WO2006120269A1

WO2006120269A1 - Forming device for cardboard-box-forming machines

Info

Publication number: WO2006120269A1
Application number: PCT/ES2006/000228
Authority: WO
Inventors: José Maria TELLO VALERO
Original assignee: Kappa Iberoamericana S.A.
Priority date: 2005-05-11
Filing date: 2006-05-10
Publication date: 2006-11-16
Also published as: ES2265274A1; ES2265274B1

Abstract

The invention relates to a forming device for cardboard-box-forming machines, of the type that is used to form boxes (2) from a flat, punched sheet which is transformed into a tray with corner reinforcements (7-12). The invention comprises fixed, vertical guides (1) for deformation of the cardboard sheet and each of said guides is equipped with a lateral tilting bending unit (10) which moves horizontally above the side panels (5'), such as to strike the end section (12) of the reinforcements and to lower same onto the bottom section (7) thereof. The invention also comprises a tilting head (13) which is mounted next to each of the side panels (5), outside same, and which tilts into the box once said box has been formed. The aforementioned head (13) supports a pair of opposing cylinders (14) which, together with the corresponding tampers (15), act on the reinforcements (12-7), such as to secure same against the inner lateral face of the corresponding side (5'). In this way, the box-forming process is considerably accelerated.

Description

CONFORMING DEVICE FOR CONFORMING MACHINES OF CARTON BOXES

D E S C R I P C I Ó N

OBJECT OF THE INVENTION

The present invention relates to a forming device, intended to be part of a cardboard box forming machine, of the type that converts a laminar and single-piece body into a prismatic-rectangular receptacle, open at the top, with reinforcements in its corners or vertical edges, which enhance the stacking capacity of said boxes in a load situation.

The object of the invention is to substantially improve the operating process of assembling the box, specifically in regard to the conformation and fixation of said reinforcements, achieving greater operational speed and, consequently, greater performance of the machine.

The invention is therefore applicable to the field of machinery for the manufacture of cardboard boxes, especially boxes for the transport and storage of perishable products, such as for example fruit and vegetable products.

BACKGROUND OF THE INVENTION A common solution for the type of boxes mentioned above, is to use a cardboard die-cut iron, with a series of cutting and folding lines, so that said plate is originally flat, and is thus supplied to the forming machine, and during the forming phase, the bottom of the box is defined therein, its side walls corresponding to pockets and slats, and extensions, generally of said poles, which are bent and adapted to the gates, to assemble the box, and that They also fold over themselves to reinforce the vertical edges of the assembly.

The plates thus structured are supplied to the machine forming piles of greater or lesser height, and the forming machine has a first unit of unitary plate extraction, a second unit of application of glue to the planned areas of said plates for the assembly of the box, and finally a shaping unit where the plates lose their flat configuration to adopt the final configuration of the box.

For this, the shaping device has a fixed base, on which the flat cardboard plate is stopped at its exit from the glue application unit, said fixed base materializing in four angular and vertical guides, located in correspondence with the vertices of the bottom of the box, collaborating with said fixed base an upper tamper that when acting on the cardboard board causes the same to descend along the mentioned angular guides, with the consequent tilting of poles and slats towards its final position of perpendicularity with respect to the bottom of the box.

The problem arises when folding and fixing. of the extensions of the slats (if applicable in the gates), which must be carried out with the collaboration of tilting and lateral bends, located in correspondence with both the slats and with the slats, so that the actuation of these bends on two planes perpendicular to each other, it makes them first have to act two of them, for example those corresponding to the heads, and then the other two, those corresponding to the gates, with a lag of sufficient time for the former to have performed their function and they have left the inside of the box, to allow access to the seconds, which evidently represents a significant waste of time in a process of this type, such as the manufacture of cardboard boxes, where the operational cadence must be very high.

DESCRIPTION OF THE INVENTION

The shaping device that the invention proposes solves in a fully satisfactory manner the above-mentioned problem, so that it allows a combined action of the side bends, almost simultaneously, which greatly accelerates the construction process of the box.

To do this and more specifically, to each of the angular and vertical guides, corresponding to each of the equally vertical edges of the box, which participate in the fixed base of the shaper, a tilting arm is articulated, finished off in a roller, swing arm within an imaginary horizontal plane located above the upper edge of the slats, once they have reached their final position, arms that are driven by respective pneumatic cylinders, and that through the aforementioned rollers they generate the folding on themselves of the extensions of the testeros, although obviously without reaching their definitive position. This swing arm or folding arm, in addition to determining the folding on themselves of the extensions of the heads, breaks the crease of the fold lines provided for this purpose with the collaboration of the mandrel or ram intended to be housed inside the box, as It will be seen later.

On the fixed base, in correspondence with the box heads and outside of them, there are two tilting heads that are considerably shorter than said boxes and are capable of collapsing towards the inner side of the latter once the box It has been basically armed, so that such heads do not interfere with the swinging of the aforementioned arms, and the maneuver of one and the other can be carried out practically simultaneously.

These tilting heads on the heads are each provided with a pair of opposing pneumatic cylinders, whose rods are finished off in rammers that act on the extensions of the heads, already folded on themselves by the effect of the tilters, acting immediately following the latter, to the point that they collaborate with them in the terminal phase of folding the extensions, producing the definitive fixation of both the sectors of the folding between themselves and of the external sector to the corresponding gualdera.

According to another of the characteristics of the invention, the classic complementary upper ram of the fixed base incorporates as a support base four legs located in correspondence with the imaginary ones. vertical edges of a rectangular prism coinciding with the inside of the box to be obtained, on which they are intended to fold over themselves, with interposition of such legs, the lateral extensions of the heads, collaborating with the latter a central cross support that , together with the ends of the aforementioned legs, acts on the cardboard plate, specifically in correspondence with the sector that must constitute the bottom of the box. The aforementioned legs are of adjustable positioning in a sense of greater or lesser approximation to each other, to adapt them to different box sizes, and have sharp edges on their inner edge to cause the testerosj flaps or extensions to break down. cleft of these flaps and the folding of them is perfect.

For the rest, this tamper, after the downward drag of the cardboard plate and its transformation into a prismatic-rectangular tray, and after the actuation of the folding devices for the flaps or extensions of the heads, is removed to let the heads work tilting, and when acting on a new cardboard plate, the cardboard box obtained in the immediately previous machine operating cycle is ejected from the lower area of the machine.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. with an illustrative and non-limiting nature, the next:

Figure L- Shows a partial perspective view of a forming device for cardboard box forming machines made in accordance with the object of the present invention, in which a properly formed box appears, and in which the upper tamper has been removed to show more clearly the structure of the lower area of the mechanism.

Figure 2.- Shows another partial detail in perspective of the assembly represented in the previous figure, rotated approximately 90 ° to show more clearly one of the tilting heads located next to the heads.

Figure 3.- It shows an enlarged detail and also in perspective of one of the angular and vertical guides with its corresponding tilting folder.

Figure 4 shows a detail also enlarged in perspective of one of the tilting heads.

Figure 5.- Shows, finally, a perspective view of the complementary ram of the structure represented in the previous figures.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the aforementioned figures, it can be observed that in the forming device proposed by the invention, four guides participate angular and vertical (1), located according to the vertices of an imaginary rectangle dimensionally coincident with the floor of the box (2) to be obtained, for which purpose such guides have bushings (3) for passage and fixing of distance bars (4) which, like the guides (1), are part of the fixed structure of the machine, in which a wide upper opening of rectangular contour is defined at the level of the shaper, which allows the introduction of the boxes inside the same, forcing its heads (5) and its slats (5 ') to fold upwards, with the collaboration of terminal and arched sections (6) of said guides (1) that facilitate the start of deformation, in which in parallel Orthogonal and internal bending occurs of the extreme extensions (7) of the heads, which are to constitute the reinforcements for the corners of the box, when folded on themselves, as shown in Figure 1.

To each of such angular and vertical guides (1) a support (8) is externally integral on which a vertical axis (9) of tilt is mounted for an arm (10) angled orthogonally inwards and finished off in a roller (11 ), so that said arm (10), which normally keeps the roller (11) out of the wide prismatic-rectangular passage for the boxes (2) through the shaper, is capable of tilting said roller inwards, when it is actuated by a cylinder, so that the roller (11) passes over the free edge of the corresponding rack (5 ') and strikes the end sector (12) of the corresponding extension or reinforcement (7), folding it on itself towards a boundary situation close to that shown in figure 1.

On the same bars (4) corresponding to the fixed structure of the shaper, they are mounted, with the collaboration of respective tilting supports, two heads (13), as shown in Figure 4, which consequently they are located at the level of the heads (5) but outside of them, said heads (13) being substantially shorter than the heads (5), so that in their tilting inwards they do not hinder the movement of the tilting bends ( 10) acting on the gates (5 '), and these heads (13) being destined to finally press the reinforcements of the corners of the boxes on themselves, that is, to press the terminal sector (12) against the initial sector ( 7) of the same, and the latter against the internal wall of the slats (5 '), to simultaneously achieve the definitive fixing or assembly of the box with the adhesive.

For this, each head (13) has two opposing cylinders (14), whose rods are finished in two pistons (15), which once the head as a whole swings towards the inside of the box, are projected in opposition in order to act on the entire surface of the reinforcements (12) or extreme sector of the extensions (7), which they do practically at the same time as the swinging bends (10), so that both the assembly of its box and that of the reinforcements of the same, is carried out in a single operational phase and with a minimum machine-time consumption.

As a complement to the structure described, the ram (16) acting first on the cardboard plate to form the box (2), that is to say acting on the structure described above, the one shown in detail in Figure 5, is constituted by a superior cross support (17), which is the one that receives the upward and downward movement of the corresponding actuator cylinder, this support (17) counting at the ends of one of its branches with vertical and descending uprights (18) for fixing the same as the tamper proper (19), which also adopts a cross configuration and is substantially under-sized with respect to the perimeter of the bottom (2) of the box to be obtained, being fixed to the ends of the other arm of the cross, with the possibility of positional adjustment by means of screws (20), horizontal and parallel arms (21) that by their ends and by means of positional regulation similar to those just mentioned, they receive respective legs

(22), considerably flattened, intended to adapt to the vertical edges of the box (2) in the terminal phase of its conformation, specifically to adapt to the first sector (7) of the extensions of the testers, to act as sufferers that allow a correct dejection of the terminal sector of said extensions (12) over the initial sector (7), ensuring a perfect finish for the box, which is finally finished off with the performance of the heads (13) that in turn definitely fix the two sections of the reinforcements and such reinforcements as a whole to the boxes of the box.

Obviously, the invention is also applicable to shaping devices in which the aforementioned reinforcements of the box are obtained based on the extensions of the slats and are intended to be fixed to the heads, without more than conveniently modifying the positioning of the folding and tilting heads, without affecting the essence of the invention at all.

Claims

R E I V I N D I C A C I O N E S

I ^to .- device former for forming machines cartons, in which a first removal station cardboard sheets duly stamped, a second station for glue to said plates and a third station embodied in the shaping device set in which such flat plates are transformed into the definitive box, a device in which a fixed base participates that defines a broad prismatic-rectangular step, formally and dimensionally coinciding with the floor of the box to be obtained, and an upper tamper that forces the aforementioned flat plate to penetrate the housing of the fixed base for its transformation into a prismatic-rectangular tray with reinforcements in its corners, characterized in that each of the determining vertical and angular guides of the fixed base incorporates a lateral and tilting folder, topped on a roller, initially located outside the passage for the box and able to penetrate its tilting towards the inside of the latter, immediately above the upper edge of the slats, when the reinforcement extensions are placed in the heads, so that said tilting bends cause the extensions of the constituent testers to fold back on themselves. the reinforcements of the box, while also on said fixed base and in correspondence with each tester, a tilting head is established, initially located outside the box and capable of penetrating into the latter and extending to act on the reinforcements of the corners, once they have been folded over themselves.

2 .- device for forming machines forming cardboard boxes, according ^to claim I, wherein each head tilting is constituted by a central support, capable of tilting on the fixed base of the shaper, normally located outside the opening or passage for the boxes established within said shaper and capable of tilting towards said step, once the box is formed , said head incorporating two opposing cylinders, finished off in respective rammers, which initially have a distance considerably less than the length of the heads, so as not to interfere in their access to the interior of the box with the tilting benders, and which finally extend by pressing the reinforcements of the corners of the boxes on themselves and on the inner side of the slats, for its definitive fixation with the adhesive.

3 .- device former for forming machines cardboard boxes, according to claim Ia, wherein the acting ram on the flat cardboard sheet die has an upper cross support one of whose arms are uprights integral fixing rammer itself said, located at the lower level and also in a cross configuration, while on the other arm of the upper support two longitudinal and parallel bars are integral, and at their free ends respective flat and descending legs are fixed, which reach the level of the tamper proper and which are intended to adapt to the internal face of the extensions of the box heads, and to act as a runner on which the terminal sector of said extensions is lowered by the effect of tilting bends, said positioning legs being adjustable with respect to to the longitudinal bars, like the latter with respect to the upper support r in cross, in order to dimensionally adjust the ram to boxes of different sizes.