EP0997233B1 - Clamping tool, especially a clamping clip, clamping rod or clamping bench - Google Patents

Clamping tool, especially a clamping clip, clamping rod or clamping bench Download PDF

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Publication number
EP0997233B1
EP0997233B1 EP99125705A EP99125705A EP0997233B1 EP 0997233 B1 EP0997233 B1 EP 0997233B1 EP 99125705 A EP99125705 A EP 99125705A EP 99125705 A EP99125705 A EP 99125705A EP 0997233 B1 EP0997233 B1 EP 0997233B1
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EP
European Patent Office
Prior art keywords
clamping
handle
lever
tool according
arm
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.)
Revoked
Application number
EP99125705A
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German (de)
French (fr)
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EP0997233A3 (en
EP0997233A2 (en
Inventor
Stefan Blank
Klemens Degen
Zbigniew Noniewicz
Hans-Jürgen Schüller
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Wolfcraft GmbH
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Wolfcraft GmbH
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Application filed by Wolfcraft GmbH filed Critical Wolfcraft GmbH
Publication of EP0997233A2 publication Critical patent/EP0997233A2/en
Publication of EP0997233A3 publication Critical patent/EP0997233A3/en
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Publication of EP0997233B1 publication Critical patent/EP0997233B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar

Definitions

  • the invention relates to a clamping tool according to the generic term of claim 1.
  • a generic clamping tool in the form of a clamp is from German patent application DE 39 17 473 known.
  • This known clamp has one movable jaw, which at the end of a push rod sitting. This jaw passes through a housing which carries a second, fixed jaw. From the case protrudes a handle. By means of a handle that is pivotally arranged on the housing, and on the Handle can be moved, the push rod be shifted so that the movable jaw is gradually moved towards the fixed jaw.
  • the known clamp On the handling side towards the two jaws the known clamp has a released one Non-return lock in the form of a clamping lever. This should prevent the movable jaw from moving in the opposite direction can be relocated. Stands out with a free end there the lever forming the backstop from the Housing out and can be swiveled around the Release backlash. In the released position the two jaws can move in the opposite direction move apart.
  • Push rod is a rotatable, toothed rod in which engages one end of a pivotable handle.
  • By the two jaws can attack the teeth to be moved towards each other.
  • the two Back jaws to the operating handle. in the Housing sits a pawl that acts as a backlash acts.
  • Another clamp is from GB 21 78 689.
  • the Manageability of this clamp is similar to that of the utility model 87 03 379.8.
  • the invention has for its object a generic Advantageously to further develop the clamp.
  • the invention provides that the lever transmission is designed so that the active arm of the lever transmission shortened with increasing tension. at increasing elasticity, which increases when between the a workpiece is jammed in both clamping jaws leverage ratios of lever transfer in that the displacement path of the jaw becomes smaller and thus follows the leverage law applicable force is increased.
  • the relationship between load arm and power arm of the lever transmission in favor of an enlarging when the load occurs Clamping force variable.
  • the changing leverage ratios are preferably realized in that the active arm, which is on the pull or push rod acts, a shortenable arm of an operating lever is.
  • the shortenable active arm can be an application surface the slider.
  • the shortening of the active arm is achieved in that the actuating lever has a changeable bearing point formed.
  • This changeable bearing point can, for example. be realized in that the pivot bearing of the Actuating lever through a fixed bearing journal is formed and the actuating lever with a Elongated hole sits on this journal, so that the Actuating lever can shift depending on the load.
  • the Elongated hole extends in the direction of lever extension.
  • the actuating lever is preferably two-armed educated. If the first arm is formed by the active arm, so the second arm can be swiveled from the handle be trained.
  • the invention provides that the active arm in Direction of action is spring-biased. At a increasing resistance, the active arm presses on the preloaded spring. If the spring tension is exceeded the active arm can shift and thus shorten.
  • the clamp has a first jaw 1 and a second jaw 2.
  • the first jaw 1 is via detachable connections, e.g. plug connections, Screws or the like with one end 3 'of Pull or push rod 3 firmly connected.
  • the jaw 2 has a stepping gear housing which of the Push rod 3 is penetrated.
  • the stepper gearbox continues in one Handle part 33.
  • In the rest arm acts on the active arm 18 of the release lever 15 a fixed stop 35.
  • the active arm 18 has a cavity through which the train or Push rod 3 runs.
  • Parallel to the arm 18 of the Release lever 15, which is pivotable about the bearing pin 16 is a locking slide 14 on which its return side 19 engages a return spring 17 and the locking slide 14 against the direction of displacement the pull or push rod 3 is applied.
  • the opposite side 20 of the locking slide 14 rests in the rest position against a fixed stop 24.
  • the handle 10 has a cavity 13. It is in the Area of the cavity 13 designed U-shaped. In these Hollow engages the second arm 7 of an operating lever 6 a.
  • the operating lever 6 has an angular Shape and acted upon with his second arm 6 ', which forms an active arm, an area of application 9 of a take-off valve.
  • the driving slide 5 has as well as the locking slide 14 an opening through which the train or Push rod 3 protrudes. Just like the corresponding opening of the gate valve 14 has the opening of Carriage slider 5 edges to deal with the train or To be able to tilt the push rod 3.
  • the driving slide 5 is by means of a compression spring penetrated by the pull or push rod 4, which is supported on the stops 35 pressed against the stops 22, 23 such that the Push rod 3 freely through the opening of the slider 5 can slide.
  • the preload of the slider and the associated tilting with the narrow edges of the pull or push rod 3 is one Displacement of the push rod 3 only in the direction of the arrow possible.
  • the locking slide 14 can just as the driving slide 5 opposite by manipulation in the direction of the arrow be moved to the housing.
  • the relocation of the Locking slide 4 takes place by actuating the release lever 15.
  • the release lever 15 is in front of the handle 10 that one of his fingers in the free space brought between handle 10 and handle 33, the handle 10 gripping hand can be operated.
  • a release is also possible if a workpiece extends over the push rod 3 and immediately before the flight to the fixed jaw 2 lying handle 33 lies. Especially when the workpiece then comes into contact with the handle 33 is possible if the clamping clamp in the position shown in FIG stretching function shown, the handle can no longer be included.
  • the stretching function turns out to be fleeting Extension to the fixed jaw 2 protruding edge of the handle 33 even as advantageous, as this can serve additional contact surface on a workpiece.
  • the release lever 15 is roughly diagonally opposite to the fixed jaw 2 on the housing. It acts in this way on the gate valve 14, that the application of the locking slide 14 with the Arm 18 of the release lever 1 canceled the tilt position is and the locking slide 14 freely over the train or Push rod 3 can slide.
  • the arm reaches for this 18 on the attack side 19 of the locking slide 14, on which side the return spring 17 also acts.
  • the return spring 17 is tensioned arrow. Will the Release lever 15 released, the return spring pulls on the attack side 19 against the locking slide 14 Arrow.
  • This one-sided load on the release lever 15 causes a tilt 25, 26 to the opposite opening sides of the gate valve 14.
  • the locking slide jams 14 on the pull or push rod 3, so that the push rod 3 against the direction of the arrow from the return spring 17 is taken so that the two jaws 1, 2nd be moved apart.
  • FIG. 8 works in an identical manner to that in FIGS. 1 to 7 Exemplified embodiment shown, only the housing shape is designed differently and the return spring 17th is somewhat shortened.
  • the bearing pin 16 pivotable release lever 15 fork-shaped and forms an extension 21 which has a stop trains to the opposite side 20 of the gate valve 14 to press against the fixed stop 24.
  • the gearbox described above can not only on one One-handed clamps apply, but to everyone Kind of vice and especially on a clamping table.
  • a clamping table When used on a clamping table, that the jaws on two parallel to each other Spars lying across, in parallel are led to the spars and each spar is a prescribed one Has tension gear.
  • the actuation can take place in particular via a foot pedal.
  • the embodiment shown in Fig. 9 draws is characterized by an attractively designed housing shape.
  • the pivot points of release lever 15 are also located here and handle 10 on the opposite side of the Jaws 1, 2 and on the same side as the one from the lever 10, 15 protruding from the housing protrude handle 33, handle 10 and release lever 15 separate and free from the housing.
  • the release lever is diagonally opposite for a fixed jaw.
  • This variant also allows assembly the movable jaw 1 on the opposite Side 3 '' of the push rod 3. In this position can form the handle that protrudes from the housing Arm 33 in combination with the fixed jaw 2 a support function exercise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Jigs For Machine Tools (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Sawing (AREA)

Description

Die Erfindung betrifft ein Spannwerkzeug gemäß Gattungsbegriff des Anspruchs 1.The invention relates to a clamping tool according to the generic term of claim 1.

Ein gattungsgemäßes Spannwerkzeug in Form einer Spannzwinge ist aus der deutschen Patentanmeldung DE 39 17 473 bekannt. Diese bekannte Spannzwinge besitzt eine bewegliche Spannbacke, welche am Ende einer Schubstange sitzt. Diese Spannbacke durchgreift ein Gehäuse, welches eine zweite, feste Spannbacke trägt. Aus dem Gehäuse ragt ein Handgriff ab. Mittels einer Handhabe, die schwenkbar am Gehäuse angeordnet ist, und die auf den Handgriff zu bewegt werden kann, kann die Schubstange so verlagert werden, daß die bewegliche Spannbacke schrittweise auf die feste Spannbacke zu bewegt wird. Handhabenseitig in Richtung auf die beiden Spannbacken besitzt die vorbekannte Spannzwinge eine freiggebare Rückdrücksperre in Form eines Klemmhebels. Diese soll verhindern, daß die bewegliche Spannbacke in Gegenrichtung verlagert werden kann. Mit einem freien Ende ragt dort der die Rückdrücksperre bildende Hebel aus dem Gehäuse heraus und kann verschwenkt werden, um die Rückdrücksperre freizugeben. In der freigegebenen Position lassen sich die beiden Spannbacken in Gegenrichtung auseinanderbewegen.A generic clamping tool in the form of a clamp is from German patent application DE 39 17 473 known. This known clamp has one movable jaw, which at the end of a push rod sitting. This jaw passes through a housing which carries a second, fixed jaw. From the case protrudes a handle. By means of a handle that is pivotally arranged on the housing, and on the Handle can be moved, the push rod be shifted so that the movable jaw is gradually moved towards the fixed jaw. On the handling side towards the two jaws the known clamp has a released one Non-return lock in the form of a clamping lever. This should prevent the movable jaw from moving in the opposite direction can be relocated. Stands out with a free end there the lever forming the backstop from the Housing out and can be swiveled around the Release backlash. In the released position the two jaws can move in the opposite direction move apart.

Aus der amerikanischen Patentschrift 3,427,016 ist eine weitere Spannzwinge bekannt. Dort sitzt parallel zur Schubstange eine drehbare, verzahnte Stange, in welche ein Ende einer schwenkbaren Handhabe eingreift. Durch den Angriff in die Zähne können die beiden Spannbacken aufeinander zu bewegt werden. Hier liegen die beiden Spannbacken rückwärtig zur Betätigungshandhabe. Im Gehäuse sitzt eine Sperrklinke, die als Rückdrücksperre wirkt.One is from the American patent specification 3,427,016 further clamp known. There sits parallel to Push rod is a rotatable, toothed rod in which engages one end of a pivotable handle. By the two jaws can attack the teeth to be moved towards each other. Here are the two Back jaws to the operating handle. in the Housing sits a pawl that acts as a backlash acts.

Weiter ist aus der im Gebrauchsmuster 87 03 379.8 eine Spannzwinge bekannt. Bei dieser liegt der Lösehebel der Rückdrücksperre entfernt von den beweglichen Backen.There is also one in the utility model 87 03 379.8 Clamp known. This is the release lever Backstop removed from the movable jaws.

Eine weitere Spannzwinge ist aus der GB 21 78 689. Die Handhabbarkeit dieser Spannzwinge entspricht etwa derjenigen des Gebrauchsmusters 87 03 379.8.Another clamp is from GB 21 78 689. The Manageability of this clamp is similar to that of the utility model 87 03 379.8.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Spannzwinge gebrauchsvorteilhaft weiterzubilden.The invention has for its object a generic Advantageously to further develop the clamp.

Gelöst wird die Aufgabe durch die im Anspruch 1 angegebene Erfindung. Unteransprüche stellen vorteilhafte Weiterbildungen dar.The problem is solved by the one specified in claim 1 Invention. Subclaims are advantageous Trainings.

Die Erfindung sieht vor, daß die Hebelübertragung so ausgestaltet ist, daß sich der Wirkarm der Hebelübertragung bei zunehmender Spannkraft verkürzt. Bei zunehmender Spannkraft, die steigt, wenn zwischen den beiden Spannbacken ein Werkstück eingeklemmt ist, verändern sich die Hebelverhältnisse der Hebelübertragung dahingehend, daß der Verlagerungsweg der Spannbacke kleiner wird und damit dem Hebelgesetz folgend die aufbringbare Kraft vergrößert wird. Das Verhältnis zwischen Lastarm und Kraftarm der Hebelübertragung ist zugunsten einer, bei auftretender Last sich vergrößernden Spannkraft variabel. Die sich veränderten Hebelverhältnisse werden vorzugsweise dadurch realisiert, daß der Wirkarm, welcher auf die Zug- oder Schubstange wirkt, ein verkürzbarer Arm eines Betätigungshebels ist. Der verkürzbare Wirkarm kann dabei eine Beaufschlagungsfläche des Mitnahmeschiebers beaufschlagen. In einer bevorzugten Ausgestaltung ist vorgesehen, daß die verkürzbarkeit des Wirkarmes dadurch erzielt ist, daß der Betätigungshebel einen veränderbaren Lagerpunkt ausbildet. Dieser veränderbare Lagerpunkt kann bspw. dadurch realisiert sein, daß die Schwenklagerung des Betätigungshebels durch einen ortsfesten Lagerzapfen ausgebildet ist und der Betätigungshebel mit einem Langloch auf diesem Lagerzapfen sitzt, so daß sich der Betätigungshebel lastabhängig verschieben kann. Das Langloch erstreckt sich dabei in Hebelerstreckungsrichtung. Vorzugsweise ist der Betätigungshebel zweiarmig ausgebildet. Wird der erste Arm von dem Wirkarm ausgebildet, so kann der zweite Arm von der Handhabe schwenkbar ausgebildet sein. In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, daß der Wirkarm in Beaufschlagungsrichtung federvorgespannt ist. Bei einem sich erhöhendem Widerstand drückt der Wirkarm auf die vorgespannte Feder. Bei Überschreitung der Federspannung kann sich der Wirkarm verlagern und damit verkürzen.The invention provides that the lever transmission is designed so that the active arm of the lever transmission shortened with increasing tension. at increasing elasticity, which increases when between the a workpiece is jammed in both clamping jaws leverage ratios of lever transfer in that the displacement path of the jaw becomes smaller and thus follows the leverage law applicable force is increased. The relationship between load arm and power arm of the lever transmission in favor of an enlarging when the load occurs Clamping force variable. The changing leverage ratios are preferably realized in that the active arm, which is on the pull or push rod acts, a shortenable arm of an operating lever is. The shortenable active arm can be an application surface the slider. In a preferred embodiment provides that the shortening of the active arm is achieved in that the actuating lever has a changeable bearing point formed. This changeable bearing point can, for example. be realized in that the pivot bearing of the Actuating lever through a fixed bearing journal is formed and the actuating lever with a Elongated hole sits on this journal, so that the Actuating lever can shift depending on the load. The Elongated hole extends in the direction of lever extension. The actuating lever is preferably two-armed educated. If the first arm is formed by the active arm, so the second arm can be swiveled from the handle be trained. In a preferred embodiment the invention provides that the active arm in Direction of action is spring-biased. At a increasing resistance, the active arm presses on the preloaded spring. If the spring tension is exceeded the active arm can shift and thus shorten.

Zwei Ausführungsbeispiele der Erfindung werden nachfolgend anhand beigefügter Zeichnungen erläutert. Es zeigen:

Fig. 1
ein erfindungsgemäßes Spannwerkzeug in der Ausgestaltung einer Spannzwinge in einer ersten, unverspannten Stellung;
Fig. 2
eine Folgedarstellung der Fig. 1 bei betätigter Griffhandhabe im ungespannten Zustand;
Fig. 3
eine Darstellung bei teilbetätigter Handhabenbetätigung, wobei die beiden Spannbacken unter Einspannung eines Werkstückes auf Block zusammengefahren sind;
Fig. 4
eine Folgedarstellung zu Fig. 3, bei weiterbetätigter Griffhandhabe und verkürztem Griffarm;
Fig. 5
eine Folgedarstellung der Fig. 4, wobei im verspannten Zustand die Rückdrücksperre freigegeben ist;
Fig. 6
eine Folgedarstellung von Fig. 5, wobei die Spannbacken durch Betätigung der Rückdrücksperre in freigaberichtung auseinanderfahren;
Fig. 7
eine Montagevariante bei der das Spannwerkzeug als Spreizzwinge ausgebildet ist;
Fig. 8
ein zweites Ausführungsbeispiel der Erfindung; und
Fig. 9
ein drittes Ausführungsbeispiel der Erfindung.
Two embodiments of the invention are explained below with reference to the accompanying drawings. Show it:
Fig. 1
an inventive clamping tool in the configuration of a clamp in a first, untensioned position;
Fig. 2
a follow-up view of Figure 1 with the handle handle operated in the untensioned state;
Fig. 3
a representation with partially operated handle operation, the two jaws are moved together while clamping a workpiece on a block;
Fig. 4
a follow-up to Figure 3, with handle handle and shortened handle arm.
Fig. 5
a follow-up view of FIG. 4, the non-return lock being released in the tensioned state;
Fig. 6
a subsequent representation of Figure 5, wherein the jaws move apart by actuating the backstop in the release direction.
Fig. 7
an assembly variant in which the clamping tool is designed as an expanding clamp;
Fig. 8
a second embodiment of the invention; and
Fig. 9
a third embodiment of the invention.

Die Spannzwinge besitzt eine erste Spannbacke 1 und eine zweite Spannbacke 2. Die erste Spannbacke 1 ist über lösbare Verbindungen, bspw. Steckverbindungen, Schrauben oder dergleichen mit dem einen Ende 3' der Zug- oder Schubstange 3 fest verbunden. Die Spannbacke 2 besitzt ein Schrittgetriebegehäuse, welches von der Schubstange 3 durchsetzt ist.The clamp has a first jaw 1 and a second jaw 2. The first jaw 1 is via detachable connections, e.g. plug connections, Screws or the like with one end 3 'of Pull or push rod 3 firmly connected. The jaw 2 has a stepping gear housing which of the Push rod 3 is penetrated.

Das Schrittgetriebegehäuse setzt sich fort in einem Griffteil 33. Am Ansatzbereich des Griffteiles 33 befindet sich eine Drehachse 32, um welche eine Handhabe 10 von einer abgewinkelten Abstandsstellung schwenkbar ist in eine Anlagestellung an das Griffteil 33. Benachbart zur Handhabe 10 ragt aus dem Getriebegehäuse ein Arm eines Freigabehebeis 15 heraus, welcher mittels einer Druckfeder 34 dem Gehäuse gegenüber abgefedert ist. In der Ruhestellung beaufschlagt der Wirkarm 18 des Freigabehebels 15 einen ortsfesten Anschlag 35. Der Wirkarm 18 besitzt eine Höhlung, durch welche die Zug- oder Schubstange 3 verläuft. Parallel zum Wirkarm 18 des Freigabehebels 15, welcher um den Lagerstift 16 schwenkbar ist, liegt ein Sperrschieber 14, an welchem an seiner Angriffsseite 19 eine Rückstellfeder 17 angreift und den Sperrschieber 14 entgegen Verlagerungsrichtung der Zug- oder Schubstange 3 beaufschlagt. Die Gegenseite 20 des Sperrschiebers 14 ruht in der Ruhestellung gegen einen ortsfesten Anschlag 24.The stepper gearbox continues in one Handle part 33. Located at the attachment area of the handle part 33 there is an axis of rotation 32 about which a handle 10 is pivotable from an angled distance position in a contact position on the handle part 33. Adjacent an arm protrudes from the gear housing 10 a release lever 15, which by means of a Compression spring 34 is cushioned against the housing. In the rest arm acts on the active arm 18 of the release lever 15 a fixed stop 35. The active arm 18 has a cavity through which the train or Push rod 3 runs. Parallel to the arm 18 of the Release lever 15, which is pivotable about the bearing pin 16 is a locking slide 14 on which its return side 19 engages a return spring 17 and the locking slide 14 against the direction of displacement the pull or push rod 3 is applied. The opposite side 20 of the locking slide 14 rests in the rest position against a fixed stop 24.

Die Handhabe 10 besitzt eine Höhlung 13. Sie ist im Bereich der Höhlung 13 U-förmig ausgestaltet. In diese Höhlung greift der zweite Arm 7 eines Betätigungshebels 6 ein. Der Betätigungshebel 6 besitzt eine winkelförmige Gestalt und beaufschlagt mit seinem zweiten Arm 6', welcher einen Wirkarm ausbildet, eine Beaufschlagungsfläche 9 eines Mitnahmeschiebers.The handle 10 has a cavity 13. It is in the Area of the cavity 13 designed U-shaped. In these Hollow engages the second arm 7 of an operating lever 6 a. The operating lever 6 has an angular Shape and acted upon with his second arm 6 ', which forms an active arm, an area of application 9 of a take-off valve.

Der Mitnahmeschieber 5 besitzt ebenso wie der Sperrschieber 14 eine Öffnung, durch welche die Zug- oder Schubstange 3 ragt. Ebenso wie die entsprechende Öffnung des Sperrschiebers 14 besitzt die Öffnung des Mitnahmeschiebers 5 Kanten, um sich mit der Zug- oder Schubstange 3 verkanten zu können.The driving slide 5 has as well as the locking slide 14 an opening through which the train or Push rod 3 protrudes. Just like the corresponding opening of the gate valve 14 has the opening of Carriage slider 5 edges to deal with the train or To be able to tilt the push rod 3.

In der Ruhestellung wird der Mitnahmeschieber 5 mittels einer von der Zug- oder Schubstange durchsetzten Druckfeder 4, welche sich auf den Anschlägen 35 abstützt gegen die Anschläge 22, 23 derartig gepreßt, daß die Schubstange 3 frei durch die Öffnung des Mitnahmeschiebers 5 gleiten kann. Zufolge der Vorspannung des Mitnahmeschiebers und der damit einhergehenden Verkantung mit den Schmalkanten der Zug- oder Schubstange 3 ist eine Verlagerung der Schubstange 3 lediglich in Pfeilrichtung möglich.In the rest position, the driving slide 5 is by means of a compression spring penetrated by the pull or push rod 4, which is supported on the stops 35 pressed against the stops 22, 23 such that the Push rod 3 freely through the opening of the slider 5 can slide. As a result of the preload of the slider and the associated tilting with the narrow edges of the pull or push rod 3 is one Displacement of the push rod 3 only in the direction of the arrow possible.

Das Langloch 11, welches etwa im Scheitel des stumpfwinkligen Betätigungshebel 6 angeordnet ist, liegt etwa in Erstreckungsrichtung des Betätigungshebels 6 und wird von einem ortsfesten Lagerzapfen 8 durchsetzt. Auf der Seite des zweiten Armes greift eine Vorspannfeder 12 an, die im wesentlichen in Richtung der Erstreckung des Langloches wirkt und zwar so, daß ohne Gegenkraft der Wirkarm 36 seine größte Länge besitzt.The elongated hole 11, which is approximately at the apex of the obtuse angle Operating lever 6 is arranged, is about in the direction of extension of the actuating lever 6 and is penetrated by a fixed journal 8. On a bias spring engages the side of the second arm 12, which is essentially in the direction of the extension of the elongated hole acts in such a way that without counterforce the knitting arm 36 has its greatest length.

Wird die Betätigungshandhabe 10, wie in Fig. 2 dargestellt ist, gegen das Griffteil 33 verlagert, so spannt sich einerseits die Vorspannfeder 12 und andererseits wird durch die Verschwenkung des Wirkarmes 36 der Mitnahmeschieber 5 vom Armende 31 an seiner Beaufschlagungsfläche 9 beaufschlagt und gegen die Druckfeder 4 verlagert. Zufolge der Verkantung 27, 28 wird bei dieser Handhabenbetätigung die Zug- oder Schubstange 3 in Pfeilrichtung verlagert.If the operating handle 10, as shown in Fig. 2 is shifted against the handle part 33, so clamped on the one hand the biasing spring 12 and on the other hand is by the pivoting of the active arm 36 of the slider 5 from the arm end 31 on its contact surface 9 acted upon and against the compression spring 4th relocated. Due to the tilt 27, 28 is in this Handle the pull or push rod 3 in Arrow direction shifted.

Wird die Handhabe gelöst, so verlagert sich der Betätigungshebel 6 zurück. Die Feder 4 rückverlagert den Mitnahmeschieber 5 in die Ruhestellung.If the handle is released, the actuating lever moves 6 back. The spring 4 relocated the Driving slider 5 in the rest position.

Während dieser Rückverlagerung des Mitnahmeschiebers 5 bleibt die Zug- oder Schubstange unverlagert, da deren Verlagerung entgegen Pfeilrichtung zufolge der Verkantung 25, 26 des Sperrschiebers 14 mit der Zug- oder Schubstange 3 gesperrt ist. Fahren, wie in Fig. 3 dargestellt die beiden Spannbacken 1, 2 unter Einspannung eines Werkstückes 29 auf Block, so vergrößert sich die aufzubringende Kraft, um die Zug- oder Schubstange 3 gegenüber der Spannbacke zu verlagern. Von der Handhabe 10 muß eine größere Kraft aufgebracht werden. Diese Kraft wird übertragen auf den Betätigungshebel 6. Durch die sich vergrößernde Kraftkomponente in Richtung des Langloches 11 wird die Vorspannung der Feder 12 überwunden, so daß das Langloch 11 über den Lagerzapfen 8 gleiten kann, was eine Verkürzung des Hebelarmes 36 zur Folge hat. Einhergehend damit gleitet der Fortsatz 30 in der Höhlung 13 der Handhabe. Zufolge dieser Hebelverkürzung des Wirkarmes 36 kann mittels des gleichbleibenden Hebelarmes der Handhabe 10 eine größere Kraft auf die Beaufschlagungsfläche 9 aufgebracht werden, so daß mit gleichem Kraftaufwand eine größere Spannkraft zwischen den beiden Spannbacken 1 und 2 erzielbar ist, andererseits aber gewährleistet ist, daß im kraftfreien Betrieb eine hohe Schrittweite bei Handhabenbetätigung gewährleistet ist.During this displacement of the driving slide 5 the pull or push rod remains undisplaced, because of their Relocation against the direction of the arrow due to the tilt 25, 26 of the gate valve 14 with the train or Push rod 3 is locked. Drive as shown in Fig. 3 the two jaws 1, 2 under clamping of a workpiece 29 on block, so increases force to be applied to pull or push rod 3 to shift relative to the jaw. From the handle 10 a greater force must be applied. This Power is transmitted to the operating lever 6. By the increasing force component in the direction of Elongated hole 11, the bias of the spring 12 is overcome, so that the slot 11 over the bearing pin 8th can slide what a shortening of the lever arm 36 for Consequence. Accompanying this, the extension 30 slides in the cavity 13 of the handle. As a result of this reduction in leverage of the active arm 36 can by means of the constant Lever arm of the handle 10 a greater force the application surface 9 are applied so that with the same effort, a greater clamping force between the two jaws 1 and 2 can be achieved, on the other hand, it is guaranteed that in the power-free Operation a large step size with handle actuation is guaranteed.

Der Sperrschieber 14 kann ebenso wie der Mitnahmeschieber 5 durch Handhabenbetätigung in Pfeilrichtung gegenüber dem Gehäuse verlagert werden. Die Verlagerung des Sperrschiebers 4 erfolgt durch Betätigung des Freigabehebels 15. Der Freigabehebel 15 liegt so vor der Handhabe 10, daß er von den Fingern einer in den Freiraum zwischen Handhabe 10 und Griff 33 gebrachten, die Handhabe 10 griffartig fassenden Hand betätigt werden kann. Eine Freigabe ist damit auch möglich, wenn ein Werkstück sich bis über die Schubstange 3 erstreckt und unmittelbar vor dem etwa in Flucht zur festen Backe 2 liegenden Griff 33 liegt. Insbesondere, wenn das Werkstück in Anlage tritt zu dem Griff 33, es etwa dann möglich ist, wenn die Spannzwinge in der in Figur 7 dargestellten Dehnfunktion arbeitet, kann der Griff nicht mehr umfaßt werden. In der in Fig. 7 dargestellten Dehnfunktion erweist sich die in fluchtartiger Verlängerung zur festen Spannbacke 2 abragende Randkante des Griffes 33 sogar als vorteilhaft, da diese als zusätzliche Anlagefläche an ein Werkstück dienen kann.The locking slide 14 can just as the driving slide 5 opposite by manipulation in the direction of the arrow be moved to the housing. The relocation of the Locking slide 4 takes place by actuating the release lever 15. The release lever 15 is in front of the handle 10 that one of his fingers in the free space brought between handle 10 and handle 33, the handle 10 gripping hand can be operated. A release is also possible if a workpiece extends over the push rod 3 and immediately before the flight to the fixed jaw 2 lying handle 33 lies. Especially when the workpiece then comes into contact with the handle 33 is possible if the clamping clamp in the position shown in FIG stretching function shown, the handle can no longer be included. In the shown in Fig. 7 The stretching function turns out to be fleeting Extension to the fixed jaw 2 protruding edge of the handle 33 even as advantageous, as this can serve additional contact surface on a workpiece.

Trotz der Beeinträchtigung des Zuganges des Griffes durch eine derartige Werkstückanlage ist eine Betätigung der Handhabe 10 und des Freigabehebels 15 aber dennoch problemlos möglich. Der Freigabehebel 15 liegt etwa diagonaler Gegenüberlage zur festen Spannbacke 2 am Gehäuse. Er wirkt derart auf den Sperrschieber 14, daß die Beaufschlagung des Sperrschiebers 14 mit dem Arm 18 des Freigabehebels 1 die Verkantstellung aufgehoben wird und der Sperrschieber 14 frei über die Zugoder Schubstange 3 gleiten kann. Hierzu greift der Arm 18 an der Angriffsseite 19 des Sperrschiebers 14 an, auf welcher Seite auch die Rückstellfeder 17 angreift. Durch Verlagerung des Sperrschiebers 14 in Richtung des Pfeiles wird die Rückstellfeder 17 gespannt. Wird der Freigabehebel 15 losgelassen, so zieht die Rückstellfeder an der Angriffsseite 19 den Sperrschieber 14 entgegen Pfeilrichtung. Diese einseitige Belastung des Freigabehebels 15 bewirkt eine Verkantung 25, 26 an den gegenüberliegenden Öffnungsseiten des Sperrschiebers 14. Einhergehend damit verklemmt sich der Sperrschieber 14 auf der Zug- oder Schubstange 3, so daß die Schubstange 3 entgegen Pfeilrichtung von der Rückstellfeder 17 mitgenommen wird, so daß die beiden Spannbacken 1, 2 auseinanderbewegt werden.Despite the impaired access to the handle such a workpiece system is an actuation the handle 10 and the release lever 15 but still possible without any problems. The release lever 15 is roughly diagonally opposite to the fixed jaw 2 on the housing. It acts in this way on the gate valve 14, that the application of the locking slide 14 with the Arm 18 of the release lever 1 canceled the tilt position is and the locking slide 14 freely over the train or Push rod 3 can slide. The arm reaches for this 18 on the attack side 19 of the locking slide 14, on which side the return spring 17 also acts. By moving the locking slide 14 in the direction of The return spring 17 is tensioned arrow. Will the Release lever 15 released, the return spring pulls on the attack side 19 against the locking slide 14 Arrow. This one-sided load on the release lever 15 causes a tilt 25, 26 to the opposite opening sides of the gate valve 14. Along with this, the locking slide jams 14 on the pull or push rod 3, so that the push rod 3 against the direction of the arrow from the return spring 17 is taken so that the two jaws 1, 2nd be moved apart.

Bei der in Fig. 7 dargestellten Dehnfunktionsstellung befindet sich die bewegliche Spannbacke 1 an gegenüberliegenden Enden 3'' der Schubstange 3. In the stretching function position shown in FIG. 7 is the movable jaw 1 on opposite Ends 3 '' of the push rod 3.

Das in Fig. 8 dargestellte Ausführungsbeispiel funktioniert in identischer Weise wie das in den Fig.1 bis 7 dargestellte Ausführunsbeispiel, lediglich die Gehäuseform ist anders ausgebildet und die Rückstellfeder 17 ist etwas verkürzt. Auch hier ist der um den Lagerstift 16 schwenkbare Freigabehebel 15 gabelförmig ausgebildet und bildet einen Fortsatz 21 aus, welcher einen Anschlag ausbildet, um die Gegenseite 20 des Sperrschiebers 14 gegen den ortsfesten Anschlag 24 zu drücken.The embodiment shown in Fig. 8 works in an identical manner to that in FIGS. 1 to 7 Exemplified embodiment shown, only the housing shape is designed differently and the return spring 17th is somewhat shortened. Here too is the bearing pin 16 pivotable release lever 15 fork-shaped and forms an extension 21 which has a stop trains to the opposite side 20 of the gate valve 14 to press against the fixed stop 24.

Auch bei dieser Version geht der Rücken des Griffes 33 in einen zurückspringenden Abschnitt über, aus welchem die Schubstange 3 ragt. Wie bei der in den Fig. 1--7 dargestellten Ausführungsform ist der der Schubstange 3 benachbarte zurückspringende Abschnitt geringer zum Freigabehebel 15 beabstandet als der Rücken des Griffes 33.In this version too, the back of handle 33 goes into a recessed section over from which the push rod 3 protrudes. As with that in Figs. 1--7 The embodiment shown is that of the push rod 3 adjacent recessed section lower to Release lever 15 spaced apart as the back of the handle 33rd

Das vorbeschriebene Getriebe kann nicht nur an einer Einhandspannzwinge Anwendung finden, sondern an jeder Art von Spannstock und insbesondere an einem Spanntisch. Bei der Anwendung an einem Spanntisch ist vorgesehen, daß die Spannbacken auf zwei parallel zueinanderliegenden Holmen quer dazu liegend, in Parallelrichtung zu den Holmen geführt sind und jeder Holm ein vorbeschriebenes Spanngetriebe aufweist. Die Betätigung kann dabei insbesondere über ein Fußpedal erfolgen.The gearbox described above can not only on one One-handed clamps apply, but to everyone Kind of vice and especially on a clamping table. When used on a clamping table, that the jaws on two parallel to each other Spars lying across, in parallel are led to the spars and each spar is a prescribed one Has tension gear. The actuation can take place in particular via a foot pedal.

Das in Fig. 9 dargestellte Ausführungsbeispiel zeichnet sich durch eine ansprechend gestaltete Gehäuseform aus. Auch hier liegen die Anlenkpunkte von Freigabehebel 15 und Handhabe 10 auf der gegenüberliegenden Seite der Spannbacken 1, 2 und auf derselben Seite, wie die aus dem Gehäuse herausragenden Hebel 10, 15. Auch hier ragen Griff 33, Handhabe 10 und Freigabehebel 15 seperat und frei vom Gehäuse ab. Während der Handgriff 33 in direkter Gegenüberlage zur festen Spannbacke liegt, liegt der Freigabehebel in diagonaler Gegenüberlage zur festen Spannbacke. Auch hier verlagert sich beim Spannen die Schubstange bzw. die bewegliche Backe 1 in entgegengesetzter Richtung zur Betätigungsrichtung der Handhabe 10. Auch diese variante erlaubt eine Montage der beweglichen Spannbacke 1 auf der gegenüberliegenden Seite 3'' der Schubstange 3. In dieser Stellung kann der den Griff ausbildende, vom Gehäuse abragende Arm 33 in Kombination mit der festen Backe 2 eine Stützfunktion ausüben.The embodiment shown in Fig. 9 draws is characterized by an attractively designed housing shape. The pivot points of release lever 15 are also located here and handle 10 on the opposite side of the Jaws 1, 2 and on the same side as the one from the lever 10, 15 protruding from the housing protrude handle 33, handle 10 and release lever 15 separate and free from the housing. During the handle 33 directly opposite the fixed jaw the release lever is diagonally opposite for a fixed jaw. Here, too, is shifting the push rod or the movable jaw when clamping 1 in the opposite direction to the direction of actuation the handle 10. This variant also allows assembly the movable jaw 1 on the opposite Side 3 '' of the push rod 3. In this position can form the handle that protrudes from the housing Arm 33 in combination with the fixed jaw 2 a support function exercise.

Claims (10)

  1. Clamping tool, in particular clamp,-- vice or clamping bench, having a first clamping jaw (1) and a second clamping jaw (2), it being possible for the first clamping jaw (1), which is fitted on a pull or push rod (3), to be displaced in a stepwise manner in one direction relative to the second clamping jaw (2) by means of an operating arm (36) of a first lever transmission (6, 10) acting on a carry-along slide which can be displaced counter to the return force of a spring (4), and having a releasable return displacement detent, characterized in that the lever transmission (6, 10) is configured so that the operating arm (36) of the lever transmission (6, 10) is shortened as the clamping force increases.
  2. Clamping tool according to Claim 1, characterized in that the lever transmission comprises a handle (10) and an actuating lever (6) defining the shortenable operating arm (36), the actuating lever (6) acting against an engagement surface (9) of the carry-along slide during a pivoting displacement of the handle.
  3. Clamping tool according to Claim 2, characterized in that the actuating lever (6) has an alterable bearing point (8, 11).
  4. Clamping tool according to one of Claims 2 or 3, characterized in that the actuating lever (6) has a bearing opening which is formed as a slot (11) and through which a housing-mounted bearing pin (8) passes.
  5. Clamping tool according to one of Claims 2 to 4, characterized in that the actuating lever (6) is of two-armed design, and the second arm (7), which is located opposite the operating arm (36), can be pivoted by a handle (10).
  6. Clamping tool according to one of Claims 2 to 5, characterized in that the operating arm (36) is spring-biassed in the direction of engagement and shortens when the spring-biassing is exceeded.
  7. Clamping tool according to one of Claims 2 to 6, characterized in that the actuating lever (6) is an angled lever, the displaceable bearing (8, 11) of which is located in the vertex of the angle.
  8. Clamping tool according to one of the preceding claims, characterized in that the clamping jaw (1) can be selectively mounted at one of the two ends (3', 3") of the pull or push rod.
  9. Clamping tool according to one of Claims 5 to 8, characterized in that the second arm (7) of the actuating lever (6) is loaded by a spring (12) in the direction of change of the bearing point.
  10. Clamping tool according to Claim 9, characterized in that the second arm (7) of the actuating lever (6) is slidingly positioned by the spring (12) in a cavity (13) of the handle (10), the handle being formed as a lever.
EP99125705A 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench Revoked EP0997233B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19731579A DE19731579A1 (en) 1997-07-23 1997-07-23 Clamping tool, especially clamp, vice or table
DE19731579 1997-07-23
EP98940087A EP0998373B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP98940087A Division EP0998373B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench

Publications (3)

Publication Number Publication Date
EP0997233A2 EP0997233A2 (en) 2000-05-03
EP0997233A3 EP0997233A3 (en) 2000-11-22
EP0997233B1 true EP0997233B1 (en) 2003-01-08

Family

ID=7836595

Family Applications (3)

Application Number Title Priority Date Filing Date
EP99125705A Revoked EP0997233B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench
EP98940087A Expired - Lifetime EP0998373B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench
EP99125704A Expired - Lifetime EP0997232B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP98940087A Expired - Lifetime EP0998373B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench
EP99125704A Expired - Lifetime EP0997232B1 (en) 1997-07-23 1998-06-26 Clamping tool, especially a clamping clip, clamping rod or clamping bench

Country Status (7)

Country Link
US (1) US6578837B1 (en)
EP (3) EP0997233B1 (en)
CN (3) CN100528490C (en)
AU (1) AU8853298A (en)
CA (2) CA2304718C (en)
DE (6) DE19731579A1 (en)
WO (1) WO1999004932A1 (en)

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Publication number Publication date
CA2586001C (en) 2009-11-17
DE19880089D2 (en) 1999-11-11
CN1136078C (en) 2004-01-28
CA2304718A1 (en) 1999-02-04
CN1265056A (en) 2000-08-30
EP0997232B1 (en) 2002-10-23
DE59806876D1 (en) 2003-02-13
CA2586001A1 (en) 1999-02-04
US6578837B1 (en) 2003-06-17
DE19861130A1 (en) 2000-04-06
WO1999004932A1 (en) 1999-02-04
EP0997232A3 (en) 2000-11-22
EP0997232A2 (en) 2000-05-03
CN1389328A (en) 2003-01-08
EP0998373B1 (en) 2000-12-27
AU8853298A (en) 1999-02-16
DE19731579A1 (en) 1999-01-28
CA2304718C (en) 2009-03-31
EP0998373A1 (en) 2000-05-10
EP0997233A3 (en) 2000-11-22
CN100450719C (en) 2009-01-14
CN1899768A (en) 2007-01-24
DE19880089B4 (en) 2007-04-19
DE59806061D1 (en) 2002-11-28
EP0997233A2 (en) 2000-05-03
CN100528490C (en) 2009-08-19
DE59800409D1 (en) 2001-02-01

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