WO1993002852A1

WO1993002852A1 - Machine for shaping and mounting cardboard panels

Info

Publication number: WO1993002852A1
Application number: PCT/ES1992/000026
Authority: WO
Inventors: Sixto Collazos Martinez
Original assignee: Sixto Collazos Martinez
Priority date: 1991-08-08
Filing date: 1992-03-11
Publication date: 1993-02-18
Also published as: EP0552318A1; ES2048624B1; AR244127A1; ES2048624A1; PT100677A

Abstract

Machine for shaping and mounting cardboard panels, which may be used to produce cardboard panels having a high degree of rigidity and firmness, starting from two cardboard sheats wherein is formed a series of protuberant ribs by means of two upper shaping platforms overlaying two lower shaping platforms, the ribs of one sheet or plate being in orthogonal orientation with respect to the rib of the other plate, the two plates being nested with each other by the rocking of the lower platforms from a horizontal position to a vertical position bringing the plates on top till they fit together.

Description

Machine to form and assemble cardboard panels.

The present invention relates, as its title indicates, to a machine for forming and assembling cardboard panels in order to provide rigidity and firmness to said panels for later use as tables or pallets to support and handle loads, said machine presenting the particularity of being able to fit and glue two cardboard plates in which a series of parallel ribs have previously been practiced by means of respective elaborating mechanisms of said ribs that the machine incoproves with the nerves of an iron being orthogonal in relation to the other, in such so that when both plates are fitted, a panel of greater firmness and solidity is produced.

BACKGROUND OF THE INVENTION

There are a variety of machines that work on cardboard sheets, giving them one configuration or another for various manufacturing in industry or commerce, most of which include the use of cardboard sheets to package products, cover them or insulate them to provide them with greater protection.

Forming machines of cardboard panels, for use as tables or pallets or panels intended to support or handle loads are not known until now. In fact, this type of work has been carried out until today on tables formed by materials that provide at the same time the greatest firmness and the lowest possible weight.

For this a material that has been used more - £. -

extensively it is wood, however wood, although it is a lighter material compared to other types of materials that can be used for similar purposes, such as metals, when it comes to panels and pallets of considerable dimensions, it can reach create problems regarding the weight of the wooden board itself.

In other cases, as mentioned above, metals in the form of bars or rigid profiles are used, which are arranged in parallel and separately, normally two or three of them to avoid a high weight, forming a pallet that has large areas open.

This type of pallets has the disadvantage of not forming a flat surface because of the bars or separate profiles, so in the case that loads of smaller dimensions have to be handled, they do not cover the open space between two separate profiles giving rise at the possibility of falling of the load, At the same time they present considerable weights requiring a greater effort on the part of the manipulative mechanism in terms of the elevation or displacement of the load.

To solve the problems described above, the machine for forming and assembling cardboard panels object of the present invention has been devised.

This machine produces reinforced cardboard panels by joining two cardboard sheets that fit together and stick together, each plate presenting a series of projecting and parallel ribs that are made using a special mechanism provided by the machine, fitting the ribs of a cardboard plate with those of the other orthogonally with respect to each other, with what the resulting panel internally presents a network of nerves joined and articulated with each other, resulting in the reinforcement and rigidity of the panel.

DESCRIPTION OF THE INVENTION

The machine of the invention consists of two sliding platforms that can be moved and disposed in the upper part of the machine. Said platforms are capable of moving horizontally towards the stacking area of the cardboard sheets initially flat. When this displacement towards the plates occurs, a series of glue injectors located at the edges of the devices and transverse to the direction of displacement, deposit glue on the upper surface of each plate, this being collected and attached to the respective platform by windy paths that brings each platform.

Since the collection and adhesion of the plate has been produced by means of said suction cups, each platform returns to the area in which it was initially located, this being the area of ^" forming of the plates. While this return or displacement occurs, a second series of lower tail injectors, also arranged transversely to the displacement of the cardboard, deposits glue on the bottom surface of the plate.

once the shaping platforms have been returned to the forming area, with the respective cardboard plates attached to them, they descend vertically until they are placed on other lower platforms of support, each formed by a multitude of rectangular and parallel sections, of small width.

Between each two adjacent sections there are a series of nerve-making devices with a strut element as a rod of small diameter, capable of moving upwards thanks to a lifting mechanism designed for this purpose.

The upper shaping platforms have a series of double parallel and transverse sections, each double section consisting of a pair of prismatic-rectangular and elongated bars, capable of moving horizontally in opposite directions.

Thus, when the upper platform is placed on the lower platform, and with the cardboard plate in the middle, the sections of the upper platform are in opposite position with those of the lower platform. In order to practice nerves in the plate, the nerve-forming device is activated by horizontal displacement of each pair of adjacent lower sections which in turn transmit a vertical and upward movement by the mentioned lifting mechanism of the nerve-making device whose effect is to introduce pressure on the bottom surface of the plate. At the same time the pair of upper bars are separated horizontally, that is to say each bar belonging to a pair moves in the opposite direction to that of the respective adjacent bar of the same pair giving rise to the approach of a pair of bars belonging to two sections adjacent doubles among which the corresponding nerve has to be practiced. Therefore, as the pair of adjacent sections gets so close Lower, like the pair of the mentioned bars, the iron in this area undergoes thrusts caused from both sides in opposite directions and inwards where the nerve-making element is also exerting a vertical upward pressure.

As a result of the effects of these forces, two horizontally oriented inwards that in turn favor the third, and one vertically, the plate is folded up thus forming a protruding rib perpendicularly on the surface of the plate. This process is carried out simultaneously on the entire surface of the plate producing nerves between each two parallel sections.

Once the nerves are practiced, each of which is immobilized by glue, since in the interior area between the side walls of each nerve is the glue that was previously deposited on the lower surface of the cardboard plate as it is described in the previous sections.

In the next phase of the operation of the machine, the upper shaping platforms are raised leaving the plates already made on the lower platforms, each of the latter is joined, by means of a rotation axis inferred, to two tilting cylinders, incorporating each of these an inner piston capable of raising and lowering from the inside of the respective cylinders which in turn are held by their lower end to the ground, being able to swing around two axes of rotation.

The final forming is done once the platforms, each of them carrying a cardboard plate with ribs rises and tilts due to the elevation of the pistons of the aforementioned cylinders, turning around the axis that joins them with the end of the piston, in opposite directions, until both platforms are joined together in position vertical, thus fitting the two cardboard sheets that each one carries over.

As mentioned above, the respective nerves of one plate are oriented orthogonally with respect to those of the other. In order to produce a perfect fit between both plates, the respective ribs of each one are introduced into openings that have been previously practiced in each plate for this purpose. Said openings are located in predetermined positions with exactitude, in such a way that when making the ribs they are placed in suitable positions to receive when fitting the ribs of the opposite plate. This is done using cardboard sheets that have already been incorporating the mentioned openings.

When the nerves fit together they stick together as they have glue at the same fitting point thanks to the effect of the tail injectors described above.

PESORTPOTON OF THE FIGURES

Figure i is an elevation view of the machine for forming and assembling cardboard panels.

Figure 2 is a plan view of the machine of Figure 1, Figure 3 is an elevational view of the machine of the invention with the upper platforms superimposed on the lower ones and with the respective cardboard plates in the middle.

Figure 4 is an elevational view of the machine of the invention in a condition to fit between two plates.

Figure 5 presents two detailed views of the nerve making device.

EXAMPLE OF PRACTICAL REALIZATION

The machine for forming and assembling cardboard panels consists of two upper forming platforms (1) and (2), movable both horizontally and vertically, so that the horizontal displacement of the platform (1) is in the orthogonal direction to the direction of horizontal displacement of the platform (2). each of the platforms incorporates a series of horizontal and parallel double sections (10) with the particularity that each double section consists of two bars of prismatic-rectangular configuration and ^" juxtaposed afargadas and capable of making displacements in horizontal and opposite direction to each other. (See figure 5.) The respective double sections of one platform are arranged orthogonally with respect to those of the other platform as can be seen in Figure 2.

Likewise, each upper platform has suction cups (5) for the collection and adhesion of the cardboard plate while it moves through the platform (1) or (2). Laterally and transversely with Regarding the direction of travel of each platform, they have a series of glue injectors (4) arranged in predetermined positions to deposit glue on the upper surface of the cardboard plate, a second series of lower glue injectors (6) they are arranged horizontally and also transversely with respect to the direction of movement of each platform, and are intended to deposit glue in predetermined areas of the lower surface of the plate when it returns together with the platform to the forming position.

Likewise, the machine object of the invention consists of lower shaping platforms (7), each of which is constructed by means of a series of horizontal and parallel sections (8) of prismatic-rectangular configuration, so that the corresponding sections to a lower platform they are arranged orthogonally with respect to the sections of the other lower platform. Bottom between each two adjacent sections is a series of nerve making devices (9), connected on each side to the bottom of the respective section (8). Said device (see figure 5), consists of a strut element (91> by way of a rod of small diameter which is surrounded by a lower ring connected in turn to two articulated arms each by means of two axes of rotation in their opposite end that joins them to the lower surface of the respective section (8.) Other two arms start from the same axis of rotation and are connected to the upper part of the rod (91), the four arms forming a diamond-like configuration. This structure allows the two adjacent sections (8) to approach, this movement is transmitted to the rod as a vertical and upward movement thanks to the action of The mentioned arms.

inferiorly, the lower platforms (7) are joined to two tilting cylinders (12) each incorporating a piston capable of raising and lowering, the upper end of the piston being connected to the lower part of the corresponding platform (7) by means of a rotation axis (13). The tilting cylinders (12) are each connected to the ground at its lower end by means of two other pivot axes (15).

With this structure, the machine object of the invention performs a duty cycle as follows:

First of all the upper platforms (1) and

(2) move to their respective stacking areas of cardboard sheets. In figure 1 the stacking area of the plates corresponding to the platform (2) can be seen with reference (3), at the same time that the platform (1) moves horizontally and perpendicular to that of the platform (2) , towards its respective stacking area of cardboard sheets which is not referenced in the figure.

When this displacement occurs, the injectors of upper tails deposit glue on each cardboard plate, once the platform is placed on the plate stack, the suction cups (5) are activated to collect the first plate in the pile. then the platforms, with the plates attached return to the area of the beginning of the operation where the forming process will continue, while in this return movement the lower tail injectors (6) deposit glue on the bottom surface of each plate. In the next phase of work, the platforms

(1) and (2), already in the forming area, go down to stand on the lower platforms (7), and with the cardboard plate (11) located in the middle (figure 3). At this time the lower sections (8) make a horizontal movement approaching each other, while each pair of the upper double sections (10) are separated from each other, thus exerting pressure in the direction of the displacements both above and below the cardboard board. At the same time, as shown in Figure 5, the displacement of the lower sections (8) forces the rod (91) to make a vertical and upward movement, exerting pressure in the same vertical direction on the cardboard plate (11) thus making nerves in it. These nerves are immobilized thanks to the effect of the glue already deposited that is currently between the inner walls of each nerve.

After having made the nerves, the upper platforms (i) and (2) are raised to allow sufficient space for the next phase of work that is the final coforming.

In the final forming phase, the pistons of the tilting cylinders (12) are raised simultaneously giving rise to the lifting and tilting of the platforms (7), until they become joined in the position of the cardboard plates that they carry on (see figure 4).

The fitting of the nerves to each other is possible thanks to a series of openings that have been previously made in the plates before starting the process, in predetermined positions such that when formed the nerves, said openings are presented at certain points along each nerve which correspond to the area of the introduction of the upper edges of the nerves of the facing plate, thus allowing a perfect fit between both plates. The lace is immobilized by the glue that was previously deposited on the plates joining and gluing them in the areas of lace, thus completing a work cycle with the consequent cardboard panel already formed.

Describing sufficiently the nature of the present invention, as well as a way of putting it into practice, we can only say that as a whole and its component parts it is possible to introduce changes in form, materials, layout, as long as said alterations vary substantially between the features of the invention claimed below:

Claims

1.- Machine for forming and assembling cardboard panels, applicable to produce cardboard panels with a high degree of rigidity and firmness, characterized in that, starting from two cardboard plates, their function is to elaborate a series of projecting ribs in each of them by means of two pairs of platforms, each pair consisting of an upper and a lower platform and facing each other, the upper platforms being able to move both horizontally and vertically, and the lower platforms capable of tilting from horizontal to vertical position by means of two tilting cylinders lower. The ribs in the plates are practiced by a series of parallel and horizontal sections located on each lower platform and capable of moving horizontally, a series of parallel and horizontal double sections located on each upper platform and capable of moving horizontally, and a series of nerve making devices located between each pair of adjacent lower sections. It is also characterized in that the two plates in which the nerves have been made fit together and stick to each other after the upper platforms have been removed and thanks to the swing of the lower platforms until they are facing each other in an upright position in which the fitting of the respective plates that each one carries is produced, remaining immobilized by the effect of the glue previously deposited in predetermined places of each plate.

2. Machine for forming and assembling cardboard panels, according to the first claim, characterized in that the upper platforms move horizontally but in an orthogonal direction with respect to the other, to carry out the collection of cardboard sheets.

3. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that each platform consists of a series of tail injectors located in transverse orientation with respect to the direction of movement of the platform and intended to deposit glue on the surface top of the plate while the platform moves towards the stacking area of the cardboard sheets.

4. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that each upper platform has suction cups intended for the plate to be collected and adhered to the respective platform.

5. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that once the plates are collected and while the platforms return to the initial position a series of lower tail injectors deposit glue on the bottom surface of each plate, lowering the platforms later until being placed on the lower platforms with the cardboard plate in the middle.

6. Machine for forming and assembling cardboard panels according to the preceding claims, characterized in that the nerve making devices are located between the sections of the lower platform and each one of them consists of a strut element, as a rod, articulated by four arms arranged as a rhombus with pivot axes at each vertex of the same, the lateral vertices of the rhombus being connected with the corresponding adjacent sections in such a way that they can translate the horizontal approach movement of said sections into a vertical movement of the rod which, in turn, exerts pressure on the cardboard plate in the direction vertical and up.

7. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that the ribs are produced thanks to the combination of three pressure effects on the upper and lower surface of the cardboard plate, one of which originated by the horizontal approach of two adjacent sections of the lower platform, another due to the horizontal approach of two facing bars each belonging to a double section adjacent to another in the upper platform and the third caused by the effect of vertical and upward movement of the rod of the nerve-making device, producing a multitude of parallel nerves in each plate, the orientation of the nerves of one plate being orthogonal to those practiced in the other,

8. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that the nerves remain immobilized thanks to the effect of the glue that was previously deposited in the predetermined areas that when the nerves are produced make up the interior walls thereof.

9. Machine for forming and assembling cardboard panels, according to the preceding claims, characterized in that the lower platforms with the cardboard plates on which the ribs have been made, are tilted until they are joined together in vertical position thus fitting the ribs of the plates together so that each nerve is introduced into a series of openings previously made from the start of the operation, in corresponding places and intended for. receive the aforementioned nerves, sticking together with glue that was already deposited on the plates.