EP0514704B1 - Clamp - Google Patents

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Publication number
EP0514704B1
EP0514704B1 EP92107467A EP92107467A EP0514704B1 EP 0514704 B1 EP0514704 B1 EP 0514704B1 EP 92107467 A EP92107467 A EP 92107467A EP 92107467 A EP92107467 A EP 92107467A EP 0514704 B1 EP0514704 B1 EP 0514704B1
Authority
EP
European Patent Office
Prior art keywords
rail
wedge
moveable part
loose part
screw clamp
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
EP92107467A
Other languages
German (de)
French (fr)
Other versions
EP0514704A1 (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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Publication date
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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Expired - Lifetime legal-status Critical Current

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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 the preamble of claim 1.
  • Such a screw clamp is from document AU-B-524 995 known.
  • the Wedge (insert) with its two projections (extensions) the front and back of the movable loose part (jaw) rest so that the wedge only in the longitudinal direction the lot part, i.e. perpendicular to the rail, is movable. If then the loose part when tensioning the clamping device is tilted relative to the rail, because of the Apply the projections on the loose part of the wedge accordingly tilted, so that only the end tooth of the Gearing of the wedge in the corresponding gearing of the Rail engages. So obviously it has to be a relatively coarse interlocking in order to at all To be able to absorb the resulting stress.
  • the present invention has for its object a Screw clamp of the aforementioned generic type to create the one with low manufacturing costs good locking of the loose part relative when tensioning guaranteed to the rail, but on the other hand a particularly low wear in the area of the interacting Form-fit surfaces is subjected, so that a long shelf life or use time are guaranteed can.
  • the wedge thus lies as a separate component so loose between the rail and the loose part that he when the loose part tilts with its form-fitting surface engages with the form-fitting surface of the rail, wherein him the necessary movement over his pressure surface is forced by the lot part.
  • the relatively low mobility of the wedge of particular Importance Due to its low mobility, it can himself under the constraint of tipping the loose part on him is always aligned so that he is at the same time with a larger length range in engagement with the rail is.
  • This measure can be surprisingly simple Way to achieve the additional advantage that the total load-bearing surface of the form-fitting surface in engagement is enlarged. By enlarging the Carrying area, the pressure between the two is engaged located areas reduced, causing wear is reduced by wear.
  • the screw clamp 1 according to the invention shown in FIG. 1 consists of a rail 2, at one end at right angles a fixed jaw (fixed part) 3 is attached. The firm The jaw 3 is firmly attached to the rail 2. Furthermore, the screw clamp 1 has a movable clamping jaw (Loose part) 4, which along the rail 2 in both directions shown by arrow 5 is led.
  • the lead part 4 has a guide slit-shaped opening lying in the plane of the drawing 6 on, the total width B by a small game S larger than the width b of the rail 2 plus the thickness D a wedge 7 located between rail 2 and loose part 4.
  • the clamping device 9 in this case consists of a threaded spindle 11, which is rotatable in a threaded bore 12 sits at the free end 13 of the loose part 4.
  • a booklet 14 rotatably with the Connected threaded spindle 11 and serves to tighten the threaded spindle 11 by hand.
  • the pressure plate 15 which the counter pressure surface 16 on 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 counter pressure surface on opposite Workpiece surfaces are in contact.
  • 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, over its entire length, an associated form-fitting surface 20 with which the form-fitting surface 19 of the wedge 7 can engage in any possible displacement position.
  • the mutually facing positive locking 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 in 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 screw clamp 1 according to the invention is guaranteed. The mode of operation will be explained in more detail later.
  • the wedge 7 is slightly movable on the loose part 4 stored, in such a way that in the drawing both after right and left, as well as a little up and down Has freedom of movement.
  • the freedom of movement upwards and below is limited by the protrusions 22, which on the Ends of the wedge 7 sit and from above and below with one protrude little game over the lot 4.
  • the projections 22 act as attacks and take effect as soon as they turn support against the loose part 4.
  • the freedom of movement after right and left corresponds to the game S already explained.
  • the wedge 7 is U-shaped Cross section and the breakthrough in the loose part 4 on both sides with its opposite parallel ones Grips projections 22 with a small distance.
  • the wedge 7 is so flexible that it has a small Tilting movement around a perpendicular to the paper plane Can perform vertical axis.
  • a Pressure surface 21 of a boundary wall of the opening 6 in in this case the one on the left directly opposite.
  • Such clamps are required, for example, to a workpiece 10, consisting of two boards, when gluing to squeeze.
  • the first is Lot part 4 as far as direction 5 to the fixed part 3 along the Rail 2 moved until the pressure plate 15 and the counter pressure surface 16 clamp the workpiece 10 between them.
  • the loose part 4 is substantially rectangular 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 one have so much freedom of movement that they are not mutual Are intervention. Should the form-fitting surfaces touching occasionally, so they slide while touching hers sloping tooth flanks so that the wedge within evades its freedom of movement, and the longitudinal movement of the lot part does not hinder.
  • the loose part 4 must be open before pressing the rail 2 must be fixed in an anti-slip manner.
  • the anti-slip Fixation occurs in the screw clamp according to the invention by the interaction of the game S between the lost part and Rail and the form-fitting surfaces between the wedge and Rail.
  • F Fig. 3
  • the tilting movement is shown with directional arrow 18 (Fig. 3).
  • Fig. 3 At this tilting movement presses part of the pressure surface 21 of the Losteils 4 on the wedge, which in turn under this constraint tries to avoid. It can only go towards the rail 2 dodge, and comes with its form-fitting surface 19 in engagement with the associated form-fitting surface 20 of the Track 2. At this moment two different ones are working Tipping moments on him.
  • the loose part 4 is on the rail 2 canted and clamped diagonally between the clamping point 25 and the area 24.
  • the pressure developed is distributed on a variety of teeth in the range 24 and on the area of the clamping point 25 Surface pressure in the area of the teeth so low that a plastic deformation of the teeth is excluded.
  • a light blow is sufficient to release the clamp connection the opposite direction against the loose part 4, e.g. against the face 26, and the anti-slip engagement gets apart.
  • Such clamps are tools which are produced in large numbers. Manufacturing the wedge as a pressed part is advantageous here.
  • the invention is not limited to clamps which the clamping device consists of at the end of the loose part consists in a threaded spindle, but can also be used with other screw clamps; for example on screw clamps where the clamping device is designed as a clamping eccentric, in which the clamping effect due to the rotation of the eccentric steadily increasing eccentric radius occurs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Pinball Game Machines (AREA)
  • Surgical Instruments (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Control Of Motors That Do Not Use Commutators (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 nach dem Oberbegriff des Anspruchs 1.The present invention relates to a screw clamp the preamble of claim 1.

Eine derartige Schraubzwinge ist aus dem Dokument AU-B-524 995 bekannt. Nach der sich daraus ergebenden Lehre soll der Keil (insert) mit seinen beiden Vorsprüngen (extensions) an der Vorder- und Rückseite des beweglichen Losteils (jaw) anliegen, so daß der Keil ausschließlich in Längsrichtung des Losteils, d.h. senkrecht zu der Schiene, beweglich ist. Wenn dann beim Spannen der Spanneinrichtung das Losteil relativ zur Schiene verkippt wird, wird hierdurch wegen der Anlage der Vorsprünge am Losteil der Keil entsprechend mit verkippt, so daß nachfolgend nur der endseitige Zahn der Verzahnung des Keils in die entsprechende Verzahnung der Schiene eingreift. Deshalb muß es sich offensichtlich um eine relativ grobe Verzahnung handeln, um überhaupt die bei Spannbelastung entstehenden Kräfte aufnehmen zu können. Dabei ist aber von Nachteil, daß durch den nur einen wirksamen Zahn des Keils nur eine punktuelle bzw. linienförmige Belastung vorhanden ist, so daß die Gefahr einer plastischen Verformung der in Eingriff stehenden gegenüberliegenden Zähne besteht. Nach einer bestimmten Gebrauchszeit kann deshalb aus der Verzahnung schließlich verschleißbedingt eine Art Wellung entstehen, mit der dann die ursprünglich hohe Spannkraft der Schraubzwinge nicht mehr erreicht werden kann.Such a screw clamp is from document AU-B-524 995 known. According to the resulting teaching, the Wedge (insert) with its two projections (extensions) the front and back of the movable loose part (jaw) rest so that the wedge only in the longitudinal direction the lot part, i.e. perpendicular to the rail, is movable. If then the loose part when tensioning the clamping device is tilted relative to the rail, because of the Apply the projections on the loose part of the wedge accordingly tilted, so that only the end tooth of the Gearing of the wedge in the corresponding gearing of the Rail engages. So obviously it has to be a relatively coarse interlocking in order to at all To be able to absorb the resulting stress. there but is disadvantageous in that only one effective Tooth of the wedge only a punctiform or linear one Load is present, so that the danger of plastic Deformation of the engaged opposite one another Teeth. After a certain period of use therefore finally due to wear from the gearing a kind of curl, with which the original high clamping force of the screw clamp can no longer be achieved can.

Aus dem Dokument US-A-1 639 561 ist vom Grundaufbau her ebenfalls eine Schraubzwinge bekannt, allerdings sind dabei keine Formschlußflächen vorgesehen, da die Schiene keinerlei Verzahnung oder dergleichen aufweist. Ein weiterer Unterschied zur vorliegenden Gattung ist, daß im Losteil auf beiden gegenüberliegenden Schmalseiten der Schiene zwei verzahnte, in Schienenlängsrichtung gegeneinander versetzte Klemmstücke angeordnet sind, die mit der glattflächigen Schiene ausschließlich kraftschlüssig, allenfalls kraftformschlüssig, zusammenwirken können. Es handelt sich somit um ein grundlegend anderes Funktionsprinzip als beim Gegenstand der vorliegenden Erfindung.From the document US-A-1 639 561 is the basic structure a screw clamp is also known, but is included no form-fitting surfaces are provided, since the rail does not have any Has teeth or the like. Another difference to the present genus is that in the lot part two opposite narrow sides of the rail two toothed, staggered in the longitudinal direction of the rails Clamping pieces are arranged with the smooth surface Rail only non-positive, at most non-positive, can work together. So it is a fundamentally different operating principle than the object of the present invention.

Bei einer weiterhin bekannten Schraubzwinge 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. 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. Zusätzlich bedarf das Gewinde einer Sicherung, um trotz der ständig auf den Gewindestift wirkenden Seitenkräfte eine Lösen des Gewindestiftes zu vermeiden.In a screw clamp that is still known, the positive connection between rail and loose part to inhibit longitudinal movement of the loose part on the rail on the one hand by a threaded screw screwed into the loose part and on the other hand by means of transverse teeth running along the rail educated. The grub screw sits in one threaded hole in the longitudinal direction of the rail, whereby it is only partially surrounded by the threaded hole. The threaded hole is namely on the rail facing Cut side so that the grub screw there with part of its thread teeth exposed. With this exposed area, he can with appropriate Tilting movement of the loose part with the associated toothing engage in positive engagement on the rail and so prevent slipping. A disadvantage of these screw clamps is the relatively high manufacturing effort with a Variety of operations. First of all, thread production a hole is pre-drilled in which then the thread is cut. Then the The hole is cut by milling, then the Carefully screw the setscrew into the cut thread. In addition, the thread needs a fuse, around despite the side forces constantly acting on the grub screw to avoid loosening the grub screw.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Schraubzwinge der eingangs genannten, gattungsgemäßen Art zu schaffen, die mit geringem Herstellungsaufwand einerseits beim Spannen eine gute Arretierung des Losteils relativ zu der Schiene gewährleistet, dabei aber andererseits einem besonders geringen Verschleiß im Bereich der zusammenwirkenden Formschlußflächen unterworfen ist, so daß eine lange Haltbarkeit bzw. Gebrauchszeit gewährleistet werden kann.The present invention has for its object a Screw clamp of the aforementioned generic type to create the one with low manufacturing costs good locking of the loose part relative when tensioning guaranteed to the rail, but on the other hand a particularly low wear in the area of the interacting Form-fit surfaces is subjected, so that a long shelf life or use time are guaranteed can.

Erfindungsgemäß wird dies durch die kennzeichnenden Merkmale des Anspruchs 1 erreicht.According to the invention, this is due to the characteristic features of claim 1 achieved.

Erfindungsgemäß liegt somit der Keil als separates Bauteil derart lose zwischen der Schiene und dem Losteil, 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 thus lies as a separate component so loose between the rail and the loose part that he when the loose part tilts with its form-fitting surface engages with the form-fitting surface of the rail, wherein him the necessary movement over his pressure surface is forced by the lot part. Here is the relatively low mobility of the wedge of particular Importance. Due to its low mobility, it can himself under the constraint of tipping the loose part on him is always aligned so that he is at the same time with a larger length range in engagement with the rail is. This measure can be surprisingly simple Way to achieve the additional advantage that the total load-bearing surface of the form-fitting surface in engagement is enlarged. By enlarging the Carrying area, the pressure between the two is engaged located areas reduced, causing wear is reduced by 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 de beiliegenden Zeichnungen dargestellten Ausführungsbeispiels wird die Erfindung nunmehr näher erläutert werden.Using the illustrated in the accompanying drawings The embodiment will now be explained in more detail become.

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 screw clamp according to the invention in the area designated II, 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 at right angles a fixed jaw (fixed part) 3 is attached. The firm The jaw 3 is firmly attached to the rail 2. Furthermore, the screw clamp 1 has a movable clamping jaw (Loose part) 4, which along the rail 2 in both directions shown by arrow 5 is led. The lead part 4 has a guide slit-shaped opening lying in the plane of the drawing 6 on, the total width B by a small game S larger than the width b of the rail 2 plus the thickness D a wedge 7 located between rail 2 and 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 Lot 4 relative to the rail a tilting movement with the relative small tilt angle alpha (8) can perform.

Diese Kippbewegung ist an sich bekannt und soll ein Abrutschen des Losteils 4 auf der Schiene 2 beim Benutzen der Schraubzwinge zum Pressen 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 slide off of the loose part 4 on the rail 2 when using the Prevent screw clamp for pressing a workpiece 10. The clamping device 9 in this case consists of a threaded spindle 11, which is rotatable in a threaded bore 12 sits at the free end 13 of the loose part 4. At her from the fixed part 3 opposite end is a booklet 14 rotatably with the Connected threaded spindle 11 and serves to tighten the threaded spindle 11 by hand. Carries at her other end the threaded spindle 11, preferably mounted in a somewhat movable manner, the pressure plate 15, which the counter pressure surface 16 on 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 counter pressure surface on opposite Workpiece surfaces are in contact.

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.
Die Funktionsweise wird später noch genauer erläutert.
The detail according to the invention designated II in FIG. 1 will now be 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, over its entire length, an associated form-fitting surface 20 with which the form-fitting surface 19 of the wedge 7 can engage in any possible displacement position. The mutually facing positive locking 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 in 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 screw clamp 1 according to the invention is guaranteed.
The mode of operation will be explained in more detail later.

Weiterhin ist der Keil 7 gering beweglich an dem Losteil 4 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.Furthermore, the wedge 7 is slightly movable on the loose part 4 stored, in such a way that in the drawing both after right and left, as well as a little up and down Has freedom of movement. The freedom of movement upwards and below is limited by the protrusions 22, which on the Ends of the wedge 7 sit and from above and below with one protrude little game over the lot 4. The projections 22 act as attacks and take effect as soon as they turn support against the loose part 4. The freedom of movement after right and left corresponds to the game S already explained. As a special feature it can be seen that the wedge 7 is U-shaped Cross section and the breakthrough in the loose part 4 on both sides with its opposite parallel ones Grips projections 22 with a small distance. As a result the wedge 7 is so flexible that it has a small Tilting movement around a perpendicular to the paper plane Can perform vertical axis. On its from the Form-fitting surface 19 facing away from it lies with a Pressure surface 21 of a boundary wall of the opening 6 (in 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.Such clamps are required, for example, to a workpiece 10, consisting of two boards, when gluing to squeeze. In this process, the first is Lot part 4 as far as direction 5 to the fixed part 3 along the Rail 2 moved 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 rectangular 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 one have so much freedom of movement that they are not mutual Are intervention. Should the form-fitting surfaces touching occasionally, so they slide while touching hers sloping tooth flanks so that the wedge within evades its freedom of movement, and the longitudinal movement of the lot part does not hinder.

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 counter pressure surface the workpiece 10 pinching between yourself, you strive to squeeze the Workpiece by tightening the threaded spindle 11 over the Book 14. However, the loose part would oppose it in the Remove the direction from the workpiece 10 to the same extent, how to intend the pressure plate 15 on the Press 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 open before pressing the rail 2 must be fixed in an anti-slip manner. The anti-slip Fixation occurs in the screw clamp according to the invention by the interaction of the game S between the lost part and Rail and the form-fitting surfaces between the wedge and Rail. By a slight pressure F (Fig. 3) on the the rail 2 located end of the loose part 4 is this moved a little further towards the fixed part 3. It moves away from its right-angled position Rail out and tilts by the angle alpha (8). The tilting movement is shown with directional arrow 18 (Fig. 3). At this tilting movement presses part of the pressure surface 21 of the Losteils 4 on the wedge, which in turn under this constraint tries to avoid. It can only go towards the rail 2 dodge, and comes with its form-fitting surface 19 in engagement with the associated form-fitting surface 20 of the Track 2. At this moment two different ones are working Tipping moments on him.

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.Tried the counterforce exerted by the rail turn it clockwise, and the force exerted by the pressure surface 21 also. Hereby he performs within his limited freedom of movement a tilting movement 23 and therefore arrives more teeth of his than z. B. tooth surface trained interlocking surface 19 in engagement with the Form-fit surface 20 rail 2 until it is in one Area 24 with a plurality of teeth of the rail in the Intervention is.

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 is on the rail 2 canted and clamped diagonally between the clamping point 25 and the area 24. The pressure developed is distributed on a variety of teeth in the range 24 and on the area of the clamping point 25 Surface pressure in the area of the teeth so low that a 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 tooth surfaces in mesh 19 and 20 is the loose part 4 in the axial direction of the rail fixed, 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.A light blow is sufficient to release the clamp connection the opposite direction against the loose part 4, e.g. against the face 26, and the anti-slip engagement gets apart.

Zur Montage:For assembly:

Die Montage der erfindungsgemäßen Schraubzwinge ist denkbar einfach.The assembly of the screw clamp according to the invention is conceivable 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 rail 2 and fixed part 3 firmly connected are, the wedge 7 in the opening 6 of the loose part 4th inserted and pushed against the pressure surface 21. After that the rail 2 through the remaining opening 6 of the Loose part 4 inserted, 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.Such clamps are tools which are produced in large numbers. Manufacturing the wedge as a pressed part is advantageous here.

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 clamps which the clamping device consists of at the end of the loose part consists in a threaded spindle, but can also be used with other screw clamps; for example on screw clamps where the clamping device is designed as a clamping eccentric, in which the clamping effect due to the rotation of the eccentric steadily increasing eccentric radius occurs.

Claims (5)

  1. Screw clamp (1) with a rail (2), at one end of which a fixed jaw is seated as the fixed part (3) and along which a moveable clamping jaw is guided in a displaceable manner, as the moveable part (4), with the clamping device (9), such that there is play between the rail (2) and moveable part (4) which allows the moveable part (4) to tilt on the rail, it being the case that it is possible to produce, between the rail (2) and moveable part (4), a form fit which inhibits the longitudinal movement of the moveable part (4) on the rail (2) and is formed by a wedge (7), located between the moveable part (4) and rail (2), in that the wedge (7) has a form-fit surface (19) which interacts with a corresponding form-fit surface (20) of the rail (2), it being the case that the moveable part (4) has a through-passage (6) for the rail (2) and the wedge (7) is also seated within the through-passage (6), it being the case that the wedge (7) is of U-shaped design with protrusions (22) which project out of the through-passage (6) at both ends, enclose the moveable part (4) and have the form-fit surface (19) of the wedge (7) continuing into them, and it being the case that the form-fit surfaces (19, 20) of the wedge (7) and rail (2) are each designed as a grooved formation or toothing formation, characterized in that the wedge (7) is arranged, between the rail (2) and the moveable part (4), with play both longitudinally and transversely within the through-passage (6), and such that it can be aligned as a result, such that, under the influence of the tilting movement of the moveable part (4) which occurs during clamping of the clamping device (9), the wedge (7) can be tilted towards the rail (2) and thus, in a region (24) of its form-fit surface (19), simultaneously passes into engagement, by way of a multiplicity of its grooves or teeth, with a multiplicity of grooves or teeth of the rail (2).
  2. Screw clamp according to Claim 1, characterized in that the wedge (7) is arranged in a through-passage (6) on that side of the rail (2) which is directed towards the clamping device (9).
  3. Screw clamp according to Claim 1 or 2, characterized in that the protrusions (22) of the wedge (7) form stops for bounding the allowance for movement of the wedge (7).
  4. Screw clamp according to one of Claims 1 to 3, characterized in that the wedge (7) is a pressed part.
  5. Screw clamp according to one of Claims 1 to 4, characterized in that the grooved formation or toothing formation is designed with a groove depth or tooth depth of the order of magnitude of from 0.1 to 0.4 mm and with a depression spacing or tooth spacing of approximately 1 mm.
EP92107467A 1991-05-23 1992-05-01 Clamp Expired - Lifetime EP0514704B1 (en)

Applications Claiming Priority (2)

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

Publications (2)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4402031A1 (en) * 1994-01-25 1995-07-27 Krause Robert Gmbh Co Kg Clamp for pivot arm holder to plate
US6024350A (en) * 1997-01-14 2000-02-15 Black & Decker Inc. Clamp for a power tool
DE29922235U1 (en) * 1999-12-17 2000-03-02 HERBA Werkzeugfabrik Max Herbstrith GmbH & Co KG, 42899 Remscheid Screw clamp
DE202006001331U1 (en) * 2006-01-27 2007-05-31 Irwin Industrial Tools Gmbh Clamping and / or spreading tool, in particular screw clamp

Family Cites Families (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
DE2816688C3 (en) * 1978-04-18 1980-12-04 Bessey & Sohn Gmbh & Co, 7000 Stuttgart Locking device for the movable jaws of a clamp, in particular a screw clamp

Also Published As

Publication number Publication date
DE9106330U1 (en) 1991-09-05
EP0514704A1 (en) 1992-11-25
ATE205434T1 (en) 2001-09-15
ES2161687T3 (en) 2001-12-16
DE59209918D1 (en) 2001-10-18

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