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WO1979001157A1 - Bridage a genouillere - Google Patents

Bridage a genouillere Download PDF

Info

Publication number
WO1979001157A1
WO1979001157A1 PCT/GB1979/000082 GB7900082W WO7901157A1 WO 1979001157 A1 WO1979001157 A1 WO 1979001157A1 GB 7900082 W GB7900082 W GB 7900082W WO 7901157 A1 WO7901157 A1 WO 7901157A1
Authority
WO
WIPO (PCT)
Prior art keywords
clamp
toggle
bar
support means
clamping
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.)
Ceased
Application number
PCT/GB1979/000082
Other languages
English (en)
Inventor
G Chopin
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1979001157A1 publication Critical patent/WO1979001157A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/02—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening
    • F16B2/18—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using cams, levers, eccentrics, or toggles
    • F16B2/185—Clamps, i.e. with gripping action effected by positive means other than the inherent resistance to deformation of the material of the fastening using cams, levers, eccentrics, or toggles using levers
    • 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

Definitions

  • This invention relates to clamps and in particular to clamps operated via toggle linkages.
  • Industrial clamps usually comprise a clamping bar having a clamping head at one end which is used to bear down upon a work piece to securely hold it in position.
  • the other end of the clamp bar is usually pivoted about a fulcrum pin and a downward force is applied between the fulcrum pin and the clamping head to pivot the clamping bar down into its clamped position.
  • Toggle mechanisms are frequently used to effect this motion, but since the toggle pressure is applied downwardly between the fulcrum of the clamp bar and its operating head there is inevitably wastage of the applied pressure on the fulcrum pin. If the fulcrum pin is placed intermediate the toggle mechanism and the clamping head the downward clamping force at the head requires a toggle mechanism that provides an upward acting force. This requirement has limited the use of intermediate fulcrum pins mainly to clamps using an opposed-links toggle; so if a differential links toggle clamp is required this has usually entailed using a bell-cranked clamping bar with its limited leverage for a given height and utility.
  • a toggle clamp comprising support means, a clamping member or bar, an operating arm and first and second link elements of a differential toggle mechanism; the first and second link elements being pivotally connected at respective first ends thereof, the second end of the first link element being pivotally connected to one end of the clamping member, so that the effective length of the first link element is shorter than that provided by the second link element; said second link element, being in tension, is pivotally secured from its second end to the support means, in juxtaposition with the first link element during clamping, the clamping member, in use being pivotable about a fulcrum element intermediate said one end of the clamping, member and the effective clamping end thereof; and the operating arm being connected to said shorter link element so that, in use, the operating arm may be operated to effect pivotal movement of the clamping member about said fulcrum element.
  • Figure 1 is a side elevation of a manually operated horizontal clamp assembly shown partly unclamped
  • Figure 2 is a side elevation of a clamp assembly in a closed position
  • Figure 3 is a scrap view on the arrow of Figure 1 showing typical base fixing slots.
  • the clamp assembly comprises a clamp body 1 in the form of an inverted T-section.
  • the clamp body 1 supports a toggle linkage which comprises a pair of parallel links 2 on each side of the web of the clamp body; the links 2 being connected and attached to the clamp body 1 by a pivot pin 3.
  • the free ends of the links 2 are connected to respective shorter links 4 by a common pivot pin 5 extending through all four links.
  • the links 4 each have a generally coplanar handle portion 6 extending at right angles to the ends of the links 4 remote from their pivoted connection with the links 2.
  • Each of the handle portions 6 is formed integrally with its associated link 4 to form a bell-cranked handle therewith.
  • Each of the links 4 at their ends adjacent to a bifurcated clamp bar 8 is pivotally connected by respective pivot pin 7 to the end of one arm of the clamp bar 8.
  • the bifurcated arms of the clamp bar 8 are curved towards one another and are connected at their ends 9 to form the operative head of the clamping mechanism.
  • a fulcrum pin 10 which is fixed to and extends between the two arms of the clamping bar 8.
  • the frontward facing surface of the clamp body 1 includes a slot 11 extending horizontally across, and opening out towards the frontward facing surface of the clamp body 1.
  • the lower surface inside the slot extends upwardly from the front surface of the clamp body and at its inner end is shaped to snuggly receive the fulcrum pin 10.
  • the depth of the slot 11 and the position of the fulcrum pin 10 on the clamp bar 8 are such that when the links 4 and 2 are disposed vertically overlapping one another, as in Figure 2, the clamping bar is disposed horizontally and the fulcrum pin 10 is received at the base of the slot 11.
  • An angled screw 12 is received in a corresponding tapped hole 13 in the rearward facing surface of the clamp body 1.
  • This screw projects from the rearward facing surface of the body 1 to provide an abutment surface for the pivot pin 5.
  • the screw 12 may be adjusted to ensure a correct amount of 'over-run' on linkage as shown in Figure 2; the use of a lock-nut (not shown) to maintain adjustment is optional.
  • the clamp is secured to tools or fixtures by means of forward facing slots 14 in the base portion of the clamp body 1. These slots may be made in the form of key hole slots if desired.
  • the forward facing part of the base of the clamp body 1 adjacent the slots is chamfered, as at 15, to facilitate the sliding of the clamp base under bolt head/s.
  • a positioning pin or dowel (not shown) is located in a hole 16 in the base of the clamp body to provide means for accurately realigning the clamp if for any reason it is required to move the clamp.
  • FIG. 1 the clamp is shown in a partially released position in which the clamp bar 8 is being moved upwardly away from its horizontal clamping position. This movement is produced by pushing the handle 6 upwardly in an arc so that the pivot pin 5 is forced rearwardly and allowing the pivot pin 7 to move nearer towards the base of the slot 11 so that the fulcrum pin 10 can slide downwardly out of the slot 11.
  • the handle portion 6 is now moved downwardly in an arc by an operator with the result that the pivot pin 5 is moved inwardly and the pivot pin 7 is moved upwardly applying an upward force at the rear ends of the clamping bar 8 resulting from the differential-link toggle mechanism at rear ends of said bar, making available a similar downward force at the clamping head 9 of said bar which will now have attained the horizontal clamped position shown in Figure 2, with little or no force having been wasted on the intermediately positioned fulcrum pin 10.
  • clamp body 1 and clamp bar 8 can be varied to suit component requirements without increasing overall height of clamp unduly while clamp body 1 can have forms other than the T-section of drawings with its sloping ends by using angles/channels of rolled, bent plate, cast or forged shape and the like or even be limited to a flat plate fixed in situ on tools.
  • the fulcrum slot 11 can revert to a hole if facility for rearward lifting of clamp bar 8 is not required and in fact would necessarily have to be a hole if a pneumatic or hydraulic actuator is used instead of a clamp arm manually operated, said actuator would act upon the short links 4 of toggle or upon an extension thereof in line with pivot pins 5 and 7 centre line or at any angle thereto.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jigs For Machine Tools (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Abstract

Les chainages a genouillere differentielle a tiges d'assemblage juxtaposees utilisees jusqu'a present dans les bridages industriels appliquent habituellement une pression articulee sur une barre de bridage droite qui decompose la pression entre un axe pivot et l'extremite de bridage de ladite barre ou bien ils utilisent une barre de bridage coudee avec des bras fixes sur la hauteur de la bride et ayant la tige d'assemblage courte et la poignee fixee de maniere pivotante sur le corps de bridage. Cette invention concerne un bridage a genouillere ayant un chainage a genouillere differentiel a tiges d'assemblage juxtaposees pour actionner l'extremite proche de la barre de bridage adjacente (8), ladite barre (8) ayant un element a pivot (10) entre ledit chainage et l'extremite de bridage distante (9) de ladite barre avec, sur les brides a fonctionnement manuel, la possibilite d'utiliser des fentes a deblocage/retenue rapide (11) pour l'element a pivot (10) et une barre de bridage plus des fentes (14) de bridage pour le serrage/desserrage rapide de la bride.
PCT/GB1979/000082 1978-05-31 1979-05-25 Bridage a genouillere Ceased WO1979001157A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2606378 1978-05-31
GB26063/78 1978-05-31

Publications (1)

Publication Number Publication Date
WO1979001157A1 true WO1979001157A1 (fr) 1979-12-27

Family

ID=10237785

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1979/000082 Ceased WO1979001157A1 (fr) 1978-05-31 1979-05-25 Bridage a genouillere

Country Status (2)

Country Link
EP (1) EP0015995A1 (fr)
WO (1) WO1979001157A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417667U1 (de) * 1994-11-08 1995-01-05 DE-STA-CO Metallerzeugnisse GmbH, 61449 Steinbach Spannvorrichtung
EP0891838A1 (fr) * 1997-07-18 1999-01-20 Simpro S.p.A. Système de serrage de pièces d'assemblage, en particulier parties en tÔle à souder
US6817603B2 (en) 1999-02-17 2004-11-16 Danpres A/S Clamping tool
CN107825317A (zh) * 2017-10-10 2018-03-23 合肥常青机械股份有限公司 一种汽车中门锁加强版贴棉治具

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103252659B (zh) * 2013-05-07 2016-05-04 浙江工业大学之江学院工业研究院 一种用于堆垛式蓄电池极板加工的随行夹具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350034A (en) * 1942-07-27 1944-05-30 Knu Vise Inc Toggle clamp
GB581670A (en) * 1944-10-10 1946-10-21 William Thomas George Jenkins Improvements in or relating to clamps
GB821132A (en) * 1954-12-20 1959-09-30 William Downie Cochrane Improvements in or relating to toggle clamps
GB932218A (en) * 1960-08-22 1963-07-24 Speed Tools Ltd Improvements in or relating to toggle clamps
GB1452624A (fr) * 1973-03-30 1976-10-13 Sta Co Mettallerzeugnisse Gmbh

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2350034A (en) * 1942-07-27 1944-05-30 Knu Vise Inc Toggle clamp
GB581670A (en) * 1944-10-10 1946-10-21 William Thomas George Jenkins Improvements in or relating to clamps
GB821132A (en) * 1954-12-20 1959-09-30 William Downie Cochrane Improvements in or relating to toggle clamps
GB932218A (en) * 1960-08-22 1963-07-24 Speed Tools Ltd Improvements in or relating to toggle clamps
GB1452624A (fr) * 1973-03-30 1976-10-13 Sta Co Mettallerzeugnisse Gmbh

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9417667U1 (de) * 1994-11-08 1995-01-05 DE-STA-CO Metallerzeugnisse GmbH, 61449 Steinbach Spannvorrichtung
EP0891838A1 (fr) * 1997-07-18 1999-01-20 Simpro S.p.A. Système de serrage de pièces d'assemblage, en particulier parties en tÔle à souder
US5984289A (en) * 1997-07-18 1999-11-16 Simpro S.P.A. System for precision clamping mechanical elements for assembly, in particular sheet metal parts for welding
US6817603B2 (en) 1999-02-17 2004-11-16 Danpres A/S Clamping tool
CN107825317A (zh) * 2017-10-10 2018-03-23 合肥常青机械股份有限公司 一种汽车中门锁加强版贴棉治具

Also Published As

Publication number Publication date
EP0015995A1 (fr) 1980-10-01

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Designated state(s): CH DE FR GB SE