EP3510883B1 - Device for inserting eyelets into a textile or plastic tarpaulin - Google Patents

Device for inserting eyelets into a textile or plastic tarpaulin Download PDF

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Publication number
EP3510883B1
EP3510883B1 EP18151375.5A EP18151375A EP3510883B1 EP 3510883 B1 EP3510883 B1 EP 3510883B1 EP 18151375 A EP18151375 A EP 18151375A EP 3510883 B1 EP3510883 B1 EP 3510883B1
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EP
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Prior art keywords
piston
cylinder chamber
tool part
return spring
channel
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EP18151375.5A
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German (de)
French (fr)
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EP3510883A1 (en
Inventor
Josef Papenheim
Franz Vormweg
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Franz Miederhoff OHG
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Franz Miederhoff OHG
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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41H—APPLIANCES OR METHODS FOR MAKING CLOTHES, e.g. FOR DRESS-MAKING OR FOR TAILORING, NOT OTHERWISE PROVIDED FOR
    • A41H37/00—Machines, appliances or methods for setting fastener-elements on garments
    • A41H37/02—Setting hooks or eyes

Definitions

  • the invention relates to a device for introducing eyelets into a textile or plastic tarpaulin, comprising a punching and flanging tool with an upper tool part which can be moved via a hydraulically actuated double-piston arrangement against a fixedly arranged lower tool part, which double-piston arrangement one in the first cylinder space
  • Cylinder housing sealingly guided first, outer piston which in turn has a second cylinder chamber, in which a second, inner piston is sealingly guided
  • the outer cylinder chamber and the inner cylinder chamber can be filled via a single hydraulic supply for lowering the upper part of the tool, after reaching the lowered cutting position of the inner piston, the outer piston can also be lowered with the flanging part of the upper tool part and at least one return spring for lifting the upper tool part is arranged in the basic position after completion of the operation.
  • Devices of the aforementioned type are used to insert eyelets in tarpaulins, for example commercial vehicle tarpaulins, tent sheets or the like. Such a device is in the DE 37 42 418 A1 described.
  • this known eyelet insertion machine With the aid of this known eyelet insertion machine, the necessary hole can be punched into the carrier web in one operation and then the eyelet neck or the end of the eyelet neck can be flanged to fix the eyelet on the carrier web.
  • this eyelet inserting machine has a double-piston unit, in which a first, outer piston is guided in a first cylinder chamber, which in turn comprises a second cylinder chamber in which a second, inner piston is sealingly guided.
  • This double piston arrangement drives out the upper tool of a punching and flanging tool, the inner piston carrying the punching tool and the outer piston carrying the flanging tool.
  • This double piston arrangement can be operated hydraulically. To carry out a working stroke, hydraulic fluid is applied to the cylinder space of the cylinder housing, so that the double piston arrangement with its outer piston and the inner piston received by it is moved together. As a result, a hole is made in the carrier web via the punching tool carried by the inner piston. In a subsequent step, only the outer piston, which carries the flanging tool, is moved to carry out the flanging process, while the inner piston rests on a cutting abutment of the lower tool part due to its support.
  • the outer piston is connected to return springs surrounding the cylinder housing via cantilever arms arranged on the outside thereof.
  • the working stroke of the outer piston takes place against the restoring force of these restoring springs.
  • the outer piston is brought into its basic position.
  • a disadvantage of this known eyelet inserting machine is that several return springs designed as tension springs are required in order to ensure that the restoring force is introduced into the outer piston symmetrically with respect to its axis of movement, so that an excessive load on the piston seal or tilting of the outer piston in the outer cylinder space is avoided is. This results in a considerable space for the eyelet insertion machine.
  • the return springs surrounding the cylinder housing must be shielded from the user in order to avoid injuries due to the spring movements.
  • the invention seeks to remedy this.
  • the invention has for its object to provide a device for introducing eyelets in a textile or plastic tarpaulin of the aforementioned type, which has a smaller space and in which the risk of injury to the operator is reduced. According to the invention, this object is achieved by a device having the features of the characterizing part of patent claim 1.
  • the invention provides a device for introducing eyelets into a textile or plastic tarpaulin of the aforementioned type, which has a smaller installation space and which reduces the risk of injury to the operator is. Due to the fact that the at least one return spring is arranged in the first cylinder chamber surrounding the outer piston, a direct effect of the restoring forces on the outer piston is achieved, the return spring being at the same time sealed off from the outside. The restoring forces act uniformly all around on the outer piston, whereby tilting or tilting of the outer piston in the outer cylinder space is excluded.
  • the cylinder housing has a constriction in diameter at its end of the outer cylinder chamber facing the upper tool part, which constriction forms a shoulder for the return spring to rest on.
  • a circumferential seat for the return spring is achieved.
  • a slide ring for guiding the outer piston is preferably inserted into the diameter constriction. This causes a sealing slide bearing of the outer piston in the cylinder housing.
  • a flange ring is arranged on the outer piston at its end facing away from the upper tool part, which flange has an outward-facing, circumferential collar for engaging the return spring.
  • the flange piece has an internal thread with which it is screwed onto an external thread arranged on the outside of the outer piston. This facilitates the assembly of the flange piece on the outer piston. In addition, this allows an axial adjustment of the flange piece along the outer piston, whereby the preload of the return spring can be adjusted by reducing the spring travel.
  • the collar of the flange ring is provided on its side opposite the return spring with a sealing ring projecting above the collar. This is a seal between the narrowing of the diameter of the cylinder housing and the collar of the flange ring formed spring space.
  • the cylinder housing has a cylinder head which is provided with hydraulic channels, a main channel for connection to a hydraulic oil source being arranged, in which a connection channel with the outer cylinder space and an outlet channel to a collecting tank are arranged axially spaced from one another, and in which the main channel is arranged a slide biased by a spring, via which the connecting channel or the drain channel can be closed depending on the pressure present.
  • the arranged return spring closes the connecting duct with simultaneous opening of the outlet duct, thereby allowing hydraulic oil to drain from the outer cylinder chamber when the double piston is retracted into the outer cylinder chamber.
  • the device selected as an exemplary embodiment for introducing eyelets into a textile or plastic tarpaulin comprises a cylinder housing 1, in the outer cylinder space 11 of which an outer piston 2 is guided in a sealing manner.
  • the outer piston 2 is in turn designed as a cylinder for a second, inner piston 3 and has an inner cylinder space 21 for this purpose.
  • the inner piston 3 is sealingly guided with a sealing surface 31 into a recess in the tool carrier 51 of a punching and flanging tool 5.
  • the tool carrier 51 is screwed to the outer piston 21.
  • the tool carrier 51 receives the upper tool part 52 of the punching and flanging tool 5, which interacts with a fixedly arranged lower tool part 53.
  • the cylinder housing 1 is closed by a cylinder head 6, which is provided with hydraulic channels for supplying the double piston arrangement formed from the cylinder housing 1, the outer piston 2 and the inner piston 3 with hydraulic oil.
  • the cylinder head 6 is additionally shown in a further sectional view in the figures.
  • a central main channel 61 is arranged, which ends at the end in a connection 62 for a hydraulic pressure line.
  • a supply channel 63 for the outer cylinder space 11 and an outlet channel 64 to a collecting tank, which open into the main channel 61, are arranged axially spaced from one another orthogonally to the main channel 61.
  • a cylindrical slide 7 is slidably arranged, which is biased via a coil spring 71 in the direction of the connection 62 for the pressure line, such that the slide 7 closes the connecting channel 63 in the rest position, the drain channel 64 being open to the collecting tank at the same time .
  • the slide 7 is displaced by the oil pressure against the bias of the coil spring 71, whereby the connecting channel 63 is released.
  • the drain channel 64 is closed by the slide 7. Hydraulic oil is applied to the outer cylinder space 11 via the now open connecting duct 63.
  • a sealing tube 8 with an inner through bore 81 is screwed into the cylinder head 6, which is connected to a bypass line 65 which is acted upon by an adjustable throttle valve 66 and which leads into the outer cylinder space 11 of the cylinder housing 1.
  • the sealing tube 8 is guided via a sealing sleeve 22 into the inner cylinder space 21 of the outer piston 2.
  • the sealing tube 8 has an upper tapered area 82 and a lower, enlarged diameter sealing area 83.
  • the outer dimensions of the tapered area 82 are selected such that when this area 82 is positioned in the sealing sleeve 22, an annular gap is formed between the sealing tube 8 and the sealing sleeve 22, through which hydraulic fluid can reach the inner cylinder space 21. If the sealing tube 8 with the sealing region 83 is positioned in the sealing sleeve 22, the sealing sleeve 22 is sealed.
  • the cylinder housing 1 At its end facing the upper tool part 52, the cylinder housing 1 has a diameter constriction, as a result of which a shoulder 12 is formed.
  • a sliding ring 13 for the sealing sliding bearing of the outer piston 2 in the outer cylinder space 11 is pressed into the narrowing of the diameter.
  • a flange ring 23 is applied to the outer piston 2 and has an outwardly directed collar 24.
  • a return spring 4 is arranged around the outer piston 2 between the shoulder 12 of the cylinder housing 1 and the collar 24 of the flange ring 23.
  • a sealing ring 25 projecting beyond the collar is also arranged on the collar 24 of the flange ring 23.
  • the sealing ring 25 seals the spring space formed between the collar 24 of the flange ring 23 and the shoulder 12 of the cylinder housing 1 from the outer cylinder space 11.
  • the punching and flanging tool 5 is first equipped with a corresponding eyelet blank and the tarpaulin is then placed on the lower tool part 53.
  • the hydraulic fluid supplied via the connection 62 of the cylinder head 6 is first pressed into the outer cylinder space 11 via the connecting channel 63 and also through the annular gap between the sealing tube 8 and the sealing sleeve 22 penetrated by it.
  • the increasing hydraulic pressure makes the outer piston 2 together the inner piston 3 arranged in its inner cylinder space 21 into the in Figure 2 shown cutting position moves.
  • the sealing region 83 of the sealing tube 8 comes into a sealing position in the sealing sleeve 22 of the outer piston 2, as a result of which the inner cylinder space 21 is sealed off from the outer cylinder space 11 of the cylinder housing 1, as in FIG Figure 3 is reproduced.
  • the cutting process of the punching and flanging tool 5 has ended here.
  • the entire hydraulic pressure now acts exclusively on the outer piston 2, so that its feed path down into the in Figure 4 shown position is continued.
  • the eyelet is flanged via the flanging tool of the upper tool part 52 connected to the outer bulb 2 (cf. Figure 5 ).
  • the pressure applied to the connection 62 is released, as a result of which the slide is moved to the left via the coil spring 71.
  • the connecting channel 63 is closed via the slide 7 and at the same time the drain channel 64 is released to the tank.
  • the pressurized hydraulic oil in the outer cylinder chamber 11 can now flow away; the outer piston 2 is moved back into the cylinder housing 1 via the return spring 4, whereby the in Figure 1 reproduced basic position is established.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Actuator (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Einbringung von Ösen in eine Textil- oder Kunststoffplane, umfassend ein Stanz- und Bördelwerkzeug mit einem oberen Werkzeugteil, das über eine hydraulisch betätigbare Doppelkolbenanordnung gegen ein ortsfest angeordnetes unteres Werkzeugteil bewegbar ist, welche Doppelkolbenanordnung einen in dem ersten Zylinderraum eines Zylindergehäuses dichtend geführten ersten, äußeren Kolben umfasst, der wiederum einen zweiten Zylinderraum aufweist, in dem ein zweiter, innerer Kolben dichtend geführt ist, wobei der äußere Zylinderraum und der innere Zylinderraum über eine einzige Hydraulikzufuhr zum Absenken des Werkzeugoberteils füllbar sind, wobei nach Erreichen der abgesenkten Schneidstellung des inneren Kolbens der äußere Kolben mit dem Bördelteil des Werkzeugoberteils zusätzlich absenkbar ist und wobei wenigstens eine Rückstellfeder zum Anheben des Werkzeugoberteils nach Beendigung des Arbeitsgangs in die Grundstellung angeordnet ist.The invention relates to a device for introducing eyelets into a textile or plastic tarpaulin, comprising a punching and flanging tool with an upper tool part which can be moved via a hydraulically actuated double-piston arrangement against a fixedly arranged lower tool part, which double-piston arrangement one in the first cylinder space Cylinder housing sealingly guided first, outer piston, which in turn has a second cylinder chamber, in which a second, inner piston is sealingly guided, the outer cylinder chamber and the inner cylinder chamber can be filled via a single hydraulic supply for lowering the upper part of the tool, after reaching the lowered cutting position of the inner piston, the outer piston can also be lowered with the flanging part of the upper tool part and at least one return spring for lifting the upper tool part is arranged in the basic position after completion of the operation.

Vorrichtungen der vorgenannten Art dienen zum Einsetzen von Ösen in Trägerplanen, beispielsweise Nutzfahrzeugplanen, Zeltbahnen oder dergleichen. Eine solche Vorrichtung ist in der DE 37 42 418 A1 beschrieben. Mithilfe dieser vorbekannten Öseneinsetzmaschine kann in einem Arbeitsgang das notwendige Loch in die Trägerbahn gestanzt und anschließend der Ösenhals, bzw. das Ende des Ösenhalses zum Festsetzen der Öse an der Trägerbahn umgebördelt werden. Hierzu verfügt diese Öseneinsetzmaschine über eine Doppelkolbeneinheit, bei der in einem ersten Zylinderraum ein erster, äußerer Kolben geführt ist, der wiederum einen zweiten Zylinderraum umfasst, in dem ein zweiter, innerer Kolben dichtend geführt ist. Diese Doppelkolbenanordnung treibt das obere Werkzeug eines Stanz- und Bördelwerkzeugs aus, wobei der innere Kolben das Stanzwerkzeug und der äußere Kolben das Bördelwerkzeug trägt. Diese Doppelkolbenanordnung ist hydraulisch betätigbar. Zum Ausführen eines Arbeitshubs wird der Zylinderraum des Zylindergehäuses mit Hydraulikflüssigkeit beaufschlagt, sodass die Doppelkolbenanordnung mit ihrem äußeren Kolben und dem von diesem aufgenommenen inneren Kolben gemeinsam bewegt wird. Hierdurch wird über das von dem inneren Kolben getragene Stanzwerkzeug ein Loch in die Trägerbahn eingebracht. In einem nachfolgenden Schritt wird zur Durchführung des Bördelprozesses lediglich der äußere Kolben, der das Bördelwerkzeug trägt, bewegt, während der innere Kolben aufgrund seiner Abstützung an einem Schneidwiderlager des unteren Werkzeugteils ruht. Der äußere Kolben ist über außen an diesem angeordnete Kragarme an das Zylindergehäuse umgebende Rückstellfedern angeschlossen. Der Arbeitshub des äußeren Kolbens erfolgt gegen die Rückstellkraft dieser Rückstellfedern. Über die in den Rückstellfedern nach Ausübung des Arbeitshubs gespeicherte Energie erfolgt nach gleichzeitiger Unterbrechung der Beaufschlagung des äußeren Zylinderraums mit Hydraulikflüssigkeit eine Verbringung des äußeren Kolbens in seiner Grundstellung.Devices of the aforementioned type are used to insert eyelets in tarpaulins, for example commercial vehicle tarpaulins, tent sheets or the like. Such a device is in the DE 37 42 418 A1 described. With the aid of this known eyelet insertion machine, the necessary hole can be punched into the carrier web in one operation and then the eyelet neck or the end of the eyelet neck can be flanged to fix the eyelet on the carrier web. For this purpose, this eyelet inserting machine has a double-piston unit, in which a first, outer piston is guided in a first cylinder chamber, which in turn comprises a second cylinder chamber in which a second, inner piston is sealingly guided. This double piston arrangement drives out the upper tool of a punching and flanging tool, the inner piston carrying the punching tool and the outer piston carrying the flanging tool. This double piston arrangement can be operated hydraulically. To carry out a working stroke, hydraulic fluid is applied to the cylinder space of the cylinder housing, so that the double piston arrangement with its outer piston and the inner piston received by it is moved together. As a result, a hole is made in the carrier web via the punching tool carried by the inner piston. In a subsequent step, only the outer piston, which carries the flanging tool, is moved to carry out the flanging process, while the inner piston rests on a cutting abutment of the lower tool part due to its support. The outer piston is connected to return springs surrounding the cylinder housing via cantilever arms arranged on the outside thereof. The working stroke of the outer piston takes place against the restoring force of these restoring springs. Via the energy stored in the return springs after the working stroke has been carried out, after the simultaneous interruption of the application of hydraulic fluid to the outer cylinder space, the outer piston is brought into its basic position.

Nachteilig an dieser vorbekannten Öseneinsetzmaschine ist, dass mehrere als Zugfedern konzipierte Rückstellfedern benötigt werden, um eine Einleitung der Rückstellkraft in den äußeren Kolben symmetrisch zu seiner Bewegungsachse zu gewährleisten, damit eine übermäßige Belastung der Kolbendichtung bzw. ein Verkanten des äußeren Kolbens in dem äußeren Zylinderraum vermieden ist. Hierdurch ist ein erheblicher Bauraum der Öseneinsetzmaschine bewirkt. Darüber hinaus sind die das Zylindergehäuse umgebenden Rückstellfedern gegenüber dem Benutzer abzuschirmen, um Verletzungen infolge der Federbewegungen zu vermeiden.A disadvantage of this known eyelet inserting machine is that several return springs designed as tension springs are required in order to ensure that the restoring force is introduced into the outer piston symmetrically with respect to its axis of movement, so that an excessive load on the piston seal or tilting of the outer piston in the outer cylinder space is avoided is. This results in a considerable space for the eyelet insertion machine. In addition, the return springs surrounding the cylinder housing must be shielded from the user in order to avoid injuries due to the spring movements.

Hier will die Erfindung Abhilfe schaffen. Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Einbringung von Ösen in eine Textil- oder Kunststoffplane der vorgenannten Art bereitzustellen, die einen geringeren Bauraum aufweist und bei der das Verletzungsrisiko des Bedieners verringert ist. Gemäß der Erfindung wird diese Aufgabe durch eine Vorrichtung mit den Merkmalen des kennzeichnenden Teils des Patentanspruchs 1 gelöst.The invention seeks to remedy this. The invention has for its object to provide a device for introducing eyelets in a textile or plastic tarpaulin of the aforementioned type, which has a smaller space and in which the risk of injury to the operator is reduced. According to the invention, this object is achieved by a device having the features of the characterizing part of patent claim 1.

Mit der Erfindung ist eine Vorrichtung zur Einbringung von Ösen in eine Textil- oder Kunststoffplane der vorgenannten Art bereitgestellt, die einen geringeren Bauraum aufweist und bei der das Verletzungsrisiko des Bedieners verringert ist. Dadurch, dass die wenigstens eine Rückstellfeder den äußeren Kolben umgebend in dem ersten Zylinderraum angeordnet ist, ist eine unmittelbare Einwirkung der Rückstellkräfte auf den äußeren Kolben erzielt, wobei die Rückstellfeder zugleich nach außen hin abgeschottet ist. Dabei wirken die Rückstellkräfte gleichmäßig umlaufend auf den äußeren Kolben ein, wodurch ein Verkippen oder Verkanten des äußeren Kolbens in dem äußeren Zylinderraum ausgeschlossen ist.The invention provides a device for introducing eyelets into a textile or plastic tarpaulin of the aforementioned type, which has a smaller installation space and which reduces the risk of injury to the operator is. Due to the fact that the at least one return spring is arranged in the first cylinder chamber surrounding the outer piston, a direct effect of the restoring forces on the outer piston is achieved, the return spring being at the same time sealed off from the outside. The restoring forces act uniformly all around on the outer piston, whereby tilting or tilting of the outer piston in the outer cylinder space is excluded.

In Weiterbildung der Erfindung weist das Zylindergehäuse an seinem dem oberen Werkzeugteil zugewandten Ende des äußeren Zylinderraums eine Durchmesserverengung auf, die einen Absatz zur Anlage der Rückstellfeder ausbildet. Hierdurch ist ein umlaufender Sitz für die Rückstellfeder erzielt. Bevorzugt ist in die Durchmesserverengung ein Gleitring zur Führung des äußeren Kolbens eingesetzt. Hierdurch ist eine dichtende Gleitlagerung des äußeren Kolbens in dem Zylindergehäuse bewirkt.In a further development of the invention, the cylinder housing has a constriction in diameter at its end of the outer cylinder chamber facing the upper tool part, which constriction forms a shoulder for the return spring to rest on. As a result, a circumferential seat for the return spring is achieved. A slide ring for guiding the outer piston is preferably inserted into the diameter constriction. This causes a sealing slide bearing of the outer piston in the cylinder housing.

In Ausgestaltung der Erfindung ist auf dem äußeren Kolben an seinem dem oberen Werkzeugteil abgewandten Ende ein Flanschring angeordnet, der einen nach außen gerichteten, umlaufenden Kragen zur Anlage der Rückstellfeder aufweist. Hierdurch ist ein umlaufender kolbenseitiger Sitz für die Rückstellfeder erzielt.In an embodiment of the invention, a flange ring is arranged on the outer piston at its end facing away from the upper tool part, which flange has an outward-facing, circumferential collar for engaging the return spring. As a result, a circumferential piston-side seat for the return spring is achieved.

In weiterer Ausgestaltung der Erfindung weist das Flanschstück ein Innengewinde auf, mit dem es auf ein außen auf dem äußeren Kolben angeordnetes Außengewinde aufgeschraubt ist. Hierdurch ist die Montage des Flanschstücks auf dem äußeren Kolben erleichtert. Zudem ist hierdurch eine axiale Verstellung des Flanschstücks entlang dem äußeren Kolben ermöglicht, wodurch eine Einstellbarkeit der Vorspannung der Rückstellfeder über eine Verringerung des Federweges erzielt ist.In a further embodiment of the invention, the flange piece has an internal thread with which it is screwed onto an external thread arranged on the outside of the outer piston. This facilitates the assembly of the flange piece on the outer piston. In addition, this allows an axial adjustment of the flange piece along the outer piston, whereby the preload of the return spring can be adjusted by reducing the spring travel.

In Weiterbildung der Erfindung ist der Kragen des Flanschrings auf seiner der Rückstellfeder gegenüberliegenden Seite mit einem den Kragen überragenden Dichtring versehen. Hierdurch ist eine Abdichtung des zwischen der Durchmesserverengung des Zylindergehäuses und dem Kragen des Flanschrings gebildeten Federraums erzielt.In a further development of the invention, the collar of the flange ring is provided on its side opposite the return spring with a sealing ring projecting above the collar. This is a seal between the narrowing of the diameter of the cylinder housing and the collar of the flange ring formed spring space.

In Ausgestaltung der Erfindung weist das Zylindergehäuse einen Zylinderkopf auf, der mit Hydraulikkanälen versehen ist, wobei ein Hauptkanal zur Verbindung mit einer Hydraulikölquelle angeordnet ist, in den axial beabstandet zueinander ein Verbindungskanal mit dem äußeren Zylinderraum und ein Ablaufkanal zu einem Sammeltank angeordnet sind und wobei in dem Hauptkanal ein Schieber über eine Feder vorgespannt angeordnet ist, über den in Abhängigkeit von dem anliegenden Druck der Verbindungskanal oder der Ablaufkanal verschließbar ist. Hierdurch ist eine zuverlässige, einfache mechanische Ventilanordnung in dem Zylinderkopf erzielt, durch die bei Anliegen eines Druckes der Ablaufkanal automatisch verschlossen wird. Über die angeordnete Rückstellfeder ist in dem Zustand, wo kein Druck mehr an dem Hauptkanal anliegt, ein Verschließen des Verbindungskanals mit gleichzeitigem Öffnen des Ablaufkanals erzielt, wodurch ein Ablauf des Hydrauliköls aus dem äußeren Zylinderraum bei Einfahren des Doppelkolbens in den äußeren Zylinderraum ermöglicht ist.In an embodiment of the invention, the cylinder housing has a cylinder head which is provided with hydraulic channels, a main channel for connection to a hydraulic oil source being arranged, in which a connection channel with the outer cylinder space and an outlet channel to a collecting tank are arranged axially spaced from one another, and in which the main channel is arranged a slide biased by a spring, via which the connecting channel or the drain channel can be closed depending on the pressure present. As a result, a reliable, simple mechanical valve arrangement is achieved in the cylinder head, by means of which the outlet channel is automatically closed when pressure is applied. In the state where there is no more pressure on the main duct, the arranged return spring closes the connecting duct with simultaneous opening of the outlet duct, thereby allowing hydraulic oil to drain from the outer cylinder chamber when the double piston is retracted into the outer cylinder chamber.

Andere Weiterbildungen und Ausgestaltungen der Erfindung sind in den übrigen Unteransprüchen angegeben. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird nachfolgend im Einzelnen beschrieben. Es zeigen:

Figur 1
die schematische Darstellung einer Vorrichtung zur Einbringung von Ösen in eine Textil- oder Kunststoffplane in Grundstellung;
Figur 2
die Vorrichtung aus Figur 1 in einer Stellung zu Beginn des Schneidvorgangs;
Figur 3
die Vorrichtung aus Figur 1 in einer Stellung am Ende des Schneidvorgangs;
Figur 4
die Vorrichtung aus Figur 1 in einer Stellung zu Beginn des Öseneinsetzvorgangs und
Figur 5
die Vorrichtung aus Figur 1 in einer Stellung am Ende des Öseneinsetzvorgangs.
Other developments and refinements of the invention are specified in the remaining subclaims. An embodiment of the invention is shown in the drawings and is described in detail below. Show it:
Figure 1
the schematic representation of a device for introducing eyelets in a textile or plastic tarpaulin in the basic position;
Figure 2
the device Figure 1 in a position at the beginning of the cutting process;
Figure 3
the device Figure 1 in a position at the end of the cutting process;
Figure 4
the device Figure 1 in a position at the beginning of the eyelet insertion process and
Figure 5
the device Figure 1 in a position at the end of the eyelet insertion process.

Die als Ausführungsbeispiel gewählte Vorrichtung zur Einbringung von Ösen in eine Textil- oder Kunststoffplane umfasst ein Zylindergehäuse 1, in dessen äußeren Zylinderraum 11 ein äußerer Kolben 2 dichtend geführt ist. Der äußere Kolben 2 ist wiederum als Zylinder für einen zweiten, inneren Kolben 3 ausgestaltet und weist hierzu einen inneren Zylinderraum 21 auf. Der innere Kolben 3 ist dichtend mit einer Dichtfläche 31 in eine Ausnehmung des Werkzeugträgers 51 eines Stanz- und Bördelwerkzeugs 5 geführt. Der Werkzeugträger 51 ist im Ausführungsbeispiel mit dem äußeren Kolben 21 verschraubt. Der Werkzeugträger 51 nimmt das obere Werkzeugteil 52 des Stanz- und Bördelwerkzeugs 5 auf, das mit einem ortsfest angeordneten unteren Werkzeugteil 53 zusammenwirkt.The device selected as an exemplary embodiment for introducing eyelets into a textile or plastic tarpaulin comprises a cylinder housing 1, in the outer cylinder space 11 of which an outer piston 2 is guided in a sealing manner. The outer piston 2 is in turn designed as a cylinder for a second, inner piston 3 and has an inner cylinder space 21 for this purpose. The inner piston 3 is sealingly guided with a sealing surface 31 into a recess in the tool carrier 51 of a punching and flanging tool 5. In the exemplary embodiment, the tool carrier 51 is screwed to the outer piston 21. The tool carrier 51 receives the upper tool part 52 of the punching and flanging tool 5, which interacts with a fixedly arranged lower tool part 53.

Das Zylindergehäuse 1 ist über einen Zylinderkopf 6 verschlossen, der mit Hydraulikkanälen zur Versorgung der aus dem Zylindergehäuse 1, dem äußeren Kolben 2 sowie dem inneren Kolben 3 gebildeten Doppelkolbenanordnung mit Hydrauliköl versehen ist. Der Zylinderkopf 6 ist in den Figuren jeweils zusätzlich in einer weiteren Schnittdarstellung abgebildet. Es ist ein zentraler Hauptkanal 61 angeordnet, der endseitig in einen Anschluss 62 für eine Hydraulikdruckleitung mündet. Axial beabstandet zueinander ist orthogonal zu dem Hauptkanal 61 ein Versorgungskanal 63 für den äußeren Zylinderraum 11 sowie ein Ablaufkanal 64 zu einem Sammeltank angeordnet, die in den Hauptkanal 61 münden. In dem Hauptkanal 61 ist ein zylinderförmiger Schieber 7 verschiebbar angeordnet, der über eine Schraubenfeder 71 in Richtung des Anschlusses 62 für die Druckleitung vorgespannt ist, derart, dass in Ruhestellung der Schieber 7 den Verbindungskanal 63 verschließt, wobei gleichzeitig der Ablaufkanal 64 zum Sammeltank offen ist. Bei Beaufschlagung des Hauptkanals 61 mit Hydrauliköl wird der Schieber 7 über den Öldruck entgegen der Vorspannung der Schraubenfeder 71 verschoben, wodurch der Verbindungskanal 63 freigegeben wird. Zugleich wird der Ablaufkanal 64 durch den Schieber 7 verschlossen. Über den nun offenen Verbindungskanal 63 erfolgt die Beaufschlagung des äußeren Zylinderraums 11 mit Hydrauliköl.The cylinder housing 1 is closed by a cylinder head 6, which is provided with hydraulic channels for supplying the double piston arrangement formed from the cylinder housing 1, the outer piston 2 and the inner piston 3 with hydraulic oil. The cylinder head 6 is additionally shown in a further sectional view in the figures. A central main channel 61 is arranged, which ends at the end in a connection 62 for a hydraulic pressure line. A supply channel 63 for the outer cylinder space 11 and an outlet channel 64 to a collecting tank, which open into the main channel 61, are arranged axially spaced from one another orthogonally to the main channel 61. In the main channel 61, a cylindrical slide 7 is slidably arranged, which is biased via a coil spring 71 in the direction of the connection 62 for the pressure line, such that the slide 7 closes the connecting channel 63 in the rest position, the drain channel 64 being open to the collecting tank at the same time . When hydraulic oil is applied to the main channel 61, the slide 7 is displaced by the oil pressure against the bias of the coil spring 71, whereby the connecting channel 63 is released. At the same time, the drain channel 64 is closed by the slide 7. Hydraulic oil is applied to the outer cylinder space 11 via the now open connecting duct 63.

Weiterhin ist in dem Zylinderkopf 6 ein Dichtrohr 8 mit einer inneren Durchgangsbohrung 81 eingeschraubt, die mit einer von einem einstellbaren Drosselventil 66 beaufschlagten Bypassleitung 65 verbunden ist, welche in den äußeren Zylinderraum 11 des Zylindergehäuses 1 führt. Das Dichtrohr 8 ist über eine Dichtmuffe 22 in den inneren Zylinderraum 21 des äußeren Kolbens 2 geführt. Das Dichtrohr 8 weist einen oberen verjüngten Bereich 82 und einen unteren, durchmesservergrößerten Dichtbereich 83 auf. Der verjüngte Bereich 82 ist in seinen Außenabmessungen so gewählt, dass bei Positionierung dieses Bereichs 82 in der Dichtmuffe 22 zwischen dem Dichtrohr 8 und der Dichtmuffe 22 ein Ringspalt gebildet ist, durch den Hydraulikflüssigkeit in den inneren Zylinderraum 21 gelangen kann. Ist das Dichtrohr 8 mit dem Dichtbereich 83 in der Dichtmuffe 22 positioniert, ist diese dichtend verschlossen.Furthermore, a sealing tube 8 with an inner through bore 81 is screwed into the cylinder head 6, which is connected to a bypass line 65 which is acted upon by an adjustable throttle valve 66 and which leads into the outer cylinder space 11 of the cylinder housing 1. The sealing tube 8 is guided via a sealing sleeve 22 into the inner cylinder space 21 of the outer piston 2. The sealing tube 8 has an upper tapered area 82 and a lower, enlarged diameter sealing area 83. The outer dimensions of the tapered area 82 are selected such that when this area 82 is positioned in the sealing sleeve 22, an annular gap is formed between the sealing tube 8 and the sealing sleeve 22, through which hydraulic fluid can reach the inner cylinder space 21. If the sealing tube 8 with the sealing region 83 is positioned in the sealing sleeve 22, the sealing sleeve 22 is sealed.

An seinem dem oberen Werkzeugteil 52 zugewandten Ende weist das Zylindergehäuse 1 eine Durchmesserverengung auf, wodurch ein Absatz 12 gebildet ist. In die Durchmesserverengung ist ein Gleitring 13 zur dichtenden Gleitlagerung des äußeren Kolbens 2 in dem äußeren Zylinderraum 11 eingepresst. An seinem dem oberen Werkzeugteil 52 abgewandten Ende ist auf dem äußeren Kolben 2 ein Flanschring 23 aufgebracht, der einen nach außen gerichteten Kragen 24 aufweist. Zwischen dem Absatz 12 des Zylindergehäuses 1 und dem Kragen 24 des Flanschrings 23 ist eine Rückstellfeder 4 um den äußeren Kolben 2 herum angeordnet. Auf seiner der Rückstellfeder 4 abgewandten Seite ist auf dem Kragen 24 des Flanschrings 23 weiterhin ein den Kragen überragender Dichtring 25 angeordnet. Der Dichtring 25 dichtet den zwischen dem Kragen 24 des Flanschrings 23 und dem Absatz 12 des Zylindergehäuses 1 gebildeten Federraum gegenüber dem äußeren Zylinderraum 11 ab.At its end facing the upper tool part 52, the cylinder housing 1 has a diameter constriction, as a result of which a shoulder 12 is formed. A sliding ring 13 for the sealing sliding bearing of the outer piston 2 in the outer cylinder space 11 is pressed into the narrowing of the diameter. At its end facing away from the upper tool part 52, a flange ring 23 is applied to the outer piston 2 and has an outwardly directed collar 24. A return spring 4 is arranged around the outer piston 2 between the shoulder 12 of the cylinder housing 1 and the collar 24 of the flange ring 23. On its side facing away from the return spring 4, a sealing ring 25 projecting beyond the collar is also arranged on the collar 24 of the flange ring 23. The sealing ring 25 seals the spring space formed between the collar 24 of the flange ring 23 and the shoulder 12 of the cylinder housing 1 from the outer cylinder space 11.

Zum Einbringen einer Öse in eine Textil- oder Kunststoffplane wird zunächst das Stanz- und Bördelwerkzeug 5 mit einem entsprechenden Ösenrohling bestückt und nachfolgend die Plane auf das untere Werkzeugteil 53 aufgelegt.To insert an eyelet into a textile or plastic tarpaulin, the punching and flanging tool 5 is first equipped with a corresponding eyelet blank and the tarpaulin is then placed on the lower tool part 53.

Über eine an dem Anschluss 62 angeschlossene Druckleitung wird das System mit Hydraulikflüssigkeit beaufschlagt, wobei durch den Hydraulikdruck der Schieber 7 aus der Grundposition gemäß Figur 1 nach rechts verschoben wird, wodurch der Verbindungskanal 63 freigegeben sowie der Ablaufkanal 64 verschlossen wird (vgl. Figur 2). In der Grundstellung gemäß Figur 1 ist der äußere Kolben 2 über die Rückstellfeder 4 vollständig in den äußeren Zylinderraum 11 des Zylindergehäuses 1 eingefahren.The system is acted upon by hydraulic fluid via a pressure line connected to the connection 62, with the slide 7 being moved from the basic position by the hydraulic pressure Figure 1 is shifted to the right, whereby the connection channel 63 is released and the drain channel 64 is closed (cf. Figure 2 ). In the basic position according to Figure 1 the outer piston 2 is completely retracted into the outer cylinder chamber 11 of the cylinder housing 1 via the return spring 4.

Die über den Anschluss 62 des Zylinderkopfes 6 zugeführte Hydraulikflüssigkeit wird zunächst über den Verbindungskanal 63 in den äußeren Zylinderraum 11 gepresst sowie auch durch den Ringspalt zwischen dem Dichtrohr 8 und der von diesem durchdrungenen Dichtmuffe 22. Durch den ansteigenden Hydraulikdruck wird der äußere Kolben 2 gemeinsam mit dem in dessen inneren Zylinderraum 21 angeordneten inneren Kolben 3 in die in Figur 2 dargestellte Schneidstellung bewegt. Dabei gelangt der Dichtbereich 83 des Dichtrohres 8 in eine abdichtende Position in der Dichtmuffe 22 des äußeren Kolbens 2, wodurch der innere Zylinderraum 21 gegenüber dem äußeren Zylinderraum 11 des Zylindergehäuses 1 abgedichtet ist, wie in Figur 3 wiedergegeben ist. Der Schneidvorgang des Stanz- und Bördelwerkzeuges 5 ist hier beendet. Der gesamte Hydraulikdruck beaufschlagt nunmehr ausschließlich den äußeren Kolben 2, so dass dessen Vorschubweg nach unten in die in Figur 4 dargestellte Position fortgesetzt wird. Über das mit dem Außenkolben 2 verbundene Bördelwerkzeug des oberen Werkzeugteils 52 erfolgt über den weiteren Vorschub die Bördelung der Öse (vgl. Figur 5). Nach Abschluss des Bördelvorgangs wird der an dem Anschluss 62 anliegende Druck weggenommen, wodurch der Schieber über die Schraubenfeder 71 nach links bewegt wird. Hierdurch wird der Verbindungskanal 63 über den Schieber 7 verschlossen sowie gleichzeitig der Ablaufkanal 64 zum Tank freigegeben. Das unter Druck stehende Hydrauliköl in dem äußeren Zylinderraum 11 kann nun abfließen; der äußere Kolben 2 wird über die Rückstellfeder 4 wieder in das Zylindergehäuse 1 bewegt, wodurch die in Figur 1 wiedergegebene Grundstellung hergestellt ist.The hydraulic fluid supplied via the connection 62 of the cylinder head 6 is first pressed into the outer cylinder space 11 via the connecting channel 63 and also through the annular gap between the sealing tube 8 and the sealing sleeve 22 penetrated by it. The increasing hydraulic pressure makes the outer piston 2 together the inner piston 3 arranged in its inner cylinder space 21 into the in Figure 2 shown cutting position moves. The sealing region 83 of the sealing tube 8 comes into a sealing position in the sealing sleeve 22 of the outer piston 2, as a result of which the inner cylinder space 21 is sealed off from the outer cylinder space 11 of the cylinder housing 1, as in FIG Figure 3 is reproduced. The cutting process of the punching and flanging tool 5 has ended here. The entire hydraulic pressure now acts exclusively on the outer piston 2, so that its feed path down into the in Figure 4 shown position is continued. The eyelet is flanged via the flanging tool of the upper tool part 52 connected to the outer bulb 2 (cf. Figure 5 ). After the flanging process has been completed, the pressure applied to the connection 62 is released, as a result of which the slide is moved to the left via the coil spring 71. As a result, the connecting channel 63 is closed via the slide 7 and at the same time the drain channel 64 is released to the tank. The pressurized hydraulic oil in the outer cylinder chamber 11 can now flow away; the outer piston 2 is moved back into the cylinder housing 1 via the return spring 4, whereby the in Figure 1 reproduced basic position is established.

Claims (9)

  1. Device for inserting eyelets into a textile or plastic tarpaulin comprising a punching and flanging tool (5) with an upper tool part (53), which can be moved against a stationary lower tool part (53) via a hydraulically operable double piston arrangement, which double piston arrangement comprises a first, outer piston (2) sealingly guided in the first, outer cylinder chamber (11) of a cylinder housing (1), which in turn has a second, inner cylinder chamber (21), in which a second, inner piston (3) is sealingly guided, wherein the outer cylinder chamber (11) and the inner cylinder chamber (21) can be filled via a single hydraulic feed for lowering the upper tool part (53), wherein after reaching the lowered cutting position of the inner piston (3), the outer piston (2) with the flanging part of the upper tool part (53) can be additionally lowered and wherein at least one return spring (4) is arranged for lifting the upper tool part (53) into the normal position after completion of the operation, characterised in that the at least one return spring (4) is arranged surrounding the outer piston (3) in the outer cylinder chamber (11).
  2. Device according to claim 1, characterised in that the cylinder housing (1) is narrowed in diameter at its end of the outer cylinder chamber (11) facing the upper tool part (53), which narrowing forms a shoulder (12) for the abutment of the return spring (4).
  3. Device according to claim 2, characterised in that a slip ring (13) for guiding the outer piston (2) is inserted in the narrowing in diameter forming the shoulder (12).
  4. Device according to one of the previous claims, characterised in that a flange ring (23) is arranged on the outer piston (2) at its end facing away from the upper tool part (53), which has an outwardly directed, circumferential collar (24) for the abutment of the return spring (4).
  5. Device according to claim 4, characterised in that the flange ring (23) has an internal thread, with which it is screwed on an external thread arranged outside on the outer piston (2).
  6. Device according to claim 4 or 5, characterised in that the collar (24) of the flange ring (23) is provided on its side opposite the return spring (4) with a sealing ring (25) projecting beyond the collar (24).
  7. Device according to one of the previous claims, characterised in that the cylinder housing (1) has a cylinder head (6), which is provided with hydraulic channels, wherein a main channel (61) is arranged for the connection to a hydraulic oil source, in which a connecting channel (63) for the outer cylinder chamber (11) and a drain channel (64) to a hydraulic fluid tank are arranged axially at a distance from one another and wherein in the main channel (61) a slide (7) prestressed via a spring (71) is arranged, via which the connecting channel (63) or the drain channel (64) can be closed in dependence of the applied pressure.
  8. Device according to claim 7, characterised in that in the cylinder head (6) a bypass channel (65) is arranged for the connection of a sealing pipe (8) projecting into the inner cylinder chamber (21) to the outer cylinder chamber (11).
  9. Device according to claim 8, characterised in that the bypass channel (65) is connected to the hydraulic fluid tank via a throttle valve (66).
EP18151375.5A 2018-01-12 2018-01-12 Device for inserting eyelets into a textile or plastic tarpaulin Active EP3510883B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18151375.5A EP3510883B1 (en) 2018-01-12 2018-01-12 Device for inserting eyelets into a textile or plastic tarpaulin

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18151375.5A EP3510883B1 (en) 2018-01-12 2018-01-12 Device for inserting eyelets into a textile or plastic tarpaulin

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EP3510883A1 EP3510883A1 (en) 2019-07-17
EP3510883B1 true EP3510883B1 (en) 2020-07-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112826165B (en) * 2021-03-02 2022-07-29 山东省科创服饰有限公司 Air hole installation fixing device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3742418A1 (en) * 1987-12-15 1989-07-06 Johannes Than DEVICE FOR PUNCHING EYES IN TEXTILE, PLASTIC COVER OR THE LIKE
DE4338288A1 (en) * 1993-11-10 1995-05-11 Prym William Gmbh & Co Kg Pressurized medium-operated press, in particular hydraulic eyelet press, for punching webs and setting eyelets that reinforce the hole on the edge
DE202010005653U1 (en) * 2010-06-16 2011-10-14 Franz Miederhoff Ohg Eyeletting machine

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* Cited by examiner, † Cited by third party
Title
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