FR2471918A2 - METHOD AND DEVICE FOR OPENING AND PRESENTING A BAG PROVIDED WITH AN INPUT AT ITS UPPER EDGE AT A FILLING CANNULA - Google Patents

Abstract

THIS PROCESS, WHICH IS DESCRIBED IN THE MAIN PATENT, IS FURTHER CHARACTERIZED IN THAT WHEN THE HANDLING ORGANS 7 ARE AT THE OPENING STATION, THEIR ENDS 14 WHICH FORCE ARE CLAMPED AND ARE FOR THIS EFFECT EQUIPPED WITH JAWS 9, 10 PIVOT TOWARDS THE EXTERIOR IN RELATION TO BAG 6 ONCE IT HAS BEEN GRABBED BY THE SUCTION RAMPS 20, 21, THEN AFTER THE SAID ENDS 14 HAVE PIVOTED BEYOND THE AREA OCCUPIED BY THE BAG TRANSPORTED TO THE OPENING STATION , THE GRIPPERS ARE RETURNED TO THE TRANSFER STATION TO GRAB A NEW BAG.

Description

247 191 8

  The subject matter of the main patent is a process for or

  screw and present to the filling cannula a

  Cheuse a prefabricated bag & provided with an entry at its upper part. In this process, the bags are taken one by one by means of two gripper-shaped gripping members capable of pivoting on a horizontal axis, which are seated

  each the bag to be removed from side6 by its long edge.

  nal corresponding legereent set back from its entry and transport it to an opening station, in which it is opened by suction ramps, after which it is supported by two spreader fingers mounted on respective pendulum supports parallel to each other ,

  can be placed using these supports and able to pivot each

  cun on a vertical axis- which engage in the op-

  placed from the center and transport the bag to the

  the filling0 the bozds of its entry then being applied against the lattero We know for example a device in which plastic bellows bags, arranged in a

  layer in which they are nested, i.e.

  rigged lengthwise and which is rolled on itself to form a reel are after being taken one by one9 transferred to a table and entered at

  tour of rale by pairs of pliers which, during the follow-up

  te of the work cycle0 while the product to be bagged is poured into a bag, maintain the latter by its

closed side gussets.

  The bag thus held by the pairs of pliers can only partially open, so that its entry is relatively small and it is impossible to reach an optimal bagging capacity and

  You cannot get key bagging capabilities.

  ves when filling bellows bags than when

  they present to the cannula an inlet which extends over all

  te their section and that the spill section of the car

nule is large in proportion.

  The object of the invention is therefore to develop the pro-

  assigned and the device according to the main patent so that in the case of bellows bags, their grip by the

  opening post is perfectly safe, they can be-

  be completely open and give the cannula a sec-

  optimal free action for spilling the product to be bagged. To this end, in the method according to the invention,

  when the gripping members are at the opening position

  re, their ends provided with pivotal clamping jaws

  tent outward relative to the bag once this

  it was seized by the suction bars, then, after the said ends have pivoted at least beyond

  the area occupied by the bag transported to the opening station

  re, the gripping organs are brought back to the post of

  transfer to grab a new bag.

  Thanks to the outward pivoting of the ends of the gripping members after the suction bars have grasped the bag at the opening station, first of all a sufficient free space is obtained to open the inlet of the bag as much as possible using the side bellows. Then, as the gripping members are brought back to the transfer station with their ends thus separated, they cannot, on their course, collide with the bag which hangs freely at the opening station and detach it from the ramps

suckers.

  Anyway, the invention will be well understood at 1 '

  using the following description, with reference to the drawing

  schematic annexed, representing, by way of example not bound

  mitative, an embodiment of this device: FIG. 1 is an elevational view of the cannula of

  filling of a bagging machine and the as-

  company for the opening and presentation to the cannula of a bellows bag;

  Fig. 2 is a plan view of the gripping members;

  sion which transport the bag to the opening station, as well as the suction station ramps and their drive means; Fig. 3 is a plan view of the spreader fingers which grip the bag at the opening station and bring it to the

filling cannula.

  The bagging machine 1 is provided with a filling cannula 2, which is equipped with spacer flaps 3 and clamping jaws 4. The latter have the role of immobilizing the bag, the upper edge of which is threaded

on shutters 3 closed.

  In a transfer station 5, a bellows bag la-

  6 is gripped by two gripping members 7,

  tees so that they can pivot on a horizontal axis 8.

  The gripping members 7 grip the bag 6 by their

  jaws 9, 10, set back from the upper edge which delimits

  the entrance to the bellows area, one of the 10

  choires being mounted at the free end of the rod

  tone of a clamping cylinder 11. The other jaw 9 is formed

  led by a wing of the profile of a U-shaped part 12, the other

  the wing is fixed to the cylinder of the jack 11. The U-shaped part 12 and the jack 11 together form the free end 14 of each gripping member 7, an end which can pivot around an axis 15 relative to the body 16 of the said organ

  between a position in which it is in the a-

  alignment of this body and a position where it is inflected

  shit outward. This last position is represented

  line in Figure 2. The pivoting of the end

  free mite 14 of the gripping members around the axis 15 is obtained by means of a jack 17, the piston rod 18 of which is articulated on an arm 19, which extends laterally from the end 14. This lateral arm 19 is provided in the region of the articulation between said end 14 and the body 16 of the gripping member. The gripping members 7 have the role of grasping a bellows bag at the

  transfer station and transport it to the opening post-

  re by pivoting around axis 8. At the opening station, the

  upper edge of the bag, which protrudes from the gripping organs

  upward, takes a central position between two

  suction bars 20 and 21, which grab the bag, pre-

2471 918

-4

  thus taking over from the gripping organs 7. These ram-

  pes suckers 20, 21 move at the same time and at the same time

  speed in reverse from each other from the

  median plane 22 of the opening station.

  S -After the bag has been gripped by the suction ramps 20, 21 and before the opening movement thereof, the ends 14 of the gripping members 7 pivot

  outwards around axes 15 under the action of

  rins 17. This outwardly bent position of the ex-

  tr6mités 14 is shown in phantom in Figure 2 and we can see that it allows full deployment

  side bellows of the bag during the opening movement

  re ramps 20, 21, and thus give the largest possible cross-section at the entrance of the bag. The ends 14 do not

  absolutely not likely to come into contact with a

  any tie of it. They remain in this posi-

  tion while the gripping members 7 return to the transfer station. On their journey, they are not likely to come up against the bag which hangs freely at the

opening post.

  At the transfer station, the pivoting ends 14 are brought back into alignment with the body 16 of the respective gripping member, before the jaws grip

a new bag.

  The suction bars 20, 21 are moved in opposite directions to each other by a motor system associated with a coupling mechanism. As a motor system, a jack 23 is mounted, mounted below a support 24, on which the guide means for the ramps are provided.

20, 21.

  The coupling mechanism mounted between the ramps

  , 2I and the actuator 23 has a stock 26 mounted at low

  vote on a vertical axis 25, at the ends of which

  the articulated bieilettes 27,28, which.are.articulated

  on the ramps 20, 21 or parts integral with them

  this. The butt 26 is linked to a lug 29, on which a-

git the piston rod of the cylinder 23.

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  On the ramp 20, located on the side facing the cannula 29 is fixed a U-shaped bridge 309 which spans the other ramp 21 and which is via a wing

  vertical 31, is connected to the coupling mechanism, no-

  as a link 28o On the vertical wing 31 which extends the bridge 30 are fixed guide rods 32 for the ramp 20o These

  rods are slidably mounted in sleeves 33 fi-

  born in 24o support The link 27 leads to a piece

  rail of the ramp 210 When the actuator 239 is actuated

  the coupling mechanism which has just been described trans-

  sets the movement so that the two ramps 209 21 move in opposite directions to each other. The guide means placed on the support 24 for the suction boom 21 are constituted by rods ___ which slide in sleeves 35 These are fixed on the support 240 The e2: rear hoppers of the guide rods are connected to each other by a crosspiece 369 which presents in its

  middle a tap hole for a screw 37 forming a stop

  2o adjustable and cooperating with a fixed stop 38 at the end of the

  rampso stroke Screw 37 allows you to adjust the am-

  fullness of the movement of the rampso A linkage 39 allows the position to be adjusted

  height of the support 24 and therefore of the ramps. 209 21 by pivo-

  Tely around the axis 8o After opening the bellows bag 6 by the suction rails 20,! 2, plates 40 of the spacer fingers 41 are introduced into the inlet of the bag and pivot outwards under the action of an X3 cylinder Once the spreader fingers have taken hold of the bag, the ramps 20, 21

  are moved upwards by the linkage 39 and take

  thus the position shown in phantom in figure

gure 1

  The spacer fingers 41 are articulated at supports

  oscillating ports 44,45 and moved to the cannula 2 by means of a jack 46. Another jack 48 makes the

  fingers 41 around a horizontal axis 47.

Claims (12)

R- CLAIMS -   1.- Method according to claim 1 of the main patent, characterized in that when the organs of   gripping (7) are at the opening station, their extremi-   tees (14) which form a clamp and are therefore provided with jaws (9,10) pivot outwards relative to the bag (6) once the latter has been gripped by the suction bars (20,21) , then, after said ends (14) have pivoted at least beyond the area occupied by the bag transported to the opening station, the   gripping are brought back to the transfer station to get Sir of a new bag.   2.- Method according to claim 1, characterized in that at the transfer station, the pivoting ends   (14) gripping members (7) are brought back into the a-   alignment of the remaining part (16) of these organs.   3.- Method according to claim 1 or the resale   dication 2, characterized in that the bag (6) is brought by the gripping members (7) in the median plane (22) of the opening station and in that for the opening of this bag, the suction bars ( 20,21) move at the same time and at the same speed in opposite directions from each other from of this midplane.   4.- Device for implementing the process   according to any one of claims t to 3, character-   laughed in that the ends (14) of the gripping members   sion (7) which are provided with jaws (9,10) are also   each provided with a jack (11), the piston rod of which   your mobile jaw (10) forms at its free end,   and are mounted on the rest (16) or body of said organ-   nes so as to be able to pivot outwards on an axis (15) perpendicular to the pivot axis (8) of the gripping members, under the action of a jack (17) articulated on the body (16) thereof.   5.- Device according to claim 4, character-   laughed at in that the pivoting end (i4) of each member   gripping (7) is provided, in the area of its articula-   tion on the remaining part (16), of a lateral arm (19), on which is articulated the piston rod of the jack (17 'which ensures pivoting.   6.- Device according to claim 3, characit-   ris6 in that the displacement of the suction bars (20,213) in opposite direction one of the other is ensured by a member   motor with which is associated wm Coupling mechanism.   7.- Salt device., Claim 6, character-   ris6 in that the drive unit is a vria (23) located   underside of a support (24) for the y; ramps (20,21).   8.- Device according to claim 6 or the re-   vendication7, characterized in that the delivery mechanism   plement has a stock (26) mon-t9k pivoting on   a vertical axis (25), at the ends of which is articulated   cul-de-rods (27,28) themselves articulated on   the ramps (20,21) or parts integral with the latter   res, and in that the piston rod of the cylinder (23) which   moves the motor member acts on a lug (29} integral with the butt (26).   9.- Device according to claim 7, character-   ris6 in that the means of uiclagp: strt constituted by a sliding rod in a mai.nc 'fixed & on the support   (24) and in that the path of the ramps CaO21) is limited head by an adjustable stop.   10.- Device according to claim 9, character-   ris6 in that the ends of two guide rods (34) associated with a suction ramp (21) are connected to each other by a crosspiece (36) provided with a tapped hole for a screw (37) which forms the adjustable goal and cooperates   with a fixed stop (38) at the end of the ramp travel.   11.- Device according to 'any of the revTendi-   cations 4 to 10, characterized in that the ramp (20) turns   born towards the cannula (2) is connected to the coupling mechanism-   ment by a U-shaped bridge (30, which spans the other ramp (21), and by a vertical wing (31 "which extends this bridge.   12.- Device according to claim 11, character-   rised in that the guide rods (32 ′ associated with the ramp (20) facing the cannula are fixed to the wing vertical (31).