FI70392C - ANOFLOWER FOR OVERFLOWING FOR ETO FOERPACKNINGSAEMNE RUNT EN VARA SOM SKALL FOERPACKAS - Google Patents

Description

1 70392

Device for wrapping and sealing a packaging blank around the goods to be packaged. - Anordning fomslagning och förslutning av ett förpacknings-ämne runt en vara, som skall förpackas.

The invention relates to a device for wrapping and sealing a packaging blank around an article to be packaged, the packaging blank consisting of a rectangular protective carton forming the outer shell of the package and a wrapping paper attached to the second surface of the protective carton. by turning both ends of the protective carton around the side edges of the goods, the device comprising a device for turning the ends of the protective carton with a base and pushers above it, which can be moved towards and away from each other by a power device and at a spaced apart starting position .

The above-mentioned packaging blanks have gained great popularity e.g. for packing books for mail. A particular advantage of packaging is that, despite its simple and material-saving design, the packaging is suitable for batches of goods that vary greatly in size, quantity and shape. Thus, the same packaging blank can be used to package one or more books, and the size of the books can vary widely. The placing of the goods to be packed on the packaging blank and the sealing of the packaging blank into the final packaging has been done by hand. This is natural in that, in most cases, the consignments to be sent are sorted by hand, so that they can be transferred to the packaging blank during sorting.

However, manual sealing of the package has proven to be a cumbersome step in turning the ends of the protective carton around the side edges of the package and squeezing and holding the inverted carton ends firmly against the surface of the package while pushing the package into a tape wrapper. In order to achieve a tight package, when the ends of the protective cardboard are turned, considerable compressive forces must be applied to the package and the overlapping ends of the protective cardboard must be pulled towards each other. In practice, it has been shown that it is this work that causes the wrists to become overstressed and sore.

On the other hand, a large number of different packaging sealing machines are known, but so far no machine has been proposed which is suitable for sealing said types of packages of varying width and thickness. For example, DE patent 388 333 deals with wrapping a strip around thin, standard-sized sheets. This device would not be suitable for closing book packages of varying width and height.

The object of the invention is to provide a device for closing packages of said type, of different widths and heights, so that the just-mentioned step of stressing the wrists can be performed by machine.

This object is achieved by a device according to the invention on the basis of the features set out in the appended claims.

One embodiment of the invention an example embodiment is described with reference to the accompanying drawings, in which Figure 1 shows a device according to the invention seen from the side, the left side being partially in section, and Figure 2 shows the same device seen, the left-suojako TELON 16 being removed.

Before describing the device, a packaging blank is considered, which is the starting point for the development of the present device. This packaging blank is described in more detail in the applicant's international patent application publication WO 83/02764. The packaging blank consists of a rectangular protective cardboard 4, on one surface of which a wrapping paper 5 is attached to its central area crosswise with the cardboard 4. In this case, the ends of the package can be closed by first turning the ends of the wrapping paper 5 around the end edges of the article 6, the length of the paper 5 being chosen so that its ends overlap and can be fastened together, e.g. with tape 17. The side edges of the package can then be closed by turning both ends around the side edges. The ends of the tongue 4 of the protective card 3 70392 also overlap as shown by the dotted lines in Fig. 1, after which the binding tape can be wrapped around the package. There are machines on the market from several different manufacturers to wrap the binding tape around the packaging. Thus, in this application, the structure of the machine in question is not discussed in more detail, but the binding tape wrapping device 2 is shown schematically in Figures 1 and 2. The package must be inserted into the opening 2a of the binding tape wrapping device 2 so that the binding tape can be wrapped around the package.

The turning device of the ends of the protective board 4 is generally indicated by the reference number 1. The turning device is constructed on a base 11 which can be moved on the sliding guides 14 towards and away from the binding tape wrapping device 2. The most important part of the turning device 1 are pressing members 7 which can be moved back and forth, i.e. towards and away from each other by pneumatic piston cylinder devices 8. Below the pressing members 7 are pusher plates 10 fixed to the part 13 formed by the vertical side plates 11. on the slide guide 12 so that the part 13 with the pusher plates 10 can be moved back and forth towards and away from each other. The vertical side plates of the part 13 have curved guide grooves 9 in which the guide pins 9b at the base end of the arms 7a of the pressing members 7 engage. In this case, the pressing members 7 move along a curved path 9a, which at the end of the movement is directed sharply downwards towards the upper side of the packaging blank 3. The piston rod of the piston-cylinder device 8 engages a pin 7b extending between the base ends of the arms 7a.

The outer ends of the slides 14 are supported by legs 15. In Figure 2, the right side has the same mechanism under the protective housing 16 as the left side.

The operation of the device is as follows. A packaging blank, the wrapping paper part 5 of which is wrapped around the article to be packaged, such as a book 6, and secured e.g. with tape 17, is placed between the pusher members 7 and 4 70392 between the pusher plates 10. Prior to that, the distance between these members has been adjusted to suit the package to be packed. When the packaging blank 3 is pressed between the parts 7 and 10, the ends 4 of the protective cardboard automatically turn upright. It is now possible to start the piston-cylinder devices 8, which are controlled to start their working stroke at different times, so that the pivotable ends of the cardboard 4 are made to overlap without colliding with each other. The piston-cylinder device 8 is pulled down, e.g. by a spring force, whereby it first pushes the part 13 in front of it before the pins 9b can slide in the groove 9. In this case, the pusher plates 10 are first pressed against the side edges of the packaging blank 3. When the compressive force exceeds a certain limit, which can be adjusted e.g. by adjusting the force of the spring pulling the piston-cylinder device 8 downwards, the pins 9b begin to slide in the groove 9, whereby the piston-cylinder device 8 also turns slightly upwards against said spring force. The shape of the guide groove 9 can be used to determine the trajectory 9a of the pressing device 7. When both piston-cylinder devices 8 have completed their working stroke, the turning device 1 of the protective cardboard ends is moved in its entirety by the slide 14 towards the binding strip wrapping device 2 until the end of the packaging blank 3 is sufficiently inside the opening 2a of the binding device 2. The device 2 then wraps the binding tape around the end of the package immediately next to the edge of the base 11.

It will be appreciated that the thickness of the article 6 to be packaged may vary within wide limits without affecting the operation of the device. The starting position of the parts 7 and 10 can also be easily arranged to be adjusted, e.g. using movable limit switches, whereby the width of the goods 6 to be packed can vary. Also, the length of the article 6 to be packaged (vertical dimension in Fig. 2) can vary substantially, since the only condition is that the article remains inside the side edges of the protective carton 4 (top and bottom edge of the carton 4 in Fig. 2). The device both speeds up and simplifies packaging when using this type of packaging.

Claims (4)

Device for sealing and sealing a packaging material (3) around a product (6) to be packaged, since the packaging material consists of a rectangular-shaped protective box (4) forming the outer shell of the package, and of one of the protective box the wrapping paper (5) can be closed by folding the wrapping paper (5) over the projecting portions around the product and the side edges of the packaging can be closed by folding both ends of the protective box (4) around the side edges of the product; wherein to the device is a folding device (1) for the end of the protective box, comprising a support (11) and above the existing sliding means (7), which can be moved towards and from each other by means of a force device (8) and in each other from each other The starting position of the package blank (3) can be placed on the base (11) for closing the package, characterized in that, together with a slide guide (12), they are movable towards and from each other pouring discs (10) following portions (13) have other wear guides (9), on which the sliding means (7) can continue their movement towards each other as the pouring discs stop and are pressed against the side edges of the package, the sliding means (7) being controlled to move on said second slide guide (9) along a cup-shaped path (9a), which, at the final stage of the sliding movement, bends upwards downwards to guide the sliding means (7) towards the upper surface of the packaging blank (3). 2. Device according to claim 1, characterized in that the force device (8) is arranged to move the sliding discs (10) against the side edges of the package (3) until the pressure means (7) begin to move along said beak-shaped path (9a). Device according to Claim 1 or 2, characterized in that the force devices (8) of the pressure means (7) are controlled to carry out their work stroke at different times.