ES2338230T3 - DEVICE TO AVOID THE FLEXION OF THE MAIN AXLES FOR APPLICATION IN CARTON PROCESSING MACHINES OR OTHER MATERIALS. - Google Patents

Abstract

A device for application to operating machines for processing paperboard or corrugated paperboard or other materials in sheet or strip form, and designed for preventing main shafts of said machine from bending, is characterized in that said device comprises a supporting bar for the shaft supporting assembly, which supporting bar is arranged in a longitudinal direction, with respect to the paperboard material feeding direction, and being supported by cross members in turn applied, at their end portions, to the main shoulders of the machine, and at the central part thereof being supporting by supporting uprights and elements bearing on the floor.

Description

Device to prevent shaft flexion Main for application in cardboard processing machines or other materials.

Background of the invention

The present invention relates to a device designed for application in functional machines to process cardboard or other materials, in sheet or strip form, which is adapted to avoid bending of the functional axes main, such as counterprehension axes, counter cut and contrahendido, respectively.

It is known that, mainly in machines designed to process corrugated cardboard of a substantial width, the main functional axes mentioned above are seen subjected to natural bending.

This one is more sensitive in the center of the strip cardboard and is caused by the weight of the functional axes that hold the related functional disk elements.

This inconvenience is further aggravated during the cardboard material processing, due to efforts exerted on a large number of different points of the axes functional by the cardboard material being manipulating or processing.

More specifically, the cardboard material applies said processing resistance against disk elements of countercut, counterprehended and counterfeited sustained by cited main functional axes.

The manipulators or processors of cardboard of the prior art and, in particular, the machines available to process corrugated cardboard, which are designed to handle cardboard strips of comparatively large width, are affected by major functional problems, to consequence of the bending deformations mentioned above of the main functional axes.

These inconveniences affect operations prehending, cutting and creasing so negatively that, in the end of the processing procedure, the corrugated cardboard that is being processing will have, in many of its parts, different values of depth.

In particular, corrugated cardboard material it will have, in its center, parts pre-attached and split to different depths, which will adversely affect subsequent folding operations to form, for example, boxes, particularly in automatic systems to pack products in cardboard boxes.

The drawback mentioned above is can compensate using major functional axes of greater diameter and thickness, which, however, will have a greater weight, which at in turn aggravates the problem of flexion mentioned above.

In addition, the largest diameter of the axes it would lead to an increase in the diameter of the processing discs, with the consequent increase in the distance of the axes, and, therefore, of the minimum length of the sheet to be handled.

In the document EP-A-0575265, a device to limit the deflection of an axis in response to the changes of tension in a leaf that passes making contact with the axis.

Summary of the Invention

Accordingly, the present invention has in order to overcome the aforementioned problems, providing a device specifically designed to avoid the flexion of the main functional axes, which is very simple from the constructive point of view and that can be applied Quickly to the cardboard material processing machines already existing.

The object mentioned above, as well as other objectives, which will be more evident from the This description is achieved by a device according to the claim 1.

In the dependent claims are defined other features of the device of the invention.

Brief description of the drawings

The device features according with the present invention mentioned above, and others, will appreciate more clearly after the following description detailed, in which reference is made to the figures of the attached drawings, in which:

fig. 1 is a general schematic view of the machine according to the invention;

fig. 2 is a side view of the machine that is shown in fig. one;

fig. 3 is another side view illustrating the device designed to prevent flexion of functional axes main;

fig. 4 is an elevation and section view illustrating a detail of the device of the invention;

fig. 5 shows a detail of a bar support of the axle support device, with a linear guide related to sustain a sliding block mechanism or shoe Y

fig. 6 is a top floor view and in section of a slide block detail, applied to the device  of figure 3.

Description of the preferred embodiments

Referring to Figure 1, it is shown, of schematic way, a functional machine 100 to process cardboard corrugated, to which the device should be applied according to the present invention

More specifically, Figure 1 shows said 100 functional machine to process a corrugated cardboard material 81, and said machine comprises cutting blades 78, which are rotatably driven by motorized shafts.

In addition, some tapes are provided conveyors 77 driven by a drive shaft 83.

The cutting blades 78 work in collaboration with countercut blades 79, and thus properly cut and trim a sheet of cardboard material corrugated 81.

Figure 1 also shows a support shaft 11, which holds a plurality of disk elements of counter cut 79 that include a plurality of grooves related.

As indicated, the previous axes functional tend to flex due to the effort applied in the same for the 77 functional tapes in collaboration with the flat part of the countercut elements 79, in the presence of a corrugated cardboard sheet 81 that is retained for process it

The functional machine shown in the figure 1 comprises a gearmotor unit 85, a drive shaft 86 which, at through gears 87 and related toothed sectors 96, rotatably actuates eccentric bushings 90 arranged in some ends thereof, which is provided to adjust the thickness or the separation between the countercut elements 79 supported by axis 11, and upper belts 77.

On top, the functional machine it also includes another functional axis, which is provided to make the support elements 82 that hold the discs of cut 78 and pulleys and belts 77 slide axially in horizontal direction

Figure 1 also shows a support bar 3, to which a linear guide 23 is applied, and on it is supported slidingly a sliding shoe or block 24 which in turn it holds an oleodynamic cylinder 6, on which a frame 16.

The upper shaft 83 rotatably drives the 77 belts and related pulleys, which rest on the support elements or arms 82 through pivots 84, around which said elements are rotatably actuated cutting disc 78.

Figure 2 shows a side view of the shafts that hold cutting discs 78, countercut discs 79, eccentric bushings 90, toothed or gear sectors 96, gears 87, prehending mechanism 92, counterprehension 94, creasing mechanism 93 and mechanism countered 95.

In addition, Figure 2 schematically shows a functional machine that includes pairs of opposite axes 11, 11 ', 12, 12 ', 13, 13', 14 and 14 ', to which the device described in this document.

Figures 1 and 2 show, so schematic, a functional machine 100 to process material from corrugated cardboard, to which the device of the invention.

More specifically, the disk elements of Cut 78 work in collaboration with some countercut discs 79, with which they correctly cut and trim a sheet of corrugated cardboard 81.

Figure 1 shows a support shaft 11 that Holds ribbed countercut blades.

In particular, axes 11, 11 ', 12, 12', 13, 13 ', 14 and 14' will tend to flex due to the pressure exerted by the action of the cutting discs 78 against the discs of counter cut 79, in the presence of a corrugated cardboard sheet 81 that It is being processed.

Figure 3 shows a support bar 1, designed to hold the oleodynamic cylinders 6, above the which frames are applied 16.

To said support bar 1, they are connected sliding shoes or studs 24, which slide on some linear guides 23 applied to support sleepers 2 and 3.

Figure 3 and the following figures show the device according to the invention, designed for application in machines for processing corrugated cardboard sheets 21 and to prevent axes 11, 11 ', 12, 12', 13, 13 ', 14 and 14' from being flex, and said device comprises a support bar 1, for the device that holds axes 11, 12, 13 and 14, which it is arranged in a longitudinal direction with respect to the Entrance direction of corrugated cardboard material sheet 81.

Said support bar 1 rests in turn on two sleepers shown in figure 3 and indicated generally in this figure by reference numbers 2 and 3.

Side sleepers 2 and 3 apply, to your time, at its ends, to the main projections of the machine and they are held, in a central part thereof, on some 4 columns that rest on the ground.

The support bar 1 houses and supports once, a plurality of hydraulic jacks 6, connected to a pump oleodynamics 8 through connecting pipes 7 to supply a working hydraulic fluid.

Pump 8 is connected, through the pipes connection 7, to a solenoid valve mechanism 10, whose solenoid valves are controlled by a pressure switch 9, designed to adjust the fluid pressure that will set the pushing force of functional jacks 6.

The oleodynamic pump 8, the pressure switch 9 and the 10 solenoid valves feed, with a fluid pressure constant, cats 6, each of which will push some corresponding support elements of each main shaft 11, 12, 13 and 14.

In this way, the deformation of flexion due to the weight of the aforementioned axes, which support said functional disks, preventing them from producing more deformations due to the passage of cardboard material 81 over the same during prehending, creasing and cutting operations.

More specifically, each hydraulic jack 6 supports a lower clamping leg element 15, with a preferably curved, rigid configuration with a frame 16 that can follow a vertical movement, thus being elevated and descended properly.

Each of said racks 16 is guided laterally by a pair of guiding elements 17 and plates of lateral retention 75.

The guiding elements 17, the plates 75 and the support bar 81 are screwed together or coupled by any other suitable coupling means, to provide a monolithic support construction, adapted to resist great efforts applied on it by the main axes 11, 12, 13 and 14, during the processing stages.

Referring to figures 3, 4 and 5, it is 19 show the motor shafts to drive the aforementioned bushings eccentrics, which are designed to adjust the distance between axes that support said counterprehension discs, countercut, contrahendido, prehendido and cleft, as well as the upper drive belts 77 arranged in a ratio of contiguity with the cutting blades, depending on the thickness of the cardboard material to be processed.

Each frame 16 in turn holds a bearing 20 that is held in a fixed position by means of pairs of lateral retention sectors 18.

Each bearing 20, in turn, supports an axis 11, 12, 13 and 14, by interposing a socket 22, providing an anti-glare function, during operations of location.

Therefore, said sleeve 22 is maintained in a fixed position by elastic annular elements twenty-one.

As shown, sleepers 2 and 3 are preferably provided with linear guides 23 and shoes or sliding blocks 24.

Linear guides 23 support the studs of slide 24, which, in turn, supports the support bar 1, for allow the system as a whole to be axially actuated, to in order not to limit location flexibility and flexibility Functional machine operation.

The axial displacement of the device of the invention can be carried out by means of elements of mechanical drive, driven in turn by electric motors or oleodynamic pistons or manually adjustable systems.

In this regard, it should be noted that the axes main 12 and 14 can alternately hold the elements of prehending and creasing disc, in particular the elements of lower disk, collaborating with the upper disk elements of prehendido and contrahendido.

The device described above works as described below.

More specifically, adjusting the distance of the lower discs of counterprehending, counterhending and counter cut, with respect to the upper drive belts of prehending and cleft, which work in collaboration with the disks countercut, should be carried out depending on the variation in The thickness of the cardboard material.

To perform the mentioned adjustment previously, it is necessary to open solenoid valve 10, cleaning the hydraulic circuit, by means of the thrust suspension of the pistons of the jacks 6.

Then, after adjusting the new position required of the main axes 11, 12, 13 and 14, the pump oleodynamics 8 will restore, with the opening of the valves solenoid 10, the thrust of the pistons of the jacks 6, by means of the pressurization of the hydraulic circuit 7, to achieve a value preset on a pressure switch 9.

In this regard, it should be noted that each piston of the hydraulic jacks 6 is controlled by a valve corresponding solenoid 10, which will close when the set and desired value.

Possible pressure drops during the Processing procedure will be compensated immediately by an automatic ignition of the oleodynamic pump 8.

Figure 4 shows, on an enlarged scale, the Sliding mechanism 30 that supports the support bar 1.

Figure 5 shows an enlarged detail, which illustrates the support surface of the support bar 1, the bar of support 1 for the device to support the axes 11, 12, 13 and 14, the tubes 7 to feed the hydraulic jacks 6, the shafts 19 to operate the eccentric bushings that they hold in their ends the main axes 11, 12, 13 and 14, the various jacks hydraulic 6, the support surface 5 to hold the bar support 1, the guiding elements 17, a linear guide 23 which holds the ball recirculation shoe 24 that holds the support surface 5 of the bar 1 for the support device of the axes (which supports axes 11, 12, 13 and 14).

Figure 6 shows, on an enlarged scale, a detail of the functional machine and, more specifically, the shoe of linear guide support 23, support bar 1 for the device for supporting axes 11, 12, 13 and 14 and the surface support bar support 1.

From the above description, it should be clear that the device of the invention, which will be applied in machines of Processing corrugated cardboard material, or other materials in sheet or strip shape, it is perfectly suitable to avoid the bending of the main axes of said machines.

The device according to the invention has been described and shown by way of illustration only, but not restrictive, of its characteristics.

Therefore, it should be clear that the described device is susceptible to various modifications and variations, which will be included in the scope of the invention.

       \ vskip1.000000 \ baselineskip
    

References cited in the description

This list of references cited by the Applicant is only for the convenience of the reader. Not a part of the European patent document. Although it has been taken special careful in the compilation of references, cannot be excluded errors or omissions and the EPO rejects all responsibility to this respect.

Patent documents cited in the description

EP 0575265 A [0011]

Claims (18)

1. A device for application in a functional machine for processing corrugated cardboard or other materials, in the form of a sheet or strip, and which is designed to prevent bending of the main axes, characterized in that said device comprises a support bar ( 1) to support an axle support mechanism, and said support bar is arranged longitudinally with respect to the input direction of the cardboard material and is supported by sleepers (2) and (3), in turn applied, in the part of its ends, on the main projections of said machine, and supported, in a central part thereof, by columns (4) and other support elements that rest on the ground. 2. A device according to claim 1, characterized in that said support bar (1) houses and holds, in turn, a plurality of hydraulic jacks (6), connected by connecting tubes (7) to supply a hydraulic fluid to an oleodynamic pump (8). A device according to the preceding claims, characterized in that said oleodynamic pump (8) is connected, through said tubes (7), to a solenoid valve mechanism (10), whose solenoid valves are controlled by a pressure switch ( 9), adapted to adjust the fluid pressure to drive said plurality of jacks (6). A device according to one or more of the preceding claims, characterized in that said oleodynamic pump (8), pressure switch (9) and solenoid valves (10) supply a fluid with a preset and constant pressure to said jacks (6), each one of which drives support elements of each main axis (11), (12), (13) and (14), and thus, the bending deformations due to the weight of said axes are compensated and eliminated, which they maintain said functional discs, thereby preventing further deformations caused by the cardboard material 81 that is being processed during prehending, creasing and cutting and / or die cutting operations. A device according to one or more of the preceding claims, characterized in that each of said hydraulic jacks (6) supports a lower clamping leg (15), with a preferably curved, rigid configuration with a designed frame (16) to provide a vertical movement, thus being able to rise and descend properly. A device according to one or more of the preceding claims, characterized in that each of said frames (16) is guided laterally by a pair of guiding elements (17) and lateral retention plates (75). A device according to one or more of the preceding claims, characterized in that said guiding elements (17), said side plates (75) and the support bar (1) are screwed together or coupled by any other means of suitable coupling, thus providing a monolithic support construction, adapted to withstand the great efforts transmitted to it by said main axes (11), (12), (13) and (14), during the processing stages of the cardboard material . A device according to one or more of the preceding claims, characterized in that said axes (19) actuate eccentric bushings, which adjust the separation between said axes of support of the disks, which respectively hold the functional counter-clamping, counter-cutting disks. , contrahendido, prehendido and cleft, as well as the related functional tapes, arranged in a position adjacent to the lower cutting blades, depending on the thickness of the cardboard material to be processed. A device according to one or more of the preceding claims, characterized in that said device comprises a plurality of frames (16), each of which in turn holds a bearing (20) that is held in a position fixed by means of pairs of lateral retention sectors (18). A device according to one or more of the preceding claims, characterized in that each of said bearings (20) supports one of said axles (11), (12), (13) and (14), by means of a bushing. friction (22), adapted to provide an anti-slip function, during location or placement operations. A device according to one or more of the preceding claims, characterized in that said device further comprises sleepers (2) and (3), which are preferably provided with linear guides (23) and sliding blocks (24) , on which said support bar (1) is mounted to allow the system as a whole to be axially actuated. 12. A device according to one or more of the preceding claims, characterized in that said device is adapted to be axially driven by mechanical elements actuated by electric motors or oleodynamic pistons or manually adjustable systems. 13. A device according to one or more of the preceding claims, characterized in that said main axes (12) and (14) alternately support said prehending and creasing discs, that is, the lower discs, collaborating with the upper discs of prehendido and contrahendido. 14. A device according to one or more of the preceding claims, characterized in that in said device an adjustment of the separation of the counterprehension, counterheading, countercut and counterlock discs, arranged at a lower level than that of the discs, is carried out. of prehending, creasing discs, punching discs and corresponding upper tapes, which work in collaboration with the countercut discs, depending on a change in the thickness of the cardboard material to be processed, and requires that said solenoid valves be opened (10), purging the hydraulic fluid from said hydraulic circuit, and disconnecting the pistons from the jacks (6). 15. A device according to one or more of the preceding claims, characterized in that, after having adjusted the required position of said main axes (11), (12), (13) and (14), the supply pump (8 ), with the solenoid valves (10) in an open position, restores the operation or thrust of the jack pistons (6), by pressurizing said hydraulic circuit, to achieve a preset value in the pressure switch (9). 16. A device according to one or more of the preceding claims, characterized in that each of said hydraulic jacks (6) is controlled by a corresponding solenoid valve (10), which will close when a desired and preset value is reached. 17. A device according to one or more of the preceding claims, characterized in that in said device, the possible pressure drops that occur during the operation of said device, are immediately compensated by a temporary automatic ignition of said oleodynamic pump (8 ). 18. A device according to one or more of the preceding claims, characterized in that said device comprises a plurality of construction elements suitably designed and coordinated mutually and described in general lines and illustrated in the previous specification and in the figures of the attached drawings to the present industrial invention patent application.