DE102013014842A1 - Device for handling folding cartons - Google Patents

Abstract

The invention relates to a device (10) for handling folding boxes (12) with a magazine (14) for receiving folded folding boxes (12), with a transport device (16) for removing erected folding boxes (12), which has a stop (18 ) for the folding boxes (12), and with a transfer device (20) for removing folding boxes (12) from the magazine (14) and for pressing against the stop (18) for the purpose of erecting and for depositing on the transport device (16 ), wherein the transfer device (20) has a number n about a fixed first axis of rotation (22) rotatably driven by motor, rigidly interconnected cantilever arms (24), where n is a natural number and greater than one, wherein at the free end (26) each cantilever arm (24) is rotatably arranged about a cantilevered arm (30) supporting a suction assembly (32) about a second axis of rotation (28) parallel to the first axis of rotation (22), each pivoting arm Suction arrangement (32) has at least three suction devices (34), which can be acted upon by a negative pressure source for sucking the folding boxes (12), and wherein each extension arm (24) is coupled to the associated suction extension (30) in such a way that the rotation of the suction delivery arm ( 30) opposite to the direction of rotation of the cantilever arm (24) and at n times the angular velocity of the cantilever arm (24). According to the invention, it is provided that the suckers (34) form the corners of a polygon and that the rotation of the associated suction arm (30) predetermined by coupling with the at least one arm (24) can be superimposed by another motor drive (48).

Description

The invention relates to a device for handling folding boxes according to the preamble of claim 1.

Such devices serve to take out in a magazine folded boxes, in particular made of paper or cardboard, which are folded together for the purpose of transport for volume reduction, from the magazine to unfold them so that they can be provided as packaging material, and they a transport device which removes them for filling and further processing. It is known to suck the cartons by means arranged on cantilever arms suckers on an outer surface and to remove it from the magazine. An erecting of the cartons takes place in that the adhering to the suckers cartons are pressed individually with a fold having edge against a stop, so that they unfold and upright. Such a stop is usually arranged directly on a conveyor belt, so that the cartons can be dropped directly after or already during erection by removing the negative pressure from the suckers or by short-term loading of the teat with overpressure on the conveyor belt. Since the suction arms carrying boom arms in the prior art devices perform a rotational movement and the suckers for safe removal must be placed almost simultaneously on the surface facing them a magazine located in the carton, the sucker each arm are arranged in a direction parallel to the axis of rotation line. This, however, has the disadvantage that just cartons with large dimensions can swing during transport from the magazine to the stop at the high speeds occurring here, so that they often do not impinge on the stop in the desired manner. This can lead to incorrect unfolding and incomplete erection of individual cartons, which are then no longer usable for filling and further processing.

To counter this disadvantage, was in the EP 0 159 415 B1 proposed to provide a stationary vacuum cleaner, which is recognized on the suction cups on the boom side facing away from the carton and this already erects partially before hitting the stop. However, this solution is expensive.

It is therefore an object of the invention to provide a device of the type mentioned in such a way that it allows a more reliable erection of the cartons.

This object is achieved by a device having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.

The invention is based on the idea, on the one hand aufzuspannen a surface arranged by the arranged on a cantilever suction, so that the suction of the cartons can be done not only along a line, but flat. A fixing of the cartons to the suckers in particular near each of their corners allows a better defined transport of the cartons to stop, as their vibrations are minimized during transport. On the other hand, the superimposition of the rotation achieved by the coupling with the cantilever arm of the respective suction arm having the suction means provides a possibility of placing the teat which spans an area almost simultaneously on the carton to be removed from the magazine. For this purpose, the predetermined by the rotation of the cantilever arm rotation of the suction boom is first expediently superimposed on an opposite rotation, which is subsequently reversed by a reverse rotation. By this measure, it is possible for the suction arrangement with the suction pads spanning an area to impose a nearly linear movement, so that the surface defined by the suckers is aligned almost parallel to the surface of the folding box to be removed, when the suckers of the folding box approach, while by the reverse rotation, a rapid retraction of the suction assembly is possible with an adhering to her carton.

The coupling of the rotation of the Saugauslegers with the rotation of the cantilever arm carrying it is expediently characterized in that the transfer device has a stationary first Kraftübertragungsrad which is rotatably mounted about the first axis of rotation and driven by the further motor drive, that each suction boom fixed to a associated second rotary axis rotatable, the latter is connected as a central axis having cantilever shaft, and that the first power transmission is coupled by power transmission means with each of the cantilever shafts. Since the first power transmission wheel does not rotate with the cantilever arms, it inevitably transmits, via the power transmission means, a force to each of the cantilever shafts, resulting in a rotation of the respective suction cantilever. In addition, the approach of the sucker to the cartons located in the carton optimizing further rotation of the suction arm can be achieved in a simple manner by acting on the first power transmission by means of the further motor drive.

Conveniently, the first power transmission wheel is coupled via a first belt to a second power transmission gear fixedly connected to one of the power takeoff shafts, wherein one revolution of the first power transmission wheel causes n revolutions of the second power transmission wheel. A coupling of the first Kraftübertragungsrads with the other boom shafts is advantageously carried out in that with each of the boom shafts, a third power transmission is fixedly connected and that the identically formed power transmission wheels are connected to each other by means of a second belt.

Advantageously, each suction assembly is given a rotational movement about a respective second axis of rotation parallel, extending through the respective suction boom third axis of rotation by each Saugausleger wearing a fourth Kraftübertragungsrad that is rotatably mounted on the suction arm about the third axis of rotation and is thus coupled to the associated arm shaft in that it rotates counter to it, the fourth power transmission wheel being fixedly connected to the associated suction arrangement. It is preferred that each of the suction assemblies is eccentrically connected at a distance from the third axis of rotation fixed to the respective fourth Kraftübertragungsrad, so that the plane spanned by the suction plane has the smallest possible distance from the third axis of rotation. This is preferably achieved in that each of the suction assemblies is fixedly connected at an attachment point to a rotatable about the associated third axis of rotation, the third axis of rotation as a central axis having Sauganordnungswelle and that the third axis of rotation between the attachment point and the plane defined by the suction plane is arranged. It is preferred that each of the Sauganordnungswellen carries the associated fourth Kraftübertragungsrad and is firmly connected to it and that each of the fourth power transmission wheels is coupled by means of a third belt with a boom-fixed fifth Kraftübertragungsrad on associated cantilever. A rotation of the suction arm about the second axis of rotation then necessarily results in an opposite rotation of the associated suction assembly about the third axis of rotation.

According to an advantageous embodiment of the invention, it is provided that the vacuum source is connected to each suction assembly via a line having a connected by a fixed to the boom arms, rotatable about the first axis of rotation and the first axis of rotation as the central axis having central drive shaft extending in the longitudinal direction section has, which is connected by means of a rotary feedthrough with the vacuum source. By virtue of this measure, each suction arrangement can be acted upon by the line belonging to it individually with negative pressure or overpressure, so that a targeted application of overpressure and underpressure is possible at any time by appropriate control of the vacuum source. This inventive solution is also applicable to conventional, known from the prior art devices according to the preamble of claim 10. In this case, it is preferred that a plurality of lines leading to different suction arrangements each have a section running in the drive shaft, wherein the sections each extend at a distance and parallel to the first axis of rotation and are each connected to the vacuum source via a separate rotary feedthrough.

In the following the invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. Show it

1 a device for handling folding cartons in side view;

2 the transfer device of the device according to 1 in perspective view and

3 the device according to 2 in a horizontal section.

The handling device shown in the drawing 10 for folding cartons 12 has a magazine 14 in which the folding boxes 12 are folded up. The front and rear covers of the cartons in the embodiment shown here for use as pizza boxes folding cartons lie against each other, and the cartons are provided with folds, along which their cardboard material is bent when erecting. The folding boxes 12 are for further processing on a transport device 16 placed on and before laying each with a provided with a fold edge against a stationary stop 18 pressed and erected by this pressing. The transport device 16 transports the cartons 12 to a filling station, not shown in the drawing, in which it is filled with frozen ready-made pizzas and then sealed.

To remove the folding boxes 12 from the magazine 14 and to their transfer to the transport facility 16 is a transfer facility 20 provided, which three rigidly interconnected to one centered by a central drive shaft 21 extending first axis of rotation 22 rotatable and extending from this at equal angular intervals to each other radially extending cantilever arms 24 having. At the free end 26 each of the extension arms 24 is one around a boom arm, centered by a cantilever shaft 27 extending second axis of rotation 28 rotatably mounted and rotationally fixed with the boom shaft 27 connected suction boom 30 disposed at the second axis of rotation 28 opposite end in each case a suction arrangement 32 with several, a rectangle spanning suckers 34 is arranged. Each of the suction arrangements 32 is eccentric about a third axis of rotation 36 rotatable on the suction boom 30 arranged, which centrally through a fixed to the respective suction arrangement 32 connected suction arrangement shaft 37 runs.

The boom arms 24 be by a motor drive not shown with constant angular velocity about the first axis of rotation 22 turned. The first axis of rotation 22 also runs centrally through a first, fixedly arranged gear 38 that is not common with the cantilever arms 24 is driven. The first gear 38 is about a first timing belt 40 with a second gear 41 connected, the rotation with one of the boom shafts 27 and the associated second axis of rotation 28 rotatable on one of the extension arms 24 is arranged. On each of the jib shafts 27 is also a third gear 42 arranged rotationally fixed, and the three identically formed third gears 42 are by means of a second toothed belt 44 connected together, leaving the rotation of one of the boom shafts 27 the rotation of all boom shafts 27 with the same angular velocity results. The extension arms turn 24 around the first axis of rotation 22 clockwise, resulting in fixed first gear 38 a rotation of the third gears 42 counterclockwise with a ratio of 3: 1, with one turn of the cantilever arms 24 around the first axis of rotation 22 in three turns of the suction booms 30 around the second axes of rotation 28 results. With each of the suction arrangement waves 37 is a fourth gear 46 rotatably connected, that via a third toothed belt 45 each with a fixed to the associated boom 24 arranged fifth gear 47 connected is. The gear ratio between the fourth gears 46 and the fifth gears 47 is 1: 1, so that from one revolution of each boom shaft 27 counterclockwise one revolution of the associated Sauganordnungswelle 37 in a clockwise direction.

By means of another motor drive 48 whose power with a drive belt 50 on the first gear 38 is transferable, this can be around the first axis of rotation 22 be turned back and forth. In this way, by the rotation of the cantilever arms 24 around the first axis of rotation 22 predetermined, by means of the first gear 38 on the second and third gears 41 . 42 transmitted rotation another rotation of the third gears 42 are superimposed, wherein at an approach of one of the suction arrangements 32 to the magazine the first gear 38 first rotated by a predetermined angle clockwise and then rotated back by the same angle counterclockwise. By this superimposed rotary motion, an approximation of the suckers 34 spanned rectangles in approximately parallel alignment with the surface of vorstest in the magazine 14 arranged folding box 12 so that the suckers 34 the relevant suction arrangement 32 almost at the same time on the carton 12 come to the plant. To put down the carton 12 on the conveyor belt 16 become the suckers 34 briefly subjected to overpressure.

The negative pressure generated by a vacuum source, not shown, is applied to each of the suction assemblies 32 via a separate line 52 transmitted. Each of the lines 52 has a parallel to the first axis of rotation 22 through the drive shaft 21 extending section 54 on, each of the sections 54 at a distance to the first axis of rotation 22 runs. Each of the sections 54 is with the vacuum source by means of a separate rotary feedthrough 56 connected so that each suction assembly 32 independent of the other suction arrangements 32 specifically with negative pressure and, if the vacuum source is also designed to generate an overpressure, with overpressure for faster repulsion of the suckers 34 adhesive cartons 12 can be applied. Each of the lines 52 forks in the respective suction arrangement 32 in four end sections 58 , each of which is attached to one of the funnel-shaped, open-ended suckers 34 ends.

In the embodiment shown, the transfer device 20 three extension arms 24 on. However, this is not mandatory. It is also possible that the transfer device 20 another number of equiangularly spaced boom arms 24 having. This is the first gear 38 always then by means of the further motor drive 48 abandoned the above-described reciprocation when one of the cantilever arms 24 the magazine 14 approaches. In the illustrated embodiment with three boom arms 24 this is per revolution of the boom arms 24 around the first axis of rotation 22 three times, namely when approaching the magazine 14 , once when approaching the stop 18 and once, in this case without any function, in the middle between.

In summary, it should be noted that the invention relates to a device 10 for handling folding cartons 12 with a magazine 14 for receiving folded cartons 12 , with a transport device 16 for the removal of erected cartons 12 which is a stop 18 for the cartons 12 has, and with a transfer device 20 for removing folding cartons 12 from the magazine 14 and for pressing against the stop 18 for the purpose of erecting and placing on the transport means 16 , wherein the transfer device 20 a number n about a fixed first axis of rotation 22 motor driven rotatable, rigidly connected arms 24 where n is a natural number and greater than one, where at the free end 26 each cantilever arm 24 a suction arrangement 32 carrying suction boom 30 around a jib-resistant, to the first axis of rotation 22 parallel second axis of rotation 28 is rotatably disposed, each suction assembly 32 at least three of a vacuum source acted upon by a vacuum sucker 34 for sucking the cartons 12 and wherein each cantilever arm 24 with the associated suction boom 30 coupled so that the rotation of the suction boom 30 opposite to the direction of rotation of the boom 24 and at n times the angular velocity of the cantilever arm 24 he follows. According to the invention it is provided that the suckers 34 forming the corners of a polygon and that by coupling with the at least one cantilever 24 predetermined rotation of the associated Saugauslegers 30 by another motor drive 48 another rotation is superimposed.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0159415 B1 [0003]

Claims (13)

Device for handling folding cartons ( 12 ) with a magazine ( 14 ) for receiving folded cartons ( 12 ), with a transport device ( 16 ) for the removal of erected cartons ( 12 ), which is a stop ( 18 ) for the cartons ( 12 ), and with a transfer device ( 20 ) for removing folding boxes ( 12 ) from the magazine ( 14 ) and for pressing against the stop ( 18 ) for the purpose of erecting and placing on the transport equipment ( 16 ), the transfer device ( 20 ) a number n about a fixed first axis of rotation ( 22 ) motor-driven rotatable, rigidly interconnected cantilever arms ( 24 ), where n is a natural number and greater than one, wherein at the free end ( 26 ) of each cantilever arm ( 24 ) a suction arrangement ( 32 ) carrying suction boom ( 30 ) about a boom arm-fixed, to the first axis of rotation ( 22 ) parallel second axis of rotation ( 28 ) is rotatably arranged, each suction arrangement ( 32 ) at least three of a vacuum source acted upon by a vacuum sucker ( 34 ) for sucking the folding boxes ( 12 ), and wherein each cantilever arm ( 24 ) with the associated suction boom ( 30 ) is coupled so that the rotation of the suction boom ( 30 ) opposite to the direction of rotation of the cantilever arm ( 24 ) and at n times the angular velocity of the cantilever arm ( 24 ), characterized in that the suckers ( 34 ) form the corners of a polygon and that by coupling with the at least one cantilever arm ( 24 ) predetermined rotation of the associated Saugauslegers ( 30 ) by another motor drive ( 48 ) another rotation is superimposed. Apparatus according to claim 1, characterized in that the transfer device ( 20 ) a fixed first power transmission wheel ( 38 ), which around the first axis of rotation ( 22 ) and rotatable by means of the further motor drive ( 48 ) is drivable that each suction boom ( 30 ) fixed with a to the associated second axis of rotation ( 28 ) rotatable, the second axis of rotation ( 28 ) as a central axis having cantilever shaft ( 27 ) and that the first power transmission wheel ( 38 ) by power transmission means ( 40 . 41 . 42 . 44 ) with each of the jib shafts ( 27 ) is coupled. Device according to claim 2, characterized in that the first power transmission wheel ( 38 ) via a first belt ( 40 ) with one fixed to one of the jib shafts ( 27 ) connected second power transmission ( 41 ), wherein one revolution of the first power transmission wheel ( 38 ) n revolutions of the second power transmission wheel ( 41 ) causes. Device according to claim 3, characterized in that with each of the jib shafts ( 27 ) a third power transmission wheel ( 42 ) and that the identically formed third power transmission wheels ( 42 ) by means of a second belt ( 44 ) are interconnected. Device according to one of the preceding claims, characterized in that each suction boom ( 30 ) a fourth power transmission wheel ( 46 ) carried on the suction boom ( 30 ) about a third axis of rotation ( 36 ) is rotatably mounted and so with the associated boom shaft ( 27 ) is rotated in opposite directions, and that the fourth power transmission wheel ( 46 ) firmly with the associated suction arrangement ( 32 ) connected is. Apparatus according to claim 5, characterized in that each of the suction arrangements ( 32 ) eccentrically spaced from the third axis of rotation ( 36 ) fixed to the respective fourth power transmission wheel ( 46 ) connected is. Apparatus according to claim 6, characterized in that each of the suction arrangements ( 32 ) at an attachment point with a fixed to the associated third axis of rotation ( 36 ) rotatable, the third axis of rotation ( 36 ) as a central axis having Sauganordnungswelle ( 37 ) and that the third axis of rotation ( 36 ) between the attachment point and the suction device ( 34 ) spanned plane is arranged. Apparatus according to claim 7, characterized in that each of the Sauganordnungswellen the associated fourth Kraftübertragungsrad ( 46 ) and is fixedly connected to it and that each of the fourth power transmission wheels ( 46 ) by means of a third belt ( 45 ) with a boom arm fixed fifth power transmission ( 47 ) on the associated cantilever arm ( 24 ) is coupled. Device according to one of the preceding claims, characterized in that the vacuum source with each suction arrangement ( 32 ) via a line ( 52 ) connected by a fixed to the cantilever arms ( 24 ) to the first axis of rotation ( 22 ) rotatable and the first axis of rotation ( 22 ) as a central axis having central drive shaft ( 21 ) extending in the longitudinal direction section ( 54 ), which by means of a rotary feedthrough ( 56 ) is connected to the vacuum source. Device for handling folding cartons ( 12 ) with a magazine ( 14 ) for receiving folded cartons ( 12 ), with a transport device ( 16 ) for the removal of erected cartons ( 12 ), which has at least one stop ( 18 ) for the cartons ( 12 ), and with a transfer device ( 20 ) to the Removing folding boxes ( 12 ) from the magazine ( 14 ) and for pressing against the at least one stop ( 18 ) for the purpose of erecting and placing on the transport equipment ( 16 ), the transfer device ( 20 ) a number n about a fixed first axis of rotation ( 22 ) motor-driven rotatable, rigidly interconnected cantilever arms ( 24 ), where n is a natural number and greater than one, wherein at the free end ( 26 ) of each cantilever arm ( 24 ) a suction arrangement ( 32 ) with a number of suction devices (which can be acted upon by a negative pressure source with a negative pressure) (US Pat. 34 ) for sucking the folding boxes ( 12 ), characterized in that the vacuum source is connected to each suction arrangement ( 32 ) via a line ( 52 ) connected by a fixed to the cantilever arms ( 24 ) to the first axis of rotation ( 22 ) rotatable and the first axis of rotation ( 22 ) as a central axis having central drive shaft ( 21 ) extending in the longitudinal direction section ( 54 ), which by means of a rotary feedthrough ( 56 ) is connected to the vacuum source. Apparatus according to claim 9 or 10, characterized in that several, different suction arrangements ( 32 ) leading lines ( 52 ) each one in the drive shaft ( 21 ) extending section ( 54 ), the sections ( 54 ) in each case at a distance and parallel to the first axis of rotation ( 22 ) and in each case via a separate rotary feedthrough ( 56 ) are connected to the vacuum source. Method for operating a device ( 10 ) according to one of claims 1 to 9, wherein by means of the further motor drive ( 48 ) the suction arms ( 30 ) when approaching the magazine ( 14 ) one of them by coupling with the at least one cantilever arm ( 24 ) predetermined rotation counter to further rotation is given by a predetermined angle, which is followed by a rotation by the same angle in the opposite direction. Method for operating a device ( 10 ) according to one of claims 1 to 11, characterized in that the suckers ( 34 ) over the respective line ( 60 ) after pressing a folding box held by them ( 12 ) to the respective stop ( 18 ) are pressurized over predetermined periods of time with positive pressure and are subjected to constant pressure outside the predetermined time periods.

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