EP1174256A2 - Device for erecting and glueing boxes - Google Patents

Abstract

The sticking and folding machine comprises a sucking device for individual removal of folding sections from a magazine, and transferring them to a conveyor for folding and sticking. The sucking device has a vertically fixed axis and a radially moving linear sucking head. At the edge of the chain wheel is a rolling chain which transfers a roller.

Description

The invention relates to a device for erecting and gluing of folding box blanks with a suction device for individual removal of folding box blanks from a magazine and transfer into one Conveyor track for folding and gluing the areas Folding box blanks with a transport device, folding devices and an adhesive applicator.

In a known device for setting up a folding box blank According to EP 0 339 116 B1, the folding box blanks are made using a Suction cups taken from a magazine, with several suction cups circulate evenly spaced from each other on a circular path and are driven by a planetary gear and a corresponding hypotrochoidal path on the way from a removal position from the Describe the magazine for a transfer position on a conveyor track. The The folding box blanks are transferred by a downward incline Facilitated the path from the removal position of the magazine to the conveyor track.

The invention has for its object a device for erecting and gluing folding box blanks to create that is powerful and also larger tolerances of the folding box blanks without disturbing the Manufacturing process allows.

According to the invention, folding box blanks, in particular in shape pre-glued and flat folded box sleeves are present, erected and the bottom flaps are folded over and glued so that the so erected folding boxes are subsequently filled with packaging material can.

According to the proposal of the invention, this object is at a Generic device solved in that the suction device at least one rotatable about a vertical fixed axis and in with respect to the vertical fixed axis linearly radially movable suction cup having.

The additional linear proposed according to the invention Possibility of movement of the suction cup makes it possible to change the distance of the To enlarge the suction cup from the axis in some areas, according to the invention in Area of the removal position of the folding box blank from the magazine, to subsequently suffice in orbit to the transfer position Space and time to erect the folding box blank in this way to enable and a transfer of the erected folding box blank into the conveyor track for the subsequent production of the bonded floor enable.

Advantageous refinements and developments of the invention Device are the characteristic features of the subclaims removable.

According to a proposal of the invention, a is used as a drive for the suction cup Sprocket provided, that with a circumferential roller chain is equipped and assigned the roller chain of the chain wheel in the area of Removal position of the magazine over a nose-shaped over the circumference of the Sprocket protruding deflection is performed, between Roller chain and suction cup an active connection by means of rotatable bolts is formed so that the suction cups from the rotating roller chain according to their path.

The linear movement of the suction cup is according to another proposal the invention, for example, realized in that the suction cup on an angle bracket, which is equipped with an elongated hole Has holding arm and the holding arm with the slot on the vertical fixed axis is guided. If the roller chain in the area of Deflection radially away from the fixed axis, the Suction cup, which is carried with the roller chain via the rotating pin, are radially deflected via the sliding guide of the elongated hole. Also one other storage and linear guidance of the suction cups is possible, for example, by forming the radially along the vertical axis guided holding arms with two over webs and a sliding guide with each other connected round bars.

To already on the way from the removal position from the magazine to the Transfer position in the conveyor path of the device an erection of the To enable folding of the carton, it is suggested that one in Direction of rotation of the roller chain and the suction cup lagging the suction cup Provide a folding plate that can be pivoted on the angle bracket of the suction cup. The folding plate is fixed according to the invention on the vertical axis arranged control disc with which the folding plate is in a Active connection is such that when the suction cup rotates with Folding sheet around the vertical axis between the removal position from the Magazine and the transfer position in the conveyor track the folding sheet in an over the circumference of the chain wheel with roller chain protrudes approximately radially Unfolded position with contacting of the transported with the suction cup Folding box blank is movable while erecting the same and between the transfer position and the removal position on further Circulation of the suction cup the folding sheet in an almost tangential Rest position in relation to the sprocket with roller chain is movable.

The handover and exact assignment in the conveyor track and taking the erected folding box blank - sleeve - is made according to a Another proposal of the invention by means of a transport device, the pairs has spaced apart carrier strips, which are arranged vertically are carried in a horizontally rotating chain drive, the in each case leading carrier bar of a pair in one direction upper and lower revolving chain and each in the conveying direction trailing driver strip of a pair in another upper and lower rotating chain of the chain drive are guided. Suction device and transport device with driver strips are assigned to each other so that a horizontal promotion and accurate handover and insertion of the erected sleeve into the conveyor at high Clock numbers is enabled. To make the device as simple and quick as possible to convert to different dimensions of folding box blanks can, it is suggested, the two each of an upper and lower Chain formed chain pairs of the chain drive of the transport device Driver strips by means of an assigned worm gear to adjust against each other, so that the distance between the driver strips one Couple is changeable and thus the dimensions of the treated Folding box blanks is customizable.

The coordination of the conveying speed by means of a transport device and the removal speed of the folding box blanks by means of the Suction device is achieved in that the drive for the sprocket of the suction device from the drive of the Transport device, i.e. the chain drive of the transport device is derived. It is also possible to make the connection between the two Chain drives of suction device and transport device mechanically or by e.g. two servo-motor drives.

To increase the number of cycles, it is also necessary that a flawless and fast gluing of the folded over, the bottom of the folding box forming tabs is made possible. This is according to the invention promoted that each driver strip of a pair with one on the Carrier ledge and vertically slidably mounted Hold-down device is equipped. The hold-down is in the manner of the respective Driver bar arranged and guided that between hold-down and Driving bar a sufficient distance or gap remains in one Wall of the folding box blank is insertable and the carrier strips guide the erected folding box blank on the outside and the Hold-down is inside the erected folding box and up can be lowered onto the folded floor.

According to a proposal of the invention, the hold-down device on its upper Head area in one with the chain drive of the transport device, in which the carrier strips are guided, aligned by one Slideway guided certain orbit. The sliding guide points lengthways a section of the conveyor track from the horizontal to the upper chains of the chain drive adjacent orbit vertically downward Bend on, with the hold-down device from an upper position to a contacting the folded bottom of the folded box blank Position can be lowered and then raised again. The Bending of the sliding guide can take the form of a spread U with a downward curve, a straight horizontal line and have an upward curve.

To increase the contact pressure and promote the sticking of the Bottom-forming tabs of the folding box blank is provided on the the lowered position of the hold-down opposite the bottom of the Conveyor path to provide a counter bearing formed from rollers, so that the folded and glued bottom of the folding box blank between hold-down device and counter bearing by applying contact pressure is feasible.

Further advantageous configurations of the device according to the invention as well as their mode of operation are described below with reference to the drawing shown and explained.

Figur 1

eine schematisierte Draufsicht auf die Vorrichtung zum Aufrichten und Verkleben eines Faltschachtelzuschnittes in Gestalt eines Faltschachtelzuschnittes,

Figur 2

die Ansicht B gemäß Figur 1 auf die Transportvorrichtung mit Förderbahn des aufgerichteten Faltschachtelzuschnittes,

Figur 3

die Absaugvorrichtung in schematisierter Darstellung gemäß Figur 1,

Figur 4

eine schematische Darstellung der Arbeitsschritte der Vorrichtung gemäß Figur 1 in bezug auf den Faltschachtelzuschnitt.

Show it:

Figure 1

2 shows a schematic plan view of the device for erecting and gluing a folding box blank in the form of a folding box blank,

Figure 2

1 shows the view B according to FIG. 1 of the transport device with the conveyor path of the erected folding box blank,

Figure 3

the suction device in a schematic representation according to Figure 1,

Figure 4

a schematic representation of the steps of the device according to Figure 1 in relation to the folding box blank.

Figure 1 shows schematically the structure of a device for erecting and Gluing folding box blanks with a magazine 10 for the Folding box blanks 1, here in the form of pre-glued, folded Box sleeves. The folding box blanks 1 are by means of a Suction device 2 brought to a transport device 6, whereby it the way to the transport device 6 unfolded, i.e. be erected and in the erected state at the transfer position U into the conveyor track 50 are introduced. The entrainment in the transport device 6 takes place by means of pairs arranged and with a chain drive in the direction of arrow P circumferential driver strips 70a, 70b, between which the erect Folding box blanks transported in the direction of arrow T and again out of the Transport device 6 can be released in areas E.

FIG. 4 schematically shows the manufacturing process in the device is carried out according to Figure 1, with the various steps shown.

In the first step I, the folding box blank 1, here in the top view and shown the front view, from the magazine M by means of a suction cup removed, and in a subsequent step II on the way to Conveyor track erected and then in an erected state on the Transfer position in step III from the suction device with the Suction cup in the conveyor track and on the driver strips of the Hand over the transport device. In the conveyor track and on the Transport routes take place one after the other in work step IV Bottom flaps a and b transverse to the conveying direction T, further below retracting the hold-down device in the erected folding box blank in Step V and the adhesive application to the bottom tabs, so that in following work VI the two longitudinal tabs c and d of the bottom are folded in and so erected into an open box with a glued bottom folding box blank one Filling station with packaged goods can be fed. Before leaving of the transport device are the hold-down in work VII pulled out of the erected folding box.

The suction device 2 shown in Figure 1 for removing the Folding box blank 1 from the magazine M at the removal position M has a fixed vertical axis 21 around which the suction cups 30, here three suction cups equally spaced about the axis 21 in Arrow direction D are rotatably mounted. The suction cups 30 sit on one Angle bracket 31, with a vertical arm 31a, on which the suction cup is arranged and a horizontal support arm 31b, which has an elongated hole 32 is formed. The angle bracket is for linear guidance e.g. with the Elongated hole 32 of the arm 31b guided on the axis 21 and can thus rotate about axis 21 and further a linear movement in Direction of the arrow RL radially with respect to the axis 21 in the longitudinal axis of the Make an elongated hole. The suction cups are D driven by a sprocket 20 around which the roller chain 23 rotates. The operative connection between the suction cups or the angle holder 31 and the roller chain 23 is by means of rotatable bolts, not shown, which sit on the roller chain 23 and into which the angle brackets engage, manufactured. In the area of the driving position M of the magazine 10, the Roller chain 23 has a nose-shaped deflection 22. As from FIG. 3 can be seen, this deflection 22 of the roller chain 23, for example, by corresponding deflection rollers 22a, 22c and 22b reached and defined. The Sprocket is e.g. from the main drive for the revolving chains of the Transport device 6 driven so that here synchronicity for the Movements of the suction cups and carrier strips can be produced.

To erect the flat folded folding box blank enable, is the suction device, i.e. each suction cup with angle bracket additionally with a swivel on the suction cup or on the angle bracket 31 pivotally mounted folding plate 40 equipped. The folding plate 40 is in Direction of rotation D of the suction cups can be swiveled on the angle bracket attached. The folding plate 40 can horizontally about its pivot axis 43 in Arrow direction F from a tangential position with respect to the outer circumference of the Sprocket 20 in an approximately radial position over the circumference of the Sprocket be pivoted outward above. The Swivel movement is by means of a fixed to the fixed vertical Axis 21 of the suction device mounted control disc 4 controlled. The folding plate 40 is connected to a control rod 41 for this purpose its other end along the control disc 4 during the circulation of the Angle bracket 31 slides with the suction cups and accordingly the folding plate 40 moved from the rest position to the unfolding position or erection position F. The folding plate 40 has the task that with the suction cup 30 on the Removal station M removed from the magazine 10 folding box blank 1, which is still in the folded blank, on the short one Path in the direction of arrow D to the conveyor track 50 of the transport device 6 erect to a rectangular open sleeve 1a. After removing the Folding box blank 1 by means of the suction cup 30 from the magazine, the suction cup projecting radially from the deflection 22 Orbit of the chain wheel is brought out by means of the roller chain 23, the suction cup with folding box cut will be re-used during further circulation Leave the removal position in the direction of the transfer position U again in the Circumferential area of the chain wheel through radial return of the angle bracket spent and here the folding plate 40 along the control rod 41 guided in this area projecting control disc 4, such that the control rod 41 is guided radially outwards and the folding plate 40 around it Pivot axis 43 is pivoted outwards, and in contact with it the folded folding box blank comes and this, as in position F shown, in the direction of rotation D erects to the open sleeve 1a. With further Transport in the direction of transfer position U becomes the open one Folding box blank 1a in the between a pair of driver strips 70a, 70b formed space of the transport device adjusted exactly like that Arrow G indicates, and in an open, upright rectangular shape from the Carrier strips 70a, 70b transported into the conveyor track 50.

The structure and function of the transport device 6 for further folding and gluing the bottom of the erected folding box sleeve 1a is on an embodiment of Figure 1 shown in connection with Figure 2. The driver strips are guided in a chain drive, each Driving bar at their upper end and at their lower end in one each circulating chain is such that the in the direction of rotation and Direction of transport T leading carrier bars 70a of a pair of Carrier strips in the chain 60 arranged at the top and the lower chain Chain 62 are guided and each trailing carrier bar 70b of a pair of carrier strips in an upper, below the uppermost chain 60 arranged chain 61 and a lower, below the first lower chain 62 arranged chain 63 is guided. The upper pair of chains 60, 61 and that lower pair of chains 62, 63 are arranged one above the other and run via upper deflection rollers 64a, 65a and lower deflection rollers 64b and 65b, the connected via axes 66, 67 are endless in the direction of arrow P, with one Axis 66 as the main shaft by means of a motor, not shown is driven. The attachment of the driver strips 70a, 70b of a pair of carrier bars on chains rotating separately from each other the arrangement of a worm gear, with the help of which the two chains 60, 62 for the leading carrier bars and the chains 61, 63 for the lagging driver strips are adjustable in their distance from each other, during a short changeover time to the device for Convert folding box blanks of other dimensions.

For folding the conveyor belt 50 in the transport direction T with your Folding axes transverse to the direction of conveyance are in the area of positions III and IV below the conveyor track 50 not shown Stop bars or bellcranks arranged to fold the Bottom flaps a and b, as shown in the figure, while performing of the folding box cut through the conveyor track using the Carrier strips to perform. In order for the subsequent bonding sufficient contact pressure and a quick and secure sticking of the The transport device with hold-down devices is to enable floor straps 80a, 80b equipped, each assigned to a carrier bar and on these are led. Each driver bar is a hold-down in the way assigned that the hold-down 80a, 80b between a pair Driver strips 70a, 70b arranged and vertically in the direction V along the respective driver strips 70a and 70b are displaceable in guides. The Driver strips 70a, 70b are in via holding webs 71a, 73a and 71b, 73b the upper and lower chains spaced from these. The Hold-down devices 80a, 80b are equipped with a head 82a and 82b, respectively which they are in a directly below the upper pair of chains 60, 61 Transport device circumferentially formed sliding guide 90 are guided. This sliding guide 90 for the hold-down device now points along a section S within the conveyor track, which differs approximately from the area in which the Folding box cut is fully set until shortly before Output area E determined from the conveyor track, with a vertically downward extending depression or bend 90a that approximates the shape has a spread U. When the carrier strips circulate in The direction of arrow P or in the direction of transport T become with each Carrier ledge held down in the sliding guide 90 and now spent in the valley in the sliding guide down, like can be seen in FIG. The hold-downs 80a and 80b move into the erected folding box sleeve 1a, see Figure 4 until it with your lower stamp-like end 81a, 81b on the folded bottom flaps a and b put on and when moving in the transport direction, which on the Bottom flaps a, b provided with adhesive after folding of the longitudinal links c and d, see Figure 4 when guiding e.g. about a Press on the roller counter bearing and ensure good adhesion and adhesion. When you continue in the direction of transport, the hold-down devices are then again led back up along the bend, give the Folding box sleeves free, and so erected and with glued bottom provided open folding boxes leave the transport device and can be fed to a packaging facility.

Claims (12)

Device for erecting and gluing folding box blanks with a suction device for the individual removal of folding box blanks from a magazine and transferring them to a conveyor track for folding and gluing the folding box blanks in areas with a transport device, folding devices and a glue application device, characterized in that the suction device has at least one vertical one Axis rotatable and linearly radially movable suction cup with respect to the vertical axis. Apparatus according to claim 1, characterized in that a sprocket is provided as the drive for the suction cup and a roller chain is guided on the circumference of the sprocket and the roller chain of the sprocket assigned to the removal position of the magazine is guided via a nose-shaped deflection projecting over the circumference of the sprocket, wherein an operative connection is formed between the roller chain and the suction cup by means of rotatable bolts. Apparatus according to claim 1 or 2, characterized in that the suction cup is located on an angle holder which has a holding arm equipped with an elongated hole and the holding arm is guided with the elongated hole on the vertical fixed axis. Device according to one of claims 1 to 3, characterized in that a folding plate which is pivotably mounted on the angle holder and follows the suction cup in the direction of rotation of the roller chain and the suction cup is provided. Device according to one of claims 1 to 4, characterized in that the folding plate is in operative connection with a control disk arranged in a fixed manner on the vertical axis and, when rotating around the vertical axis, between the removal position from the magazine and the transfer position into the conveyor track, one over the The circumference of the sprocket with roller chain is approximately radially protruding unfolding position with contacting of the folding tile blank transported with the suction cup and erection of the same, and is movable between the transfer position and the removal position from the magazine into an approximately tangential rest position with respect to the sprocket with roller chain. Device according to one of claims 1 to 5, characterized in that the conveying device of the conveyor track has pairs of spaced-apart carrier strips which are mounted vertically arranged in a horizontally rotating chain drive, the carrier strip of a pair of carrier strips leading in each case in an upper and lower circumferential chain and the carrier bar of a pair lagging in the conveying direction are each held in a further upper and lower circumferential chain. Device according to one of claims 1 to 6, characterized in that the two pairs of chains each formed from an upper and a lower chain are mutually adjustable by means of an associated worm gear, so that the distance between the carrier bars of a pair can be changed and the dimensions of the folding box blank to be treated can be adapted is. Device according to one of claims 1 to 7, characterized in that the drive for the chain wheel is derived from the drive of the transport device. Device according to one of claims 1 to 8, characterized in that each driver bar of a pair is equipped with a hold-down device guided on the driver bar and supported in a vertically slidable manner. Apparatus according to one of Claims 1 to 9, characterized in that the hold-down devices are guided at their upper head region in an orbit which is aligned with the chain drive of the transport device and is determined by a slide guide, and the slide guide along a section of the conveyor path is one of the horizontal and the upper chains of the Chain drive adjacent orbit vertically downward bend on which the hold-down can be lowered from an upper position into a lower position contacting the folded bottom of the folding box blank and then raised again. Device according to one of claims 1 to 10, characterized in that the deflection of the sliding guide has the shape of a spread U with a downward curve, a straight horizontal line and an upward curve. Device according to one of claims 1 to 11, characterized in that a counter bearing formed from rollers is provided on the underside of the conveyor track opposite the lowered position of the hold-down devices, so that the folded and glued bottom of the folding box blank between the hold-down device and counter bearing while exercising Contact pressure is feasible.

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