EP0153620B1 - Device for exchanging the numbering device in a printing machine - Google Patents

Abstract

A device for exchanging a numbering and imprinting device having a numbering shaft for carrying numbering units thereon and provided with an associated inking unit in a printing press, for another numbering and imprinting device mounted on another numbering shaft, the exchanging device includes a swivelling device swivellable about a horizontal pivot axis extending parallel to the axis of the numbering shaft, the swivelling device being formed of gripper elements, arranged on a cross member and carrying respective left-hand and right-hand journal pins of the numbering shaft, the horizontal pivot axis being formed by the axis of the cross-member, and the cross-member being mounted longitudinally displaceably on a carriage guide secured to a machine frame located at an end of the printing press, the carriage guide extending parallel to the axis of the numbering shaft.

Description

The invention relates to a device for exchanging a numbering and imprinting device provided with a numbering shaft for receiving numerals with an assigned inking unit in printing presses for another numbering and imprinting device mounted on another numbering shaft by means of an axis of rotation running parallel to the numbering shaft axis pivotable swivel device

DE-A-19 22 274 and DE-U-82 33 832 should first be mentioned as prior art, but they do not relate to numbering and impression devices. There, additional devices such as cylinder transport wagons or cranes are required to replace cylinders.

It is now known to equip sheetfed offset printing machines in a special version with a numbering station, so that the machine can be used not only for printing but also for combined printing and numbering jobs. Such a numbering station consists of a numbering shaft with seat rings which can be coupled to the drive of the machine and on which one or more numbering units can be mounted depending on the print job. The numbers of the numbering units are colored by a numbering inking unit assigned to them, while the number advance takes place via switching curves.

The numbering shaft is usually equipped with the individual numbering units outside the machine. The entire numbering station must therefore be removed from the machine, or the numbering shaft is re-equipped or preset in the machine, which usually means a longer machine downtime. For better handling, the numbering shaft and numbering inking unit can therefore usually be removed from the machine separately from one another (DE-C-22 21 343).

For various numbering orders, such as printing checks, for which special check printing machines are usually used, the machine's printing unit can be used to print personal data, such as names, addresses, etc., into the check forms, while the changing numbering of the checks can be applied using the downstream numbering unit . Since check prints are often only required in very small print runs, it is necessary to constantly change the numbering data within shorter periods. In order to avoid the resulting longer machine downtimes, the check printer usually works with two numbering shafts, one of which is in the press when the print run is carried out, while the second shaft is meanwhile preset for the next job outside the press.

Special check printing machines are known in which the numbering station already consists of two numbering shafts which are alternately in the working position in the machine or in the presetting position in front of the machine.

In one application, the two shafts are each supported with a journal on a common support arm, the support of this support arm being fixed to the machine frame in the middle thereof on a horizontal bearing axis which can be rotated on at least one side wall of the machine and can be pulled out of it to a certain extent is. To change the numbering shaft, the two shafts are pulled together laterally out of the machine frame and, rotated through 180 °, reinstalled (US Pat. No. 3,728,960). A comparable procedure can also be found in machine tool construction for changing the tools with their holders.

Another known type of application is the swiveling out of a double-shaft bearing, which accommodates both numbering units, out of the machine about a horizontal axis, the double-shaft bearing for the two numbering shafts likewise also being rotated through 180 ° and swung back into the machine. For this purpose, a pivoting device (DE-A-32 46511) can be pivoted about an axis of rotation running parallel to the numbering shaft axis.

Both of the above Design variants have the serious disadvantage that the presetting position of the second numbering shaft is extremely unfavorable, because from this frontal point of the machine the machine operator also z. B. must work on the main printing unit or other units located in this front area of the machine and also the printed sheets must be observed when laying out on the delivery stack.

Proceeding from this, it is the object of the present invention to provide a device for exchanging numbering and indenting devices, in which the second numbering shaft intended for presetting is located at a suitable presetting location outside the operating and observation area of the machine units.

The object is achieved according to the invention by a device according to the characterizing part of claim 1. Further advantages and design variants result from the subclaims and the description of the figures. In particular, the following advantages are worth mentioning:

With the help of the device shown is now omitted entirely the need for one or more machine operators to have to take the quite heavy numbering and imprinting device out of the machine and carry it away by hand to equip it with new numerals. There is also no need to use additional devices such as cylinder transport trolleys or transport cranes. The replaced numbering and imprinting device is now placed so that the machine operator can access the front area of the machine at any time without hindrance.

The device according to the invention is shown in the drawings using exemplary embodiments,

• Fig. 1 eine Einfarben-Bogenrotationsdruckmaschine mit der erfindungsgemäßen Vorrichtung zum Numerierwellenwechsel,
• Fig. 2 eine Seitenansicht der Vorrichtung nach Fig. 1,
• Fig. 3 eine vergrößerte Darstellung des vorderen Bereiches eines Schwenkhebels,
• Fig. 4 die Lagerung der Numerierwelle in der Maschinenseitenwand,
• Fig. 5 eine Schwenkvorrichtung mit zweigeteiltem Schwenkhebel,
• Fig. 6 eine Seitenansicht der Schwenkvorrichtung nach Figur 5 und
• Fig. 7 eine Schwenkvorrichtung mit zweigeteiltem durch eine Gasdruckfeder unterstütztem Schwenkhebel.

shows:

• 1 is a single-color sheet-fed rotary printing press with the device for changing the numbering shaft,
• 2 is a side view of the device of FIG. 1,
• 3 is an enlarged view of the front area of a pivot lever,
• 4 the bearing of the numbering shaft in the machine side wall,
• 5 shows a swivel device with a two-part swivel lever,
• Fig. 6 is a side view of the swivel device according to Figure 5 and
• Fig. 7 shows a pivoting device with two-part pivot lever supported by a gas pressure spring.

FIG. 1 shows a single-color sheet-fed rotary printing press 1 in a schematic representation with a built-in numbering and imprinting device 2. The sheet 4, which is separated from the stack 3, is fed into the gap between the blanket cylinder 5 and the impression cylinder 6 via a feed device, not shown, where the printed image is printed . The printing cylinder is transferred to the blanket cylinder 5 from a plate cylinder 7 to which a dampening unit 8 and an inking unit 9 are assigned.

After the print image has been transferred to the paper sheet 4, the corresponding printing is carried out in the downstream numbering and printing device 2. The numbering; and impression device 2 is assigned a separate inking unit 10.

The printed sheet 4 is conveyed further by the gripper device, not shown, of the impression cylinder 6 and fed to a gripper device 11 which takes over the sheet 4, the paper sheet 4 being fed to a delivery stack 14 via a delivery chain 13 equipped with this gripper device 11.

The inking unit 10, which is assigned to the numbering and impression device 2, can be coupled to a swivel mechanism 15 which consists of two swivel arms 16, 17 which are connected to one another in an articulated manner and in pairs (see FIG. 2), with the aid of which the inking unit 10 in two storage positions 18, 19 can be transported to thereby the machine operator z. B. to provide unimpeded access to the printing unit 5, 6 of the machine. The possible storage positions 18, 19 are shown in dashed lines.

The swiveling device 20 for exchanging the numbering and indenting device 2 consists of two L-shaped angled lever arms 21, 22 provided with handles 39, each of which has a fork-shaped opening 23 in its front area for receiving axles 24 on both sides of the numbering shaft 35 of the numbering and have imprinting device 2. The lever arms 21, 22 are attached to a tubular cross member 27 with the interposition of a web 25 and another arm 26. This tubular traverse 27 is guided on a corresponding shaft-like slide guide 28, which also runs parallel to the numbering shaft axis 70, the latter being mounted on bearing stands 30 of a base plate 31 arranged at the ends.

The base plate 31 is fastened to the boom-side machine frame 34 in a manner not shown in more detail by means of fastening means 29. Stops 32, 33, which are attached to the tubular cross member 27 or on the lever arm 22 and abut against the base plate 31 or the front machine frame 34 of the machine, limit the swivel range of the swivel device 20.

As shown in particular in FIG. 2, the slide guide 28 or the base plate 31 fastened to the front machine frame 34 is dimensioned in such a length that there is space for three swivel devices 20 each provided with numbering and impression devices 2. In fact, however, only two swivel devices 20 are arranged thereon, the z. B. may have a mirror-image design.

The procedure for loading or exchanging the numbering and impression devices 2 is as follows:

The numbering and impression device 2, which is located in the area of the left side wall 37 outside the printing press 1 and is mounted on the swivel device 20, is ready for preparation for the following print job. When the job of the numbering and impression device 2 located in the printing press 1 has ended, it is swiveled out of its working area with the swivel device 20 and moved to the right into the presetting position assigned to the right side wall 38 (shown in broken lines in FIG. 2). The already prepared numbering and impression device 2 can now be installed directly using the swivel device 20 guided on the slide guide 28 so that the new print job can run. The numbering and impression device 2, which is now located in the area of the right side wall 38, can then be prepared for the next print job without delay.

Before carrying out the above-mentioned work steps, the assigned inking unit 10 must always be moved into one of the storage positions 18, 19 by the machine operator by means of the swivel mechanism 15.

The pivoting device 20 or its lever arms 21, 22 remain in the pivoted-in state during the machine run. Their fork-shaped openings 23, which are made in one piece or in the embodiment according to FIG. 3, have no contact with the axle journals 24 of the numbering shaft 35 during machine operation.

For this purpose, the inner radius of these fork-shaped openings 23 is dimensioned such that even in the various eccentric positions "pressure on" and "pressure off" there is no contact with the correspondingly mounted numbering shaft 35.

As mentioned above, the fork-shaped openings 23 of the lever arms 21, 22 arranged in pairs can also be designed in such a way that they surround the axle journals 24 of the numbering shaft 35 in the presetting position and when swiveling and guiding in the slide guide 28 (see FIG. 3) , so that the numbering shaft 35 and thus the entire numbering and imprinting device 2 cannot rotate automatically (for example due to a momentary imbalance during assembly).

Shortly before the end position in the printing press 1 is reached, a gripper arm 41, which is rotatably mounted in a fulcrum 42 of each lever arm 21, 22, opens by running a roller lever 43 with cam roller 85 connected thereto on an opening cam 45 fastened to the machine frame 34 by means of fastening screws 44 .

The pliers formed by gripping arm 41 and the front end 46 of each lever arm 21, 22, which in addition to the shape of the pliers, thereby comprises in the final working position the journal 24 of the numbering shaft 35 again at such a distance that there is no longer any contact, not even in the various already mentioned Eccentric positions "pressure on" and "pressure off" of the correspondingly mounted numbering shaft 35. The collet force results from a compression spring 47, which is guided in a bore 48 of the lever arms 21, 22, and presses against a lower stop 49 of the gripping arm 41.

In principle, it is possible to temporarily override the collet force, for example, by means of a cam piece operated by means of a hand lever, but not shown, even during the preset position of the numbering and impression device 2 outside the machine, in order to thereby enable the numbering shaft 35 to be rotated to be equipped with numerals.

FIG. 4 now shows the mounting of the axle journals 24 of the numbering shaft 35 in the printing press 1. For this purpose, half-shells 51 which are pivotably attached to the side walls 37, 38 and into which the axle journals 24 are inserted are provided. These each have a flattened area 52 and a bore 53 in the area of their storage. A clamping jaw 54 closes off the half-shell 51 in such a way that a clamping screw 56 is guided through a bore 55 of the clamping jaw 54 and through the corresponding bore 53 of the journal 24 and is screwed into a thread 57 introduced in the lower region of the half-shell 51. As an alternative fastening option, a bayonet lock would also be conceivable, for example. A washer 58 and a compression spring 59 resting thereon and on an extension 50 of the clamping jaw 54 serve to correspondingly support the clamping screw 56 forming a unit with the clamping jaw 54.

The half-shell 51 assigned to the side wall 37 of the machine 1 on the drive side is connected via a corresponding drive connecting element 69 to a toothed wheel of the drive chain, not shown here, and thus transmits the drive to the numbering shaft 35.

Figure 5 now shows a further embodiment of the swivel device 60. It is designed such that after the numbering and impression device 2 has been brought into its working position in the printing machine 1 and locked in the half-shell bearing, the swivel device 60 is released again the machine can be swung out.

For this purpose, levers consisting of two limbs 61, 62, which are connected to one another in an articulated manner, are again provided in pairs, ie for each journal 24 of the numbering shaft 35. Each lower leg 62 is connected to a tubular cross member 63 which is guided in the slide guide 28 in accordance with the embodiment according to FIG. 1. Slideways 64 arranged in the tubular traverse 63 ensure precise guidance. The two legs 61, 62 are rotatably connected to one another by the axis 65 at the pivot point 66. In its lower area, each leg 61 has a further bearing point 67 for a further axis 68. Due to a link guide 71 in this area of each lower leg 62, both can be pivoted relative to each other by a certain amount. As a result, the fork-shaped opening 23 of the upper leg 61, which can be formed in one or two parts according to FIG. 4, can be moved downward out of the numbering shaft area and then the entire area Swivel device 60, as indicated by dashed lines, can be pivoted outwards.

In the movement phase loaded by the suspended numbering and impression device 2, both legs 61, 62 are connected to one another in a rotationally fixed manner by index sleeves 72 according to FIG. The index sleeves 72, which are movable in the longitudinal direction on the axis 68, snap resiliently into index bores 73 of each lower leg 62. The stops 68 are supported by stops 74, each fastened on the axis 68, on which pressure springs 75 are supported.

The index sleeves 72 are designed as handles so that they can be moved by the machine operator with both hands in the axial direction of the axis 68 and can also be used to execute the rotating and pivoting movements of the pivoting device 60.

To replace the numbering and impression device 2, it is also necessary here to bring the assigned inking unit 10 into one of the storage positions 18, 19 already designated in FIG. 1 by means of the pivot mechanism 15.

FIG. 7 shows a last variant of the swivel device 76, with which the numbering and impression device 2 can also be exchanged without swiveling the inking unit 10 away.

The embodiment corresponds essentially to that according to FIGS. 5 and 6. Only the front extension 77 of the lower leg 78 is somewhat lengthened so that the pivot 79 with the upper leg 80, which is provided with a one-piece or two-piece fork-shaped opening 23, for the desired purpose creates more favorable lever arm ratios. The link guide 81 is also slightly extended, thereby increasing the swivel range between the two legs 78, 80.

In the exemplary embodiment shown, a gas pressure spring 84 is arranged at the articulation points 82, 83, of the legs 78, 80. This serves to support the swivel movement carried out manually by the machine operator via the index sleeves 72.

This makes it possible to bring the numbering and impression device 2 out of the printing press 1, for example in accordance with the curve 86 indicated by dash-dotted lines in FIG. The inking unit 10 is not in the way.

With the aid of the swivel mechanism 15, the inking unit 10 then only has to be brought into one of the storage positions 18, 19 already shown, if unimpeded access, for example to the printing unit 5, 6 of the printing press 1, requires this for the purpose of setting or assembly work.

The half-shell mounting according to FIG. 4 is not shown in FIGS. 5 and 7 for the sake of clarity. 3, the arrangement of the opening curve 45 must be adapted to the movement conditions of the swivel devices 60, 76 (FIG. 5, 7). A possibility that is not further elaborated in the figures would, for example, also be to use the swiveling device 76 for the numbering and impression device 2 also for moving (swiveling) the inking unit 10 assigned to it, in order to do this, like the numbering and impression device 2 from the printing press 1 to get out and to store it while carrying out the above-mentioned setting or assembly work on a swivel device 76 laterally displaced via the slide guide 28. The pivot mechanism 15 could be omitted.

Parts list

• 1 single color sheet-fed rotary press
• 2 numbering and printing device
• 3 piles
• 4 sheets
• 5 rubber cylinders
• 6 impression cylinders
• 7 plate cylinders
• 8 dampening system
• 9 inking unit
• 10 inking unit
• 11 gripper device
• 12
• 13 delivery chain
• 14 delivery stacks
• 15 swivel mechanism
• 16 swivel arm
• 17 swivel arm
• 18 storage position
• 19 storage position
• 20 swivel device
• 21 lever arm
• 22 lever arm
• 23 fork-shaped opening
• 24 journals
• 25 bridge
• 26 arm
• 27 tubular traverse
• 28 slide guide
• 29 fasteners
• 30 storage racks
• 31 base plate
• 32 stop
• 33 stop
• 34 machine frame
• 35 numbering wave
• 36
• 37 left side wall
• 38 right side wall
• 39 handle
• 40
• 41 gripper arm
• 42 pivot point
• 43 roller lever
• 44 fastening screw
• 45 opening curve
• 46 front end
• 47 compression spring
• 48 hole
• 49 stop
• 50 approach
• 51 half-shell
• 52 flattening
• 53 hole
• 54 jaw
• 55 hole
• 56 clamping screw
• 57 threads
• 58 washer
• 59 compression spring
• 60 swivel device
• 61 upper leg
• 62 lower leg
• 63 tubular traverse
• 64 Slideway
• 65 axis
• 66 pivot point
• 67 bearing point
• 68 axis
• 69 connecting element
• 70 numbering shaft axis
• 71 Scenic tour
• 72 index sleeves
• 73 index hole
• 74 stop
• 75 compression spring
• 76 swivel device
• 77 front approach
• 78 lower leg
• 79 pivot point
• 80 upper leg
• 81 guided tour
• 82 pivot point
• 83 pivot point
• 84 gas spring
• 85 Cam roller
• 86 curve

Claims (16)

1. Device for exchanging a numbering and impression device provided with a numbering shaft for mounting digit units with related inking unit in printing machines for another numbering and impression device mounted on a further numbering shaft by means of a swivel device which swivels around a horizontal pivot axis running parallel to the numbering shaft axle,
characterised by the fact
that both of the interchanged numbering and impression devices (2) are each assigned a swivel device (20, 60, 76) which is mounted on a slide frame (34) of the printing machine (1) and can be moved lengthwise on slide (28), whereby the latter has a length which is dimensioned for simultaneously accomodating three swivel devices (20, 60, 76).

2. Device according to Claim 1
characterised by the fact
that the swivel device (20, 60, 76) is designed as gripper elements (21, 22, 61, 62, 78, 80) attached to a crossbar (27, 63) and accomodating the left and right axle journals (24) of the numbering shaft (35), with the crossbar (27, 63) forming the pivot axis are mounted on the slide (28) running parallel to the numbering axle shaft (70) and can be moved lengthwise along this slide (28).

3. Device according to Claim 1
characterised by the fact
that the inking unit (10) for the numbering and impression device (2) is assigned to a swivel mechanism (15), which essentially consists of swivel arms (16, 17) which are linked to each other by an articulated joint and which pivot in the upper area of the side walls of the machine (37, 38), with the aid of which the inking unit (10) can be transported as desired into two delivery positions (18, 19).

4. Device according to Claim 1
characterised by the fact
that the slide (28) supporting the swivel device (20, 60, 76) is attached to the machine frame (34) at the face end allocated to the sheet delivery of a sheet-fed offset printing machine which can be equipped with numbering and impression devices (2).

5. Device according to Claim 2
characterised by the fact
that the crossbar (27, 63) is designed in a tubular shape and runs on the corresponding, shaftlike slide (28), the latter being mounted on beraing pedestals (30) positioned at the ends of a base plate (31) attached to a machine frame (34) at the delivery end of a printing machine (1).

6. Device according to Claim 5
characterised by the fact
that stops (32, 33) are provided on the swivel device (20, 60, 76) and strike against the base plate (31) and the machine frame (34) of the printing machine (1) at the delivery end in order to limit the swivel range.

7. Device according to Claim 2
characterised by the fact
that for mounting the axle journals (24) of the numbering shaft (35) in the side walls (37, 38) of the printing machine (1), half shells (51) are provided which either are fixed to the machine drive or pivot freely, and which accomodate the axle journals (24) of the numbering shafts (35) in interaction with the clamping jaws (54) and also the clamping bolts (56) which mesh into the half shells (51).

8. Device according to one or several of Claims 1-7
characterised by the fact
that the gripper elements of the swivel device (20) are designed as L-shaped, angled lever arms (21, 22) provided with handles (39), each of the lever arms (21, 22) having at its front end a fork-shaped opening (23) for mounting the axle journals (24) on both sides of the numbering shaft (35), the lever arms (21, 22) being attached to the crossbar (27) by means of an intermediate web (25) and also a further arm (26).

9. Device according to one or several of Claims 1-7
characterised by the fact
that each gripper element of the swivel device (60) is designed as two legs (61, 62) linked to each other by an articulated joint and which are connected to each other in a rotary movement by an axle (65) in a pivot point (66), with one of the legs (61) having a fork-shaped opening (23) for mounting the axle journals (24) on both sides and a further bearing point (67) for a further axle (68), while the other leg (62) has a link guide (71) assigned to this pivot axle (68).

10. Device according to Claim 9
characterised by the fact
that indexing collars (72) are provided which can move lengthwise along the axle (68) and which are supported by stops (74) and pressure springs (75), and which engage into indexing holes (73) of the one leg (62) in the end position of the swivel movement of both legs (61, 62).

11. Device according to Claim 10
characterised by tbe fact
that the indexing collars (72) are designed as handles.

12. Device according to Claim 9
characterised by the fact
that at pivot points (82, 83) the leg (78, 80) of the swivel device (76) makes contact with a spring element (84) while the relative swivel angle between two legs (78, 80) can be varied over a wide range by means of an appropriately dimensioned link guide (81).

13. Device according to Claim 9
characterised by the fact
that the swivel device (76) can be used for moving the numbering and impression device (2) and the inking unit (10) assigned to the latter.

14 .Device according to Claim 8, 9 or 12
characterised by the fact
that the front area of the gripper elements (21, 22, 61, 80) forming the fork-shaped opening (23) is designed as a two-section piece, with a gripper arm (41) pivot mounted in a pivot point (42) of each gripper element (21, 22, 61, 80) being supported at a pressure spring (47), that additionally a roller lever (43) is provided at the pivot point (42) with a torsionally rigid link to the gripper arm (41), the cam roller (85) of said roller lever (43) running on an opening cam (45) positioned-on the machine frame (34) in the area of the numbering shaft mounting.

15. Device according to one of the Claims 8, 9 or 12
characterised by the fact
the front area of the gripper elements (21, 22, 61, 80) forming the fork-shaped opening (23) is designed as a single-section piece.

16. Device according to Claim 14 or 15
characterised by the fact
that the fork-shaped opening (23) is so dimensioned that no contact exists with the rotating numbering shaft (35) during the printing process neither when the latter is in the "cylinder down" nor in the "cylinder up" position.

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