EP3854550A1 - 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
EP3854550A1
EP3854550A1 EP21151859.2A EP21151859A EP3854550A1 EP 3854550 A1 EP3854550 A1 EP 3854550A1 EP 21151859 A EP21151859 A EP 21151859A EP 3854550 A1 EP3854550 A1 EP 3854550A1
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EP
European Patent Office
Prior art keywords
knife
insertion channel
securing means
transverse opening
securing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21151859.2A
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German (de)
French (fr)
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EP3854550B1 (en
EP3854550C0 (en
Inventor
Tobias Baur
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Bullmer GmbH
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Bullmer GmbH
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Application granted granted Critical
Publication of EP3854550B1 publication Critical patent/EP3854550B1/en
Publication of EP3854550C0 publication Critical patent/EP3854550C0/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 single or multi-layer cutting of flatly laid pliable material with the cutting head of a cutting machine, comprising a ram which has a knife holder and connecting means opposite this for connecting the ram to the cutting head, the Knife holder has an insertion channel for receiving a knife shaft with a groove, as well as a transverse opening crossing this and the knife holder is assigned securing means which can be inserted through the transverse opening into the insertion channel, the transverse opening also being designed as a transverse slot in which a securing means in the form a locking ring is added.
  • the blades may be changed frequently. It is also necessary that the The blades used are very sharp, so that handling should be reduced to a minimum in order to be able to rule out injuries as far as possible.
  • this cannot be achieved when using a screw connection on the knife shaft, since it is necessary to hold the knife in place over a longer period of time until the usually several screws have been placed.
  • it is complex to hold the knife, the screws and a screwdriver such as a screwdriver or a cordless screwdriver in position at the same time.
  • 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 attachment of the knife to the ram does not take place via a screw connection, but rather via a quick connector.
  • This provides a knife holder with an insertion channel for holding a knife shaft.
  • this insertion channel which preferably interacts with the blade in a form-fitting manner, so that twisting the blade is prevented in the insertion channel, the knife is then fixed, preferably in a stop position. The fixation takes place on the basis of a securing means which can be pushed into a transverse opening which crosses the insertion channel.
  • both the insertion channel and the transverse opening and thus also the securing means are possible. Due to this configuration, by inserting the securing means into the transverse opening, the knife can be fixed in the insertion opening when the securing means is pushed through to the intersection between the insertion channel and the transverse opening.
  • the fixation itself can be achieved here by both a force fit and a form fit.
  • stable fixation takes place, which allows exact guidance even when the knife is heavily loaded with several layers of material and robust material. Since it is only necessary to push the securing means into the transverse opening, it can also be operated quickly and easily.
  • the insertion channel can be designed as a slot receptacle into which a flat knife shank can be inserted. This is an advantageous, easily producible shape of the knife, which is essentially flat except for the bevel. A slot-shaped insertion channel in the knife holder can also be produced relatively easily and very precisely.
  • the at least one securing means can also advantageously be developed in that it is held in the transverse opening with the aid of a compression spring. This enables it to be operated against the force of the compression spring and, when released, returns to its starting position due to the spring force.
  • a captive securing means can be implemented in this way, such a construction ensures that the securing element with its securing section again automatically after actuation finds its way back into an engaged position and is held there securely.
  • a securing means In addition to the securing section, which at least partially engages the intersection between the insertion channel and the transverse opening, a securing means has, with some advantage, an actuating means which the user can operate by hand in order to move the securing means from an engagement position to an evasive position. It is particularly preferred if the shape and the freedom of movement of the securing means are selected so 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.
  • a particularly preferred embodiment here is the selection of the securing means in the form of a securing ring.
  • a securing ring can in this case be placed around the knife receptacle and thus secured to it in such a way that it cannot be lost.
  • the transverse opening is designed as a transverse slot, in particular in such a way that it represents a groove or notch made laterally in the knife receptacle as far as the insertion channel, the locking ring can in this way be pushed into this groove and thus in contact with one in the insertion channel Picked up knife shaft advised.
  • the knife shaft also has a corresponding groove that is congruent with the transverse slot, the knife is held by the insertion of the securing means into the groove.
  • the securing ring can, with particular advantage, have a pressure surface on its side facing away from the transverse opening, which in a specific embodiment can be supplemented with a securing section to form a ring.
  • the two parts can be placed around the plunger in a conventional manner and then connected to one another, for example glued, riveted or screwed or otherwise connected.
  • the locking ring preferably against the force of a compression spring inserted between the pressure surface and the knife holder, is made of the Insertion channel and thus pushed out of the groove of an inserted knife shaft and releases the knife for removal from the insertion channel.
  • a centering recess can be assigned to the securing section at its contact point with the knife shaft.
  • the centering recess ensures that the securing section of the securing ring, in addition to restricting the mobility of the knife shaft in the longitudinal direction of the insertion channel, also adds lateral stability, since the material flanks adjoining a recess in the knife shaft are thereby in turn pushed into the centering recesses of the securing section. This further improves the lateral stability of the knife in the knife holder.
  • Figure 1 shows a quick connector with which a knife 11 can be connected to a cutting machine for single or multi-layer cutting of flat, pliable material such as leather, woven fabrics, felt and the like.
  • knives 11 are moved up and down over a bristle band on which the material layers 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, travels the desired contours and in doing so cuts the desired blanks out of the material.
  • a ram 1 to be connected to the cutting head via connecting means 3 has a knife holder 2 in which an insertion channel 4 is inscribed. Due to the flat shape of the knife shaft 12 of the knife 11, this is also formed in the form of a flat strip, so that the knife shaft 12 can be inserted into the insertion channel 4 easily, but largely without play.
  • the knife holder 2 In order to hold the knife shaft 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.
  • the notch begins on an outer surface of the knife holder 2, which is here round, 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, which is no longer secured as a result in the insertion direction of the insertion channel 4, can then be removed from the insertion channel 4 in a downward direction.
  • the knife shaft 12 has a groove 14 which is in congruence 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 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.
  • 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 notched laterally in the area of the securing means 6, so that the securing means 6 cannot slip up or down.
  • the securing means 6 is supported against the knife holder 2 by means of a compression spring 9, so that the securing means 6 returns to its position of engagement 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 and is screwed here.
  • the securing section 7 as a separate element is shown in Figure 4 considered again.
  • the plan view it can be seen that the securing section 7 has a centering recess 8 on its arcuate area coming into contact with the groove 14 of the knife 11. This ensures that not only the securing means 6 engages in the groove 14 of the knife 11 and prevents movement in the insertion direction of the insertion channel 4, but also ensures that the flanks of the knife 11 adjoining the groove 14 are in turn supported laterally in the centering recess 8. This ensures stable lateral guidance of the knife 11.
  • a device for connecting a knife for single or multi-layer cutting of flatly laid pliable material with the cutting head of a cutting machine is described above, 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)

Abstract

Es ist bekannt, dass in Zuschnittmaschinen, wie sie in der Textilindustrie eingesetzt werden, Messer an einem Schneidkopf geführt werden, um mit diesen flächig gelegtes biegeschlaffes Material wie Textilien, Leder und dergleichen im Einzel- oder Mehrlagenzuschnitt zu schneiden. Dabei ist es üblich, die Messer mit Schrauben, welche den Messerschaft an einem Stößel des Schneidkopfs befestigen, zu fixieren. Während dies zwar eine feste und belastbare Halterung des Messers gewährleistet, bedeutet dies eine verlängerte Rüstzeit.Die Erfindung schlägt daher eine Vorrichtung vor, welche eine einfache, aber ebenso haltbare Verbindung in kurzer Zeit ermöglicht. Hierfür ist es vorgesehen, flache Messer mit einer Auskehlung in einen Einführkanal einer Messeraufnahme des Stößels einzustecken, wobei über eine Queröffnung und darin aufgenommene Sicherungsmittel eine Halterung des Messers in der Messeraufnahme ermöglicht wird. Hierdurch kann ein Messer durch eine einfache Druckbetätigung entriegelt und im Anschluss entnommen werden.It is known that in cutting machines such as those used in the textile industry, knives are guided on a cutting head in order to use them to cut flat, pliable material such as textiles, leather and the like in single or multi-layer cuts. It is customary to fix the knives with screws that attach the knife shaft to a ram of the cutting head. While this ensures a firm and resilient mounting of the knife, this means a longer set-up time. The invention therefore proposes a device which enables a simple but equally durable connection in a short time. For this purpose, there is provision for flat knives with a groove to be inserted into an insertion channel of a knife receptacle of the ram, whereby the knife can be held in the knife receptacle via a transverse opening and securing means housed therein. This enables a knife to be unlocked with a simple push of the button and then removed.

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, sowie eine diesen kreuzende Queröffnung aufweist und der Messeraufnahme Sicherungsmittel zugeordnet sind, welche durch die Queröffnung bis in den Einführkanal einschiebbar sind, wobei ferner die Queröffnung als Querschlitz ausgebildet ist, in welchem ein Sicherungsmittel in Form eines Sicherungsrings aufgenommen ist.The present invention relates to a device for connecting a knife for single or multi-layer cutting of flatly laid pliable material with the cutting head of a cutting machine, comprising a ram which has a knife holder and connecting means opposite this for connecting the ram to the cutting head, the Knife holder has an insertion channel for receiving a knife shaft with a groove, as well as a transverse opening crossing this and the knife holder is assigned securing means which can be inserted through the transverse opening into the insertion channel, the transverse opening also being designed as a transverse slot in which a securing means in the form a locking ring is added.

Derartige Vorrichtungen sind bereits im Stand der Technik, namentlich der US 8,813,372 B2 und der DE 40 09 911 A1 , bekannt. Insbesondere werden bei 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.Such devices are already in the prior art, namely the US 8,813,372 B2 and the DE 40 09 911 A1 , famous. In particular, knives have hitherto been used in cutting machines which have bores in their knife shaft for attachment to a ram. A detachable, but very durable fastening can be made with a very 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 be changed frequently. It is also necessary that the The blades used are very sharp, so that handling 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 shaft, since it is necessary to hold the knife in place over 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 screwdriver 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 single or multi-layer cutting of flat, pliable material with the cutting head of a cutting machine according to the features of independent claim 1. Further, meaningful 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.
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.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 contrast to the prior art, however, the attachment of the knife to the ram does not take place via a screw connection, but rather via a quick connector. This provides a knife holder with an insertion channel for holding a knife shaft. In this insertion channel, which preferably interacts with the blade in a form-fitting manner, so that twisting the blade is prevented in the insertion channel, the knife is then fixed, preferably in a stop position. The fixation takes place on the basis of a securing means which can be pushed into a transverse opening which crosses the insertion channel. Here, different shapes of both the insertion channel and the transverse opening and thus also the securing means are possible.
Due to this configuration, by inserting the securing means into the transverse opening, the knife can be fixed in the insertion opening when the securing means is pushed through to the intersection between the insertion channel and the transverse opening. The fixation itself can be achieved here by both a force fit and a form fit. In combination with a form-fitting and, if possible, clearance-free accommodation of the knife shaft in the insertion channel, stable fixation takes place, which allows exact guidance even when the knife is heavily loaded with several layers of material and robust material. Since it is only necessary to push the securing means into the transverse opening, it can also be operated quickly and easily.

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, easily producible shape of the knife, which is essentially flat except for the bevel. A slot-shaped insertion channel in the knife holder can also be produced relatively easily and very precisely.

Das wenigstens eine Sicherungsmittel kann zudem vorteilhafterweise dadurch weitergebildet werden, 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.
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.The at least one securing means can also advantageously be developed in that it is held in the transverse opening with the aid of a compression spring. This enables it to be operated against the force of the compression spring and, when released, returns to its starting position due to the spring force. Apart from the fact that a captive securing means can be implemented in this way, such a construction ensures that the securing element with its securing section again automatically after actuation finds its way back into an engaged position and is held there securely. In addition to the securing section, which at least partially engages the intersection between the insertion channel and the transverse opening, a securing means has, with some advantage, an actuating means which the user can operate by hand in order to move the securing means from an engagement position to an evasive position.
It is particularly preferred if the shape and the freedom of movement of the securing means are selected so 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.

Eine besonders bevorzugte Ausführung stellt hierbei die Wahl des Sicherungsmittels in Form eines Sicherungsrings dar. Ein solcher Sicherungsring kann hierbei um die Messeraufnahme herumgelegt und dadurch unverlierbar an dieser befestigt sein. Ist gleichzeitig die Queröffnung als Querschlitz angelegt, insbesondere dergestalt, dass sie eine in die Messeraufnahme bis in den Einführkanal hinein seitlich eingebrachte Auskehlung oder Kerbe darstellt, so kann der Sicherungsring auf diese Weise in diese Auskehlung eingeschoben werden und so in Kontakt mit einem in dem Einführkanal aufgenommenen Messerschaft geraten. 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.A particularly preferred embodiment here is the selection of the securing means in the form of a securing ring. Such a securing ring can in this case be placed around the knife receptacle and thus secured to it in such a way that it cannot be lost. If at the same time the transverse opening is designed as a transverse slot, in particular in such a way that it represents a groove or notch made laterally in the knife receptacle as far as the insertion channel, the locking ring can in this way be pushed into this groove and thus in contact with one in the insertion channel Picked up knife shaft advised. If, ideally, the knife shaft also has a corresponding groove that is congruent with the transverse slot, the knife is held by the insertion of the securing means 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.In this case, the securing ring can, with particular advantage, have a pressure surface on its side facing away from the transverse opening, which in a specific embodiment can be supplemented with a securing section to form a ring. The two parts can be placed around the plunger in a conventional manner and then connected to one another, for example glued, riveted or screwed or otherwise connected. By applying pressure to the pressure surface, the locking ring, preferably against the force of a compression spring inserted between the pressure surface and the knife holder, is made of the Insertion channel and thus pushed out of the groove of an inserted knife shaft and releases the knife for removal from the insertion channel.

Um eine weiter verbesserte Zentrierung des Messers in dem Einführkanal zu erreichen, kann dem Sicherungsabschnitt an seiner Kontaktstelle zu dem Messerschaft eine Zentriervertiefung zugeordnet sein. 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 can be assigned to the securing section at its contact point with the knife shaft. The centering recess ensures that the securing section of the securing ring, in addition to restricting the mobility of the knife shaft in the longitudinal direction of the insertion channel, also adds lateral stability, since the material flanks adjoining a recess in the knife shaft are thereby in turn pushed into the centering recesses of the securing 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 quick connector with a plunger with knife holder and inserted knife in a perspective view,
Figure 2
the quick connector according to Figure 1 in a lateral cross-sectional view,
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 single or multi-layer cutting of flat, pliable material such as leather, woven fabrics, felt and the like. In such cutting machines, knives 11 are moved up and down over a bristle band on which the material layers 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, travels the desired contours and in doing so 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 holder 2 in which an insertion channel 4 is inscribed. Due to the flat shape of the knife shaft 12 of the knife 11, this is also formed in the form of a flat strip, so that the knife shaft 12 can be inserted into the insertion channel 4 easily, but largely without play.

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 shaft 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 here round, and extends so far into it that the transverse opening 5 crosses the insertion channel 4. This creates a common cavity into which, after a knife 11 has been inserted, 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, which is no longer secured as a result in the insertion direction of the insertion channel 4, can then be removed from the insertion channel 4 in a downward direction.

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 be done in Figure 2 can be understood even better. It can be seen there that the knife shaft 12 has a groove 14 which is in congruence 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 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 a pressure on the knife holder 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 groove 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 notched laterally in the area of the securing means 6, so that the securing means 6 cannot slip up or down. Furthermore, the securing means 6 is supported against the knife holder 2 by means of a compression spring 9, so that the securing means 6 returns to its position of engagement 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 and is screwed here. The securing section 7 as a separate element is shown in Figure 4 considered again. In the plan view it can be seen that the securing section 7 has a centering recess 8 on its arcuate area coming into contact with the groove 14 of the knife 11. This ensures that not only the securing means 6 engages in the groove 14 of the knife 11 and prevents movement in the insertion direction of the insertion channel 4, but also ensures that the flanks of the knife 11 adjoining the groove 14 are in turn supported laterally in the centering recess 8. This ensures stable lateral guidance of the knife 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.A device for connecting a knife for single or multi-layer cutting of flatly laid pliable material with the cutting head of a cutting machine is described above, 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
StößelPlunger
22
MesseraufnahmeKnife holder
33
VerbindungsmittelLanyard
44th
EinführkanalInsertion channel
55
QueröffnungTransverse opening
66th
SicherungsmittelSecuring means
77th
SicherungsabschnittFuse section
88th
ZentriervertiefungCentering recess
99
DruckfederCompression spring
1010
DruckflächePrinting area
1111
Messerknife
1212th
MesserschaftKnife shaft
1313th
MesserklingeKnife blade
1414th
AuskehlungRecess

Claims (4)

Vorrichtung zur Verbindung eines Messers (11) für den Einzel- oder Mehrlagenzuschnitt von flächig gelegtem biegeschlaffem Material mit dem Schneidkopf einer Zuschnittmaschine, umfassend einen Stößel (1), welcher eine Messeraufnahme (2), sowie dieser gegenüberliegende Verbindungsmittel (3) zur Verbindung des Stößels (1) mit dem Schneidkopf aufweisen,
wobei die Messeraufnahme (2) einen Einführkanal (4) zur Aufnahme eines Messerschafts (12) mit einer Auskehlung (14), sowie eine diesen kreuzende Queröffnung (5) aufweist und der Messeraufnahme (2) Sicherungsmittel (6) zugeordnet sind, welche durch die Queröffnung (5) bis in den Einführkanal (4) einschiebbar sind, wobei ferner die Queröffnung (5) als Querschlitz ausgebildet ist, in welchem ein Sicherungsmittel (6) in Form eines Sicherungsrings aufgenommen ist,
dadurch gekennzeichnet, dass der Sicherungsring mithilfe einer Druckfeder (9) derart in dem Querschlitz gehalten ist, dass ein Sicherungsabschnitt des Sicherungsrings in den Einführkanal einragt und dem Sicherungsring an seiner in den Einführkanal (4) einragenden Seite wenigstens eine Zentriervertiefung (8) zugeordnet ist.Device for connecting a knife (11) for single or multi-layer cutting of flat, pliable material with the cutting head of a cutting machine, comprising a ram (1) which has a knife holder (2) and connecting means (3) opposite this for connecting the ram (1) have with the cutting head,
wherein the knife receptacle (2) has an insertion channel (4) for receiving a knife shaft (12) with a groove (14) and a transverse opening (5) crossing this and the knife receptacle (2) is assigned securing means (6), which through the The transverse opening (5) can be pushed into the insertion channel (4), the transverse opening (5) also being designed as a transverse slot in which a securing means (6) in the form of a securing ring is received,
characterized in that the locking ring is held in the transverse slot with the aid of a compression spring (9) in such a way that a locking section of the locking ring protrudes into the insertion channel and at least one centering recess (8) is assigned to the locking ring on its side protruding into the insertion channel (4). Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, dass der Einführkanal (4) als Schlitzaufnahme ausgebildet ist, in welchen ein flacher Messerschaft (12) einführbar ist.Device according to Claim 1, characterized in that the insertion channel (4) is designed as a slot receptacle into which a flat knife shank (12) can be inserted. Vorrichtung gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Sicherungsmittel gegen die Kraft der Druckfeder aus dem Einführkanal, jedoch nicht aus der Queröffnung ausschiebbar sind.Device according to one of Claims 1 or 2, characterized in that the securing means can be pushed out of the insertion channel, but not out of the transverse opening, against the force of the compression spring. Vorrichtung gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Sicherungsring, wenigstens auf seiner von der Queröffnung (5) abgewandten Seite, eine Druckfläche (10) zur Druckbetätigung der Sicherungsmittel (6) ausbildet.Device according to one of the preceding claims, characterized in that the locking ring, at least on its side facing away from the transverse opening (5), forms a pressure surface (10) for pressure actuation of the locking means (6).
EP21151859.2A 2020-01-22 2021-01-15 Quick connector for a blade of a cutting machine Active EP3854550B1 (en)

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DE102020101412.0A DE102020101412A1 (en) 2020-01-22 2020-01-22 Quick connector for a knife of a cutting machine

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20090071016A1 (en) * 2007-09-14 2009-03-19 Scott John S Blade clamp mechanism

Family Cites Families (2)

* 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.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US20090071016A1 (en) * 2007-09-14 2009-03-19 Scott John S Blade clamp mechanism
US8813372B2 (en) 2007-09-14 2014-08-26 Milwaukee Electric Tool Corporation Blade clamp mechanism

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EP3854550C0 (en) 2023-07-26
DE102020101412A1 (en) 2021-07-22

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