das Messer freigibt. Das hierdurch in Einschubrichtung des Einführkanals 4 nicht mehr gesicherte Messer 11 kann anschließend nach unten aus dem Einführkanal 4 entnommen werden.In order to hold the knife shank 12 and with it the knife 11 in the insertion channel 4 of the knife holder 2 , the knife holder 2 has a transverse opening 5 which is formed as a notch in the knife holder 2 . Here, 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 . This creates a common cavity into which, after the insertion of a knife 11, a securing means 6 can be inserted, which prevents the knife 11 from slipping out. 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.

Dieser Ablauf kann in Figur 2 nochmals besser nachvollzogen werden. Es zeigt sich dort, dass der Messerschaft 12 eine Auskehlung 14 aufweist, welche sich in Deckung mit der Queröffnung 5 befindet. Hierdurch kann das Sicherungsmittel 6 durch die Queröffnung 5 bis in die Auskehlung 14 hineingeschoben werden und verhindert dadurch, dass das Messer 11 in Richtung des Einführkanals 4 verschoben werden kann. Im Einzelnen handelt es sich bei dem Sicherungsmittel 6 um einen Sicherungsring, welcher um die Messeraufnahme 2 herumgelegt ist. Auf seiner von der Queröffnung 5 abgewandten Seite weist das Sicherungsmittel 6 eine Druckfläche 10 auf, welche durch einen Benutzer mit manuellem Druck betätigt werden kann. Ein solcher Druck auf die Messeraufnahme 2 hin staucht die Druckfeder 9 und schiebt gegen die Kraft der Druckfeder 9 das Sicherungsmittel 6 aus dem Bereich des Einführkanals 4 hinaus. Dadurch gerät das Sicherungsmittel 6 außer Eingriff der Auskehlung 14 und das Messer 11 kann aus dem Einführkanal 4 entnommen werden.This process can figure 2 be better understood. It can be seen there that the knife shank 12 has a groove 14 which is in alignment with the transverse opening 5 . As a result, 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 . In detail, the securing means 6 is a securing ring which is placed around the knife holder 2 . 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 . As a result, the securing means 6 disengages from the recess 14 and the knife 11 can be removed from the insertion channel 4 .

Das Sicherungsmittel 6 ist im Einzelnen nochmals in der Figur 3 dargestellt, wo zu erkennen ist, dass die Form des Sicherungsmittels 6 für dessen Unverlierbarkeit an dem Stößel 1 sorgt. Zum einen ist die Messeraufnahme 2 im Bereich des Sicherungsmittels 6 seitlich gekerbt, so dass das Sicherungsmittel 6 nach oben oder unten nicht abrutschen kann. Weiter stützt sich das Sicherungsmittel 6 mittels einer Druckfeder 9 gegen die Messeraufnahme 2 ab, so dass das Sicherungsmittel 6 nach einem Loslassen der Druckfläche 10 wieder in seine Eingriffsposition in den Einführkanal 4 zurückkehrt.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. On the one hand, 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. Furthermore, 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.

Ebenfalls ist gezeigt, dass das Sicherungsmittel 6 aus einem Sicherungsabschnitt 7 gebildet ist, welcher mit der Druckfläche 10 verbunden, hier verschraubt ist. Der Sicherungsabschnitt 7 als separates Element wird in Figur 4 nochmals näher betrachtet. In der Draufsicht ist erkennbar, dass dem Sicherungsabschnitt 7 an seiner mit der Auskehlung 14 des Messers 11 in Kontakt tretenden Bogenbereich eine Zentriervertiefung 8 aufweist. Diese sorgt dafür, dass nicht nur das Sicherungsmittel 6 in die Auskehlung 14 des Messers 11 einrückt und eine Bewegung in Einführrichtung des Einführkanals 4 unterbindet, sondern sorgt auch dafür, dass die an die Auskehlung 14 angrenzenden Flanken des Messers 11 ihrerseits in der Zentriervertiefung 8 seitlich gestützt werden. Hierdurch ist eine stabile Seitenführung des Messers 11 gewährleistet.It is also shown that 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. In the plan view it can be seen that 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 .

Vorstehend beschrieben ist somit eine Vorrichtung zur Verbindung eines Messers für den Einzel- oder Mehrlagenzuschnitt von flächig gelegtem biegeschlaffem Material mit dem Schneidkopf einer Zuschnittmaschine, welche eine Verbindung des Messers mit dem Schneidkopf erleichtern und gleichzeitig die Rüstzeit hierfür senken soll.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.

BEZUGSZEICHENLISTEREFERENCE LIST

11
Stößelpestle
22
Messeraufnahmeknife mount
33
Verbindungsmittellanyard
44
Einführkanalinsertion channel
55
Queröffnungcross opening
66
Sicherungsmittelcollateral
77
Sicherungsabschnittfuse section
88th
Zentriervertiefungcenter recess
99
Druckfedercompression spring
1010
Druckflächeprinting surface
1111
MesserKnife
1212
Messerschaftknife shaft
1313
Messerklingeknife blade
1414
Auskehlunggroove

Claims (4)

  1. Device for connecting a cutting blade (11) for single or multi-layer cutting of flat, pliable material with the cutting head of a cutting machine, comprising a tappet (1) having a blade receptacle (2) and connecting means (3) arranged opposite thereto for connecting the tappet (1) with the cutting head, wherein the blade receptacle (2) has an insertion channel (4) for receiving a blade shaft (12) having a recess (14), and securing means (6) are assigned to the blade receptacle (2), wherein further, securing means (6) in the form of a securing ring are provided,
    characterized in that the insertion channel (4) has a transverse opening (5) crossing it and that the securing ring can be inserted through the transverse opening (5) right into the insertion channel (4), wherein the transverse opening (5) is designed as a transverse slot, the securing ring is held in the transverse slot by means of a compression spring (9) in such a manner that a securing section of the securing ring projects into the insertion channel and that at least one centering recess (8) is assigned to the securing ring on its side where it projects into the insertion channel (4).
  2. The device according to claim 1, characterized in that the insertion channel (4) is designed as a slotted recess into which a flat blade shaft (12) can be inserted.
  3. The device according to claims 1 or 2, characterized in that the securing means can be pressed out of the insertion channel against the force of the compression spring, but not out of the transverse opening.
  4. The device according to one of the proceeding claims, characterized in that the securing ring has a pressure surface (10), at least on the side facing away from the transverse opening (5), for pressure actuation of the securing means (6).
EP21151859.2A 2020-01-22 2021-01-15 Quick connector for a blade of a cutting machine Active EP3854550B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020101412.0A DE102020101412A1 (en) 2020-01-22 2020-01-22 Quick connector for a knife of a cutting machine

Publications (3)

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

Family

ID=74186506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21151859.2A Active EP3854550B1 (en) 2020-01-22 2021-01-15 Quick connector for a blade of a cutting machine

Country Status (2)

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

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 (en) 1970-06-02 1970-09-17 Krauss & Reichert Maschf FABRIC CUTTING MACHINE.
DE4009911A1 (en) 1990-03-28 1990-10-31 Kurt Dipl Ing Spiegelmacher Cutting soft webs of material - by two=dimensional oscillation of outer blade
DE19819528A1 (en) * 1998-04-30 1999-11-04 Scintilla Ag Hand-held machine tool with quick-action tool chuck
EP1719569A1 (en) * 2005-05-03 2006-11-08 Metabowerke GmbH Device for clamping a reciprocating tool and apparatus provided with such a device
US8813372B2 (en) 2007-09-14 2014-08-26 Milwaukee Electric Tool Corporation Blade clamp mechanism

Also Published As

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

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