EP0514704A1 - Clamp - Google Patents

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Publication number
EP0514704A1
EP0514704A1 EP92107467A EP92107467A EP0514704A1 EP 0514704 A1 EP0514704 A1 EP 0514704A1 EP 92107467 A EP92107467 A EP 92107467A EP 92107467 A EP92107467 A EP 92107467A EP 0514704 A1 EP0514704 A1 EP 0514704A1
Authority
EP
European Patent Office
Prior art keywords
rail
loose part
wedge
screw clamp
loose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92107467A
Other languages
German (de)
French (fr)
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EP0514704B1 (en
Inventor
Udo Faubel
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.)
Herba-Werkzeugfabrik Max Herbstrith & Co KG GmbH
Original Assignee
Herba-Werkzeugfabrik Max Herbstrith & Co KG GmbH
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Application filed by Herba-Werkzeugfabrik Max Herbstrith & Co KG GmbH filed Critical Herba-Werkzeugfabrik Max Herbstrith & Co KG GmbH
Publication of EP0514704A1 publication Critical patent/EP0514704A1/en
Application granted granted Critical
Publication of EP0514704B1 publication Critical patent/EP0514704B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/10Arrangements for positively actuating jaws using screws
    • B25B5/102Arrangements for positively actuating jaws using screws with at least one jaw sliding along a bar
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/068Arrangements for positively actuating jaws with at least one jaw sliding along a bar

Definitions

  • the present invention relates to a screw clamp with a rail, at one end of which a fixed jaw (fixed part) is seated, and along which a movable clamping jaw (loose part) with a clamping device is displaceably guided such that there is a slight play between the rail and the loose part Tilting movement of the loose part on the rail allows, with a positive locking of the longitudinal movement of the loose part on the rail is given between the rail and the loose part.
  • the invention is not limited to screw clamps in which the clamping device consists of a threaded spindle guided in a thread at the end of the loose part, but can also be used with other screw clamps;
  • the clamping device is designed as a clamping eccentric, in which the clamping action is brought about by the constantly increasing eccentric radius as a result of the eccentric rotary movement.
  • the positive connection between the rail and the loose part to inhibit the longitudinal movement of the loose part on the rail is achieved by one in the loose part screwed threaded pin and on the other hand formed by a transverse toothing running along the rail.
  • the threaded pin is seated in a threaded hole made in the longitudinal direction of the rail, it being only partially surrounded by the threaded hole.
  • the threaded hole is cut on its side facing the rail so that the threaded pin is exposed there with a partial circumference of its threaded teeth. With this exposed area, it can come into positive engagement with the associated toothing on the rail with a corresponding tilting movement of the loose part and thus prevent slipping.
  • the thread needs a safety device in order to avoid loosening of the threaded pin despite the lateral forces constantly acting on the threaded pin.
  • the present invention has for its object to improve a screw clamp of the type mentioned so that it excludes slipping or unwanted loosening of the loose part while reducing the manufacturing costs and manufacturing costs.
  • this is achieved in that the positive connection of one located between the loose part and the rail Wedge with a form-fitting surface of the rail facing form-fitting surface is formed, and the wedge is arranged with play between the rail and the loose part.
  • the wedge as a separate component lies loosely between the rail and the loose part, in such a way that, when the loose part tilts, its form-fitting surface engages with the form-fitting surface of the rail, the movement necessary for this being forced over the pressing part by the loose part becomes.
  • the relatively low mobility of the wedge is of particular importance here. As a result of its low mobility, it can always align itself under the constraint that is exerted on it by tilting the loose part in such a way that it is also in engagement with the rail over a greater length range. This measure makes it possible to achieve the additional advantage, in a surprisingly simple manner, that the overall load-bearing area of the positive-locking surface in engagement is enlarged. This enlargement of the supporting area reduces the pressure between the two surfaces in engagement, which reduces wear due to wear.
  • the screw clamp 1 according to the invention shown in FIG. 1 consists of a rail 2, at one end of which a fixed jaw (fixed part) 3 is attached at right angles.
  • the fixed jaw 3 is immovably connected to the rail 2.
  • the screw clamp 1 has a movable clamping jaw (loose part) 4, which is displaceably guided along the rail 2 in both directions shown by direction arrow 5.
  • the loose part 4 has a slot-shaped opening 6 in the plane of the drawing, the overall width B of which is a small clearance S greater than the width b of the rail 2 plus the thickness D of a wedge 7 located between the rail 2 and the loose part 4.
  • the clamping device 9 consists of a threaded spindle 11, which is rotatably seated in a threaded bore 12 at the free end 13 of the loose part 4.
  • a booklet 14 is non-rotatably connected to the threaded spindle 11 and is used to tighten the threaded spindle 11 by hand.
  • the threaded spindle 11 preferably mounted in a somewhat movable manner, carries the pressure plate 15, which is on the counter pressure surface 16 Free end 17 of the fixed part 3 is opposite the distance A.
  • the distance A corresponds to the thickness of the workpiece 10, so that the pressure plate and the counter pressure surface rest on opposite workpiece surfaces.
  • the detail according to the invention designated II in FIG. 1 is now further explained in FIGS. 2 and 3.
  • the movable jaw 4 is cut in the longitudinal plane, so that the rail 2 is fully visible in the plan view.
  • the loose part 4 has a slot-like opening 6 through which the rail 2 runs.
  • the opening 6 has the width dimension B, which is slightly larger than the sum of the rail width b and the thickness D of the wedge 7. This results, as already described, a game S between the loose part 4 and the rail 2, so that the loose part 4 can tilt by the angle alpha (8) on the rail 2.
  • the wedge 7 located between the loose part 4 and the rail 2 on the rail side facing the tensioning device 3 is now decisive.
  • This wedge 7 has a form-fitting surface 19 facing the rail 2, and the rail 2 in turn has an associated form-fitting surface 20 over its entire length, with which the form-fitting surface 19 of the wedge 7 can engage in any possible displacement position.
  • the mutually facing interlocking surfaces 19, 20 can be produced in particular by a simple pressing process as a corrugated surface or toothing surface. It has been shown that tooth or corrugation depths of the order of magnitude of approximately 0.1 to 0.4 mm are particularly favorable with a distance of the respectively adjacent teeth or corrugation depressions measured in the longitudinal direction of the rail 2 of approximately 1 mm, with a reliable Function of the clamp 1 according to the invention is guaranteed.
  • the wedge 7 has a U-shaped cross section and encompasses the opening in the loose part 4 on both sides with its opposite parallel projections 22 at a short distance.
  • the wedge 7 is so movable that it can perform a slight tilting movement about a vertical axis running perpendicular to the paper plane.
  • Screw clamps of this type are required, for example, in order to press a workpiece 10, consisting of two boards, during the sizing.
  • the loose part 4 is first shifted in the direction 5 to the fixed part 3 along the rail 2 until the pressure plate 15 and the counter pressure surface 16 clamp the workpiece 10 between them.
  • the form-fitting surfaces 19 and 20 of the wedge 7 and the rail 2 within the game S have such great freedom of movement that they are not in mutual engagement. Should the form-fitting surfaces occasionally touch each other, they will slide while touching them sloping tooth flanks so that the wedge dodges within its range of motion and does not prevent the longitudinal movement of the loose part.
  • the aim is to compress the workpiece by tightening the threaded spindle 11 via the booklet 14.
  • the loose part would move away from the workpiece 10 in the opposite direction to the same extent as is intended to press the pressure plate 15 onto the workpiece.
  • the loose part 4 must be fixed on the rail 2 in an anti-slip manner before pressing.
  • the anti-slip fixation is created in the screw clamp according to the invention by the interaction of the game S between the loose part and rail and the form-fitting surfaces between the wedge and rail.
  • a slight pressure F (FIG. 3) on the end of the loose part 4 located on the rail 2 moves it a little further in the direction of the fixed part 3. It deviates from its right-angled position to the rail and tilts by the angle alpha (8).
  • the tilting movement is shown with directional arrow 18 (Fig. 3).
  • part of the pressure surface 21 of the loose part 4 presses on the wedge, which in turn tries to evade under this constraint. It can only deflect in the direction of the rail 2, and in the process comes into engagement with the form-fitting surface 19 with the associated form-fitting surface 20 of the rail 2. At this moment, two different tilting moments act on it.
  • the loose part 4 has tilted on the rail 2 and clamps it diagonally between the clamping point 25 and the area 24.
  • the pressure developed in this way is distributed over a large number of teeth in the area 24 and on the area of the clamping point 25.
  • the surface pressure in the area of the teeth is so low that plastic deformation of the teeth is excluded.
  • the assembly of the screw clamp according to the invention is very simple.
  • the wedge 7 is inserted into the opening 6 of the loose part 4 inserted and pushed against the pressure surface 21. Then the rail 2 is inserted through the remaining opening 6 of the loose part 4, and after assembly, the lock 27 (Fig.1) attached to the end of the rail.
  • Screw clamps of this type are tools which are produced in large numbers.
  • the manufacture of the wedge as a pressed part is advantageous here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Surgical Instruments (AREA)
  • Pinball Game Machines (AREA)

Abstract

Screw clamp with a rail, on the one end of which a fixed jaw (fixed part) is fitted, and along which a movable clamping jaw (loose part) is guided displaceably with a clamping device in such a way that between the rail and the loose part there is an amount of play, which permits a slight tilting movement of the loose part on the rail, and in which arrangement there is between the rail and the loose part a form closure retarding the longitudinal movement of the loose part on the rail, the form closure being formed by a wedge (7), which is located between the loose part (4) and the rail (2) and has a form-closing face (19) facing a form-closing face (20) of the rail (2), and the wedge (7) being arranged with play between the rail (2) and the loose part (4). <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Schraubzwinge mit einer Schiene, an deren einem Ende eine feste Backe (Festteil) sitzt, und entlang der eine bewegliche Spannbacke (Losteil) mit Spanneinrichtung derart verschiebbar geführt ist, daß zwischen Schiene und Losteil ein Spiel besteht, welches eine geringe Kippbewegung des Losteils auf der Schiene ermöglicht, wobei zwischen Schiene und Losteil ein die Längsbewegung des Losteils auf der Schiene hemmmender, Formschluß gegeben ist.The present invention relates to a screw clamp with a rail, at one end of which a fixed jaw (fixed part) is seated, and along which a movable clamping jaw (loose part) with a clamping device is displaceably guided such that there is a slight play between the rail and the loose part Tilting movement of the loose part on the rail allows, with a positive locking of the longitudinal movement of the loose part on the rail is given between the rail and the loose part.

Die Erfindung ist nicht auf Schraubzwingen beschränkt, bei welchen die Spanneinrichtung aus einer am Ende des Losteils in einem Gewinde geführten Gewindespindel besteht, sondern kann auch Anwendung finden bei anderen Schraubzwingen; beispielsweise an Schraubzwingen, bei welchen die Spanneinrichtung als klemmender Exzenter ausgebildet ist, bei welchem die Spannwirkung durch den infolge der Exzenterdrehbewegung ständig zunehmenden Exzenterradius zustande kommt.The invention is not limited to screw clamps in which the clamping device consists of a threaded spindle guided in a thread at the end of the loose part, but can also be used with other screw clamps; For example, on screw clamps, in which the clamping device is designed as a clamping eccentric, in which the clamping action is brought about by the constantly increasing eccentric radius as a result of the eccentric rotary movement.

Bei den bekannten Schraubzwingen wird der Formschluß zwischen Schiene und Losteil zur Hemmung der Längsbewegung des Losteils an der Schiene einerseits durch einen in das Losteil eingeschraubten Gewindestift und andererseits durch eine entlang der Schiene verlaufende Querverzahnung gebildet. Hierbei sitzt der Gewindestift in einer in Längsrichtung der Schiene eingebrachten Gewindebohrung, wobei er nur teilweise von der Gewindebohrung umgeben ist. Die Gewindebohrung ist nämlich auf ihrer der Schiene zugewandten Seite so angeschnitten, daß der Gewindestift dort mit einem Teilumfang seiner Gewindezähne freiliegt. Mit diesem freiliegenden Bereich kann er bei entsprechender Kippbewegung des Losteils mit der zugeordneten Verzahnung an der Schiene in formschlüssigen Eingriff gelangen und so ein Verrutschen verhindern.In the known screw clamps, the positive connection between the rail and the loose part to inhibit the longitudinal movement of the loose part on the rail is achieved by one in the loose part screwed threaded pin and on the other hand formed by a transverse toothing running along the rail. The threaded pin is seated in a threaded hole made in the longitudinal direction of the rail, it being only partially surrounded by the threaded hole. The threaded hole is cut on its side facing the rail so that the threaded pin is exposed there with a partial circumference of its threaded teeth. With this exposed area, it can come into positive engagement with the associated toothing on the rail with a corresponding tilting movement of the loose part and thus prevent slipping.

Nachteilig bei diesen Schraubzwingen ist der relativ hohe Herstellungsaufwand mit einer Vielzahl von Arbeitsgängen. Zunächst einmal muß zur Gewindeherstellung ein Loch vorgebohrt werden, in welches anschließend das Gewinde eingeschnitten wird. Danach muß die Bohrung durch Fräsen angeschnitten werden, um dann den Gewindestift in das angeschnittene Gewinde behutsam einzuschrauben.The disadvantage of these screw clamps is the relatively high production cost with a large number of operations. First of all, a hole must be pre-drilled for thread production, into which the thread is then cut. Then the hole must be cut by milling in order to then carefully screw the threaded pin into the cut thread.

Zusätzlich bedarf das Gewinde einer Sicherung, um trotz der ständig auf den Gewindestift wirkenden Seitenkräfte ein Lösen des Gewindestiftes zu vermeiden.In addition, the thread needs a safety device in order to avoid loosening of the threaded pin despite the lateral forces constantly acting on the threaded pin.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Schraubzwinge der eingangs genannten Art so zu verbessern, daß sie unter Verringerung der Herstellungskosten und des Herstellungsaufwandes ein Abrutschen oder ungewolltes Lösen des Losteils ausschließt.The present invention has for its object to improve a screw clamp of the type mentioned so that it excludes slipping or unwanted loosening of the loose part while reducing the manufacturing costs and manufacturing costs.

Erfindungsgemäß wird dies dadurch erreicht, daß der Formschluß von einem zwischen Losteil und Schiene befindlichen Keil mit einer einer Formschlußfläche der Schiene zugewandten Formschlußfläche gebildet wird, und der Keil mit Spiel zwischen Schiene und Losteil angeordnet ist.According to the invention this is achieved in that the positive connection of one located between the loose part and the rail Wedge with a form-fitting surface of the rail facing form-fitting surface is formed, and the wedge is arranged with play between the rail and the loose part.

Erfindungsgemäß liegt der Keil als separates Bauteil lose zwischen der Schiene und dem Losteil, und zwar so, daß er bei Kippbewegung des Losteils mit seiner Formschlußfläche in Eingriff mit der Formschlußfläche der Schiene gerät, wobei ihm die hierzu notwendige Bewegung über seine Andruckfläche von dem Losteil aufgezwungen wird. Hierbei ist die relativ geringe Beweglichkeit des Keils von besonderer Bedeutung. Infolge seiner geringen Beweglichkeit kann er sich unter dem Zwang, der durch Kippen des Losteils auf ihn ausgeübt wird, stets so ausrichten, daß er zugleich mit einem größeren Längenbereich mit der Schiene im Eingriff ist. Durch diese Maßnahme läßt sich auf überraschend einfache Weise der zusätzliche Vorteil erreichen, daß die tragende Gesamtfläche der im Eingriff befindlichen Formschlußfläche vergrößert ist. Durch diese Vergrößerung des Tragbereichs wird die Pressung zwischen den beiden im Eingriff befindlichen Flächen herabgesetzt, wodurch der Verschleiß durch Abnutzung reduziert ist.According to the invention, the wedge as a separate component lies loosely between the rail and the loose part, in such a way that, when the loose part tilts, its form-fitting surface engages with the form-fitting surface of the rail, the movement necessary for this being forced over the pressing part by the loose part becomes. The relatively low mobility of the wedge is of particular importance here. As a result of its low mobility, it can always align itself under the constraint that is exerted on it by tilting the loose part in such a way that it is also in engagement with the rail over a greater length range. This measure makes it possible to achieve the additional advantage, in a surprisingly simple manner, that the overall load-bearing area of the positive-locking surface in engagement is enlarged. This enlargement of the supporting area reduces the pressure between the two surfaces in engagement, which reduces wear due to wear.

Weitere vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen enthalten.Further advantageous embodiments of the invention are contained in the subclaims.

Anhand des in den beiliegenden Zeichnungen dargestellten Ausführungsbeispiels wird die Erfindung nunmehr näher erläutert.The invention will now be explained in more detail with reference to the embodiment shown in the accompanying drawings.

Es zeigen:

Fig. 1
eine Ansicht der erfindungsgemäßen Schraubzwinge in dem mit II bezeichneten Bereich , der in den
Fig. 2 und 3
als vergrößerte Einzelheit sowohl in Verschiebestellung (Fig.2) als auch in Verzahnungseingriff (Fig.3) dargestellt ist.
Show it:
Fig. 1
a view of the clamp according to the invention in the designated II Area in the
2 and 3
is shown as an enlarged detail both in the shift position (FIG. 2) and in toothing engagement (FIG. 3).

Die in Fig. 1 dargestellte erfindungsgemäße Schraubzwinge 1 besteht aus einer Schiene 2, an deren einem Ende rechtwinklig eine feste Backe (Festteil) 3 befestigt ist. Die feste Backe 3 ist unverrückbar fest mit der Schiene 2 verbunden. Weiterhin weist die Schraubzwinge 1 eine bewegliche Spannbacke (Losteil) 4 auf, welche entlang der Schiene 2 in beiden durch Richtungspfeil 5 gezeigten Richtungen verschiebbar geführt ist. Zur Führung weist das Losteil 4 einen in der Zeichnungsebene liegenden schlitzförmigen Durchbruch 6 auf, dessen Gesamtbreite B um ein geringes Spiel S größer ist, als die Breite b der Schiene 2 zuzüglich der Dicke D eines zwischen Schiene 2 und Losteil 4 befindlichen Keils 7.The screw clamp 1 according to the invention shown in FIG. 1 consists of a rail 2, at one end of which a fixed jaw (fixed part) 3 is attached at right angles. The fixed jaw 3 is immovably connected to the rail 2. Furthermore, the screw clamp 1 has a movable clamping jaw (loose part) 4, which is displaceably guided along the rail 2 in both directions shown by direction arrow 5. For guidance purposes, the loose part 4 has a slot-shaped opening 6 in the plane of the drawing, the overall width B of which is a small clearance S greater than the width b of the rail 2 plus the thickness D of a wedge 7 located between the rail 2 and the loose part 4.

Infolge dieses geringen Spiels S ist sichergestellt, daß das Losteil 4 relativ zur Schiene eine Kippbewegung mit dem relativ kleinen Kippwinkel alpha (8) ausführen kann.As a result of this slight play S, it is ensured that the loose part 4 can perform a tilting movement with the relatively small tilting angle alpha (8) relative to the rail.

Diese Kippbewegung ist an sich bekannt und soll ein Abrutschen des Losteils 4 auf der Schiene 2 beim Benutzen der Schraubzwinge zum Fressen eines Werkstücks 10 verhindern. Die Spanneinrichtung 9 besteht in diesem Fall aus einer Gewindespindel 11, welche drehbar in einer Gewindebohrung 12 am freien Ende 13 des Losteils 4 sitzt. An ihrem vom Festteil 3 abgewandten Ende ist ein Heft 14 drehfest mit der Gewindespindel 11 verbunden und dient zum Anziehen der Gewindespindel 11 mit der Hand. An ihrem anderen Ende trägt die Gewindespindel 11, vorzugsweise etwas beweglich gelagert, die Druckplatte 15, welche der Gegendruckfläche 16 am freien Ende 17 des Festteils 3 mit dem Abstand A gegenüberliegt. Der Abstand A entspricht der Dicke des Werkstücks 10, so daß Druckplatte und Gegendruckfläche an gegenüberliegenden Werkstückflächen anliegen.This tilting movement is known per se and is intended to prevent the loose part 4 from slipping on the rail 2 when the screw clamp is used to eat a workpiece 10. In this case, the clamping device 9 consists of a threaded spindle 11, which is rotatably seated in a threaded bore 12 at the free end 13 of the loose part 4. At its end facing away from the fixed part 3, a booklet 14 is non-rotatably connected to the threaded spindle 11 and is used to tighten the threaded spindle 11 by hand. At its other end, the threaded spindle 11, preferably mounted in a somewhat movable manner, carries the pressure plate 15, which is on the counter pressure surface 16 Free end 17 of the fixed part 3 is opposite the distance A. The distance A corresponds to the thickness of the workpiece 10, so that the pressure plate and the counter pressure surface rest on opposite workpiece surfaces.

Die in Fig. 1 mit II bezeichnete erfindungsgemäße Einzelheit wird nun in den Fig. 2 und 3 noch weiter erläutert. Die bewegliche Spannbacke 4 ist in der Längsebene geschnitten, so daß die Schiene 2 in der Draufsicht voll sichtbar ist. Das Losteil 4 weist einen schlitzartigen Durchbruch 6 auf, durch den die Schiene 2 verläuft. Der Durchbruch 6 hat die Breitenabmessung B, die etwas größer ist, als die Summe aus der Schienenbreite b und der Dicke D des Keils 7. Hierdurch ergibt sich, wie bereits geschildert, ein Spiel S zwischen dem Losteil 4 und der Schiene 2, so daß das Losteil 4 um den Winkel alpha (8) auf der Schiene 2 kippen kann. Entscheidend ist nun der zwischen Losteil 4 und Schiene 2 befindliche Keil 7 auf der der Spanneinrichtung 3 zugekehrten Schienenseite. Dieser Keil 7 besitzt eine der Schiene 2 zugewandte Formschlußfläche 19, und die Schiene 2 ihrerseits weist über ihre gesamte Länge eine zugeordnete Formschlußsfläche 20 auf, mit welcher die Formschlußfläche 19 des Keils 7 in jeder möglichen Verschiebestellung in Eingriff gelangen kann. Die sich einander zugewandten Formschlußflächen 19, 20 können insbesondere durch einen einfachen Pressvorgang als Riffelfläche oder Verzahnungsfläche hergestellt sein. Es hat sich gezeigt, daß Zahn- oder Riffelungstiefen in der Größenordnung von etwa 0,1 bis 0,4 mm bei einem in Längsrichtung der Schiene 2 gemessenen Abstand der jeweils benachbarten Zähne bzw. Riffelvertiefungen von etwa 1 mm besonders günstig sind, wobei eine sichere Funktion der erfindungsgemäßen Schraubzwinge 1 gewährleistet ist. gelagert, und zwar so, daß er in der Zeichnung sowohl nach rechts und links, als auch nach oben und unten einen geringen Bewegungsspielraum hat. Der Bewegungsspielraum nach oben und unten ist begrenzt durch die Vorsprünge 22, die an den Enden des Keils 7 sitzen und von oben und unten mit einem geringen Spiel über das Losteil 4 ragen. Die Vorsprünge 22 wirken als Anschläge und werden wirksam, sobald sie sich gegen das Losteil 4 abstützen. Der Bewegungsspielraum nach rechts und links entspricht dem bereits erläutertem Spiel S. Als eine Besonderheit ist zu sehen, daß der Keil 7 einen U-förmigen Querschnitt aufweist und den Durchbruch im Losteil 4 beidseitig mit seinen gegenüberliegenden parallelen Vorsprüngen 22 mit geringem Abstand umgreift. Im Ergebnis ist der Keil 7 also so beweglich, daß er eine geringe Kippbewegung um eine senkrecht zur Papierebene verlaufenden Hochachse ausführen kann. Auf seiner von der Formschlußfläche 19 abgewandten Seite liegt er mit einer Andruckfläche 21 einer Begrenzungswand des Durchbruchs 6; in diesem Fall der linken, unmittelbar gegenüber.The detail according to the invention designated II in FIG. 1 is now further explained in FIGS. 2 and 3. The movable jaw 4 is cut in the longitudinal plane, so that the rail 2 is fully visible in the plan view. The loose part 4 has a slot-like opening 6 through which the rail 2 runs. The opening 6 has the width dimension B, which is slightly larger than the sum of the rail width b and the thickness D of the wedge 7. This results, as already described, a game S between the loose part 4 and the rail 2, so that the loose part 4 can tilt by the angle alpha (8) on the rail 2. The wedge 7 located between the loose part 4 and the rail 2 on the rail side facing the tensioning device 3 is now decisive. This wedge 7 has a form-fitting surface 19 facing the rail 2, and the rail 2 in turn has an associated form-fitting surface 20 over its entire length, with which the form-fitting surface 19 of the wedge 7 can engage in any possible displacement position. The mutually facing interlocking surfaces 19, 20 can be produced in particular by a simple pressing process as a corrugated surface or toothing surface. It has been shown that tooth or corrugation depths of the order of magnitude of approximately 0.1 to 0.4 mm are particularly favorable with a distance of the respectively adjacent teeth or corrugation depressions measured in the longitudinal direction of the rail 2 of approximately 1 mm, with a reliable Function of the clamp 1 according to the invention is guaranteed. stored, in such a way that in the drawing he has little room for movement both to the right and left, and up and down. The freedom of movement up and down is limited by the projections 22, which sit at the ends of the wedge 7 and protrude from the top and the bottom with a slight play over the loose part 4. The projections 22 act as stops and take effect as soon as they are supported against the loose part 4. The freedom of movement to the right and left corresponds to the game S already explained. As a special feature it can be seen that the wedge 7 has a U-shaped cross section and encompasses the opening in the loose part 4 on both sides with its opposite parallel projections 22 at a short distance. As a result, the wedge 7 is so movable that it can perform a slight tilting movement about a vertical axis running perpendicular to the paper plane. On its side facing away from the form-fitting surface 19 it lies with a pressure surface 21 of a boundary wall of the opening 6; in this case the one on the left, directly opposite.

Zur Funktion:About the function:

Derartige Schraubzwingen werden beispielweise benötigt, um ein Werkstück 10, bestehend aus zwei Brettern, bei der Leimung zu verpressen. Bei diesem Vorgang wird zunächst das Losteil 4 soweit in Richtung 5 zum Festteil 3 entlang der Schiene 2 verschoben, bis die Druckplatte 15 und die Gegendruckfläche 16 das Werkstück 10 zwischen sich einklemmen. Beim Verschieben liegt das Losteil 4 im wesentlichen rechtwinklig zur Schiene 2, so daß die Formschlußflächen 19 und 20 des Keils 7 und der Schiene 2 innerhalb des Spiels S eine so große Bewegungsfreiheit haben, daß sie nicht im gegenseitigen Eingriff sind. Sollten sich die Formschlußflächen gelegentlich berühren, so gleiten sie unter Berührung ihrer schrägen Zahnflanken so aufeinander ab, daß der Keil innerhalb seines Bewegungsspielraums ausweicht, und die Längsbewegung des Losteils nicht hindert.Screw clamps of this type are required, for example, in order to press a workpiece 10, consisting of two boards, during the sizing. In this process, the loose part 4 is first shifted in the direction 5 to the fixed part 3 along the rail 2 until the pressure plate 15 and the counter pressure surface 16 clamp the workpiece 10 between them. When moving the loose part 4 is substantially perpendicular to the rail 2, so that the form-fitting surfaces 19 and 20 of the wedge 7 and the rail 2 within the game S have such great freedom of movement that they are not in mutual engagement. Should the form-fitting surfaces occasionally touch each other, they will slide while touching them sloping tooth flanks so that the wedge dodges within its range of motion and does not prevent the longitudinal movement of the loose part.

Sobald Druckplatte und Gegendruckfläche das Werkstück 10 zwischen sich einklemmen, strebt man das Verpressen des Werkstücks mittels Anziehen der Gewindespindel 11 über das Heft 14 an. Dabei würde sich aber das Losteil in der entgegengesetzen Richtung in gleichem Maße vom Werkstück 10 entfernen, wie man beabsichtigt, die Druckplatte 15 auf das Werkstück zu drücken.As soon as the pressure plate and the counter pressure surface clamp the workpiece 10 between them, the aim is to compress the workpiece by tightening the threaded spindle 11 via the booklet 14. However, the loose part would move away from the workpiece 10 in the opposite direction to the same extent as is intended to press the pressure plate 15 onto the workpiece.

Aus diesem Grund muß vor dem Verpressen das Losteil 4 auf der Schiene 2 rutschhemmend fixiert sein. Die rutschhemmende Fixierung entsteht bei der erfindungsgemäßen Schraubzwinge durch das Zusammenwirken des Spiels S zwischen Losteil und Schiene und den Formschlußflächen zwischen Keil und Schiene. Durch einen leichten Druck F (Fig. 3) auf das an der Schiene 2 befindliche Ende des Losteils 4 wird dieses noch ein Stückchen weiter in Richtung zum Festteil 3 bewegt. Dabei weicht es aus seiner rechtwinkligen Stellung zur Schiene aus und kippt um den Winkel alpha (8). Die Kippbewegung ist mit Richtungspfeil 18 (Fig. 3) dargestellt. Bei dieser Kippbewegung drückt ein Teil der Andruckfläche 21 des Losteils 4 auf den Keil, der unter diesem Zwang seinerseits versucht auszuweichen. Er kann nur in Richtung zur Schiene 2 ausweichen, und gerät dabei mit seiner Formschlußfläche 19 in Eingriff mit der zugeordneten Formschlußfläche 20 der Schiene 2. In diesem Augenblick wirken zwei verschiedene Kippmomente auf ihn ein.For this reason, the loose part 4 must be fixed on the rail 2 in an anti-slip manner before pressing. The anti-slip fixation is created in the screw clamp according to the invention by the interaction of the game S between the loose part and rail and the form-fitting surfaces between the wedge and rail. A slight pressure F (FIG. 3) on the end of the loose part 4 located on the rail 2 moves it a little further in the direction of the fixed part 3. It deviates from its right-angled position to the rail and tilts by the angle alpha (8). The tilting movement is shown with directional arrow 18 (Fig. 3). During this tilting movement, part of the pressure surface 21 of the loose part 4 presses on the wedge, which in turn tries to evade under this constraint. It can only deflect in the direction of the rail 2, and in the process comes into engagement with the form-fitting surface 19 with the associated form-fitting surface 20 of the rail 2. At this moment, two different tilting moments act on it.

Die von der Schiene auf ihn ausgeübte Gegenkraft versucht ihn in Richtung des Uhrzeigersinns weiterzudrehen, und die von der Andruckfläche 21 ausgeübte Kraft ebenfalls. Hierdurch vollzieht er innerhalb seines geringen Bewegungsspielraums eine Kippbewegung 23 und gelangt deshalb mit weiteren Zähnen seiner als z. B. Verzahnungsfläche ausgebildeten Formschlußfläche 19 in Eingriff mit der Formschlußfläche 20 Schiene 2, solange, bis er in einem Bereich 24 mit einer Vielzahl von Zähnen der Schiene im Eingriff ist.The counterforce exerted by the rail tries to turn it clockwise, and that force exerted by the pressure surface 21 also. As a result, he performs a tilting movement 23 within his small range of motion and therefore arrives with more teeth than z. B. toothed surface formed form-fitting surface 19 in engagement with the form-fitting surface 20 rail 2 until it is in a region 24 with a plurality of teeth of the rail in engagement.

Bei diesem Vorgang hat sich das Losteil 4 auf der Schiene 2 verkantet und klemmt diese diagonal zwischen der Klemmstelle 25 und dem Bereich 24 ein. Der dabei entwickelte Druck verteilt sich auf eine Vielzahl von Zähnen im Bereich 24 und auf dem Bereich der Klemmstelle 25. Hierdurch wird die Flächenpressung im Bereich der Zähne so gering, daß eine plastische Verformung der Zähne ausgeschlossen ist.During this process, the loose part 4 has tilted on the rail 2 and clamps it diagonally between the clamping point 25 and the area 24. The pressure developed in this way is distributed over a large number of teeth in the area 24 and on the area of the clamping point 25. As a result, the surface pressure in the area of the teeth is so low that plastic deformation of the teeth is excluded.

Infolge der beiden im Eingriff befindlichen Verzahnungsflächen 19 und 20 ist das Losteil 4 in axialer Schienenrichtung fixiert, und das Verpressen des Werkstücks 10 durch Anziehen der Spindel 11 kann beginnen.As a result of the two toothing surfaces 19 and 20 in engagement, the loose part 4 is fixed in the axial rail direction, and the pressing of the workpiece 10 by tightening the spindle 11 can begin.

Zum Lösen der Klemmverbindung genügt ein leichter Schlag aus der entgegengesetzten Richtung gegen das Losteil 4, z.B. gegen die Schlagfläche 26, und der rutschhemmende Eingriff gerät auseinander.To loosen the clamp connection, a light blow from the opposite direction against the loose part 4, e.g. against the face 26, and the non-slip engagement comes apart.

Zur Montage:For assembly:

Die Montage der erfindungsgemäßen Schraubzwinge ist denkbar einfach.The assembly of the screw clamp according to the invention is very simple.

Nachdem Schiene 2 und Festteil 3 fest miteinander verbunden sind, wird der Keil 7 in den Durchbruch 6 des Losteils 4 eingelegt und gegen die Andruckfläche 21 geschoben. Danach wird die Schiene 2 durch den verbleibenden Durchbruch 6 des Losteils 4 gesteckt, und nach erfolgter Montage die Sperre 27 (Fig.1) am Ende der Schiene angebracht.After the rail 2 and the fixed part 3 are firmly connected to one another, the wedge 7 is inserted into the opening 6 of the loose part 4 inserted and pushed against the pressure surface 21. Then the rail 2 is inserted through the remaining opening 6 of the loose part 4, and after assembly, the lock 27 (Fig.1) attached to the end of the rail.

Bei derartigen Schraubzwingen handelt es sich um Werkzeuge, die in großen Stückzahlen produziert werden. Die Fertigung des Keils als Preßteil ist hierbei vorteilhaft.Screw clamps of this type are tools which are produced in large numbers. The manufacture of the wedge as a pressed part is advantageous here.

Claims (7)

Schraubzwinge mit einer Schiene, an deren einem Ende eine feste Backe (Festteil) sitzt, und entlang der eine bewegliche Spannbacke (Losteil) mit Spanneinrichtung derart verschiebbar geführt ist, daß zwischen Schiene und Losteil ein Spiel besteht, welches eine geringe Kippbewegung des Losteils auf der Schiene ermöglicht, und wobei zwischen Schiene und Losteil eine die Längsbewegung des Losteils auf der Schiene hemmmender Formschluß gegeben ist,
dadurch gekennzeichnet,
daß der Formschluß von einem zwischen Losteil (4) und Schiene (2) befindlichen Keil (7) mit einer einer Formschlußfläche (20) der Schiene (2) zugewandten Formschlußfläche (19) gebildet wird, und der Keil (7) mit Spiel zwischen der Schiene (2) und dem Losteil (4) angeordnet ist.
Screw clamp with a rail, at one end of which a fixed jaw (fixed part) is seated, and along which a movable clamping jaw (loose part) with a clamping device is displaceably guided so that there is a play between the rail and the loose part, which causes a slight tilting movement of the loose part on the Enables rail, and between the rail and the loose part there is a positive locking which inhibits the longitudinal movement of the loose part on the rail,
characterized by
that the positive connection between a loose part (4) and rail (2) located wedge (7) with a form-fitting surface (20) of the rail (2) facing form-fitting surface (19) is formed, and the wedge (7) with play between the Rail (2) and the loose part (4) is arranged.
Schraubzwinge nach Anspruch 1,
dadurch gekennzeichnet,
daß das Losteil (4) einen Durchbruch (6) für die Schiene (2) aufweist, und daß innerhalb des Durchbruchs (6) der Keil (7) derart sitzt, daß er sowohl in Längsals auch Querrichtung des Durchbruchs (6) mit Spiel geführt ist.
Screw clamp according to claim 1,
characterized by
that the loose part (4) has an opening (6) for the rail (2), and that within the opening (6) the wedge (7) sits such that it is guided with play both in the longitudinal and transverse directions of the opening (6) is.
Schraubzwinge nach Anspruch 2,
dadurch gekennzeichnet,
daß der Keil (7) im Durchbruch (6) an der der Spanneinrichtung (3) zugewandten Seite der Schiene (2) angeordnet ist.
Screw clamp according to claim 2,
characterized by
that the wedge (7) is arranged in the opening (6) on the side of the rail (2) facing the tensioning device (3).
Schraubzwinge nach Anspruch 2 oder 3,
dadurch gekennzeichnet,
daß der Keil (7) Anschläge (22) beidendig besitzt, welche als Vorsprünge des Keils (7) ausgebildet sind und die das Losteil (4) umfassen.
Screw clamp according to claim 2 or 3,
characterized,
that the wedge (7) has stops (22) at both ends, which are designed as projections of the wedge (7) and which comprise the loose part (4).
Schraubzwinge nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß der Keil (7) ein Preßteil ist.
Screw clamp according to one of claims 1 to 4,
characterized,
that the wedge (7) is a pressed part.
Schraubzwinge nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die Formschlußflächen (19,20) jeweils durch eine Riffelung oder Verzahnung gebildet sind, vorzugsweise mit einer Zahn- oder Riffelungstiefe, die in der Größenordnung von etwa 0,1 bis 0,4 mm liegt, sowie insbesondere mit einem Zahn- bzw. Vertiefungsabstand von etwa 1 mm.
Screw clamp according to one of claims 1 to 5,
characterized by
that the interlocking surfaces (19, 20) are each formed by corrugation or toothing, preferably with a tooth or corrugation depth which is of the order of about 0.1 to 0.4 mm, and in particular with a tooth or recess spacing of about 1 mm.
Schraubzwinge nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet,
daß die Formschlußfläche (19) sich in die Anschläge (22) fortsetzt.
Screw clamp according to one of claims 4 to 6,
characterized by
that the form-fitting surface (19) continues in the stops (22).
EP92107467A 1991-05-23 1992-05-01 Clamp Expired - Lifetime EP0514704B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9106330U DE9106330U1 (en) 1991-05-23 1991-05-23 Screw clamp
DE9106330U 1991-05-23

Publications (2)

Publication Number Publication Date
EP0514704A1 true EP0514704A1 (en) 1992-11-25
EP0514704B1 EP0514704B1 (en) 2001-09-12

Family

ID=6867578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107467A Expired - Lifetime EP0514704B1 (en) 1991-05-23 1992-05-01 Clamp

Country Status (4)

Country Link
EP (1) EP0514704B1 (en)
AT (1) ATE205434T1 (en)
DE (2) DE9106330U1 (en)
ES (1) ES2161687T3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672837A2 (en) * 1994-01-25 1995-09-20 ROBERT KRAUSE GmbH &amp; CO. KG Clamp for fixing a support on a panel or the like
US6024350A (en) * 1997-01-14 2000-02-15 Black & Decker Inc. Clamp for a power tool
EP1108503A1 (en) * 1999-12-17 2001-06-20 HERBA-WERKZEUGFABRIK MAX HERBSTRITH GmbH &amp; Co. KG Clamp
EP1813390A2 (en) * 2006-01-27 2007-08-01 Irwin Industrial Tools GmbH Clamping tool or spreader, expecially screw clamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH83728A (en) * 1919-07-10 1920-01-02 Bargehr Haas Heinrich ferrule
US4042264A (en) * 1976-01-12 1977-08-16 Shumer James E Clamping apparatus
FR2423305A1 (en) * 1978-04-18 1979-11-16 Bessey & Sohn SLIDE CALIPER FOR CLAMP
AU524995B2 (en) * 1978-04-10 1982-10-14 Siddons Industries Ltd. Adjustable clamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH83728A (en) * 1919-07-10 1920-01-02 Bargehr Haas Heinrich ferrule
US4042264A (en) * 1976-01-12 1977-08-16 Shumer James E Clamping apparatus
AU524995B2 (en) * 1978-04-10 1982-10-14 Siddons Industries Ltd. Adjustable clamp
FR2423305A1 (en) * 1978-04-18 1979-11-16 Bessey & Sohn SLIDE CALIPER FOR CLAMP

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672837A2 (en) * 1994-01-25 1995-09-20 ROBERT KRAUSE GmbH &amp; CO. KG Clamp for fixing a support on a panel or the like
EP0672837A3 (en) * 1994-01-25 1996-01-24 Krause Robert Gmbh Co Kg Clamp for fixing a support on a panel or the like.
US6024350A (en) * 1997-01-14 2000-02-15 Black & Decker Inc. Clamp for a power tool
EP1108503A1 (en) * 1999-12-17 2001-06-20 HERBA-WERKZEUGFABRIK MAX HERBSTRITH GmbH &amp; Co. KG Clamp
EP1813390A2 (en) * 2006-01-27 2007-08-01 Irwin Industrial Tools GmbH Clamping tool or spreader, expecially screw clamp
EP1813390A3 (en) * 2006-01-27 2009-08-19 Irwin Industrial Tools GmbH Clamping tool or spreader, expecially screw clamp

Also Published As

Publication number Publication date
ES2161687T3 (en) 2001-12-16
DE59209918D1 (en) 2001-10-18
EP0514704B1 (en) 2001-09-12
ATE205434T1 (en) 2001-09-15
DE9106330U1 (en) 1991-09-05

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