EP2088104B1 - Device for redirecting individual printed items - Google Patents

Abstract

The device (1) has a medium (6) for implementing a rotational translatory movement, where the printed products are collected during the rotational translatory movement by the respective medium. A transport device (A) is provided, by which the printed products are fed in a direction (4). The medium has a gripper (28), with which the printed products are clamped on a lower side and an upper side respectively during the rotational translatory movement.

Description

The invention relates to a device for deflecting horizontally fed printed products by a predetermined angle with a rotational translational movement, with means for performing the rotational translational movement, wherein the printed products are each detected during the rotationalatranslatorischen movement by the means, and with a first transport device through which the printed products can each be fed to the means in a first direction and with a second transport device with which the deflected printed products can be transported in a second direction. In this case, the means have a gripper with which the printed products during the rotational translational movement in each case on the underside and top side are clamped, wherein the gripper is a mechanical gripper with a lower part and an upper part, between which the deflected printed product during the rotational translational movement can be clamped ,

Devices of this type are known in the further processing of graphic printed products. They serve to transport in a continuous processing of these printed products, which are usually precursors, so that they change the conveying direction. This happens, for example, with so-called corner deflections, which can be supported for clock-accurate deflection, for example, by an impulse. With increasing processing speed, however, such shock-like deflections become problematic. In particular, you can The printed products are upset at the deflection, bounce back, jump or twisted. Therefore, efforts have long been underway to gently decelerate the printed products in the original transport direction and to accelerate them in a controlled manner in the new transport direction.

In the prior art is by the EP-A-0 738 682 a device of the type mentioned has become known, which serves for the rapid feeding of supplements arches to a pushing device of a packaging machine. This device has two rotating discs, each having a sucker. With these suckers, the sheets are sucked in each case on the underside and deflected with unchanged orientation as possible on a circular arc of 90 degrees. With a rotationally translational movement, the sheets are continuously decelerated in the original conveying direction and simultaneously accelerated in the new conveying direction. This device has the disadvantage that the deflection radius and the possible minimum format of the supplied sheets are coupled. For a smooth deflection at high speeds, a large deflection radius is desired. For proper processing of the smallest possible bow but small discs are needed. Otherwise, the sheets would only be covered by a suction, so that they could no longer be held and guided clearly. Another disadvantage is that the deflected sheet with the suckers are detected only on one side. This is particularly problematic in extensive multi-layered sheet, as inner parts of the sheet can not be held and can move in a deflection relative to the outer side.

Another device of the type mentioned is by the GB 2139196 A known. In this solution, the means for carrying out the rotational translational movement on a mechanical gripper with a lower and an upper gripper plate, between which the deflected print product is clamped during the rotational translational movement.

The invention is based on the object to provide a device of the type mentioned, which avoids the disadvantages mentioned.

The problem is solved in a generic device in that

the upper part of the gripper is designed as an arm, which is pivotally mounted at a first end and has gripping means at a second end, which can be lowered onto the latter for detecting the printed products. Preferably, according to an embodiment of the invention, these gripping means are movable and arranged in particular rocking on the arm. As a result, several and in particular two gripping points are possible in which compensate for the holding forces respectively by the movable or rocking mounting of the gripping means.

With the device according to the invention thus higher powers are possible without the printed products are damaged in the deflection, for example, be compressed, or that they bounce back, jump away or twisted. The device is particularly suitable in graphic processing for producing, for example, newspapers, brochures, books and the like.

According to a development of the invention it is provided that the gripper is arranged on a circular parallel gear. In particular, it is provided that the gripper is mounted on two rotatably driven in the same direction discs. This allows a fast and at the same time precise movement of the gripper during the rotational translational movement.

According to a development of the invention, it is provided that the gripping means has at least one and preferably two gripping points arranged at a distance from one another, which or which can be applied to the said upper side. Preferably, this gripping point or these gripping points are formed elastically. As a result, an automatic adaptation to different thicknesses of the printed products is possible. The gripping points can be formed for example of rubber-elastic knobs. The distance between two gripping points can be comparatively small, for example a few cm. As a result, printed products with a small format as well as printed products with a large format can be captured more safely.

According to one embodiment of the invention, the gripper is controlled, for example by a curve so that the printed products are detected and released in each case in predetermined positions. In particular, it is provided that said upper gripper part is controlled by a curve.

According to a development of the invention it is provided that the curve is mounted with a fixed orientation. In particular, the curve is mounted on a rotatable disc of a parallel transmission. During each revolution of the disc, the gripper is opened and closed according to the curve. As a result, a particularly precise gripper movement is possible.

Further advantageous features emerge from the dependent claims, the following description and the drawings.

Fig. 1

eine räumliche Ansicht einer erfindungsgemässen Vorrichtung,

Fig. 2

eine weitere räumliche Ansicht der erfindungsge- mässen Vorrichtung,

Fig. 3 - 5

Draufsichten auf die erfindungsgemässe Vorrich- tung in unterschiedlichen Positionen eines Tak- tes,

Fig. 6

ein Schnitt entlang der Linie VI - VI der Figur 4,

Fig. 7

ein Schnitt entlang der Linie VII - VII der Fi- gur 3 und

Fig. 8

ein Schnitt entlang der Linie VIII - VIII der Figur 3.

An embodiment of the invention will be explained in more detail with reference to the drawing. Show it:

Fig. 1

a spatial view of an inventive device,

Fig. 2

a further spatial view of the device according to the invention,

Fig. 3-5

Top views of the inventive device in different positions of a clock,

Fig. 6

a section along the line VI - VI of FIG. 4 .

Fig. 7

a section along the line VII - VII of Figure 3 and

Fig. 8

a section along the line VIII - VIII of FIG. 3 ,

The device 1 has a substantially rectangular frame 2, which has a substantially flat and horizontal bottom plate 3. It serves to redirect printed products 60, for example 90 degrees, like the FIG. 3 shows. With an arrow 4, the direction is indicated, in which the isolated printed products 60 of the device 1 are supplied. An arrow 5 shows the direction with which the 90 ° deflected printed products 60 'are transported away. The printed products 60 may be any printed products of graphic arts processing, and thus, for example, individual sheets, sheets, or the like for making, for example, magazines, newspapers, books, and the like. The supply of the printed products 60 takes place with a first transport device A and the removal with a second transport device B. Both transport devices A and B are preferably designed so that they can be adjusted or adapted to different formats of the printed products 60 and also to different thicknesses of these printed products ,

The first transport device A has according to FIG. 2 lower conveyor belts 18 and upper endless conveyor belts 19. These conveyor belts 18 and 19 are each driven by shafts 10 and 11 and deflected to rollers 20 and 21. The rollers 20 and 21 are adjustable on a bearing plate 22 (FIG. FIG. 1 ) stored. Adjustable conveyor belts are known in the art and are therefore not explained here. Instead of conveyor belts 18 and 19 but other suitable means of transport are conceivable. The printed products 60 detected by the conveyor belts 18 and 19 rest on baffles 14 and 15 during transport. These baffles 14 and 15 are designed to guide printed products 60 of each size size. Correspondingly, printed products of a smaller size take up a smaller proportion of the surfaces of these baffles 14 and 15. The bands 18 and 19 are arranged, as can be seen, between these baffles 14 and 15. In addition, the baffle 14 is longer than the other baffle 15, in particular the FIG. 1 shows. The first transport device A can thus transport printed products 60 with different formats.

The second transport device B serves to remove the deflected printed products 60. It has according to FIG. 8 a lower band 48 and a first upper band 49 and a second upper band 50. For storage of these bands two parallel and spaced apart bearing plates 45 and 46 are provided, in particular the FIG. 2 shows. The bands 48 and 50 are according to the FIG. 2 powered by waves 12 and 13. In addition, this second transport device B has another band 17, which is arranged at a distance from the band 48 is and which is also driven by the shaft 12. This band 17 extends within a slot 70 (FIG. FIG. 5 ) of a guide plate 16. During transport by means of the second transport device B are the printed products 60 on the baffle 16 on. The overdrive from the lower band 48 to the first upper band 49, which are formed as a toothed belt, takes place with the in FIG. 1 The meshing gears 56 and 57 are shown meshing with each other. The lower gear 56 is connected to the deflection wheel 58 shown in FIG FIG. 8 shown drive wheel 59 connected.

The second upper band 50 has a deflection roller 53, which is horizontally adjustable for adjusting the effective length of this band 50 in the directions of the double arrow 55. To move the bearing plate 46 has a horizontal slot 47. For the removal of the printed products 60, these are detected in the region of a leading edge 60a between the guide roller 53 and the belt 48 and the guide plate 16.

The first upper band 49 has on an outer side a projecting cam 51, which is preferably designed resilient. For example, the cam 51 is made of a rubber-elastic material. The band 49 is driven in the direction of the arrow 52. The in FIG. 8 shown cam 51 thus passes into a gap 71 and thereby presses a detected printed product 60 at the top. Since the cam 51 acts elastically, this can adapt to different thicknesses of the printed products 60. The time at which the cam 51 enters the gap 71 and thus detects the printed product 60 is adapted to the time at which the Printed product 60 enters the intermediate space 71 and is released by the gripper 28.

Between the first transport device A and the second transport device B deflection means 6 are arranged, with which the printed products 60 taken over with a rotational translational movement of the first transport device A and the second transport device B can be supplied. The printed products 60 are transported over a step and reach from a higher to a lower level. The higher level is defined by the tops of the two baffles 14 and 15 and the lower level by the top of a gripper lower 66. In essence, the lower level also corresponds to the upper side of the guide plate 16. The deflection of the printed products 60 takes place in the inventive device 1 by 90 degrees. In principle, however, all deflection angles between 0 degrees and 180 degrees are possible here. Since the printed products 60 are guided over a step, an overlap between the incoming printed products 60 and the redirected or deflected printed products 60 is possible. During the deflection, the printed products 60 retain their orientation. The diversion is also clocked. The clock and the orientation thus remain at the redirection.

The deflection means 6 have a first disc 23 and a second disc 24, each in the same directions according to the arrows 61 and 62 of the FIG. 3 are driven. Both discs 23 and 24 each have on their underside a gear 25 and 26 which are connected via a smaller gear 26. The gear 25 is according to the FIG. 6 connected via a toothed belt 72 with a shaft 8 of a transmission 7. The two discs 23 and 24 form a parallel gear with a gripper 28. About the gear 7 and the first transport device A and the second transport device B are driven simultaneously with this parallel transmission. The gripper 28 thus operates synchronously with the two transport devices A and B. The discs 23 and the second disc 24 and the gear 26 are rotatably mounted on the bottom plate 3 at 42, 43 and 44.

The gripper 28 has a gripper lower part 66, which according to the FIGS. 6 and 7 each connected to a bearing 67 with the disc 24 and a bearing 68 with the disc 23. The gripper lower part 66 thus extends between the two discs 23 and 24. In all positions, the gripper lower part 66 is aligned transversely to the transport direction of the first transport device A. The top of the gripper lower part 66 is located below the top of the baffles 14 and 15, whereby the said step is formed. The gripper lower part 66 is in each case moved in such a way that the printed products 60 supplied with the first transport device A can reach this gripper lower part 66.

The gripper 28 also has an arm 35 which forms a gripper head with a gripper head 38. The arm 35 is mounted with a pivot bearing 73 on a vertical axis 30, which in turn is mounted with a bearing 68 on a plate 37 which is fixedly connected to the gripper lower part 66. On the plate 37, a bolt 33 is fixed at a distance from the axis 30, on which a spring 34 is arranged, which rests on a lever 36 of the arm 35. By the pressure of this spring 34, a roller 32 is pressed against a cam 31 of a cam 29. The Roller 32 is seated on the arm 35 at a distance from the axis 30. The axis 30 is arranged at a distance from a bearing 42, which forms the axis of rotation of the first disc 23. If the first disk 23 rotates, then the axis 30 rotates about the bearing 42 or the corresponding axis. The roller 32 moves in one cycle, the control cam 31 each from 360 degrees. According to the course of the curve 31, the arm 35 is pivoted so that the rapier head 38 between the in the FIGS. 6 and 7 shown positions is moved up or down.

In the position according to FIG. 6 the gripper head 38 is pressed from above against the gripper lower part 66. In the in FIG. 7 shown position of the gripper head 38 is lifted from the gripper lower part 66. In the position according to FIG. 6 For example, a printed product 60 can be clamped between the gripper lower part 66 and the gripper head 38 and thus held firmly in place. In order to keep the printed product 60 particularly stable, the gripper head 38 has underside spaced-apart parts 41, which are designed in particular as rubber-elastic downwardly projecting cams. These two parts 31 are thus in a clamped pressure product 60 on this upper side elastic and press it against the gripper lower part 66th

The curve 31 is formed so that the gripper 28 in the area between the in FIG. 4 shown dotted lines 64 and 65 is closed. When the gripper 28 is moved in this area, the discs 23 and 24 are moved substantially 90 degrees. The clamped printed products 60 are thus braked in the direction of arrow 4 and accelerated in the direction of arrow 5.

The two transport devices A and B and the deflection means 6 are synchronously driven by the transmission 7 as explained above. In principle, however, a design is conceivable in which the two transport devices A and B and the deflection means 6 are each driven by a synchronous motor, not shown here. This makes it possible, in particular, to adapt the timing of the printed products 60 from the first transport device A to the second transport device B. Here, sensors (not shown), for example photocells, can be provided which detect the cadence and phase position of the incoming printed products 60. Due to corresponding signals of these sensors, corresponding speed corrections for the deflection of the printed products 60 can be triggered in a control. The drive of the deflection means 60 may be formed, for example, as a limping drive, so that an adaptation to the speeds of the first transport device A and the second transport device B is possible. Such a limping drive can be realized for example by means of a servomotor and a so-called "electrical curve".

The operation of the inventive device 1 will be explained in more detail.

The individual phases, which pass through a printed product 60 during the deflection, result in particular from the Figures 3 - 5 , In the phase according to FIG. 3 a printed product 60 is transported with the first transport device A in the direction of the arrow 4, wherein a leading edge 60a is already in the region of the two discs 23 and 24. side edges 60b and 60c are aligned parallel to the transport direction according to arrow 4. The leading edge 60a thus extends transversely to the transport direction. The gripper 28 is opened according to FIG. 7 and is located immediately in front of the leading edge 60b. Due to the rotational movement of the discs 23 and 24, the gripper 28 moves in FIG. 3 a quarter circle to the right. As a result of the simultaneous movement of the printed product 60 in the direction of the arrow 4, the printed product 60 now reaches the region of the rapier head 38. The gripper 28 is now in its reach until reaching the position indicated in FIG FIG. 5 closed position shown.

In the phase of FIGS. 3 to 4 the printed product 60 is clamped between the gripper lower part 66 and the gripper head 38. Due to the clamping between the two spaced apart parts 41, the printed product 60 can now be moved with a rotationally translational movement in the position shown in Figure 5. The printed product 60 is here in the region of the leading edge 60a in the region of the second transport device B. Essentially simultaneously with an opening of the gripper 28, the printed product 60 is detected by the cam 51 of the first upper band 49 and the lower band 48 and now linear in Direction of the arrow 5 moves for removal. The edge 60b is thus now the leading edge. A leading print product 60 'has according to FIG. 5 the second transport device B already left and is transported in the direction of arrow 63 with a further transport device not shown here. The printed product 60 'can be supplied, for example, to a cutting machine, a book binding machine or a collecting line.

Claims (7)

1. A device for redirecting horizontally fed printed products (60) through a predetermined angle with a rotary-translatory motion, said device comprising means (6) for executing the rotary-translatory motion, in which case said printed products (60) are each seized during the rotary-translatory motion by said means (6), and comprising a first conveying device (A), by which the printed products (60) can each be fed to the means (6) in a first direction (4), as well as a second conveying device (B), by which the redirected printed products (60) can be conveyed in a second direction (5), the means (6) including a gripper (28) by which, during the rotary-translatory motion, the printed products (60) can each be clamped on the underside and upper side, and said gripper (28) being a mechanical gripper comprising a lower portion (66) and an upper portion (38), between which the printed product (60) to be redirected can be clamped during the rotary-translatory motion, characterized in that the upper portion of the gripper (28) includes an arm (35) which at a first end is pivot-mounted on an axle (30) and at a second end has gripping means (38) which can be lowered onto each of the printed products (60) for seizing said printed products (60).
2. A device according to Claim 1, characterized in that the gripper (28) is mounted on a rotating parallel gear unit (23, 24, 26).
3. A device according to Claim 1 or 2, characterized in that the gripping means (38) are mounted on the arm (35) in such a way that they can move and in particular can tilt.
4. A device according to one of Claims 1 to 3, characterized in that the gripping means (38) have at least one gripping point (41), and preferably two gripping points (41) located at a distance from one another, which can be placed on the upper side of the printed product (60) to be seized.
5. A device according to Claim 4, characterized in that the at least one gripping point (41) is designed to be flexible so as to adapt to different thicknesses of the printed products (60).
6. A device according to one of Claims 1 to 5, characterized in that the gripper (28) is controlled by a cam (31).
7. A device according to Claim 6, characterized in that the cam (31) is mounted with fixed orientation on a disk (23) of the parallel gear unit (23, 24, 26).

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