EP0639457B1 - Device for holding switchable perforating tools - Google Patents

Abstract

The invention relates to a device for holding perforating tools with respect to a sheet-guiding cylinder of a rotary printing machine, a carrier body being supported axially displaceably on a shaft penetrating an axially parallel carrier body bore. The carrier body is provided with clamping means for its clamping with respect to the shaft and with actuating means. By means of the latter, the mutual clamping of shaft and carrier body can be produced or released. As actuating means, rotatably supported rings are provided, a shaft (1) which penetrates a carrier body (6), which holds an eccentric ring (13) with perforating tool (19, 20), functioning as its supporting and switching shaft. <IMAGE>

Description

The invention relates to a device for receiving perforating tools in relation to a sheet-guiding cylinder of a rotary printing press, a support body being axially displaceably mounted on a shaft passing through an axially parallel support body bore, the support body being provided with clamping means for its jamming relative to the shaft and with actuating means the mutual jamming of the shaft and the support body can be produced or released and are designed as actuating means of rotatably mounted rings.

DE-OS 1 561 176 discloses a perforating device in which the die carrier and counter wheel are accommodated in displaceable housings. The housing can be moved transversely to the material web via sliding spindles that can be operated with handwheels. With this device, primarily material webs can be perforated; it is unsuitable for sheet processing because it takes up too much space.

DE 22 35 511 C3 discloses a device for punching rows of holes in endless paper webs on a rotary printing press. Upper tools received on a stationary shaft perforate a paper web passing through them and the retractable and extendable pins of these upper tools can be reworked using a grinding device. The individual upper tools can be fixed in their working position on the stationary shaft using screws.

From DE 29 12 458 C2, a rotary punch with a counter roll supported against the knife roll has become known.

Knife roller and counter roller are accommodated in bearings arranged opposite one another, between which there is a body whose thickness can be adjusted. With this solution, the contact forces and thus the wear of cutting tools can be influenced.

DE 40 21 470 A1 discloses a clamping device for the supporting body of a cutting roller with respect to a shaft in a cutting device for longitudinally cutting material webs. In this device, a clamping means, which runs with one end in a curved path of an adjusting ring, with the other end on which dovetail-like, wedge-shaped clamping surfaces are formed, is guided in clamping body halves on the shaft. This solution is complex in terms of production technology and therefore cost-intensive. It places high demands on compliance with the tolerance ranges during production and requires a high degree of fit between the components.

DE 10 19 321 discloses a perforating unit with pins or holes arranged on rollers. Two perforating bodies working in contact with one another are provided with pins or holes which are attached to perforating belts. These are placed around the rollers and fastened to each other in an exact setting.

Starting from the prior art shown, the invention is based on the object, using a small number of components, to arrange perforating tools in a space-saving manner opposite a sheet-guiding cylinder.

According to the invention the object is solved by the features of claim 1.

An advantage that can be achieved with the solution according to the invention is that now numbering units and perforating tools can be adjusted independently of one another. The perforating tools can be adapted to any perforation format on their bearing shaft. Accordingly, the free spaces between the numbering units can be used almost optimally. Now perforation and numbering impressions can even applied to the substrate at the same positions. Since there is hardly any play between the eccentric ring and the supporting body, the eccentric movement enables the perforating tools to be positioned very precisely on the surface of a sheet-guiding cylinder and thus on the printing material. The arrangement of the perforating wheels directly opposite the sheet-guiding cylinder makes it possible to dispense with a lever bearing which would be elastically deformable.

In further refinements of the idea on which the invention is based, perforated rings are arranged on the eccentric ring on roller bearings, which has the advantageous property of reducing the play of the overall arrangement of support body, eccentric ring, roller bearing, perforated ring to a minimum.

In addition to the use of perforating rings, the outer ring of a rolling bearing accommodated on the eccentric ring can be designed as a perforating tool according to a further configuration option according to the invention.

Furthermore, the eccentric ring is provided with both a first stop and a second stop and is arranged with an eccentricity with respect to the bearing shaft. This allows the travel range to be kept very small. A stop is also formed on the support body. In addition, a clamping screw is provided on this, with which the support body can be fixed in its respective axial position on the bearing shaft. This means that adjustments to the perforation positions can be made quickly.

Between a stop of the eccentric ring and that of the support body, a compression spring is provided, with which the support body and compression spring can be braced against one another in order to eliminate play and the support body and eccentric ring to be able to adjust radially against each other. The radial adjustment of the support body and eccentric ring takes place via an adjusting means, which is embedded in the support body and acts on the second stop of the eccentric ring. The twisting of the adjustment means brings about a radial adjustment of the eccentric ring and support body against each other against the compression spring preload.

The invention is explained in detail below with reference to a drawing:

Fig. 1:

einen Längsschnitt durch einen Tragkörper, einen Exzenterring samt Wälzlager mit Perforierkranz;

Fig. 2:

einen Querschnitt durch die einem bogenführenden Zylinder gegenüberliegend angeordnete erfindungsgemäße Vorrichtung;

Fig. 3:

eine Seitenansicht der räumlichen Anordnung vom Perforierwerkzeug, Numerierwerkshüllkurve und papierführendem Zylinder.

It shows:

Fig. 1:

a longitudinal section through a support body, an eccentric ring including roller bearings with a perforated ring;

Fig. 2:

a cross section through the device according to the invention arranged opposite a sheet-guiding cylinder;

Fig. 3:

a side view of the spatial arrangement of the perforating tool, numbering envelope and paper-guiding cylinder.

1 shows a longitudinal section through a device according to the invention.

A support body 6 is received on a bearing and control shaft 1, which has a receiving bore 8 in an upper stop 7 and provides a threaded section 9 in its lower half. There is an eccentric ring 13 on the support body 6, on which a roller bearing 19 is received. The roller bearing 19 and the eccentric ring 13 are axially fixed on the support body 6 via a locking ring 21 which rests on a disk. On the roller bearing 19 is a perforating ring 20, which in the middle has an annular web that acts on the printing material and creates the perforation on the printing material. There is also the possibility of also designing the outer ring of the roller bearing 19 as a perforating tool provided with a circumferential web, and there is also the possibility of also designing the inner ring of the roller bearing 19 as an eccentric ring 13.

Fig. 2 shows a cross section through the support body, eccentric ring, bearing and selector shaft, as well as roller bearings and perforating ring.

On a bearing shaft 1, which also serves as a control shaft, a continuous axial groove 2 is provided, which is radially delimited by a stop surface 3 and a stop surface 4. A projection 18, which is formed on the inner wall of the support body 6, engages in the axial groove 2. The supporting body 6 can be fixed in position on the bearing and selector shaft 1 by a clamping screw 5. A loosening of the clamping screw 5 allows an axial displacement of the support body 6 in any position on the bearing and switching shaft 1, and thus the creation of a perforation regardless of numbering mechanism impressions. The eccentric ring 13, which has two stops 15 and 16, is located on the support body 6. Relative to the center of the bearing and selector shaft 1, this is arranged with an eccentricity 14 to the bearing and selector shaft 1.

Between the stop 7 and the receiving bore 8 provided therein and the first stop 15 of the eccentric ring 13, a compression spring 10 is received, which braces the support body 6 and eccentric body 13 against each other. Fine adjustments are possible via an adjusting means 11, which is received by the threaded section 9 in the support body 6 and on the second stop 16 of the Eccentric ring 13 acts. A relative rotation of the eccentric ring 13, which receives the roller bearing 19 together with the perforated ring 20, is possible with respect to the support body 6, which is fixed on the bearing and selector shaft 1. Thus, the thickness of the perforation can be easily adapted to the printing material guided on the circumference of the sheet-guiding cylinder 22 and, if necessary, can be easily adjusted during machine operation.

In operation, the perforating rings 20 are turned on the surface of the sheet-guiding cylinder 22 by turning the bearing and switching shaft 1 clockwise - corresponding to the lower half of the double arrow. The clamping screw 5 fixes the support body 6 in a certain axial position on the bearing and shift shaft 1. During the rotation of the bearing and shift shaft 1, the eccentricity 14 brings the perforated ring 20 received on the eccentric ring 13 by the roller bearing 19 to the surface of the sheet-guiding cylinder 22. Via the adjusting means 11, which is prestressed by a spring 12, a fine adjustment of the perforation depth in the engaged state is possible. This depends primarily on the substrate to be processed.

A rotary movement of the bearing and switching shaft 1 in the opposite direction - corresponding to the upper arrow of the double arrow - causes the perforating tool to be set down from the surface of the sheet-guiding cylinder 22. In the state shown in FIG. 2, the perforating tools 20 can be moved by switching the bearing and switching shaft 1 be turned clockwise on the paper-guiding cylinder 22. A scaling can also be provided on the adjusting member 11, on which the perforation depths can be read, in order to ensure easier reproducibility of settings once made.

If several perforating tools - be it outer rings of roller bearings or perforating rings - are accommodated on the bearing and selector shaft 1, it is possible to switch off the perforating tools from the substrate that are not required for a print job. For this purpose, the clamping screw 5 jamming the support body 6 with the bearing and switching shaft 1 is loosened. Then the support body 6 is rotated counterclockwise on the bearing and shift shaft 1 until the projection 18 abuts the stop surface 4 of the axial groove 2. Then the clamping screw 5 is tightened again. This is the procedure to be followed for all those perforating tools which should not come into contact with the printing substrate when an order is made when the bearing and switching shaft 1 move.

In contrast, the perforating tools, which act on the printing material, are to be fixed on the bearing and selector shaft 1 in such a way that the projection 18 of the supporting body 6 bears against the stop surface 3 of the axial groove 2. With a switching movement of the bearing and switching shaft 1 in a clockwise direction, the printing material is perforated by the perforating tools, whose support body projections 18 rest against the stop surface 3, while the perforating tools, whose support body projections 18 rest against the stop surface 4, as far as are reset from the printing material, that they do not come into contact with the printing material during a switching movement of the bearing and switching shaft 1 on the sheet-guiding cylinder 22.

After tightening the clamping screw 5 in the engaged position - that is, contact of the lower edge of the projection 18 with the stop surface 3 of the bearing and selector shaft 1 - a fine adjustment can be made between the support body 6 and the eccentric ring 13 to the perforation depth if necessary adapt. The manual on and off - limited by the radial expansion of the axial groove 2 in the bearing and switching shaft 1 - enables the printer to switch off the perforating tools that are not currently required from the printing material on the sheet-guiding cylinder 22, so that perforations do not occur there. The perforating tools can be adjusted to the surface of the sheet-guiding cylinder 22 via the switching movements which can be introduced into the bearing and switching shaft 1 by means of couplings on the side walls.

This procedure can be necessary, for example, if numbering impressions are to be generated independently of perforations. The axial groove 2 allows the supporting bodies 6, which receive the perforating tools, to be brought into any axial positions between the numbering units. Due to the largely play-free design of the device according to the invention, a high stability of an adjustment once made can be ensured, so that it is insensitive to shocks occurring during machine operation.

Figure 3 shows the arrangement of the perforating tools between the sheet-guiding cylinder and the envelope of a numbering.

The bearing and switching shaft 1, which receives the supporting body 6 together with the perforating tools 20, is arranged in such a way that it lies outside an envelope curve 23 which describe the numbering mechanisms. This makes it possible that, in extreme cases, 5 positions of the supporting bodies 6 on the bearing and switching shaft 1 can be adjusted via the clamping screw, which enable perforations in the immediate vicinity of numbering mechanism impressions. The depth of the perforations on the printing material on the sheet-guiding cylinder 22 can be adjusted by the adjusting member 11.

Claims (12)

1. Web-fed printing machine with a device for receiving perforating tools opposite a sheet-guiding cylinder (22) having a carrying body (6) which includes a carrying-body bore passed through by a shaft (1) which runs parallel to said bore and on which the carrying body (6) is mounted in an axially displaceable manner, the carrying body (6) being provided with clamping means (5) for securing it with respect to the shaft (1) and a rotatably mounted eccentric ring (13) being provided as actuating means, characterized in that the shaft (1) which passes through the carrying body (6) serves as the mounting shaft of said carrying body and as the actuating shaft (1) for a perforating tool (19, 20) which is received on the eccentric ring (13), which can be adjusted relative to the carrying body (6) using adjustment means (11, 12, 16).
2. Web-fed printing machine according to Claim 1, characterized in that a rolling contact bearing (19) which receives a perforating rim (20) is mounted on the eccentric ring (13).
3. Web-fed printing machine according to Claim 1, characterized in that the outer ring of a rolling contact bearing (19) received on the eccentric ring (13) is designed as a perforating tool.
4. Web-fed printing machine according to Claim 1, characterized in that the inner ring of the rolling contact bearing (19) is designed as an eccentric ring (13).
5. Web-fed printing machine according to Claim 1, characterized in that a first stop (15) and a second stop (16) are formed on the eccentric ring (13).
6. Web-fed printing machine according to Claim 1, characterized in that, with respect to the mounting and actuating shaft (1), the eccentric ring (13) exhibits eccentricity (14).
7. Web-fed printing machine according to Claim 1, characterized in that the carrying body (6) comprises a stop (7).
8. Web-fed printing machine according to Claim 1, characterized in that the carrying body (6) receives a clamping screw (5) by means of which it can be fixed in its position on the mounting and actuating shaft (1).
9. Web-fed printing machine according to Claims 5 and 7, characterized in that a compression spring (10) is received between the first stop (15) of the eccentric ring (13) and the stop (7) of the carrying body (6).
10. Web-fed printing machine according to Claims 1 and 5, characterized in that an adjustment means (11) which acts on the second stop (16) of the eccentric ring (13) is provided on the carrying body (6) for the radial adjustment of the eccentric ring (13) with respect to the carrying body (6).
11. Web-fed printing machine according to Claim 1, characterized in that a protrusion (18) engaging into a continuous axial groove (2) of the mounting and actuating shaft (1) is configured on the carrying body (6).
12. Web-fed printing machine according to Claim 1, characterized in that the disengagement of individual perforating tools (20) located on the mounting and actuating shaft (1) takes place simply by rotating the carrying body (6), in the anticlockwise direction, with respect to the mounting and actuating shaft (1).

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