EP0977668B1 - Device for adjusting folding jaws - Google Patents

Abstract

The invention relates to a device for adjusting the gripping clearance between pairs (29) of folding jaws (31, 32) of a folding jaw system. According to the invention, the run of the flying cam (52) is inclined in its axial width, and is arranged so that it can move in relation to the carrying roll (51).

Description

The invention relates to a device for setting of the clamping gap between jaws according to the Preamble of claim 1.

DE-GM 19 38 644 is a jaw cylinder a folder of rotary printing presses with cam-controlled jaws and resilient Counter flaps are known, the controlled Jaw spindles and the resilient counter flaps two separate, rotatable to each other Cylinder body parts are arranged. Both Cylinder body parts are used to adjust the Product thickness using a wedge against the force a spring adjusted to each other.

The disadvantage of this jaw cylinder is that two cylinder body parts that are complex to produce have to be adjusted.

DE-OS 27 55 361 describes a folding jaw cylinder a rotary printing press. Control curves of the Folders are for setting one Opening time of the jaws in the circumferential direction and to change the operating mode in the axial direction of the jaw cylinder adjustable.

DE-OS 21 03 946 discloses a jaw cylinder, where the jaw shafts by means of gears are synchronized with each other.

EP 00 95 605 A2 shows a controller for a Folding flap of a flap cylinder in the folder from Rotary printing machines. Here is the angular position between the jaw and the associated roller lever changeable.

The invention has for its object a Device for adjusting the clamping gap between Pairs of jaws of a jaw cylinder create.

This object is achieved by the features of claim 1 solved.

The advantages that can be achieved with the invention exist especially in that thick folded products up to 192 Pages folded with relatively little force can be. By working through the Pre-fold clamping elements exactly the middle of the fold break is defined, an accurate cross fold is created, especially both halves of the signatures are each the same Amount of penetration depth of the folding knife into the Pre-fold clamping gap. Since the cross folding in two stages, pre-folding and finishing folding are done the forces required for each folding stage decreased. Through the use of cylindrical Pre-fold clamping elements of the pliers-like effect Pre-fold clamping element systems are the one with the Pre-fold clamping gap in the connected side surfaces of the pre-folded product treated without damage. The finished folding of the Pre-fold product up to 192 pages as a result of Use of folding rollers free of damage.

By creating a facility for adjusting the Clamping gap between jaws is the arrangement of complex, rotatable to each other Avoided cylinder body parts. Using a simple Transmission can be the distance from jaws can be preset. Furthermore, this facility is also for Presetting pairs of on a pre-folding cylinder pre-fold clamping elements.

An embodiment of the invention is in the Drawing shown and will be described in more detail below described.

Fig. 1

einen Querschnitt durch eine schematische Darstellung eines Falzapparates;

Fig. 2

einen Querschnitt durch eine vergrößerte schematische Darstellung eines Vorfalz-Klemmelementes, welches soeben ein Querfalzprodukt aufgenommen hat;

Fig. 3

einen Längsschnitt III - III nach Fig. 1, wobei nur ein Ende eines Vorfalzzylinders mit einer zentralen Steuerung der Vorfalz-Klemmelementen-Systeme dargestellt ist.

Show it

Fig. 1

a cross section through a schematic representation of a folder;

Fig. 2

a cross section through an enlarged schematic representation of a pre-fold clamping element, which has just received a cross-fold product;

Fig. 3

a longitudinal section III - III of FIG. 1, only one end of a pre-folding cylinder with a central control of the pre-folding clamping element systems is shown.

Between side frames 1; 2 are two Longitudinal funnel 3; 4 arranged, which at their Paper inlet side driven by a motor 6 Have funnel inlet roller 7. At hers Funnel outlet side are a pair between each Side frames 8; 9 existing funnel folding rollers 11, one pull roller group 12 and one transfer roller 13 each arranged which one or more strands of paper 14; 16 via a main draw roller group 17 also between the side frames 8; 9 stored Cross cutting and cross folding device 18 passes. The Cross-cutting and cross-folding device 18 has one known two-part, d. H. with two cutting knives 19 provided cutting cylinder 21, which in turn against a known five-part folding knife, Groove strip and pin cylinder 22 - or also Called transport and folding knife cylinder - works. This cylinder 22 has five on its circumference arranged folding knives and folding knife fittings 23, Grooved strips 24 and puncture systems 26.

The cross cutting and cross folding device 18 has continue a rotating body, e.g. B. one Prefolding cylinder 27 with a number n, z. B. three, five or seven, but preferably five in uniform Distributed distances around its circumference 42 Prefold clamping element systems 28, each with the folding blade fittings 23 of the cylinder 22 cooperate (Fig. 1).

Each of the pre-fold clamping element systems 28 consists of a number m of two to ten are in axially parallel Direction of the pre-folding cylinder 27 side by side and spaced from each other by a clear distance a arranged jaw-like pairs 29 of folding jaw-like pre-fold clamping elements 31; 32.

Between side walls 33 of the pre-folding cylinder 27 - in Fig. 3 shows only one side wall 33 - are two Waves 34; 36, e.g. B. hollow shafts, with the Pre-fold clamping elements 31; 32 equipped. The ends of the Waves 34; 36 are in the side walls 33 of the Vorfalzzylinders 27 stored and are together by means of shaft segments 37; 38 or Synchronized gears. At the center of the shaft 34; 36 is a torsion bar spring 39; 41 used. One each End of the torsion bar 39; 41 is with the shaft 34; 46 connected; the other end of the torsion bar 39; 41 is fixed in a tensioning device, not shown.

This tensioning device is located on the outside the side wall, not shown, that of the side wall 33 opposite.

Each pre-fold clamping element 31; 32 is on his end near the periphery and at the end with the pre-folded product related side with a thickening educated. For this purpose, the shaft 34 carries radially in the direction Periphery 42 of the pre-folding cylinder 27 directed, finger-like resilient carrier 43. Each carrier 43 supports its end near the periphery in an axially parallel Direction to the pre-folding cylinder 27 cylindrical Thickening 46. the one that acts on the folded product End of the pre-fold clamping elements 31; 32 is compared to the carrier 43.

The second shaft 36 carries carrier 44 in the same way each with a cylindrical Thickening 47. The carrier 43; 44 with the thickening 46; 47 each work as pairs 29 of Pre-fold clamping elements 31; 32 together.

It is also possible to support 43; 44 and the associated thickening 46; 47 in one piece.

These thickened ends are not only with pre-fold clamping elements 31; 32 usable, but also in general for jaws.

On one of the waves, e.g. B. the shaft 34 is located rotatably on the shaft end with the clamping point of the Torsion bar spring 39 a control arm 49. The control arm 49 has a roller 51 at its end remote from the torsion bar on which is fixed on a known side frame Cam track 52 expires.

This cam track 52 has elevations and Wells to create a stroke to open and Closing the pre-fold clamping elements 31; 32 on.

Rotation axes 53; 54 of the pre-folding cylinder 27 and the Folding knife, grooved and pin cylinder 22 are by means of an imaginary central 56 and the The axis of rotation 54 is by means of an imaginary control center 57 to an axis of rotation 58 of the cutting cylinder 21 spaced. Below these centers 56; 57 is the Cylinder 22 with side frame-fixed paper guide rods 59 surrounded.

The pre-folding cylinder 27 are two between the Side frames 8; 9 spring-loaded, also to the cross-cutting and cross-folding device 18 associated folding rollers 61; 62 to finish folding the Subordinate print products. The transportation of pre-folded printed products between the pre-folding cylinder 27 and the folding rollers 61; 62 takes place by means of two interacting belt systems 63; 64.

The bands of the first band system 63 are on the circumference 42 of the pre-folding cylinder 27 in between the pairs 29 of Pre-fold clamping elements 31; 32 grooves 66 and part of the circumference of the first folding roller 61 guided. In each case at such points of the grooves 66 of the Pre-folding cylinder 27, on which one Prefold clamping element system 28 is located, the Pre-folding cylinder 27 opposite the periphery 42 secant-like, parallel to the axis extending surface 67 (Fig. 2). This area has 67 between the closed pairs 29 the Pre-fold clamping elements 31; 32 a depth t which is greater is as twice the radius r of the thickenings 46; 47.

Also on the circumference 76 of the transport and Folding knife cylinder 22 at the point where Folding knives 23 are arranged, one each secant-like, parallel to the axis Transport and folding knife cylinder 22 extending surface 77 provided.

The second belt system 64 is above and to the side of the Pre-folding cylinder 27 by means of tape guide rollers 68 partly around the pre-folding cylinder 27 and around the second Folding roller 62 guided. Both belt systems 63; 64 act together.

The clear distance between the two folding rollers 61; 62 is according to the thickness of the cross fold product a known folding roller gap adjustment device 74 adjustable. Both folding rollers 61; 62 are therefore in known manner resiliently mounted against each other to without prejudice at times a thickening of folded products, e.g. B. after the change and the connection of Paper webs to compensate.

Above the cylinder 22; 27 are between the inlet the strands of paper 14; 16 and the second belt system 64 side frame-fixed paper guide rods 70 arranged.

Below the folding rollers 61; 62 is in the side frame 8; 9 shows a known paddle wheel 69 with a known one Printed product ejection system 71 for displaying the Cross fold products arranged on a delivery belt 72. The delivery belt 72 is on the side of the impeller 69 in in the vertical direction upstream.

The opening width of the pairs 29 of Pre-fold clamping elements 31; 32 is by means of the shape of the Cam track 52 adjustable.

In order to set the product thickness of the signatures 78 to be prefolded, the control cam track 52, viewed in the axial direction in cross section, has a width f which corresponds to a multiple width of the roller track. The control cam track 52 has an incline in cross section, ie over a thickness of the control cam 84, which increases in the direction of the side frame 8. As a result, the control cam 8 is frustoconical and is arranged to be displaceable in the axial direction E of the pre-folding cylinder 27. The control cam 84 has a central bore and is laterally fastened to a sleeve-shaped control cam carrier 86, an inner diameter of the central bore and an inner diameter of the control cam carrier 86 being the same and both parts 84; 86 are preferably formed in one piece (Fig. 3).
The control cam carrier 86 is arranged together with the control cam 84 coaxially on a bearing bush 87 fixed to the side frame, which in turn accommodates a shaft journal 88 of the pre-folding cylinder 27, mounted in a ball bearing 89 inside. The sleeve-like part of the cam carrier 86 has on its lateral surface 91 an external thread 92 and is by means of z. B. a feather key 93 on the cam carrier 86 against rotation and axially displaceable.

With the external thread 92 of the cam carrier 86 an internally threaded sleeve 94 which engages on its side near the side frame in one piece with a Guide ring 96 is connected. The guide ring 96 is rotatably supported with its inner tread the lateral surface 91 of the cam carrier 86 from and is z. B. by means of a two-part side frame fixed Retaining ring 97, which in a in the outer surface 98th circumferential annular groove 99 engages against axial Movement secured.

The inner threaded sleeve 94 has on its outer surface 98 a toothing 101, which z. B. by means of a Timing belt 102 with a pulley 103 side frame fixed motor 104 is connected. With the Motor 104 is non-rotatable with a rotary encoder 106 coupled.

Now the pre-fold nip 81 due to the changed thickness of another folded product changed become, by means of the drive 104 to 101 Inner threaded sleeve 94 rotated, so that thereby Control cam carrier 86 is moved in the axial direction E. The roller 51 is located on the cam track 52 in another, e.g. B. higher position than in Fig. 3 shown, the width of the Pre-fold nip 81.

Instead of the crowned version seen in cross section Tread of the control roller 51 can also be frustoconical and thus adhere to the Adjust the slope of the cam track 52. there the slope of the cam track 52 corresponds to one Height of the control roller stroke 51.

It is also possible to use folding jaws from The width of the jaw cylinders can be adjusted.

According to a further embodiment variant, the Cam track 52 also arranged fixed to the side frame and the control arm 49 carrying the roller 51 can be opened the spindle or the torsion bar spring 41 in the axial Direction adjustable. However, it is essential that those with respect to the axis of rotation 53 of the pre-folding cylinder 27 inclined cam track 52 relative to cam roller 51 is slidably arranged.

A procedure for cross-folding signatures is as follows.
From the stacked paper strands 14; 16, with the cooperation of the cutting cylinder 21 on the folding knife, grooved and pin cylinder 22, signatures 78 are cut, which are recorded on their leading edge in the running direction B of the cylinder 22 of a leading part 79 of the signature 78 by means of the puncture systems 26 and a pre-fold clamping elements System 28 of the pre-folding cylinder 27 are supplied. Each signature 78, collected or not collected, is pushed into a pre-fold clamping gap 81 of the pre-fold clamping element system 28 by means of a folding knife 23 located on the cylinder 22. Both the leading part 79 and a trailing part 82 of the signature 78 are pushed into the pre-fold nip 81 by an amount of the depth of penetration of the folding knife 23. Fig. 2 shows a position D of the cylinders 22; 27, in which both the pre-fold clamping elements 31; 32 and the folding knife 23 have already passed through the center 56 by an angle of rotation alpha. After the folding knife 23 has been withdrawn (FIG. 2), the pre-fold clamping elements 31 close; 32 pliers-like, or mouth-like, and form a pre-fold 83 on the signature 78.

The punctures of the puncture system 26 during the introduction of the signature 78 in the Pre-fold clamping gap 81 counter-clockwise B of the transport and forme cylinder 22 from the leading part 79 of the signature 78 pulled out (see also DE 195 33 064 A1).

The fact that the thickenings 46; 47 the carrier 43; 44 are cylindrical, the pre-fold 83 beyond an imaginary line of contact between the two Thickenings 46; 47 and within the two Pre-fold clamping elements 31; 32 designed as a bead. The pre-fold product 83; 79; 82 during further transport on the pre-folding cylinder 27 not from the closed pre-fold clamping elements 31; 32 slip out. Thus the radius r is one Thickening 46; 47 less than the penetration depth of one Folding knife 23 in a pre-fold nip 81. After about a quarter turn of the pre-folding cylinder 27 - from position 56 of the prefolding from - in Counterclockwise direction of rotation C is not shown Prefold product between the two belt systems 63; 64 added. After about half a turn of the pre-folding cylinder 27 after the pre-folding process the tape systems 63; 64 from the pre-folding cylinder 27 (in 1)), the first belt system 63 the pre-fold product with the pre-fold clamping elements open 31; 32 has just lifted 83 on its pre-fold and both belt systems 63; 64 the pre-fold product the folding roller 61; Feed 62 to finish folding.

After leaving the folding rollers 61; 62 will Hand over the finished folded printed product to the paddle wheel 69 and subsequently deposited on the delivery belt 72.

In addition to the advantages already mentioned the advantages of pre-folding in two-stage cross folding in that by rounding the peripheral parts the pre-fold clamping elements for the signature a larger one Support distance between folding knife and Pre-fold clamping element is present than in known ones Folding jaw systems. Because of this larger support distance and the rounding of the peripheral parts can be thick Folded products without damage and with less force than with the conventional jaw systems in the Pre-fold nip are introduced. The rounded Pre-fold clamping elements protect due to their large size Contact area the outer layers of the folded product. The Inner layers of the folded product are protected that the folding knife over the rounded Pre-fold clamping elements can unwind without doing that Pinch the pre-fold product.

In order to tear the punctures during the pre-folding process prevent the punctures from retreating the leading edge of the leading part of the signature additionally by an amount of the penetration depth of the Folding knife moved back into the pre-fold nip.

Reference list

1

Side frame

2nd

Side frame

3rd

Longitudinal folding funnel

4th

Longitudinal folding funnel

5

-

6

Motor (7)

7

Hopper inlet roller

8th

Side frame

9

Side frame

10th

-

11

Funnel folding roller (3; 4)

12th

Draw roller group (3; 4)

13

transfer roller (3)

14

Strand of paper

15

-

16

Strand of paper

17th

Main draw roller group

18th

Cross cutting and cross folding device

19th

Cutting knife (21)

20th

-

21

Cutting cylinder (18)

22

Folding knife, slot bar and pin cylinder (18)

23

Folding knife armature (22)

24th

Groove strip (22)

25th

-

26

Puncture system (22)

27

Pre-folding cylinder (18)

28

Pre-fold clamping element system

29

Couple (31; 32)

30th

-

31

Pre-fold clamping element

32

Pre-fold clamping element

33

Sidewall (27)

34

Wave (28)

35

-

36

Wave (28)

37

Tooth segment (34)

38

Tooth segment (36)

39

Torsion bar spring (34)

40

-

41

Torsion bar spring (36)

42

Periphery, scope (27)

43

Carrier (34)

44

Carrier (36)

45

-

46

Thickening (43)

47

Thickening (44)

48

-

49

Control arm (39)

50

-

51

Track roller (49)

52

Cam track

53

Rotation axis (27)

54

Rotation axis (22)

55

-

56

Head Office (53; 54)

57

Head Office (54; 58)

58

Rotation axis (21)

59

Paper guide rods

60

-

61

Folding roller (18)

62

Folding roller (18)

63

Belt system, first

64

Belt system, second

65

-

66

Groove (63)

67

Surface (42)

68

Belt guide roller

69

Paddle wheel

70

Paper guide rods

71

Printed product ejection system

72

Delivery belt

73

Guideline

74

Folding roller gap adjustment device

75

-

76

Scope (22)

77

Surface (76)

78

signature

79

Forward part (78)

80

-

81

Pre-fold nip (28)

82

Trailing part (78)

83

Pre-fold (78)

84

Control curve (27)

85

-

86

Control cam carrier (84)

87

Bearing bush (88; 86)

88

Shaft journal

89

Ball bearing (88)

90

-

91

Lateral surface (86)

92

Male thread (91)

93

adjusting spring

94

Internal thread sleeve (96)

95

-

96

Guide ring (94)

97

Retaining ring

98

Lateral surface (96)

99

Ring groove (98)

100

-

101

Toothing (94, 98)

102

Timing belt

103

Tooth lock washer

104

engine

105

-

106

Angle of rotation encoder (104)

107

Outside (33)

108

Rotation axis (51)

B

Direction of rotation (22)

C.

Direction of rotation (27)

D

Position (22; 27)

E

Direction of movement (84, 86)

a

Distance (47, 47; 46, 46)

f

Width (84)

m

Number (28)

n

Number (29)

r

Radius (46; 47)

t

Depth (67)

alpha

Angle of rotation (22; 27; 56)

Claims (8)

1. Device for adjusting the clamping gap between pairs (29) of folding jaws (31; 32) of a folding-jaw system of a folding-jaw cylinder (27), a running roller (51) being guided on a control-cam path (52) of a control cam (84) in order to open and close the folding-jaw system, characterized in that the control-cam path (52) of the control cam (84) has, over its width (f), a slope in the axial direction of the folding-jaw cylinder, in that the control-cam path (52), as viewed in a cross section running through the axis of rotation (53) of the folding-jaw cylinder (27), is arranged at an angle to the axis of rotation (53) of the folding-jaw cylinder (27), and in the control cam (84) and the running roller (51) are arranged such that they can be displaced relative to each other in the axial direction (E) with respect to the folding-jaw cylinder (27).
2. Device according to Claim 1, characterized in that the control cam (84) is arranged such that it can be displaced in the axial direction (E) with respect to the folding-jaw cylinder (27).
3. Device according to Claim 1, characterized in that the control-cam path (52) has a width (f) which corresponds to many times the width of the running-roller track.
4. Device according to Claim 1, characterized in that the folding jaws (31; 32) are designed as prefold clamping elements (31; 32), in that the folding-jaw cylinder (27) is designed as a prefolding cylinder (27), and in that folding rolls (61; 62) for the final folding are arranged downstream of the prefolding cylinder (27).
5. Device according to Claim 1, characterized in that the control cam (84) is fixed to an axially displaceable, sleeve-like control cam carrier (86) which is secured against rotation and which bears an external thread (92), in that the external thread (92) is engaged with an internally threaded sleeve (94, 96) which can be rotated but is fixed in the axial direction (E), and in that the internally threaded sleeve (94, 96) is connected to a drive (101 to 104).
6. Device according to Claim 1, characterized in that the running roller (51) is arranged such that it can be displaced in the axial direction (E).
7. Device according to Claim 1, characterized in that the folding jaws (31; 32) of a pair are synchronized to each other for the purpose of opening and closing.
8. Device according to Claim 1, characterized in that the folding-jaw cylinder (27) is constructed in one piece.

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