ES1066751U - Entraining device plates for boxes forming machines. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Plate dragging device for box forming machines, of the type that incorporate a stop dragged by a pair of chains between two stringers of a table on which the plates are deposited, for the transfer of the same towards the area of shaping the machine, characterized in that said stop is mounted pivotably on a support conveniently fixed to the dragging chains, said stop adopting an inverted "L" profile and being further related to said support through a spring located above the stop proper and its axis of tilting on the support, so that tends to keep its upper horizontal and upper branch, branch that tilts down and against the said spring when the vertical branch of the stop hits the edge of the plate. (Machine-translation by Google Translate, not legally binding)

Description

Ironing device, for box forming machines.

Object of the invention

The present invention relates to a device specially designed to drag plates, previously stamped, during feeding with said plates of a box forming machine, specifically of a press brake that converts each plate or sheet body into a body three-dimensional, the constituent of the finished box.

The object of the invention is to achieve a perfect positional stability of the plates at the time the that the dragging device strikes them, avoiding their Later, bad conformations in the box.

The invention thus falls within the scope of the manufacture of boxes or containers, such as those used in the product transport

Background of the invention

Certain type of forming machines boxes have a dragging device that, receiving the properly punched sheets, printed and with adhesive areas, moves them to the machine shaping zone, where it produces the folding or dejection of its heads and gualderas with with respect to the bottom, as well as the stiffening and stiffening fins of the box, on which the zones are usually located Adhesive

These dragging devices consist of a top plate, associated with a pair of chains and describing with the latter a cyclic trajectory, running said plate by the defined space between the constituent stringers of a table on which the plates are deposited unitary, with the help of suction cups or other conveyors. This way the pusher plate acts on the edge of the plate located on the table, dragging it towards the shaping zone that finishes the installation.

These draggers, perfectly valid from the theoretical point of view, they present in practice a problem derived from the contact of the drag plate on the plate is produced abruptly, specifically by means of a impact that tends to uncontrolled plate displacement on the table, which in practice brings with it that in many Sometimes said plate does not reach the shaping sector of the box in the theoretical or exact position, producing anomalies in the folding it, which will lead to deficiencies in the box navy.

Description of the invention

The plate dragging device for box forming machines that is the object of the The present invention resolves in a fully satisfactory manner the problem discussed above.

For this purpose, the dragging device starts from a conventional basic structure, based on a movable stop longitudinally between the stringers of a fixed, dragged table by a pair of chains with cyclic movement, centering their features in a special structuring and functionality to the aforementioned stop, which avoids contact with its impact on the iron and, consequently, ensures that the iron is not going to suffer any kind of mobilization other than that planned.

Specifically, the aforementioned cap is materialized in a kind of rocker mounted with freedom of tilt over a support that is integral to the drag chains, adopting said butt an inverted "L" profile, so that through from its vertical branch comes into contact with the edge of the iron, but without dragging it into this initial phase due to its possibility of tilting, which occurs against a low voltage setting spring, so that in this movement of top swing the horizontal branch of the top describes a downward movement in such tilting, until resting on the upper side of the iron causing a pressure on it against the table, from which situation said plate begins to be dragged by the stop in the normal displacement of the chains that drag their support.

According to this structuring before start the drag of the plate a clamping of the same against the table, which ensures that such displacement on it last is carried out with a perfectly positioned controlled of said plate.

According to another of the characteristics of the invention is provided that the horizontal and upper branch of the stop swingarm is auctioned by its free edge in a thickening cylindrical that improves its support conditions on the griddle.

Description of the drawings

To complement the description that is being performing and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization of it, is accompanied as part member of that description, a set of drawings where with illustrative and non-limiting nature, what has been represented next:

Figure 1.- Shows, according to a representation schematic plan, a plate dragging device, duly implanted in a box forming machine.

Figure 2.- Shows a profile of the set represented in the previous figure.

Figure 3.- Shows a profile similar to that of the previous figure, at the moment when the swinging stop of the device comes into contact with the edge of the iron.

Figure 4.- Shows, finally, a representation similar to figure 3, but at the moment when the dragging of said plate begins.

Preferred Embodiment of the Invention

In view of the aforementioned figures, it can be seen how the dragging device proposed by the invention is constituted by an inverted "L" stop (1), that is to say, it forms a preferably straight dihedral, with concavity oriented downwards and forwards , in which a vertical branch (3) is defined, intended to come into contact with the corresponding edge (4) of the plate (5), to drag it on the table (6), materialized in a pair of stringers parallel and conveniently distanced from each other to allow the mobile stop (1) to pass between them, when it is dragged by a pair of chains (7) that run through the hollow interior of the stringers (6) constituting the same, when they are actuated by respective crowns
serrated (8).

The vertical branch (3) of the stop (1) extends along its lateral edges in two fins (9), bent orthogonally backwards, through which the stop (1) is pivotally mounted on an axis (10) that it relates to a fixed support (11) materialized in turn in a pair of lateral lugs that form a fork duly attached to the chains (7) and dragged by the latter.
more.

As a complement to the structure described on stop (1) is related to the support (11) through a spring (12), preferably horizontal, which tends to keep the branch also horizontal (13) of the rocker stop (1) in situation upper limit, specifically in the position shown in the Figures 2 and 3.

Since the tilt axis (10) of the stop (1) It stands considerably above the operational level of the table (6), when said stop (1) approaches the plate (5) deposited on the table (6), make contact with the edge (4) of the same through its vertical branch (3), in the lower area of the same, which brings with it a damping effect since the forward movement of the stop is drastically reduced by the backward tilt of the lower area of the same, tilt which logically is accompanied by another tilting of its branch horizontal (13), to a borderline situation where the edge free and returned (14) of the latter comes into contact with the upper face of the iron (5), as shown in Figure 4, pinching it against the table (6) and ensuring a correct sliding the iron (5) on the table (6) throughout the travel of said plate until finally reaching the area of machine shaping

A high damping effect is achieved in the incidence of the trailing stop on the plate, which allows to ensure that the latter reaches in any case the area of shaping the box in perfect position, which will give place that the assembly of the box also occurs in optimal conditions, ensuring a 100% acceptable final result.

Claims (4)

1. Plate dragging device for box-forming machines, of the type that incorporate a stop dragged by a pair of chains between two stringers constituting a table on which the plates are deposited, for the transfer of them to the area of forming the machine, characterized in that said stop is pivotally mounted on a support conveniently fixed to the drag chains, said stop adopting an inverted "L" profile and also being related to said support through a spring located above the stopper itself and its tilt axis on the support, so that it tends to keep its horizontal and upper branch raised, branch that tilts down and against said spring when the vertical branch of the stop falls on the edge of the plate. 2. Plate-pulling device for box-forming machines, according to claim 1, characterized in that said inverted "L" profile stop has, in correspondence with its vertical and lower branch, two rear, parallel fins or extensions, on which it locates the axis of tilt of the stop with respect to the support, axis of tilt that is substantially elevated with respect to the plane of the worktable. 3. Plate-dragging device for box-forming machines, according to previous claims, characterized in that the horizontal and upper branch of the stop is topped by its free edge in a cylindrical expansion, capable of being lined with an elastic element, intended to constitute the area of support of the stop on the upper face of the iron, pressing it against the table before dragging it. 4. Plate-dragging device for box-forming machines, according to previous claims, characterized in that said spring established between a swinging stop and a fixed support thereof, is located above the pivot axis of the stop, which in turn is substantially above - raised with respect to the plane of displacement of the plate.