EP2093175B1 - Device for discharging printed materials, and folding box glueing machine with such a device - Google Patents

Description

The invention relates to a device for discharging printing substrates according to the preamble of claim 1 and a folding box gluing machine according to the preamble of claim 9.

• Einen Einleger, der die zu verarbeitenden Zuschnitte mit hoher Geschwindigkeit aus einem Stapel nacheinander abzieht und einzeln der nachfolgenden Bearbeitungsstation zuführt,
• eine Faltstation, in der die mit einem Klebestreifen versehenen Zuschnittteile zur Herstellung einer Klebeverbindung um 180° umgelegt, also gefaltet werden,
• eine Überleitstation, die die gefalteten, mit noch nicht abgebundenen Klebenähten versehenen Zuschnitte in allen Teilen exakt ausgerichtet der nachfolgenden Sammel- und Presseinrichtung zuführt werden, und
• eine Sammel- und Presseinrichtung, in der zunächst ein Schuppenstrom aus gefalteten Zuschnitten gebildet wird, der anschließend zwischen Pressbändem für einige Zeit unter Druck gehalten wird, damit die Klebenähte abbinden.

Folding box gluing machines for producing folding boxes from blanks have, as is known, at least the following processing stations:

• An inserter which pulls the blanks from a stack one after the other at high speed and feeds them one by one to the following processing station,
• a folding station in which the blank parts provided with an adhesive strip are folded by 180 °, ie folded, to produce an adhesive bond,
• a transfer station, the folded, provided with not yet set adhesive seams blanks in all parts exactly aligned the subsequent collection and pressing device are fed, and
• a collecting and pressing device, in the first a shingled stream of folded blanks is formed, which is then held between Pressbändem for some time under pressure, so that the adhesive seams set.

Depending on the type of box to be produced, the machine may contain other processing stations; for example, one or more primary crushers in which folding flaps are folded back and forth to soften and smooth the corresponding longitudinal score lines by 180 ° creasing, and further folding stations to perform additional pleats. At the beginning of a folding station usually an applicator is arranged for adhesive, which applies an adhesive strip on the folding flaps to be bonded.

The blanks are conveyed through the individual stations by driven conveyors. As driven conveyor two or three conveyor belt pairs are used, which are arranged with transverse spacing so that they lead the blanks from above and below holding.

In order to remove faulty folding carton blanks or folding cartons from the conveying stream, ejecting devices are known from the prior art in addition to plate and linear ejectors:

US 5,467,976 A discloses a device according to. the preamble of claim 1.

The patent DE 698 16 717 T2 underlying invention describes a sorting device in a conveyor. Machines for processing successive sheets of paper or board are followed by conveyors, which are formed by upper and lower conveyor belts, which transport the products safely. In order to be able to sort out products that do not meet the quality requirements, sorting devices are used. These devices, also called ejector, must be able to sort out products in a short time, without causing a material jam.

The DE OS 1 223 682 shows a device for sorting out guided between upper and lower conveyor belts bow. The sorting is done by a deflection member (which is designed as a pivotally mounted cross member) deflects the upper band against the conveying plane down. In the transport direction behind the deflection member is a guide member, which is designed as a fixed guide wedge. The guide wedge has a horizontal and an inclined surface, wherein the horizontal surface in the transport plane of arc is that are not discharged and the inclined surface forms the guide channel for auszuschleusende products. Products that are discharged are transported by a lower conveyor. The exclusive transport through the lower conveyor happens only on a limited distance. Over the majority of the transport section of auszuschleusende sheet is clamped by an upper and lower conveyor and safely transported away.

The GB 2 264 699 A shows a device for cutting sections of fabric sheets and for discharging them. A fabric, driven by rollers, is transported between guide plates. If a tissue section is detected that does not meet the quality requirements, the critical section in the area of the device is cut out. For this purpose, a first knife moves into the transport plane and forms the front edge of the section through the cut. The knife also serves as a switch, which discharges the section along a guide plate. As far as the rear end of the section passes a second knife, this separates the section of the subsequent tissue and the horizontal transport direction is released immediately. To prevent material jams and to remove the ejected sections quickly and safely, the section is gripped by two opposing rollers. One of the rollers is driven, wherein the speed of the roller is greater than the transport speed in the horizontal transport direction.

The DE PS 1 113 358 shows a device for eliminating defective sheet in sheet-forming and processing machines in which the sheets are moved between endless conveyor belts and faulty sheets are eliminated by deflecting parts of the conveyor belts: by means of guide rollers, both parts of the upper and the lower conveyor belts from their normal horizontal Pivoted position. The guide rollers are pivoted about a common fixed axis. How the discharged sheets are transported further, will not continue.

The problem with the reject devices known from the prior art is their high reaction time and the inaccurate reproducibility of the movement of discharge elements which initiate the discharge of a folding box blank or a folding box. The reproducibility is further reduced if the respective discharge elements are driven by a respective pneumatic cylinder.

Object of the present invention is therefore to provide a device for discharging substrates, which allows a reliable discharge of substrates.

This object is achieved in an advantageous manner by a device for discharging with the characterizing features of claim 1 and by a Faltschachtelklebemaschine with the characterizing features of claim 9.

In the apparatus according to the invention for discharging printing substrates, the printing materials, such as sheets or folding carton blanks made of paper, cardboard and the like, are guided through at least two conveyor belt pairs arranged in parallel, each having an upper and lower conveyor belt. The device for discharging further has deflection elements, wherein each conveyor belt pair is associated with a deflecting element. A respective deflection element serves to deflect the respective upper and lower conveyor belt downwards relative to the horizontal conveying plane. As a result, the substrates to be rejected are deflected by the deflected belts from their horizontal transport direction into a discharge direction and removed from the delivery stream. Advantageously, the deflection elements are indirectly or directly connected to a shaft and the shaft is driven by an actuator. The actuator may be a pneumatic cylinder, a hydraulic cylinder, a controllable electric motor or in particular a servomotor. The deflection elements can either be arranged directly on the shaft or they are connected via intermediate elements with the shaft.

According to the invention, eccentric discs are rotationally mounted on the shaft, wherein each eccentric disc is associated with a respective deflecting element and acts on this. The rotation of the shaft with the eccentric discs and the transmission of the movement of the eccentric discs on the deflection causes the deflection cause the deflection of the conveyor belts and thus the discharge of a substrate.

In an advantageous embodiment of the device for discharging - viewed in the direction of discharge - after the deflection a baffle arranged, which is mounted at a shallow angle to the horizontal conveying plane. The substrates to be rejected become in the direction of rejection along the baffle. Advantageously, the baffle opposite a driven ejector roller is arranged so that a auszuschleusender printing material between the guide plate and ejector roller is conveyed clamped. The peripheral speed of the ejector roller is greater than or equal to the speed of the horizontal conveyor belts in order to be able to quickly remove a substrate to be rejected from the vertical flow of substrates.

In a first advantageous development of the device described, a plurality of roller bearings arranged parallel to one another are inserted into the guide plate relative to the driven ejector roller, a so-called roller bearing package. The rolling bearings may in particular be radial ball bearings. The rolling bearings are pushed with their inner rings on an axis which is parallel to the axis of the ejector roller. The outer rings of the bearings are raised against the baffle. As a result Auszuschleusende substrates between ejector roller and outer rings of the bearings are encouraged clamped.

In a second advantageous development of the device, a plurality of rotatable balls is embedded in the guide plate relative to the driven ejector roller. The balls are each held by a cage and are positioned so that a dome of the ball is raised against the baffle. To be rejected substrates are thus clamped between ejector roller and balls clamped.

In a third advantageous embodiment of the device, a second roller is arranged opposite the driven ejector roller, whose axis is arranged parallel to the axis of the ejector roller. The lateral surface of the second roller is raised relative to the baffle. Shims to be ejected are conveyed clamped between the two rollers.

Regardless of the configuration of the counter element of the ejector roller, the ejector roller can be made rubberized, whereby the coefficient of friction between the roller and auszuschleusendem substrate can be optimized. In an alternative advantageous Embodiment, the ejector roller is provided with teeth or needles, thereby ensuring that the auszuschleusende substrate is reliably removed from the horizontal flow.

The invention also relates to a folding box gluing machine with a device for discharging as described above. In an advantageous embodiment of the Faltschachtelklebemaschine the device for discharging is constructed as an independent machine module of Faltschachtelklebemaschine and is arranged upstream of a transfer station of Faltschachtelklebemaschine. Further, the transfer station and the device for discharging are designed such that they can be operated at different speeds. If z. B. the transfer station operated at a higher speed than the device for discharging, so remains for the process of discharging more time because the box spacing can be increased.

A Faltschachtelklebemaschine with a transfer station and a device for discharging substrates is disclosed, wherein the substrates such as sheets or Faltschachtelzuschnitte of paper, cardboard and the like are passed through at least two parallel arranged conveyor belt pairs, each having an upper and a lower conveyor belt. The device for discharging further has deflection elements, wherein one deflection element per pair of conveyor belts is present. A respective deflection element causes the deflection of the upper and lower conveyor belt relative to the horizontal conveying plane down. The materials to be rejected are discharged by the deflected conveyor belts from their horizontal transport direction in a discharge direction. The device for discharging is advantageously arranged upstream of the transfer station and the transfer station and the device for discharging can be operated at different speeds.

With regard to further advantages and advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

exemplary

Fig. 1a

einen Ausschnitt aus einer Faltschachtelklebemaschine während nicht ausgeschleust wird

Fig. 1b

einen Ausschnitt aus einer Faltschachtelklebemaschine während ausgeschleust wird.

Fig. 2a

eine Detailansicht der Vorrichtung zum Ausschleusen während nicht ausgeschleust wird

Fig. 2b

eine Detailansicht der Vorrichtung zum Ausschleusen während ausgeschleust wird

Fig. 3

eine räumliche Darstellung der Vorrichtung zum Ausschleusen

Fig. 4

eine alternative Ausführungsform der Vorrichtung zum Ausschleusen

The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation

Fig. 1a

a section of a Faltschachtelklebemaschine while not ejected

Fig. 1b

a section of a Faltschachtelklebemaschine while ejected.

Fig. 2a

a detail view of the device for discharging while not discharged

Fig. 2b

a detail view of the device for discharging while discharged

Fig. 3

a spatial representation of the device for discharging

Fig. 4

an alternative embodiment of the device for discharging

Fig. 1a shows the device for discharging 200 with the adjacent machine modules folding station 100 and transfer station 300 as a section of a folding box gluing machines 1000. The device for discharging 200 is in the position "folding box not eject". This can be seen in that the ejector lever 7 and the spring-loaded lever 13 are in their uppermost position. The evaluated as faulty cartons 3800 are further promoted in the horizontal direction of transport T and transferred to the transfer station 300.

Also the Fig. 1b shows the device for discharging 200 with the adjacent machine modules folding station 100 and transfer station 300. The device for discharging 200 is in its position "eject reject bin". This is seen by the fact that the ejector lever 7 and the spring-loaded lever 13 are in their lower position. The auszuschleusende carton 38 is guided from the horizontal transport direction T at a shallow angle in the discharge direction A to a discharge plate 28 and from the discharge plate 28 opposite arranged driven ejector roller 27 taken, transported down and discharged so.

Fig. 2a shows the device for discharging 200 in the state "folding box not eject" in a detailed view. The ejector lever 7 is in its uppermost position, at top dead center. The location is designed so that the thickest to be processed 3500 cartons in the straight line T, so then, if not discharged, is not touched to avoid damage such as markings. The spring-loaded lever 13 is also in its uppermost position. This position is defined by the stop pin 14, to which the lever 13 with spring force (spring 15) applies.

In the alternative embodiment, the spring 15 may be replaced by at least one controllable hydraulic or pneumatic cylinder. The lever 13 is then moved at a deflection of the ejector 7 at the same time by the cylinder and deflected into its lower position. The active deflection of the lever 13 ensures that the changeover of the device for discharging 200 from "do not eject the folding box" to "eject the reject box" takes place in the shortest possible time.

At position 37, a friction-reducing counter element could be let into the deflector plate 28. The counter-element may be, for example, a plurality of rolling bearings, a plurality of balls or a roller.

Fig. 2b shows the device for discharging 200 in its position "eject reject bin" in a detailed view. This can be seen in that the ejector 7 and the spring-loaded lever 13 are each in their lowest position. The drive of the ejector lever 7 by means of a servo motor 1, a clutch (not shown) and a hexagonal shaft 2. The hexagonal shaft 2 rotates an eccentric 3. The eccentric 3 in turn drives a coupling member 4, which is connected at the crosspoint 5 with the ejector 7 , The ejector lever 7 pivots about the axis 8, which represents a frame point. The hexagonal shaft 2 is also stationary. The foremost role of the ejector lever 7 pushes the upper conveyor belt 9 down. This will also deflected the lower conveyor belt 10 down. In addition, the spring-loaded lever 13 is pressed by the Auswerferhebel 7 via the belts 9 and 10 for discharging recognized as defective cartons 38 down. The auszuschleusende carton 38, also referred to as a reject box, is passed through the two deflected driven conveyor belts 9 and 10 between the deflector 28 and the rubberized driven ejector roller 27. The ejector roller 27 is adjusted by means of the adjusting eccentric 23 via the lever 24 so that the ejector roller 27 does not drag on the deflector plate 28. The adjusting eccentric 23 acts on the lever 24, which can rotate about the frame point of the axis 21 spring loaded.

The drive of the lower conveyor belt 10 is carried out permanently by the drive pulley 19. The drive pulley 19 is mounted fixed to the frame on the drive shaft 18. The upper conveyor belt 9 is coupled via a connecting drive 16 and a drive pulley 17 with the drive of the lower conveyor belt 10 and is driven with.

Fig. 3 FIG. 12 is a perspective view of the discharge device 200 without the adjoining machine modules. FIG. It shows the folding carton transport in folding carton gluing machines. This is usually either single track or as here two lanes running. The two-lane serves to prevent the twisting of wide cartons and to be able to transport and fold them safely. A conveyor belt pair each consists of an upper conveyor belt 9 and a lower conveyor belt 10. Each conveyor belt pair is assigned an ejector lever 7 (not shown). This results in that in the FIGS. 1a . 1b . 2a and 2 B shown elements ejector lever 7, Exzentertrieb 3, 4th spring-loaded lever 13 and conveyor belts 9, 10 are double. The control of the two ejector lever 7 via the two eccentric 3 via only one hexagonal shaft 2 and a servo motor. 1

Fig. 4 shows an alternative embodiment of the device for discharging 200. Here, in the Figures 1 - 3 shown ejector roller 27 has been replaced by a smaller guide roller 39. The deflection roller 39 is also driven by the lower conveyor belt 10. The ejection speed is the same Box transport speed, ie the speed of the conveyor belts 9 and 10. The necessary coefficient of friction for transporting the reject box 38 is generated via a line contact of the conveyor belt 10 with the auszuschleusenden box 38 and the Ableitblech 28. The Ableitblech 28 is in contrast to the Ableitblech 28 of Figures 1 - 3 Slightly modified: the deflector 28 is slotted and surrounds the guide roller 40. The guide roller 40 and the two rollers 34 arranged to the left thereof are designed without a conveyor belt and are driven only passively. The deflection roller 40 is smaller in radius than the two rollers 34 executed. Further, the guide roller 40 is arranged slightly below the conveying plane E, so as not to hinder the straight-line travel in the transport direction T. This has the advantage that the deflection roller 40 can rotate in the counterclockwise direction, without damaging the cartons 3800 conveyed in the transport direction T. The deflector plate 28 can be pulled into the gap between the rollers 40 and 41 and thereby improves the threading of the reject box 38 between deflector plate 28 and guide roller 39 so that the auszuschleusenden cartons 38 can be safely discharged.

LIST OF REFERENCE NUMBERS

1

servomotor

2

Hexagonal shaft

3

eccentric

4

Exzenterkoppelglied

5

Crosspoint of 4 and 7

7

ejector

8th

swivel axis

9

upper conveyor belt

10

lower conveyor belt

13

spring-loaded lever

14

stop pin

16

Connecting drive for drive of 9

17

Drive pulley for 16

18

drive shaft

19

Drive pulley for 10

21

Pivot axis of 24

23

adjusting eccentric

24

lever

27

driven roller

28

deflector

34

transport roller

38

box to be removed

39

idler pulley

40

idler pulley

41

role

100

folding station

200

Device for discharging

300

transfer station

1000

gluer

3800

folding

A

outward transfer

T

transport direction

e

conveying plane

Claims (10)

1. A device (200) for removing printed materials (38) such as sheets or folding box blanks made of paper, cardboard or the like, which are fed through at least two pairs of parallelly arranged conveyor belts (9, 10) each having an upper conveyor belt (9) and a lower conveyor belt (10) and each having a deflecting element (7) for deflecting the respective upper (9) and lower (10) conveyor belt downwards with respect to the horizontal transport plane (E), wherein the printed materials (38) to be removed are diverted from their horizontal transport direction (T) to a removal direction (A), wherein
   said deflecting elements (7) are directly or indirectly connected to a shaft (2), characterized in that
   said shaft (2) is driven by an actuator (1), in particular a servomotor,
   and that eccentric disks (3) are mounted on the shaft (2) in a rotationally stable manner, wherein a respective eccentric disk (3) is assigned to a respective deflecting element (7) and acts thereon, wherein the rotation of the shaft (2) having the eccentric disks (3) by said deflecting elements (7) causes the deflection of conveyor belts (9, 10) and thereby the removal of a printed material (38).
2. The device for removing according to claim 1,
   characterized in that
   a guide plate (28) which is positioned in a flat angle with respect to the horizontal transport plane (E) is arranged in the discharging direction (A) after the deflecting elements (7).
3. The device for removing according to claim 2,
   characterized in that
   a driven ejector roll (27) is arranged opposite to the guide plate (28), whereby a printed material (38) to be removed is fed in a state of being sandwiched between the guide plate (28) and the ejector roll (27), wherein the circumferential speed of said ejector roll (27) is larger than or the same as the speed of the conveyor belts (9, 10).
4. The device for removing according to claim 3,
   characterized in that
   opposite to the driven ejector roll (27), a plurality of parallelly arranged rolling bearings, in particular radial ball bearings, are embedded in said guide plate (28), said bearings being slid on an axis which is parallel to the axis of said ejector roll (27) and their inner rings and their outer rings being elevated with respect to said guide plate (28).
5. The device for removing according to claim 3,
   characterized in that
   opposite to said driven ejector roll (27), a plurality of rotatable balls which are elevated with respect to said guide plate (28) are embedded in said guide plate (28).
6. The device for removing according to claim 3,
   characterized in that
   opposite to the driven ejector roll (27), a second roll having an axis parallel to the axis of said ejector roll (27) is arranged having a jacket surface which is elevated with respect to said guide plate (28).
7. The device for removing according to any one of claims 3 to 6,
   characterized in that
   said ejector roll (27) is rubberized.
8. The device for removing according to any one of claims 3 to 6,
   characterized in that
   said ejector roll (27) is provided with cogs or needles.
9. A folding box gluing machine (1000) comprising a device for removing (200) according to any one of the preceding claims.
10. The folding box gluing machine according to claim 9,
    characterized in that
    said device for removing (200) is designed as an independent machine module of said folding box gluing machine (1000) and is arranged upstream of a transfer station (300) of said folding box gluing machine (1000) and that said transfer station (300) and said device for removing (200) are designed to be operated with different speeds.

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