FR2683805A1 - AUTOMATIC PALLETIZER WITH PARK FEEDING BY ELEVATOR. - Google Patents

Abstract

Device for automatically loading pallets equipped with a continuously moving elevator allowing packages to be fed at the level of the layer being built. The packages arriving on the conveyors 17 and 18 are picked up by the forks 13 - 14 passing through the fixed reception fork 15. The kinematics 1 to 12 carrying out the elevator can transfer the packages on the conveyor 16 at a variable level in time and adjustable with the level of the layer to be formed and this even during this change of level. The kinematics 22 - 23 - 24 allows the elevation of the conveyor 16, the conveyor 19 allowing the formation of the rows, the pusher 20 and the depositing plate 21.

Description

-I - "PALETTISEUR AUT Oit 7 Atique"

  with package feed by elevator. Lachine for automatic palletising of single loads

  Cartons, packs under plastic film, bags or any other overpack equipped with a continuous motion elevator for the supply of packages at the level of the layer being formed. Currently, there are different types of palletizers: For low flow rates (five cycles per minute in average IO) the palletizing robots are used. These are two, three or four axes of freedom according to

  the complexity of the diagrams to be made and comprise: one or more arrival conveyors of the products in the robot's travel zone composed of:

  I 5 mulation, a timing, a position of precise positioning where the parcel will be taken.

  of the robot by itself, with linear displacements or by rotations or linear and conjugated rotation, with its

  gripping head (gripper, suction cup) .20 One or more palletizing station where the pallets are being built.

  For high flow rates, palletisers working in complete layers are used at the level of the product (low or high level), the layer25 consists of a conveyor (s) of accumulation, abutment (s) ) of pivoting and pusher (s).

  Once ready, this layer is transferred (in general

  nal by pushing) on a layer removal tray = In the case of a low feed, this tray once loaded is first raised to high level, then transferred to the top of the pallet, then brought back to the level

deposition of the layer (descent).

  In the case of a high feed, the empty pallet is raised by an elevator just below this tray which can therefore retract when it wears a layer without having horizontal movements or

vertical to achieve.

  ^ 2- After removing a layer, the pallet elevator descends

  of a height equivalent to one layer before the tray returns to position above the pallet. Moreover, in these two cases, the layer is maintained

  Laterally by vertical shaping plates during removal from the pallet or lower layer

  (When the tray retracts). Palletizing robots and palletisers

  In the case of each package, or for each layer resulting in:

loss of time therefore of flow.

  fast alternating movements so brutal. High-powered palletizers working by

  Complete steps require the elevation of the products to a height greater than the high level of a finished pallet.

  This is generally performed by an inclined belt conveyor. They also require the pallet to be raised under the pallet before the first layer is palletized. The pallet lifter must be able to carry a pallet. These palletizers therefore have heavy and bulky structures,

  often operating in a way that is detrimental to the quality of the palletisation and the life of the appliances.

  In the patent application FR 2 499 953, the elevator described can serve from a fixed starting level, one or more fixed arrival levels also, it is not used in automatic palletizing. The elevation chains are located one behind the other with respect to the trays (carrying elements) and in the middle of one side thereof. This arrangement does not make it possible to ensure good stability of the trays. In the patent application 2,049,023, the described elevator makes it possible to serve from a fixed level starting conveyor to an arrival conveyor situated at another fixed level, each of said 7 conveyors comprising a articulated end portion allowing, during the transfer time of the load between the conveyor and the elevator platform, to match the levels of the end of the articulated conveyor and the elevator platform. In the addition request 2050 302 the starting and ending levels of the loads can only be the high and low levels of the elevator. In the patent application 2,597,454, the elevator used to bring the loads at the level of the layer to constitute IO is a device equipped with a single plate with vertical reciprocating movement. It can not therefore allow a large flow such as It allows a device with continuous movement. In patent IE P 7 II 9, a forklift moving in a closed path, translates a complete layer of product from a mandatory starting level placed high point up to the level of the deposit to be made. The present invention aims to remedy these

  disadvantages in providing palletisers running smoothly, silently and at a high rate.

  For this purpose, the palletisers made according to the invention will be equipped with an elevator which has

  continuous can take the charges at any level25 between the low and high points of the eluator and bringing them to the level of the layer being formed,

  So at a variable level in the temos The idea being to continuously bring the unit loads closer to their final position on the pallet = it is this cue-30 allows to do in part this elevator.

  A robot -muni this elevator will have only two horizontal axes robotic.

  On a palletizer working by layer and provided with this elevator, the tray will have to rise only one layer between each deposit instead of making

  upright back and forth movements.

  The elevator mainly comprises a kinematics for horizontal elevation, descent and transfer of the load support trays (square cycle). 5 of several mobile platforms supported by this * kinematics (dimension and nature adapted to the load

  transported). a set of fixed level conveyors for introducing loads into the elevator.

  Io O of a set of variable level conveyors to take into account the loads at the level of the layer in

  course of constitution. Other features and advantages will emerge from the description which follows with reference to the schematic drawings.

  I 5 attached forms representing, by way of non-limiting examples, several forms of execution of this machine

  for palletising unit loads or bags. FIG. 1 is a perspective view showing more particularly the principle of the elevator and the

  products in the palletizer.

  FIGS. 2A and 2B describe the possibilities of mounting the elevator = X to A or E or C;

  Y to A or B or a; Z to A or B or C; A to X or Y or Z; B to X or Y or Z; O to X or Y or Z.25 Figures 3 to 3 3 C and 3 D describe the cycle of palletizing.

  Figure 4 shows another use of the machine in depalletization (reverse cycle of palletization). Figures 5A and 5B show two possible tray shapes; other forms are possible according to

  the nature and dimensions of the products.

  Figure 6 shows a palletizer with a tray

  Equipped with the elevator (palletization by complete layers).

  Figure 7 shows a robot type palletizer.

  In all the forms of execution represented, and as is already known in current machines, the

  can be completed = from empty pallet dispensing and automatic pallet feed to the palletizing station of a plate interlayer distribution or from a reel between the product layers; Given the small displacements of the movable part (tray d, for example), this distribution of inserts may be integral, it will thus be closer to the final position of the spacer on the pallet. In the embodiment shown in FIG. 1, the machine is a palletizer working with a layer with the elevator supply unit. This elevator comprises the geared motor 1, giving a continuous rotational movement to the transmission shaft 2. driving the

  driving pulleys 3 and 4 in the same direction and at the same time.

  The other pulleys 5,6,7,8,9 and IO are freewheel angle references 5,6,9 and IO are equipped with

  makers. Endless belts or chains% I and 42 suppor-

  I 3 and I 4 trays are guided in their rectilinear parts.

  The number of trays will actually be a function of the flow rate to be achieved. Their size and the distance between the trays depend on the size of the loads. Their fork shape allows them to pass through the fixed fork. I 5 and through the conveyor to

  I 6 belts serving as a load extractor out of the

  levator Other forms of trays can be envi-

  depending on the nature of the products to be treated.

  The stability of the trays is ensured by the fact that they are carried by two parallel axes of articulation, de-lohgueurs and spaced a significant distance equivalent to the distance of the two upright strands or the two descending strands of the belts or endless chains -11 and I 2 haa plateau has a first articulation

  attached to the belt or endless chain -I and a second-

  articulation attached to the belt o-5 endless chain i 2 6- This arrangement as shown in Figure I allows the crossing of the uprights and trays descending without interference between them. Other embodiments of the elevator are conceivable, this being given by way of non-limiting example. The upward and downward paths of the trays are not necessarily vertical and may be inclined for particular applications. The loads are introduced into the elevator by the

  IO arrival conveyors I 7 and I 8 ensuring the timing and counting of loads.

  The IT and I 8 devices are located at the same level as the fixed receiving fork. This fork may be with a smooth lift surface equipped with free rollers or rollers or a belt conveyor similar to the conveyor. reference I. The evacuation conveyor I 6 is integral with the preparation of rows I 9 with transverse pusher 20 and the storage tray 21 All of these four devices 20 are vertically movable and their movements are controlled by the group 22 through the transmissions 23 and 24. The set of devices described above allows the products to palletize to follow the path

  next: When a package is waiting on the trans Dor-

  I 8, it can enter the fork I 5 if no load is already on this fork I 5 and if there is no risk of interference with a tray The package is then raised and removed by the first passing tray

  through the fork I 5 3 IL "pupil, translate ho-

  and then down to the point of being deposited on the

  belt conveyor I 6 which pulls it out of the elevator.

  The platform released from its load continues to descend, passes to the bottom of the elevator and is represented below the fork I 5 -The following loads occupy the trays

  following of the elevator When forming the first

  mid-layer, the devices I 6, I 9,20,2 I are at the level of

  above the empty ualette (Figure 3 A).

  7; When this first layer is finished on the pallet

  the apparatuses I 6, I 9,20,2 I rise from a height corresponding to a layer height, without the belts or chains E 1 and I 2 stopping, that is to say Without stopping the supply of parcels The palletization continues by the removal of the second layer packages (Figure 3 P) and so on until the removal of the last one.

  After this period, the apparatuses I 6, I 9, 20, 2 I may possibly be raised by a height of

  I Additional tool to allow the exit of the pallet: constituted outside the palletizer (Figure 30) This movement is not useful with certain types of palletizer, type Robot in particular After exit of the pallet full and arrival of a

  I 5 new empty pallet, all the apparatus I 6, I 9, and-

  , 2 I, goes down to the level of the top of the empty pallet, without the parcel supply of the apparatus I 6 and

  I 9 is interrupted (Figure 3 D). FIG. 4 represents a machine realizing a

  depalletization = inverse cycle of palletization Variable level conveyors I 6 and I 9 are-

  then the devices that introduce the loads into the elevator They operate in the opposite direction as well as the belts or chains markers -1 and I 2 The fork I 525 is then obligatorily equipped with a conveyor and allows with the apparatus I 8 discharge of the charges of the 1

  The loads also pass from the assembled pallet to a fixed level line conveyor.

  Figures 5A and 5B are examples

  non-limiting two forms of trays.

  FIG. 6 represents a palletizer with a delivery tray with package feed by elevator.

  It is controlled vertically by the geared motor 22. A marker device 26 may be interposed between the aircraft I 6 and I 9.

  It is usually shielded from a stop of swiveling

  to orient them differently on the pallet.

  8 - Other equipment completes this machine:

  Mapping of index layers 27, 28, 29, 30 to maintain the layer in position during the withdrawal of the tray 2 I The apparatus 3 I equipped with chains or 5 rollers door pallet being formed.

  Complementary devices are usually installed in addition to the palletizer.

  non-limiting example: double conformation allowing the maintenance of the lower layer during the deposition of a layer; automatic distribution of interleaves into sheets or from a reel, automatic dispensing

  pallet empty, evacuation and accumulation of full pallets, sizing palletized loads, strapping of layers I Figure 7 shows a palletizer Robot type with 'parcel supply by elevator A vertically referenced mobile chassis 25 carries the markers I 6 and I 9 and the palletizing robot item 32 It is controlled by the geared motor 22 The palletizing robot mark 32 takes the loads on the apparatus I 9 reference, on which they are centered unitarily or in smallness This robot will be two, three or four axes of freedom Complementary devices are usually installed in addition to the de-lettuce robot: dis-25 automatic tribution sheet interlayer or from a coil, automatic distribution, ee empty pallets, evacuation and accumulation of full pallets, sizing of loads to be palletised, strapping of layers -9 - R EVEI 4 DICATIO O IS I / Device for the automatic palletizing of unit loads, characterized in that it is equipped with a continuous-motion elevator enabling the packaging to be fed at the level of the layer being formed and composed mainly of a kinematics for the elevation, descent and horizontal transfers of the load support trays (square cycle): (I to I 2); several movable trays supported by this kinematic I-shaped, of size and nature adapted to the load carried: (I 3 and I 4); a set of fixed conveyors for introducing loads into the elevator: (I 7 and I 8); a set of variable-level conveyors to take into account the charges at the level of the layer in course of constitution = pins I 6 'and I 9; the palletizer itself with a kinematic tray

(2 I) or Robot type (32).

  2 / Apparatus according to claim I characterized in that the fixed conveyors (I 7 and I 8) for introduction of

  Loads in the elevator have any level located between the low and high levels of the elevator.

  3 / Apparatus according to claim I characterized in that aue variable level conveyors (I 6 and 19) can

  change level without the belts or chains -11 and 25 I 2 stopping, that is to say without stopping the supply

parcels.

  4 / Apparatus according to claim 3 characterized in that

  variable-level conveyors (I 6 and I 9) are de-

  vertically by the notoreducer (22) and the

  nematic (23,24) also commanding the rise of the

  layer removal tray (2 I) or the Paletti Robot-

tion (32).

  Device according to claim 1 characterized in that

  the trays (I 3, I 4) benefit from great stability

  ensured by the fact that these come out worn by two

  Parallel articulation axes of great length and spacing

  distance of the distance between the two upright strands or the two descending strands of

  belts or endless chains (1 and I 2). 6 / Apparatus according to claim I characterized in ae. that the trays have a first articulation

  on the belt or endless chain 1 and a second joint attached to the endless chain I 2 according to a

  arrangement allowing the crossing of the up and down trays without interfering with each other and thus making it possible to equip the device with a large number of trays.

  7 / Apparatus according to claims I to 5 characterized in that during the output of a full pallet and the in-

  The production of an empty pallet, the introduction of the packages on the apparatus I 6 to I 9 continues, which makes it possible to maintain the instantaneous flow rate of the machine.