EP0622175B1 - Hand-operated press - Google Patents

Hand-operated press Download PDF

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Publication number
EP0622175B1
EP0622175B1 EP94101258A EP94101258A EP0622175B1 EP 0622175 B1 EP0622175 B1 EP 0622175B1 EP 94101258 A EP94101258 A EP 94101258A EP 94101258 A EP94101258 A EP 94101258A EP 0622175 B1 EP0622175 B1 EP 0622175B1
Authority
EP
European Patent Office
Prior art keywords
press
cam
stroke
return
pin
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.)
Expired - Lifetime
Application number
EP94101258A
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German (de)
French (fr)
Other versions
EP0622175A1 (en
Inventor
Werner Dipl.-Ing. Schubert
Erich Dipl.-Ing. Weisser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG
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Gebrueder Schmidt Fabrik fuer Feinmechanik GmbH and Co KG
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Publication of EP0622175A1 publication Critical patent/EP0622175A1/en
Application granted granted Critical
Publication of EP0622175B1 publication Critical patent/EP0622175B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/12—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by hand or foot
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/24—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by rack-and-pinion means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/28—Arrangements for preventing distortion of, or damage to, presses or parts thereof
    • B30B15/288—Arrangements for preventing distortion of, or damage to, presses or parts thereof preventing over-run or reverse-run of the press shaft

Definitions

  • the invention relates to a manually operated press according to the preamble of claim 1.
  • Such hand-operated presses which are mainly used in piecework, require a force that increases towards the end of the downward stroke.
  • the operators therefore tend to carry out the work or press stroke only incompletely and to initiate the relaxation stroke (return stroke) before the intended bottom dead center of the press ram has been reached.
  • this leads to rejects or at least inferior quality of the pressed objects.
  • Such a return stroke lock is for example from the DE 35 33 003 C2 known.
  • the operating lever of this toggle press is connected to a return stroke lock, which only releases the return movement of the operating lever when the end point of the downward movement has been reached.
  • a pulling bracket is rotatably connected to a movable part of the press, the other end of which is coupled to a toothed wheel via a freewheel.
  • a pin is arranged in the axis of the freewheel, which projects axially beyond the gearwheel and is positively guided in a control cam of a cam bracket attached to the press.
  • the first gear To initiate the return stroke, the first gear must therefore be lifted off the second gear.
  • the pin guided in the control curve is guided in a first part of the control curve up to a reversal point which corresponds to the bottom dead center of the press ram, in order then to be returned to a second part of the control curve.
  • This part of the cam is designed such that the first gear comes out of engagement with the second gear, so that the return movement and thus the return stroke of the press is made possible.
  • the space required for the return stroke lock is very large, since a relative movement of the two gearwheels is provided over a larger circular arc segment.
  • the cam carrier with the control cam attached therein must also be correspondingly voluminous be interpreted.
  • the return stroke lock represents an essential part of the overall device in terms of volume.
  • the construction is also relatively complex.
  • this return stroke lock requires two gearwheels, each with mutually coordinated gears, with a free-wheeling mechanism to be integrated into the axis of the first gearwheel.
  • the cam carrier has to be manufactured with a relatively complex geometry, in particular this applies to the attachment of the control cam.
  • the invention was therefore based on the problem of further developing a manually operated press of the type mentioned at the outset in such a way that it no longer has the disadvantages mentioned.
  • the design of the return stroke lock should be simplified and at the same time a more compact design should be realized.
  • the invention is based on the idea of designing the return stroke lock in the form of two coaxially arranged disks which can be rotated relative to one another.
  • the first disc is firmly attached to the press as a bearing disc and receives a locking pin radially and axially displaceable.
  • the second disc is designed as a cam and with a pivot axis, for. B. the bearing pin of the actuating lever, rotatably coupled.
  • the control curve has, in the manner of a groove, four curve sections which merge into one another and which at least partly have a different groove depth and partly merge into one another in steps.
  • the locking pin is turned on by pivoting the operating lever Run along the bottom of the control curve.
  • Heel-like transitions of the individual curve sections prevent premature return to one of the curve sections that have already been passed, so that the press stroke must be carried out completely until bottom dead center is reached in order to be able to return the actuating lever and thus the press ram to the starting position.
  • a return stroke lock can be realized which requires an extremely small amount of space. It is also made up of a few parts that are easy to manufacture. Most parts, especially the bearing and cam disc, can be inexpensively manufactured as turned parts, to which only a few recesses and attachments need to be made. Complicated mechanisms in the form of a freewheel or gearing are completely unnecessary.
  • the return stroke lock requires negligible actuation forces in practice, since only low frictional forces occur due to the sliding friction between the locking pin and the control cam.
  • some of the curve sections have axially continuous, slot-shaped recesses, so that the locking bolt can be lifted off the groove base and pushed back if necessary, and thus a return stroke movement is also possible before bottom dead center is reached.
  • a return stroke option is advantageously preferred in those applications in which the bottom dead center position of the press ram cannot be reached, for example as a result of defective parts.
  • the angular position of the cam disk can be adjusted with respect to the pivot pin of the actuating lever.
  • the return stroke lock can in principle any desired press stroke, i. H. the predetermined and set lower dead center position can be adjusted. This is particularly important for rack-and-pinion presses, which allow a largely free choice of press stroke and bottom dead center.
  • the device according to the invention has proven to be extremely wear-resistant since it has only a few moving components. It also has extremely low noise levels when actuated.
  • a slide unit 100 is attached to a press frame (not shown here).
  • the slide unit 100 rotatably supports a pivot pin 50 which, depending on the embodiment of the press, is either connected directly (gear rack press) or indirectly (toggle press) to an actuating lever 60 in a rotationally fixed manner.
  • a pinion 59 is attached to the pivot pin 50, which meshes with a rack 101 guided vertically in the slide unit 100. A vertical movement of the rack 101 is therefore effected by a pivoting movement of the actuating lever 60.
  • a toggle mechanism 111 is coupled to the pivot pin 50 in such a way that, in a manner similar to that in the rack press, a pivoting movement of the actuating lever 60 leads to a rotary movement of the pivot pin 50.
  • the current angular position of the pivot pin 50 corresponds in each case to a specific position of the hand lever 60 and thus with the current position of a press ram not shown here or only indicated by dash-dotted lines.
  • the stroke movement of the press ram between an upper and a lower dead center corresponds to a rotary movement of the pivot pin 50 between two angular positions. This connection is used in the design of the return stroke lock described in more detail below.
  • a bearing disk 20 is attached to the press slide 100 in a rotationally fixed manner by means of fastening screws 29.
  • the pivot pin 50 is guided coaxially through the bearing plate 20, in such a way that the rotational movement of the pivot pin 50 is not hindered.
  • a cam disk 10 is attached to the pivot pin 50 coaxially and at a short distance from the bearing disk 20, so that a movement of the actuating lever 60 leads to a rotary movement of the cam disk 10 with respect to the stationary bearing disk 20.
  • the cam disc 10 has a groove-shaped control cam 11, in which a locking pin 40 is positively engaged.
  • the locking pin 40 is mounted both radially and axially displaceably in the bearing disc 20.
  • a link guide 21 is provided on the bearing disc 20 in a radial arrangement.
  • a sliding block 30 is mounted radially displaceably within the sliding block guide 21.
  • a spring 39 presses the sliding block 30 radially inwards.
  • the sliding block 30 in turn carries near its radially inward end an axially displaceable locking pin 40, which is pressed axially outwards by a spring 49 against the cam 10 arranged next to it.
  • This type of storage makes the locking pin 40 brought to the groove bottom of the control curve 11 to the system.
  • the locking pin 40 is pressed against radial flank sections of the control cam 11 and deviates radially inward, provided the course of the control cam 11 permits this. Accordingly, the lifting movement of the press ram or the pivoting movement of the actuating lever is converted into a positively coupled radial and axial displacement movement of the locking bolt, whereby the design of the course of the control cam 11 described in more detail below ensures that certain sections of the control cam 11 are only traversed in one direction can and thus a premature return stroke of the press ram is prevented before reaching the bottom dead center position.
  • the course of the control curve 11 is shown in particular in FIG. 9.
  • the control curve 11 accordingly has four curve sections 11a, 11b, 11c, 11d, which at least partly have different groove depths and partly merge into one another like a step. This has the effect that the locking pin 40 can leave certain sections only in one direction, namely in the direction of the press stroke, but not in the opposite direction, which corresponds to the return stroke.
  • the control curve 11 initially has a semicircular free stroke section 11a, which has a constant groove depth.
  • the free stroke section 11a corresponds to the free stroke of the press ram, i. H. with the stroke that is defined between the top dead center and a position that is relatively close to the intended force application point of the press ram.
  • This free lift section 11a can be passed through unhindered in both directions.
  • the locking pin 40 With further downward movement of the press ram, the locking pin 40 approaches the release position 2. When this point is reached, the locking pin is pressed into a radially extending release section 11c of the control cam 11 as a result of the radially acting spring 39 and finally reaches the return position 3 at the end of the release section 11c.
  • the release portion 11c has the same groove depth as the backstop blocking portion 11b. From the return position 3, the locking bolt 40 is prevented due to the spring action from returning to the release position 2 without external influence. In the return position 3, a further downward movement of the press ram is no longer possible since the locking pin 40 cannot leave the control cam 11. The angular position of the cam plate 10 therefore corresponds to the bottom dead center of the press ram at this point.
  • both the return stroke blocking section 11b and the release section 11c are designed as axially continuous, slot-shaped recesses in the cam disk 10.
  • the locking pin 40 is accessible from the outside and can be pressed axially inward if necessary.
  • the return stroke lock can thus be unlocked, so that in the event that the press stroke is not carried out, for example due to defective parts, until the bottom dead center is reached can, but a return stroke can be initiated.
  • the slot is made over the entire width of the groove. This enables better accessibility of the locking pin 40.
  • it is necessary to provide an internal end stop for the locking pin 40 which is not shown in any more detail here, which limits its axial displacement to the outside. The end stop is to be selected so that the desired transition from the free stroke section 11a to the return stroke blocking section 11b is carried out safely.
  • the cam plate 10 is clamped on the pivot pin 50.
  • a radially extending slot 12 is provided in the cam plate 10, which allows the clamping engagement of a clamping screw 19. This also makes it possible to adjust the cam disc 10 to the press stroke to be set in each case and thus to the position of the bottom dead center by turning.
  • the top dead center position of the rack press according to FIGS. 1 to 4 can be variably adjusted by means of a stop bolt 105.
  • the stop bolt 105 can be fixed in the desired position by a fixing nut 106.
  • the stop pin 105 interacts with a corresponding stop surface 107, which is attached to the slide unit 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Description

Die Erfindung betrifft eine handbetätigbare Presse gemäß Oberbegriff des Anspruchs 1.The invention relates to a manually operated press according to the preamble of claim 1.

Derartige handbetätigbare Pressen, die vorwiegend in der Akkordarbeit angewendet werden, erfordern einen Kraftaufwand, der zum Ende des Abwärtshubes hin zunimmt. Die Bedienungspersonen neigen daher dazu, den Arbeits- bzw. Presshub nur unvollständig durchzuführen und den Entspannungshub (Rückhub) bereits vor Erreichen des vorgesehenen unteren Totpunktes des Pressenstößels einzuleiten. Dies führt infolge des nicht exakt abgeschlossenen Arbeitsvorgangs zu Ausschuß oder zumindest zu minderwertiger Qualität der gepressten Gegenstände. Es ist deshalb bereits vorgeschlagen worden, derartige Pressen mit einer Rückhubsperre auszurüsten, die die Durchführung des nächsten Presshubs erst dann erlaubt, wenn der vorangehende Presshub vollständig ausgeführt ist.Such hand-operated presses, which are mainly used in piecework, require a force that increases towards the end of the downward stroke. The operators therefore tend to carry out the work or press stroke only incompletely and to initiate the relaxation stroke (return stroke) before the intended bottom dead center of the press ram has been reached. As a result of the incompletely completed work process, this leads to rejects or at least inferior quality of the pressed objects. It has therefore already been proposed to equip such presses with a return stroke lock, which only allows the next press stroke to be carried out when the preceding press stroke has been completed.

Eine derartige Rückhubsperre ist beispielsweise aus der DE 35 33 003 C2 bekannt. Der Betätigungshebel dieser Kniehebelpresse ist mit einer Rückhubsperre verbunden, die die Rückbewegung des Betätigungshebels erst bei Erreichen des Endpunkts der Abwärtsbewegung freigibt. Mit einem beweglichen Teil der Presse ist ein Zugbügel drehbar verbunden, dessen anderes Ende über einen Freilauf mit einem Zahnrad gekoppelt ist. In der Achse des Freilaufs ist ein Zapfen angeordnet, der über das Zahnrad axial vorsteht und in einer Steuerkurve eines an der Presse angebrachten Kurventrägers zwangsgeführt ist. Während der Abwärtsbewegung des Betätigungshebels wälzt das Zahnrad auf einem feststehenden, zweiten Zahnrad ab, wobei eine Rückwärtsbewegung durch den Freilauf verhindert wird. Zu Einleitung des Rückhubs muß deshalb das erste Zahnrad vom zweiten Zahnrad abgehoben werden. Hierzu ist es erforderlich, daß der in der Steuerkurve geführte Zapfen in einem ersten Teil der Steuerkurve bis zu einem Umkehrpunkt geführt wird, der dem unteren Totpunkt des Pressenstößels entspricht, um anschließend auf einem zweitel Teil der Steuerkurve zurückgeführt zu werden. Dieser Teil der Steuerkurve ist derart angelegt, daß das erste Zahnrad außer Eingriff mit dem zweiten Zahnrad gelangt, so daß die Rückführbewegung und damit der Rückhub der Presse ermöglicht wird.Such a return stroke lock is for example from the DE 35 33 003 C2 known. The operating lever of this toggle press is connected to a return stroke lock, which only releases the return movement of the operating lever when the end point of the downward movement has been reached. A pulling bracket is rotatably connected to a movable part of the press, the other end of which is coupled to a toothed wheel via a freewheel. A pin is arranged in the axis of the freewheel, which projects axially beyond the gearwheel and is positively guided in a control cam of a cam bracket attached to the press. During the downward movement of the actuating lever, the gear wheel rolls on a fixed, second gear wheel, backward movement being prevented by the freewheel. To initiate the return stroke, the first gear must therefore be lifted off the second gear. For this purpose, it is necessary that the pin guided in the control curve is guided in a first part of the control curve up to a reversal point which corresponds to the bottom dead center of the press ram, in order then to be returned to a second part of the control curve. This part of the cam is designed such that the first gear comes out of engagement with the second gear, so that the return movement and thus the return stroke of the press is made possible.

Obwohl sich Fressen mit einer derartigen Rückhubsperre bewährt und eine weite Verbreitung gefunden haben, so sind sie mit einer Reihe von Nachteilen behaftet.Although eating with such a return stroke lock has proven itself and has become widespread, it has a number of disadvantages.

So ist der erforderliche Platzbedarf für die Rückhubsperre sehr groß, da eine Relativbewegung der beiden Zahnräder über ein größeres Kreisbogensegment hinweg vorgesehen ist. Infolge der Anbringung des Führungszapfens in der Achse des Freilaufs des ersten Zahnrades muß auch der Kurventräger mit der darin angebrachten Steuerkurve entsprechend voluminös ausgelegt werden. Insbesondere bei kleineren handbetätigbaren Pressen stellt die Rückhubsperre volumenmäßig einen wesentlichen Bestandteil der Gesamtvorrichtung dar. Auch gestaltet sich die Konstruktion relativ aufwendig. So benötigt diese Rückhubsperre zwei Zahnräder mit jeweils aufeinander abgestimmten Verzahnungen, wobei in die Achse des ersten Zahnrades ein Freilauf zu integrieren ist. Darüber hinaus ist der Kurventräger mit einer relativ komplexen Geometrie zu fertigen, insbesondere trifft dies für die Anbringung der Steuerkurve zu.The space required for the return stroke lock is very large, since a relative movement of the two gearwheels is provided over a larger circular arc segment. As a result of the attachment of the guide pin in the axis of the freewheel of the first gear wheel, the cam carrier with the control cam attached therein must also be correspondingly voluminous be interpreted. In particular in the case of smaller hand-operated presses, the return stroke lock represents an essential part of the overall device in terms of volume. The construction is also relatively complex. For example, this return stroke lock requires two gearwheels, each with mutually coordinated gears, with a free-wheeling mechanism to be integrated into the axis of the first gearwheel. In addition, the cam carrier has to be manufactured with a relatively complex geometry, in particular this applies to the attachment of the control cam.

Der Erfindung lag deshalb das Problem zugrunde, eine handbetätigbare Presse der eingangs genannten Art derart weiterzuentwickeln, daß sie die genannten Nachteile nicht mehr aufweist. Insbesondere sollte die Rückhubsperre in ihrem konstruktiven Aufbau vereinfacht und gleichzeitig eine kompaktere Bauweise realisiert werden.The invention was therefore based on the problem of further developing a manually operated press of the type mentioned at the outset in such a way that it no longer has the disadvantages mentioned. In particular, the design of the return stroke lock should be simplified and at the same time a more compact design should be realized.

Gelöst wird dieses Problem mit einer handbetätigbaren Presse gemäß Anspruch 1. Vorteilhafte Ausführungsformen der Erfindung sind durch die Merkmale der Unteransprüche angegeben.This problem is solved with a manually operated press according to claim 1. Advantageous embodiments of the invention are specified by the features of the subclaims.

Die Erfindung basiert auf der Idee, die Rückhubsperre in Form zweier koaxial angeordneter und gegeneinander verdrehbarer Scheiben zu konzipieren. Die erste Scheibe ist als Lagerscheibe fest an der Presse angebracht und nimmt einen Sperrbolzen radial und axial verschieblich auf. Die zweite Scheibe ist als Kurvenscheibe ausgeführt und mit einer Schwenkachse, z. B. dem Lagerbolzen des Betätigungshebels, verdrehfest gekoppelt. Die Steuerkurve weist nach Art einer Nut vier ineinander übergehende Kurvenabschnitte auf, die zumindest teilweise eine unterschiedliche Nuttiefe besitzen und teilweise absatzartig ineinander übergehen. Der Sperrbolzen wird durch das Verschwenken des Betätigungshebels am Nutgrund der Steuerkurve entlang geführt. Absatzartige Übergänge der einzelnen Kurvenabschnitte verhindern bei der Betätigung eine vorzeitige Rückkehr auf einen der bereits durchschrittenen Kurvenabschnitte, so daß der Presshub bis zum Erreichen des unteren Totpunktes vollständig ausgeführt werden muß, um den Betätigungshebel und damit den Pressenstößel in die Ausgangslage zurückführen zu können.The invention is based on the idea of designing the return stroke lock in the form of two coaxially arranged disks which can be rotated relative to one another. The first disc is firmly attached to the press as a bearing disc and receives a locking pin radially and axially displaceable. The second disc is designed as a cam and with a pivot axis, for. B. the bearing pin of the actuating lever, rotatably coupled. The control curve has, in the manner of a groove, four curve sections which merge into one another and which at least partly have a different groove depth and partly merge into one another in steps. The locking pin is turned on by pivoting the operating lever Run along the bottom of the control curve. Heel-like transitions of the individual curve sections prevent premature return to one of the curve sections that have already been passed, so that the press stroke must be carried out completely until bottom dead center is reached in order to be able to return the actuating lever and thus the press ram to the starting position.

Mit Hilfe dieser Konzeption läßt sich eine Rückhubsperre realisieren, die einen äußerst geringen Platzbedarf aufweist. Auch ist sie aus wenigen und zudem einfach herzustellenden Teilen aufgebaut. Die meisten Teile, insbesondere die Lager- und die Kurvenscheibe, sind kostengünstig als Drehteile zu fertigen, an welche lediglich einige Ausnehmungen und Anbauten anzubringen sind. Komplizierte Mechanismen in Form eines Freilaufs oder von Verzahnungen sind vollkommen entbehrlich.With the help of this concept, a return stroke lock can be realized which requires an extremely small amount of space. It is also made up of a few parts that are easy to manufacture. Most parts, especially the bearing and cam disc, can be inexpensively manufactured as turned parts, to which only a few recesses and attachments need to be made. Complicated mechanisms in the form of a freewheel or gearing are completely unnecessary.

Zudem erfordert die Rückhubsperre in der Praxis vernachlässigbare Betätigungskräfte, da lediglich geringe Reibungskräfte durch die Gleitreibung zwischen dem Sperrbolzen und der Steuerkurve auftreten.In addition, the return stroke lock requires negligible actuation forces in practice, since only low frictional forces occur due to the sliding friction between the locking pin and the control cam.

Gemäß einer bevorzugten Ausführungsform der Erfindung weisen einige der Kurvenabschnitte axial durchgehende, schlitzförmige Ausnehmungen auf, so daß der Sperrbolzen im Bedarfsfalle vom Nutgrund abgehoben und zurückgedrückt werden kann und damit eine Rückhubbewegung auch vor Erreichen des unteren Totpunkts möglich ist. Eine derartige Rückhubmöglichkeit ist vorteilhafterweise bei solchen Anwendungsfällen vorzuziehen, bei denen die untere Totpunktposition des Pressenstößels beispielsweise infolge fehlerhafter Teile nicht erreicht werden kann.According to a preferred embodiment of the invention, some of the curve sections have axially continuous, slot-shaped recesses, so that the locking bolt can be lifted off the groove base and pushed back if necessary, and thus a return stroke movement is also possible before bottom dead center is reached. Such a return stroke option is advantageously preferred in those applications in which the bottom dead center position of the press ram cannot be reached, for example as a result of defective parts.

Gemäß einer weiteren bevorzugten Ausführungsform ist die Winkelposition der Kurvenscheibe in Bezug auf den Schwenkbolzen des Betätigungshebels einstellbar. Auf diese Weise kann die Rückhubsperre prinzipiell jedem gewünschten Pressenhub, d. h. der vorgegebenen und eingestellten unteren Totpunktposition, angepaßt werden. Dies kommt insbesondere bei Zahnstangenpressen zum tragen, die eine weitgehend freizügige Wahl des Pressenhubs und des unteren Totpunkts zulassen.According to a further preferred embodiment, the angular position of the cam disk can be adjusted with respect to the pivot pin of the actuating lever. In this way, the return stroke lock can in principle any desired press stroke, i. H. the predetermined and set lower dead center position can be adjusted. This is particularly important for rack-and-pinion presses, which allow a largely free choice of press stroke and bottom dead center.

Die erfindungsgemäße Vorrichtung hat sich als äußerst verschleißfest erwiesen, da sie nur wenige bewegliche Bauteile besitzt. Auch weist sie bei der Betätigung eine äußerst geringe Geräuschentwicklung auf.The device according to the invention has proven to be extremely wear-resistant since it has only a few moving components. It also has extremely low noise levels when actuated.

Die Vorrichtung wird nachstehend anhand der schematischen Darstellungen in den Figuren näher erläutert. Hierbei ist zu beachten, daß auf eine vollständige Darstellung des Pressenständers verzichtet wurde. Vielmehr sind lediglich die zum Verständnis der Erfindung erforderlichen Teile dargestellt, insbesondere die an einem Pressenschieber einer herkömmlichen Handhebelpresse angebrachte Rückhubsperre in verschiedenen Betätigungspositionen des Handhebels.The device is explained below with reference to the schematic representations in the figures. Please note that the press stand has not been shown in full. Rather, only the parts necessary for understanding the invention are shown, in particular the return stroke lock attached to a press slide of a conventional hand lever press in different actuation positions of the hand lever.

Generell ist in den Figuren 1 bis 4 die Konfiguration einer Zahnstangenpresse, in den Figuren 5 bis 8 die Konfiguration einer Kniehebelpresse dargestellt. Im einzelnen zeigen:

Fig. 1:
eine Seitenansicht einer Zahnstange-Schiebereinheit, Betätigungshebel in Sperrstellung,
Fig. 2:
Schnitt A-A aus Figur 1,
Fig. 3:
Schnitt B-B aus Figur 2, Betätigungshebel in Grundstellung,
Fig. 4:
Seitenansicht der Zahnstangen-Schiebereinheit, Betätigungshebel in Rückführstellung,
Fig. 5:
Seitenansicht einer Kniehebel-Schiebereinheit, Betätigungshebel im Sperrstellung,
Fig. 6:
Schnitt A-A aus Figur 5,
Fig. 7:
Schnitt B-B aus Figur 6, Betätigungshebel in Grundstellung,
Fig. 8:
Seitenansicht der Kniehebel-Schiebereinheit, Betätigungshebel in Rückführstellung
Fig. 9:
Ausschnittsvergrößerung der Kurvenscheibe.
In general, the configuration of a rack and pinion press is shown in FIGS. 1 to 4, and the configuration of a toggle lever press is shown in FIGS. 5 to 8. In detail show:
Fig. 1:
a side view of a rack and slide unit, operating lever in the locked position,
Fig. 2:
Section AA from FIG. 1,
Fig. 3:
Section BB from Figure 2, operating lever in the basic position,
Fig. 4:
Side view of the rack and slide unit, Operating lever in return position,
Fig. 5:
Side view of a toggle lever and slide unit, operating lever in the locked position,
Fig. 6:
Section AA from FIG. 5,
Fig. 7:
Section BB from Figure 6, operating lever in the basic position,
Fig. 8:
Side view of the toggle lever and slide unit, operating lever in the return position
Fig. 9:
Enlarged section of the cam.

An einem hier nicht dargestellten Pressengestell ist eine Schiebereinheit 100 befestigt. Die Schiebereinheit 100 nimmt einen Schwenkbolzen 50 drehbar lagernd auf, welcher je nach Ausführungsform der Presse entweder unmittelbar (Zahnstangenpresse) oder mittelbar (Kniehebelpresse) mit einem Betätigungshebel 60 drehfest verbunden ist.A slide unit 100 is attached to a press frame (not shown here). The slide unit 100 rotatably supports a pivot pin 50 which, depending on the embodiment of the press, is either connected directly (gear rack press) or indirectly (toggle press) to an actuating lever 60 in a rotationally fixed manner.

Im Falle der Zahnstangenpresse (Fig. 1 bis Fig. 4) ist am Schwenkbolzen 50 ein Ritzel 59 angebracht, welches mit einer in der Schiebereinheit 100 vertikal geführten Zahnstange 101 kämmt. Durch eine Schwenkbewegung des Betätigungshebels 60 wird deshalb eine Vertikalbewegung der Zahnstange 101 bewirkt.In the case of the rack press (FIGS. 1 to 4), a pinion 59 is attached to the pivot pin 50, which meshes with a rack 101 guided vertically in the slide unit 100. A vertical movement of the rack 101 is therefore effected by a pivoting movement of the actuating lever 60.

Im Falle der Kniehebelpresse (Fig. 5 bis Fig. 8) ist eine Kniehebelmechanik 111 mit dem Schwenkbolzen 50 derart gekoppelt, daß in ähnlicher Weise wie im Falle der Zahnstangenpresse eine Schwenkbewegung des Betätigungshebels 60 zu einer Drehbewegung des Schwenkbolzens 50 führt. Durch die mittelbare oder unmittelbare Kopplung des Schwenkbolzens 50 mit dem Betätigungshebel 60 einerseits und der Zahnstange 101 bzw. der Kniehebelmechanik 111 andererseits korrespondiert die aktuelle Winkelposition des Schwenkbolzens 50 jeweils mit einer bestimmten Stellung des Handhebels 60 und damit mit der augenblicklichen Lage eines hier nicht näher dargestellten bzw. lediglich strichpunktiert angedeuteten Pressenstößels. Der Hubbewegung des Pressenstößels zwischen einem oberen und einem unteren Totpunkt entspricht eine Drehbewegung des Schwenkbolzens 50 zwischen zwei Winkelpositionen. Von diesem Zusammenhang wird bei der Konzeption der nachstehend näher beschriebenen Rückhubsperre Gebrauch gemacht.In the case of the toggle press (FIGS. 5 to 8), a toggle mechanism 111 is coupled to the pivot pin 50 in such a way that, in a manner similar to that in the rack press, a pivoting movement of the actuating lever 60 leads to a rotary movement of the pivot pin 50. Through the indirect or direct coupling of the pivot pin 50 with the actuating lever 60 on the one hand and the rack 101 or the toggle mechanism 111 on the other hand, the current angular position of the pivot pin 50 corresponds in each case to a specific position of the hand lever 60 and thus with the current position of a press ram not shown here or only indicated by dash-dotted lines. The stroke movement of the press ram between an upper and a lower dead center corresponds to a rotary movement of the pivot pin 50 between two angular positions. This connection is used in the design of the return stroke lock described in more detail below.

Eine Lagerscheibe 20 ist am Pressenschieber 100 drehfest mit Hilfe von Befestigungsschrauben 29 angebracht. Der Schwenkbolzen 50 ist koaxial durch die Lagerscheibe 20 hindurch geführt, und zwar derart, daß die Drehbewegung des Schwenkbolzens 50 nicht behindert wird.A bearing disk 20 is attached to the press slide 100 in a rotationally fixed manner by means of fastening screws 29. The pivot pin 50 is guided coaxially through the bearing plate 20, in such a way that the rotational movement of the pivot pin 50 is not hindered.

Koaxial und im geringen Abstand zur Lagerscheibe 20 ist eine Kurvenscheibe 10 am Schwenkbolzen 50 angebracht, so daß eine Bewegung des Betätigungshebels 60 zu einer Drehbewegung der Kurvenscheibe 10 in Bezug auf die ortsfeste Lagerscheibe 20 führt.A cam disk 10 is attached to the pivot pin 50 coaxially and at a short distance from the bearing disk 20, so that a movement of the actuating lever 60 leads to a rotary movement of the cam disk 10 with respect to the stationary bearing disk 20.

Die Kurvenscheibe 10 weist eine nutförmige Steuerkurve 11 auf, in welcher ein Sperrbolzen 40 zwangsgeführt im Eingriff ist. Der Sperrbolzen 40 ist sowohl radial als auch axial verschieblich in der Lagerscheibe 20 gelagert. Hierzu ist in radialer Anordnung eine Kulissenführung 21 an der Lagerscheibe 20 vorgesehen. Innerhalb der Kulissenführung 21 ist ein Kulissenstein 30 radial verschieblich gelagert. Eine Feder 39 drückt den Kulissenstein 30 radial nach innen. Der Kulissenstein 30 trägt seinerseits in der Nähe seines radial nach innen gerichteten Endes einen axial verschiebbaren Sperrbolzen 40, der durch eine Feder 49 axial nach außen gegen die benachbart angeordnete Kurvenscheibe 10 gedrückt wird. Durch diese Art der Lagerung wird der Sperrbolzen 40 am Nutgrund der Steuerkurve 11 zur Anlage gebracht. Weiterhin wird der Sperrbolzen 40 gegen radiale Flankenabschnitte der Steuerkurve 11 gedrückt und weicht radial nach innen aus, sofern der Verlauf der Steuerkurve 11 dies zuläßt. Demnach wird die Hubbewegung des Pressenstößels bzw. die Schwenkbewegung des Betätigungshebels in eine zwangsgekoppelte radiale und axiale Verschiebebewegung des Sperrbolzens umgesetzt, wobei durch die nachstehend näher beschriebene Ausgestaltung des Verlaufs der Steuerkurve 11 sichergestellt ist, daß bestimmte Abschnitte der Steuerkurve 11 lediglich in einer Richtung durchlaufen werden können und somit ein vorzeitiger Rückhub des Pressenstößels vor Erreichen der unteren Totpunktlage verhindert wird.The cam disc 10 has a groove-shaped control cam 11, in which a locking pin 40 is positively engaged. The locking pin 40 is mounted both radially and axially displaceably in the bearing disc 20. For this purpose, a link guide 21 is provided on the bearing disc 20 in a radial arrangement. A sliding block 30 is mounted radially displaceably within the sliding block guide 21. A spring 39 presses the sliding block 30 radially inwards. The sliding block 30 in turn carries near its radially inward end an axially displaceable locking pin 40, which is pressed axially outwards by a spring 49 against the cam 10 arranged next to it. This type of storage makes the locking pin 40 brought to the groove bottom of the control curve 11 to the system. Furthermore, the locking pin 40 is pressed against radial flank sections of the control cam 11 and deviates radially inward, provided the course of the control cam 11 permits this. Accordingly, the lifting movement of the press ram or the pivoting movement of the actuating lever is converted into a positively coupled radial and axial displacement movement of the locking bolt, whereby the design of the course of the control cam 11 described in more detail below ensures that certain sections of the control cam 11 are only traversed in one direction can and thus a premature return stroke of the press ram is prevented before reaching the bottom dead center position.

Der Verlauf der Steuerkurve 11 ist insbesondere in Fig. 9 dargestellt. Die Steuerkurve 11 weist demnach vier Kurvenabschnitte 11a, 11b, 11c, 11d auf, die zumindest teilweise unterschiedliche Nuttiefen besitzen und teilweise absatzartig ineinander übergehen. Hierdurch wird bewirkt, daß der Sperrbolzen 40 bestimmte Teilabschnitte lediglich in einer, nämlich in Richtung des Presshubs, verlassen kann, nicht jedoch in entgegengesetzter Richtung, die mit dem Rückhub korrespondiert.The course of the control curve 11 is shown in particular in FIG. 9. The control curve 11 accordingly has four curve sections 11a, 11b, 11c, 11d, which at least partly have different groove depths and partly merge into one another like a step. This has the effect that the locking pin 40 can leave certain sections only in one direction, namely in the direction of the press stroke, but not in the opposite direction, which corresponds to the return stroke.

Die Steuerkurve 11 weist zunächst einen halbkreisförmigen Freihubabschnitt 11a auf, der eine konstante Nuttiefe besitzt. Der Freihubabschnitt 11a korrespondiert mit dem Freihub des Pressenstößels, d. h. mit dem Hub, der zwischen dem oberen Totpunkt und einer Position definiert ist , die relativ dicht vor dem vorgesehenen Kraftangriffspunkt des Pressenstößels liegt. Dieser Freihubabschnitt 11a kann in beiden Richtungen ungehindert durchlaufen werden.The control curve 11 initially has a semicircular free stroke section 11a, which has a constant groove depth. The free stroke section 11a corresponds to the free stroke of the press ram, i. H. with the stroke that is defined between the top dead center and a position that is relatively close to the intended force application point of the press ram. This free lift section 11a can be passed through unhindered in both directions.

Hieran schließt sich in Fortsetzung des Kreisbogens ein Rückhubsperrabschnitt 11b an, wobei der Übergang absatzartig ausgebildet ist. Die Nuttiefe im Rückhubsperrabschnitt 11b ist größer als die jenige im Freihubabschnitt 11a. Bei Überschreiten des Absatzes gleitet der Sperrbolzen 40 infolg der Wirkung der Feder 49 in den Rückhubsperrabschnitt 11b hinein. Damit ist die Sperrstellung 1 erreicht, ein Rückübergang in den davorliegenden Freihubaschnitt 11a ist nicht mehr möglich, da der Sperrbolzen 40 am Absatz zur Anlage kommt.This is continued in a continuation of the circular arc Rückhubsperrabschnitt 11b, wherein the transition is formed shoulder. The groove depth in the return stroke blocking portion 11b is larger than that in the free stroke portion 11a. When the heel is exceeded, the locking pin 40 slides into the return stroke locking section 11b as a result of the action of the spring 49. The locking position 1 is thus reached, a return to the free stroke cut 11a lying in front of it is no longer possible, since the locking pin 40 comes to rest on the shoulder.

Bei weiterer Abwärtsbewegung des Pressenstößels nähert sich der Sperrbolzen 40 der Freigabestellung 2. Bei Erreichen dieses Punktes wird der Sperrbolzen infolge der radial wirkenden Feder 39 in einen radial verlaufenden Freigabeabschnitt 11c der Steuerkurve 11 hineingedrückt und erreicht schließlich die Rückführstellung 3 am Ende des Freigabeabschnitts 11c.With further downward movement of the press ram, the locking pin 40 approaches the release position 2. When this point is reached, the locking pin is pressed into a radially extending release section 11c of the control cam 11 as a result of the radially acting spring 39 and finally reaches the return position 3 at the end of the release section 11c.

Der Freigabeabschnitt 11c besitzt die gleiche Nuttiefe wie der Rückhubsperrabschnitt 11b. Aus der Rückführstellung 3 heraus ist infolge der Federwirkung der Sperrbolzen 40 daran gehindert, ohne Einwirkung von außen in Richtung auf die Freigabestellung 2 zurückzukehren. In der Rückführstellung 3 ist eine weitere Abwärtsbewegung des Pressenstößels nicht mehr möglich, da der Sperrbolzen 40 die Steuerkurve 11 nicht verlassen kann. Die erreichte Winkelstellung der Kurvenscheibe 10 entspricht daher in diesem Punkt dem unteren Totpunkt des Pressenstößels.The release portion 11c has the same groove depth as the backstop blocking portion 11b. From the return position 3, the locking bolt 40 is prevented due to the spring action from returning to the release position 2 without external influence. In the return position 3, a further downward movement of the press ram is no longer possible since the locking pin 40 cannot leave the control cam 11. The angular position of the cam plate 10 therefore corresponds to the bottom dead center of the press ram at this point.

Bei Erreichen der Rückführstellung 3 ist deshalb lediglich eine Drehbewegung in entgegengesetzter Richtung und damit der Rückhub möglich. Der Rückhub des Pressenstößels bewirkt, daß der Sperrbolzen 40 in einen Rückführungsabschnitt 11d der Steuerkurve eintritt und sich der Freihubstellung 4 nähert und schließlich in den Freihubabschnitt 11a zurückkehrt. Hierzu ist es allerdings erforderlich, daß die Nuttiefe im Rückführungsabschnitt 11d in Bewegungsrichtung abnimmt, so daß der Sperrbolzen 40 auf das niedrigere Niveau des Freihubabschnitts 11a zwangsgeführt angehoben werden kann. Die Nuttiefe im Rückführungsabschnitt 11d nimmt am Übergang zum Freihubabschnitt 11a soweit ab, daß ein weiterer Absatz entsteht und der Sperrbolzen 40 bei Erreichen der Freihubstellung 4 nach unten in den Freihubabschnitt 11a hineingleiten kann. Der absatzartige Übergang ist deshalb erforderlich, um sicherzustellen , daß der Sperrbolzen 40 bei einer erneuten Abwärtsbewegung des Pressenstößels in Richtung auf den Rückhubsperrabschnitt 11b geleitet wird und nicht in den Rückführungsabschnitt 11d zurückgleiten kann.When return position 3 is reached, therefore, only a rotary movement in the opposite direction and thus the return stroke is possible. The return stroke of the press ram causes the locking pin 40 to enter a return section 11d of the control cam and to reach the free stroke position 4 approaches and finally returns to the free lift section 11a. For this purpose, however, it is necessary that the groove depth in the return section 11d decreases in the direction of movement, so that the locking pin 40 can be positively lifted to the lower level of the free lift section 11a. The groove depth in the return section 11d decreases at the transition to the free lift section 11a to such an extent that a further step is created and the locking bolt 40 can slide down into the free lift section 11a when the free lift position 4 is reached. The step-like transition is therefore necessary to ensure that when the press ram moves downward again, the locking pin 40 is guided in the direction of the return stroke locking section 11b and cannot slide back into the return section 11d.

Der durch die Positionen "Sperrstellung 1" - "Freigabestellung 2" - "Rückführstellung 3" - "Freihubstellung 4" definierte Verlauf der Steuerkurve 11 kann deshalb nur in der vorgegebenen Richtung durchlaufen werden, die es zwangsweise erfordert, den Presshub bis zum unteren Totpunkt vollständig durchzuführen. In der Freihubstellung 4 besteht die Möglichkeit, eine Drehbewegung in beide Richtungen einzuleiten und somit gewünschtenfalls zum oberen Totpunkt des Pressenstößels zurückzukehren.The course of the control cam 11 defined by the positions "blocking position 1" - "release position 2" - "return position 3" - "free stroke position 4" can therefore only be traversed in the predetermined direction, which inevitably requires the press stroke to be completely at bottom dead center perform. In the free lift position 4, there is the possibility of initiating a rotary movement in both directions and thus, if desired, returning to the top dead center of the press ram.

Im dargestellten, bevorzugten Ausführungsbeispiel sind sowohl der Rückhubsperrabschnitt 11b als auch der Freigabeabschnitt 11c als axial durchgehende, schlitzförmige Ausnehmungen in der Kurvenscheibe 10 ausgebildet. Hierdurch ist der Sperrbolzen 40 von außen her zugänglich und kann bei Bedarf axial nach innen gedrückt werden. Damit ist die Rückhubsperre entriegelbar, so daß für den Fall, daß der Presshub beispielsweise aufgrund fehlerhafter Teile nicht bis zum Erreichen des unteren Totpunkts ausgeführt werden kann, dennoch ein Rückhub eingeleitet werden kann.In the preferred exemplary embodiment shown, both the return stroke blocking section 11b and the release section 11c are designed as axially continuous, slot-shaped recesses in the cam disk 10. As a result, the locking pin 40 is accessible from the outside and can be pressed axially inward if necessary. The return stroke lock can thus be unlocked, so that in the event that the press stroke is not carried out, for example due to defective parts, until the bottom dead center is reached can, but a return stroke can be initiated.

Grundsätzlich ist es ausreichend, lediglich einen relativ schmalen Schlitz in diesem Abschnitt vorzusehen, um mit einem dünnen Gegenstand den Sperrbolzen 40 zurückdrücken zu können. Im dargestellten Ausführungsbeispiel ist der Schlitz jedoch über die gesamte Breite der Nut ausgeführt. Dies ermöglicht eine bessere Zugänglichkeit des Sperrbolzens 40. Allerdings ist es in einem derartigen Fall erforderlich, einen internen, hier nicht näher dargestellten Endanschlag für den Sperrbolzen 40 vorzusehen, der dessen Axialverschiebung nach außen begrenzt. Der Endanschlag ist so zu wählen, daß der gewünschte Übergang vom Freihubabschnitt 11a in den Rückhubsperrabschnitt 11b sicher vollzogen wird.Basically, it is sufficient to provide only a relatively narrow slot in this section in order to be able to press the locking pin 40 back with a thin object. In the illustrated embodiment, however, the slot is made over the entire width of the groove. This enables better accessibility of the locking pin 40. However, in such a case, it is necessary to provide an internal end stop for the locking pin 40, which is not shown in any more detail here, which limits its axial displacement to the outside. The end stop is to be selected so that the desired transition from the free stroke section 11a to the return stroke blocking section 11b is carried out safely.

Die Kurvenscheibe 10 ist im dargestellten, bevorzugten Ausführungsbeispiel am Schwenkbolzen 50 klemmend befestigt. Aus diesem Grund ist ein radial verlaufender Schlitz 12 in der Kurvenscheibe 10 angebracht, der dem klemmenden Eingriff einer Klemmschraube 19 erlaubt. Hierdurch ist es auch möglich, die Kurvenscheibe 10 auf den jeweils einzustellenden Pressenhub und damit auf die Position des unteren Totpunkts durch Verdrehen abzustimmen.In the preferred exemplary embodiment shown, the cam plate 10 is clamped on the pivot pin 50. For this reason, a radially extending slot 12 is provided in the cam plate 10, which allows the clamping engagement of a clamping screw 19. This also makes it possible to adjust the cam disc 10 to the press stroke to be set in each case and thus to the position of the bottom dead center by turning.

Die obere Totpunktlage der Zahnstangenpresse gemäß Fig. 1 bis Fig. 4 ist durch einen Anschlagbolzen 105 variabel einstellbar. Der Anschlagbolzen 105 ist in der gewünschten Stellung durch eine Fixiermutter 106 festlegbar. Der Anschlagbolzen 105 wirkt mit einer korrespondierenden Anschlagfläche 107 zusammen, die an der Schiebereinheit 100 angebracht ist.The top dead center position of the rack press according to FIGS. 1 to 4 can be variably adjusted by means of a stop bolt 105. The stop bolt 105 can be fixed in the desired position by a fixing nut 106. The stop pin 105 interacts with a corresponding stop surface 107, which is attached to the slide unit 100.

FigurenlegendeFigure legend

11
SperrstellungLocked position
22nd
FreigabestellungRelease position
33rd
RückführstellungReturn position
44th
FreihubstellungFree stroke position
1010th
KurvenscheibeCam
1111
SteuerkurveControl curve
11a11a
FreihubabschnittFree stroke section
11b11b
RückhubsperrabschnittReturn stroke section
11c11c
FreigabeabschnittRelease section
11d11d
RückführungsabschnittReturn section
1212th
Schlitzslot
1919th
KlemmschraubeClamping screw
2020th
LagerscheibeBearing washer
2121
KulissenführungScenery tour
2929
BefestigungsschraubeFastening screw
3030th
KulissensteinSliding block
3939
Federfeather
4040
SperrbolzenLocking pin
4949
Federfeather
5050
SchwenkbolzenSwivel pin
5959
Ritzelpinion
6060
BetätigungshebelOperating lever
100100
SchiebereinheitSlide unit
101101
ZahnstangeRack
105105
AnschlagbolzenStop bolts
106106
FixiermutterFixing nut
107107
AnschlagflächeAbutment surface
111111
KniehebelmechanikToggle mechanism

Claims (4)

  1. A manually-operable press having an operating lever (60) swivellable manually around an axis, the downward movement of which corresponds to the press stroke and the reverse movement of which corresponds to the tension release stroke (return stroke) of the press and which is connected to a return stroke locking device (10-50), which only releases the reverse movement of the operating lever (60) when the end point of the downward movement is reached, wherein a radially displaceably mounted locking pin (40) is restrictedly guided in a groove-shaped cam (11) provided in a cam support so that a section of the cam in itself closed can only be moved in the direction corresponding to the downward movement of the operating lever (60),
    characterised in that a bearing plate (20) is mounted on the press, which bears a sliding block (30) radially inwardly displaceable against the action of a spring (39), which in turn contains a locking pin (40) which is axially outwardly moveable against the action of a spring (49),
    in that the cam support is connected as a cam plate (10) coaxially at a slight axial distance from the bearing plate (20) in a rotationally secure manner to a swivel pin (50) passed coaxially and rotatably through the bearing plate (20), which pin is coupled indirectly or directly with the operating lever (60),
    and in that the cam (11) has four cam portions (11a, 11b, 11c, 11d), namely
    a. an arc-shaped free stroke portion (11a) having a constant groove depth,
    b. a following return stroke locking portion (11b) having a groove depth enlarged in the manner of a step,
    c. a roughly radially extending releasing portion (11c) and
    d. a return portion (11d) having a continuously decreasing groove depth and a step-like transition into the free stroke portion (11a).
  2. A press according to Claim 1,
    characterized in that the return stroke locking portion (11b) and the releasing portion (11c) are constructed as axially continuous, slit-shaped recesses in the cam plate (10).
  3. A press according to Claim 1 or 2,
    characterised in that the axial displacement of the locking pin (40) is limited by end stops.
  4. A press according to one of the preceding Claims,
    characterised in that the angular position of the cam plate (10) is adjustable in relation to the swivel pin (50).
EP94101258A 1993-04-29 1994-01-28 Hand-operated press Expired - Lifetime EP0622175B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4314062 1993-04-29
DE4314062A DE4314062C2 (en) 1993-04-29 1993-04-29 Manual press

Publications (2)

Publication Number Publication Date
EP0622175A1 EP0622175A1 (en) 1994-11-02
EP0622175B1 true EP0622175B1 (en) 1996-07-24

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ID=6486694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101258A Expired - Lifetime EP0622175B1 (en) 1993-04-29 1994-01-28 Hand-operated press

Country Status (2)

Country Link
EP (1) EP0622175B1 (en)
DE (2) DE4314062C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959627A1 (en) * 1999-12-10 2001-06-21 Schmidt Feinmech Hand-operated press for job work, with emergency unlocking pin
DE102007058436A1 (en) 2007-12-05 2009-06-10 mäder pressen GmbH & Co. KG Hand operated press, has control area consisting of control surfaces, where one surface is formed as tooth surface and/or pinion surface, and another surface is formed as elastomer surface and partially overlaps former surface
CN101253039B (en) * 2005-07-13 2011-06-29 格布尔施密特法布锐克菲尔法因曼查尼克有限公司 Manually operated press having an overload protection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19528887A1 (en) * 1995-08-05 1997-02-06 Telefunken Microelectron Elbow lever press for joining housing parts - comprises column, lever and thruster together with mechanical connecting components, damper is fitted to thruster
DE10223153C1 (en) * 2002-05-16 2003-07-31 Schmidt Feinmech Hand operated press, for small-scale production in workshop, has stroke stop in form of sensor sensing movement of press ram, and coupling operated by it to prevent power transmission to ram
US7080595B2 (en) 2002-05-16 2006-07-25 Gebr. Schmidt Fabrik für Feinmechanik GmbH & Co. KG Manually operated press
CN101612801B (en) * 2008-06-27 2012-12-26 海洋王照明科技股份有限公司 Hand press
DE102011080030A1 (en) 2011-07-28 2013-01-31 Hartmut Babiel Hand-operated press

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533003A1 (en) * 1985-09-16 1987-03-26 Schmidt Feintechnik Gmbh Manually operated press
DE8621429U1 (en) * 1986-08-09 1986-10-16 Burger Söhne GmbH + Co, 7032 Sindelfingen Hand lever press
JPH0357391Y2 (en) * 1986-08-27 1991-12-27
DE8914328U1 (en) * 1989-12-06 1990-01-18 Gärtner KG, 4708 Kamen Manual press

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19959627A1 (en) * 1999-12-10 2001-06-21 Schmidt Feinmech Hand-operated press for job work, with emergency unlocking pin
DE19959627C2 (en) * 1999-12-10 2002-05-02 Schmidt Feinmech Manual press with emergency release button
US6755124B2 (en) 1999-12-10 2004-06-29 Gebr. Schmidt Fabrik Fur Feinmechanik Gmbh & Co. Kg Manually operable press having an emergency unlocking button
CN101253039B (en) * 2005-07-13 2011-06-29 格布尔施密特法布锐克菲尔法因曼查尼克有限公司 Manually operated press having an overload protection
DE102007058436A1 (en) 2007-12-05 2009-06-10 mäder pressen GmbH & Co. KG Hand operated press, has control area consisting of control surfaces, where one surface is formed as tooth surface and/or pinion surface, and another surface is formed as elastomer surface and partially overlaps former surface

Also Published As

Publication number Publication date
DE59400444D1 (en) 1996-08-29
DE4314062A1 (en) 1994-11-03
EP0622175A1 (en) 1994-11-02
DE4314062C2 (en) 1996-02-01

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