DE10058437A1 - Mechanism for connecting ends of paper wound on rolls which feed printing machine comprises cutter which cuts paper as it passes between axes of rolls and glues it to new roll, rolls being mounted on arms which swivel about common pivot - Google Patents

Abstract

The mechanism for connecting the ends of paper wound on rolls (6, 7) which feed a printing machine, to change rolls without stopping the machine, comprises a cutter and connector (15) which cuts the paper (11) as it passes between the axes of the rolls and glues it to the end of a new roll (7). Each of the rolls is mounted on an arm (3, 4) which swivels about a common pivot from a position where they are close together to one where they are separated.

Description

The invention relates to devices for connecting two webs according to the The preamble of claims 1 or 4.

From DE 42 18 825 A1 a device for flying roll change is known, at the one with a new paper web on the running paper web Production speed running printing machine can be glued. After this The running paper web is glued on using a Cutting device cut to form two web ends, one End of the web is conveyed together with the new paper web by the printing press and the second web end together with the used paper roll from the Roll changer is removed. When changing the roll, both paper rolls also turn same direction of rotation, the running paper web in this way on the new paper roll is passed so that the beginning of the new paper web when glued to the running paper web as tangentially as possible on the running paper web to the system comes.

From US 49 36 942 A a device for flying roll change is known in a cutter and an adhesive roller are provided in a frame. When changing rolls, the frame can be attached to the running paper web from one side be approximated so that when the connection device is triggered, an adhesive roller together with the running paper web against the glue point of the new paper web is pressed. The running paper web is then cut through the cutting knife severed.

From EP 07 20 581 B1 a device for flying roll change is known from  which the tension of the paper web through a suitable movement kinematics during of the gluing or cutting process can be kept substantially constant.

The invention has for its object devices for connecting two webs to accomplish.

The object is achieved by the features of claims 1 or 4.

An advantage that can be achieved with the invention is in particular that a simplified design of the roll changing devices is made possible. By the opposite direction of rotation it becomes possible to tangent the running path to the new one To approach the reel without the running web passing the new reel must become. In the known devices for flying roll change had to the role running in the direction of conveyance of the web is seen behind the new one Reel should be arranged, because only then the running web sufficiently close to the new one Role could be passed. From this it followed, however, that the new train after one Role changes must be moved to a position in which they in turn next role change can be guided past the next role can. Two-arm or multi-arm swivel frames are used for this Swivel arms each carry a role and around a swivel axis in one Direction of rotation can be driven rotating.

Another advantage of the device according to the invention is in particular that the Cutting device optionally from different sides with the running Material web can be brought into engagement. This is particularly advantageous if the Rolls between the roll changes are not moved, but fixed rotate arranged axes of rotation. Because depending on which side the Material roll is arranged, from which the currently running material web is unwound, can then either from one side or from the other side  Gluing device or the cutting device with the running web in engagement to be brought.

Another advantage of the invention is that the role changer, at least two material rolls can be clamped, not as in the known roll changers in is driven in a rotating direction, but alternating between at least two functional positions is adjustable. It can thereby be achieved that the required space for installing the reel changer can be significantly reduced can. In particular, the swivel arms of the reel changer no longer have to be under the Swivel axis of the reel changer can be carried out so that the overall height is considerable can be reduced and the pit for swiveling the material web is eliminated.

Embodiments of the invention are shown in the drawings and are in following described in more detail.

Show it:

Figure 1 shows a first embodiment of a device when rolling a web of material in a schematically illustrated cross section.

FIG. 2 shows the device according to FIG. 1 when a running material web is connected to a new material web;

3 shows a second embodiment of a device during unrolling a web of material in a schematically illustrated cross-section.

FIG. 4 shows the device according to FIG. 3 when connecting a running material web with a new material web;

FIG. 5 shows a third embodiment of a device when rolling off a material web in a schematically illustrated cross section; FIG.

Fig. 6 shows the device of FIG. 5 in connecting a web of material running with a new web of material.

Figs. 1 to 6 illustrate schematically three embodiments of a device for flying reel change, in which components are identified with the same function on the same reference characters.

The device 01 shown in FIG. 1 has a reel changer 02 with two swivel arms 03 ; 04 on. At the end of the swivel arms 03 ; 04 a roll of material 06 or 07 can be clamped, the rolls of material 06 ; 07 by means of drive means (not shown), for example motor-driven mandrels, about the axis of rotation 08 ; 09 can be driven in rotation. In the illustrated Fig. 1 process phase no material roll 07 is mounted on the swing arm 03 and the outgoing material web 11, for example a paper web 11 which is conveyed in a web-fed rotary printing machine, is unwound from the material web 06 in accordance with the processing speed of the downstream equipment.

In the process phase shown in FIG. 2, the material roll 06 is emptied to such an extent that a roll change to a new roll, namely the material roll 07 now clamped on the swivel arm 03 , must take place. In order to be able to carry out the roll change by gluing the beginning of the material web 07 to one side of the running material web 11 without the material rolls 06 ; 07 to bring the material roll 06 to a standstill until it is detected by a light barrier 29 . The material roll 06 has then reached the adhesive position. Then the material roll 07 is first accelerated until the peripheral speed essentially corresponds to the conveying speed of the running material web 11 . The material web 07 is arranged for changing the rolls so that the running material web 11, starting from the material roll 06, between the axes of rotation 08 ; 09 of the material rolls 06 ; 07 is passed through. So that the beginning of the new material web (not shown) wound on the material roll 07 can come to rest as tangentially as possible and with the correct direction of rotation on the running material web 11 , the material webs 06 ; 07 with the opposite direction of rotation, as indicated by the movement arrows 12 ; 13 indicated driven.

In order to be able to connect the respectively new material web to the previously running material web 11 when the reel is changed and then to cut the one material web 11 , a combined connecting and cutting device 15 with a frame 14 is provided in the device 01 , which frame has two arms 16 ; 17 and is pivotally mounted about a pivot axis 20 . At the outer ends of the arms 16 ; 17 is arranged in each case 21, 22 a hole formed for example in the manner of a bonding roller 18 and 19, connecting member 18 or 19 and a hole formed for example in the manner of a cutting blade 21 and 22, cutting member. A schematically illustrated guide device 25 is provided in the pivot axis 20 , through which the running material web 11 can be carried out.

The function of the combined connecting and cutting device 15 when changing rolls is particularly clear from FIG. 2. If a change is to be made on the fly from a material roll 06 spanned on the left to a material roll 07 spanned on the right, the frame 14 is initially pivoted counterclockwise until the left connecting element 18 is sufficiently close to the material roll 07 . The adhesive labels or the like attached to the material roll 07 are detected with an adhesive point sensor 23 , for example a photo cell, and the connecting element 18 is then triggered at the appropriate time. After triggering of the connecting member 18, the designed in the manner of an adhesive roller 18, link member 18 pivots about a pivot axis 24 in the direction of the circumference of the roll of material 07 and compressing the outgoing material web 11 o against the attached to the material roll 07 adhesive tape. Ä., So that the new material web is pulled from the material roll 07 through the running material web 11 . Immediately afterwards, the cutting member 21 is triggered in order to thereby separate the material roll 06 from the running material web 11 , which is now unwound from the material roll 07 .

If, after emptying the material roll 07, another, not shown, flying roll change to a new left material roll now attached to the swivel arm 04 is to take place, the frame 14 can be pivoted counterclockwise from the basic position shown in FIG. 1 in accordance with the mode of operation shown in FIG. 2 in this case, the right connecting element 19 or the right cutting element 22 are used to connect the material webs or to separate them. As a result, the combined cutting and connecting device 15 can be brought into engagement with the respectively running material web 11 either from the right or the left. The intervention takes place in each case from the side of the running material web 11 , which faces the axis of rotation 08 or 09 of the material roll 06 or 07 that has been unwound. Therefore, in the example shown in Fig. 2 roll changes the engagement of the combined fastening and cutting means 15 from the left side is carried out, as this side of the web 11 to the rotation axis 08 of the abspulenden before the reel change material roll 06 has.

To adjust the frame 14 , only a two-way drive device, for example a suitably designed pneumatic cylinder, is required in order to bring the frame 14 closer to the running material web 11 either from the right or from the left when the roll is changed.

Of course, it is also conceivable to roll the material rolls 06 ; 07 to be arranged one above the other, in which case the combined connecting and cutting device 15 can be brought into engagement either from below or above on the running material web 11 . An overturned arrangement of device 01 would also be possible. The combined connecting and cutting device 15 is then located below the material rolls 06 ; 07 .

The swivel arms 03 ; 04 can be pivoted about a pivot axis 26 in accordance with the movement arrow 28 in order to corresponding to the setting angle of the pivot arms 03 ; 04 to be able to move to defined functional positions. The swivel arms 03 ; 04 are pivoted when pivoting between the functional positions by an angle of less than 180 °, in particular by an angle of approximately 90 °. The pivoting movement of the pivot arms 03 ; 04 can be done both clockwise and counterclockwise, with the axes of rotation 08 ; 09 the roll of material 06 ; 07 when pivoting the swivel arms 03 ; 04 move on a circular path 27 .

Fig. 3 and Fig. 4 show a second embodiment of a device 31 whose construction substantially corresponds to the device 01. In contrast to the combined connecting and cutting device 15 of the device 01 , the combined connecting and cutting device 15 a has a divided frame 14 a, the arms 16 a; 17 a are not rigidly connected to one another and can be pivoted together about the pivot axis 20 and can be driven independently of one another. The function of the combined connecting and cutting device 15 a when changing the roll is particularly evident from FIG. 4. To change the roll, only one of the two arms 16 a and 17 a is adjusted in order to bring the running material web 11 closer to the new roll, that is to say the material roll 07 in FIG. 4. The function of the connecting members 18 ; 19 or the cutting members 21 ; 22 corresponds to the mode of operation in device 01 . The use of independently adjustable arms 16 a; 17 a is always particularly advantageous when there is only little installation space available and therefore the upward or outward pivoting of the arm 16 ; 17 causes difficulties.

FIG. 5 and FIG. 6 show a third embodiment of a device 32 for connecting material webs when changing rolls on the fly. Again, the material rolls 06 ; 07 driven during the roll change with opposite directions of rotation, in which device 32 the rolls of material 06; 07 on fixed rotation axes 33 ; 34 , for example, mandrels fixed to the frame, are arranged. An adjusting movement of the axes of rotation 33 ; 34 before, during or after the role change is therefore not possible and also not necessary. Rather, the material rolls 06 ; 07 by means of suitable conveying means, not shown, for example the use of swivel arms or lifting tables, in the area of the clamping on the rotation axes 33 ; 34 .

The combined connecting and cutting device 15 b of the device 32 has a rigid frame 14 b with two arms 16 b and 17 b, on which in turn a connecting member 18 or 19 and a cutting member 21 or 22 is provided. To the combined connecting and cutting device 15 b during roll changes on the roll of material 07 is closer, they axially displaceably mounted on a guide 36 and can be moved linearly with the movement arrow 37 accordingly. The guide 36 in turn is mounted so as to be pivotable about a pivot axis 38 . When changing the roll, the combined connecting and cutting device 15 b is initially aligned by pivoting the guide 36 until it points in the direction of the axis of rotation 34 of the new roll of material 07 . Thereafter, the combined connecting and cutting device 15 b is moved linearly downwards on the guide 36 until the connecting member 18 is sufficiently close to the material roll 07 . The connecting member 18 and the cutting member 21 are then activated and triggered by a glue point sensor 23 , so that the new material web is fixed to the running material web 11 and then the material web 11 running from the material roll 06 is cut with the cutting member 21 .

When changing the roll, not shown, from a right-hand material roll 06 to a new left-hand material roll 07 , the combined connecting and cutting device 15 b is used accordingly, the guide 36 being pivoted clockwise from the vertical basic position shown in FIG. 5.

Of course, embodiments are also conceivable here in which the material rolls 06 ; 07 are arranged one above the other, in which case the combined connecting and cutting device 15 b does not have to be pivoted to the side, but rather upwards or downwards. Combined connecting and cutting devices are also possible, which can be adjusted about several pivot axes or along several linear guides, in order thereby to be able to optimally position the connecting members or cutting members.

An overturned arrangement of the device would also be possible. The combined connecting and cutting device 15 b is then located below the material rolls 06 ; 07 .

LIST OF REFERENCE NUMBERS

01

contraption

02

reelstands

03

swivel arm

04

swivel arm

05

-

06

material roll

07

material roll

08

Axis of rotation (

06

)

09

Axis of rotation (

07

)

10

-

11

Material web, paper web, expiring

12

movement arrow

13

movement arrow

14

frame

15

Connection and cutting device, combined

16

poor

17

poor

18

Lanyard, adhesive roller

19

Lanyard, adhesive roller

20

Swivel axis (

15

)

21

Cutting organ, knives

22

Cutting organ, knives

23

Splice sensor

24

Swivel axis (

18

;

19

)

25

guide

26

Swivel axis (

02

)

27

orbit

28

movement arrow

29

Photoelectric barrier

30

-

31

contraption

32

contraption

33

Axis of rotation (

06

)

34

Axis of rotation (

07

)

35

-

36

guide

37

movement arrow

38

Swivel axis (

36

)

14

a frame, divided

15

a connecting and cutting device, combined

16

a arm

17

a arm

14

b frame, rigid

15

b Connection and cutting device, combined

16

b arm

17

b arm

Claims (7)

1. An apparatus (01; 31; 32) for connecting two in each case on a roll of material (06; 07) spooled material webs (11), in particular paper webs (11), during a flying roll change, with a joining and cutting means (15; 15 a; 15 b) for connecting, in particular for gluing, the new material web to the running material web ( 11 ), and with a connecting and cutting device ( 15 ; 15 a; 15 b), by means of which the running material web ( 11 ) forms two web ends can be severed, wherein at least two material rolls ( 06 ; 07 ) are arranged in a roll changer ( 02 ), characterized in that the roll changer ( 02 ) is alternately adjustable between at least two functional positions. 2. Device according to claim 1, characterized in that the roll changer ( 02 ) has at least two swivel arms ( 03 ; 04 ), on each of which a material roll ( 06 ; 07 ) can be clamped, the swivel arms ( 03 ; 04 ) together or separately can oscillate between at least two functional positions about a pivot axis ( 26 ). 3. Device according to claim 2, characterized in that the swivel arms ( 03 ; 04 ) are pivoted when pivoting between the functional positions by an angle smaller than 180 °, in particular by an angle of approximately 90 °. 4. Device ( 01 ; 31 ; 32 ) for connecting two material webs ( 11 ) wound on a material roll ( 06 ; 07 ) with at least one connecting element ( 18 ; 19 ), characterized in that at least two connecting elements ( 18 ; 19 ) are arranged are. 5. The device according to claim 4, characterized in that each connecting member ( 18 ; 19 ) is coupled to a cutting member ( 21 ; 22 ). 6. The device according to claim 5, characterized in that the cutting members ( 21 ; 22 ) and / or connecting members ( 18 ; 19 ) on a frame ( 14 ; 14 a; 14 b) or on arms ( 16 ; 16 a; 16 b; 17 ; 17 a; 17 b) are mounted and by adjusting the frame ( 14 ; 14 a; 14 b) or the arms ( 16 ; 16 a; 16 b; 17 ; 17 a; 17 b) to the end Material web ( 11 ) can be approximated. 7. The device according to claim 6, characterized in that both arms ( 16 , 16 a; 16 b; 17 ; 17 a; 17 b) are rigidly connected to one another.