EP4008480A1 - Dispositif de serrage - Google Patents

Dispositif de serrage Download PDF

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Publication number
EP4008480A1
EP4008480A1 EP21211949.9A EP21211949A EP4008480A1 EP 4008480 A1 EP4008480 A1 EP 4008480A1 EP 21211949 A EP21211949 A EP 21211949A EP 4008480 A1 EP4008480 A1 EP 4008480A1
Authority
EP
European Patent Office
Prior art keywords
clamping
connecting piece
thread
clamping element
relative
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
EP21211949.9A
Other languages
German (de)
English (en)
Other versions
EP4008480B1 (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, in the clamped state, rests on opposite sides of the workpiece. 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. As a rule, this gap should be large enough to be able to insert a specific workpiece between the two clamping surfaces.
  • this approach also gives rise to problems in practice. After the workpiece has been placed between the two clamping surfaces, these must then be clamped.
  • this gap dimension known as the clamping stroke, which forms between one clamping surface and the workpiece in the released state, is to be dimensioned in such a way that, for example, a fingers 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.
  • EP 3 593 946 A1 describes a vertical clamp in which the one clamping surface can be moved towards the other clamping surface by means of a piston and a piston rod guided therein for clamping onto the other clamping surface.
  • the adjustment of the stroke can be read off a scale.
  • WO 2016/071351 A1 is known to realize different strokes by introducing stepped spacers, which are introduced together with the workpiece between the clamping surfaces.
  • the clamping stroke can only be set in discrete steps, since the spacer used has different steps.
  • a piston rod has to be moved manually within a guide.
  • the setting of a predefined clamping stroke is only possible with relative imprecision.
  • the clamping device according to the invention which can be designed in particular as a vertical clamp, can be used to clamp 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 each other for clamping or releasing a workpiece between the clamping surfaces via a drive device.
  • the first clamping element is fastened to a connecting piece having a first thread or is formed in one piece with the latter.
  • the second clamping element is mounted on a bearing section.
  • a clamping element that is movable relative to the bearing section is displaceably mounted in the bearing section.
  • the tensioning element has a mating thread that matches the first thread.
  • the clamping device thus enables a simple 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.
  • the first clamping element By turning the first clamping element, it can be displaced relative to the second clamping element, so that the position of the first clamping surface relative to the second clamping surface can be displaced. That's how he can desired clamping stroke can be continuously adjusted depending on the size of the workpiece.
  • the tensioning device according to the invention comprises a cylinder in which the tensioning element is displaceably guided in the form of a piston.
  • the piston can be displaced 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 traverse that evacuates the interior of the cylinder.
  • the interior of the cylinder can also be filled with a fluid in order to activate the tensioning device.
  • the axial direction of the thread and the mating 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 tensioning element only opens up the possibility that a relative adjustment of the clamping stroke is made possible. It is thus possible, for example, for a slight turning of the connecting piece relative to the clamping element to enable a relative axial displacement of the two clamping surfaces with respect to one another. The mutual twisting itself can therefore act to lock or cancel the distance between the two clamping surfaces.
  • the connecting piece has a detachable first anti-rotation device which is designed to prevent relative rotation between the connecting piece and the tensioning element in the locked state and to enable such relative rotation in the released state.
  • this anti-twist device ensures that, during normal operation of the clamping device, the clamping stroke is prevented from changing in an unintentional manner.
  • the pulling element can be tightened or loosened by hand by one person.
  • a preferred embodiment provides that the pulling element is coupled at the end facing away from the first clamping surface to a lock nut, the thread of which engages in the mating thread of the connecting piece.
  • the lock nut ensures that the connector cannot be turned any further than is absolutely necessary.
  • the lock nut and tension element are partially decoupled, so that the connecting piece can rotate relative to the tension element.
  • the tension element tightens the lock nut so that relative rotation between the connecting piece and the tension 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 that when locking the The tension screw pulls the lock nut against the connecting piece, thus blocking the relative rotation between the connecting piece and the tensioning element.
  • a second anti-twist device is effective according to a preferred embodiment of the invention between the named components, which prevents the relative turning of the lock nut and the connecting piece and only allows their axial displacement.
  • Such an anti-twist device can, for example, be designed in such a way that the counter nut and connecting piece engage in 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.
  • tongue and groove are attached to the lock nut or the connecting piece.
  • the clamping device 1 is preferably oriented 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 tensioning element 8 is provided for this relative movement, which is displaceable in the stroke direction Z relative to a bearing section 5 in which a plain bearing 5a for guiding the tensioning element 8 is located.
  • 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 the distance h plus a clamping stroke d apart for inserting or removing the workpiece.
  • the clamping stroke d If possible, do not reach the thickness of a human finger, so that it can be avoided that a finger can be pinched 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 therefore be adjusted.
  • the connecting piece 10 is provided with an external thread 10a which is screwed into a corresponding internal thread 8a of the tensioning element 8 .
  • the clamping element 8 itself is preferably designed as a piston, which is slidably mounted in a cylinder 9 in the direction of stroke Z.
  • the clamping element 8 can be moved in the stroke direction Z, for example by evacuating the cubic capacity 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.
  • ventilation of the cubic capacity of the cylinder 9 ensures that the tension is released.
  • it is also possible to move the clamping element in a different way for example to initiate the clamping process using compressed air and correspondingly release the clamping process by evacuation.
  • other drives are also fundamentally conceivable.
  • the clamping device according to the invention has a first Anti-twist device on. 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 ensures that the connection piece 10 and the lock nut 6 can no longer be twisted relative to the clamping element 8 when it rests against the connecting piece 10 in a non-positive manner.
  • This non-positive contact is produced via a clamping screw 3, which is passed through an opening 10c, which extends through the connecting piece 10 in the stroke direction Z.
  • This clamping screw 3 is connected to the lock nut 6 at its free end. If the clamping screw 3 is turned in a first direction, the lock nut 6 and the connecting piece 10 are braced against one another in the axial direction (parallel to Z) and relative rotation between the connecting piece 10 and the clamping element 8 is not possible. Correspondingly, when turning the clamping screw 3 in the opposite direction, the axial tension between the lock nut 6 and the connecting piece 10 is released and play is created, which allows the connecting piece 10 and the lock nut 6 to rotate relative to the clamping element 8 .
  • the lock nut 6 is also secured with a further anti-rotation 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.
  • the projection and recess could just as well be arranged on the respective other component. Since these two sections, the projection and the recess, engage in a form-fitting manner, there is a relative torsion between lock nut 6 and connecting piece 10 is no longer possible.
  • the turnbuckle 3 is then passed through the opening 10c in the connector 10. This opening is aligned with a threaded hole 6c, which is designed as an internal thread of the lock nut 6.
  • the clamping screw 3 engages in this threaded hole 6c.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Jigs For Machine Tools (AREA)
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 true EP4008480A1 (fr) 2022-06-08
EP4008480B1 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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118977120A (zh) * 2024-10-22 2024-11-19 成都和鸿科技股份有限公司 一种磨粒流去除榫槽毛刺加工夹具及方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023118806A1 (de) * 2023-07-17 2025-01-23 J.Schmalz Gmbh Spannvorrichtung sowie Spannsystem umfassend eine Spannvorrichtung und eine Konsole

Citations (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
DE10108134A1 (de) 2000-02-22 2001-09-06 Biesse Spa Maschine zum Bearbeiten von Tafeln aus Holz oder dergleichen
DE102011012739A1 (de) * 2011-02-24 2012-08-30 Michael Weinig Ag Spanneinrichtung für Werkstücke aus Holz, Kunststoff und dergleichen
WO2016071351A1 (fr) 2014-11-03 2016-05-12 Homag Holzbearbeitungssysteme Gmbh Dispositif de serrage
EP3593946A1 (fr) 2018-07-13 2020-01-15 HOMAG GmbH Dispositif de serrage de pièce, dispositif d'usinage et procédé de serrage

Patent Citations (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
DE10108134A1 (de) 2000-02-22 2001-09-06 Biesse Spa Maschine zum Bearbeiten von Tafeln aus Holz oder dergleichen
DE102011012739A1 (de) * 2011-02-24 2012-08-30 Michael Weinig Ag Spanneinrichtung für Werkstücke aus Holz, Kunststoff und dergleichen
WO2016071351A1 (fr) 2014-11-03 2016-05-12 Homag Holzbearbeitungssysteme Gmbh Dispositif de serrage
EP3593946A1 (fr) 2018-07-13 2020-01-15 HOMAG GmbH Dispositif de serrage de pièce, dispositif d'usinage et procédé de serrage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118977120A (zh) * 2024-10-22 2024-11-19 成都和鸿科技股份有限公司 一种磨粒流去除榫槽毛刺加工夹具及方法

Also Published As

Publication number Publication date
PL4008480T3 (pl) 2024-06-10
EP4008480B1 (fr) 2024-02-07
EP4008480C0 (fr) 2024-02-07
DE102020132390A1 (de) 2022-06-09

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