DE1875130U - DEVICE FOR PRINTING ON AND OFF OF ROTARY PRINTING MACHINES. - Google Patents

Description

P.A.2B1

Maschinenfabrik Augsburg-Nürnberg AG., Augsburg

Stadtbachstrasse 7

Gm.B. 874

Device for printing on and off on rotary printing machines

The innovation relates to a device for printing on and off on sheet-fed printing machines, in which the cylinder is switched on and off by means of an eccentric bearing, for example acting linkage triggered by counter-rotating pawls which are optionally engageable with a cam-controlled pair of levers.

There are different versions of pressure setting and setting devices known, in which the adjustment of the cylinder by turning its eccentric bearing bushes by means of cam-controlled Lever is effected. In one of these versions, these levers are parallel to each other and are constantly controlled by the control cams actuated. The mechanical connection of these levers with the linkage for bearing rotation takes place via two pivotable levers in opposite directions Pawls, each at the point in time at which the pressure is to be switched on or off, with the pressure on or off lever be engaged.

The pawls are pivoted mechanically via a linkage, which is operated by a hand lever. For machines in series construction, in which several printing units are arranged one behind the other are, the pawls of all printing shutdowns are connected by such rods, with between the individual printing units Mechanical delay switchgear must be arranged in order to switch the printing on and off of the individual printing units in a timely manner with the passage of the printed sheet through the machine. However, the structural effort for this is very great, as there is a large number of levers, tie rods and curves, all of which are in the

Oil bath of the gear boxes must be arranged. Also be Electric arc controls are becoming more and more common in modern machines used, whereby the electrical impulse that occurs in the event of a faulty system is initially converted back into the mechanical rod movement must become.

In contrast, in a device for printing on and off proposed according to the innovation to directly couple an oil-proof rotary magnet with the pivot axis of the pawls. By this measure becomes the necessary pivoting movement when the buttons are operated without the interposition of any linkage parts the pawls and, for example, the electrical impulse of the electrical arc controls of the system directly to the switching of the Rotary solenoids used.

In the drawing, an embodiment of the innovation is shown. Show it

Fig. 1 is a view,

Fig. 2 shows a cross section through a storage device.

The pressure adjusting lever 1 and the pressure adjusting lever 2 are constantly moved in a known manner via the curves 3. The linkage M- for cylinder adjustment, for example leading to an eccentric bushing of the bearing, is articulated to a lever 5 which is pivotably mounted in the pivot point 6. The two pawls 7 and 8 are mounted pivotably about the axis 9 on the lever 5. A rotary magnet 10 is connected to the axle 9 by a clutch 11 and pulls the pawls when the power is switched on. B. to the left, wherein the pawl 7 reaches the pivoting range of the lever 1, whereby the lever 5 and the associated linkage 4 is pivoted in the print-on position. When the current for the rotary magnet is interrupted, a tension spring 12 pulls the pawls and the rotary magnet to the right, so that the pawl 8 moves into the pivoting range of the lever 2. The lever 5 and the linkage 4- are thereby pivoted back into the print-off position.

In the event of a power failure for any reason during operation the machine adjusts the pressure itself by pulling the spring 12

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active from, and the disadvantageous stoppage of the machine under compressive stress is thus avoided.

The use of a rotary magnet to control the pawl stop is not limited to the above embodiment, but can also be used in a similar form for reciprocal drive a pawl pivoting movement.

Claims (2)

Protection claims: 1. Device for printing on and off on sheet-fed printing machines, in which the turning on and off of the cylinder by means of, for example, an eccentric bearing Linkage is triggered by counter-rotating pawls, which optionally with a cam-controlled pair of levers can be brought into engagement, characterized in that the mutual pivoting of the pawls in the working position in one direction of rotation by a rotary magnet connected to the pawl axis and in the other direction of rotation takes place by a spring articulated on the ratchet axle. 2. ratchet drive according to claim 1, characterized in that the Rotary solenoid when the power is switched on, the push-on pawl and when the power is switched off, the push-down pawl in the operative position brings. 3 · ratchet drive according to claim 1, characterized in that the Rotary magnet ÖÜfest formed and in the oil bath of the gear case is arranged.