FR2605999A1 - APPARATUS FOR STACKING STACKABLE OBJECTS ON A CHUCK - Google Patents

Abstract

THE APPARATUS FOR STACKING STACKABLE OBJECTS ON A CHUCK, INCLUDES A CHUCK 20 TOWARDS UPWARDS CARRIED BY A CHUCK SUPPORT 22, AND MEANS 16 FOR MAKING STACKABLE OBJECTS 32. IT ALSO INCLUDES MEANS 28 ALLOWING AN INTERRUPTION OF THE NORMAL STACK WITHOUT LOSS OF CYCLE INCLUDING A STACKING PLATE FOR INTERRUPTION PERIOD 34 AND A SUPPORT FOR INTERRUPTION PERIOD 40 MOUNTS TO COME ACCORDING TO A BETWEEN MOVEMENT BETWEEN THE 20 DOOR CHUCK THROUGH THE CHUCK SUPPORT 22 AND THE DEVICE FOR DELIVERING THE OBJECTS 16, SO THAT THE OBJECT 32 IS RECEIVED ON THE MEANS 28 ALLOWING AN INTERRUPTION OF THE NORMAL STACK WITHOUT LOSS OF CYCLE ACCORDING TO A PREDETERMINED FREQUENCY. USE FOR STACKING STACKABLE OBJECTS ON A CHUCK SUCH AS POUCHES.

Description

The present invention relates to an apparatus for stacking objects

  stackable on a mandrel, and in particular an apparatus of this type

  interruption of the normal stack without loss of cycle.

  It is known to use, for the manufacture of objects, for example plastic bags or sections of web which are then transformed to produce bags, an accumulator of objects by stacking on mandrel, which makes it possible to stack objects so

regular.

  Such a mandrel stacking apparatus is known from U.S. Patent No. 4,573,955 to MORY et al. The typical mandrel stacker uses circumferentially spaced arms that extend radially to transport the objects of the forming machine to the stacking station, which includes pins or posts

  protruding upwards and connected to the support plate.

  Support plates are attached to an evaluation mechanism

  cuation such as a chain conveyor that carries an entire stack of objects and places an empty support plate,

  with chucks raised upwards and empty, in posi-

  under the arms put on hold to collect a stack of objects on the newly placed support plate

in place.

  The stacking machine is well known

  normal, which constitutes the basic context of the improvement provided by the device according to the invention. One of the difficulties encountered in conventional mandrel stackers is that it is difficult to maximize the production of the bag making machine due to the time constraint imposed on the bag machine while the stacker is putting into operation. places a support plate with an empty mandrel at the outlet of the bag-making machine. In the past, it was necessary to interrupt the production of the machine for at least several cycles while placing an empty support plate. Another way of adapting to the waiting time required for setting up an empty stacking plate was to operate the machine to make bags or objects at a rate below the maximum capacity of pouches, thus adapting to the capacity of the stacking station. None of these two solutions correspond

  to an efficient use of the machine.

  The object of the present invention is to overcome the drawbacks of known systems and to provide an apparatus for temporarily accumulating objects on mandrels while placing an empty stacking mandrel support in position for receiving

  objects in a conventional way.

  The apparatus for stacking stacked objects

  on a mandrel according to the invention, comprises an upright mandrel carried by a support of

  mandrel, and means for bringing stackable objects.

  According to the invention, it is characterized in that it comprises means allowing an interruption of the normal stack without loss of cycle including a stacking plate for interruption period and a support for interruption period mounted for reciprocatingly in position between the mandrel carried by the mandrel support and the device for bringing objects, so that

  the object is received on the means allowing a

  rupturing normal stacking without loss of cycle

  according to a predetermined frequency.

  It is thus possible to interrupt the stack

  objects on a solid mandrel stacking plate for the time required to set up a new empty mandrel stacking plate, without interrupting the machine for producing the objects, which are during this time temporarily accumulated on a stacking plate

for interruption period.

  According to a first embodiment of

  the invention, the stacking plate for a period of

  includes a cross-section

  born to support the object outside the mandrel of

said plate.

  Objects can thus be effectively supported

  cabling on both sides of the plate chuck

  Stacking for interruption period.

  According to another embodiment of the invention,

  In this way, the mandrel of the stacking plate for interruption period comprises several elements

extending upwards.

  Objects can be more regularly

  stacked on the stacking plate.

  According to another embodiment of the invention,

  vention, the support for interruption period is

  equipped with several openings and a source of vacuum.

  Stacked objects can now be

  naked firmly on the stacking plate and support

for interruption period.

  According to a preferred embodiment of the invention,

  vention, the mandrel support is located laterally

  inside the support for interruption period.

  Such an arrangement facilitates movement

  vertical back-and-forth of the support for period of in-

  and the collection, on the mandrel of the new mandrel stacking plate, of objects accumulated on

  support for interruption period when this last

  deny is lowered when normal stacking resumes.

  Other peculiarities and advantages of

  will still appear in the description below.

after.

  In the attached drawings, given as examples

  non-limiting plies: Figure 1 is an elevational view showing a conventional bag-making machine and mandrel stacking plates on an endless conveyor; 20. Figure 2 is a diagram of a chuck production station on which bags are stacked; Figure 3 is a diagram of a temporary accumulator in operating position; 25. Figure 4 is a diagram of an accumulator

temporary full.

  Figure 1 shows the generic configuration

  of the invention. This is, in general, a bag-making machine, typically shown at 10, having a sealing and cutting head 12 and an evacuation device 14 which will bring the manufactured objects, for example sachets,

  transfer means, indicated generically

  16 are provided with circumferentially spaced radially extending arms such as 18. These arms are suction arms which will hold both ends of the bag or object on the arms after the object has been taken. The objects are held by the arms until they are threaded onto the mandrels such as in a conventional manner. The mandrels are carried by supports such as 22 on an endless conveyor 24. The objects are unloaded from the mandrel supports at any point located between the arms 18 and the drive device of the supports

  mandrels, indicated generally in 26.

  The means for interrupting the normal stack without loss of cycle, indicated generally at 28, are installed at the loading station at the location 30 of the first normal stacking support and will operate to accumulate objects brought at the location 30 of the first stacking support. Means for a lossless cycle interruption 28 may be driven by

  well-known conventional means, including

  swimwear and straps, to be in position after a given number of objects has been brought by the means

  transfer 16 to the first stacking support.

  Figures 2 to 4 are a better representation of the

  means for interrupting without loss of cycle generally indicated by 28. These

  Figures are schematic representations of the

  which can be designed in a variety of ways, eg with cam drive, belt drive,

  synchronization, by gearing or other suitable means

  tional. The means for cycle-free interruption, generally indicated at 28, are located at the location of the first stacking support, wherein the mandrel support 22A is being loaded with objects supplied by them. transfer means generally indicated at 16, and in particular by the arms 18. The object 32 is, for example, a bag which has been provided at one of its ends with the left end in FIGS. 4, an opening or a set of openings. The bag is

  held on the arms 18 by vacuum suction during

  the arms bring the bag onto the mandrels 20 of the mandrel supports such as 22A. Several bags 32 have accumulated on the mandrel support 22A in FIG. 2, and when a predetermined number of sachets have accumulated on this support, the means allowing an interruption without loss of cycle, indicated generally at 28, will be brought into position to accumulate bags while the continuous conveyor moves the mandrel support 22A to an inoperative location downstream of the normal stacking station. The means allowing an interruption of the normal stack without loss of cycle were, in Figure 3, placed in position to receive the next bag 32 which is brought by the arms 18. The stacking plate for interruption period 34 is provided with a mandrel portion 36 and a transverse arm portion 38. The mandrel portion 36 acts as the mandrel 20 of the stack support 22 and will be introduced into the opening of the bag 32 when the plate Stacking for interruption period 34 is raised by its mechanisms in position above the mandrel 20 of the normal stacking plate. The transverse arm portion 38 of the interruption period stacking plate 34 supports the portions of the

  bag 32 located outside the opening or po-

  of the bag when the bags are impaled on the

mandrel 36.

  A support for interruption period 40, which may be a tubular element, comes at the same time.

  time that the stacking plate for period of inter-

  ruption 34 in position inside the adjacent arm 18

but outside the support 22.

  The bag 32 is then carried by the stacking plate for interruption period and the support

  for interruption period 40 for several

  the arms 18 and during the stacking of a given number of bags 32 on the stacking plate 34 and the support 40 for interruption period. During the interruption of the normal stack, it is possible to move the solid support 22A and take it out of the normal stacking location, and a mandrel support is brought

  empty such as 22B in the normal stacking position.

  The position shown in dashes in Figure 1

  represents the stacking plate for period of inter-

  ruption 34 and the interrupt period support 40 in position to receive the first bag 32 at the

figure 3.

  FIG. 4 shows the interruption period stacking plate and the interruption period support 40 fully loaded with bags 32 and

  the support 22B ready to start receiving sachets.

  At this moment, the stacking plate for period

  interruption 34 and the support for interruption period

  40 will be quickly lowered so that the bags are impaled on the mandrel 20 and rest on the support 22B. Means for interrupting the normal stack without loss of cycle, indicated

  in a general way by 28, will now be

  worm unused until a preset number of pouches have accumulated on the normal stacking mandrel support 22B, the cycle then being repeated. The interruption period stacking plate 34 can be actuated at the same time as the interruption period support 40 by means of an articulated connection by means of a pneumatic jack 42 (FIG. 1, not shown in FIGS. 2 to 4 by clarity) or other well-known mechanical device for soliciting an organ from a location up to

another location.

  The dashed drawing in FIG. 1 represents the interruption period stacking plate 34 and the interruption period support in their upwardly deployed position in which they

  receive sachets as shown in Figure 3.

  The normal position of the means allowing an interruption

  normal stack without loss of cycle, indi-

  in a general way in 28, is the position

represented in solid lines.

  An alternative embodiment of the interrupting stacking plate comprises a single upstanding mandrel similar to the mandrels 20 of the supports 22. As long as the opening in the bags is adaptable to the mandrel of the plate

  stack and the mandrel of the stack plate

  For periods of interruption, almost any form of mandrel can be used. The two upwardly projecting grids shown in Figure 1 are simply one possible embodiment. Another variant embodiment uses a

  support for a modified interruption period, on the

  upper face and possibly to the outer surface

  of which several openings are provided, one

  source of vacuum connected to the support for a period of

  ruption provided with openings helping to maintain the first bag on the support for interruption period when the means allowing an interruption of

  Normal stacking without loss of cycle is required.

  cited initially to their reception position.

  Even if the best intended embodiment of the present invention has been shown and described, it is understood that modifications can be made to it.

  tions and variants without departing from the scope of the invention.

tion.

Claims (5)

  An apparatus for stacking stackable objects on a mandrel, having an upright mandrel (20) carried by a mandrel support (22), and means (16) for feeding stackable objects (32), characterized in that it comprises means (28) for interrupting the normal cycle-loss-free stack comprising an interrupt period stacking plate (34) and a period carrier   interrupters (40) mounted to come according to a movement   reciprocatingly in position between the mandrel (20) carried by the mandrel support (22) and the device (16) to bring the objects (32) so that the object (32) is received on the means (28) allowing an interruption of the normal stack without loss of   cycle according to a predetermined frequency.   Apparatus according to claim 1, characterized in that the interruption period stacking plate (34) comprises a forming portion   cross-member (38) for supporting the object (32) at the   the mandrel (36) of said plate (34).   Apparatus according to claim 2, characterized in that the mandrel (36) of the interruption period stacking plate (34) comprises   several elements extending upwards.   Apparatus according to claim 3,   characterized in that the support for period of inter-   ruption (40) is provided with a plurality of openings and a vacuum source.   5. Apparatus according to claim 4, characterized in that the mandrel support (22) is located laterally inside the support for interruption period (40).