EP2047950B1 - Spannzwinge - Google Patents

Spannzwinge Download PDF

Info

Publication number
EP2047950B1
EP2047950B1 EP07020030A EP07020030A EP2047950B1 EP 2047950 B1 EP2047950 B1 EP 2047950B1 EP 07020030 A EP07020030 A EP 07020030A EP 07020030 A EP07020030 A EP 07020030A EP 2047950 B1 EP2047950 B1 EP 2047950B1
Authority
EP
European Patent Office
Prior art keywords
actuating arm
guide
lever
designed
clamp according
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.)
Not-in-force
Application number
EP07020030A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2047950A1 (de
Inventor
Frank Dipl.-Ing. Küfner
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.)
WESOBA WERKZEUG und SONDERMASCHB GmbH
Wesoba Werkzeug- und Sondermaschinenbau GmbH
Original Assignee
WESOBA WERKZEUG und SONDERMASCHB GmbH
Wesoba Werkzeug- und Sondermaschinenbau 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 WESOBA WERKZEUG und SONDERMASCHB GmbH, Wesoba Werkzeug- und Sondermaschinenbau GmbH filed Critical WESOBA WERKZEUG und SONDERMASCHB GmbH
Priority to PL07020030T priority Critical patent/PL2047950T3/pl
Priority to EP07020030A priority patent/EP2047950B1/de
Priority to AT07020030T priority patent/ATE545487T1/de
Publication of EP2047950A1 publication Critical patent/EP2047950A1/de
Application granted granted Critical
Publication of EP2047950B1 publication Critical patent/EP2047950B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25BTOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00Clamps
    • B25B5/06Arrangements for positively actuating jaws
    • B25B5/08Arrangements for positively actuating jaws using cams

Definitions

  • the invention relates to a clamp with 2 operating arms, which are moved by a positive control.
  • a clamp according to the introductory part of claim 1 is known from US 2,552,510 known.
  • Clamps are known. Simple forms of tension clamps provide a first and a second actuating arm, both of which are interconnected by a hinge and are moved towards each other at their front ends, the active parts. Such clamps use as joint a screw with clearance compensation by a spring arrangement on the screw, through which the low working path of the front ends of the actuating arms can be partially compensated. To be able to close such clamps quickly, according to a proposal in GB 701,464 an operating lever is used, which is articulated to the rear end of one of the actuating arms and has a cam plate for adjusting the distance.
  • a clamp is closed by spring force, while at least one actuating arm thereof can be opened with an actuating lever and molded cam.
  • Such type arrangements can only generate low pressing forces due to the spring force.
  • a clamp is to be designed so that the joints of the actuating arms can be adjusted by a screw to a predetermined distance and the actuating arms are otherwise angled at its rear end L-shaped. In the smaller distance can then be inserted from the back of this clamp a conical dome, which spreads the actuating arms, whereby the clamping opening closes.
  • a collet is material and maintenance-consuming.
  • a centering clamp may be designed to move the actuation arms simultaneously without pivotal movement by pin guides and a lever mechanism in the transverse and longitudinal directions.
  • the lever mechanism is susceptible to wear because of the large number of guide elements and bearings and thus the clamping clamp cost-in production and maintenance.
  • a proposal in DE 42 07 113 A1 relates to a clamp, which is to be carried out so that the actuating arms are connected to one another at one end and at the other end the necessary transverse movement of the ends is realized by a disc with curved paths.
  • the central clamping range of such an arrangement is extremely small, whereby at the same time the field of application of this clamp is significantly limited.
  • the construction of this clamp also allows the insertion of workpieces only in the direction of the vertical axis.
  • a tension clamp with adjustable screw as hinge is turn in US 3,986,746 proposed, wherein the symmetrically arranged actuating arms are spread at their rear ends by a conical component in conjunction with a compression spring and thus the voltage is generated.
  • the conical component To release such a clamp, the conical component must be moved against the spring force, which is extremely difficult at least when operated by hand.
  • a clamp according to US 2,552,519 has 2 pivotally mounted levers, which are held with a compression spring in the open position.
  • a cam disc which acts on the rear ends of the lever, a closing of the clamp is possible, the control element also provides 2 end positions for the cam.
  • An asymmetrically working clamp is in DE 195 44 548 A1 described.
  • a movable lever is moved relative to the fixed lever, wherein the movement is transmitted via a cam with a spiral cutout on a short rear lever arm of the movable lever. This requires the cam disc to be rotated 90 degrees to the clamp.
  • the clamp is to be designed so that both actuating arms are mounted on the base assembly in pivot bearings and the storage points are located on the actuating arms approximately in the central region.
  • a control member On the base member, a control member is arranged, which is rotatably mounted relative to this.
  • the rear ends of the actuating arms extend to the height of the axis of rotation of the control member.
  • the operating arms have at the rear ends elements with which they interact with guides in the control organ.
  • the elements of the actuating arms and the guides in the control member cooperate with each other so that any movement of the control member forcibly produces a pivoting of the actuating arms.
  • a positive connection at least approximately in the transverse direction of the actuating arms.
  • the elements at the rear ends of the actuator arms and the guides in the controller may be designed to be self-locking when needed, that is, to hold the set tension without additional effort.
  • control member into the base member or members connected to the base member such that it is in a recess thereof is guided.
  • a disc shape of the guide member is advantageous.
  • the base member may be plate-shaped or disc-shaped. Likewise, it may consist of two spaced-apart plates, made of a unitary material running component, which may also be designed as a housing or from a multi-part housing, which is assembled together exist.
  • the actuating arms are in the simplest embodiment rectilinearly extending levers, which are designed in the region of the pivot bearings and at the rear ends according to the features of the invention.
  • elements such as clamping jaws, are arranged, with largely universally applicable embodiments are provided at the front ends with corresponding mounting holes.
  • the actuating arms may have a round, rectangular or any other cross section. Furthermore, they can be designed as an angle lever or Z-shaped. This makes it possible to adapt the clamp according to the invention to a variety of tasks in terms of the span and the display and the transferable clamping forces. It can be varied in a wide range.
  • the storage can also be significantly off-center. Nevertheless, it is ensured that move the front and the rear ends of the actuating arms during pivoting on a circular path. Depending on the distance of the bearings on the base member and the lever lengths of the actuating arms, a more or less large pivoting angle of the actuating arms can be achieved before they touch each other with the respective ends. This results in a large clamping range, which is given even with a reduction by additionally arranged components (clamping jaws).
  • the guide members are pin-shaped in their simplest embodiment, can additionally carry a roller, a sliding block or a bearing. The choice of the most suitable Guide components depends on the task of the clamp to be executed.
  • the guides are designed in such a way that, in cooperation with the guide components, they fulfill the main task of the guide member, namely to change the distance I between the two rear ends of the actuating arms.
  • the guides can be rectilinear, arcuate, spiral, elliptical or a freely selected shape accordingly.
  • the management organ takes up the guides. These may be formed in the form of grooves, apertures or surveys.
  • the guide member will be plate or disc-shaped. It may also be made of similar or similar and spaced-apart discs.
  • actuate the guide member may be arranged on the circumference of a lever.
  • an electromechanical or fluidly operating drive can be used, whereby both linear-acting and angle-adjusting units can be used.
  • the actuating arms can also be designed in one or more parts. Also as a multi-part design with spaced from each other, similar parts that can be connected by spacers. The same applies to one-piece operating arms, which are grooved, for example, by subsequent processing.
  • a base component (1) has a first bearing (3) and a second bearing (4) approximately equidistant from its axis of symmetry (2).
  • a first actuating arm (5) and in the second bearing (4) a second actuating arm (6) is pivotally mounted.
  • At the front end (7) of the first (5) and at the front end (9) of the second actuating arm (6) are any functional parts for execution a clamping task can also be arranged.
  • the actuating arms (5) and (6) without additional components for clamping can be brought up.
  • a guide member (12) is arranged, which engages in a guide (13).
  • the rear end (14) of the second actuating arm (6) is also provided with a guide member (15) running in a guide (16).
  • the guides (13) and (16) are part of a guide member (17) which is pivotally connected to the base member (1) in the bearing (18). A pivoting of the guide member (17) causes a change in position of the rear ends (11) and (14) in the guides (13) and (16). The first (5) and the second actuating arm (6) are thereby pivoted.
  • the guides can be designed in any geometry.
  • the guide member (17) is set in motion by a lever (19) fixedly connected thereto or by drives of the same effect.
  • the clamp according to the invention is designed so that a base member (20) receives a guide member (21) and in a recess (22) a lever (23) runs.
  • the first (24) and the second actuating arm (25) are pivotally mounted in joints (26) and (27).
  • the rear levers (28) are slotted and receive in the slots (29) on the base member (20).
  • the guide member (21) has helical recesses (30) and (31) which engage in the pins (32) and (33). By pressing the lever (23), the guide member (21) is rotated and over the pins (32) and (33) the actuating arms (24) and (25) rotated.
  • the actuating arms (24) and (25) have at their front ends elements (33) which can serve to accommodate adapted clamping elements.
  • an extension (34) is provided, which on the one hand can limit the pivoting angle of the actuating arms (24) and (25), on the other hand serve to receive and fix additional components or the attachment of the clamp to a device. Likewise, this is possible with the pin (35).
  • Fig. 2 and Fig. 3 Not shown rest index be integrated, whose index corresponds to a depression in the circumference of the guide member (21).
  • the invention thus has the advantage that with few items a clamp with a very large clamping range can be constructed, which also can be self-locking and makes it possible to perform with manual or mechanical operation clamping operations to integrate the clamp in larger facilities and on this Way to solve even complex clamping tasks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Wire Bonding (AREA)
  • Jigs For Machine Tools (AREA)
EP07020030A 2007-10-12 2007-10-12 Spannzwinge Not-in-force EP2047950B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL07020030T PL2047950T3 (pl) 2007-10-12 2007-10-12 Ścisk mocujący
EP07020030A EP2047950B1 (de) 2007-10-12 2007-10-12 Spannzwinge
AT07020030T ATE545487T1 (de) 2007-10-12 2007-10-12 Spannzwinge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07020030A EP2047950B1 (de) 2007-10-12 2007-10-12 Spannzwinge

Publications (2)

Publication Number Publication Date
EP2047950A1 EP2047950A1 (de) 2009-04-15
EP2047950B1 true EP2047950B1 (de) 2012-02-15

Family

ID=39103497

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07020030A Not-in-force EP2047950B1 (de) 2007-10-12 2007-10-12 Spannzwinge

Country Status (3)

Country Link
EP (1) EP2047950B1 (pl)
AT (1) ATE545487T1 (pl)
PL (1) PL2047950T3 (pl)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2552519A (en) 1949-11-14 1951-05-15 Louis C Clair Board tightening tool
GB701464A (en) 1951-08-07 1953-12-23 Crane Ltd Clamp tool for assembling radiator sections or the like
NL241337A (pl) 1959-07-16
US3744838A (en) 1972-01-28 1973-07-10 R Jackson Friction clamp
US3986746A (en) 1975-09-23 1976-10-19 Guy-Chart Tools Limited Clamp
US4369956A (en) 1980-11-17 1983-01-25 Aronson Orvil R Self-centering fixture
US4836707A (en) 1987-09-04 1989-06-06 The United States Of America As Represented By The United States National Aeronautics And Space Administration Releasable clamping apparatus
DE4207113C2 (de) 1991-03-12 1994-11-24 Reika Werk Gmbh Maschf Vorrichtung zum Positionieren und Halten von Werkstücken
US5244195A (en) 1992-11-16 1993-09-14 At&T Bell Laboratories Clamping fixture
DE19544548C2 (de) 1995-11-29 2002-02-07 Meyer Keller Noe Schalttech Spannzwinge für Schalungselemente
US5960689A (en) 1998-10-27 1999-10-05 Warren Metallurgical Inc. Bar puller
US6832416B2 (en) 2003-05-02 2004-12-21 The Boeing Company Cam actuated sidewall retainer clamp
ITMI20050436A1 (it) 2005-03-17 2006-09-18 Univer Spa Dispositivo di bloccaggio e centratura per pezzi da lavorare con organo di bloccaggio a forma di gancio

Also Published As

Publication number Publication date
EP2047950A1 (de) 2009-04-15
ATE545487T1 (de) 2012-03-15
PL2047950T3 (pl) 2012-07-31

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