JPS61158450A - Sheet shifting cylinder for sheet rotary press - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sheet-fed transfer cylinder for a sheet-fed rotary printing press, which forms a jacket wall for holding sheets and which is capable of holding sheets. of the type having a plurality of sheet support segments extending over the length of the transfer cylinder, each sheet support segment being radially adjustable together by a centrally operated adjustment mechanism; related to things.

BACKGROUND OF THE INVENTION In prior art multicolor sheet-fed rotary printing presses of row construction, the sheets are conveyed from one printing unit to the next, for example by a sheet transfer cylinder of the type described above. In this case, the sheets are placed with their printed side in contact with the outer surface of the sheet transfer cylinder, so that smudging of the still-moist printed image can occur.

In order to be able to use a single sheet-fed rotary press to process different paper qualities and thicknesses, from thin airmail paper to zeal paper, the previously described sheet-fed rotary press was modified in the radial direction. An adjustable design is advantageous, so that the risk of staining can be eliminated as much as possible even with different material properties of the printing materials used.

Therefore, in the case of thin and soft printing materials, it is desirable to create as little a gap as possible between the sheet transfer cylinder and the winter clothes placed in front and behind the transfer cylinder, so that the sheet can be guided well. It is possible to prevent wrinkles from forming. On the contrary, in the case of thicker printing materials such as cardboard, it is advantageous to create a larger distance between each winter coat, i.e. its respective jacket surface, since this printing material has its own unique characteristics. This is because the sheet support member is not required due to the sufficient strength. A suitably selected distance thus reduces the risk of fouling.

In the structure known from U.S. Pat. No. 1,358,843, which is prior art in this connection, there are Φ jacket surfaces to hold the sheets, each extending over the width of the sheet transfer cylinder and one Consists of radially adjustable segments via an adjustment mechanism. This adjustment is carried out simultaneously for all segments with end-mounted handlebars. In this case, in addition to the joint adjustment mechanism for each segment, additional plant pistons are required as guide members to prevent the occurrence of transverse movements in the longitudinal direction of the barrel other than its radial movements. Therefore, the structural cost is relatively high. It is also disadvantageous that the adjustment of the easy direction can only be carried out in steps. It is also possible, for example, for the trailing edge of the sheet to undergo a greater flapping movement than the leading edge of the sheet held by the gripping claws, so that each segment can be formed at different depths in the sheet transfer cylinder in a manner that is easily accessible. The fact that it is necessary to do so is also not taken into account.

OBJECT OF THE INVENTION It is therefore an object of the present invention to create a sheet transfer cylinder with radially adjustable sheet support segments in a structurally simple manner, which with its core is capable of overlapping each of the previously mentioned known techniques. This eliminates the drawbacks and makes possible a centrally operated and stepless radial adjustment movement of each sheet support segment, in which case the segment area assigned to the trailing edge of the sheet is assigned to the leading edge. Additional means must also be provided to allow adjustment, for example in the radial direction, to a greater extent than the segment range defined.

SUMMARY OF THE INVENTION According to the invention, the above-mentioned object is achieved in particular by providing in each sheet support segment in the area of both end faces of the sheet transfer cylinder:
The solution is that an oscillating coupling transmission is provided with a drive rocking body that engages in the pivot point, and that a centrally actuated gear transmission is arranged in front of this drive rocking body.

According to German Democratic Republic Patent No. 76684,
A sheet-fed guide cylinder in a multicolor sheet-fed rotary printing press for single-sided or double-sided printing, in which each guide segment arranged on its circumference is radially movable and for the radial movement of the guide segment. The structure itself in which a parallel rocking body is arranged is well known. The cam-controlled hinge mechanism has on its pivot axis a separate pivoting parallel rank transmission, which provides forced actuation when the cam-controlled circular eccentric member is moved out of its extended position. Guaranteed.

However, in this case the radial movement of the guide segments of the sheet transfer cylinder takes place in the cycle of the printing press operation, so that
This known structure is not suitable for solving the problem of the invention mentioned above. Also, the cost of the transmission mechanism is too high.

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a sheet transfer cylinder 1 and an impression cylinder 2 cooperating with a core 1 of the respective printing unit arranged in front and behind it.
, 3 are shown. In the illustrated example, three sheet support segments 5 are arranged which are uniformly distributed in the circumferential direction, each segment 5 extending over the length of the sheet transfer cylinder 1, each of which Holds one sheet of paper.

A gripper bridge 6, which is respectively assigned to each sheet support segment 5, has a gripper pawl 7 and a gripper support element 8 which operate in a conventional manner and securely hold the respective sheet jar.

(The gripper bridge 6 is fixed by a fastening member 9 to a suitable web 11 arranged on the inner cylinder 10. Each end face 12, 13 (FIG. 3) of the inner cylinder 10 has a printing press. A bearing pin 16, 17 is arranged which is supported in each end wall 14, 15 of.

A toothed plate 2o, 21 is rotatably supported on each bearing pin 16, 17 and is secured axially immovably by securing linogs 22, 23.

A pinion 24.25 is engaged in the toothed area 18.19 of each toothed plate 20.21.
are each arranged non-rotatably on an adjusting shaft 26 extending over the length of the sheet transfer cylinder 1;
itself further includes suitable bearing points 27, 2 of the inner cylinder 10.
It is rotatably supported at an angle of 8°29. Sheet paper transfer cylinder 1
A worm gear 30 is mounted on the adjusting shaft 26 in the central region of . An adjustment pin 32 is arranged in the extension of the worm 31 meshing with this worm gear 30, the upper head end 33 of which can be rotated by means of a suitable working member (e.g. a plug-in wrench). It is dovetailed and can be fixed via a locking screw 73. In the illustrated example, the worm 31 and the adjustment pin 32 are supported in a holder 34 fixed to one of the three (grip claws) 6.

The conditions for centering all sheet support segments 5 are given as follows.

One connecting rod 39.40 at each evenly distributed pivot point 37.38 of each toothed plate 20.21.
are pivotally connected, and the other hinge point 41, 42 of this connecting rod 39.40 connects the area of each sheet support segment 5 holding the sheet trailing edge 4.1 with the rocker 43.44. The rocking bodies 43 and 44 are also connected to the web 11.
A frame-fixed pivot point 45 provided on the extension 47 of
．． It is fixed at 46. This transmission mechanism is therefore designed as a coupled transmission mechanism with a swinging hand part.
Moreover, the driving movable body is connected to the toothed plates 20 and 21 by a connecting rod p39. It is defined by the radial distance between the +○ pivot point 37, 38 and the torso centerline 72.

The area of each sheet support segment 5, which holds the front edge 2 of the sheet, is connected to another frame-fixed extension 52, 53 which is rotatably supported on the gripper support 8.
It has further pivot points 48,49 for the two rockers 50°51. This pivot point is in this case formed by a suitably arranged bearing pin.

Via a central adjustment of the worm 31, all three sheet support segments 5 are therefore simultaneously swiveled radially.

This creates, for example, the positions of all sheet support segments 5 shown in FIG.

In this case, by suitably selecting the length and the pivot point of each transmission element, the radial adjustment movement 60,61 of each sheet support segment 50 can be created differently over the circumference,
That is, the amount of adjustment movement 60 in the area of the trailing edge 4.1 of the sheet is greater than the amount 61 in the area of the leading edge 4.1.

Figure 6 shows a sheet transfer cylinder 62 according to another embodiment of the invention.
It is shown. In this case, only the extent of each of the three sheet support segments 6), which retains the respective sheet trailing edge 1, is adjustable. For this purpose, in the first exemplary embodiment, a connecting rod r:v9. +◯ are each connected to a sheet support segment 63. The area of the sheet support segment 6) which holds the sheet leading edge 4.2 is connected directly at a pivot point 64 to a frame-fixing web 65 of the gripper support 8. By rotating the toothed plate 20.21 via the aforementioned worm drive 30.31, the sheet support segment 63 is brought into the position shown in dotted lines in FIG. In this case, this mechanism is designed as an oscillating coupling gear consisting of Φ parts, the driving motion being again a toothed disc 20°2.
1 by the radial distance of the pivot point 37° 38 of the connecting rod r39, 40 to the cylinder centerline 72. The driven moving body is formed by the sheet support segment 63 itself.

Furthermore, in the particularly advantageous embodiment shown in FIG. , each sheet support segment at the sheet leading edge 4.2 and trailing edge hand.

It is possible to adjust the radial direction in a range of 1 (
(illustrated with dashed lines), the adjustment movements 60, 61 can also be made different in this case. both end faces 12 of the sheet transfer cylinder 670;
Each oscillating coupling transmission mechanism of Φ elements arranged at 13 is formed by a sheet support segment 66 of a sheet transfer cylinder 67, and is formed by a sheet support segment 66 of a sheet transfer cylinder 67. Engaged in the segment 66 at pivot points 68, 69 are the toothed plate 2o to be driven and a driven movable body 71 which is supported at a frame-fixed pivot point 70.

As mentioned above, in all embodiments of the invention, gear transmissions 20, 21, with a rear-connected coupling transmission are provided.
24, 25, 30, 31 make it possible to carry out a simultaneous and stepless radial adjustment of each sheet segment, and also to make rapid adjustment possible in a simple manner as required. The advantage of the adjustable sheet transfer cylinder according to the invention is therefore its wide applicability, and in addition, suitable measures can be taken already during its manufacture (e.g. optional adjustment of the hinge pins to the respective pivot points). It is possible to have selectable holes, which allow different pivot points to be positioned at other locations, thereby varying the transmission length and thus the coupling curve of the individual coupling elements. , thereby making it possible to adapt the adjustment range of the radial adjustment of the sheet support segment to the given requirements.

In this case, as mentioned above, the radial adjustment can be carried out manually or by means of an electric motor or hydraulically or hydraulically. Similarly, a thin, multiple-type body (double.

It is also possible within the scope of the present invention to use it for live molds).

[Brief explanation of drawings]

end view with the sheet support segment in the second
3 is a side view of the sheet transfer cylinder shown in FIGS. 1 and 2; FIG. 3 is a side view of the sheet transfer cylinder shown in FIGS. FIG. 5 shows an end view of a sheet transfer cylinder with sheet support segments that are radially adjustable only in the area of the sheet trailing edge; FIG.
1 shows a schematic end view of a sheet transfer cylinder according to another embodiment, which, like the illustrated example, requires only a particularly small number of transmission elements; FIG.

Claims (1)

[Claims] 1. A sheet-fed transfer cylinder for a sheet-fed rotary printing press, comprising:
It has a plurality of sheet-supporting segments forming the sleeve wall for holding the sheets and extending over the length of the sheet-transfer cylinder, each sheet-supporting segment being connected to one central In particular, the sheet transfer cylinders (1, 62, 6
A pivot point (
An oscillating coupling transmission is assigned with a driving motion body which engages the drive motion bodies (24, 25, 30,
31) is arranged in front of a sheet-fed transfer cylinder for a sheet-fed rotary printing press. 2. Each of the drive rocking bodies arranged on both sides has one toothed plate (20,
21), and in this case, the length of each driving and moving body is from the trunk center line (72) to the connecting member (3) disposed at the rear.
9, 40, 46) pivot points (37, 38, 68, 69)
2. A sheet transfer cylinder according to claim 1, wherein the sheet transfer cylinder is defined by a radial distance from . 3. Tooth range (18, 19) of each toothed plate (20, 21)
The pinions (24, 25) are engaged with the sheet transfer cylinders (1, 62, 67).
) is arranged non-rotatably on an adjusting shaft (26) which extends over the length of the adjusting shaft (26), in the central region of which a worm gear (30) is mounted; 30), in which a rotatable worm (31) is engaged by an adjustment pin (32).
Sheet-fed paper transfer cylinder as described in section. 4. The area of each sheet support segment (5, 66) assigned to the sheet trailing edge (4, 1)
4. Sheet transfer cylinder according to claim 3, wherein the sheet transfer cylinder is adjustable in the radial direction to a greater extent than the area assigned to the cylinder. 5. Sheet trailing edge (
Claim 3, characterized in that only the area assigned to 4, 1) is radially adjustable, and the area assigned to the leading edge of the sheet (4, 2) remains in place. sheet-fed paper transfer cylinder. 6. A connecting rod (39,
40) are pivotally connected, and the connecting rods (39, 40)
the respective other pivot points (41, 42) of each sheet support segment (5) hold the sheet trailing edge (4, 1) and one rocker (43, 44). The oscillating bodies (43, 44) are also connected to pivot points (45, 46) arranged on the extension (47) of the web (11) of the inner cylinder (10) and fixed to the frame. ), and the area of each sheet support segment (5) which holds the sheet leading edge (4, 2) is connected to another rocker (5).
0, 51), which rockers (50, 51) each have a frame-fixed extension fixed to the gripper bridge (6). (
52, 53), the single wafer transfer cylinder according to claim 4. 7. Each sheet support segment of the sheet transfer cylinder (67) (
66) itself is a component of the oscillating coupling transmission and forms a coupling rod, and the pivot point (68,
69), the toothed plate (20) to be driven and the pivot point (
The driven moving body (70) is fixedly supported by the frame.
1). The sheet transfer cylinder according to claim 4, wherein 8. One connecting rod (39, 40) is pivotally attached to the pivot point (37, 38) of each toothed plate (20, 21), and this connecting rod (39, 40) It engages the paper support segment (63) in the area holding the sheet trailing edge (4, 1), which sheet support segment (63) forms the driven motion body of the coupling gear. and sheet trailing edge (4,
2), the sheet transfer cylinder according to claim 5, which is articulated on a frame-fixed web (65). 9. Three sheet support segments (5, 6) uniformly distributed circumferentially of the sheet transfer cylinder and extending over its length.
3, 66), according to any one of claims 1 to 8.