EP0835837A2 - Method of and device for avoiding production failures in folding devices - Google Patents

Abstract

The print products are moved on the folding table plate (6,7) and finally retained by stops (16,25) which have collision surfaces. Directly before the stops, any collected loose material is removed during operation, so that the stops which are located between spaces are removed and the spaces are in communication with one another. The stops, individually or in groups, are vertically movable in relation to the folding table plate (6). A cleaning device may be provided in the area of the folding table plate, which acts on the collision surface. The print products are movable by transport devices (12,13) spaced apart from one another and acting parallel to one another.

Description

The invention relates to a method for preventing Production disruptions on folding devices accordingly the preamble of claim 1 and an associated one Contraption.

DE 32 39 799 C2 is a longitudinal folding device known in which the folded copies before Introduction of a second longitudinal fold - a so-called third fold - in the direction of transport against a number run from attacks. Below are the Folded copies using a longitudinal folding knife as well two fold rollers longitudinally folded.

From practice it is known that small pieces of paper collect before the attacks during production.
Normally, such a piece of paper builds up only at one stop. This causes the signature to stop diagonally and is then folded diagonally. If larger pieces of paper get caught on several strokes, this leads to blockages and thus to longer production downtimes.

In order to eliminate the above-mentioned faults, the machine must be stopped and the snippets removed in accordance with the currently applicable accident prevention regulations. It also happens that the closed protective grille with slim tools tries to push the snippets away during production before the stop.
It is not possible to remove snippets by simultaneously lifting all the stops during production, since the folded product passes the stop line and the stops can then no longer be reset.

The invention has for its object a method and an associated device for a To create folding device with the Production disruptions due to paper residues or Paper particles can be avoided.

According to the invention, this object is achieved by the features of the characterizing parts of claims 1 and 2 solved.

The advantages that can be achieved with the invention are, in particular, that the smaller or larger pieces of paper that collect in front of the attacks, ie loose parts of printed products, are removed as a result of the movement of the attacks and thus the action of the attacks against wipers during operation. Since not all stops are moved at the same time according to one embodiment variant, a part number of stops can continue to be produced during cleaning, ie the third fold can be introduced. This avoids an oblique folding of the printed products or blockages in the folder.
In addition, it is possible to disengage all stops from the printed products at the same time. This means that there is sufficient space for those types of production that do not receive a third fold, but that are passed on for further processing after they have passed through the longitudinal fold direction.

Several embodiments of the invention are in the Drawing shown and are closer below described.

Fig. 1

eine Seitenansicht der Längsfalzeinrichtung, entgegen der Zufuhrrichtung der Signaturen gesehen, jedoch ohne Darstellung einer Signatur;

Fig. 2

einen Schnitt II - II nach Fig. 1, jedoch mit Darstellung einer Signatur;

Fig. 3

eine vergrößerte schematische Schnittdarstellung eines den Falztisch an der Stelle des Schnittes II - II durchquerenden Anschlages in einem zweiten Ausführungsbeispiel;

Fig. 4

eine schematische Darstellung von weiteren Bewegungsrichtungen der Anschläge.

Show it

Fig. 1

a side view of the longitudinal folding device, seen against the feed direction of the signatures, but without showing a signature;

Fig. 2

a section II - II of Figure 1, but showing a signature.

Fig. 3

an enlarged schematic sectional view of a stop crossing the folding table at the point of section II-II in a second embodiment;

Fig. 4

is a schematic representation of further directions of movement of the stops.

A folder 1 - z. B. Longitudinal folding device - consists in a known manner of a driven Folding roller pair, 2, 3, a clockwise up and outgoing folding knife 4 and a frame-mounted Folding table 6, 7 towards the folding gap 8 rounded longitudinal edges 9, 11. A printed product 10 (Fig. 2), e.g. B. a signature or a single sheet, is on the left and right parts of several upper conveyor belts 12 and lower conveyor belts 13 detected and in the transport direction or Production direction C against one impact surface each 26 of the stops 16 to 25 and subsequently with a second longitudinal fold, d. H. a third fold Mistake.

The printed product 10 is between parallel acting means of transport, for. B. between the lower debris of the upper conveyor belts 12 and the upper debris of the lower conveyor belts 13. Suction belts, suction slides and the like can also be used as a means of transport. The stops 16 to 25 are spaced between the conveyor belts 12, 13 and can each consist of a rectangular sheet. The stops 16 to 25 are each connected to a linear drive, for. B. at the end of a piston rod 27 of a double-acting pneumatic cylinder 28 by means of a bracket 30. All working cylinders 28 are fastened to a carrier 29 which corresponds to the maximum width of the printed products 10. The carrier 29 is supported on both sides by means of tabs 14, 15 on brackets 31, 32 mounted on the frame. Each of the stops 16 to 25 located at the end of the piston rod 27 can each be arranged in a longitudinal guide vertically arranged in the carrier 29, e.g. B. slot 33 guided, that is adjustable in height, that is to say arranged in a vertical plane D back and forth. Each working cylinder 28 has two connections 34, 36. First connections 34 of the working cylinder 28 of every second stop 16, 18, 20; 25, 23, 21 are connected by means of a common pipeline 37 and are therefore subject to a common control command. The second connections 36 are connected to a common pipeline 39 and are also subject to a second common control command.
First connections 41 of the working cylinder 28 for the remaining stops 17, 19; 22, 24 are connected by means of a pipeline 42 and second connections 43 of the working cylinders 28 are connected to a pipeline 44.
The pipes 42, 44 also each correspond to separate control commands. The pipes 37, 39, 42 and 44 of the working cylinder 28 are connected to a compressed air reservoir, not shown, and an associated known control.

Each cylinder 28 is on the back of the Carrier 29, one in the direction of folding table 6 extending rectangular bracket 46 assigned, its second leg near the lower edge 47 the carrier 29 is bent and subsequently against the production direction C parallel to the Folding table 6 extends. This bracket 46 can its lower side, the folding table 6, 7 in the Cross-section be dovetail-shaped and one directed against the stop 16 to 25 Cleaning device, e.g. B. Scraper Knife 48 record, tape. The scraper knife 48 is a sheet metal strip trained, which with its in the production direction C facing lower edge 49 frictionally with the Impact surface 26 of each stop 16 to 25 in Connection is established (Fig. 2).

The device works as described below. As a result of a tax command are about half the number n / 2 17, 19, 22, 24 of the total number n of stops 17, 19, 22, 24; 16, 18, 20, 25, 23, 21 in an upper one Cleaning position A is located, d. H. they stand with a printed product 10 disengaged and are by means of the piston rods 27 of the working cylinder 28 upwards drawn. Thus the number mentioned is n / 2, i.e. one Group of stops 17, 19, 22, 24, d. H. about everyone second stop temporarily from the trajectory C the Print products have been spent. The scraper knives 48 thus face the impact surfaces 26 of the stops 16 to 25 in a relative movement to each other. In the Movement of the stops 17, 19, 22, 24 from the lower Operating position B in the upper cleaning position A have the edges 49 of the wipers 48 each with the Impact surface 26 stops 17, 19, 22, 24 frictionally cooperated so that a lower edge 51 of each Stops 17, 19, 22, 24 completely from paper residues 52 was cleaned (Fig. 2).

Alternately with the aforementioned groups of attacks 17, 19, 22, 24, the stops 16, 18, 20, 25, 23, 21 from a lower operating position B into a upper, removed from the folding table top 6, 7 Cleaning position A are brought.

Should printed products have no additional, e.g. B. third Receive fold, it is also possible to stop all 16 to 25 in the upper cleaning position A. The folding device 1 is thus removed from the printed products run through.

According to another embodiment variant, a Group of first stops 17, 19, 22, 24 on a first common carrier and a group of second stops 16, 18, 20, 25, 23, 21 on a second common support be fixed. Each of these two carriers is e.g. B. adjustable on both sides by linear drives, e.g. B. arranged pull up.

Furthermore, it is possible for the stops 16 to 25 to be spaced apart from one another and individually or in groups 17, 19, 22, 24; 16, 18, 20, 21, 23, 25 are arranged to be pivotable about a pivot axis 61 from a vertical position of a y-axis 60 through an angle alpha in the production direction C. The pivot axis 61 runs parallel to the z axis 62 of a spatial coordinate system (FIG. 4). As a result, the stops 16 to 25 can be pivoted with their lower edges 51 from an operating position B into a cleaning position A (FIG. 1).
The lower edges 51 can be cleaned manually or by means of brushes, rotatable brush rollers or air nozzles.

It is also conceivable for the stops 16 up to 25 around individual swivel axes, e.g. B. 63, 64 etc. of a vertical one parallel to the y-axis 60 Arrange position pivotable by an angle beta. The Pivot axes 63, 64 run parallel to the axis x-axis 66 of a spatial coordinate system (Fig. 4).

In addition, it is conceivable for the working cylinders 28 to be replaced by electric servomotors.

In another embodiment, the Cleaning device for the impact surfaces 26 of the Stops 16 to 25 on the respective bracket 46 a Brush be attached, the brushes and the Impact surfaces in a vertical plane of movement D are arranged frictionally displaceable to each other.

It is quite possible instead of one at a time fixed brush one with a known drive provided rotating brush as a cleaning device to be provided for each of the impact surfaces 26. Thus in addition to the linear movement D of the impact surfaces 26 a rotary movement of the brush is superimposed.

In a further embodiment variant, it is also possible as a cleaning device for each of the Impact surfaces 26 of the stops 16 to 25 on Bracket 46 attached, with the nozzle mouthpiece to arrange the impact surface 26 directed air nozzle. Each time you move the stops 16 to 25 in the Movement level D from operating position B to Cleaning position A is achieved by one of each Nozzle coming coming air flow each Impact surface 26 of possibly adhering paper residues 52 cleaned.

It is also quite possible below each one Scraper 48, i. H. between wipers 48 and Folding table top 6, 7 each have a pressure brush to attach. The pressure brushes press the printed product 10 in the gaps between the side by side Conveyor belts 12, 13 against the folding table top 6, 7 on.

In a second embodiment are also in a vertical movement plane D back and forth Stops 16 to 25 are provided, the impact surfaces 26th one each conveyed by the conveyor belts 12, 13 Stop print product 10. There is an end to this 53 each stop 16 to 25 in a plane B of the Top side 54 of the folding table top 6, 7.

In case of accumulation of paper remnants 52 or Paper particles and the like at the end of one or more Stops 16 to 25 pass through the ends 53 Folding table top 6, 7 or penetrate into the folding table top 6, 7 a. For this reason, the folding table top 6 has 7 from its top 54 to its bottom 57 extending breakthroughs 56, at least the Cross section of a stop 16 to 25 have.

After a first variant, the ends penetrate 53 of the stops 16 to 25 from an operating position or on the upper side 54 of the folding table 6, 7 level B to one on the underside 57 of the folding table 6, 7 level or Cleaning position E before (dashed in Fig. 3 shown). The remnants of paper on top, edges 58 of impact surfaces 26 Breakthroughs 56 stripped. By withdrawing the End 53 to above level B, the paper scraps fall down through the openings 56.

Instead of an upper edge 58, a plane B the top 54 of the Falztlsches 6, 7 arranged, in scraper knife protruding every breakthrough Stripping of the scraps of paper may be provided.

According to a second embodiment, the ends penetrate 53 of the stops 16 to 25 - except 20 and 21 - from one Operating position or level B through level B up to one, e.g. B. at a distance of the thickness of a folding table 6th level or cleaning position F before (in Fig. 3 shown in dashed lines). The Paper scraps on one below level E. stripper-fixed scraper knife 59 stripped. It is also possible, only the stops 16 to 25 - except 20 and 21 - to level F and subsequently the Scraper knife 59 to start.

As shown above, a cleaning device can each Stop above, inside or below the Folding table top 6, 7 may be arranged.

According to a third and fourth design variant between levels E and F instead of one Scraper knife 59 either brushes or air nozzles provided on the impact surfaces 26 of the stops 16 to 25 act.

The drives can be designed as in first embodiment described. Additional However, there are advantages in that Not necessarily the stops 16 to cleaning purposes 25 must be lifted from the folding table 6, 7.

It is also quite possible to only use a single or several selected stops 16 to 25 of one Working position in a cleaning position spend.

The stops 16 to 25 each separate one from the other them forming storage space for scraps of paper, dust or the like of an empty large one lying behind them Storage space. If the stops 16 to 25 z. B. moved vertically up or down, so both Storage spaces combined and the front of the Attacks 16 to 25 scraps of paper, etc. get into the rear large storage space from where they can be dissipated. The whole can be during the Run happen because each stop is 16 to 25 individually moved independently of others or in groups can be that the spaces in front of and behind the attacks 16 to 25 connected without any disabilities come.

Reference list

1

Folding device

2nd

Folding roller

3rd

Folding roller

4th

Folding knife

5

-

6

Folding table top

7

Folding table top

8th

Folding gap (2, 3)

9

Long edge (6)

10th

Printed matter

11

Long edge (7)

12th

Conveyor belt, upper

13

Conveyor belt, lower

14

Tab (29)

15

Tab (29)

16

up to 25 stops

26

- impact surface (16 to 25)

27

Piston rod (28)

28

Working cylinders (16 to 25)

29

Carrier (28; 16 to 25)

30th

Bracket (27)

31

Bracket (29)

32

Bracket (29)

33

Slot (29)

34

Connection (28; 37)

35

-

36

Connection (28, 39)

37

Pipeline (34; 16, 18, 20, 21, 23, 25)

38

-

39

Pipeline (36; 16, 18, 20, 21, 23, 25)

40

-

41

Connection (28, 42)

42

Pipeline (41; 17, 19, 22, 24)

43

Connection (28, 44)

44

Pipeline (43; 17, 19, 22, 24)

45

-

46

Bracket (16 to 25)

47

Lower edge (29)

48

Doctor blades (16 to 25)

49

Lower edge (48)

50

-

51

Edge, lower (16 to 25)

52

Rest of paper

53

End (16 to 25)

54

Top (6, 7)

55

-

56

breakthrough (6, 7 for 16 to 25)

57

Bottom / 6, 7)

58

Top edge (56)

59

Scraper knife

60

y-axis coordinate system

61

Swivel axis (16 to 25)

62

z-axis coordinate system

63

Swivel axis

64

Swivel axis

65

-

66

X axis Coordinate system

A

Cleaning position

B

Operating position

C.

Production direction

D

Level (16 to 25)

E

level

F

level

n

Number (16 to 25)

alpha

Swivel angle

beta

Swivel angle

Claims (16)

Process for preventing production disruptions in a device (1) for the further processing of Printed product (10), such as signatures, individual sheets or Like., With the printed products (10) on a Folding table top (6, 7) moves and finally each of impact surfaces (26) having stops (16 to 25) are stopped, characterized in that accumulated immediately before the attacks (16 to 25) loose parts, e.g. B. of printed products (10) itself originating, thereby removed during operation be that the stops acting as a lock (16 to 25) between a space in front of and behind the stops (16 to 25) are removed so that both rooms in Connect. Device for preventing production disruptions in a device (1) for further processing of Printed products (10), such as signatures, individual sheets or Like., With the printed products (10) on a Folding table top (6, 7) moves and finally each of impact surfaces (26) having stops (16 to 25) are stopped, characterized in that the Attacks (16 to 25) individually or in groups (17, 19, 22, 24; 16, 18, 20, 21, 23, 25) with respect to the Folding table top (6, 7) are vertically movable. Device according to claim 2, characterized in that a cleaning device in the area of Folding table top (6, 7) is provided, each on the impact surface (26) acts. Device according to claims 2 and 3, characterized characterized in that the printed products (10) by means of spaced apart, acting parallel to each other Transport means (12, 13) are movable. Device according to claims 2 to 4, characterized characterized in that the stops (16 to 25) are vertical to the direction of movement (C) of the printed products (10) back and forth are arranged movably. Device according to claims 2 to 4, characterized characterized in that the stops (16 to 25) by one Pivot axis (61) are arranged pivotably that the Swivel axis (61) parallel to the z-axis (62) of one spatial coordinate system (60, 62, 66). Device according to claims 2 to 4, characterized characterized in that the stops (16 to 25) around individual pivot axes (63; 64) are pivotally arranged are that the pivot axes (63; 64) each axially parallel to the x-axis (66) of a spatial Coordinate system (60, 62, 66) run. Device according to claims 2 to 5, characterized characterized in that the cleaning device each above, inside or below the folding table top (6, 7) is arranged. Device according to claims 2 to 5 and 8, characterized in that the cleaning device each as against the impact surface (26) of the stops (16 to 25) scraper knife (48; 59) is trained. Device according to claims 2 to 8, characterized characterized in that the cleaning device each from one against the impact surface (26) of the stops (16 to 25) acting brush. Apparatus according to claim 10, characterized characterized in that the brush is rotatable is. Device according to claims 2 to 8, characterized characterized in that the cleaning device each consists of an air nozzle that an on and switchable airflow of the air nozzle against the Impact surface (26) is directed. Device according to claims 2 to 12, characterized characterized in that each stop (16 to 25) Linear drive (27; 28) is assigned. Device according to claims 2 to 12, characterized characterized in that each group of stops (17, 19, 22, 24; 16, 18, 20, 21, 23, 25) at least one Linear drive (27; 28) is assigned. Device according to claim 13, characterized characterized in that the linear drive (28) from a pneumatic piston-cylinder unit (27; 28). Device according to claim 13, characterized characterized in that the linear drive (27; 28) from a electric actuator exists.

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