ES2618845T3 - Product slowdown station - Google Patents

Abstract

Product slowdown station (5) for a printing machine, with: a camshaft (9), on which a first number of cams (10) is arranged, and a counter roller (11), on which is arranged a second number of replaceable perimeter segments (30), being conformable with the second number of perimeter segments (30), which are arranged on the counterrunning roller (11), in interaction with the first number of cams (10), which arranged on the camshaft (9), a product slowdown slot in the form of a braking slot (12) of the product slowdown station (5), which is downstream of a folding mechanism (3) , of the printing machine, characterized in that each perimeter segment (30) comprises a wear ring that slides on the counter roller (11).

Description

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DESCRIPTION

Product slowdown station

The invention relates to a product slowdown station, which is formed according to the preamble of claim 1, for a printing machine.

The product slowdown stations of the generic type serve, e.g. for example, to slow down in its transport speed printed products, respectively individual copies, which have been separated from a band branch and preferably folded transversely in an upstream interleaved folding mechanism and that by means of a corresponding transport device, e.g. For example, a conveyor belt is transported to the product slowdown station, to be supplied to one or more additional folding devices, which are interspersed downstream by a deflection, to introduce the third fold, presenting the additional folding mechanisms a work cycle slower than the folding mechanism interspersed upstream of the product slowdown station, so products must be slowed down.

Usually, a product slowdown station of this type has a camshaft and a shaft, respectively, a counterdrive roller opposite the camshaft, which delimit between each other a braking groove, respectively a product slowdown groove, when the (s) cam (s) arranged on the camshaft is (n) in the position facing the counterdrive shaft. A printed product that arrives between the conveyor belts is braked in the product slowdown slot and, when the cam has advanced, it is transferred to the subsequent, slow running belt line.

Due to the sliding, the cams, but also the counterdrive roller, are exposed to high wear.

A product slowing station according to the preamble of claim 1 is known, for example, from US 6 394 445 B1. The product slowing station serves to slow down printing sheets in a printing machine, which are essentially uniformly spaced apart from each other and are consecutive, of a transport speed at a lower speed to be able to supply the printing sheets at a subsequent processing station, such as a rotary collector.

The known product slowdown station of US 6 394 445 B1 comprises in a main roller device a tree, on which several cam elements are in each case arranged in integral rotation by means of a set screw. Each cam element has an outward elevation, so that the cam elements form a cam shaft with the tree. A cam device for setting the pressure of the product slowdown station comprises a shaft, on which several cam elements are arranged for setting pressure, respectively replaceable perimetral segments, so that a counterdrive roller is formed for the camshaft. Each of the cam elements for setting pressure is composed of two halves, the two halves being attached one next to the other with screws and fixed in solidarity rotation on the tree by springs. The cam elements for setting pressure also have, in one of their two halves, respective raised cam-shaped elevations that interact with the cam-shaped elevations of the cam elements of the main roller device to slow down impression that pass through a product slowdown slot formed in between.

To ensure an accurate interaction of the cam-shaped elevations of the cam elements and of the cam elements for pressure setting, the rotational movements of these must be adjusted exactly to each other.

Document US 4 093 203 A discloses a product slowdown station, in which wear rings arranged on the counterdrive roll form a braking groove with cams arranged on the camshaft.

Starting from this, the objective of the present invention is to make available a product slowdown station, which is formed according to the preamble of claim 1, which is of simpler construction.

This is achieved by means of the features of the characterizing part of claim 1. Further developments of the invention are defined in the dependent claims.

According to the invention, the counterdrive roller of the product slowdown station has a number of replaceable perimeter segments. In this way, it is possible to avoid that the countermarking roller must be completely replaced in the case of wear of the perimeter segments, respectively of the perimeter surface of the perimeter segments. Advantageously, only the individual perimeter segment should be replaced. If a number of perimeter segments are planned, it is even possible that each perimeter segment can be replaced individually, so that the necessary maintenance work can be reduced even further.

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The perimeter segment has a sliding wear ring on the counterdrive roller. The wear ring can, e.g. eg, be lined or coated with an appropriate material, in the manner of a brake pad. The wear ring may in this case be formed as a hollow-cylindrical wear ring section of the perimeter segment, which is delimited to one or both axial sides by a fixing section. Because advantageously, the perimeter segment has a fixing device, with which it can be fixed on the axis of the countermarking roller. In this case it is advantageous that the wear ring, respectively the wear ring section, or the wear ring cover can be formed without sewing. But alternatively to the fixation by means of fixing sections it will also be conceivable to manufacture the perimeter segment as a sliding ring that can be dragged on a correspondingly shaped counterdrive roller (for example, quadrangular counterdrive roller).

A preferred form of manufacturing comprises, however, a perimeter segment that has a hollow-cylindrical wear ring section, which is followed on both axial sides by a half-section section that encompasses the 180 ° counterdrive roller and can be attached to the counterdrive roller by means of a separate half-rod component. The half-section sections provided on the two axial sides of the wear ring section and the half-section pieces in this case, together with advantageously provided threaded bolts, by means of which the half-pieces are fastened with the half-channel sections, the fixing device. For this purpose, a dividing plane is advantageously provided on the half-piece piece on both sides, in which the half-piece piece and the half-section section are supported next to each other, a flange projection, on which provided a through hole for the threaded bolts, and assigned threaded holes are provided in the half-piece piece, into which the threaded bolts can be screwed. But it will also be conceivable to fix the half-piece piece in each case to the respective half-section section on one side by means of a hinge and only provide a threaded joint on the opposite side.

Advantageously, in this case, the internal peripheral surfaces of the peripheral segment are shaped suitable for the counter-shaft shaft only in the section, respectively the half-cane sections and the piece, respectively the half-channel pieces, and in the section of wear ring is additionally with play, so that the perimeter segment is allowed to slide easily on the counterdrive roller. In addition, it is advantageous in this case if adequate support is not provided for the counterdrive roller over the entire periphery of the half-round piece and the half-section section, but only a four-point support is conformed by correspondingly selected projections in the internal penimeter of the half-cane piece, respectively of the half-cane section, so that a good centering of the perimeter segment on the tree results.

The product slowdown station can be maintained simply and economically by replacing the peripheral segments in the case of wear of the outer peripheral surface of the counterdrive roller, which wears out by the products to be slowed down, replacing only the segments peripherals instead of the entire counterdrive roller. Particularly in the case of several replaceable individual peripheral segments, a better accuracy of the groove width of the braking groove is also obtained in this case, because the product slowdown station can be maintained more frequently and more economically.

Other advantageous configurations and convenient improvements of the invention can be obtained in detail from the following explanation of an example of manufacturing the invention based on the attached drawing. They show:

Figure 1, a product slowdown station according to a manufacturing method of the invention

in the general context of the folding mechanism of a printing machine,

Figure 2, a schematic representation of the product slowdown station shown

in figure 1,

Figure 3, a peripheral segment according to a manufacturing form of the present invention for the

counterdrive roller of the product slowdown station shown in Figures 1 and 2, and

Figure 4, the counterdrive roller of the product slowdown station shown in the

Figures 1 and 2 with peripheral segments according to Figure 3 placed.

Figure 1 shows a conveyor belt conveyor 1, on which consecutive flat products 2 are housed spaced apart, also in the form of folded printed products, for example, newspapers. The belt crane 1 is disposed correspondingly downstream of a transverse folding apparatus 3, in which a band branch 4 is entered which is subdivided there into sections that are provided with a fold and transferred as folded printed products forming flat products 2 to the belt crane 1. The belt crane 1 joins the folding apparatus 3 to a product slowdown station 5 arranged downstream, by

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means of which the transport speed of the printed products 2 corresponding to the peripheral speed of the gma of tape 1 is reduced, approximately at a final speed of 60% of the preceding transport speed, so as, for example, to be slowed down a final speed appropriate to the duty cycle of one or more additional folding mechanisms. Downstream of the product slowdown station 5, a deflection 6 can be arranged, which can be followed by two grains of tape 7, 8 loadable alternately with consecutive braked flat products.

The product slowdown station 5 is composed, as best recognized in Figure 2, of a camshaft 9 with cams 10 arranged side by side with side distance and a counterdrive roller 11 assigned thereto. The cams 10 and the counterdrive roller 11 delimit in a position of the cams 10 assigned to the counterdrive roller 11 a braking slot 12, through which the supplied flat products 2 must pass to the slowdown station 5, the two rollers being driven 9, 11 in such a way that an output speed of the flat products 2 is reduced with respect to the peripheral speed of the gma of tape 1 and correspondingly to the transport speed of the incoming flat products 2 when the flat products are stopped in the braking groove 12. The width W of the braking groove 12 can be adjustable in this case, the camshaft 9 being adjustable in position with respect to the counterdrive roller 11, for which a drive motor can be provided 13 which is operated by means of control and sensors, which are not represented, according to the thickness of the printed product 2, as well as the wear of the counterdrive roller 11 yd and the cams 10. On the counterdrive roller 11, peripheral segments 30 formed as wear rings are placed in this case, as explained in detail below on the basis of Figures 3 and 4. One or all segments 30 may be fixed in this case an incremental scale 18, whereby the actual speed of the counterdrive roller 11 can be read by appropriate sensors to thereby regulate the rotating drive of the counterdrive roller.

A perimeter segment 30 that can be placed on the counterdrive roller 11 can be seen in detail in this case in Figure 3, in Figure 4 the countermarke roller 11 can be seen with eight perimeter segments 30 placed. Each perimeter segment 30 has a central wear ring section 31 that is flanked on both sides, 180 ° offset, by half-channel sections 32a, 32b. On each of the half-section sections 32a, 32b a half-piece piece 33a, 33b is screwed by means of threaded bolts 34, the half-length pieces 33a, 33b being constructively equal and the threaded bolts 34 being passed through holes of passage provided in corresponding flanges 35 of the half-piece piece 33a, 33b, and those being threaded into threaded holes assigned to the respective half-piece piece.

The positioning of the perimetral segments 30 on the counterdrive roller 11 can be advantageously simplified in this case because a central tree section is raised by means of a shoulder, as regards diameter, with respect to those tree sections, on which they must place the perimeter segments. The innermost perimeter segments 30 can then simply slide to the shoulder, each of the following perimeter segments 30 to the top of the preceding segment 30. It is only in this working position that the bolting to the tree takes place, so that a sufficient play for sliding can be provided. Preferably, the clearance between the internal penimeter of the wear ring section 31 and the counterdrive roller 11 is a few millimeters, and the adjustment in the half channel sections 31a is established by means of screwing the threaded bolts 34, 31b and half-round pieces 33a, 33b forming a fixing device.

Of course, deviations and modifications of the forms of manufacture represented are conceivable within the scope of the invention.

Claims (8)

5 10 fifteen twenty 25 30 35 40 1. Product slowdown station (5) for a printing machine, with: a camshaft (9), on which a first number of cams (10) is arranged, and a counterdrive roller (11), on which a second number of replaceable perimetral segments (30) is arranged, being conformable with the second number of perimeter segments (30), which are arranged on the counterdrive roller (11), in interaction with the first number of cams (10), which are arranged on the camshaft (9), a product slowdown groove in the form of a braking groove (12) of the product slowdown station (5), that it is downstream of a folding mechanism (3), of the printing machine, characterized in that each perimeter segment (30) comprises a wear ring slidable on the counterdrive roller (11). 2. Product slowdown station (5) according to claim 1, characterized in that the second number of perimeter segments (30) comprises several perimetral segments (30) distributed along the axis of the counterdrive roller (11). 3. Product slowdown station (5) according to claim 1 or 2, each perimeter segment (30) presenting a fixing device (32a, 33a, 32b, 33b, 34), with which it can be fixed to the counterdrive roller ( eleven). 4. Product slowdown station (5) according to claim 3, each perimeter segment (30) presenting a hollow-cylindrical wear ring section (31), which is followed by at least one axial section on an axial side channel (32a, 32b) which in each case is clamped with a half-piece piece (33a, 33b) apart. 5. Product slowdown station (5) according to claim 4, presenting at least the half-section or half-piece (33a, 33b) on both sides in a dividing plane in the half-section (32a, 32b) and the half-piece piece (33a, 33b) a flange projection (35) which with its surface oriented towards the opposite part (32a, 32b) can rest on the dividing plane in a non-smooth way on a surface, which is oriented towards that, in the opposite part (32a, 32b), the flange projection (35) and the opposite part (32a, 32b) being provided with at least one hole, so that the half-channel section (32a, 32b ) and the separate half-piece piece (33a, 33b) are screwable. 6. Product slowdown station (5) according to claim 4 or 5, forming the half-section (32a, 32b) and the half-piece (33a, 33b) in the fastened state of the fixing device (32a, 33a, 32b, 33b, 34) a four-point support. 7. Product slowdown station (5) according to one of claims 3 to 6, the wear ring section (31) being formed with play towards the counterdrive shaft (11). 8. Product slowdown station (5) according to claim 7, the set being several tenths of a millimeter.