EP0633077B1 - Dispositif pour l'avance intermittente de pièces de travail - Google Patents

Dispositif pour l'avance intermittente de pièces de travail Download PDF

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Publication number
EP0633077B1
EP0633077B1 EP94106888A EP94106888A EP0633077B1 EP 0633077 B1 EP0633077 B1 EP 0633077B1 EP 94106888 A EP94106888 A EP 94106888A EP 94106888 A EP94106888 A EP 94106888A EP 0633077 B1 EP0633077 B1 EP 0633077B1
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EP
European Patent Office
Prior art keywords
gripper
feed
movement
bar
levers
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
EP94106888A
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German (de)
English (en)
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EP0633077A1 (fr
Inventor
Uwe Dipl.-Ing Fh Zeibig
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.)
Sander GmbH and Co
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Sander GmbH and Co
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Publication date
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Publication of EP0633077A1 publication Critical patent/EP0633077A1/fr
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Publication of EP0633077B1 publication Critical patent/EP0633077B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses
    • B21D43/055—Devices comprising a pair of longitudinally and laterally movable parallel transfer bars

Definitions

  • the invention relates to a device for the gradual advancement of workpieces with two gripper parts or regions which can be moved back and forth in the direction of advance for gripping the workpieces and which have gripper rails according to the preamble of patent claim 1.
  • Such a device is known from US-A-1 426 039.
  • the pivotable levers engage with one end spaced apart from their pivot point directly in longitudinal guides located on the gripper rails and also each have a second arm which is connected to a drive linkage extending laterally of a gripper rail.
  • the levers therefore engage directly on the longitudinal guides located at the ends of the gripper rails and require space on the side of their fixed bearings for their actual swivel drive.
  • the levers cooperating with the second gripper rail are also driven by crossbars from the levers, which are effective on the first gripper rail, so that overall a relatively large drive effort is required in that two-armed levers are required with a corresponding space requirement.
  • the gripper rails For the movement of the gripper rails in their longitudinal direction of extension, they are connected to one another, the length of this connection having to be changeable because of the gripping movement taking place in the transverse direction. It is therefore necessary between the gripper rails a plurality of telescopically adjustable and mutually adjustable linkages, which would hinder the gripping of workpieces which should possibly also extend somewhat below their level between the gripper rails.
  • a device of another type is therefore already known from DE-C-28 52 929.
  • a mechanism arranged below the plane of the gripper rails is provided with a cam disc that can be rotated about a horizontal axis and a vertically movable plunger that drives two counter-rotating gears via a toothing, which in turn by means of Comb the racks located on the gripper rails.
  • the shafts of the gear wheels must be guided approximately over the length of the gripper rail in order to be able to drive a plurality of gear wheels at a distance from one another for uniform lateral movement of the respective gripper rail.
  • the arrangement especially of the gears and the shaft connecting them, takes up a considerable height below the gripper rails.
  • the entire drive is a complex mechanism, which due to the multiple interacting teeth and the cam disc an unfavorable efficiency Has.
  • the invention is therefore based on the object to provide a device of the type mentioned, in which the overall height in the gripping area of the gripper rails is low, a space-saving arrangement is made possible, the synchronization of the pivotable levers is simple and the detection of workpieces between the gripper rails is not can be affected by drive means.
  • the levers acting as rockers can be pivoted approximately in the plane of movement of the gripper rail or parallel to it, ie their pivot axes are approximately perpendicular to the plane within which the gripper rails are moved, one below is omitted the gripper rails with a spaced shaft and thus the space required for this.
  • the portion of the pivoting path of the pivotable lever which effects the most favorable lever transmission and force transmission in the gripping direction can be used, so that a favorable efficiency is made possible.
  • each gripper rail is guided on a pulling and / or push rod and the levers engage thereon, the gripper rails connecting telescopically variable rods are avoided, so that the space between the gripper rails remains free, that is to say the detection of workpieces is not impaired by drive means can.
  • the fixed leg bearings of the levers can be arranged on the sides of the gripper rails facing away from one another or in each case in the space between the gripper rails.
  • the former variant has the advantage that the space between the gripper rails - also from the levers - remains free.
  • the arrangement of the levers in the space between the gripper rails - of course, outside or below their gripping areas, where the gripping of workpieces can also not be impaired - has the advantage, however, that under very cramped conditions the advantageous drive type with swiveling levers that are parallel to the plane are pivotable, within which the gripping movements take place, can be carried out.
  • the fixed pivot bearings of the levers can be arranged at a distance from the gripper rails.
  • An embodiment of the drive of very considerable importance can consist in that the pivotable levers are held in the gripping position by a hydraulically or pneumatically acting or mechanical spring or similar restoring element and can be pivoted against the restoring force of the restoring element in the open position. In this way, the entire drive for the gripping movement can be made free of play, which the Precision of the gripping movement increased accordingly. Furthermore, a drive is effected in one direction only because the opposite movement can be carried out by the restoring force mentioned.
  • the levers can each turn or pivot on the pull and / or push rod.
  • the levers acting on each gripper rail are connected to one another and simultaneously act indirectly on the gripper rail.
  • the pull and / or push rod can be arranged below the gripper rail on this.
  • the gripper rail it is possible for the gripper rail to bear or have, at least in regions, a U-shaped or C-shaped cross-sectional profile in which the pull and / or push rod fits.
  • the pull and / or push rod forms a unit with the gripper rail, so it does not require any additional space and effects an effective synchronization of the respective pivotable lever, where the corresponding adjusting forces are transmitted to the gripper rail, is on this Way well protected the pull and / or push rod against dirt or damage.
  • a modified embodiment for the smoothest possible relative displacement movement between gripper rail and pull and / or push rod can be achieved in that the gripper rail has a guide rail on which a carriage connected to the pull and / or push rod engages. This allows a ball or roller guide to be provided between the carriage and the guide rail. However, a sliding fit is also conceivable in particular when using a U-shaped or C-shaped cross-sectional profile.
  • the tie rods and / or push rods for the two gripper rails can be connected to one another outside the gripping region, in particular have a gripper cross member connecting them, and a single drive can be provided for actuating the swivel levers.
  • the arrangement of the rockers or levers ensures that the gripper rails each perform opposite movements for gripping the workpiece and for releasing it; nevertheless, with the aid of the gripper crossmember mentioned, this partially opposite movement of all levers and tension elements can be carried out with a single drive. This in turn saves space and the synchronization is achieved very easily with a backlash-free drive.
  • the connection of the two pulling elements of the two gripper rails to one another and the possibility of thereby requiring only a single drive for their movement is therefore of particularly advantageous importance.
  • a cam or link plate arranged outside the gripping area and a rocker can be provided, which rocker from the cam or link plate in the sense of a longitudinal movement of the Drawbars is pivotable, the curve or backdrop of the cam being arranged so that the gripping movement is adapted in time to the feed movement of the gripper rail.
  • the traverse for connecting the rods and the cam disc provided for their drive can be arranged on extensions of the tie rods. They are therefore outside the area where the respective workpieces have to be gripped, that is, no additional space is required for this drive within a press or other machine tool.
  • the gripper rails can in turn be connected to one another outside the gripping area, in particular in the area of the extensions of the tie rods, by means of a feed traverse or the like and have a common feed drive.
  • a feed traverse or the like can be connected to one another outside the gripping area, in particular in the area of the extensions of the tie rods, by means of a feed traverse or the like and have a common feed drive.
  • Claim 15 specifies a measure by which the overall height of the device can be kept as small as possible.
  • the claims 16 to 18 contain advantageous measures with which the respective stroke of the feed movement or the gripping movement can be changed in a simple manner within the drive, wherein a single adjustment device is sufficient due to the advantageous transmission of the drives to the feed on the one hand and with the help of other adjustment movement, on the other hand, to change the dimensions of the gripping movement.
  • Claim 19 contains a combination of features by which the attack of the gripping plunger interacting with the pull rods on the associated cam disc is free of play, without any measures being required for readjustment. Any wear is automatically compensated for by the restoring force of the spring or the restoring element.
  • the claims 20 and 21 contain expedient constructive designs of the connection between the slide actuated by the coupling gear and the tie rods or the gripper rails, the guides or guide slots running in the direction of extension of the crossbars the relative movements of the gripper rails and thus also the tie rods towards and away from each other despite enable common drive with these trusses.
  • the space requirement of the device is small, especially where the workpieces have to be gripped or released, while the drive is provided primarily for opening and closing the gripper rails, but also for their feed outside a corresponding processing machine, in particular a press can.
  • a device designated as a whole by 1, is used for the gradual advancement of workpieces 100, for example within a press 2, where these workpieces are subjected to an additional machining operation after each such feed movement.
  • the device 1 has two parallel gripper rails 3 which can be moved and retracted in the feed direction according to the arrow PF1 in FIG. 2 and on which gripper parts 3a are provided as grippers for gripping the workpieces 100 in a known manner.
  • the gripper rails 3 can be moved towards one another and can be moved away from each other again for releasing, i.e. the gripper rails 3 make a total of four different movements, namely a gripping movement in which the gripper rails 3 are moved towards one another, a feed movement, one opposite the gripper movement Opening movement and a return movement opposite to the feed movement in the starting position.
  • the gripper rails 3 are alternately movable towards one another for gripping the workpieces 100 and can be moved together in the feed direction for advancement and then in turn can be moved away from one another and finally adjusted back together in the starting position.
  • each of two levers 4 which can be pivoted parallel to one another in the plane of movement of the gripper rails 3 or a plane parallel to them, act on each gripper rail 3, as can be seen above all from FIGS. 2 and 3.
  • the levers 4 of the one gripper rail 3 can be pivoted in the opposite direction to those of the other gripper rail 3 in order to alternately move the two gripper rails 3 towards and away from one another. So that this movement can be carried out largely independently of the feed movement, the levers 4 are each coupled to a longitudinal guide 7 of the gripper rails 3 via a sliding element 6.
  • the gripper rails 3 can also be moved relative to the articulation points of the ends 5 of the levers 4 in the feed direction or in the opposite direction.
  • the swiveling levers 4 each engaging on a gripper rail 3 are mechanically connected to one another by a pull rod 8 according to FIGS.
  • a push rod or another pulling element would also be conceivable, but a pulling rod is particularly cheap because it allows good synchronization of the two pivoting levers 4 acted upon by it with good power transmission and precise guidance at the same time.
  • the fixed pivot bearings 9 of the pivotable levers 4 are on the respective in the exemplary embodiment sides of the gripper rails 3 facing away from one another are arranged at some distance from them.
  • FIG. 3 shows that the pivotable levers 4 are held in the gripping position by a hydraulically or pneumatically acting or mechanical spring or the like restoring element 10 and can be pivoted against the restoring force of the restoring element 10 in the open position.
  • the restoring element 10 can be seen below a shaft 11 which can be rotated in the fixed pivot bearing 9 relative to rolling bearings or the like and which carries the pivot arm 4 on its opposite part which projects above the bearing 9.
  • This arrangement therefore means that the pivoting of the pivot lever 4 only has to be driven in one direction, while the opposite movement is brought about by the restoring element 10. This results in freedom of play for the drive of the swivel levers and thus the execution of the gripping movement, that is to say a high degree of accuracy.
  • the pull rod 8 which connects the two swivel levers 4 to one another, on which, conversely, the swivel levers 4 are rotatably supported with their free end 5, is guided on the gripper rail 3 and can therefore perform a relative sliding movement with respect to the gripper rail 3 or the gripper rail 3 can can be moved in relation to this tie rod 8 in its longitudinal direction.
  • the gripping movements can thus be transmitted from the swivel levers 4 to the gripper rail via the pull rod, the pull rod 8 synchronizing these movements of the swivel levers 4 in a simple manner, while independently of this, the feed movement of the gripper rails 3 is still possible.
  • the pull rod 8 is arranged below the gripper rail 3.
  • the gripper rail 3 carries, as a longitudinal guide 7, at least in some areas, a U-shaped or C-shaped cross-sectional profile, which can be connected to it, for example, by screws 12 and into which the pull rod 8 fits in a sliding fit.
  • a synchronous movement of the swivel lever 4 can be effected and transmitted in the sense of a gripping movement to the gripper rails 3, which, however, can also perform feed and retraction movements relative to these swivel levers 4 and the pull rod 8 that synchronizes them.
  • the gripper rail 3 has a somewhat modified longitudinal guide 7, which consists in that a guide rail 3a is attached to the gripper rail 3, on which a carriage 3b connected to the pull and / or push rod 8 engages .
  • balls 3c can be arranged between the carriage 3b and the guide rail 3a in order to keep the friction as low as possible.
  • the length of the guide carriage 3b oriented in the sliding direction can be seen in FIG. 9.
  • seals 3d can be seen which protect the entire longitudinal guide 7 from contamination.
  • the pivotable lever 4 again engages in a manner not shown, i.e. in this regard, the lever 4 corresponds to the arrangement in FIG. 3.
  • FIG. 2 it is shown that the tie rods 8 for the two gripper rails 3 are connected to one another outside the gripping regions, specifically via a connecting link Gripper crossbeam 13, so that a single drive, shown in more detail in FIGS. 6 and 7 and also FIGS. 12 and 13, there, designated 14 as a whole, is sufficient to actuate the swivel lever 4.
  • a cam or link plate 15 arranged outside the gripping area and a rocker 16 acted upon by it are provided for actuating the pull rods 8, which rocker 16 can be pivoted by the cam or link plate 15 in the sense of a longitudinal movement of the pull rods 8 , wherein the curve or backdrop of the cam 15 is arranged so that the gripping movement is adapted in time to the feed movement of the gripper rails 3 to be explained, that is, the desired chronological order of these movements is maintained.
  • the gripper crossbar 13 for connecting the tie rods 8 and the cam 15 provided for their drive are provided acting on extensions of the tie rods 8, these extensions being connected to the drive 14 outside the frame of the machine or press 2.
  • the gripper rails 3 are in turn offset outside of the gripping area and with respect to the tie rods 8, are connected to each other by a feed crossmember 13a or a comparable coupling member and can therefore also have a common feed drive , which can act simultaneously and synchronously on both gripper rails 3 via this feed crossmember 13a.
  • One carriage 25 is connected to the tie rods 8 via the gripper crossmember 13 and the other carriage 25 is connected to the gripper rails 3 via the feed crossmember 13a.
  • the gripper crossmember 13 and the feed crossmember 13a are each one in their direction of extension transversely or at right angles to the tie rods 8 and to the gripper rails 3 have a guide in the form of a guide slot 13b, in which a projection 13c connected to the respective tie rod 8 or gripper rail 3 engages.
  • tie rods 8 with respect to the gripper crossmember 13 and the gripper rails 3 with respect to the feed crossmember 13a can carry out the required relative movements when changing their mutual distance, while on the other hand they are moved in their longitudinal extension direction via these crossmembers 13 and 13a.
  • a cam or link plate 17 is also provided for the advance of the gripper rails 3, the drive axis or shaft 18 of which corresponds in the exemplary embodiment to that for driving the cam plate 15 for driving the pull rod 8 4, 11 and 13, one and the same shaft 18 is provided as the main shaft for both cams 15 and 17, which is connected to an angular gear 20 according to FIG. 1 via a propeller shaft 19, with which the crankshaft or the drive of the press 2 can be used for this drive of the gripper rails 3.
  • a positively controlled drive designed in this way means a maximum number of strokes, since an absolute synchronous operation between press and device is realized.
  • the control cams of the two cams 15 and 17 are offset from one another and configured in their curvature in such a way that the rocker 16 driven by them for the gripping movement on the one hand and the rocker 21 for the advancing movement or retracting movement on the other are coordinated with one another in time, that is to say at least for one Some are staggered in time, each in the final phase one movement can overlap the other movement.
  • the rockers 16 and 21, each driven by the cam disks 15 and 17, are each pivotably connected to a tappet 23 which interacts with the cam disk via a projection 22 or the like, this being connected to the respective cam disks 15 and 17 interacting gripping plungers 23a and feed plungers 23b according to FIG.
  • the plungers 23a and 23b are in turn coupled via a sliding block 24 or the like to the rocker 16 or 21 and thus on the one hand to the tie rods 8 and on the other hand to the gripper rails 3, but between the rockers 16 and 21 and the rod-shaped parts driven by them a carriage 25 to be described (see in particular FIGS. 4 to 7) is also arranged.
  • the axis of rotation of the cams 15 and 17 formed by the main shaft 18 is arranged at right angles to the plane in which the gripper rails 3 can be moved, that is to say vertically in the exemplary embodiment, as shown in FIGS. 1 and 4.
  • the overall height is correspondingly low because flat and thus low-height cams 15 and 17 can be used.
  • the stroke of the gripper rails 3 in the feed direction on the one hand and in the gripping movement direction on the other hand can be changed, that is to say the dimensions of the respective movements can be changed and adjusted.
  • the drive for the gripper rails 3 and / or the swivel levers 4 or the pull rod 8 each have an adjusting device to be explained in more detail, with which the feed of the gripper rails 3 or the Movement of the gripper rails 3 towards one another can be changed with regard to their stroke or their dimension.
  • a sliding block 28 is slidably provided, which by means of a spindle 29 arranged on the respective slide 25 and a nut 31 acting on it via a pivot pin 30 in the longitudinal direction of the rocker 16 or 21 is adjustable.
  • the adjusting spindle 29 which is also indicated in terms of its end in FIGS. 5 and 7, is mounted on the underside of the respective slide 25, but protrudes over the slide in order to be detected at the projecting end for the adjusting rotary movement to be able to.
  • the spindle 29 is thus arranged in each case in the slide 25 adjustable in the feed direction of the gripper rails 3 or the pull rods 8 and the nut 31 is adjustable in a corresponding recess in the slide 25 on the spindle 29 by its rotation. Since the slides 25 are coupled to the gripper rail 3 or the pull rod 8, affects the adjustment of the nut and thus the sliding block in the desired stroke adjustment. The closer the sliding block 28 is adjusted with the aid of the nut 31 and the spindle 29 to the pivot bearing 32 of the respective rocker 16 or 21, the shorter the respective movements of the gripper rail 3 or the pull rod 8, the shorter movement of the pull rod 8 also causes a smaller pivoting path of the pivot lever 4 and thus a smaller gripping movement of the gripper rails 3.
  • FIG. 5 it can be seen that the cam disc 17 for the advance of the gripper rails 3 is arranged on the feed tappet 23b between two cam rollers 22, which act on these two cam rollers 22 at the same time, and one cam roller 22 for the feed movement and the other cam roller 22 for the retraction movement acted upon.
  • the feed movement and the withdrawal movement of the gripper rail 3 are therefore both positively controlled.
  • the tappets 23a and b are advantageously arranged immediately above or below the cam disks 15 and 17 and have elongated slots 33 which permit their adjustment movement relative to the main shaft 18 passing through them.
  • the gripping plunger 23a and the feed plunger 23b have guides which run at an angle, in the exemplary embodiment at right angles, to one another, e.g. Linear roller guides 23c are mounted for longitudinal displacement.
  • the longitudinal centers of these guides 23c each intersect the center of the shaft 18 and run radially thereto, as can be clearly seen from FIGS. 10 and 12.
  • these guides 23c are oriented at an angle, in the exemplary embodiment at 45 °, to the direction of movement of the slides 25, and the rockers 16 and 21, which are actuated by the plungers 23a and 23b, act on the slides 25 from two under a corresponding angle to each other arms exist, so that despite the somewhat different arrangement of the plungers 23a and 23b on the slide 25, the same transmission movements occur as in the above-described embodiment according to FIGS. 4 to 6, that is to say in FIGS. 10 to 13 a kinematic 4 to 6 matching coupling gear is shown. It is in the left part FIGS. 10 and 12 each show visible slides 25 for the advance of the gripper rails 3 in the middle position of this advance, that is to say they can be shifted further to the right and to the left, while the other slide 25 assumes its left end position.
  • the cam disk 17 is in this embodiment according to FIGS. and retraction movement of the gripper rails 3 is designed as a plate cam disc with a raised guide bead 17a, on which guide bead 17a a cam roller 22 or similar projection of the feed tappet 23b engages on both sides.
  • the guide bead 17a is thus between the two cam rollers 22, so that it can cause reciprocating movements on the feed tappet 23b.
  • both plungers 23a and 23b can lie and work in the flatest possible design of the entire drive 14 in the same plane.
  • the slides 25 in turn directly or indirectly engage the cross members 13 and 13a in order to carry out the correspondingly coordinated feed and gripping movements and the subsequent opening and retracting movements, with all these movements due to the features and items described above, a single drive via the shaft 18 is sufficient.
  • the device 1 for the step-by-step advancement of workpieces for example in a press 2 or similar production machine or also for other machining operations to be carried out step-by-step, thus has two gripping parts 3 a or gripping areas for gripping the workpieces 100 that have gripper rails 3 that are used to grasp the Workpieces towards one another and for advancing in this gripping position can be moved together in the feed direction and then release the workpieces by a movement apart and can be adjusted back to the starting position by a return movement.
  • Each gripper rail 3 is engaged by the pivotable ends 5 or end regions of at least two levers 4 which can be pivoted in the plane of movement of the gripper rail 3 or in a plane parallel thereto, these levers 4 of the one gripper rail 3 being pivotable in opposite directions to those of the other gripper rail 3, and these Levers 4 are each coupled via a longitudinal guide 7. It is particularly expedient if pivoting levers 4 each engaging on a gripper rail 3 are mechanically connected to one another, in particular by means of a pull rod 8, and can thus be moved synchronously. This results in an effective drive that is easy to keep free of play, especially for the gripping movement, which takes up little space.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Pinball Game Machines (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Multi-Process Working Machines And Systems (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Feeding Of Workpieces (AREA)
  • Press Drives And Press Lines (AREA)
  • Specific Conveyance Elements (AREA)

Claims (27)

  1. Dispositif (1) pour faire avancer des pièces pas à pas, comprenant deux rails de préhension (3) qui peuvent être déplacés en va-et-vient dans la direction de l'avance, qui comportent des organes ou des zones de préhension pour saisir les pièces, qui peuvent être déplacés l'un vers l'autre pour saisir les pièces et pour les déplacer ensemble dans la direction de l'avance et qui, alternativement, peuvent être déplacés ensuite à nouveau jusque dans la position de départ par un écartement l'un de l'autre et par un déplacement de retour, dans lequel les extrémités pivotantes (5) ou des zones d'extrémité d'au moins deux leviers (4) qui peuvent pivoter parallèlement entre eux dans le plan de déplacement des rails de préhension (3) ou dans un plan parallèle à celui-ci viennent en prise avec chaque rail de préhension (3), cependant que ces leviers (4) de l'un des rails de préhension (3) peuvent pivoter en sens inverse de ceux de l'autre rail de préhension (3), et qu'ils sont accouplés par l'intermédiaire d'un guidage longitudinal (7) des rails de préhension (3), caractérisé par le fait que chaque rail de préhension (3) est guidé dans la direction de son étendue longitudinale sur une tige de traction et/ou de poussée (8) au moyen de laquelle les leviers (4) qui viennent en prise indirectement avec le rail de préhension respectif (3) sont reliés entre eux mécaniquement et peuvent être déplacés en synchronisme.
  2. Dispositif selon la revendication 1, caractérisé par le fait que les paliers de pivotement fixes (9) des leviers pivotants (4) sont disposés sur les côtés opposés entre eux des rails de préhension (3) ou, à chaque fois, dans l'intervalle entre les rails de préhension (3).
  3. Dispositif selon la revendication 2, caractérisé par le fait que les paliers de pivotement fixes (9) des leviers (4) sont disposés à distance des raiis de préhension (3).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que les leviers pivotants (4) peuvent être maintenus dans la position de préhension par un élément élastique hydraulique, à effet pneumatique ou mécanique, ou par un élément de rappel similaire (10), et qu'ils sont amenés à pivoter jusque dans la position d'ouverture à l'encontre de la force de rappel de l'élément de rappel (10).
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que les leviers (4) viennent à chaque fois en prise d'une manière tournante ou pivotante avec la tige de traction et/ou de poussée (8).
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait que la tige de traction et/ou de poussée (8) est disposée au-dessous du rail de préhension (3) en étant guidée sur celui-ci.
  7. Dispositif selon l'une des revendications 1 à 6, caractérisé par le fait que le rail de préhension (3) porte ou présente, du moins par régions, un profil à section transversale en forme de U ou de C (11) dans lequel s'ajuste la tige de traction et/ou de poussée (8).
  8. Dispositif selon l'une des revendications 1 à 7, caractérisé par le fait que le rail de préhension (3) présente un rail de guidage (3a) avec lequel vient en prise un chariot (3b) qui est relié à la tige de traction et/ou de poussée (8).
  9. Dispositif selon l'une des revendications 1 à 8, caractérisé par le fait que les tiges de traction et/ou de poussée (8) qui sont destinées aux deux rails de préhension (3) sont reliées entre elles à l'extérieur de la zone de préhension, qu'elles présentent une traverse de préhension (13) qui les relie, et qu'il est prévu un entraînement unique (14) pour l'actionnement des leviers (4).
  10. Dispositif selon l'une des revendications 1 à 9, caractérisé par le fait qu'en vue de l'actionnement de la ou des tiges de traction et/ou de poussée (8), il est prévu un disque à came ou à coulisse (15) qui est disposé à l'extérieur de la zone de préhension, ainsi qu'une manivelle oscillante (16), ladite manivelle oscillante (16) pouvant être amenée à pivoter par le disque à came ou à coulisse (15) dans le sens d'un déplacement longitudinal des tiges de traction et/ou de poussée (8), cependant que la came ou la coulisse du disque à came (15) est disposée d'une manière telle que le déplacement de préhension soit adapté dans le temps au déplacement d'avance des rails de préhension (3).
  11. Dispositif selon les revendications 9 et 10, caractérisé par le fait que la traverse de préhension (13) qui est destinée à relier les tiges de traction (8), ainsi que le disque à came (15) qui est prévu pour leur entraînement, sont disposés de façon à agir sur des prolongements des tiges de traction (8).
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé par le fait que les rails de préhension (3) sont reliés entre eux pour leur part à l'extérieur de la zone de préhension, et ce, par une traverse d'avance (13a) ou similaire, et qu'ils présentent un entraînement d'avance commun.
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé par le fait qu'il est prévu pour l'avance des rails de préhension (3) un disque à came ou à coulisse (17) dont l'axe d'entraînement ou l'arbre (18) coincide en particulier avec celui qui est destiné à l'entraînement de la tige de traction et/ou de poussée (8), et par le fait que les cames de commande des deux disques à came (15, 17) sont décalées l'une par rapport à l'autre d'une manière telle que la manivelle oscillante (16) destinée au déplacement de préhension, d'une part, et la manivelle oscillante (21) destinée au déplacement d'avance ou de retour, d'autre part, qui sont entraînées par elles soient accordées entre elles dans le temps.
  14. Dispositif selon la revendication 13, caractérisé par le fait que les manivelles oscillantes (16, 21) qui sont à chaque fois entraînées par les disques à cames (15, 17) sont à chaque fois reliées en pivotement à un coulisseau de préhension (23a) et à un coulisseau d'avance (23b) coopérant avec le disque à came par l'intermédiaire d'un galet de came (22) ou similaire, et que ces coulisseaux sont accouplés pour leur part en particulier à la manivelle oscillante (16, 21) par l'intermédiaire d'une tête coulissante (24) ou similaire.
  15. Dispositif selon la revendication 14, caractérisé par le fait que l'axe de rotation des disques à cames (15, 17) est disposé perpendiculairement au plan dans lequel les rails de préhension (3) sont mobiles, en étant en particulier disposé verticalement.
  16. Dispositif selon l'une des revendications 1 à 15, caractérisé par le fait que l'entraînement destiné aux rails de préhension (3) et/ou aux leviers pivotants (4) ou à la tige de traction (8), respectivement, présente un dispositif de réglage au moyen duquel on peut modifier l'avance des rails de préhension (3) et/ou le déplacement des rails de préhension (3) l'un par rapport à l'autre.
  17. Dispositif selon la revendication 16, caractérisé par le fait que l'endroit de venue en prise (26) sur la manivelle oscillante (16, 21) qui est actionnée par le disque à came (15, 17) en vue de l'accouplement avec le rail de préhension (3) ou avec la tige de traction (8) peut être déplacé dans la direction longitudinale de la manivelle oscillante, afin de modifier la partie active du bras de la manivelle oscillante.
  18. Dispositif selon la revendication 10, caractérisé par le fait qu'il est prévu dans une fente longitudinale (27) de la manivelle oscillante (16, 21) une tête coulissante (28) pouvant être déplacée dans la direction longitudinale de la manivelle oscillante au moyen d'une broche (29) qui est disposée sur le chariot (25) et d'un écrou (31) qui vient en prise avec cette tête, cependant que la broche (29) est disposée dans un chariot (25) qui peut être déplacé dans la direction de l'avance des rails de préhension (3) et/ou des tiges de traction (8), que l'écrou peut être déplacé sur cette broche (29), et que ce chariot (25) est accouplé aux rails de préhension (3) et/ou à la tige de traction (8).
  19. Dispositif selon la revendication 10, caractérisé par le fait que le disque à came (17) destiné à l'avance des rails de préhension (3) est disposé sur le coulisseau d'avance (23b) entre deux galets de came (22) en venant en prise avec les deux en même temps, cependant que l'un des galets de came agit pour le déplacement d'avance et que l'autre galet de came agit pour le déplacement de retour.
  20. Dispositif selon la revendication 10, caractérisé par le fait que le disque à came (15) destiné au déplacement de la tige de traction (8) agit sur un galet de came (22) qui se trouve sur le coulisseau de préhension (23a), et que la transmission du déplacement de la tige de traction (8) aux leviers pivotants (4) a lieu sans jeu grâce à la force de rappel du ressort ou de l'élément de rappel (10) qui agit à l'encontre du déplacement.
  21. Dispositif selon la revendication 12, caractérisé par le fait que l'un des chariots (25) est relié aux tiges de traction (8) par l'intermédiaire de la traverse de préhension (13), et que l'autre chariot est relié aux rails de préhension (3) par l'intermédiaire de la traverse d'avance (13a).
  22. Dispositif selon la revendication 21, caractérisé par le fait que la traverse de préhension (13) et la traverse d'avance (13a) comportent chacune un guidage ou une fente de guidage (13b) qui s'étend dans la direction de son étendue, transversalement par rapport aux tiges de traction (8) et aux rails de préhension (3), ou perpendiculairement à eux, et dans laquelle pénètre une partie en saillie (13c) reliée à la tige de traction correspondante (8) ou au rail de préhension correspondant (3).
  23. Dispositif selon la revendication 22, caractérisé par le fait que le coulisseau de préhension (23a) et le coulisseau d'avance (23b) sont disposés dans le même plan, et que, par des parties en saillie ou des galets de came (22) en saillie sur eux sur des côtés opposés, ils viennent en prise avec des disques à came (15, 17) qui sont superposés d'une manière coaxiale.
  24. Dispositif selon la revendication 23, caractérisé par le fait que le coulisseau de préhension (23a) et le coulisseau d'avance (23b) sont montés en pouvant coulisser dans le sens longitudinal dans des guidages, et en particulier dans des guidages à galets rectilignes (23c) qui forment un angle entre eux et qui sont en particulier perpendiculaires entre eux.
  25. Dispositif selon la revendication 24, caractérisé par le fait que les axes longitudinaux des guidages (23c) qui sont destinés aux coulisseaux (23a, 23b) passent chacun par l'axe de l'arbre (18), et qu'ils s'étendent radialement par rapport à celui-ci.
  26. Dispositif selon la revendication 25, caractérisé par le fait que les guidages (23c) sont orientés obliquement, et en particulier sous un angle de 45°, par rapport à la direction de déplacement des chariots (25), et que les manivelles oscillantes (16, 21) qui sont soumises à l'action des coulisseaux (23a et 23b) et qui viennent en prise avec les chariots (25) sont constituées chacune par deux bras qui forment entre eux un angle correspondant.
  27. Dispositif selon la revendication 10, caractérisé par le fait que le disque à came (17) qui est destiné aux déplacements d'avance et de retour des rails de préhension (3) est réalisé sous la forme d'une came à plateau qui est pourvue d'un bourrelet de guidage en saillie vers le haut (17a) sur lequel un galet de came (22) ou une partie en saillie similaire du coulisseau d'avance (23b) vient à chaque fois en prise des deux côtés d'une manière telle que le bourrelet de guidage (17a) se trouve entre ces deux galets de came (22) ou similaires.
EP94106888A 1993-05-08 1994-05-03 Dispositif pour l'avance intermittente de pièces de travail Expired - Lifetime EP0633077B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4315372A DE4315372C2 (de) 1993-05-08 1993-05-08 Vorrichtung zum schrittweisen Vorschieben von Werkstücken
DE4315372 1993-05-08

Publications (2)

Publication Number Publication Date
EP0633077A1 EP0633077A1 (fr) 1995-01-11
EP0633077B1 true EP0633077B1 (fr) 1997-03-19

Family

ID=6487582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94106888A Expired - Lifetime EP0633077B1 (fr) 1993-05-08 1994-05-03 Dispositif pour l'avance intermittente de pièces de travail

Country Status (4)

Country Link
EP (1) EP0633077B1 (fr)
AT (1) ATE150345T1 (fr)
DE (2) DE4315372C2 (fr)
ES (1) ES2100594T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG91261A1 (en) * 2000-03-11 2002-09-17 Nutek Pte Ltd Variable width conveyor
EP1336440A1 (fr) 2002-02-19 2003-08-20 Erdrich Beteiligungs GmbH Dispositif pour le mouvement des pièces avec des barres d'amenage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7234912B2 (en) 2003-10-01 2007-06-26 Schuler Automation Gmbh & Co. Kg Device for the transport of work pieces
DE10345685B4 (de) * 2003-10-01 2005-10-13 Schuler Automation Gmbh & Co.Kg Vorrichtung zum Transport von Werkstücken
DE102004023525B4 (de) * 2004-05-13 2006-07-20 Erdrich Beteiligungs Gmbh Vorrichtung zum schrittweisen Verschieben von Werkstücken
DE102004039483B4 (de) 2004-08-14 2007-03-01 Schuler Automation Gmbh & Co. Kg Hydraulikeinrichtung
DE102015002496B4 (de) * 2015-02-27 2016-09-22 Sander Automation Gmbh Vorrichtung zum schrittweisen Vorschieben von Werkstücken

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1426039A (en) * 1920-05-20 1922-08-15 Waterbury Farrel Foundry Co Transfer mechanism
GB928719A (en) * 1959-08-24 1963-06-12 Hordern Mason & Edwards Ltd Improvements in or relating to transfer feed mechanism
DE2847273C3 (de) * 1978-10-31 1981-10-08 G. Siempelkamp Gmbh & Co, 4150 Krefeld Plattenpresse mit einer Vorrichtung zum Beschicken der Presse im Zuge der Herstellung von vergüteten Spanplatten
DE2852929C2 (de) * 1978-12-07 1984-08-09 Günter 7500 Karlsruhe Zierpka Vorschubeinrichtung in Pressen
DE3401704C1 (de) * 1984-01-19 1985-04-11 Günter 7500 Karlsruhe Zierpka Vorschubeinrichtung zum schrittweisen Material- und/oder Werkstücktransport, insbesodere in Pressen
JPS6341304A (ja) * 1986-08-08 1988-02-22 Sumitomo Heavy Ind Ltd メカニカルトランスフアフイ−ダ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG91261A1 (en) * 2000-03-11 2002-09-17 Nutek Pte Ltd Variable width conveyor
EP1336440A1 (fr) 2002-02-19 2003-08-20 Erdrich Beteiligungs GmbH Dispositif pour le mouvement des pièces avec des barres d'amenage
DE10206773C1 (de) * 2002-02-19 2003-10-02 Sander Kg Gmbh & Co Vorrichtung zum Vorschieben von Werkstücken mit Greiferschienen
US6702098B2 (en) 2002-02-19 2004-03-09 Erdrich Beteiligungs Gmbh Device to feed work pieces using gripping rails

Also Published As

Publication number Publication date
EP0633077A1 (fr) 1995-01-11
ATE150345T1 (de) 1997-04-15
ES2100594T3 (es) 1997-06-16
DE59402118D1 (de) 1997-04-24
DE4315372A1 (de) 1994-12-01
DE4315372C2 (de) 1995-03-09

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