EP0941956A1 - Device for flexible guiding of moved products - Google Patents

Abstract

The deformation of the flexible guide (7,12) causes an extension of the time lapse during which the guide and the product (1) are in contact with each other. The flexible guide is supported by at least one support (8,15). It can be stationary or movable. For the deformation of the guide an arc-shaped length (11) of it is selected. It is deformable between supports (8,9). The flexible guide passes through a fluid application station where a fluid is applied to its surface. It also passes through a cleaning station where impurities on its surface are removed.

Description

The present invention relates to a device for flexible guidance of transported flat products, especially printed products, if these from a folder to further processing stations.

In conventional delivery systems of web printing presses is for a sudden A major change in the direction of a signature that strikes a fixed guide Impact required. If the signature's impact is too violent, there may be smudges on their surface or on the signature printed ink are rubbed off as it is transported along the guide becomes. The rubbed paint can in turn settle on the guide and on one additional signature are transmitted, which is smeared and thus damaged.

EP 0 662 439 B1 shows a pneumatic sheet guiding device in one Sheet printing machine, which is arranged along a sheet conveying path. The Pneumatic sheet guiding device comprises an upper part with blown air openings and an expandable lower part which is circumferential with the upper part connected is. The upper and lower parts form an airtight cavity. Both parts are made of a flexible material, but the lower part is much more flexible than the upper part. The upper part is flexible and the lower part is expandable in such a way that by blowing air in between the two parts formed cavity forms an air bubble, which causes the lower part of its Curvature changes.

When transferring sheet material, such as. B. signatures, and at Direction change of signatures during high conveyor speeds dips however, the problem arises that the contact and Shear forces can cause a damaging effect. The contact force works in the direction of guidance, while the shear force in the direction of movement of the Signature works.

Normally, with a serve, a constant force exerted from one body to another increases to a very high value in a relatively short time. The average value (F _average ) and the time (Δt) over which the force acts represent the force impulse of the signature (ie force versus time curve) and thus the moment of movement of the signature. It is therefore necessary to measure the effect on one of a path transported signature to reduce impact forces.

With regard to the prior art described above and the associated disadvantages, it is an object of the present invention to provide a device for flexible management of transported products including a flexible one Create guidance to support signatures. The flexible management of the present Invention is able to deform to the time interval in which an impact occurs Extend signature to change direction. The leadership is on stored at least one support. The device for flexible guidance of transported products is particularly useful in delivery components of a Folders or in folders generally.

The device according to the invention has the advantage that the signature applied Average impact can be reduced by the time interval in which the collision between the signature and the leadership takes place, is extended. Thus, the markup can be significantly weakened, because the collision of the signature with the leadership, the signature taking its direction changes, can take place at a longer interval.

According to a further embodiment of the present invention, the flexible Leadership can be either stationary or dynamic. Both types of leadership can deform to impact force when the signature hits the guide to absorb. The stationary flexible guide can be curved Deform length. The deformation of the flexible guide can still be favored by placing it between two supports, each on a different level are arranged.

According to the present invention, flexible guidance can be any desired Form and width, they can also be the width of the signature or a larger width exhibit. Between the signature and an impervious surface of the flexible Leadership can form a natural cushion of air. The flexible leadership can also work out permeable material to be constructed so that compressed air through the flexible guide can be blown to promote the formation of an air cushion.

According to a further embodiment of the present invention, the Device according to the invention not as a stationary flexible guide, but as an endless loop arranged in the direction of the respective signature emotional. With this construction, no shear forces develop between the signature and flexible leadership. If the speeds of the signature and the dynamic flexible guidance are adapted to each other so that no difference exists, a more even signature management is achieved with the shear forces excluded are. The dynamic flexible guide is as a closed loop constructed and can be supported by roller-shaped supports, so that a Relative movement of the guide with respect to the support rollers is possible. For the movement The dynamic flexible guide can be at least one drive station be assigned. In one embodiment of the invention, the drive station Press rolls on that cooperate with each other by providing dynamic flexible guidance wind along their path of movement.

Furthermore, the device and the method according to the present invention can be a Liquid application station include where a liquid, e.g. B. silicone is applied, to reduce the friction factor and consequently prevent lubrication points. It Antistatic liquids can also be applied, which are static Reduce the attraction between the guide and the signatures. At long last a cleaning station can be assigned to the dynamic flexible guide in order to Remove impurities from the surface of the dynamic flexible guide and permanently prevent color build-up.

In a further exemplary embodiment of the present invention, a method for the creation of a flexible guide represented by at least one prop is worn and deformed by the addition of a signature, so that the Period in which the direction change of the signature takes place is extended and thus the forces acting on the signature on average are reduced. The dynamic flexible guidance can be driven in such a way that the Speed difference between the signature and the dynamic flexible guidance is minimized.

The features of the present invention will become apparent in the following description preferred embodiments in connection with the accompanying, below listed drawings explained in more detail.

Fig. 1A und 1B

jeweils eine perspektivische und eine Seitenansicht einer herkömmlichen ortsfesten Führung;

Fig. 2

eine Seitenansicht einer stationär angebrachten flexiblen Führung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;

Fig. 3

eine Seitenansicht einer dynamischen flexiblen Führung, die in einer geschlossenen Schlaufe angeordnet ist und zugeordnete Antriebsstationen gemäß einem Ausführungsbeispiel der vorliegenden Erfindung aufweist; und

Fig. 4

eine Seitenansicht einer dynamischen flexiblen Führung mit einer Flüssigkeitsauftragstation sowie einer Reinigungsstation für die Oberfläche der flexiblen Führung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung.

Show it:

1A and 1B

a perspective and a side view of a conventional fixed guide;

Fig. 2

a side view of a stationary mounted flexible guide according to an embodiment of the present invention;

Fig. 3

a side view of a dynamic flexible guide, which is arranged in a closed loop and has associated drive stations according to an embodiment of the present invention; and

Fig. 4

a side view of a dynamic flexible guide with a liquid application station and a cleaning station for the surface of the flexible guide according to an embodiment of the present invention.

1A and 1B show a conventional stationary guide 4 on which one Signature 1 is promoted. A respective signature 1 has a leading edge 2 and a Trailing edge 3 and moves in the direction indicated by arrow 6. The The rear edge 3 of the signature 1 swings due to the centripetal or approach forces outwards until it contacts the stationary guide 4. However, this will make the Signature 1 is subjected to a force such that the signature 1 adapts to the shape of the adapts stationary guide 4. When signature 1 strikes the stationary one Guide 4 becomes a very fast and strongly increasing force on the signature 1 exercised, which can damage the latter.

Fig. 2 shows a stationary attached flexible guide 7 according to a Embodiment of the present invention. A signature is with your Leading edge 2 by a delay drum on one of several arms (Not shown) attached gripping element is held, guided in the direction 6. This can e.g. B. may be a delay drum as disclosed in US 5,452,886. It an axis about which the deceleration drum rotates can be selected so that during the rotary movement the gripping elements follow a path that is in one predetermined distance from the surface of the flexible guide. Since the Front edge is held by the gripping element, this does not hit the flexible Guide 7 when the signature slows down as it moves in that direction becomes. However, the body of the signature 1 resonates due to the centripetal forces outside and hits on the stationary flexible guide 7.

The flexible guide 7 is between an upper support 8 and a lower support 9 arranged. The supports 8 and 9 are each on different levels. The flexible guide 7 moves into an arcuate position due to gravity. The arc length between the two supports 8 and 9 is 11 designated. The flexible guide 7 deforms on contact with a respective one Signature 1, so that signature 1 is granted more time, in accordance with its impulse to transmit an average force to the flexible guide 7 (i.e. that the The time interval of the service is extended and thus the average force for one given momentum is reduced). The shape of the flexible guide 7, which is between the two supports 8, 9 hanging hanging, can be changed by changing the length of the flexible Guide 7 can be varied.

The freely hanging arcuate length 11 of the two supports 8, 9 Guide 7 influences the deformation and consequently the contact forces exerted thereon. Furthermore, the degree of deformation and thus the degree of elongation of the Time interval by choosing a material for the guide that is the most suitable Possesses properties, be changed. A guide from a lighter, more flexible Material will adapt more easily to the shape of the signature 1 to be kept, whereas a guide made of a heavier, less flexible material causes the signature, react faster to serve 7 when serving.

Fig. 3 shows a dynamic flexible guide 12, which is in a closed loop is arranged with assigned drive stations. In this embodiment the Invention, the flexible guide 12 is mounted on a plurality of support rollers 14. The Rollers can each be arranged on supports 15, 16. The flexible guide 12 that is designed as a closed loop, moves into one through the arrow 13 indicated direction, which corresponds to the direction of movement of the signature 1. Of the closed loop is assigned at least one drive station 17, 23 to the flexible guide 12 to move the rollers 14 at a speed that the Speed of the signature can be adjusted so that a Speed difference between the signatures 1 and the surface of the flexible Leadership 12 can be avoided. The elimination of a speed difference between the signatures moved at a distance and the speed of the Guide prevents lubrication points on the signatures and ensures one smooth signature transport.

According to a further exemplary embodiment of the present shown in FIG. 3 The flexible guide 12 can have two drive stations 17 and 23 according to the invention be equipped. The drive station 17 is the lower end of the flexible guide 12 assigned after the latter has rotated around the roller 14, and the Drive station 23 is assigned to the upper end of flexible guide 12. A additional tension roller 14 can be arranged in the lower right corner, which the flexible guide 12 between the drive stations 17 and 23 spans and the shape of the flexible guide 12 on the arcuate portion of their career is not affected. The drive stations 17 and 23 can each comprise a pair of press rolls 18, 19, who cooperate with each other. The press roll 19 rotates in the direction 20 and Press roll 18 rotates in the direction 21. Both drive stations 17 and 23 for the flexible guide 12 are operated synchronously so that it is moved continuously.

As in connection with the embodiment of the invention shown in FIG. 2 was mentioned, the material properties of the flexible guide 12 determine the degree the deformation of the flexible guide 12. A light, flexible material fits the The shape of the signature is lighter and a heavy, less flexible material forces it Signature to adapt to leadership more quickly. The material can be permeable (i.e., it can be made from a plurality of spaced strips, e.g., nylon or consist of a flexible grid) or it can be impermeable (i.e. it can Bow of a fabric-like material such as nylon). Anyone can use this material desired width, it can also be wider than the signature or as wide as these be.

As described above, a signature 1 can be gripped by a gripping member (not shown) on its leading edge 2 and moved by a deceleration drum (not shown) to move along the flexible guide 12 according to the present invention. Between the upper and lower supports 15 and 16, the flexible guide 12 assumes an arcuate shape while being moved at the same speed as the signature 1. Thus, no significant differences in speed between the moving surface of the flexible guide 12 and the incoming signature 1 appear. Consequently, due to the reduction in the relative movement between two surfaces, the signatures cannot be smeared. With the reduction in the speed difference, the effect of the shear forces is also significantly reduced. Upon contact with the flexible guide 12, a contact force develops between the flexible guide 12 and the respective signature 1, which is normally directed towards the flexible guide 12. The impact force to which a signature received by the flexible guide 12 is exposed corresponds to an impulse force which is equal to 1 F _average x Δt (ie the product of an average force (F _average ) multiplied by the time interval of the impact (Δt)). To reduce the average force to which the signature is exposed for a given pulse, the time interval of the collision is extended. This is achieved by deforming the flexible guide 12 during the collision with a respective signature 1. The flexible guide 12 follows the shape of the incoming signature 1 and takes this form, the time interval Δt in which the contact between the signature and the flexible guide 12 takes place is extended. Thus, the average force exerted on the signature 1 is significantly reduced.

As already mentioned, the degree of deformation of the flexible guides 7 and 12 depends for example on the properties of the selected material for these guides. In a design of the flexible guide 12 in a width that the width of the corresponds to the respective signature to be conveyed 1 or is wider than this, and at Using an impermeable material for the touch becomes a natural one Air cushion created between the surface of the flexible guide and the signature 1. For example, additional air can be blown into the area between by means of a fan 34 the signature and the guide 7 are introduced. Between the surface of the flexible guide 12 and the signature 1 so there is trapped air, so that thereby a direct contact between the surfaces of the signature 1 and the flexible Leadership 12 is avoided. The effect of this between the signature 1 and the Surface of the flexible guide 12 trapped air is of course from the Speed of signature and centripetal forces during the Revolution of the one arm of a deceleration drum (not shown) or one other suitable delay device connected gripping elements on the Signature 1 are exercised, depend.

In another embodiment, the guide can be made of an impermeable Material that has a selected number of air holes 37, or from one permeable material. The air between the moving Signature 1 and the surface of the flexible guide 12 can by means of a Blower device 35 are pressed out through the permeable surface, the Blower device 35 via a selectively created guide channel 36 with a cavity communicates with the guide and the cavity except for the air holes 37 is airtight.

Fig. 4 shows a further embodiment of the dynamic according to the invention 3, which is a liquid application station 24 and a Includes cleaning station, which are integrated into the track of the flexible guide 12. The liquid application station 24 has a liquid container 26 which, for. B. liquid Contains silicone 25. A rotating liquid application element 27, e.g. Legs Dip roller, applies the liquid to the surface of the flexible guide 12.

By applying silicone before a signature 1 the surface of the flexible Guide 12 contacted at high speeds, the Significant coefficient of friction. At high speeds processed signatures the generated air cushion between the signature 1 and the Surface of the flexible guide 12 is not sufficient to prevent direct contact. Thus, the effects of direct contact between the signature and the flexible guide 12 minimized by reducing the coefficient of friction. This is, however, more important for a stationary flexible guide 7, as shown in FIG. 2, than for a dynamic flexible guide 12 which is driven and in which none Differences in speed occur. The liquid application station 24 is behind one upper drive station 23 arranged to a freshly applied, very thin To produce coating of the surface of the flexible guide 12. In addition to liquid silicone or a silicone solution can be an antistatic solution within the Liquid application station 24 can be used to increase the static attraction between the two moving elements, namely the signature 1 and the to reduce flexible guidance 12.

A cleaning station 29 is located at the lower end of the flexible guide 12, after it has passed a lower drive station 17. The cleaning station 29 comprises two guide rollers 30 which deform the flexible guide 12 so that one sufficient contact length is guaranteed along the surface of the flexible Guide 12 can be cleaned by means of a cleaning brush 31 or the like. The Cleaning brush 31 is assigned to a container 32 which is a cleaning solution contains to remove contaminants on the surface of the flexible To facilitate leadership 12.

The present invention also discloses a method for guiding transported Products. The flexible guides 7 and 12, as shown in Figs. 2-4, are carried by at least one support 8, 15 and the material properties are so chosen that the flexible guides 7, 12 are deformable to the time interval of To extend the surcharge for a respective signature 1. Doing so will be strong Contact forces that occur during the collision between two moving bodies exercised and directed towards the leadership, eliminated. According to the Method of the present invention, the flexible guide 12 is driven such that no speed differences between the signatures 1 and the surface the flexible guide 12 arise. Thus, shear forces are between themselves moving bodies eliminated or significantly reduced.

LIST OF REFERENCES

1

signature

2nd

Front edge of the signature

3rd

Trailing edge of the signature

4th

stationary leadership

6

arrow

7

stationary flexible guidance

8th

support

9

support

11

arcuate length of the guide 7

12th

dynamic flexible leadership

13

Directional arrow

14

Back-up rolls, tensioning roll

15

carrier

16

carrier

17th

Drive station (Fig. 3)

18th

Press roll

19th

Press roll

20th

Direction of rotation of the press roller 19th

21

Direction of rotation of the press roller 20

23

Drive station

24th

Liquid application station

25th

liquid silicone

26

Liquid container

27

Dipping roller

29

Cleaning station

30th

Guide rollers

31

Cleaning brush

32

Cleaning solution container

34

fan

35

Blowing device

36

Lead channel

37

Air holes

Claims (21)

Device for flexibly guiding transported products, with a flexible guide (7, 12) which supports a transported product (1),
wherein the flexible guide (7, 12) is deformable during a collision between itself and the transported product (1) by a time interval in which the flexible guide (7, 12) is in contact with the transported product (1) extend, and wherein the flexible guide (7, 12) is supported by at least one support (8, 15). Flexible guiding device according to claim 1,
characterized,
that the flexible guide (7, 12) is a stationary guide. Flexible guiding device according to claim 1,
characterized,
that the flexible guide (7, 12) is a moving guide. Flexible guiding device according to claim 2,
characterized,
that a length of the same is chosen for the deformation of the flexible guide (7). Flexible guiding device according to claim 2,
characterized,
that an arcuate length (11) of the same is chosen for the deformation of the flexible guide (7). Flexible guiding device according to claim 2,
characterized,
that the flexible guide (7) between supports (8, 9) is deformably attached. Flexible guiding device according to claim 1,
characterized,
that the flexible guide (7, 12) has an identical width to or wider than the width of the transported product (1), so that there is an air cushion between the impermeable surface of the guide (7, 12) and the transported product (1 ) can form. Flexible guiding device according to claim 1,
characterized,
that the flexible guide (7, 12) is permeable, so that an air cushion can be formed between the permeable guide surface (7, 12) and the transported product (1) by means of compressed air. Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) is an endless loop that moves in the direction (6) of the transported product (1). Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) is driven as an endless loop with a surface speed that is approximately the speed of the transported product (1). Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) has a closed loop and is mounted on supports (15, 16) designed as rollers (14). Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) is driven by at least one drive station (17, 23). Flexible guiding device according to claim 12,
characterized,
that the at least one drive station (17, 23) comprises cooperating press rolls (20, 21) through which the flexible guide (12) is wound in the direction of movement of the transported product (1). Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) passes a liquid application station (24) through which a liquid is applied to the surface of the flexible guide (12). Flexible guiding device according to claim 3,
characterized,
that the flexible guide (12) passes a cleaning station (29) through which contaminants are removed from the surface of the flexible guide (12). Flexible guiding device according to claim 14,
characterized,
that the liquid applied is a silicone solution. Flexible guiding device according to claim 14,
characterized,
that the liquid applied is an antistatic solution. Flexible guiding device according to claim 14,
characterized,
that the transported product (1) is a printed signature. Folder with a flexible guide (7, 12), which is a transported product supports, the flexible guide (7, 12) during a collision between itself and the transported product (1) is deformable to a Time interval in which the flexible guide (7, 12) with the transported Product (1) is in contact, and the flexible guide (7, 12) is supported by at least one support (8, 15). Method for carrying a transported product, comprising the following steps:
Supporting a flexible guide by at least one support; Transporting the transported product for flexible guidance; and extending the time interval for the change in direction of the transported product by means of a deformation of the flexible guide. Method for guiding a transported product according to claim 20,
characterized,
that the flexible guide is movable in a closed loop and driven in such a way that a speed difference between the transported product and the flexible guide is minimized.

Images