EP0537038B1 - Selbstklemmende Zugklemme zum Richten von deformierten Fahrzeugunterteilen - Google Patents

Selbstklemmende Zugklemme zum Richten von deformierten Fahrzeugunterteilen Download PDF

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Publication number
EP0537038B1
EP0537038B1 EP19920402519 EP92402519A EP0537038B1 EP 0537038 B1 EP0537038 B1 EP 0537038B1 EP 19920402519 EP19920402519 EP 19920402519 EP 92402519 A EP92402519 A EP 92402519A EP 0537038 B1 EP0537038 B1 EP 0537038B1
Authority
EP
European Patent Office
Prior art keywords
chain
back portions
recesses
clamp
traction
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
EP19920402519
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English (en)
French (fr)
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EP0537038A1 (de
Inventor
Pierre Legrand
Jean-Marie Marxer
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.)
Blackhawk SA
Original Assignee
Blackhawk SA
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Filing date
Publication date
Application filed by Blackhawk SA filed Critical Blackhawk SA
Publication of EP0537038A1 publication Critical patent/EP0537038A1/de
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Publication of EP0537038B1 publication Critical patent/EP0537038B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
    • B21D1/14—Straightening frame structures
    • B21D1/145—Clamps therefor

Definitions

  • the invention relates to a traction assembly according to the preamble of claim 1, adapted to allow recovery operations on bodywork elements deformed by accident.
  • the traction clamp is connected to the associated traction chain by means of rings, hooks, loops or other accessories, retained by the clamp.
  • the clamping of the clamp on the sheet is generally done, either by screws, or by a clamping cone trapped in the clamp (see for example the document US-A-3.355.777).
  • connection of the chain to the clamp imposes in practice the formation of a loop at the end of the chain, which induces a twisting of this chain end, detrimental to the mechanical strength of this chain.
  • the absence of a loop in document US-A-3,355,777 runs the risk of inadvertent disengagement of the chain hook from the tightening cone.
  • the object of the invention is to overcome the aforementioned drawbacks and therefore in particular to allow a significant reduction in the aforementioned minimum transverse distance, while simplifying the coupling between clamp and chain, without introducing any twisting of the latter.
  • this object is achieved by a traction unit as defined in claim 1.
  • Figure 1 shows how to straighten, conventionally, a deformed body element denoted C, using a conventional clamp 1 and a chain 2.
  • This element C has a sheet edge R taken between the teeth 3 of two jaws 4 cross-coupled to each other by retaining rods here formed of screws 5 and nuts 6.
  • Each jaw has the overall shape of a C with a first end 7 provided on its edge with the abovementioned teeth 3 and a second end 8.
  • the jaws have their concavities turned towards one another, and are generally symmetrical with respect to a confrontation plane marked P, transverse to the screws 5 and parallel to the edges provided with teeth 3.
  • the second ends 8 are inclined relative to the plane P and converge towards the outside of the clamp 1.
  • This bar 9 is integral with a ring 10 through which passes an end section of the chain 2, which ends in a hook 11.
  • This chain 2 is often engaged on a deflection pulley, shown diagrammatically at 12, intended to allow that the tensile force on the chain can be exerted in any direction relative to in plane P, which is particularly advantageous when the rim R on which it is desired to pull is in an area which is not very accessible (for example when it is necessary to pull downwards, on an element situated in the lower part of a box of vehicle).
  • Figure 2 shows a traction assembly according to the invention.
  • the clamp is designated as a whole by the reference 21; it is shown in more detail in FIGS. 3 to 8.
  • the clamp 21 is formed, like the clamp 1 of Figure 1, of two jaws generally C-shaped, coupled to each other by retaining rods, here formed of screws 23 carrying nuts 24, in a configuration in which the concavities of the two jaws are turned towards one another.
  • Each jaw in C has a first end, noted 25 in FIGS. 3, and 5 to 7, the edge 25A of which is provided with hooking teeth 25 ′, here inclined at an angle approximately equal to 30 °, and a second end 26.
  • the screws 23 are closer to the first ends than to the second ends.
  • the jaws 22A and 22B are substantially symmetrical to each other with respect to the plane P of confrontation of the toothed edges of the jaws, at least in this respect, concerns their concave faces. In fact, these concave faces are the same. On the other hand, their outer faces are differentiated by the fact that one, 22A, of the jaws comprises two notches 27 at the bottom of which open holes 28 for the screws 23 and each bordered by two opposite flanks 29 and 29 ′ apart d equal to the width of the hexagon head 30 of the screws 23 thanks to which the latter are locked in rotation.
  • each jaw here the jaw 22A
  • the jaw 22A has on its concave face, between the ends 25 and 26, more precisely between the holes 28 for the screws and the second end 26, a thick plate 31, here forming an integral part of the jaw, and in which are formed imprints.
  • the second end 26 is interrupted in the middle in a zone 26A, in which the plate therefore extends over the entire thickness of this second end.
  • a first notch 32 extends transversely at the ends 25 and 26, from the central zone where the second end is interrupted as far as between the bores 28.
  • this first notch has a bottom, comprising a central portion 32A mistletoe is substantially parallel to the flat surface of the plate 31 and an inclined portion 32B extending, here with an angle of about 30 ° relative to the flat surface of the plate, from this central portion 32A and the central zone where the second end 26 is interrupted.
  • a second notch 33 is arranged at right angles to the first notch 32, that is to say parallel to the first and second ends 25 and 26.
  • This second notch has a bottom comprising a central portion 33A coplanar with the central portion 32A of the bottom of the first cut 32 and two inclined surfaces 33B and 33C extending, here at an angle of about 30 ° relative to the flat surface of the plate, from this central portion to immediate proximity to the flat surface of said plate .
  • At least a third notch 34 (there are two here) can be arranged in the extension of the second notch, having a profile in a portion of a circle (see FIG. 7).
  • the first and second cuts jointly form a kind of cross.
  • the clamp 21 makes it possible to very significantly reduce the minimum clearance L ′ necessary for the positioning of the clamp with the chain and a deflection pulley.
  • FIG. 9 represents a traction regime on the chain, with an inclination of the rest of the chain relative to the links 2A (not visible) and 2B.
  • FIG. 10 shows yet another traction regime applied to the chain, the end link (not visible) being trapped in the second facing impressions.
  • a tensile force on this end section parallel to the ends 25 and 26 here also causes, by wedge effect with the inclined portions 33B or 33C, the clamping of the sections 25A towards one another.
  • the link (noted 2C) of the chain located opposite the link 2A relative to the link 2B does not penetrate, in the example of this figure 10, in the clamp in which case the third fingerprints 34 can be deleted.
  • the third notches 34 serve in fact to accommodate, if necessary, part of such a link 2C in larger clamps parallel to the ends 25 and 26.
  • a single cavity 34 may be sufficient (as may be inclined portions 33B or 33C only) but the presence of the two notches 34 makes it possible to arrange the chain in one direction or the other, in the traction regime of FIG. 10.
  • the regime of Figure 10 allows to exert longitudinal forces on the rim R of the element to be straightened while the regime of Figure 9 allows to exert bias forces.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Claims (7)

  1. Zugkonstruktion zum Richten von verformten Karrosserieelementen, die eine Zugzange (21) und eine aus Gliedern (2A, 2B ...) mit bekannten Abmessungen gebildete Kette (2) umfaßt, wobei diese Zange zwei C-förmige Backen (22A, 22B) umfaßt, die miteinander zu beiden Seiten einer Stoßebene (P) durch Rückhaltestangen (23, 24) gekoppelt sind, so daß die Konkavitäten dieser Backen einander gegenüberstehen, wobei jede Backe ein erstes Ende (25), das eine mit Greifzähnen versehene Schmalkante (25A) besitzt, und ein zweites Ende (26) umfaßt, das gegen die Stoßebene (P) geneigt ist, dadurch gekennzeichnet, daß die Backen (22A, 22B) einander gegenüber Platten (31) besitzen, die zwischen dem ersten und dem zweiten Ende (25, 26) angeordnet und um einen Abstand von im wesentlichen gleich der Dicke (e) eines Glieds (2B) der Kette (2) voneinander entfernt sind und in denen einander gegenüberstehende erste Einschnitte (32, 33) vorgesehen sind, die parallele Bodenabschnitte (32A, 33A) und geneigte Bodenabschnitte (32B, 33B, 33C) umfassen, die von den parallelen Bodenabschnitten (32A, 33A) aus aufeinander zu konvergieren, wobei diese Einschnitte (32, 33) zusammen eine Aussparung zur Aufnahme eines Endglieds (2A) der Kette bilden, wobei eine Zugkraft auf die Kette (2) eine Keilwirkung zwischen diesem Endglied (2A) und den geneigten Bodenabschnitten (32B, 33B, 33C) induziert.
  2. Zugkonstruktion nach Anspruch 1, dadurch gekennzeichnet, daß die Einschnitte (32) quer zu den ersten und zweiten Enden (25, 26) angeordnet sind, wobei die geneigten Bodenabschnitte (32B) in Zonen (26A) aufeinander zu konvergieren, in denen die zweiten Enden (26) unterbrochen sind.
  3. Zugkonstruktion nach Anspruch 1, dadurch gekennzeichnet, daß diese Einschnitte (33) parallel zu den ersten und zweiten Enden (25, 26) angeordnet sind.
  4. Zugkonstruktion nach Anspruch 3, dadurch gekennzeichnet, daß geneigte Bodenabschnitte (33B, 33C) in der Verlängerung der Bodenabschnitte (33A) zu beiden Seiten von diesen vorgesehen sind.
  5. Zugkonstruktion nach Anspruch 3 oder Anspruch 4, dadurch gekennzeichnet, daß wenigstens ein dritter Einschnitt (34) in der Verlängerung, jedoch in einem Abstand von jedem ersten Einschnitt vorgesehen ist, um einen Teil eines zu diesem Endglied (2A) der Kette (2) parallelen Glieds (2C) aufzuehmen.
  6. Zugkonstruktion nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß in den Platten (31) zwei zweite einander gegenüberstehende Einschnitte (33, 32) vorgesehen sind, die quer zu den ersten Einschnitten (32, 33) angeordnet sind und zweite parallele Bodenabschnitte und zweite geneigte Bodenabschnitte umfassen, die von diesen parallelen Bodenabschnitten aus aufeinander zu konvergieren, wobei die parallelen Bodenabschnitte der ersten und zweiten Einschnitte koplanar sind und diese zweiten Einschnitte (33, 32) zusammen eine zweite Aussparung zur Aufnahme des Endglieds (2A) der Kette (2) bilden.
  7. Zugkonstruktion nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Platten (31) zwischen den Rückhaltestangen (23, 24) und den zweiten Enden (26) gelegen sind.
EP19920402519 1991-10-11 1992-09-15 Selbstklemmende Zugklemme zum Richten von deformierten Fahrzeugunterteilen Expired - Lifetime EP0537038B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112553 1991-10-11
FR9112553A FR2682310B1 (fr) 1991-10-11 1991-10-11 Pince de traction autoserrante pour le redressement d'elements de carrosserie deformes.

Publications (2)

Publication Number Publication Date
EP0537038A1 EP0537038A1 (de) 1993-04-14
EP0537038B1 true EP0537038B1 (de) 1996-07-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920402519 Expired - Lifetime EP0537038B1 (de) 1991-10-11 1992-09-15 Selbstklemmende Zugklemme zum Richten von deformierten Fahrzeugunterteilen

Country Status (3)

Country Link
EP (1) EP0537038B1 (de)
DE (2) DE69212423T2 (de)
FR (1) FR2682310B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT239998Y1 (it) * 1995-04-06 2001-03-16 Francesco Giovignani Morsetto tendilamiera per riparazione di carrozzerie di autovetture
US8992076B2 (en) 2010-12-15 2015-03-31 Waters Gmbh Dilatometer for measuring metallic samples

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355777A (en) * 1966-03-30 1967-12-05 Mojelski William Tension actuated clamp
JPS5149092B2 (de) * 1973-07-05 1976-12-24
FR2519574A1 (fr) * 1982-01-08 1983-07-18 Celette Sa Pince de traction

Also Published As

Publication number Publication date
EP0537038A1 (de) 1993-04-14
FR2682310B1 (fr) 1994-01-14
FR2682310A1 (fr) 1993-04-16
DE69212423T2 (de) 1996-12-05
DE537038T1 (de) 1993-10-14
DE69212423D1 (de) 1996-08-29

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