DE3417326A1 - MACHINE FOR MAKING FOLDING BOXES FROM CUT-OUT - Google Patents

Abstract

1. Machine for producing folded boxes from blanks, in which a blank is withdrawn in each case from the bottom of an exchangeable magazine (4), is laid on two mutually parallel guiding rails (2, 3), is conveyed by means of a conveying system (21) to an exchangeable shaping system (6) comprising an end stop for completion of the folded box, wherein a bonding substance is applied at predetermined points of the precut blank by means of an applicator device (13) and in which the shaping system (6) comprises a plunger (7) as well as a shaft (12) situated thereunder and open at the top and bottom, characterized in that the two guiding rails (2, 3) are adjustable in their mutual horizontal spacing, that the magazine (4) has two downwardly extending and mutually opposite lateral fixed stops (20) against which the displaceable guiding rails may be brought into abutment, that each guiding rail (2, 3) in a manner known per se carries at least one applicator head (13) adjustable in the longitudinal direction of the rails and vertically thereto, and that there is provided for each applicator head a switch (33) for placing the applicator head in operation, which is longitudinally adjustable, and operated by an entraining finger (23) of the return leg of an endless conveying system (21).

Description

-A-

Applicant: Greif-Werk Maschinenfabrik GmbH,

Kronsford Landstrasse 177, 2400 Lübeck

FOLLOW-UPj

Machine for the production of folding boxes from blanks

The invention relates to a machine for producing folding boxes from blanks, in each of which a blank is removed from an exchangeable magazine below, by means of several Application heads are provided with a connector substance at predetermined locations and then an exchangeable molding device to complete the packaging is fed, the forming device from a stamp and from one below located, open at the top and bottom, aligned with the punch shaft.

In a known machine of this type are those operated with glue Application heads arranged in the removal area of the magazine, with regard to the areas to be provided with glue of the respective blank a corresponding number of application heads is provided. The blank, which has been removed and provided with glue, is transferred to the molding device by means of a swivel device conveyed / where it must be centered over the shaft. For the respective alignment of the application heads and the centering of the blank over the shaft is

) The corresponding holding and adjustment brackets provided with spindles and cranks

REEDED

or centering devices are provided, which are complex in construction and cumbersome and time-consuming to operate when a Another blank size is to be processed in the machine, since in this case both the magazine and the forming device is replaced. Furthermore, the application of glue to the predetermined areas of the blank is imprecise, since the application heads are relatively far away from these areas and thereby overcome a fairly large spraying distance or the like must be, which also results in increased glue consumption.

The object of the invention is to provide a machine of the initially mentioned type, which with regard to the Adjustability of the application heads and the centering of the blank is simplified in the molding device and allows precise application of the connector substance.

The solution is based on the specified machine and is characterized in that the machine has two parallel, Guide rails for receiving, which can be adjusted horizontally from one another and run from the magazine to the forming device of the blank to be processed has that the magazine has two opposing, fixed stops for the has guide rails adjustable relative to them that each guide rail carries at least one application head that

[NACHGER EtOHT

a conveyor device to j

cut under the guns to the former j

i promotes and that the rear area of the j

Shaft with a protruding between the two guide rails End stop for the incoming cut is provided.

This solution eliminates the need for complex spindle and crank adjustment devices to adjust the

) Application heads and the centering in the molding device new j

to be able to adjust. Instead, after the change, U

of the magazine and molding device only the two continuous ti guide rails to be adjusted in the lateral direction, which are only brought to bear against the associated stops of the new magazine. As a result, a lateral positioning adjustment for the blank in the molding device also takes place at the same time, so that the blank in question is finally centered by the end stop of the new shaft. Since the application heads are already firmly connected to the guide rails, they are also automatically adjusted in the lateral direction, with no readjustment being necessary in terms of height in many cases. Furthermore, more space is now available for attaching the application heads, since they can be conveniently provided between the magazine and the molding device. In addition, the guns

- 7 AFTER eERElOHTj

can now be set at a precise distance from the blank moving past under them, so that a precise verb inder to carry, preferably, · glue, can be made, whereby it is also possible to apply a dot or stain application or a line application. Finally, each guide rail only needs to be provided with an application head in order to be able to apply glue to all of the required locations on the associated side of the blank.
10

The invention is explained in more detail below with reference to an embodiment shown in the accompanying drawing. Show it:

Figure 1 is a longitudinal section through the embodiment,

Figure 2 shows a folding box blank in plan,

Figure 3 shows a section along the line A-A in Figure 1,

FIG. 4 shows a plan view of the representation according to FIG. 3,

5, 6, 7 cross-sections along the lines B-B, C-C and D-D in

Figure 1.

According to Figure 1, the machine consists of the usual, not explained in detail frame 1, the two parallel to each other and horizontally extending guide rails 2 and 3 and further above the one end region of the guide rails

NACHQEREJOHTI

with a magazine 4 for receiving a stack of folding box blanks 5 and in the other end area of the guide rails with

a molding device 6 is provided. The molding device be s stands out from a just above the guide rails 2, 3 in

Rest position located stamp 7, which is at the lower end of an i

vertical carrier 10 guided by pairs of rollers 8 and 9;

and fixed by means of a pressure acting on the carrier 10 I

central cylinder 11 is movable in the vertical direction, and |

from a below the stamp 7 and aligned on this, |

and shaft 12 open at the top and bottom. Between the magazine |

4 and the forming device 6 is sufficient in the horizontal direction |

There is space provided to connect application heads 13 to the filling *

NEN 2 and 3 to be able to attach so that the application heads easily |

are accessible and in the horizontal direction in a wide j

Range can be adjusted, it is also possible i

to provide several application heads 13 on a guide rail, "

what kind of folding box blanks to be processed |

depends. The or each application head 13 of a guide rail j

2 or j is also vertical in a manner known per se; Direction adjustable.

As can be seen better from Figures 3 and 4, the
Guide rails 2 and 3 are L-shaped in cross section
and arranged so that each leg of the rails after
above, while the other two legs are horizontally

- 9 SUBSEQUENTLY

run, facing each other. Thus, a can from the stack 5 of the magazine 4 below by means of a conventional suction gripper device 15a removed blank 14, which can be clearly seen in Figure 2, placed on the guide rails and by means of a conveyor device 15 arranged below and between the guide rails from the area of the magazine 4 to the molding device 6 are promoted. Here, the blank 14 is passed below the application heads 13 and provided with a connector substance, as will be explained below.

As can be clearly seen from FIGS. 3, 4 and 7, the guide rails 2 and 3 are on transverse twin bars 16 fastened adjustable transversely to its longitudinal direction. The twin bars each consist of two parallel rods 16a, b, which form a slot 17 between them (FIG. 4) through which struts connected to the guide rails 2 and 3 18 protrude upwards, where the usual, hand-operated Attack clamping members 19. The guide rails are thus adjustable at a horizontal distance from one another and by means of the Clamping members 19 can be determined.

As FIGS. 1 and 6 show, the magazine 4 has two fixed, opposite, lower and arm-shaped stops 20 provided that extend so far down,

tr Φ * i

j SUBMITTED

that in each case a guide rail can come to rest against such a stop on the inside. This makes the guide rails can be easily adjusted to a newly inserted magazine 4, so that the blank removed at the bottom 14 is easily aligned in the lateral direction when it has been placed on the guide rails 2, 3.

The conveyor 15 consists of a conventional endless conveyor 21, which have, for example, a rocker arm drive chain 22 can, which is provided with driver fingers 23 with which the blank 14 is conveyed along the guide rails 2, 3 will. The conveying device also consists of a pushing device 24 connected to the endless conveyor 21, which takes over the blank 14 from the conveyor 21 and conveys it to the end position in the forming device 6. the Sliding device has a sliding arm 25, which is resilient in the vertical direction, with a sliding element 26 which, against the blank 14 to be conveyed comes to rest. In the starting position of the sliding arm 25 this lies against an upper one Guide 27, which pressed the blank 14 downwards holds when it runs over the sliding arm 25.

The sliding arm 25 is attached to a reversible drive cylinder 28, at the front end of which is a stop-operated, Usual reversing element 29 is provided. This overturning

FOLLOWED

element 29 comes to rest against a stop 30 when the blank 14 has reached its end position in the forming device 6. The drive cylinder 28 then moves back to its starting position (FIG. 1).
5

As already described, the shaft 12 is the molding device 6 interchangeable. For this purpose, each shaft 12 is connected to a frame 31, which in turn is attached to the frame 1 attached to the machine. This enables the shaft 12 to be exchanged quickly. Is in further development the rear area of the shaft 12 in the forward direction with a provided fixed end stop 32, which protrudes into the area between the .beiden guide rails 2 and 3, as on can best be seen from Figure 3. This end stop defines the end position of the seen in the direction of the molding device 6 funded blank 14 firmly, as Figure. 1 shows. The punch 7 of the molding device aligned with the shaft 12 6 can now be moved down to press the blank 14 into the shaft 12 and thereby the The final shape of the blank 14 is formed into a finished folding box te1.

On the frame 1 of the machine are also in the area of the return run of the endless conveyor .21 a plurality of electrical switching elements 33 are provided, each of which is assigned to an application head 13

- 12 -

FOLLOWEDJ

and control their operation. The control takes place in such a way that the driver fingers 23 of the driver chain 22 on the switching elements 33 pass and interrupt or reflect a working beam of the elements, causing the operation of the guns switched on or ended. The switching elements 23 thus preferably consist of conventional transmitting and receiving elements. These switching elements are attached to arms 34, the other hand in the longitudinal direction of the return strand of the endless Conveyor chain 22 are arranged to be adjustable and can be locked by means of known clamping elements 35.

A supplementary functional description follows below.

It is assumed that a blank according to FIG. 2 is to be shaped into a folding box, the resulting Folding box is called a so-called tray. It should be noted, however, that such cuts in the above machine described can be processed, which as a finished

• term folding box have a lid. The folding boxes are generally made of cardboard or paperboard material.

The blank 14 deposited on the guide rails is moved by means of the conveying device 15 in the direction of the forming device 6 promoted. As soon as the blank is under the application heads 13

SUBMITTED j

runs through, causes a customary sequential circuit that is controlled by the Switching elements 33 is controlled so that the blank 14 is stopped and / or the application heads 13 are put into operation. In the case in which a point or spot application is to be carried out, as indicated in FIG. 2, the blank 14 stopped and the application heads 13 are operated briefly, so that an application of a binding substance from Can consist of glue or an adhesive, but preferably consists of hot glue, on the corresponding tab parts of the blank can be made. The procedure here is such that the blank 14 is moved forward discontinuously, in order to be able to carry out the point application at the required points. In the case of using several application heads one after the other the blank 14 is stopped only once, so that all dot jobs are done at the same time. It is straightforward understandable that a line application with one or more application heads can be made on each side of the blank can, the blank then moving on during the application process. Here, too, several order working heads at the same time.

If the blank 14 provided with a binding substance has arrived in the forming device 6, it is immediately centered there, so that the punch 7 can move down in order to press the prepared blank into the shaft 12 in the usual manner.

J SUBMITTED

The side flaps of the blank 14 are folded upwards in a known manner, the flap parts to be connected being brought into contact with one another, see above
that they can connect. Depending on the required setting time, the shaped blank 14 remains in the shaft 12 for a correspondingly long time, as can also be seen from FIG. The punch 7 has meanwhile moved back so that a new blank 14 can be pushed into the forming device 6. There then takes place a renewed decline of the stamp 7, the respective lowermost folding box 36 in the shaft 12 from the

Chute is ejected below and brought to a discharge conveyor 37.

In the example described above, the application head is 13
or the application heads 13 are each assigned to the corresponding guide rails 2 and 3, respectively. As an alternative, it is also possible to proceed in such a way that between the opposite
Application heads 13 one or more application heads are provided if this is desired for corresponding blanks.
Seen in the transverse direction of the guide rails are then for example

three application heads 13 are provided.

Claims (6)

Patent Attorneys, ''.,. "~ '** .-" «" J "* Dr. Hugo Wilcken ..:., "R" .. .. '' .- 'Dipl.-ing, Thomas Wilcken 3417 3 26 Sample web 1 ■ 2400 Lübeck 1 Applicant: Greif-Werk Maschinenfabrik GmbH, Kronsford Landstrasse 177, 2400 Lübeck IMACHGREICHT 'I claims 1. Machine for the production of folding boxes from blanks, each with a blank from an exchangeable magazine Taken from below, provided with a connector substance at predetermined points by means of several application heads and then fed to an exchangeable forming device for completing the folding box, the forming device from a stamp and from an underlying, open at the top and bottom, aligned with the stamp Shaft consists, characterized in that it has two mutually parallel, at a horizontal distance from each other adjustable guide rails (2, 3) running from the magazine (4) to the forming device (6) for receiving the to be processed blank (14) has that the magazine (4) has two opposing, fixed stops (20) for the guide rails (2, 3) adjustable relative to them, that each guide rail (2, 3) at least an application head (13) carries that a conveyor (15) underneath the blank (14) deposited on the rails the application heads (13) through to the molding device (6) and the rear area of the in Vorriehtung NAOHARELCHTT Shaft (12) with a fixed one between the two guide rails (2, 3) protruding end stop (32) for the incoming blank is provided. 2. Machine according to claim 1, characterized in that the Guide rails (2, 3) by means of manually operated clamping elements (19) attached to transverse twin bars (16) are. 3. Machine according to claim 1 or 2, characterized in that the application head or heads (13) of each guide rail (2, 3) in the longitudinal direction of the rail and vertically \ bar is or are. i 4. Machine according to one of claims 1 to 3 _f thereby marked j shows that the conveyor (15) consists of an endless \ conveyor (21) with driver fingers (23) and from a i pushing device (24) connected to the endless conveyor] consists. * ! 0 ^] 5. Machine according to claim 4, characterized in that the Pushing device (24) a vertically resilient pushing arm: (25) which is attached to an axially movable drive cylinder (28), and that at the front end of the drive cylinder a stop-operated reversing element (29) - 3 SUBSCRIBE YEARS is provided for the cylinder. 6. Machine according to claim 3 and 4, characterized in that each application head (13) one from the driver finger (23) of the return run of the endless conveyor (.21) actuated, longitudinally adjustable switch (33) for putting the application head into operation is assigned.