US3044393A - Driving mechanisms of the movable platen of a platen-press - Google Patents

Driving mechanisms of the movable platen of a platen-press Download PDF

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Publication number
US3044393A
US3044393A US21191A US2119160A US3044393A US 3044393 A US3044393 A US 3044393A US 21191 A US21191 A US 21191A US 2119160 A US2119160 A US 2119160A US 3044393 A US3044393 A US 3044393A
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US
United States
Prior art keywords
platen
toggle
press
levers
positions
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.)
Expired - Lifetime
Application number
US21191A
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English (en)
Inventor
Kury Josef
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.)
Bobst Mex SA
Original Assignee
Bobst SA
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Filing date
Publication date
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Publication of US3044393A publication Critical patent/US3044393A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/18—Toggle-link means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/14—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/04—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed for mono-impression printing, e.g. on sheets
    • B41F1/08—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed for mono-impression printing, e.g. on sheets on webs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20588—Levers toggle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8841—Tool driver movable relative to tool support
    • Y10T83/8845—Toggle links, one link pivoted to tool support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8873—Straight line motion combined with tilting in plane of stroke

Definitions

  • the invention contemplates the provision of apparatus for displacing a platen while retaining the attitude of the same substantially constant.
  • This apparatus in accordance with a preferred embodiment of the invention comprises spaced toggle systems each including a fixed pivot, a displaceable pivot, levers connected respectively to said pivots, and an intermediate pivot connecting said levers.
  • the apparatus comprises means to guide the displaceable pivots in linear parallel paths, a drive shaft being provided having an axis of rotation and having rods connected thereto by means connecting the rods to the shaft at pivot axes spaced substantially equal distances from the axis of rotation of said shaft.
  • Each of the aforenoted toggle systems has positions of full extension and maximum displacement and further has positions intermediate the same.
  • the positions of the aforenoted intermediate pivots with the systems in full extension and in one of the intermediate positions define straight lines which intersect at the aforenoted axis of rotation.
  • levers of each toggle system define obtuse angles with the associated systems in full extension.
  • pivot axes associated with the drive shaft and the axis of rotation define an obtuse angle.
  • displaceable pivots are the means of connection to the aforenoted platen.
  • FIG. 1 illustrates partially in section and in side view the drive mechanism for a press employing a fixed and a movable platen
  • FIG. 2 schematically represents the arrangement of the various elements of the press of FIG. 1 as arranged in accordance with the prior art
  • FIG. 3 is a graph illustrating the relative movement of the platens according to the arrangement of FIG. 2;
  • FIG. 4 schematically illustrates the arrangement provided in accordance with a preferred embodiment of the invention.
  • FIG. 5 is a graph illustrating the relative attitude of the platens when the arrangement is provided in accordance with the illustration of FIG. 4.
  • the press of FIG. 1 includes a pair of frames 1 supporting a fixed upper platen 2 and connected with the base 3 of the driving mechanism of the lower movabl platen 4.
  • Platen 4 moves up and down successively once in the course of each working cycle of the press, and is driven by the toggle-levers 5 operated by the rods 6, which are connected by their heads to the main driving shaft 7 through eccentrics.
  • This sole shaft thus constitutes a common crank-shaft for all the rods. It is driven by a motor, not shown, driving the flywheel 8,- the shaft 9 and the worm 10 meshing with the toothed wheel 11, which is keyed to the said main shaft.
  • On opposite sides of the platens is an endless chain 12, these chains being connected together by conveyor-bars with grippers 13 and subjected to an intermittent drive.
  • This arrangement constitutes a press for processing material in sheets, which are conveyed one by one onto the table 14, registered by known means, not shown, then seized by the gripping bar immediately under the chain-wheels 15, and finally inserted one by one between the platens 2 and 4 in separate position.
  • FIGS. 2 and 3 make it possible to analyze what -is going on in the case described above.
  • FIG. 2 represents diagrammatically two opposed toggle-levers 16 and 17, respectively having fixed pivots 18 and 19.
  • Opposed pivots 20 and 21 are adapted for moving vertically in parallel slides and serve as fastenin'g points for the toggle-levers with respect to the movable horizontal platen 22.
  • pivot 21 be lowered to position 21, with toggle-lever 17 moving to position 17', at a level identical to that of position 16'.
  • crank 26 moves to position 26' which is symmetrical with respect to position 25 in relation to the vertical axis xy of the whole, so that the rod 24 assumes position 24'.
  • this point (the joint of the toggle-lever 17) happens to be at B, determining a deformation of the toggle-lever 17 more important than that of the toggle-lever 16, and consequently a lowering of the point 21 greater than that corresponding to the point 20 (this position moreover even impossible when adopting the proportions of this diagrammatic figure).
  • FIG. 3 will be obtained in which the ordinates correspond to the said course and the abscissas to a little more than a revolution (420), in the case of a press, the platen of which measures practically 800 mm. between the pivots 20 and 21, with a course H of 50 mm., the total length of the toggle-levers being about 400 mm. and the radius of the eccentrics crank being about 40 mm.
  • the curves are designated by H and H and the curves pass twice a cycle through a position of maximum distance E. This distance amounted to mm.
  • the object of the present invention is to reduce the above-noted swinging to make it practically negligible.
  • FIG. 4 of the attached drawing outlined in the same diagrammatical proportions as FIG. 2, makes it possible to explain the rules through the application, of which this can be attained.
  • references 16 to 22 designate the same parts as in FIG. 2, and the points A and B and the axis x.y on which is the axis 0' of the eccentrics are found here again.
  • This axis is however placed lower than 0 in the first example, i.e. at. the intersection of the straight lines CAO' and DBO'.
  • the points C and D correspond to the respective positions of the central joints of the toggle-levers in extension (upper dead point of the platen 22), it being understood that in this position, the two levers of each toggle-lever are not in linear alignment (see drawing) but form between them a large obtuseangle, for instance of 170.
  • the points A and B correspond to an intermediate position of the central joints, i.e. comprised between the aforementioned extension position and the maximum bending.
  • crank B will assume position E
  • the corresponding central joint will assume position G (rod E"-G)
  • the opposite central joint will assume position K, exactly symmetrical with respect to G.
  • the starting position (extension) and that obtained after one rotation of of the cranks are symmetry positions, insuring the perfect horizontality of platen 2 2.
  • the lengths A-O' and B-O are equal, each to a rod length; plus a crank length;
  • the lengths AE and B-F' are equal, corresponding to a rod length
  • the lengths O and O-F which are equal are the cranks.
  • -FIG. 5 represents curves similar to those of the FIG. 3, in the case of an arrangement such as that which has already been described, by placing A and B about halfway of the total travel of the central joint of the togglelevers.
  • FIGS. 3 and 5 correspond to an actual and practical example based, in both cases on the same platen and toggle-levers dimensions
  • the graphic representations of FIGS. 2 and 4 have deliberately been set up in the form of sketches because they are designed only to demonstrate geometrical properties which, in the case of a driving mechanism of the movable platen of a platen-type press in which this latter is moved by means of symmetrically arranged toggle-levers on either side of the crank-shaft axis which is common to them, may be formulated as follows:
  • This rule is the characteristic of the object of the present invention.
  • Apparatus for displacing a platen While retaining the attitude of the same substantially constant comprising spaced toggle systems each including a fixed pivot, a displaceable pivot, levers connected respectively to said pivots, and an intermediate pivot connecting said levers; means to guide the displaceable pivots in linear parallel paths extending perpendicular to the platen, a drive shaft having an axis of rotation, rods connected to the intermediate pivots; and means connecting said rods to said shaft and having connection with the rods at pivot axes spaced substantially equal distances from said axis of rotation; said toggle systems each having positions of full extension and maximum displacement and further having intermediate positions; the positions of the said in termediate pivots with the systems in full extension and in one of the intermediate positions defining straight lines which intersect at said axis of rotation.
  • Apparatus for displacing a platen while retaining the attitude of the same substantially constant comprising spaced toggle systems each including a fixed pivot, a displaceable pivot, levers connected respectively to said pivots, and an inter-mediate pivot c0nnecting said levers; means to guide the displaceable pivots in linear parallel paths extending perpendicular to the platen, a drive shaft having an axis of rotation, rods connected to the intermediate pivot; and means connecting said rods to said shaft and having connection with the rods at pivot axes spaced substantially equal distances from said axis of rotation; said toggle systems being movable between fully extended and maximum displaced positions under the action of the rotation of the drive shaft, the rods connected to the intermediate pivots of each toggle system being aligned with the corresponding means connecting the rods to the shaft to form an acute angle with respect to the platen with the toggle systems fully extended.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Press Drives And Press Lines (AREA)
US21191A 1959-05-05 1960-04-11 Driving mechanisms of the movable platen of a platen-press Expired - Lifetime US3044393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH7299959 1959-05-05

Publications (1)

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US3044393A true US3044393A (en) 1962-07-17

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US21191A Expired - Lifetime US3044393A (en) 1959-05-05 1960-04-11 Driving mechanisms of the movable platen of a platen-press

Country Status (6)

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US (1) US3044393A (es)
BE (1) BE691308A (es)
CH (1) CH354331A (es)
DE (1) DE1117989B (es)
FR (1) FR1252285A (es)
GB (1) GB911575A (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182588A (en) * 1962-10-23 1965-05-11 Bobst And Son S A J Presses comprising a movable platen driven by toggle levers
US5070719A (en) * 1990-10-16 1991-12-10 Amp Incorporated Tooling control mechanisms for stamping and forming die assemblies
US6053724A (en) * 1996-12-23 2000-04-25 Engel Maschinenbau Gesellschaft M.B.H. Double toggle mechanism
EP1175993A3 (en) * 2000-07-27 2002-04-17 Aida Engineering Co., Ltd. Driving device for a press machine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2900900C2 (de) * 1979-01-11 1982-10-07 RWM-Raster-Werkzeugmaschinen GmbH, 7136 Ötisheim Schnellaufende Exzenterpresse oder Stanze
DE2912927A1 (de) * 1979-03-31 1980-10-16 Schuler Gmbh L Antrieb fuer eine presse
US4600095A (en) * 1984-11-19 1986-07-15 Lamb Technicon Corp. Mechanical welding press
GB2168447B (en) * 1984-12-18 1988-08-17 Marconi Instruments Ltd Platen mechanism
GB2234196B (en) * 1989-07-22 1993-02-17 Verson Hme Ltd Press and method of working material
ITUA20165255A1 (it) * 2016-06-28 2017-12-28 Alessandro Breveglieri Sollevatore applicato a rulliere di trasporto materiali o pallets la cui caratteristica e' quella di trasportare il carico a filo terra, di avere percio' i rulli di poco sollevati da terra,di essere comandato da una sola motorizzazione e di avere caratteristiche di ingombro specifiche e tali da consentire le operazioni di avvolgimenti per l'imballaggio del pallet e del suo carico
DE102020203708A1 (de) 2020-03-23 2021-09-23 Zf Friedrichshafen Ag Hubvorrichtung mit Ausgleichfunktion zur Reduzierung eines Verkippens

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16179C (de) * F. BLÜTHGEN in Wittenberg (Prov. Sachsen) Lenkvorrichtung an Strafsenfuhrwerken
US50635A (en) * 1865-10-24 Improved cotton-press
FR490083A (fr) * 1918-02-02 1919-04-01 Thomas Henri Webb Cisaille mécanique
DE594270C (de) * 1929-08-21 1934-03-14 Thomas Luther Green Maschine zum Praegen und Ausstanzen von Keksen
GB611750A (en) * 1945-04-18 1948-11-03 Bobst Fils Sa J Improvements in or relating to mechanical presses
US2587746A (en) * 1948-08-24 1952-03-04 May Otto Hermann Toggle press linkage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE16179C (de) * F. BLÜTHGEN in Wittenberg (Prov. Sachsen) Lenkvorrichtung an Strafsenfuhrwerken
US50635A (en) * 1865-10-24 Improved cotton-press
FR490083A (fr) * 1918-02-02 1919-04-01 Thomas Henri Webb Cisaille mécanique
DE594270C (de) * 1929-08-21 1934-03-14 Thomas Luther Green Maschine zum Praegen und Ausstanzen von Keksen
GB611750A (en) * 1945-04-18 1948-11-03 Bobst Fils Sa J Improvements in or relating to mechanical presses
US2587746A (en) * 1948-08-24 1952-03-04 May Otto Hermann Toggle press linkage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182588A (en) * 1962-10-23 1965-05-11 Bobst And Son S A J Presses comprising a movable platen driven by toggle levers
US5070719A (en) * 1990-10-16 1991-12-10 Amp Incorporated Tooling control mechanisms for stamping and forming die assemblies
US6053724A (en) * 1996-12-23 2000-04-25 Engel Maschinenbau Gesellschaft M.B.H. Double toggle mechanism
EP1175993A3 (en) * 2000-07-27 2002-04-17 Aida Engineering Co., Ltd. Driving device for a press machine

Also Published As

Publication number Publication date
CH354331A (fr) 1961-05-15
DE1117989B (de) 1961-11-23
FR1252285A (fr) 1961-01-27
GB911575A (en) 1962-11-28
BE691308A (es) 1967-05-29

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