DE1113354B - Box folding device - Google Patents

Description

Box Folding Apparatus The invention relates to an apparatus for erecting a blank made of cardboard, cardboard or the like. Divided into compartments Structure in which the transverse and longitudinal partitions are hinged to the floor.

The subdivided structure can be a folding box, in which at least one transverse and one longitudinal wall are erected. The structure can also 'have the shape of an insert for a box, which the box space in divided into several individual subjects. Another shape of the structure can be four walls Surrounded central compartments and three-walled, circumferential rooms create, 'which take up the objects and then by an impact or a cover, which is placed around the structure, can be closed. The impact or the shell close the spaces on the perimeter by they provide the missing fourth wall for this one.

A typical example of a divided box is that type of egg cartons in which hinged partitions are erected, with the Partition walls -be pushed up from the actual box blank.

"A typical example of a use to divide a box is an insert that comes in a folding box- of essentially rectangular shape inserted, a certain number of subjects, for example nine or twelve subjects, creates in the box.

Subdivided structures - of the type to which the present invention relates - generally have at least one longitudinal partition and two transverse partition walls - or at least one transverse partition and two longitudinal partition walls. The blank forming the partition walls has a bottom surface to which one or more wall surfaces are hinged along longitudinal fold lines, and it also has wall surfaces to which transverse fold lines are hinged along the bottom surface. - '"- The device, which the blank to - a n" straightens into compartments divided structure, moves the various partitions in a surface opposite to the bottom upright position. It is usually expedient to lock the partition walls erected in this way so that a partial collapse of the structure after it is erected or during the insertion of the goods is prevented.

"For example, suppose there is a box for packing nine donuts (pancakes) are divided into nine compartments by an insert, so the dividers need to stay upright when the donuts are out of the filling machine fall into the box.

The interlock 'between a longitudinal partition and a transverse partition - has - generally in the form of a projection - or a nose - on at least one - Partition wall, = where an 'edge * of the' other partition wall is pushed past this nose will. -In order to bring such a locking 'securely into engagement' it is advisable to the front wall when it is raised over angles of more than 90 ° at the nose "move past," so that the 'partition wall - in connection with it as a result of the 'Folding resistance, "dei' - occurs at its fold line, erivä s move back can and comes to a standstill at the nose in an exactly vertical position. ... - _ .- -. -,.

It has already been proposed to divide a section into a To erect the structure so that it is arranged between a punch and a mold and - by vain movement: the Förnige = depression is pressed against the punch, so the curved surfaces provided on the punch: the partition walls in one opposite one the remaining part of the blank can be folded in an upright position. at the known device, the blank is fed from above; and- the erect subdivided structures must also -na: ch-above. removed what a 'slow. Operation conditional and severely limits the rate of ejection of the device. In addition, the stamp is not in the due to inevitable mechanical limits Able to fold the partitions over an angle greater than 90 °.

It is also a raising device is known, which consists of a double-sided open, folding surfaces having die and a stamp consists of for pivoting the transverse walls with arranged at a suitable distance from each other Feet is provided. In this device, the punch is unable to remove the partitions to pivot the blanks over an angle of more than 90 °.

Finally, it is known in a joint-like device for Erecting fan-like egg boxes to provide pivoting folding surfaces, the dividing walls of the box, which are pre-folded at an angle of about 45 °, into the upright Pan position. In this device, however, the erected box must after removed from the same side from which the blank was fed.

According to the invention there is now a device for erecting a blank made of cardboard, cardboard or the like in a structure divided into compartments, with the transverse and longitudinal walls are articulated on a floor, with folding surfaces that are open on both sides having a die and a stamp, which is used to pivot the transverse walls with is provided with feet arranged at a suitable distance from one another, thereby improving that in the swivel joint fixed Vorfaltorgane are arranged for the transverse walls and that the stamp with ready-made folding elements which can be actuated in the stroke cycle and which can be moved into its recesses is provided for the transverse walls.

The invention also provides a mechanism which is able to To fold partitions exactly and force-fit, which to two or more longitudinal partitions traverse. In erecting structures of this kind it is difficult to get those parts to fold the transverse partition walls frictionally, which between the longitudinal partition walls because access to this particular space is difficult. These difficulties are particularly very large where the floor has strips or bands that are arranged in the middle between the longitudinal walls, as is the case with the special, in the execution to be described below is the case.

An example embodiment of the invention is shown in the drawing, namely Fig. 1 is the representation of an exemplary shape of a blank, which is erected into a subdivided structure by the device according to the invention can be, Figure 2 is a perspective view of a molded joint according to the invention, 3 is a perspective view of a stamp; who cut through the Pressing the die through, Fig. 4 is a perspective view of the joint of above and the stamp above, with a conveyor mechanism just one flat blank on the hinge, Fig. 5 is a perspective view of the Stamp and the mold joint in a position in which the longitudinal partitions are erected and the erection of the transverse partitions has begun, Fig. 6 a perspective view of an advanced stage of work showing the transverse partitions shows in an almost upright position, Fig. 7 is a perspective view of the die from below at a point in time at which the transverse partitions are over the 90 ° position have been moved out with respect to the floor, FIG. 8 is a perspective illustration an advanced stage of work in which the transverse partitions are released to return to a perfectly upright position with respect to the ground, and FIG. 9 is a perspective view showing the extraction of the punch from the subdivided structure, whereby this falls onto a conveyor.

The blank A of Fig. 1 consists of foldable, flat material, for example cardboard, and it is provided with cut and fold lines in such a way, that the various walls, flaps, etc. described below are formed.

The blank has central parts 11 which are connected to one another by connecting strips 12 and are delimited by longitudinal folds 13 and 14, along which longitudinal wall surfaces 15 and 16 are articulated on the central parts 11. As will be seen later, the middle parts 11 and the strips 12 form a floor between them, and the wall surfaces 15 and 16 become longitudinal partition walls which are located at a distance L, which is the distance between the longitudinal fold lines 13 and 14. Certain parts 17 and 18 of the floor protrude beyond the longitudinal fold lines 13 and 14 and later form floor surfaces of compartments which are located outside the longitudinal wall surfaces 15, 16.

Transverse wall panels 19 and 20 are articulated on the base 11, 12 along transverse fold lines 21. The wall surfaces 19, 20 become transverse partitions which are located at a distance T from one another, which is the distance between the transverse fold lines.

The transverse wall surfaces are provided with V-notches at 22, which with the longitudinal fold lines 13 and 14 are aligned. Short cuts 24 allow one elastic deflection of the apex 23 of each V-notch.

On the longitudinal walls lugs 25 are formed whose distance d from the corresponding longitudinal fold line 13, 14 is slightly smaller than the distance D of the apex 23 of the notch 22 from the Querfalthnie 21. The shape and dimensions shown allow the apex 23 of the Notch to snap past the nose 25 of the erected structure so that the notch then comes into contact with the portion 26 of the cut which is in line with the transverse fold line 21 and delimits the transverse wall surface. The erection of the blank A to form a cell-shaped structure takes place step by step by first erecting the longitudinal wall surfaces 15, 16 with respect to the base 11, 12, and then folding the transverse partition wall surfaces 19, 20 up into a position past the lugs 25, the walls 19 , 20 can be pivoted through an angle of more than 90 °. After the release, the transverse partition walls come to a standstill in a position perpendicular to the base 11, 12 and resist folding down through the action of the apex part 23, which is supported against the incline of the nose 25. The erecting operations are performed by the high-speed erecting device which will be described below. The die shown has a substantially rectangular rigid frame 28 made of angle iron, to which longitudinal wall folding members 29 are fastened by means of arms 30 and bolts 31. The arrangement of the longitudinal wall folding members 29 along each side of the molding die is cut out so that spaces 32 are created into which the ends of the side partition walls can protrude in the same way as protruding bottom parts of the subdivided structure to be erected.

On the die frame transverse wall folding members 33 are also attached, which extend along the recesses or spaces 32.

The function of the longitudinal wall folding members 29 is to grip the longitudinal wall surfaces 15, 16 and to fold them into an upright position, these forming the longitudinal partition walls in the example shown. For this purpose, the longitudinal wall folding members can be equipped with inclined upper parts 34. The transverse wall folding members 33 are similarly rounded at their upper edges 35, the slope of the upper edges 35 to the slope 34 of the longitudinal wall folding members with regard to the function of the members 33 to fold the transverse walls of the subdivided structure at right angles to the longitudinal walls, runs vertically.

The vertical surfaces 36 of the longitudinal wall folding members 29 determine one Die center space 37, through which a stamp, which will be described later, passes emotional.

Additional folding members 38 are mounted on the molding die and move into and out of the molding die center space. In the illustrated embodiment of the device, the additional folding members 38 are cup-shaped and form ends on arms 39 which are rigidly attached to a rod 40 rotatably mounted in bearings 41 and 42 on the die frame 28. The rod 40 also carries an arm 43 with a cam surface 44 which comes into contact with a pin or roller on the stem. The arm lies outside the actual die center space 37, ie outside the path of movement of the punch and the subdivided structure formed by it.

A cam rail 45 is attached to one end of the molding die frame in a substantially vertical position, while a counter rail 46 is attached to the opposite end of the frame. The special purpose of the rails 45 and 46 will emerge as the description proceeds. Suffice it to say at this point that the curved front surface 47 of the cam rail serves to deflect or actuate a movable mechanism located on the ram, while the counter-rail has the task of relieving the ram of lateral forces resulting from this actuation.

Alignment pins 48 attached to the die frame 28 serve to on the die set off blanks opposite the various folding elements and to align with other parts.

The rod 40 normally holds the additional folding members 38 in a position in which they protrude into the space 37. For this purpose the rod 40 is under the action of a helical spring 49, one end of which is attached to an arm 50 on the rod and the other end of which is attached to the frame at 51 (see also Fig. 7). The punch fitting into the die of FIG. 2 is shown in FIG. 3 and has a rod 52 which extends upwardly from a rigid head 53. A plurality of punch feet 54 extend from the head 53 in a downward direction. The punch feet 54 are arranged in a row and have bottom surfaces 55 which come into contact with the bottom of the blank.

Folders are attached to the punch head, which can move into and out of the spaces 62 between the punch feet 54. In the illustrated embodiment of the stamp arrangement, the folding elements have the form of levers 56 which are pivotably mounted in the stamp head 53 on pins 57 to which they are clamped. The opposite ends of the pins carry arms 58 which are connected to one another by an operating linkage 59. The last arm 58 carries a roller 60 which comes into contact with the front surface 47 of the cam rail 45 (see FIG. 4). A spring 61 arranged between the central arm 58 and the punch head 53 tends to hold the rocker arm arrangement in a position in which the arms keep the space 62 between the punch feet free. When the roller 60 is shifted to the left, the folding elements are pivoted into the spaces 62. For the purpose of balancing the stamp head with respect to the lateral force exerted on it, the stamp head carries a roller 63 (FIG. 4) which is arranged on an axis 64 opposite the roller 60 .

The punch assembly also carries a roller 65 which comes into contact with the cam surface 44 of the arm 43 which swings the additional folding members of the molding die out of the molding cavity 37. The roller 65 can best be seen in FIG. 4, while the contact between the roller 65 and the stop lever 43 can best be seen in FIG.

A blank conveying device which deposits flat blanks on the forming die is shown in FIG. 4. The conveyor removes flat blanks one by one from a horizontal magazine stack 66 and carries them to the forming die. The conveyor has suction cups 67 which are attached to a support arm 68 which is clamped to a conveyor rod 69. The conveyor rod is held between side arms 70 which impart the desired movement to the conveyor rod and suction cups. For an understanding of the present invention, it suffices to note that the conveyor first moves the blank along an arcuate path from the stack 66 to a position above the die, whereupon the conveyor moves in the direction of the die axis and the blank between the alignment pins 48 on the inclined Upper sides 34 of the longitudinal wall folding members 29 settled. The conveyor performs a pre-folding operation by folding the longitudinal wall surfaces 15, 16 slightly upwards relative to the bottom 11, 12 of the blank. This operation is aided by hold-down arms 71 attached to arm 68. The arms come into contact with the blank over the transverse folds 21, so that at this point in time the transverse wall surfaces 19 and 20 remain essentially in the same plane as the base 11, 12. After the blank is placed over the mouth of the hinge, the suction cups 67 release the blank, whereupon the conveyor returns to pick up the next blank. In doing so, the conveyor moves out of the path of movement of the punch, which now descends, as shown in FIG. 5. The descending punch rests on the blank base 11, 12 and presses the blank into the central space of the shaped joint between the longitudinal wall folding members, as shown in FIG. As a result, the longitudinal partition walls 15, 16 are folded into an upright position: The transverse wall folding members 33 engage the transverse wall surfaces 19 and 20 and fold them upwards at right angles to the bottom surfaces 11, 12 into an upright position. Since the punch has to pass between the transverse wall folding members 33, these members do not extend far enough to come into contact with the transverse wall surfaces 19, 20 even in the area between the longitudinal folding lines 13, 14 (FIG. 1). This is where the additional folding elements 38 (FIG. 2) come into effect and come into contact with the transverse wall surfaces 19, 20 on both sides of the connecting strips 12 (FIG. 1), which encompass the additional folding elements due to their cup shape.

In this way, centrally located parts of the transverse wall panels are created guided by the additional folding members and folded while their beyond the longitudinal wall surfaces through the fixed transverse wall folding members 33 be erected.

As soon as the additional folding elements 38 have fulfilled their function, they are pivoted out of the path of movement of the punch, which strikes the stop lever 43 with its roller 63 and rotates the rod 40 to which the additional folding elements are attached.

In the position shown in Fig. 5, the transverse wall surfaces 19, 20 are vertical and have moved over an angle of approximately 90 ° from their previous horizontal position. As far as they could erect the transverse wall folding organs: In this position, however, they have not yet moved beyond the aforementioned lugs 25 (Fig. 1), which they are supposed to lock in the upright position: At this point in time, the folding elements step on the punch, namely the rocker arm 56, in action. The actuating roller 60 ,. which causes the rocker arm 56 to pivot about its pivot axis 57, is detected by the inclined part 47 of the cam rail 45 and, as seen in FIGS. 2, 4, is shifted to the left. The arms 58 connected by the linkage 59 move as a result: to the left, while the rocking levers 56 pivot to the right, engaging the partition walls 19, 20 and moving them beyond the 90 ° position to the locking lugs 25 (Fig. 1 ) pass: During this working phase, the roller 63, which is in contact with the counter rail 46, prevents the punch from moving to the left.

Fig. 7 shows the rocker arm 56 in their fully pivoted position and the transverse walls 19, 20 in a position beyond the vertical. For the purpose of better visibility of the rocker arm 56 , part of the longitudinal wall 15 has been broken away, whereby the wall 16 is exposed behind it. In this figure, the additional folding members 38, 39 that have been pivoted completely out of the path of movement of the ram can also be seen.

. As the punch continues its downward stroke, the roller 60 moves on a receding portion of the cam rail 45; whereby the rocker arm 56 can pivot away from the transverse walls 19, 20.

Fig. 8 shows the stamp approximately in its lowest position. the Cross walls have moved back a little and are vertical, with them behind the Lugs 25 are firmly locked.

The stamp now moves out of the interior of the erected subdivided Formed out, which then falls down onto a conveyor 72.

Fig. 9 shows the completed structure at the moment; in which it goes out of contact with the stamp. The previously completed structure A 'is just continued by the conveying device 72 , the lugs 73 of which have just gripped the structure A'.

After pulling the stamp out of the molded joint, the next The blank is removed and the process described is repeated.

Claims (7)

PATENT CLAIMS: 1. Device for erecting a blank Cardboard, cardboard or the like in a structure divided into compartments, in which transverse and Longitudinal walls are hinged to a floor, with a bilateral open, folding surfaces having a die and a stamp, which is used to pivot the transverse walls with is provided with feet arranged at a suitable distance from one another, characterized in that that in the joint fixed pre-folding members (33) are arranged for the transverse walls and that the punch (52; 53) can be actuated in the stroke cycle and moved into its recesses Prefabricated folding elements (56) is provided for the transverse walls. 2. Device according to claim 1, characterized by; that the stamp stamp feet (54, 55) with expanded Has floor panels (55); next to which the near elements (56) are arranged; that they are in the rest position (Fig. 3) next to the base plates (55} and essentially lie outside the spaces (62) between the punch feet (54.55), - and in the working position (Fig: 7) extend into the spaces. 3. Device according to claim 2, characterized in; that- the folding elements rocker arm (56) -are which are controlled by a cam device (45, 60) must be operated. 4. Device. according to one of claims 1 to 3, characterized characterized in that the hinge extends inwardly from an outer frame (28) Has projections (30) between which the recesses (32) lie and that the Projections (30) from the folding members (29) folding the longitudinal walls and the lateral walls carrying folding organs (33), 5. Device according to one of claims 1 to 4, characterized in that additional folding members (38) are arranged on the joint (28) are movable in the (Fig. 2) and out of the (Fig: 7) central space (37) of the joint -are. 6. Apparatus according to claim 5, characterized in that the additional folding members (38) in the working position (Fig. 2) essentially with the fixed folding members (33) are aligned for the transverse walls. 7. Apparatus according to claim 5 or 6, characterized in that the additional folding members are designed as arms (38, 39) fastened on a common rod (40). B. Apparatus according to claim 7, characterized in that the rod (40) carries a stop lever (44) which is acted upon by the punch (65, 44) in order to pivot the arms (39) out of the punch stroke. References considered: USA: Patent Nos. 2,835,174, 2,668,482.