EP2626174A1 - Klemmvorrichtung zum Klemmen von Werkstücken, insbesondere Blättern - Google Patents

Klemmvorrichtung zum Klemmen von Werkstücken, insbesondere Blättern Download PDF

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Publication number
EP2626174A1
EP2626174A1 EP13000593.7A EP13000593A EP2626174A1 EP 2626174 A1 EP2626174 A1 EP 2626174A1 EP 13000593 A EP13000593 A EP 13000593A EP 2626174 A1 EP2626174 A1 EP 2626174A1
Authority
EP
European Patent Office
Prior art keywords
hook member
clamping
plane
support
clamping apparatus
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
EP13000593.7A
Other languages
English (en)
French (fr)
Other versions
EP2626174B1 (de
Inventor
Umberto Conte
Ener Varetto
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.)
VEP Automation Srl
Original Assignee
VEP Automation Srl
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 VEP Automation Srl filed Critical VEP Automation Srl
Publication of EP2626174A1 publication Critical patent/EP2626174A1/de
Application granted granted Critical
Publication of EP2626174B1 publication Critical patent/EP2626174B1/de
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
    • B25B5/12—Arrangements for positively actuating jaws using toggle links
    • B25B5/122—Arrangements for positively actuating jaws using toggle links 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
    • B25B5/06—Arrangements for positively actuating jaws
    • B25B5/061—Arrangements for positively actuating jaws with fluid drive
    • B25B5/064—Arrangements for positively actuating jaws with fluid drive with clamping means pivoting around an axis perpendicular to the pressing direction

Definitions

  • the present invention generally refers to apparatuses for clamping workpieces, particularly sheets, which allow a workpiece to be held in a predetermined position by clamping it at a side edge thereof or at the edge of a hole bored in it, in order that a machining operation, such as welding, bending or similar, can be performed on it.
  • the invention relates to an apparatus of the type defined in the preamble of appended claim 1.
  • An apparatus of this type known from DE-63 29 393 or from EP-1 393 861 , allows to clamp a sheet-shaped workpiece that has only a predetermined thickness.
  • the present invention aims at providing an apparatus of the type defined above that is able to clamp workpieces of different thickness, at least within a predefined range of thicknesses.
  • the apparatus comprises elastic thrust means adapted to cooperate with control means for controlling its hook member in order to allow the hook member, in its clamping position, to reach a plurality of positions close within a predetermined range to a plane of support, with the aim of clamping selectively, with respect to the body, workpieces of different thickness
  • the apparatus of the invention turns out to be very versatile since it can be used for machining workpieces of different thickness without requiring any adjustment of its geometrical characteristics.
  • the elastic means consist of a spring the axis of which is arranged transverse to the axis of the control rod, which spring is adapted to apply an axial force to a connecting rod of the control means.
  • the structure of the apparatus of the invention is structurally simple, and therefore also reliable in use.
  • said spring is a gas spring that includes a substantially cylindrical body fixed to the body of the apparatus, and a piston slidably mounted with respect to the cylindrical body, having a head surface intended to rest against the radially outer surface of a rotatable roller associated with the end of the connecting rod that faces the side opposite to a L-shaped lever of the control means.
  • the apparatus can be made particularly compact, to all advantage of the convenience and versatility of installation, and it is characterized by a great strength, so that it turns out to be suitable for heavy duty applications that involve a very high number of cycles of operation, without requiring any substantial maintenance.
  • an apparatus according to the invention for clamping workpieces, such as sheets, is indicated 10 as a whole.
  • the apparatus 10 comprises a body 12 provided on its upper part (with reference to the position of the apparatus shown in the figures) with a stationary plate 14 that defines a flat surface 16 intended to allow a workpiece S ( Figure 5 ) to be clamped by the apparatus 10, to be supported.
  • the body 12 is usually formed by two half-shells coupled to each other (only one of which is shown in the figures), which delimit an internal cavity of the body 12.
  • a relatively wide window 18 is formed in the plate 14, through which an upper loop end 22 of a hook member 20 extends beyond the surface 16, the hook member 20 having a lower elongated portion 24 arranged inside the cavity of the body 12.
  • the elongated portion 24 is connected, as it will be described in a greater detail below, to control means adapted to control the movement of the hook member 20 between a resting position, in which its loop portion 22 is spaced from the surface 16, and a plurality of clamping positions, in which the loop end 22 is arranged close to the surface 16.
  • a centering pin 26 is connected to the stationary plate 14, which pin protrudes perpendicularly above the surface 16 and has an axial through cavity in which the upper portion of the body 20, in particular its loop end 22, is arranged with a clearance, in order that it can move freely.
  • the pin 26 can be used to engage a reference hole bored in the workpiece to be clamped by the apparatus 10.
  • control means for controlling the movement of the hook member 20 comprise a control rod 28 axially and slidably mounted between two opposite end-of-stroke positions as a result of the movement of a piston 30, typically pneumatic, that is fixed to one end of the rod 28 and moves sealingly in the chamber of a cylinder 32 associated below the body 12, owing to the feeding of fluid in the cylinder 32 in such a manner to apply selectively a pressure to the opposite faces of the piston 30.
  • the upper end of the rod 28, on the side opposite to the piston 30, is fork-shaped and has a pair of parallel branches 34 between which a recess 36 is defined.
  • Respective slots 38 ( Figure 5 ) are formed in both the branches 34, which extend transversely to the axis of the rod 28 and are slidably engaged by the opposite ends of a shaft 40.
  • a rotatable roller 42 is mounted on the shaft 40, preferably with the interposition of a roller bearing 41, which is received in the recess 36 and that will be referred in more detail below.
  • a first fork-shaped end 43 of a connecting rod 44 is pivoted on the shaft 40, while the second end of the connecting rod 44 is articulated about a pin 46 parallel to the shaft 40, which pin is engaged in respective holes 47 formed at the ends of first arms 48 of a pair of L-shaped levers 52 equal to each other.
  • Each lever 52 has a second arm 50, transverse to the respective arm 48, articulated through another pin 56 parallel to the pin 46, both at respective holes 58 formed at the free end of the arms 50, and in a through hole 59 formed in an intermediate zone of the elongated portion 24 of the hook member 20.
  • the pair of levers 52 is swingably mounted about a pivot pin 54 that is connected, at its opposite ends, to the two half-shells of the body 12, and that crosses both the levers 52 at respective through holes formed in an angular central portion thereof from which the arms 48 and 50 extend.
  • another hole 60 is formed in the elongated portion 24 of the hook member 20, at the side opposite to the loop portion 22 with respect to the hole 59, which is crossed by another pin 62 the opposite ends of which are provided with respective rolling bearings (not shown) slidably mounted in respective arched slits 64 formed in the two half-shells of the body 12, in order to guide the movement of the hook member 20 in such a manner that its movement is always parallel to itself.
  • the control means for controlling the movement of the hook member 20, in particular the rod 28, the connecting rod 44 and the L-shaped lever 52, together with the relevant pins of rotation, constitute a toggle mechanism that has the function of making irreversible the clamping position of the hook member 20 with respect to movements.
  • Elastic thrust means are associated with the body 12 in order to allow the coupling body 20, in its clamping position, to assume a plurality of positions, within a predetermined range, that are close to the support surface 16 with the aim of allowing workpieces S of different thickness to be clamped with respect to the body 12.
  • Such elastic means are intended to cooperate with the aforesaid control means and consist preferably of a gas spring 66, typically loaded with nitrogen, arranged with its own axis transverse to the axis of the rod 28, in order to apply an axial thrust to the connecting rod 44 when the hook member 20 is in its clamping position.
  • a gas spring 66 typically loaded with nitrogen
  • the spring 66 comprises a cylindrical body 68 fixed in a corresponding seat formed on one side of the body 12 by a removable casing 70, on the one hand, and by means of a tooth-shaped abutment member 78, on the other side, that projects below the stationary plate 14.
  • the casing 70 is generally cup-shaped so as to receive a portion of the body 68 of the spring 66, and its outer surface is so shaped as to define, together with a side cavity 72 of the body 12, a rear fastening seat 74 in order to allow the apparatus 10 to be assembled on a support member (not shown), as an alternative to the assembly at a front coupling seat 76 formed in the body 12 at the side opposite to the seat 74.
  • a piston 80 is slidably mounted in the cylindrical body 68 of the spring 66, which piston has an head surface intended to bear against the radially outer surface of the roller 42 in order to apply an elastic compressive force to the connecting rod 44, in consideration of the sliding of the shaft 40 in the slots 38 of the fork end of the control rod 28.
  • a shield plate 82 is mounted between the stationary plate 14 and the body 12 of the apparatus, which is crossed by the coupling member 20 and which can translate with respect to the body 12 in a direction parallel to the plate 14 as a result of the movement of the member 20, in order to keep the opening 18 of the plate 14 substantially closed, so as to prevent foreign bodies from penetrating into the body cavity 12 through the opening 18.
  • Guide means for guiding the movement of the plate 82 are provided to enable translation of the shield plate 82 as a result of the movement of the hook member 20, which guide means consist of a pair of coaxial auxiliary pins 84 projecting from opposite portions of the plate 82 that face the coupling body 20, and engage respective rectilinear guide grooves 86 (only one of which is shown in Figures 2 , 4 and 5 ) formed on opposite sides of the hook member 20.
  • the hook member 20 In operation of the apparatus 10, the hook member 20 is initially in its resting position shown in Figures 1 and 2 , in which the loop end 22 thereof is entirely contained in the axial cavity of the centering pin 26. In this position, that corresponds to the lowered configuration of the control rod 28, the engagement member 20 is raised with respect to the flat surface 16 of the stationary plate 14, and it is retracted from the window 18, while the shield plate 82 is in its retracted configuration closer to the gas spring 66.
  • the end loop 22 of the hook member 20 reaches its clamping position of a workpiece S that rests on the surface 16, in which it projects forward with respect to the cavity of the centering pin 26, that is lowered toward the surface 16 of the stationary plate 14 and is advanced in the direction opposite to the gas spring 66.
  • the shield plate 82 is brought into a forward position with respect to the body 12, so as to close the window 18 of the stationary plate 14.
  • the hook member 20 can assume a number of different clamping positions, the extreme positions of which are respectively illustrated in solid and dotted lines in Figure 5 .
  • the apparatus 10 of the invention automatically adjusts to clamping workpieces or sheet S having a different thickness generally comprised between about 7 and 10 mm, while maintaining a high clamping force on the workpiece S and by keeping the irreversible locking effect towards the movement of the hook member 20 unchanged, obtained by means of the toggle mechanism.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Packaging For Recording Disks (AREA)
  • Packaging Of Special Articles (AREA)
  • Wrappers (AREA)
EP13000593.7A 2012-02-08 2013-02-06 Klemmvorrichtung zum Klemmen von Werkstücken, insbesondere Blättern Active EP2626174B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000106A ITTO20120106A1 (it) 2012-02-08 2012-02-08 Apparecchiatura di bloccaggio di pezzi, particolarmente di fogli di lamiera

Publications (2)

Publication Number Publication Date
EP2626174A1 true EP2626174A1 (de) 2013-08-14
EP2626174B1 EP2626174B1 (de) 2015-07-01

Family

ID=46001450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13000593.7A Active EP2626174B1 (de) 2012-02-08 2013-02-06 Klemmvorrichtung zum Klemmen von Werkstücken, insbesondere Blättern

Country Status (2)

Country Link
EP (1) EP2626174B1 (de)
IT (1) ITTO20120106A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015008208U1 (de) 2015-12-01 2016-01-11 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Druckmittelbetätigbare kombinierte Zentrier- und Spannvorrichtung für blechförmige Bauteile, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
DE102015006019B3 (de) * 2015-05-13 2016-06-02 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Unterbauspanner mit in sich gefedertem Gelenkparallelogramm
EP3061568A1 (de) 2015-02-26 2016-08-31 UNIVER S.p.A. Spannvorrichtung zum Spannen von Werkstücken unterschiedlicher Stärke
DE102016200180A1 (de) * 2016-01-11 2017-08-17 Volkswagen Aktiengesellschaft Einstellbare Spannvorrichtung zur Aufnahme von flächigen Werkstücken
CN107470824A (zh) * 2017-08-11 2017-12-15 昆山群发机械设备有限公司 夹紧器及其控制方法
DE102016015041A1 (de) 2016-06-20 2017-12-21 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Spreiz- und Ziehdorn, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
EP3542963A1 (de) * 2018-03-22 2019-09-25 MAGNA STEYR Fahrzeugtechnik AG & Co KG Hackenspanner
WO2020071301A1 (en) * 2018-10-05 2020-04-09 Smc Corporation Clamping device
IT202100010481A1 (it) 2021-04-26 2022-10-26 Vep Automation Srl Dispositivo di centraggio e di ritegno a gancio per centrare e trattenere senza gioco un elemento, particolarmente di carrozzeria

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341155A1 (de) * 1988-05-06 1989-11-08 Genus International Spannvorrichtung, um Platten oder Profilstähle gegeneinander zu spannen
EP0370914A1 (de) * 1988-11-25 1990-05-30 POLYMATIC Société Anonyme dite: Spannkopf mit Spielausgleich
DE3936396C1 (en) 1989-11-02 1991-04-25 Josef Gerhard 4030 Ratingen De Tuenkers Toggle tightening device - has housing containing toggle with piston and cylinder, and right angled two armed lever pivoted at other end
DE19751950C1 (de) * 1997-11-24 1999-03-04 Isi International Sa Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
EP1391266A2 (de) * 2002-08-23 2004-02-25 DE-STA-CO Metallerzeugnisse GmbH Zentrierspanner
EP1393861A2 (de) 2002-09-02 2004-03-03 Luciano Migliori Werkstück-Spannvorrichtung mit Schabelement
EP2196286A2 (de) * 2008-12-09 2010-06-16 VEP Automation S.r.l. Spannvorrichtung mit hakenförmigem Spannstück

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0341155A1 (de) * 1988-05-06 1989-11-08 Genus International Spannvorrichtung, um Platten oder Profilstähle gegeneinander zu spannen
EP0370914A1 (de) * 1988-11-25 1990-05-30 POLYMATIC Société Anonyme dite: Spannkopf mit Spielausgleich
DE3936396C1 (en) 1989-11-02 1991-04-25 Josef Gerhard 4030 Ratingen De Tuenkers Toggle tightening device - has housing containing toggle with piston and cylinder, and right angled two armed lever pivoted at other end
DE19751950C1 (de) * 1997-11-24 1999-03-04 Isi International Sa Kniehebelspannvorrichtung, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
EP1391266A2 (de) * 2002-08-23 2004-02-25 DE-STA-CO Metallerzeugnisse GmbH Zentrierspanner
EP1393861A2 (de) 2002-09-02 2004-03-03 Luciano Migliori Werkstück-Spannvorrichtung mit Schabelement
EP2196286A2 (de) * 2008-12-09 2010-06-16 VEP Automation S.r.l. Spannvorrichtung mit hakenförmigem Spannstück

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3061568A1 (de) 2015-02-26 2016-08-31 UNIVER S.p.A. Spannvorrichtung zum Spannen von Werkstücken unterschiedlicher Stärke
DE102015006019B3 (de) * 2015-05-13 2016-06-02 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Unterbauspanner mit in sich gefedertem Gelenkparallelogramm
EP3095558A1 (de) 2015-05-13 2016-11-23 Olaf Und Andre Tünkers GBR Unterbauspanner mit in sich gefedertem gelenkparallelogramm
DE202015008208U1 (de) 2015-12-01 2016-01-11 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Druckmittelbetätigbare kombinierte Zentrier- und Spannvorrichtung für blechförmige Bauteile, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
DE102016200180A8 (de) * 2016-01-11 2018-02-22 Volkswagen Aktiengesellschaft Einstellbare Spannvorrichtung zur Aufnahme von flächigen Werkstücken
DE102016200180A1 (de) * 2016-01-11 2017-08-17 Volkswagen Aktiengesellschaft Einstellbare Spannvorrichtung zur Aufnahme von flächigen Werkstücken
DE102016015041B4 (de) 2016-06-20 2018-06-14 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Spreiz- und Ziehdorn zum Zentrieren und Spannen von blechförmigen Bauteilen mit zwei koaxial zueinander geführten Kolben
DE102016015041A1 (de) 2016-06-20 2017-12-21 Olaf Und André Tünkers Gbr (Vertretungsberechtigter Gesellschafter: Dipl.-Ing. Olaf Tünkers, 40885 Ratingen) Spreiz- und Ziehdorn, insbesondere zur Verwendung im Karosseriebau der Kfz-Industrie
CN107470824A (zh) * 2017-08-11 2017-12-15 昆山群发机械设备有限公司 夹紧器及其控制方法
EP3542963A1 (de) * 2018-03-22 2019-09-25 MAGNA STEYR Fahrzeugtechnik AG & Co KG Hackenspanner
CN110293490A (zh) * 2018-03-22 2019-10-01 马格纳斯泰尔汽车技术两合公司 钩张紧器
US11135701B2 (en) 2018-03-22 2021-10-05 Magna Steyr Fahrzeugtechnik Ag & Co Kg Hook tensioner
CN110293490B (zh) * 2018-03-22 2021-11-16 马格纳斯泰尔汽车技术两合公司 钩张紧器
WO2020071301A1 (en) * 2018-10-05 2020-04-09 Smc Corporation Clamping device
IT202100010481A1 (it) 2021-04-26 2022-10-26 Vep Automation Srl Dispositivo di centraggio e di ritegno a gancio per centrare e trattenere senza gioco un elemento, particolarmente di carrozzeria
EP4082720A1 (de) 2021-04-26 2022-11-02 VEP Automation S.r.l. Hakenzentrier- und -haltevorrichtung zum spielfreien zentrieren und halten eines teiles, insbesondere eines karosserieteils

Also Published As

Publication number Publication date
ITTO20120106A1 (it) 2013-08-09
EP2626174B1 (de) 2015-07-01

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