EP2065212A2 - Device to transfer a book cover from a rolling device to a transfer point - Google Patents

Abstract

The device (19) has a guided transport element i.e. suction beam (20), movable forward and backward over a transport stroke and non-positively taking hold of a case (1) exiting a roll-down apparatus (16) during synchronous speed movement. A transport element drive unit (22, 23, 23a) responsive to a control profile is variable in dependence on a format height referred to a transport direction. The drive unit produces a uniform end position of the transport element at a hand-over point (31), and a changing transport stroke commensurate with the format height.

Description

The invention relates to a device for transferring an assembled from cardboard and / or cardboard blank and a cover book cover from a formed from a utility cylinder and at least one pressure roller, the glued reference benefits and the blanks interconnecting Anrolleinrichtung to a transfer point, from which the book cover an impact - And Andrückvorrichtung for driving overhanging reference benefit edges can be fed clockwise, with a back and forth movable, emerging from the Anrolleinrichtung book cover with substantially synchronous motion frictionally engaging transport element.

Such transfer devices are used in book covers machines with a horizontal processing principle in which, when continuously conveyed, cover boards and a back insert are matched in a passable manner with the reference benefits provided in the take-up device by adhesive [ Dieter Liebau, Inés Heinze / Industrial Bookbindery / Verlag Beruf + Schule / 2001 / p. 440 ff ]. The protruding edges of the book cover are taken in successive workstations either in a flowing pass or at a standstill, ie in intermittent passage of the book cover.

For book cover machines with intermittent passage through the impact stations (see DE 100 57 602 A1 ), the transfer of the book cover is such that the transport element is first synchronized to the predetermined by the Anrolleinrichtung exit speed of the book cover, then move in synchronous movement with the book cover, taking it by means of sucker the book cover, and finally, after the book cover completely off the Anrolleinrichtung has escaped, to promote the first impact station upstream, eg overlying transfer point. After the transfer of the book cover to the transport system of the wrapping and pressing the transport element returns with a return movement to its original position.

In order to reliably detect, in particular, book covers with a small format height in the conveying direction, the synchronous movement must already be present at the smallest possible distance from the roll-on device. On the other side is the relatively slow synchronous movement as long as a book cover with a large format height is still trapped between the utility cylinder and the pressure roller. In the usual formate height range to be processed on book cover machines, this results in a minimum cycle time for the transport element, which also no longer permits a clock power increase of the book cover machine, even if maximum permissible positive and negative accelerations and extremely short transfer times are implemented. On the other hand, a format extension would reduce the maximum clock speed for all bookcase formats. Due to the heavy load due to high accelerations and speeds, the mechanical elements of the multi-element curve and / or linkage are subject to increased wear, which leads esp. To inaccurate transfer to the impact station.

The invention has the creation of a device of the type mentioned in the task, which allows for proper transfer of book covers an increase in performance and / or format extension of the book cover machine.

This object is achieved by a device having the features of claim 1. Advantageous further developments of the device according to the invention will become apparent from the dependent claims.

The fact that the device comprises a drive unit which can be acted upon by a variable depending on the oriented in the conveying direction format height control profile, wherein a defined end position of the transport element in the transfer point and a changing delivery stroke are provided, can significantly reduce the necessary cycle time for the actual forward and backward movement of the transport element can be achieved. The respective control profile can be (time) optimized in relation to the respective height format of the book cover. The extreme transport conditions in small and large format no longer have to be considered simultaneously in the movement profile of the transport element and thus in the control profile of the drive unit. The saved cycle time can be used for a longer transfer time in the transfer point, a format extension and / or a clock power increase, with max. allowable accelerations are safely adhered to, which is a low-wear operation of the transfer device and a proper transfer of book covers expedient.

Preferably, the delivery stroke decreases with increasing format height. Thus, for book covers with a small format height, a maximum delivery stroke is provided for acceptance the respective book cover immediately behind the Anrolleinrichtung, while with a larger format height of the delivery stroke is reduced so that the book cover is almost taken only immediately before its complete exit from the Anrolleinrichtung.

An advantageous and therefore preferred development of the device according to the invention can be characterized in that the respective control profiles have substantially the same first and second movement sections for synchronization or for synchronous movement of the transport element with the emerging from the Anrolleinrichtung book cover.

A third, variable-displacement movement section can be configured in compliance with predefinable, positive and negative maximum accelerations to the effect that the shortest possible transport time results. Thus, in particular after the complete emergence of a book cover with a small format height, the transport element can be accelerated beyond the synchronization speed defined by the roll-on device, to significantly shorten the transport time for the maximum delivery stroke required for the small format.

An advantageous and therefore preferred development of the device according to the invention may be characterized in that at least two different control profiles for the drive unit are prepared, which are each assigned to a specific range of format height. Only when the format limits are exceeded must you change to another control profile. In an advantageous manner, the definition of the respective control profile takes place via a connection of the drive unit to a control unit. With the format height known therein, the respective control profile can be set automatically and the drive unit acted upon.

An advantageous and therefore preferred development of the device according to the invention may be characterized in that the drive unit has a drive separate from the Anrollinrichtung and the first following impact station. The drive unit preferably comprises a servomotor and at least one spindle, toothed belt, chain or the like acting on the displaceably guided transport element. Drive means or the transport element is arranged directly on the output member of a linear servomotor. In addition to the simple change of the control profile, the separate drive offers new possibilities in the handling of faults in the book cover machine. For example. can a faultily fitted book cover from the transport element in an easily accessible Entnahmestelle be held while the impact station and / or the Anrolleinrichtung are controlled in a different phase position for the elimination of their disturbance.

Fig. 1

einen Ausschnitt einer Buchdeckenmaschine in schematischer Seitenansicht;

Fig. 2a

die Überführung einer kleinformatigen Buchdecke in schematischer Darstellung;

Fig. 2b

die Überführung einer großformatigen Buchdecke;

Fig. 3a

ein für die Überführung einer kleinformatigen Buchdecke ausgelegtes Bewegungsdiagramm der Überführungseinrichtung;

Fig. 3b

ein für die Überführung einer großformatigen Buchdecke ausgelegtes Bewegungsdiagramm.

The features of the present invention will be explained in the following description of a preferred embodiment with reference to the accompanying drawings listed below. Show it

Fig. 1

a section of a book cover machine in a schematic side view;

Fig. 2a

the transfer of a small-format book cover in a schematic representation;

Fig. 2b

the transfer of a large-format book cover;

Fig. 3a

a movement diagram of the transfer device designed for the transfer of a small-format book cover;

Fig. 3b

a movement diagram designed for the transfer of a large-format book cover.

Fig. 1 shows a section of a book cover machine, in which in continuous promotion blanks of cover boards and a back insert (hereinafter referred to as cardboard 3) are matched with the matching adhesive provided Bezugsnutzen 2 in a Anrollinrichtung 16 to a book cover 1. The protruding edges of the book cover 1 are hammered in subsequent intermittent promotion in successive workstations 33, 36 of a wrapping and pressing device 30 and pressed.

The reference benefit 2 is transferred with a Nutzenzuführung 10 to a continuously rotating Nutzenzylinder 11, which takes over the reference use 2 with grippers 11 a, past a glue applicator roll 13 of a gluing unit 14 and the start point 16 a of the Anrolleinrichtung 16 again. Synchronous to the reference 2, the boards 3 are moved back and forth cardboard shuttles 17 a a paperboard feed 17 to the contact point 16 a. In the contact point 16 a on the cardboard 3 acting pressure rollers 15 ensure that the reference benefits 2 bubble-free is rolled onto the cardboard 3.

The leaking from the Anrolleinrichtung 16 book cover 1 is transferred from the transfer device 19 according to the invention in a Einschlagstationen 33, 36 upstream transfer point 31, wherein the book cover 1 with respect to its leading edge to a formatfesten, ie the same reference edge 33 a is promoted. The transfer device 19 has a suction bar 20 as a transport element, which is equipped with a plurality of juxtaposed suckers 21 and by means of a toothed belt 22 between the Anrollinrichtung 16 and the transfer point 31 before and is movable back. The suction bar 20 still grips the book cover 1 during its continuous advancement through the utility cylinder 11 and the pressure rollers 15.

The back and forth stroke 24 of the suction bar 20 and its suction 21 is in Fig. 1 shown with a conveying stroke reproducing the movement arrow 24. The dashed suction shown 21 a and 21 b show the front Saugerendstellung 21 a and the rear Saugerendstellung 21 b. Due to the format solid reference edge 33 a, to which each book cover 1 is conveyed with its front edge, there is a defined front Saugerendstellung 21 a.

From the transfer point 31, the book cover 1 is transferred from a Saugpressstempel 32 in the lower lying head / foot impact station 33, from which the book cover 1 after folding and pressing the projecting at the head and foot edges by means of a Klemmhubelements 34 can be stored on a conveyor belt 35 is, for transfer to the side impact station 36 for driving and pressing the laterally projecting edges. Finally, the book cover 1 is continuously conveyed to a pressure roller 37 a pressing station 37, for full-surface pressing of the reference use 2 with the cardboard. 3

According to the invention, the transfer device 19 comprises a drive unit (22, 23, 23 a), which can be acted upon by a control profile which can be varied as a function of the format height oriented in the conveying direction. This advantageously takes place with a drive (23) which is separate from the drive (12) of the roll-on device 16 and the drive (38) of the wrapping and pressing device (30). Nevertheless, the invention could also be carried out with a mechanical drive coupling to one of the aforementioned functional units. Different control profiles could be provided by the use of different cams of a corresponding non-uniformly translating intermediate gear, with a corresponding mechanical switching is required.

However, the present embodiment has a servomotor 23 for the transfer device 19, as this offers in addition to the very simple change of the control profile even more advantages that can be used eg for a user-friendly handling of disturbances in the book cover machine. Thus, an incorrectly fitted book cover 1 can be held by the suction bar 20 in an easily accessible removal point, while the head / foot impact station 33 and / or the Anrollinrichtung 16 are controlled in a different phase position to remedy their disorder. In addition, let solve the other specified in the dependent claims characteristics with the servo technology most comfortable.

In the present book cover machine so at least a servo motor 12 for the Nutzenzylinder, a servomotor 38 for the impact and Andrückvorrichtung 30 and the said servomotor 23 for the transfer device 19 are provided. The respective associated controller 12 a, 38 a and 23 a are connected to a higher-level control unit 39, in which a virtual master is formed, followed by the respective drives 12, 38 and 23. In this control unit 39 as well as the respective control profile is automatically determined according to the respective format height to be processed the book cover 1 and the servo drive (servo motor 23 with controller 23 a) specified.

In the Figures 2 a and 2 b, the lifting movements 24.1 and 24.2 of the suction bar 20 are shown, which come for a transfer of a smallest format book cover 1.1 and a largest book cover 1.2 used. It can be seen that the front Saugerendstellung 21 a is identical to that of Fig. 1 where the lifting motion 24 is shown for an intermediate format. However, different are the rear Saugerendstellungen 21 b.1, 21 b.2 and 21 b. The rear Saugerendstellung 21 b.1 is at the smallest bookcase 1.1 near the exit area of the Anrolleinrichtung 16, while the rear Saugerendstellung 21 b.2 in the largest book cover 1.2 farther away. The delivery stroke thus decreases with increasing format height.

In the motion charts the Figures 3 a and 3 b are each the movement curves 50.1, 50.2 shown as a control profile for the smallest or the largest format. On the abscissa axis, the time t is plotted on the ordinate axis of the stroke H. Both movement curves have the same first and same second movement sections 51.I and 51.II respectively. In the first movement section 51.I the suction bar 20 accelerates from a detent 51.VI or a reversal movement to the exit speed of the book cover 1 from the Anrolleinrichtung 16. After this synchronization follows the second movement section 51.II, in which the suction bar 20 synchronously leaking book cover 1 moves and thereby enables safe and accurate positioning gripping by the pneumatically controlled suction 21.

This is followed by a respective third movement section 51.III.1 or 51.III.2, which clearly differs for the smallest or largest format of the book cover 1.1 or 1.2 in stroke and time. In the largest format 1.2, the synchronous movement of the suction bar 20 is first retained over a certain distance (since a rear part of the book cover 1.2 may still be in the Anrolleinrichtung 16), to then be slowed down in the transition to the detent 51.IV in which the book cover 1.2 is taken over by the Saugpressstempel 32.

In the smallest format 1.1, after the complete emergence of the book cover 1.1, the suction bar is first accelerated beyond the synchronizing speed and then likewise decelerated in the transition to the catch 51.V. After the transfer of the book cover 1, 1.1, 1.2 to the Saugpressstempel 32 and the end of the latch 51.IV of the suction bar 20 returns in a return movement 51.V.1 or 51.V.II in its initial position described above.

In Fig. 3 a is still the movement curve 52 shown in the prior art, with both the smallest format 1.1 and the largest format 1.2 has been transferred from the Anrollinrichtung 16 to the transfer point 31. By applying the transfer device 19 according to the invention with control profiles or movement curves 50.1, 50.2 that are different depending on the format height, the cycle time T could be shortened by the difference time T-, whereby a clear increase in output of more than 20% becomes possible.

In the control 39, the respectively applicable control profiles or movement curves can be calculated according to a stored formula from the format height. Alternatively, the various control profiles or movement curves can be stored in the controller as data records assigned to the respective format heights. It has been shown that even the provision of only two different control profiles or movement curves, for example the two movement curves 50.1 and 50.2, brings about a significant shortening of the cycle time T. In this case, the two movement curves 50.1, 50.2 are valid for one, possibly with the other overlapping format height range. Only when the range limits are exceeded, the respective other movement curve is selected and the servo drive (23, 23 a) acted upon.

LIST OF REFERENCE NUMBERS

1

book cover

1.1

Small format book cover

1.2

Largest sized book cover

2

covering material

3

stick

10

use feed

11

use cylinder

11 a

grab

12

servomotor

12 a

regulator

13

glue spreader

14

gluing unit

15

pressure rollers

16

roll-down apparatus

16 a

roll-down

17

board feed

17 a

board pusher

19

Transfer device

20

squeegees

21

sucker

21 a

Front sucker end position

21 b

Rear sucker end position

21 b.1

Rear Saugerendstellg. Kleinstformat

21 b.2

Rear Saugerendstellg. Maximum format

22

toothed belt

23

servomotor

23 a

regulator

24

stroke movement

24.1

Lifting movement miniature format

24.2

Lifting motion largest format

30

Impact and pressing device

31

Transfer point

32

suction-

33

Head / foot turn-in station

33 a

Format-proof reference edge

34

Klemmhubelement

35

conveyor belt

36

Side wrapping station

37

pressing station

37 a

pressure rollers

38

servomotor

38 a

regulator

39

control unit

50.1

Movement curve small format

50.2

Movement curve largest format

51.I

First movement section

51.II

Second movement section

51.III.1

Third movement

51.III.2

Third movement size

51.IV

rest

51.V.1

Return movement of the smallest format

51.V.2

Return movement largest format

51.VI

rest

52

Movement curve SdT

T

cycle time

T-

time difference

t

Time

H

stroke

Claims (9)

Device (19) for transferring a book cover (1, 1.1, 1.2) assembled from cardboard and / or cardboard blank (3) and a cover (2) from one of a utility cylinder (11) and at least one pressure roller (15) glued reference benefit (2) and the blanks (3) interconnecting Anrolleinrichtung (16) to a transfer point (31), from which the book cover (2) of a wrapping and pressing device (30) for driving over protruding reference benefit edges can be fed clockwise, with a before and movable back, the book cover (1, 1.1, 1.2) emerging from the Anrolleinrichtung (16) in a substantially synchronous motion frictionally engaging transport element (20), characterized in that the device (19) has a drive unit (22, 23, 23 a ), which can be acted upon by a control profile (50.1, 50.2) which can be varied as a function of the format height oriented in the conveying direction, with a defined end position (21 a) of the transport element (20) in the transfer point (31) and a changing delivery stroke. Apparatus according to claim 1, characterized in that the delivery stroke decreases correspondingly with increasing format height. Apparatus according to claim 1 or 2, characterized in that the respective control profiles (50.1, 50.2) substantially same first and same second movement sections (51.I or 51.II) for synchronization or for synchronous movement of the transport element (20) the book cover (1, 1.1, 1.2) emerging from the roll-on device (16). Apparatus according to claim 3, characterized by a third, variable-displacement movement section (51.III.1, 51.III.2), which is designed in compliance with predefinable, positive and negative maximum accelerations to the effect that the shortest possible transport time results. Device according to one of claims 1 to 4, characterized in that after the complete emergence of the respective book cover (1, 1.1, 1.2) from the Anrollinrichtung (16) the transport element (20) beyond the by the Anrolleinrichtung (16) defined synchronizing speed accelerated out is. Device according to one of claims 1 to 5, characterized by at least two different control profiles (50.1, 50.2), which are each assigned to a specific range formate height. Device according to one of claims 1 to 6, characterized in that the respective control profile (50.1, 50.2) via a connection of the drive unit (22, 23, 23 a) to a control unit (39) is fixed. Device according to one of claims 1 to 7, characterized in that the drive unit has a separate from the Anrollinrichtung (16) and the first following impact station (33) drive (23, 23 a). Device according to claim 8, characterized in that the drive unit (22, 23, 23 a) comprises a servomotor (23) and at least one spindle, toothed belt (22), chain or the like acting on the displaceably guided transport element (20) or the transport element (20) is arranged on the output member of a linear servomotor.

Images