CN101910036B - Device with impeller for laying printed matter on a conveyor belt - Google Patents

Abstract

The invention relates to a device for applying printed products (07) on a conveyor belt (12), comprising an impeller (01) which carries a plurality of blades (02) distributed in the circumferential direction, which blades each form an outer side and an inner side of a compartment (03) for receiving the printed products (07), and at least one braking body (08), wherein the braking body (08) has a braking surface which is swept by the printed products (07) introduced into the compartment (03), wherein the braking body (08) is arranged such that it enters the impeller (01) at the rear end of the blade (02).

Description

Device with impeller for laying printed matter on a conveyor belt

technical field

The invention relates to a device with impellers for laying printed matter on a conveyor belt.

Background technique

DE 10 2004 022 082 B4 discloses a laying device with a rotatable impeller and a brake body fixed in position relative to the rotation of the impeller, which bites into the blades of the impeller and tightens the blades so that the sliding The printed matter entering the grid of the impeller rubs on the one hand on the brake body and on the other hand on the blades forming the outer sides of the grid and is thereby braked. The braking prevents the printed product from hitting the floor of the grid too violently, which would damage the printed product or lead to a kickback, which in turn leads to an uneven laying of the product onto the conveyor belt behind the impeller.

In order to achieve a satisfactory braking effect, the position of the conventional braking body must be exactly matched to the lead-in movement and the thickness of the print entering the grid. If the print reaches the braking body too early or if the print is too thick to match the gap between the vane and the braking body at the moment of entry into the grid, the print is braked particularly suddenly and appears as if it were not braked. Same problem in case the product hits the bottom surface of the lattice. In extreme cases, the brake body may even cause the printed matter to bounce back, causing the printed matter to be ejected from the grid again. Although the deceleration of the brake body acting on the printed product decreases during the rotation of the impeller, it does not affect the initial excessive deceleration of the printed product, so that the printed product does not enter the grid deeply enough, which in turn causes uneven laying onto the conveyor belt. Conversely, if the print enters the cell too late, the gap between the outer blades of the cell and the braking body is already so large that effective braking no longer takes place. In principle, the braking device is thus sensitive to deviations in the entry times of the printed matter. Slight differences in the thickness of the product to be processed are sufficient to necessitate an adjustment of the laying device.

GB2168686A discloses an impeller in which a flexible member for clamping documents in the pocket is arranged.

DD280087A1 relates to a device for applying products in scales, in which a plurality of cleaning rollers are arranged between the blades behind the stripper.

DD264190A1 discloses an impeller with air nozzles for brake products. In addition, drive rollers for accelerating the product during laying are provided on the conveyor belt.

US 2005/0023746 A1 discloses a device for laying sheets on a conveyor belt with an impeller and a braking body, wherein the braking body can be designed as a wheel part and the braking surface of the braking body is assigned to the impeller. shaft.

US Pat. No. 6,354,591 B1 discloses an impeller in which, for braking the product, a cleaning roller is provided which bites but does not drive on the front end of the product.

Contents of the invention

It is therefore the object of the present invention to provide a device with impellers for depositing printed products on a conveyor belt.

According to one aspect of the invention, the device for laying printed matter on a conveyor belt has an impeller carrying a large number of blades distributed in the circumferential direction, the blades respectively forming the outer side and the inner side of the grid containing the printed matter, the device also has at least one Brake disc, wherein the brake disc has a braking surface swept by the printed matter introduced into the grid, wherein the braking surface of the brake disc faces the rotation axis of the impeller, wherein the projection from the axial direction of the rotation axis of the impeller From the point of view, the brake disc is arranged to enter each grid with printed matter on the rear end of the blade, wherein the brake disc is rotationally driven in the grid of the impeller by frictional contact with the printed matter conveyed into the grid, wherein the braking A disc is arranged on the lower half of the impeller and in front of the lower apex of the impeller, and the brake disc is arranged to overlap the lattice in axial section.

The advantages achievable with the invention are in particular that the device for laying printed matter on a conveyor belt has an impeller carrying a large number of blades distributed in the circumferential direction and a braking body which does not rotate around the axis of the impeller, wherein the blades respectively form a holding printed matter The outer and inner sides of the grid, the braking body has a braking surface swept by the printed matter introduced into the grid, and the braking surface of the braking body faces the rotation axis of the impeller. The positioning of the braking surface causes the braking of the printed matter to take place between the braking surface and the vanes forming the inner side of the cell. The gap between these two surfaces does not get wider during the rotation of the impeller, but narrows. Prints that enter the grid earlier are braked slightly and more strongly afterward; prints that enter later (where there is less time for braking) are braked immediately and strongly. The device can thus accommodate varying entry times or varying product thicknesses; all braked in a suitable manner.

The braking device is designed as a roller, which overlaps the lattice of the impeller in axial section. A relatively careful braking of the product entering the cells, but a strong braking of the rebounding product can be achieved by suitable rotation of the rollers.

For effective implementation, the brake roller is arranged on the lower half of the impeller and in front of the lower apex of the lower half of the impeller. Thus, the impulse (with which the printed matter enters the cells) helps to press the printed matter against the brake roller.

In order to brake the rebounding product more strongly than the incoming product, the braking roller expediently rotates in the opposite direction of the impeller.

Frictional contact with the printed matter entering the cells of the impeller is sufficient to rotationally drive the braking roller.

In order for printed matter to be able to pass over the braking body, the overlapping of the braking body with the grid of the impeller is limited to the radially outer area of the grid.

A stripper with a surrounding stripping surface can be provided for laying the printed product from the grid onto the conveyor belt. When the stripper is stationary, the leading edge of the printed product is pulled past the surface of the stripper, while the surrounding stripping surface then causes the printed product to move radially outward during stripping. Friction and stress on the print during peeling is thus minimized.

The stripping surface can in particular be a revolving endless conveyor belt.

The endless conveyor belt is preferably wound around the shaft of the impeller, in particular it revolves on the pulley of the impeller. The advantage of this arrangement is that the structure is simple, and it can avoid the winding path of the endless conveyor belt being too small.

A pulley on which the endless belt turns can be fixedly connected to the impeller for driving the endless belt. The speed of the endless conveyor can be adjusted by a suitable choice of the radius of the pulleys so that the leading flange of the printed product is always in contact with the same point of the endless conveyor during stripping.

A similar effect can also be achieved if the peeling surface is the peripheral surface of the roller.

It can be used particularly advantageously if at least two entry positions for printed matter are distributed over the circumference of the impeller, since this allows a temporal variation of the cells entering the impeller.

Description of drawings

Embodiments of the invention are shown in the drawings below and described in detail below. in:

Figure 1 is a schematic axial sectional view of a laying device according to a first embodiment of the invention, with an enlarged section X;

Fig. 2 is a partial view of the laying device of Fig. 1 at a later point in time than Fig. 1;

4 to 6 are detailed views of the laying device.

Detailed ways

FIG. 1 shows a schematic cross-sectional view of a laying device according to a first embodiment of the invention. The heart of the laying device is the impeller 01 with a large number of helically shaped blades 02 in cross-section, respectively formed to accommodate passing entry positions 04, 06, in particular belt conveyors 04, 06 prints 07 pairs of grid 03. As an example, a print 07 is displayed in one of the grids 03 . The impeller 01 preferably has a plurality of impeller disks 05 arranged side by side at intervals in the direction of its rotational axis.

The laying device is preferably arranged in a folder of the printing press.

The impeller 01 is divided axially into a large number of segments, namely impeller disks 05 . For example, a brake body 08 , which is pivotably suspended about an axis 09 , in particular a brake roller 08 , a brake wheel 08 or a brake band, can be introduced into the gap between the impeller disks 05 of the impeller 01 .

The distance between the axis of rotation of the impeller 01 and the axis of rotation of the brake body 08 , such as the brake wheel 08 , is variable. This variation can be achieved by supporting the braking body 08 by means of the linear guide 10 .

Also biting into the gaps between the segments of the impeller 01 are strippers 11 , in particular stripping disks 11 or stripping rollers 11 and/or stripping segments 15 which are fixed during operation. The conveyor belt 12 extends below the stripping roller 11 or the stripping disc 11 and/or the impeller 01 . The peeling roller 11 is located on the conveyor belt 12 or on the printed product 07 , not shown in FIG. 1 , which is laid on the conveyor belt 12 and is rotationally driven via a frictional connection to the printed product 07 .

The stripping segment 15 is preferably adjustable relative to the axis of rotation of the impeller 01 .

Preferably, a plurality of impeller disks 05 are arranged at intervals in the axial direction of the rotation shaft of the impeller 01 , wherein at least three impeller disks 05 are arranged. At least one brake disk 08 is arranged in the space between two impeller disks 05 .

In the axial direction of the rotational axis of the impeller 01 , at least one brake disk 08 is also arranged outside the two outer impeller disks 05 .

During the continuous rotation of the impeller 01 , the printed product 07 guided by one of the belt conveyors 04 , 06 and thrown into one of the cells 03 first slides into the cell 03 along the outer impeller 02 (for defining the cell 03 ). In the position shown in FIG. 1 , the printed product 07 is in contact with the braking roller 08 . Seen in projection in the axial direction, the braking rollers 08 are arranged to enter the individual compartments 03 on the rear ends of the blades 02 . The braking surface of the brake disk 08 and the inner side of the blade 02 have an opening angle α of less than 45°, in particular less than 30°, preferably less than 15°, in the area of their intersection when the braking surface enters the grid 03 of the impeller 01 . By continuous rotation of the impeller 01 the printed product 07 is lifted off the outer blade 02 by the brake roller 08 (as shown in FIG. 2 ) and clamped against the brake roller 08 in the position of the impeller turned slightly out of the position of FIG. 2 and grid 03 between inner blades 02. The friction that occurs at this time drives the brake roller 08 in rotation and at the same time decelerates the printed product 07 . The length of the deceleration stroke of the printed matter can be adjusted by the position of the brake roller 08 or the brake disc 08: the more the brake roller or brake disc overlaps the impeller 01, the greater the deceleration. If the deceleration is not enough to prevent the printed product 07 from bouncing back when reaching the bottom surface of the grid 03, the brake roller 08 or the brake disc 08 prevents the undesired back movement of the printed product 07, on the one hand because, due to The self-rotation of brake roller 08 or brake disk 08, the deceleration that implements on the printed matter 07 that moves out from lattice 03 is far greater than the deceleration that implements on the printed matter 07 that enters, and on the other hand, due to the braking during the rotation of impeller 01 The clamping between the idler roller 08 or brake disc 08 and the inner vane 02 increases and is therefore greater in the case of a rebounding printed product 07 than in the case of an incoming printed product 07 .

The brake roller 08 can have a single wheel-shaped element, namely the brake disc 08 , on which the through shaft is arranged. It is also possible to provide a dedicated shaft for a group of wheel elements or for each wheel element, ie brake disk 08 . These axes can change position independently of each other.

The roller body of the braking roller 08 can also be provided with annular grooves, so that the segments of the impeller 01 can bite into these grooves. Preferably at least two braking bodies 08 are arranged in the axial direction.

The brake roller 08 can be deflected elastically, for example, in a direction away from the impeller 01 in order to prevent the impeller 01 from jamming on the brake roller 08 when the printed product 07 is decelerated.

The brake roller 08 is clamped on the shaft 09 preferably in a frictional manner.

As shown in FIG. 2 , the leading edge of the folded sheet of the printed product 07 reaches the peeling roller 11 a little before the bottom face of the arrival grid 03 . The peeling roller rotates in the same direction as the impeller 01 , so that the printed matter 07 is simultaneously removed from the grid 03 and pressed against the outer blade 02 by the peeling roller 11 . The print 07 is thus prevented from bouncing back by the peeling roller 11 , and a uniform, scaly arrangement of the printed product 07 is applied to the conveyor belt 12 passing under the peeling roller 11 .

According to the laying device of the second embodiment of the invention, the stripping roller 11 is replaced by a rotary stripper, in particular an endless conveyor belt, which is wound around a pulley rotating on the shaft of the impeller 01 and two further pulleys. The endless conveyor belt can be driven by the conveyor belt 12 in a similar manner to the stripping roller 11 , wherein the lower of the two pulleys is pressed against the conveyor belt 12 . In this case the pulley must be rotatable relative to the impeller 01 .

In contrast, in the design considered here, the endless conveyor belt is spaced apart from the conveyor belt 12 and the pulley is fixedly connected to the impeller 01 for co-rotation with the impeller. Therefore, the relationship between the rotational speed of the impeller 01 and the rotational speed of the endless conveyor is determined by the radius of the pulley. If this radius is larger, the endless conveyor belt slides over the leading edge of the print 07 during peeling, thereby pressing the print against the blade 02 outside the grid 03 containing the print.

The smaller the diameter of the pulley, the slower the endless belt turns. The speed of the endless conveyor can thus be adjusted in such a way that the same point of the endless conveyor comes into contact with the leading edge of the printed product 07 during the entire detachment process. Any friction between the endless conveyor belt and the printed product 17 during peeling can thus be avoided.

reference sign

01 impeller

02 blades

03 cells

04 Belt conveyor

05 Fan-shaped part of the impeller

06 belt conveyor

07 print

08 brake body, brake roller, brake disc

09 axis

10 peeled scalloped sections

11 Stripper, stripping roller

12 conveyor belt

15 peeled scalloped sections

α opening angle

Claims (19)

1. A device for laying printed matter (07) on a conveyor belt (12), said device having an impeller (01) carrying a large number of blades (02) distributed in the circumferential direction, the blades respectively forming accommodating printed matter (07 ), said device also has at least one brake disc (08), wherein the brake disc (08) has a printed matter (07) swept the braking surface of the impeller (01), wherein the braking surface of the brake disc (08) faces the rotating shaft of the impeller (01), wherein, viewed from the axial projection of the rotating shaft of the impeller (01), the braking disc (08) Arranged to enter each grid (03) with printed matter on the rear end of the blade (02), characterized in that in the grid (03) of the impeller (01) the brake disc (08) passes and is conveyed to the grid (03) The frictional contact of the printed matter (07) in is rotationally driven, wherein the brake disc (08) is set on the lower half of the impeller (01) and is set in front of the lower apex of the impeller (01), and the brake disc (08) Set to overlap the cell (03) in the axial section. 2. The device as claimed in claim 1, characterized in that the brake disc (08) rotates counter-rotating to the impeller (01). 3. The device according to claim 1, characterized in that the overlap between the grid (03) and the brake disk (08) is limited to a radially outer region of the grid (03). 4. The device according to claim 1, characterized in that at least one stripper (11) with a surrounding stripping surface is provided. 5. Device according to claim 4, characterized in that the stripping surface is a surrounding endless conveyor belt. 6. Device according to claim 5, characterized in that the endless conveyor belt is wound around the shaft of the impeller (01). 7. Device according to claim 6, characterized in that the endless conveyor belt turns on the pulley of the impeller (01). 8. The device according to claim 4, characterized in that the stripping surface is the peripheral surface of the stripping roller (11). 9. The device as claimed in claim 1, characterized in that at least two entry points (04, 06) for printed matter (07) are distributed over the circumference of the impeller (01). 10. The device according to claim 1, characterized in that at least two strippers (11, 15) are arranged in the circumferential direction of the impeller (01). 11. The device according to claim 1, characterized in that at least one stripper (15) is provided which is stationary during the rotation of the impeller (01). 12. The device according to claim 1, characterized in that the distance between the rotational axis of the impeller (01) and the rotational axis of the brake disc (08) is variable. 13. The device according to claim 1, characterized in that, viewed from the axial projection of the rotating shaft of the impeller (01), the braking surface of the brake disc (08) and the inner surface of the blade (02) are in the When the braking surface enters the grid (03) of the impeller (01), it has an opening angle of less than 45° in the intersecting area of the braking surface and the inner surface. 14. Device according to claim 13, characterized in that the opening angle is less than 30°. 15. According to the described device of claim 13 or 14, it is characterized in that, from the axial projection of the rotating shaft of impeller (01), the braking surface of brake body (08) or brake disc (08) And the inner side of the blade (02) has an opening angle of less than 15° in the intersecting area of the braking surface and the inner side when the braking surface enters the grid (03) of the impeller (01). 16. The device according to claim 1, characterized in that a plurality of impeller disks (05) are respectively arranged at intervals in the axial direction of the axis of rotation of the impeller (01). 17. The device according to claim 16, characterized in that at least three impeller disks (05) are provided. 18. The device according to claim 16, characterized in that at least one brake disk (08) is arranged in the space between two impeller disks (05). 19. The device according to claim 16, characterized in that, viewed in the axial direction of the axis of rotation of the impeller (01), at least one brake disc (08) is respectively arranged on the outside of the two outer impeller discs (05). ).

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