EP4008480B1 - Dispositif de serrage - Google Patents

Dispositif de serrage Download PDF

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Publication number
EP4008480B1
EP4008480B1 EP21211949.9A EP21211949A EP4008480B1 EP 4008480 B1 EP4008480 B1 EP 4008480B1 EP 21211949 A EP21211949 A EP 21211949A EP 4008480 B1 EP4008480 B1 EP 4008480B1
Authority
EP
European Patent Office
Prior art keywords
clamping
thread
connector member
clamping device
counter
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.)
Active
Application number
EP21211949.9A
Other languages
German (de)
English (en)
Other versions
EP4008480A1 (fr
EP4008480C0 (fr
Inventor
Detlef Lindenschmidt
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.)
IMA Schelling Deutschland GmbH
Original Assignee
IMA Schelling Deutschland 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 IMA Schelling Deutschland GmbH filed Critical IMA Schelling Deutschland GmbH
Publication of EP4008480A1 publication Critical patent/EP4008480A1/fr
Application granted granted Critical
Publication of EP4008480B1 publication Critical patent/EP4008480B1/fr
Publication of EP4008480C0 publication Critical patent/EP4008480C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • 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
    • B25B5/16—Details, e.g. jaws, jaw attachments

Definitions

  • the invention relates to a clamping device according to the preamble of claim 1.
  • Such clamping devices are usually used in the form of vertical clamps for clamping workpieces and are, for example EP 3 593 946 A1 and DE 101 08 134 A1 known.
  • the workpiece which can be a workpiece made of any material, in particular wood or wood substitutes or plastics or metals, is clamped between two clamping elements of the clamping device.
  • the two clamping elements each have a clamping surface which rests on opposite sides of the workpiece in the clamped state. In the released state, the workpiece rests on one clamping surface due to gravity, while a gap is created between the other clamping surface and the workpiece. This gap should generally be large enough to be able to insert a specific workpiece between the two clamping surfaces.
  • this approach also results in problems in practice. After the workpiece has been placed between the two clamping surfaces, they must then be clamped.
  • this gap dimension known as the clamping stroke, which is formed between one clamping surface and the workpiece in the released state, must generally be dimensioned in such a way that, for example, a Finger cannot reach into this gap. There is therefore a need to be able to individually change a corresponding clamping stroke depending on the workpiece used.
  • the clamping stroke can only be adjusted in discrete steps because the spacer used has different steps.
  • a piston rod in which the total stroke of the piston can be changed, a piston rod must be moved manually within a guide.
  • the setting of a predefined clamping stroke is only possible in a relatively imprecise manner.
  • the object of the present invention is to improve a generic clamping device in such a way that it is possible to set the clamping stroke as precisely as possible.
  • the clamping device according to the invention which can in particular be designed as a vertical clamp, can be used for clamping workpieces, in particular those made of wood or wood substitutes, plastics or metals.
  • the clamping device has a first clamping element with a first clamping surface and a second clamping element with a second clamping surface facing the first clamping surface.
  • the first clamping element and the second clamping element can be moved relative to one another via a drive device for clamping or releasing a workpiece between the clamping surfaces.
  • the first clamping element is attached to a connecting piece having a first thread or is formed in one piece with it.
  • the second clamping element is mounted on a bearing section. In the bearing section, a clamping element that is movable relative to the bearing section is again displaceably mounted.
  • the clamping element has a mating thread that matches the first thread. According to the invention it is now provided that the connecting piece and the clamping element are connected to one another via the thread and the mating thread.
  • the clamping device thus enables easy adjustment of the first clamping element relative to the second clamping element, in which both are connected to one another via the connecting piece and a thread.
  • first clamping element By rotating the first clamping element, it can be moved relative to the second clamping element, so that the relative position of the first clamping surface can be moved to the second clamping surface.
  • desired clamping stroke can be continuously adjusted depending on the size of the workpiece.
  • the clamping device comprises a cylinder in which the clamping element is displaceably guided in the form of a piston.
  • the displacement of the piston can be accomplished in different ways in order to clamp the clamping device and clamp the workpiece.
  • the cylinder can be set up in such a way that the clamping element moves the first clamping surface towards the second clamping surface by evacuating or building up pressure in the cylinder.
  • the clamping device according to the invention can be arranged, for example, on a suction cross member which evacuates the interior of the cylinder.
  • the interior of the cylinder can of course also be filled with a fluid in order to activate the clamping device.
  • the axial direction of the thread and the counter-thread preferably runs perpendicular to the clamping surfaces.
  • the relative rotation between the connecting piece and the clamping element causes a change in the distance between the two clamping surfaces.
  • a relative rotation between the connecting piece and the clamping element merely opens up the possibility of allowing a relative adjustment of the clamping stroke.
  • a slight rotation of the connecting piece relative to the clamping element enables a relative axial displacement of the two clamping surfaces to one another. So the mutual twisting itself can act or cancel a locking of the distance between the two clamping surfaces.
  • the connecting piece has a releasable first anti-rotation device which is designed to prevent a relative rotation between the connecting piece and the clamping element in the locked state and to enable such a relative rotation in the released state.
  • This anti-twist device ensures, above all, that the clamping stroke is prevented from changing inadvertently during normal operation of the clamping device.
  • the first anti-rotation device comprises a tension element which is guided through the connecting piece. In this way, the anti-twist protection can take place independently of the connecting piece and the clamping element. Consequently, the locking mechanism is also decoupled from this.
  • the tension element can be tightened or loosened by hand by a person.
  • a preferred embodiment provides that the tension element is coupled to a lock nut at the end facing away from the first clamping surface, the thread of which engages in the counter thread of the clamping element.
  • the lock nut ensures that the connector cannot be turned any further than absolutely necessary.
  • the lock nut and tension element are partially decoupled, so that the connecting piece can be rotated relative to the clamping element.
  • the tension element tightens the lock nut so that relative rotation between the connecting piece and the clamping element is no longer possible.
  • the tension element can be designed as a tension screw which is rotatably coupled to the lock nut. This causes the tension screw to pull the lock nut against the connecting piece when it is locked, thus blocking the relative rotation between the connecting piece and the clamping element.
  • a second anti-twist device is effective between the components mentioned, which prevents the relative rotation of the lock nut and the connecting piece and only enables their axial displacement.
  • Such an anti-twist device can, for example, be designed in such a way that the lock nut and connecting piece mesh with one another via a tongue and groove connection.
  • the lock nut can have a corresponding spring which engages in a groove provided in the connecting piece.
  • a tongue and groove to be attached to the lock nut or the connecting piece.
  • Clamping device 1 is preferably aligned as a vertical clamp, with the lifting movement for clamping or releasing a workpiece then taking place in the vertical direction Z.
  • the workpiece is clamped between a first clamping element 2 with a first clamping surface 2a and a second clamping element 7 with an associated second clamping surface 7a.
  • the two clamping surfaces 2a and 7a lie opposite one another in the stroke direction Z and can be moved relative to one another in this direction.
  • a clamping element 8 is provided for this relative movement, which is displaceable in the stroke direction Z relative to a bearing section 5 in which there is a plain bearing 5a for guiding the clamping element 8.
  • the clamping element 8 is connected to the clamping element 2 via a connecting piece 10.
  • the bearing section 5 is fixedly arranged on a base section of the clamping device 1.
  • the entire clamping device 1 can preferably be connected to a substructure 12, not shown here.
  • the substructure 12 can preferably have a suction device or compressed air device via which the clamping device 1 can be actuated.
  • the workpiece 4 is placed between the two clamping surfaces 2a and 7a.
  • the workpiece itself has the height h in the stroke direction Z. This means that the two clamping surfaces 2a and 7a must be at least apart by the distance h plus a clamping stroke d for inserting or removing the workpiece.
  • the clamping stroke d must, if possible, not reach the thickness of a human finger, so that it can be avoided that a finger can be trapped between the top of the workpiece 4 and the upper clamping surface 2a.
  • the distance d + h between the two clamping surfaces 2a and 7a must be adjusted.
  • the connecting piece 10 is provided with an external thread 10a, which is screwed into a corresponding internal thread 8a of the clamping element 8.
  • the clamping element 8 itself is preferably designed as a piston which is mounted in a cylinder 9 so that it can move in the stroke direction Z.
  • the clamping element 8 can be moved in the stroke direction Z, for example by evacuating the displacement of the cylinder 9, so that the surface 2a moves towards the surface 7a and the workpiece 4 is clamped between the surfaces 2a and 7a. Accordingly, ventilation of the displacement of the cylinder 9 ensures that the tension is released.
  • it is also possible to move the clamping element in another way for example to initiate the clamping process using compressed air and to release the clamping process accordingly by evacuation.
  • other drives are also fundamentally conceivable.
  • the clamping device according to the invention has a first anti-twist device. This is formed by a lock nut 6, which, like the connecting piece 10, has an external thread 6a, with which it is screwed into the internal thread 8a of the clamping element 8.
  • the lock nut 6 is also secured with a further anti-twist device against rotation relative to the connecting piece 10.
  • the lock nut 6 has a projection 6b, which dips into a corresponding recess 10b in the connecting piece 10. But the projection and recess could just as easily be arranged on the other component.
  • the clamping device 1 according to the invention can be adjusted particularly conveniently with regard to the clamping stroke to be set and fixed in any desired adjustment position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)

Claims (9)

  1. Dispositif de serrage (1), surtout tendeur vertical, pour serrer des pièces (4), surtout ceux en bois ou en matériaux de substitution du bois, en matière plastique ou en métal, comportant:
    un premier élément de serrage (2) avec une première surface de serrage (2a),
    un deuxième élément de serrage (7f) avec une deuxième surface de serrage (7a) tournée vers la première surface de serrage (2a),
    dans lequel le premier élément de serrage (2) et le deuxième élément de serrage (7f) sont mobiles l'un par rapport à l'autre par l'intermédiaire d'un dispositif d'entraînement pour serrer ou desserrer une pièce (4) entre les surfaces de serrage (2a, 7a),
    dans lequel le premier élément de serrage (2) est fixé à un connecteur (10) présentant un premier filetage (10a) ou est formé d'une seule pièce avec celui-ci, et le deuxième élément de serrage (7) est monté à une section de palier (5), dans laquelle est monté de manière coulissant un élément tendeur (8) mobile par rapport à la section de palier (5), qui comprend un contre-filetage (10a) adapté au premier filetage (10a),
    dans lequel le connecteur (10) et l'élément tendeur (8) sont reliés entre eux par le filetage (10a) et le contre-filetage (8a), dans lequel le connecteur (10) comporte un premier dispositif anti-torsion amovible qui est conçu pour empêcher à l'état bloqué un mouvement relatif entre le connecteur (10) et l'élément tendeur (8) et pour permettre à l'état débloqué un tel mouvement relatif,
    caractérisé en ce
    que le premier dispositif anti-torsion comporte un élément de traction (3) qui est guidé à travers le connecteur (10).
  2. Dispositif de serrage (1) selon la revendication 1,
    caractérisé en ce
    qu'il comporte un cylindre (9), dans lequel l'élément tendeur (8) est guidé de manière coulissante sous la forme d'un piston.
  3. Dispositif de serrage (1) selon la revendication 2,
    caractérisé en ce
    que le cylindre (9) est mis en place de telle sorte que l'élément tendeur, (8) par la mise sous vide ou la montée en pression du cylindre (9), déplace la première surface de serrage (2a) vers la deuxième surface de serrage (7a).
  4. Dispositif de serrage (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que la direction axiale (Z) du filetage (10a) et du contre-filetage (8a) s'étend perpendiculairement aux surfaces de serrage (2a, 7a).
  5. Dispositif de serrage (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    qu'une torsion relative entre le connecteur (10) et l'élément tendeur (8) provoque une modification de la distance (h+d) entre les deux surfaces de serrage (2a, 7a).
  6. Dispositif de serrage (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce
    que l'élément de traction (3) est couplé, à l'extrémité opposée à la première surface de serrage (2a), à un contre-écrou (6) dont le filetage s'engage dans le contre-filetage (8a) de l'élément tendeur (8).
  7. Dispositif de serrage (1) selon la revendication 6,
    caractérisé en ce
    que l'élément de traction (3) est un vis de tension qui est couplé au contre-écrou (6) de manière rotative.
  8. Dispositif de serrage (1) selon l'une quelconque des revendications 6 ou 7,
    caractérisé en ce
    qu'entre le contre-écrou (6) et le connecteur (10) un deuxième dispositif anti-rotation (10b, 6b) est actif, qui empêche la torsion relative du contre-écrou (6) et le connecteur (10) et permet seulement leur déplacement axial.
  9. Dispositif de serrage (1) selon l'une quelconque des revendications 6 à 8,
    caractérisé en ce
    que le connecteur (10) et le contre-écrou (6) peuvent être serrés axialement l'un contre l'autre par appui par adhérence.
EP21211949.9A 2020-12-07 2021-12-02 Dispositif de serrage Active EP4008480B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020132390.5A DE102020132390A1 (de) 2020-12-07 2020-12-07 Spanneinrichtung

Publications (3)

Publication Number Publication Date
EP4008480A1 EP4008480A1 (fr) 2022-06-08
EP4008480B1 true EP4008480B1 (fr) 2024-02-07
EP4008480C0 EP4008480C0 (fr) 2024-02-07

Family

ID=78821531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21211949.9A Active EP4008480B1 (fr) 2020-12-07 2021-12-02 Dispositif de serrage

Country Status (3)

Country Link
EP (1) EP4008480B1 (fr)
DE (1) DE102020132390A1 (fr)
PL (1) PL4008480T3 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4620695A (en) 1984-08-28 1986-11-04 Davan Industries Power clamping apparatus
IT1320885B1 (it) 2000-02-22 2003-12-10 Biesse Spa Macchina per la lavorazione di pannelli di legno o similari
DE102011012739A1 (de) 2011-02-24 2012-08-30 Michael Weinig Ag Spanneinrichtung für Werkstücke aus Holz, Kunststoff und dergleichen
DE102014222423A1 (de) 2014-11-03 2016-05-04 Homag Holzbearbeitungssysteme Gmbh Spannvorrichtung
DE102018117011A1 (de) 2018-07-13 2020-01-16 Homag Gmbh Werkstückspanner, Bearbeitungsvorrichtung und Spannverfahren

Also Published As

Publication number Publication date
DE102020132390A1 (de) 2022-06-09
PL4008480T3 (pl) 2024-06-10
EP4008480A1 (fr) 2022-06-08
EP4008480C0 (fr) 2024-02-07

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