EP0514704A1 - Serre joint - Google Patents

Serre joint Download PDF

Info

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)
English (en)
Other versions
EP0514704B1 (fr
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
Priority date (The priority date 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 date listed.)
Filing date
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/fr
Application granted granted Critical
Publication of EP0514704B1 publication Critical patent/EP0514704B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/10—Arrangements for positively actuating jaws using screws
    • B25B5/102—Arrangements for positively actuating jaws using screws with at least one jaw sliding along a bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/068—Arrangements for positively actuating jaws with at least one jaw sliding along a bar

Definitions

  • the 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)
EP92107467A 1991-05-23 1992-05-01 Serre joint Expired - Lifetime EP0514704B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9106330U 1991-05-23
DE9106330U DE9106330U1 (fr) 1991-05-23 1991-05-23

Publications (2)

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

Family

ID=6867578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107467A Expired - Lifetime EP0514704B1 (fr) 1991-05-23 1992-05-01 Serre joint

Country Status (4)

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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672837A2 (fr) * 1994-01-25 1995-09-20 ROBERT KRAUSE GmbH & CO. KG Pince pour la fixation d'un support sur un panneau ou pareille
US6024350A (en) * 1997-01-14 2000-02-15 Black & Decker Inc. Clamp for a power tool
EP1108503A1 (fr) * 1999-12-17 2001-06-20 HERBA-WERKZEUGFABRIK MAX HERBSTRITH GmbH & Co. KG Serre-joint
EP1813390A2 (fr) * 2006-01-27 2007-08-01 Irwin Industrial Tools GmbH Outil de serrage ou d'écartement, notamment serre-joint à serrage par vis

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH83728A (de) * 1919-07-10 1920-01-02 Bargehr Haas Heinrich Zwinge
US4042264A (en) * 1976-01-12 1977-08-16 Shumer James E Clamping apparatus
FR2423305A1 (fr) * 1978-04-18 1979-11-16 Bessey & Sohn Etrier a glissiere pour serre-joint
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 (de) * 1919-07-10 1920-01-02 Bargehr Haas Heinrich Zwinge
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 (fr) * 1978-04-18 1979-11-16 Bessey & Sohn Etrier a glissiere pour serre-joint

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0672837A2 (fr) * 1994-01-25 1995-09-20 ROBERT KRAUSE GmbH & CO. KG Pince pour la fixation d'un support sur un panneau ou pareille
EP0672837A3 (fr) * 1994-01-25 1996-01-24 Krause Robert Gmbh Co Kg Pince pour la fixation d'un support sur un panneau ou pareille.
US6024350A (en) * 1997-01-14 2000-02-15 Black & Decker Inc. Clamp for a power tool
EP1108503A1 (fr) * 1999-12-17 2001-06-20 HERBA-WERKZEUGFABRIK MAX HERBSTRITH GmbH & Co. KG Serre-joint
EP1813390A2 (fr) * 2006-01-27 2007-08-01 Irwin Industrial Tools GmbH Outil de serrage ou d'écartement, notamment serre-joint à serrage par vis
EP1813390A3 (fr) * 2006-01-27 2009-08-19 Irwin Industrial Tools GmbH Outil de serrage ou d'écartement, notamment serre-joint à serrage par vis

Also Published As

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

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