DE2805388A1 - DEVICE ON A CARTONING MACHINE FOR SEALING FOLDING BOXES - Google Patents

Description

2305388

Robert Bosch GmbH VM 627

Stuttgart

State of the art

In automatic cartoning machines, folding boxes are generally glued, using cold or Hot glue, sealed. Almost all types of glue used set or solidify a short time after application, regardless of whether the locking tabs have already been fully applied or are still open. Especially with Cartoning machines with continuous folding box throughput lie between the application of glue and the end of the application of the Closing flaps one or more stations, whereby the closing mostly takes place by means of fixed guide switches, by guiding them, the closing flaps are automatically applied as the folding boxes pass through, so that no further moving parts are required.

If a cartoning machine is used, e.g. to remedy any If the malfunction is stopped and only switched on again after the glue has set, one inevitably remains or several folding boxes partially or completely: unglued. Such folding boxes can then no longer be automatically packaged further. Then you have to go with be excreted more or less with great effort and are generally unusable.

909034/0013

Robert Bosch GmbH "VM 627

Stuttgart

One way to avoid these disadvantages is to use additional immediately after the machine has been shut down movable elements, such as locking flaps "all locking tabs to apply and press on that have already been glued. However, this is only possible given when it is ensured that all sealing flaps have been glued. However, the latter is only the case when the cartoning machine comes to the Stilüdfcand in a defined position (so-called "home position"), in the no flap is only partially glued. Furthermore, there must be such a large gap between two continuous folding boxes exist that the glue application devices, e.g. glue wheels or spray nozzles, together with those located in their area Guide switches allow the locking tabs to be put on.

However, experience has shown that this is often the case with cartoning machines Failure situations occur for which the accident prevention regulations and also the protection of the machine against overload require an immediate stop (emergency stop), the standstill occurs the cartoning machine in any position, including outside the so-called "home position". Here result again unglued folding boxes, so that

909834/0033

Robert Bosch GmbH VM 627

Stuttgart

the difficulties and disadvantages already described arise. Precautions must therefore be taken that regardless of the time of stopping the Cartoning machine a complete gluing of the closure flaps guarantee.

Advantages of the invention

The device according to the invention with the characteristic Features of the main claim has the advantage that through the displacement of the glue application devices and the closing elements against the direction of travel of the folding boxes from the time the cartoning machine comes to a standstill on, a complete gluing of the closure flaps and thus a proper closing of the folding boxes is ensured.

The measures listed in the subclaims are advantageous developments and improvements of the The device specified in the main claim is possible. Another advantage is that it is due to the device according to the invention is possible, also folding boxes to process that are so wide that they largely fill the division between two drivers.

909834/0033

Robert Bosch GmbH VM 627

Stuttgart

drawing

An embodiment of the invention is shown in the drawing using three figures and in the following Description explained in more detail. 1 shows a schematic representation of a side view of the invention Device, FIG. 2 shows a section along the line II-II of FIG. 1 and FIG. 3 shows a section the line III - III of FIG. 1.

As the figures show, on a carriage 1, which is slidably mounted on guide rails 2, glue applicators 3, closure elements 4- and photoelectric Scanning devices 5 attached. To move the entire carriage 1 on the guide rails 2 is a Threaded spindle 6 is provided, which can be driven by an electric motor 7. To operate the locking elements 4- and A pneumatic cylinder 8, like the arrows 11 and 12, is used to apply the closure flaps 9 of the folding boxes 10 As can be seen in FIG. 1, the sliding movement of the carriage 1 takes place counter to the transport direction of the folding boxes 10.

909834/0033

280538a

Robert Bosch GmbH YM 627

Stuttgart

The device works as follows:

When the carton ice machine comes to a standstill, a photoelectric scanning device 5 checks, for example, whether the glue applicators 3 are still in the area of a folding box 10 and the closure flaps 9 of this folding box 10 have not yet been completely glued. If the glue applicators 3 are still in the area of a folding box 10 at this point in time, the scanning device 5 sends a pulse to the electric motor 7) via electrical or electronic control devices (not shown) so that the carriage 1 is displaced over the threaded spindle 6 in the direction of arrow 12 will. If the position of the scanning device shown in phantom in FIG. 1 is reached, the electric motor 1 is switched off and the glue application devices 3 switched off via a further pulse, likewise with the interposition of the electrical or electronic control devices (not shown). The closure elements 4 are then actuated by the pneumatic cylinder and thus the closure tabs 9 are immediately placed on the folding box 10 and pressed on for some time. After the closing elements 4 have been moved back into the position shown in FIG. 3-, the carriage.1 and thus the glue application devices 3? the closing elements 4 and the scanning device 5 are moved back into the starting position.

9834/0033

Robert Bosch GmbH YM 627

Stuttgart

Instead of the glue application devices 3 designed as spray nozzles in the exemplary embodiment, any other device can also be used Glue applicator, e.g. a glue applicator, use Find. There is also the possibility of using mechanical scanning devices instead of the photoelectric scanning device to use. The closing elements 4- can also be driven purely mechanically.

It should also be mentioned that folding boxes can also be processed with the device according to the invention can that are so wide that they largely fill the division between two drivers.

The application of the closure tabs 4- can both during the displacement of the carriage 1 and only at the end of the displacement movement of the slide 1. Instead of the type of sliding movement shown, a pneumatic one can also be used or mechanical design can be used.

909834/0033

Claims (4)

vm 62? Pf / vo 6.2.1978 Robert Bosch GmbH, Stuttgart Expectations f 1.jVorrichtung on a cartoning machine for closing folding boxes whose closure flaps have not yet been or only partially "glued" due to a temporary standstill of the cartoning machine, characterized in that the glue application devices (3) provided for gluing the closure flaps (9) together with additional Closing elements' (4-) for the closing flaps (9) are designed and arranged to be displaceable against the running direction of the cartoning machine. 2. Apparatus according to claim 1, characterized in that the glue application devices (3)> closing elements (4) and the like on a slide which can be moved on guide rails (2) (1) are attached. Device according to claims 3 · Λ and 2, characterized in that there is provided for displacing the carriage (1) driven by an electric motor (7) the threaded spindle (6) or the like.. GRiGINAL! MSPECTED 90983 4/0033 Robert Bosch GmbH TM 627 Stuttgart 4. Device according to claims 1-3, characterized in that that for actuating the closing elements (4) for the closing tabs (9) one or more pneumatic cylinders (8) are provided. 5. Device according to one or more of claims 1-4, characterized in that to control the displacement movement of the carriage (1), the glue application time and of the closing elements (4) a photoelectric scanning device (5) is provided, which is connected to known electrical or electronic control units is. 909834/0033