FR2505214A1 - DEVICE FOR CONDUCTING PACKS OF STRIPES OF TOOL TO FEED AN AUTOMATIC STAMPING PRESS - Google Patents

Abstract

THE DEVICE INCLUDES A CONVEYOR 1 FOR TRANSPORTING THE STACKS 4 STACKED ON PALLETS 3, EQUIPMENT FOR LIFTING THE HEAD STACK 4, EQUIPMENT FOR GRABING THE BELT FROM THE TOP, AND EQUIPMENT FOR EVACUING IT TO THE PRESS. THE CONVEYOR CONSISTS OF TWO PARALLEL CONVEYORS DRIVEN SEPARATELY 1, 1, AND EACH ASSOCIATED WITH A 5 HOUR PROBE BY BATTERY 4 WHEN IT ARRIVES AT THE LIFTING EQUIPMENT. CONVEYOR 1 IS LATERAL MOBILE UNTIL THE BATTERY 4 HOURS A SIDE LIMIT SWITCH 6. USE TO POSITION THE BATTERY PRECISION BEFORE LIFTING.

Description

The invention relates to a device for

  to erode stacks of sheet metal in order to supply

  an automatic sheet stamping press for manufacturing

  cans and bottoms of cans or the like, including a horizontal conveyor for transporting stacks of sheet metal on pallets, lifting equipment for lifting the head stack, dissociation equipment for removing

  the top of the pile, and equipment for

  dissolve the separated strips of metal into the

to stamp.

  The invention is aimed primarily at supplying

  sheet metal banding of high-efficiency automatic stamping machines that manufacture lids

  and bottoms of tinplate and aluminum tin cans

  nium, but also stampings such as threaded plugs, pots of cream or the like Such presses

  are supplied with sheet metal strips which are

  from a roll by an installation

  transverse or oblique section, or from

  scissors and then stacked on a pallet, which usually receives several

  piles of sheet metal strips placed in line.

  The rate of shear that produces the ban-

  sheet metal is normally well above the machining speed of the automatic press, although a modern high-efficiency stamping machine may already

  make up to four hundred races per minute.

  Since sheet metal strips are usually manufactured in a separate cutting plant,

intermediate storage of tapes.

  For a modern stamping press

  yield, a magazine is usually

  frontally gable that can accommodate about 2300 strips of sheet metal Its filling is done by hand Vibrating vacuums dissociate the strips that are

  then pulled by feeders on a food track.

  o A ratchet slide ensures no advance

  step by step to the automatic press tools at estam-

per.

  In this system, there is a risk of

  because the magazine was not filled in time, or because the guidance of the tapes was not

  quite precise, so that failures appear.

  To reduce the enormous work involved in

  pleating of the store, a supply has already been

  semi-automatic sheet metal striping Immediately adjacent to the automatic stamping press, there is a lifting equipment, which consists in substance of a device pivotable about a horizontal axis, and intended to receive a pallet loaded with a stack of sheet metal strips This device, which, viewed from the side, forms approximately one L, can be tilted into a loading position, where the short leg of the L is substantially horizontal and serves as

  support table for the pallet Immediately afterwards, the

  The retaining device is then tilted to an oblique position where the bundle of sheet metal strips is hoisted or pulled upwardly on the long leg of the L, so that the strip is each placed forward or

  High reaches the automatic press by the advance track.

  A disadvantage of this semi-automatic

  automatic sheet metal bands is that the aforementioned restraint is designed only to receive a small pallet on which there is only one stack of bands Indeed, the necessities of production

  make it common to stack on a pallet

  mune, several piles of strips cut by shears

  But with the aforementioned device, we must then manually transfer the strips of the large pallet

  from sheet metal shears on a small pallet.

  Known devices of the kind mentioned at the beginning, which constitute to a certain extent an improvement to the installations already described Stacks of sheet metal strips are placed on pallets on a roller path which acts as horizontal conveyor The pallets are transported on this path

  rolls and stacks of strips are raised indi-

  vidually using lifting equipment

  strips are then separated and sent perpendicular

  stretching to the direction of advance of the roller path.

  It is also known, in a device of this kind, to ensure continuous operation, by already pointing down the lifting equipment when the previous pile is almost exhausted An additional restraint device

  then serves to hold the rest of the pile.

  The ability to function, and the appropriateness

  of such a routing device at a rate

  high, as required by the feeding of a

  high-performance stamping, depend on the

  reliability of the dissociation and the continuation of the

minement.

  The object of the invention is to improve the reliability

  of a routing device of the kind indicated

  at the beginning, especially with regard to dissociation.

  According to the invention, the device is characterized

  the following features: a horizontally subdivided horizontal conveyor, whose individual conveyors can be driven separately; feeler devices aligning with the individual conveyors, placed perpendicular to the direction of advance at the height of the hoisting equipment, and against which comes the stack of sheet metal bands at the head, during its progression over the horizontal conveyor;

250,521.4

  the horizontal conveyor is made so as to be able to move transversely to its direction of advance; at the height of the hoisting equipment is located on the side of the horizontal conveyor, a probe device with a fixed position, against which comes the stack of

  bands of sheet metal which is at the head when moving

  side of the horizontal conveyor.

  With the routing device according to the

  vention, it is possible to directly use the pallets lined with one or more stacks of strips at the end of the sheet metal shears. It has hitherto been difficult to do so because the piles formed after

  shears are not exactly aligned with each other

  pallets or can move when

  port to the routing device.

  The alignment of the stacks of sheet metal,

  to be as precise as possible in order to ensure

  high reliability at dissociation, encounters significant technical difficulties For reasons of economy of material, the strips are usually cut, with a width which leaves only one millimeter edge left for stamping. We will understand

  therefore any small deformation of the bands may

  disturbances in the manufacture of

  On the other hand, the stacks of strips have a significant weight, so that they can hardly be moved to align them. Nevertheless, the routing device according to the invention allows accurate alignment by means of a horizontally subdivided horizontal conveyor, which ensures alignment of the entire pallet on the horizontal conveyor so

  that the head stack is exactly aligned parallel-

  The exact lateral alignment of the head stack takes place surprisingly simply by lateral translation of the horizontal conveyor.

  during the latter, the stack of tapes hits a

  the lateral positioner mounted on the side of the conveyor In practice, the position of the con-

  horizontal voyeur will be the most distant extreme position

  The stack of bands is then safely driven against the devices

  front sensors while passing in front of the pal-

  Lateral fear After alignment with the border probes

  the horizontal conveyor belt undergoes a trans-

  in the direction of the lateral feeler device

  than the latter, hit by the stack of tapes,

interrupt this lateral movement.

  This alignment of the stack allows dissociation

  bands when there is not too much

  irregularities in the battery itself If the batteries

  such irregularities, it is

  to provide a lateral piston that is vibrated

  and press against the battery This pressure does not apply

  only at the top of the pile With the vibrating piston, it is sufficient to exert a reduced thrust on the bands, especially as the piston only acts on those

  from the top who have only their own low weight to move

  The sheet metal bands therefore remain assured no

  deformed, and they can be perfectly dissociated.

  Dissociation can be done in a particular way

  reliably by gripping the upper band by suction cups or magnets, and pulling it straight up through a smaller opening frame

  that a corresponding dimension of the sheet metal strip.

  This dissociation equipment, known in other fields of the art, can only be used with

  stacks of sheets carefully aligned.

  The frame with the smaller opening can

250521 4

  preferably be formed by two claws placed opposite one another on the long sides of the sheet metal strips These, grasped by the suction cups or magnets, therefore only strike the claws by their long sides, and under the suckers or magnets, they are bom-

  slightly upwards, which produces the disso-

ciation.

  For this particular provision, it is

  to provide for the alignment of the upper part

  top of the pile, two vibrating pistons in front of which

  there are two stops against which the

  This is so effective that it is frequently sufficient, without particular alignment of the battery, to allow a proven dissociation by means of

  for example the frame device or claws.

  Other peculiarities and advantages of

  The invention will become apparent from the following description.

  In the accompanying drawings, given by way of non-limiting example: a conveyor belt detail of

  FIG. 1 is a side elevational view of

  routing device according to the invention; Figure 2 is a top view of the horizontal; Figure 3 is a representation of a dissociation equipment; Figure 4 is a dissociation element; Figure 5 is one of the alignment device for the sheet metal stack; and Figure 6 is a

alignment tool.

  Figure 1 shows a set of motor rollers 2

top view of the equi-

  detail representation the upper part of

view from above of

  Horizontal conveyor 1, aligned next to each other The horizontal conveyor 1 serves to propel a pallet 3 on which there are piles of

sheet metal strips.

  The pallet is propelled by the horizontal conveyor 1 until the stack of sheet metal bands at the head meets at least one of two feeler devices 5 constituted by end-of-travel switches. the

  horizontal conveyor 1 is, in the direction of

  port, formed of two individual conveyors 1 ', 1 "which perform the alignment of the head stack 4 If for example it abuts first by its left side against the sensor device 5 on the left, the conveyor

  1 'of the horizontal conveyor is turned off.

  cooked, while the individual conveyor of right 1 "continues its transport The pallet 3 thus takes an oblique position until the right side of the pile

  of strips 4 stops against the right probe device.

  It is thus possible to align the head stack 4 transver-

  badly to the management of the long-term conveyor

dinal 1.

  As also shown in Figure 2, another probe device 6 is provided laterally The horizontal conveyor 1 can move laterally in its horizontal plane, and this in the direction of the probe device 6 placed laterally fixed station The progression of the pallet 3 is made therefore always so that the head stack 4 is moving against the front feeler devices safely passing in front of the lateral feeler device 6 When the alignment on the front feelers has taken place, all the horizontal conveyor moves sideways until that the stack of strips 4 strikes the lateral probe 6 It is then obvious that the stack of head 4 is perfectly aligned on the conveyor

  horizontal 1, and this by positioning the pallet 3.

  It is understood at this stage that the feeler devices 5, 6 may consist of switches

  but also in electronic equipment

  optical, such as light barriers or

  gists. At the rear of the front feeler devices is a vertical slide 7 on which

  to slide support arms 8 These are

  formed so as to be able to penetrate the pallet 3 constituted accordingly, and to seize from below the

  pile of head 4, which they raise then.

  In Figure 1, the state of the instru-

  at a time when the stack of sheet metal strips 4 has already been lifted, while a residue 10 of the previous stack is retained in a retaining device 9 located above it The latter comprises retaining arms that can be moved hydraulically, which unfold only when the stack of strips 4 has been operated except for a residue 10Afterwards, the carrying arms 8 can lower and seize by

  below the next stack of tapes after alignment.

  Against the upper part of the pile 4 or the residual pile 10 is applied a piston 12 which is vibrated by a cylinder 13 This piston 12 causes the alignment of the highest sheet metal strips in the residue 10 or in Of course, a similar piston can be placed on one side of the residue 10 or the neighboring battery 4, and cause the alignment of the highest bands in the direction perpendicular to

that of the first piston 12.

  The removal of the band from the top of the residual pile 10 or the stack 4 is done by means of a hydraulically actuated suction cup 14 which attracts the upper band against the bottom strand of an endless conveyor belt. 16, against which the strip in question is also maintained by depression or by magnetic effect if the belt 16 is magnetized

  and if the sheet metal strips are of ferromagnetic material

  There are drive lugs 17 on the belt and they suck the sucked strip out of the suction cup 14. FIGS. 3 and 4 show additional equipment for dissociating the sheet metal strips. The upper edge of the residual pile 10 or stack 4 is in a frame 18 comprising

  four guides 19 which, going upwards,

  The upper band, gripped by the suction cup, is pulled through a narrower opening between the guides 19, and must therefore deform elastically. It is thus ensured that they are not two adhering strips. to one another which are drawn

  upwards by the suction cup 14 through the frame 18.

  FIG. 4 shows this arrangement with three suction cups 14 connected together by means of a plate of

link 20.

  Figure 5 illustrates in more detail the alignment

  the upper part of a stack of unordered sheet metal strips 4, by means of the piston 12 which is actuated by a vibrating cylinder 13 A stop 21 serves as a counter-support for the piston 12 FIG. two cylinders 13, 13 'and pistons 12, 12' connected together and actuated via a common cylinder 22 Figure 6 shows the alignment device in the rest position For alignment,

  the cylinder 22 is actuated to advance the cylinders

  13, 13 'and the pistons 12, 12' in their working position, which is shown in FIG.

  and shown in phantom lines in FIG.

  The cylinders 13, 13 'are pneumatically powered so as to effect a vibratory movement. Thus, the pistons 12, 12' align the upper part of the stack of belts 4 by pressing them in small portions. rapid blows against the stops 21, 21 'When the cylinders 13, 13' and the pistons 12, 12 'have been sufficiently pushed forward by the movement of the common cylinder 22 to perform the alignment, this is noted by a probe with induction 23 which controls the withdrawal of the entire device by actuating the cylinder 22 in the output position So that the probe 23 can recognize the position of the cylinder 13, it is provided with an extension 24 which is just in front of the probe with induction 23,

in the alignment position.

  It is therefore a slow and continuous movement caused by the cylinder 22, on which is superimposed a movement

  vibration produced by the cylinders 13, 13 ', which leads

  align with the top of the stack

sheet metal strips.

he

Claims (3)

  1 Device for conveying piles of   sheet metal strips (4) for feeding an automatic press   sheet stamping machine for making lids and bottoms of cans or the like, comprising a horizontal conveyor (1) for conveying stacks of sheet metal strips (4) placed on pallets (3), equipment lifting means (8) for lifting the head stack (4), dissociation equipment (14,19) for removing the top band of the stack (4), and equipment (16) for discharging the dissociated sheet metal strips to the press   automatic stamping, characterized by the   the following: a horizontally subdivided horizontal conveyor (1), the individual conveyors (1 ', 1 ") of which can be driven separately, and probe devices (5) aligned with each other;   the individual conveyors (1 ', 1 "), placed perpendicular   stretching in advance direction at the level of the equi-   lifting element (8), and against which comes the stack of sheet metal strips at the top (4) during its progression on the horizontal conveyor (1); the horizontal conveyor (1) is made of   way to move transversely to its direction   in advance; and at the height of the lifting equipment (8)   located on the side of the horizontal conveyor, a   probe (6) with fixed station, against which comes the stack of sheet metal strips (4) which is at the head, when   lateral displacement of the horizontal conveyor (1).   2 Device for conveying piles of   sheet metal strips (4) for feeding an automatic press   sheet stamping tick to make lids   and bottoms of cans or the like,   taking lifting equipment (8) to lift a   stack of sheet metal strips (4), dissociation equipment   14,19) for removing the upper band of the stack (4) and a device for discharging (16) the dissected sheet metal strips to the automatic stamping press, in particular according to claim 1, characterized in that at the level of the dissociation equipment (14) is placed a vibrating piston (12) pressing against the   upper part of the stack of sheet metal strips (10).   3 Routing device according to the   cation 1 or 2, characterized in that, in the dissociation equipment, the upper sheet metal strip is grasped by suction cups (14) or magnets, and drawn straight upwards through a frame (18), smaller opening   that a corresponding dimension of the sheet metal strip.