EP0893381B1 - Method of and device for handling webs having adhesive - Google Patents

Description

The invention relates to a method for handling material webs on one side applied coating of an active adhesive, the material web of a pulled off the first bobbin and after using it a new material web Replacement bobbin connected to the running material web and an initial section the new material web is kept ready by a transmission organ and the Initial section of the new material web with the adhesive side on the Transmission element is present, and being used to connect the initial section of the new Material web with the running material web the beginning section with its Adhesive-free side on the facing, adhesive side of the material web is pressed in such a way that the running material web the beginning section of dissolves and carries the organ of transmission. In particular, the process in Connection with the application of adhesive strips to folding boxes or the like apply.

The invention also relates to a device according to Preamble of claim 3.

Material sheets or adhesive strips coated on one side with active adhesive used, for example, to close folding boxes. A so-called tape aggregate carries the adhesive strip on the top and bottom, for example on the folding carton in the area of adjoining closing flaps. The Adhesive tape consists of a plastic sheet with active one-sided application Adhesive.

The material web or the adhesive strip is available as a (wound) bobbin posed. After the same has been used, a new material web or a new one should be used Adhesive strips on the running material web with as little effort as possible be connected.

DE 1 057 912 B, which corresponds to the preamble of claims 1 and 3, describes a device for gluing a new adhesive strip known to a running adhesive tape. The running adhesive tape is in front of the Connect with the new adhesive strip from a remaining piece cut off. An initial section of the new adhesive tape is in one Embodiment at tangential points of three successive roles and at a holding finger arranged at a distance from it.

From US 5,190,612 A is a device for applying self-adhesive Known labels on bottles. An order body is with a small pyramid provided surface. The stickers are made using the segments Stack removed and handed over to gripper.

FR 2 117 528 A deals with the automatic connection of adhesive strips. The sticky side of a running strip becomes the non-sticky side of one new strip connected. A remainder of the running web is cut off. The new web is on a roll before being connected to the running web glued.

Finally, WO 9427869 A shows a device for connecting adhesive strips which is also the remaining section of a running web when connecting the two Webs is cut off.

The invention has for its object a method and a device propose that are suitable for a simple, reliable handling of Adhesive tape, especially when connecting a new adhesive tape to one to ensure running adhesive strips.

This task is accomplished by a method according to Claim 1 and an apparatus according to claim 3 solved.

Further special embodiments of the invention are defined in dependent claims 2 and 4 to 9.

The beginning section of the new track is by - machine or manually - operable holder on which the Start section of the adhesive-containing side. The Contact area of the holder is designed so that the holding force sufficient for the initial section to complete this up to the plant to fix on the runway. By contacting the adhesive Side of the runway will have a greater holding force generated which resulted in the beginning section on the runway Adhesive fixed so that the holder from the initial section the new course can be solved.

The holder for the initial section of the new track is a movable, in particular pivoting arm, which is the beginning section by transverse movement to the runway in the area of a deflection the same, especially in the region of a deflecting roller, presses.

Another special feature of the invention is that the active bobbin, from which the material web is pulled, up to full consumption is driven empty. So there is none Remaining section of the material web on the bobbin or on a Reel core. In the invention, special measures are provided that even after pulling off the end portion of the web a certain tension from the bobbin or the bobbin core remains in the material web, so that this without Warping, wrinkling or the like until connection the new material web can be transported. To this The purpose of the invention is a cross-sectional deformation of the running Material web provided.

In the area of a splice station, a common, pivotable carrier, in particular on a support plate, two Arranged bobbins of the adhesive strip, namely a drain bobbin and a replacement bobbin from which the new track is pulled. The drain bobbin is turned in by turning the support disc a predetermined drain position and the replacement bobbin in one Waiting position moved. The initial section of the new railway will be preferably manually removed from the replacement bobbin and to the Holder created.

Further details of the invention relate to the configuration the splice station and organs for transferring adhesive strips on objects.

Fig. 1

eine Vorrichtung zum Aufbringen von Klebestreifen auf Faltkartons in vereinfachter Seitenansicht,

Fig. 2

eine Splicestation als Einzelheit der Vorrichtung gemäß Fig. 1, in vergrößertem Maßstab,

Fig. 3

die Splicestation gemäß Fig. 2 in Queransicht,

Fig. 4

ein Detail der Splicestation in vergrößertem Maßstab,

Fig. 5

eine Queransicht der Splicestation in einer zu Fig. 3 versetzten Ebene,

Fig. 6

einen Halteschuh der Splicestation in einem vergrößerten Querschnitt in der Schnittebene VI-VI der Fig. 5.

An embodiment of the device according to the invention is explained in more detail below with reference to the drawings and the process flow. It shows:

Fig. 1

a device for applying adhesive strips to folding cartons in a simplified side view,

Fig. 2

2 shows a splice station as a detail of the device according to FIG. 1, on an enlarged scale,

Fig. 3

2 in lateral view,

Fig. 4

a detail of the splice station on an enlarged scale,

Fig. 5

3 shows a transverse view of the splice station in a plane offset from FIG. 3,

Fig. 6

a holding shoe of the splice station in an enlarged cross section in the section plane VI-VI of FIG. 5th

The device shown in Fig. 1 is concerned with the attachment an adhesive tape 10 on a folding box 11. On one The top and bottom of the folding box 11 each an adhesive tape running in the longitudinal direction thereof 10 attached to connect folding tabs together.

An upper one is used to apply the adhesive strips 10 and lower tape unit 12, 13, which automatically has an adhesive strip 10 attaches to the folding box 11.

The adhesive strip 10 is a continuous strip or a continuous web of material 14 separated. This exists preferably made of plastic and is one-sided with an active Adhesive 15 coated. The material web 14 is a bobbin 16 removed and fed to the tape unit 12, 13. The Bobine 16 is located in a splice station 17 together with a replacement bobbin 18. In the present embodiment is the device with two matching splice stations 17 equipped to independently each tape unit 12, 13 with Supply material.

When the active bobbin 16 has been used up, it takes place in the area Splicestation 17 a largely automatic connection of the replacement bobbin 18 instead of the running material web 14. In which However, the present example is a certain manual one Use for changing the bobbin.

The replacement bobbin 18 becomes during the pulling off of the material web 14 prepared by the (active) bobbin 16 for a change. For this purpose, an initial section 19 is (manually) from the Replacement bobbin 18 removed and adjacent to the material web 14 kept ready. After partial or complete deduction of the Material web 14 from the bobbin 16 becomes the initial section 19 the replacement bobbin 18 to an end portion 20 of the expiring Material web 14 pressed and so the connection of the material web 14 made with the replacement bobbin 18.

The splice station 17 is used to carry out the lane change provided automatically working organs. The (ongoing) Material web 14 is at the exit of the splicing station 17 via Guide element guided, namely via a guide roller 21. The material web 14 is wound on the bobbin 16 so that the one-sided attached to the web of adhesive 15 in the area of Deflection roller 21 faces outwards.

The deflection roller 21 is mounted at a distance from the bobbin 16, namely on a (upright) support wall 22. The from the bobbin 16 removed material web 14 is via a guide the deflection roller 21, namely via a Shoe 23. This is designed as an elongated, one-armed lever with a (lower) pivot bearing 24 adjacent to the deflection roller 21, above it.

The shoe 23 has a guide surface 25 for the material web 14 provided. The shoe 23 is - seen in cross section - formed as an elongated hollow body with a corresponding Cross-sectional contour of the guide surface 25. As in particular 6 shows the shoe 23 in cross section approximately C-shaped, that is, open on one side Profile. The guide surface 25 forms obliquely at the edges Side strips 26, 27. These go to the free Outer edges over in again angled guide leg 28, 29th

The material web 14 runs continuously on that described in the Way contoured guide surface 25 along and thereby receives a corresponding, shaped cross-sectional shape. hereby is prevented that the material web 14 in its longitudinal direction is deformed, in particular wrinkles. Furthermore causes the shoe 23 due to the design of the guide surface 25 a holding force on the transported material web 14 it is possible with this device, the respective bobbin 16 to run completely empty, i.e. without disconnecting one Remaining part of the material web 14, which remains on the bobbin 16. A special feature lies in this and in the design of the shoe 23 the device.

For changing the bobbin, the shoe 23 is swiveled out the plane of movement of the material web 14 moved out into a Position shown in phantom in Fig. 2. After this Changing the bobbin, the shoe 23 is brought back into position, in which the material web 14 rests on the guide surface 25.

The replacement bobbin 18 or its initial section 19 is adjacent to the deflection roller 21 for connection to the material web 14 kept ready. The initial section 19 lies on a transmission element on, namely on a transfer roller 30, which in turn at the lower or free end of a one-armed transmission lever 31 is stored. The latter is adjacent to one another pivot bearing 32 arranged for replacement bobbin 18 pivotable. This is also arranged on the common support wall 22. The relative position is chosen so that at a Pivoting movement according to arrow 33, the transfer roller 30 from the Starting position according to FIG. 2 in the transfer position Fig. 4 is pivoted. In this, the transfer roller 30 is immediate adjacent to the circumference of the deflection roller 21, namely such that a free end of the start section 19 to the material web 14 is pressed in the region of the deflecting roller 21.

The replacement bobbin 18 is positioned so that the initial section 19 with the adhesive 15 of the transfer roller 30 or Transmission lever 31 is turned. The initial section 19 is therefore with an adhesive surface on the circumference of the transfer roller 30 and - in the present embodiment - on Transmission lever 31 on.

Transfer roller 30 and / or transfer lever 31 are designed that on the one hand the one with the adhesive side Material web is kept sufficient, but on the other hand Press on a side of the material web provided with adhesive 15 14 this detects the end of the beginning section 19 and of the transfer roller 30 or the transmission lever 31 deducts. To for this purpose, the transfer roller 30 along the circumference Provide projections or increases. It is in the present case around protruding tips 34, which here by pyramid-shaped ridges 35 are formed. The increases 35 and thus their tips 34 are in the present case in longitudinal and transverse rows in regular distribution along the The circumference of the transfer roller 30 is arranged.

In the area of the transmission lever 31 is adjacent to the transfer roller 30 a holding piece 36 for the material web 14 or the Initial section 19 formed. This is the beginning of the section 19 also on. The holding piece 36 is the same here Way as the transfer roller 30 with ridges 35 and 34 tips Mistake.

When handing over the new material web or the initial section 19 to the running material web 14 becomes an end region of the beginning section 19 with the glue-free side the adhesive side 15 of the material web 14 pressed and thereby created a sufficiently durable connection. The material web 14 is then pulled off the replacement bobbin 18, which takes over the function of the active bobbin 16.

The connection of the start section 19 of the new material web the running material web 14 is carried out automatically. The running bobbin 16 is driven completely empty. The end of the web of material 14 is scanned. In the present Embodiment (Fig. 2) is an expiring Lane 14 observing photocell 37 is provided. Instead, can in the area of a rotating bearing of the bobbin 16 with a rotating one non-contact button, for example an initiator, be formed, the standstill after the end of the material web 14 the bobbin holder or the reduced rotation speed as a signal for the complete removal of the material web 14 recognizes.

When the complete run of the material web 14 is determined the transfer process is initiated immediately. For this purpose, the transmission lever 31 is described in the Senses pivoted up to the end of the circumference of the deflection roller 21. The pivoting movement of the transmission lever 31 is caused by an actuator actuated by the photocell 37, namely by an (electric) cylinder 38, the piston rod 39 on a transverse arm 40 of the transmission lever 31 connected.

The replacement bobbin 18 is in the present embodiment manually prepared for connection. The beginning section 19 is removed by hand from the replacement bobbin 18 and in the position described, bearing on transfer roller 30 and transmission lever 31 brought. Below the transfer roller 30 there is a stationary knife 41 End of the initial section 19 separated, so that the initial section 19 always in an exact relative position Transfer roller 30 receives. It also has an exact end edge created by the knife 41. The knife 41 is also on the support wall 22 attached.

The device or the splice station 17 is equipped with monitoring devices provided that the presence of material, namely the material web 14 monitored at the important areas. The realized idea is that the rotational movement of the Deflection roller 21, on the one hand, the presence of the material web 14 presupposes. On the other hand, this can also be the correct one Deduction of the adhesive strips 10 are monitored, namely in terms of length. For this purpose, the rotary motion the deflection roller 21 by a non-contact button monitored, namely by a so-called initiator 64. This acts without contact with a rotating with the deflection roller 21 Control body together. In the present case there is a control disc 65 with (three) at equal circumferential distances from each other arranged radial projections 66 provided and on a shaft for the deflection roller 21 arranged, that is, with this rotation. The initiator 64 is rotated by the protrusions 66 Control disc 65 applied. This will become basically recognizes the rotational movement of the deflection roller 21, on the other hand also the length of the removed section the material web 14.

Active Bobine 16 and Replacement Bobine 18 have due to the way they work the splicing station 17 a predetermined relative position. For this purpose, the bobbins 16, 18 are adjustable, namely on a pivotable or rotatable member. It in the present case, this is an (upright) Support disc 42. This is rotatably supported by a central bearing 43, namely on the support wall 22. The support disc 42 is after each bobbin change rotated so that the replacement bobbin 18 reaches the position of the active bobbin 16. The support disk 42 is rotated clockwise according to arrow 44. The material web 14 comes from the area of the replacement bobbin 18 to rest on the shoe 23, the material web 14 with cross-sectional deformation in the cavity of the shoe 23 entry. In the present embodiment, the Shoe 23 pivotable about the (lower) pivot bearing 24 in the dash-dotted line position shown in FIG. 2. In this position the rotation of the support disk 42 is carried out. The Shoe 23 is then pivoted back into the working position and takes up the material web 14.

The support disk 42 is manual in this embodiment rotatable. Handles are provided for this purpose one handle 45, 46 each in the area of a reel bearing 47, 48. The transversely projecting handles 45, 46 can be grasped and so the Carrier disc 42 are rotated.

The working position of the support disk 42 is fixed, namely by a locking pin, which can also be operated with handle 49 enters a locking hole 50 of the support plate 42 for fixation the same on a holder, namely on the support wall 22nd

The handles 45, 46 in the area of the reel bearings 47, 48 have a double function. The handles practice one by means of springs 51 axially directed pressure on the reels 16, 18 or on a Bobbin core 52 out. This creates a braking effect due to friction generated in the area of the reels 16, 18. The braking effect is adjustable with the help of knurled wheels 53, which are used for change the tension of the springs 51 can be adjusted.

Another specialty concerns the arrangement of the tape units 12, 13. The device is overall on a portal-like Support frame 54 attached. The two on top of each other arranged splice stations 17 or their support wall 22 is on an upright support 55 of the support frame 54 is attached. On an opposite support 56 are the two tape units 12, 13 mounted on a bracket 57. This has one upper and lower transversely projecting support arm 58, 59. At the end a tape unit 12, 13 is mounted on each support arm. each Tape aggregate 12, 13 is with a guide 60, 61 on the Support arm 58, 59 slidable, so that an exact position each Tape aggregates 12, 13 can be done in the horizontal direction.

In addition, one of the tape aggregates 12, 13 is in the present Fall the top tape aggregate 12 in the vertical direction adjustable to adapt to different formats of the folding boxes 11. The support arm 58 is with a vertical guide 62nd connected. This is on an upright in the vertical direction Support rod 63 slidable. This is part of the bracket 57.

LIST OF REFERENCE NUMBERS

10

tape

11

folding

12

Tape subassembly

13

Tape subassembly

14

web

15

Glue

16

reel

17

splicing station

18

replacement reel

19

initial section

20

end

21

deflecting

22

supporting wall

23

shoe

24

pivot bearing

25

guide surface

26

shoulder

27

shoulder

28

guide leg

29

guide leg

30

Transfer roll

31

transmission lever

32

pivot bearing

33

arrow

34

top

35

increase

36

holding piece

37

photocell

38

cylinder

39

piston rod

40

poor

41

knife

42

carrying disc

43

central warehouse

44

arrow

45

handle

46

handle

47

Bobinenlager

48

Bobinenlager

49

Handle

50

locking bore

51

feather

52

reel core

53

knurl

54

supporting frame

55

support

56

support

57

bracket

58

Beam

59

Beam

60

guide

61

guide

62

vertical guide

63

supporting rod

64

initiator

65

control disk

66

head Start

Claims (9)

1. Method of handling material webs (14) coated with an active adhesive on one side, it being the case that the material web (14) is drawn off from a first reel (16) and, once the latter has been used up, a new material web of a replacement reel (18) is attached to the outgoing material web (14) and an initial section (19) of the new material web is held ready by a transfer element and the initial section (19) of the new material web butts against the transfer element by way of the side which contains adhesive (15), and that, in order to connect the initial section (19) of the new material web to the outgoing material web (14), the initial section (19) has its adhesive-free side pressed onto the facing, adhesive-containing side of the outgoing material web (14), such that the outgoing material web (14) releases the initial section (19) from the transfer element and carries it along, characterized by the following features:

   a) the initial section (19) butts with reduced retaining force against the transfer element,

   b) the outgoing material web (14) is subjected to a retaining force in order for the material web (14) to butt against a guide surface (25),

   c) the outgoing material web (14) is drawn off from the first reel (16) until it has been completely used up, with the result that the initial section (19) of the new material web is pressed onto an end section (20) of the outgoing material web (14), and the end section (20) releases the initial section (19) from the transfer element, on account of the reduced retaining force, and carries it along.
2. Method according to Claim 1, characterized in that the outgoing material web (14) or at least the end section (20) is deformed in cross section during transportation to form an open hollow profile, in particular with trough-like transverse deformation, this producing the retaining force in order for the material web (14) to butt against the guide surface (25), and is then connected to the initial section (19).
3. Apparatus for handling material webs (14) with active adhesive (15) applied to one side, having at least one splicing station (17), in which the material web (14) can be drawn off from a reel (16) and in which is held ready a replacement reel (18) for attaching an initial section (19) of a new material web to the outgoing material web (14), the outgoing material web (14) running along a guiding and/or carrying element such that the adhesive (15) is located on the free, outer side, and the initial section (19) of the new material web butting against a transfer element by way of the adhesive-containing side, characterized by the following features:

   a) the transfer element is provided with protrusions, elevations or the like such that the initial section (19) butts with reduced retaining force against the transfer element,

   b) arranged upstream of the guiding and/or carrying element for the outgoing material web (14), as seen in the conveying direction, is a guiding element, in particular an elongate rectilinear shoe (23), with a profiled guiding surface (25) for the material web (14), such that the material web (14) has a curved cross-sectional shape in the region of the guiding element.
4. Apparatus according to Claim 3, characterized in that the transfer element, in particular the circumference of a transfer roller (30), is designed with points (34) which are arranged along the circumference and are intended for the abutment of the adhesive-containing side of the initial section (19), the points (34) preferably being formed by pyramid-like elevations (35) oriented in longitudinal and transverse rows.
5. Apparatus according to Claim 3 or 4, characterized in that, in order to transfer the initial section (19), the transfer element or the transfer roller (30) can be pressed against the outgoing material web (14), in particular in the region of a deflecting roller (21) as guiding and carrying element for the material web (14).
6. Apparatus according to Claim 3 or one of the further claims, characterized in that the transfer element for the initial section (19) has a pivotable lever, namely a transfer lever (31), at the bottom, free end of which the transfer roller (30) is arranged, and in that the transfer lever (31) can be pivoted by an actuating element, preferably by a cylinder (38).
7. Apparatus according to Claim 3 or one of the further claims, characterized in that the reel (16) and the replacement reel (18) are arranged on a common, movable carrier, in particular on a rotatable carrying disc (42), it being possible, once the initial section (19) or a new material web has been attached to the outgoing material web (14), for the carrying disc (42) to be rotated such that the former replacement reel (18) passes into the position of the active reel (16)
8. Apparatus according to Claim 3 or one of the further claims, characterized in that two independent, corresponding splicing stations (17), which are preferably arranged in a mirror-inverted manner in relation to a horizontal plane, are provided in order to supply two tape subassemblies (12, 13).
9. Apparatus according to Claim 3 or one of the further claims, characterized in that the tape subassembly (12, 13) or the tape subassemblies (12, 13) is/are arranged on a holder (57) such that each tape subassembly (12, 13) can be adjusted in the horizontal direction and at least one tape subassembly (12) can be adjusted in the vertical direction.

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