DE1561030A1 - Multiple printing machine with printing units that can be connected and disconnected in series - Google Patents

Description

ΒΑΚ / Ζ

Applicant Officine Meccaniche Cigardi SA - OMCSA

Milan, Via E. Biondi I, Italy

Multiple printing machine with printing units that can be connected and disconnected in series

The invention "relates to multiple printing machines, especially for multi-color printing on sheets in which the paper sheets or the like. one after the other through each Printing units out and in successive printing processes can be printed.

The invention relates to a multiple printing machine with two or more printing units, each of which with the means and devices known per se, such as printing cylinders, transport and inking rollers, etc., for the actual printing process as well as for inserting and advancing the sheets between the Cylinders and rollers and for their transfer between the individual printing units. The individual D _r uekeinheiten are connected by a transmission to each other, which ensures their constant velocity and the phase matching, as it is required for multicolor printing. Such multiple printing machines belong to the known state of the art. In particular from the French patent specification 1,565,695 is known a printing press, which are mechanically Dridceinheiten a longitudinally epatraakende Transmisslonswelle each other * wbunderf, the ^ in as many sections' ■■

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is subdivided, how printing units are available, and those arranged between the individual shaft sections Has engaged and disengageable clutches. An independent electric motor is connected to each shaft section, so that the individual units are also independent after the shaft sections have been separated by the couplings can be driven from each other. In the French patent mentioned there are also embodiments of clutches and their actuation devices and of electrical circuits and circuits for automatic Control of certain work sequences of these clutches and actuators described and shown.

According to the invention are the individual printing units mechanically connected to each other by means of an intermediate gear, which are arranged between the gear sets belonging to the adjacent printing units. These Intermediate gears each consist of two identical coaxial ones Gears that are rotatably mounted with respect to each other, but can be connected to one another by means of a coupling, which can be carried out in an advantageous manner as in the above French patent described is controllable, so that each individual printing unit is affected by the resp. ' the neighboring printing units can be separated. With the gear set,

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one of the printing units, preferably the or a middle unit if the machine has three or more Having printing units, the main drive motor is the Machine connected, while the other printing units are connected to auxiliary motors that serve to these units when they are separated from the neighboring units. The auxiliary motors can optionally be used for Driving the entire machine contribute to some of the resistances opposed by the respective healers and thereby the intensity of the To reduce the stresses transmitted to the intermediate gear and the corresponding clutches.

The replacement of the transmission time described in the aforementioned French patent by a A series of gear drives allows, among other things, errors in the phase correspondence, i.e. in the current relative position between the rotating parts of the individual printing units, as much as possible to avoid. Such errors can be caused by torsional deformations of the transmission shaft especially when strong resistance changes between the individual pressure units appear. In addition, the space required by the machine is largely reduced and the transmission devices are simplified.

BATHROOM OBIGiMAL

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In the drawing showing an embodiment of the invention is:

1 shows a perspective and schematic view of a printing machine, for example with three printing units, according to the invention;

FIG. 2 shows a plan view of a drive formed exclusively from a series of gear wheels, and FIG

Fig. 3 is a plan view, partially in section and shown with some structural simplifications, one of the clutches that can be engaged and disengaged between the adjacent printing units.

As shown schematically in FIG. 1, "the multiple printing press consist for example of three printing units 10, 11 and 12 arranged in a row, each of which has the means and devices known per se, such as printing and inking rollers, devices for transport, gripping and transferring the sheet or the like. is provided. Each of the units can carry out all the pushing processes on its own, however, the individual units are usually set up so that each one prints in a different particular color. The printing cylinder and transport rollers are in a known manner driven by gears. With 13, 14 and 15 designated gears are the end gears of the individual units 10, 11 and 12 belonging gears. Intermediate gear 16 and are at opposite ends of the same gearbox between wheels 13 and 17 and 14 and 19 of the neighboring ones

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Units are arranged and have the task of providing the facilities for transferring the sheets from one unit to another to drive and at the same time ensure the mechanical connection between the individual discharges. The units 10, 11 and 12 are each connected to a motor 20 or 21 and 22, the associated units, for example via belt drives 23, 24 and 25 as well as with gears 13, 14 and 15 in Engaging stationary reduction gears 26, 27 and 28 antraben.

The motor 21 connected to the central unit 11 is the main motor of the machine, i.e. the motor de.r intended for it is to drive all units of the machine under regular operating conditions, while the motors 20 and 22 of the adjacent units are only used during the maintenance and installation work, the respectively assigned units drive alone. These motors 20 and 22 can therefore be very small and of a more economical design than the main motor 21, such as simple constant speed electric motors.

On the mechanical connecting means between the neighboring units, in the present example the gears 16 and 18, the engaging and disengageable clutches 30 and 31 shown schematically in Fig. 1 are arranged, which of Drive or actuation devices' 32 and 33 are controlled. By disengaging the clutches 30 and 31 can thus

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the mechanical connection between the units is interrupted.

The whole of the system of driving wheels is in Pig. 2, in which the cheeks of the printing units 10, 11 and 12 are labeled 10 ", 11" and 12 ".

The intermediate gears 16 and 18 shown in FIG. 1 consist of the same and coaxial gears 37, 38 and 39, 40, of which only one is connected to the shaft of the sheet transfer cylinder is connected between two adjacent printing units, while “the other is connected when the clutch is disengaged 30 or 31 can rotate freely. With 34, 35 and 36 the gears connected with the not shown pressure cylinders are fe3t designated.

Pig. 3 shows, in particular, the pair of gears 37, 38 with the associated clutch 30. This assembly corresponds to that of FIG the gear pair 39 »40 and the clutch 31 existing assembly.

How out of trouble. 3, the gearwheel 38 is firmly connected to the shaft 41 of the sheet transfer cylinder (not shown) arranged between the units 10 and 11. Be for this purpose, the gear 38 may be made of one piece with a sleeve 42 made _f the pushed onto the shaft 41 and is keyed. On the sleeve 42 is od with the interposition of a bearing bush 43, the like. the coaxial gear 37 is mounted, which is also

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if provided with a sleeve-like hub on which A ring 44 is mounted axially displaceably and has a circumferential groove 45 into which an adjusting fork 46 engages, which can be actuated by the actuating device 32 "which, for example, consists of a hydraulic or a pneumatic winch controlled in the manner described in the aforementioned French patent.

The ring 44 controls the axial displacement of an index pin 47, which can engage in a provided in the body of the gear 38 bore 40 to the two gears 37 and 38 to be coupled together. Thus the mechanical connection between the adjacent printing units only possible in a certain relative position of the two gears 37 and 38; i.e., when the two adjacent printing units 10 and 10 are in exact phase coincidence. The same goes for for the coupling between the adjacent units 11 and and optionally for further adjacent printing units of the Multiple printing machine.

For the gear transmission described above can Gears with the same number of teeth are used to between the rotating parts, in particular the printing cylinder and the inking, transport and transfer rollers, in a manner known per se Way to ensure a transmission of motion with a gear ratio of 1: 1. For coupling the units It is therefore not necessary to rely on preselection or phase adjustment devices to fall back on.

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Claims (5)

Claims 1. Multiple pressure machine with two or more in series Pressure units that are mechanically connected to one another by means of a gear, the one that can be engaged and disengaged Has couplings, and which are each provided with its own drive motor, characterized in that the adjacent Printing units (10, 11, 12) are connected to one another via intermediate gears (16, 18) between the drive wheels (13, 17 or 14, 19) for the cylinders and rollers of the neighboring ones Printing units are arranged so that an engageable and disengageable clutch (30 or 31) is provided for each intermediate gear is, whereby the connection of the intermediate gears can only take place when the adjacent printing units are in exact phase coincidence, and that a pressure unit (11) is connected to a main motor (21) which, during normal operation of the machine, controls all printing units of the same can drive, while the other or other printing units (10, 12) are connected to auxiliary motors (20, 22), of which these units are driven when they are used to carry out the maintenance and set-up work by the neighboring unit (s) Printing units are separated. 2. I-iehrfachdruckmaschine according to claim 1, characterized characterized in that it consists of three or more printing units and the main motor (21) with the or a middle 909887/0165 ORIGINAL BATHROOM Printing unit is connected. 3 * multiple printing machine according to claim 1 or Claims 1 and 2, characterized in that each the intermediate gear (16, 18) consists of two identical coaxial gears (37, 33 or 39, 4Ό), which with respect to each other are rotatably mounted and 'only in a certain relative rotational position by means of the associated coupling (30 or 31) can be connected to each other. 4. Multiple printing machine according to claims 1 to 3 » characterized in that one of the intermediate gears (e.g. 38) with the shaft (41) of a known transfer roller for the transfer of the sheets to be printed is connected between adjacent printing units. 5. Multiple printing machine according to claims 1 to 3 and optionally according to claim 4, characterized in that that the couplings (30, 31) have an index pin (47), a
which is slidably guided in the / intermediate gear wheel (37) and can engage in a bore (48) provided in the body of the other intermediate gear wheel (38). BATH 909887/0165 -AO- Blank page