DE7037679U - Device for correct sheet transfer by means of gripper chains on printing machines - Google Patents

Description

High-speed press factory

Koenlg & Bauer AG Wuerzburg, October 8, 1970

Würzburg / Germany 326 / wm / RB

Utility model registration

Device for correct sheet transfer by means of gripper chains in printing machines

The innovation relates to a device for handing over the sheet in a fitting manner in printing machines by means of endless gripper chains, with the gripper systems consisting of traverses, the grippers and gripper supports are movably suspended on the gripper chains and in the arch transfer position by rotating with the chain wheels prismatic trained locking forks aligned both in the circumferential and in the radial direction and locked with the aid of hooks and the bearing blocks aligning the traverses by means of adjusting screws or stops against also with the sprocket shaft Support circumferential supports, according to German patent specification 1 22U 753.

This known device is for use in multicolor letterpress printing machines excellently suited. It is characterized by a long service life with constant precision.

When using these devices in offset printing machines impermissible tonal value fluctuations resulting from duplication of the printed images. These phenomena would arise from the play between the support roller and the bolt and from the

High-speed press factory Koenig & Bauer AG - 2 - Würzburg / Germany October 8, 1970

relatively high necessary pretension between hook and support roller result. Secondly, it would be from the static ut · == - by Anschlüge αιι certain locking of the bearing blocks allow the r.olle derived. Furthermore, the scatter in the manufacturing accuracy of the support surfaces on the sprockets of the first and second printing unit would also have an unfavorable effect on the achievable fit accuracy.

The object of the innovation is based on the task mentioned To improve arrangements of the known device so that they meet the requirements of offset printing.

The object is achieved according to the invention in that tensioning rollers are arranged on both sides next to the support roller on which the Hooks act so that the clamping surface of the hooks to the tensioning rollers are wedge-shaped and between the hooks and their drive shafts Springs is switched on so that the stops are resiliently supported on support arms and an adjusting screw next to the stop is arranged, the stop on a support surface of the support arm of the first printing unit and the adjusting screw is supported on a support surface of the support arm of the second printing unit of the printing press.

The solution according to the innovation creates a device which is ideally suited to meet the requirements that arise in the construction of offset printing machines.

High-speed press factory Koenig & Bauer AG - 3 - Würzburg / Germany October 8, 1970

An embodiment is shown in the drawing and will explained in more detail below.

Show it:

Figure 1 is an end view of the gripper system of the first printing unit in sheet transfer position,

Figure 2 is a plan view of a sprocket shaft,

Figure 3 shows a section along the line III - III in Figure 1,

Figure h shows a section along the line IV - IV in Figure 1 and

Figure 5 is a front view of the gripper system of the second printing unit in sheet transfer position.

An indicated printing unit cylinder of a first printing unit is denoted by 1.1, and a second printing unit is denoted by 1.2. At the sheet transfer point of the printing unit cylinder 1.1, chain wheels 2.1 for guiding endless gripper chains 3 are arranged and on their shaft h. 1 firmly wedged.

In the following, all parts that are assigned to the first printing unit are given the suffix .1, e.g. 2.1, and those for the second Parts belonging to the printing unit are marked with .2, e.g. 2.2.

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Säinellpressenfabrik Koenlg & Bauer AG - h - Würzburg / Germany October 8, 1970

A traverse 5 carries grippers 7 and gripper pads 8 of a gripper system 6. With the endless gripper chains 3, a number are vprhnnflpn via gripper systems 6. So z. B. 8 gripper systems at equal distances between the first and the second printing unit. In each traverse 5 rubber bushings 9 are embedded at both ends, in which support bolts 10 and 11 of the gripper chains are freely supported. On the traverse 5, bearing blocks 12 are attached, which have radially below the gripper pads 8 downwardly projecting eyes for a bolt 1U on which ground support rollers 15 sit. Aligned with the support rollers 15 are prism bearings 16.1, which are screwed to support arms 17-1 attached to the sprocket shaft U.1 and are prismatically shaped in such a way that the support rollers 15 can run into the prism bearings 16.1 from above like ground teeth in the area of the sheet transfer. The gripper system 6 can thus be supported by axially aligned prism bearings 16.1 during sheet transfer. On both sides, next to the support rollers 15 that have come to storage, there are tension rollers 31.1, which are acted upon by hooks 18.1 provided with a wedge surface 32.1 so that the support rollers 15 are mainly pressed from above against the prismatic bearings 16.1, whereby they are rigidly connected to the sprocket shaft U.1 will. The hooks 18.1 are automatically pivoted on bolts 19 · 1. An upper hook part 33.1 can pivot with respect to a lever 3 ^ .1, which is firmly connected to the bolt 19-1. A spring 35.1 is arranged between hook 33.1 and lever 3 ¹ ^ -I, as a result of which the wedge surface 32.1 always presses on the tensioning roller 31 with approximately the same pretension.

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Schnellpressenfabrlk Koenig & Bauer AG - ₅ _ Würzburg / Germany October 8, 1970

The movements of the aolzens 19-1 are not represented by Effect cams and control rollers. The gripper system 6 is thus rigidly connected to the sprocket shaft U.1 at the arch transfer point at the prism bearings 16.1, so that also at lightweight design of the gripper system 6 any risk of register-endangering Centrifugal force or other effects are avoided.

The gripper system 6 is also resiliently mounted with respect to the gripper chain 3 by the two rubber bushings 9. As a result, the gripper system 6 is freely movable to a limited extent in all directions with a correspondingly effective pressure compared to the gripper chain 3, so it is possible to lock the gripper system 6 with the first sprocket shaft U.1, but the gripper chain 3 a certain freedom of movement for the acting Centrifugal forces and to compensate for their variable stretching length. In addition, the resilient mounting allows the pivot position of the gripper system 6 to be adjusted in the circumferential direction. For this purpose, in the sole of the bearing block 12, in front of and behind the support roller I5, there are two stops 23 and 2U directed parallel to the radial line of the system, as well as an adjusting screw 36 arranged in the axial direction of the sprocket shaft k, 1 next to the stop 2k , the stops 2k being the Support arm 17.1 of the first printing unit and the adjusting screws 36 are assigned to the support arm 17.2 of the second printing unit of the printing press. For this purpose, the support surfaces 26.1 and 37.2 are attached to the relevant support arms 17-1 and 17.2 and offset in the axial direction. To the Grobju-

High-speed press factory Koenig & Bauer AG - 6 - Würzburg / Germany October 8, 1970

bticrüüg der StcllöCiii ο, αυδ 3υ dlSnt SlIiS άΰ Κθΐ t εΰΓ Sd 2.1 dsr 61 "most printing unit attached reference surface, which is a certain amount lower than the support surface 37.2 of the sprocket 2.2 of the second printing unit. To compensate for this dimension, between ier A precisely dimensioned adjusting block is inserted into the reference surface and the adjusting screw 36. The stop 23 is supported on spring bolts 38.1 and 33.2 arranged in the support arms 17.1 and 17.2, so that the bearing blocks are always under spring tension with their stops 2k or adjusting screws 36 on the The spring bolts 38.1 and 38.2 act in the direction of the gripper opening, so that the forces resulting from the gripper mechanism and the force of the spring bolts 38 add up.

Thus, each gripper system is related once in the circumferential direction on di · .-: · ρ .jte Druckverkseinhei; aligned and can be independent of which are adjusted to the exact position of the second printing unit for the sheet transfer.

If the gripper chain 3 works together with more than two printing units, are independent adjusting screws with their respective support surfaces for each printing unit to be provided.

/ Protection claims

Claims (2)

1. Device for correct sheet transfer to Druckverken by means of endless gripper chains, with those made of traverses, the Grippers and gripper pads existing gripper systems are movable are suspended from the gripper chains and in the sheet transfer position by revolving with the chain wheels prismatic locking forks both in circumferential and in aligned radial direction and locked with the help of hooks and ie the traverses aligning bearing blocks support by means of adjusting screws or stops against supports that also rotate with the sprocket shaft, according to the German Patent specification 1 22 ^ 753, characterized in that on both sides next to the support roller (15) tensioning rollers are arranged on which the hooks (18.1 or 18.2) act that the tensioning surface (32.1 or 32.2) the hooks (18.1 or 18.2) to the tensioning rollers (31) run in a wedge shape and between hooks (18.1 or 18.2) and their drive shafts (19-1 or 19.2) springs (35.1 or 35.2) are switched on that stops (23) are resiliently supported on support arms (17.1 and 17.2) and next to the Stop (2U) an adjusting screw (36) is arranged, the stop (2 * 0 on a support surface (26.1) of the support arm (17.1) of the first printing unit and the adjusting screw (36) on a support surface (37.2) of the support arm (17-2) of the second printing unit of the printing machine is supported. O 8813 High-speed press factory Koenig & Bauer AG _ s 2 - Würzburg / Germany October 8th, 2019 Ί ' 2. Apparatus according to claim 1, characterized in that the spring clips (33) act in the direction of the gripper opening.