DE3145276C2 - Device for applying flat material sections to packaging blanks - Google Patents

Abstract

The invention relates to a device for applying flat material sections, for example prefabricated carrying handles to packaging blanks, which are moved continuously in a certain sequence along a transport path. The device should be suitable for high processing speeds and adaptable to packaging blanks of different lengths. This device has two drive disks (12, 13) fixed at a distance from one another in a rotationally fixed manner on a rotatingly driven main shaft (9), which are in rolling contact with the packaging blanks on the transport path (15) at an application point (49). To remove the handles (19) from a magazine (18), two suction heads (27) are provided which can be moved to and fro by a toothed segment gear (34, 36) and by a cam drive (43, 44) provided in the drive disks (12, 13) , which transfer a handle (19Δ) in a transfer area (46) at peripheral speed to the peripheral surfaces (26) of the drive disks (12, 13), from where the handle (19Δ) passes through the peripheral surfaces (26) of the drive disks (12, 13) ) submersible driver (22) is taken to the application point (49). Two guide strips (45) partially surrounding the circumference of the driver disks (12, 13) hold the handles (19Δ) on the disk circumference. The drive of the main shaft (9) is connected to the drive of the conveyor belt via a double crank gear.

Description

- a magazine for a stock of material blanks in stack form,

- One arranged around a rotatably driven main shaft and at an application point in unwinding contact with the packaging blanks moved on the conveyor belt, Essentially cylindrical support surface for guiding the material sections over the packaging blanks generally provided with glue,

- between an acceptance position at the end of the issue of the magazine and a transfer area on the support surface movable back and forth Suction heads for the individual removal of material sections from the magazine and for their transfer to the support surface,

- Means for taking away the material sections on the support surface from the transfer area and for holding the material sections on the support surface up to the application point, as well as

- Drive means for driving the device ir synchronization with the drive for the Transport track,

characterized in that the support surface of at least two at a distance rotatably with the main shaft (9) connected driver disks (12, 13), the suction heads (27) after Removing the material sections can be moved in the direction of rotation of the driver disks (12, 13), wherein the suction heads in the transfer area (48) with their suction surfaces to the level of the unifang (26) of the driver disks (12, 13) can be lowered, and the means for taking along the material sections (19 ') from the peripheral surfaces (26) of the driver disks (12, 13) emerge from driver stops (22) exist.

2. Apparatus according to claim 1, characterized in that the driver stops (22) are movable attached to the driver disks (12, 13) and in their sequence of movements through fixed next to the frame the drive disks (12, 13) arranged cam disks (25) are controlled.

3. Device according to one of claims 1 or 2, characterized in that the means for holding of the material sections (19 ') fixed to the frame on the peripheral surfaces (26) of the Mitnehnierscheiben (12,13) arranged guide strips (45), which are at a small distance along the peripheral surfaces (26) of the Drive disks (12, 13) run.

4. Device according to one of claims 1 to 3, characterized in that the suction heads (27) in their radial movement with respect to the drive disks (12, 13) in ICurvennuten (44) of the drive disks (12,13) and for the rest of the execution of their to-and-fro movement are attached in the circumferential direction to pivotable push rods (41), which via a gear are driven by the main shaft (9).

5. Apparatus according to claim 4, characterized in that the gear for the peripheral drive the suction heads (27) consists of:

a) a pivoting axis (28) rotatably mounted in the frame (1,2), which is fixed to it via a connected radial arm (30) in engagement with a control cam mounted on the main shaft (9) (33) stands, and

b) a toothed segment (34) which is fixedly attached to the torsional oscillation axis (28) and which with a gear (36) rotatably mounted on the main shaft (9) meshes with which a Rocking lever (38) is firmly attached, which is articulated with the push rods (41) of the suction heads (27) is connected.

6. Apparatus according to claim 5, characterized in that that the rocker arm (38) is outside the circumferential area of the drive plates (12, 13) between the removal position (47) of the suction heads (27) and the application point (49) and in the aforementioned Circumferential area as a support disk (37) with the diameter of the drive disks (12, 13) is designed, which serves as additional internal support for the material sections (19 ')

7. Device according to one of claims 1 to 6, characterized in that two drive plates (12, 13) and two suction heads (27) are provided.

8. Apparatus according to claim 7, characterized in that the driver stops (22) to the the outer sides of the drive disks (12, 13) facing away from one another are attached, the suction heads (27) are guided on the inner sides of the driver disks (12, 13) and the support disk (37) is centered between the drive disks (12, 13) is arranged

9. Device according to one of claims 1 to 8, characterized in that the rotary drive for the main shaft (9) contains a double crank gear with a coupling member (52) to reduce rotational delays to be provided if the length of the packaging blanks corresponds to the circumference of the drive plates (12, 13) differs

The invention relates to a device for applying flat material sections, in particular prefabricated handles on continuously moved along a transport path in a certain sequence, flat blanks for packaging, with

a magazine for a supply of the material blanks in stack form,

one arranged around a rotatably driven main shaft and in rolling contact at an application point with the packaging blanks moved on the transport path, essentially cylindrical support surface for transferring the material sections to the generally packaging blanks provided with glue,

between an acceptance division at the output end of the magazine and a transfer area at the Support surface that can be moved back and forth

for the individual removal of material sections from the magazine and their transfer on the support surface,

- Means for taking along the material sections the support surface from the transfer area and for holding the material sections on the support surface to the point of application, as well as

- Drive means for driving the device in synchronization with the drive for the conveyor belt.

Devices of this type are already in industrial use Has been used in practice, but these devices which have already been used are not satisfactory Working method, especially at high working speeds, and are also not straightforward Adaptable to packaging cuts of different lengths. The handles, which are mainly used with the Device to be applied to packaging blanks, it is z. B. to such as in the subsequently published German utility model 81 16 659.1 are described by type.

From DE-AS 11 57 998 a device of the type characterized at the outset is known. In this known one The device moves the squeegee essentially exclusively in the radial direction on the Drum closed, the label held by the squeegee in relation to the circumferential movement of the drum remains at rest The label is only swiveled with one edge in contact with the drum, the suction bar with its suction surface in no way moves to the level of the drum circumference. The driver device in the form of a pivotable pressure roller is located in the direction of rotation the drum at a considerable distance in front of the suction bar.

Such a device is for a precisely fitting application of relatively narrow material sections, such as they represent, for example, handles, but not suitable because: ie material sections of a certain Requires width in the circumferential direction of the drum so that the label held by the suction bar on his brought into contact with the drum free end can even be detected by the pressure roller. Narrower sections that do not bridge the considerable distance from the squeegee to the pressure roller, cannot be processed with the device. Furthermore, it is with the known device hardly possible to attach labels with a precise fit on a certain point, as it is with the known The device depends entirely on the sequence of movements of the pressure roller, at what point exactly that Label is detected and pulled from its rest position from the squeegee. Since the friction conditions change can, even with a precise movement of the pressure roller, the trigger time for never allow the label to be determined in advance. Another disadvantage of the known device is that the Material sections from the rest position au! Drum speed suddenly need to be increased.

In contrast, the object of the invention is to create a device for applying material sections which on the one hand allows relatively narrow sections to be processed, as represented by handles, and which on the other hand is able to fit even such narrow sections precisely on emn Apply carrier.

According to the invention, this object is achieved by a corresponding device which has the features of the characterizing part of claim 1. Advantageous further developments of the invention are claimed in the subclaims
The advantages of the new device are, in part, that the driver disks which apply the material sections to the packaging blank can themselves be kept in continuous rotation and the removal of the material sections

! 0 their rest position in the magazine and the transfer to the drive plates by separately movable suction heads takes place here, the material sections do not even need to reach the peripheral speed through the suction heads of the drive plates to be accelerated, as the sections after being released from the Suction heads by means of suitable detachable driver stops on the driver disks with safety taken over by the suction heads and carried along in the rotating circumferential movement.

Because the mower discs are in the moment of application of a material section <v. »for the packaging blank must be in rolling contact with essentially the same path speed is at a uniformly rotating drive of the collector disks the largest length to be processed Packing blanks, insofar as these blanks are not flaked on the conveyor belt the scope of the drive plates of the claimed device is limited to such a limitation to eliminate is the drive with a particularly preferred embodiment of the device Double crank gear provided, which leads to a non-uniform rotational movement of the drive plates leads, the arrangement of the double crank and the associated coupling is designed so that the peripheral speed of the drive disks at the point of application practically the feed speed of the packaging blanks on the transport path is equivalent to

It is true that the sequence of movements of the transport path and the device described is essential continuously, but there is still a quasi-clocked mode of operation, since everyone arrives on the transport track The packaging cut can be attached to the correct position, for example with the handle got to. If the transport track has places that are not occupied by a packaging blank, then it can a coordinated skipping of the removal of a material section from the magazine by missing Application of the suction heads can be brought about by vacuum. Others are of course also Control measures to achieve this purpose are possible. The same spacing of the packaging requirement on the transport track can be achieved by chain drives that are provided in The last-mentioned measures are not direct, however Subject of the invention and are therefore in the following description of an embodiment also not explained in detail.

In the following preferred embodiments of the device with reference to the drawings explained in more detail in the drawings represents

F i g. 1 is a schematic side view of the device for applying material sections which essentially functionally form the movement trajectories illustrate the device;

F i g. 2 shows a horizontal section through the device, essentially along the line U-II in FIG. 1; and

3 shows an alternative drive for the embodiment of the device according to FIG. 1 and 2, the one Includes double crank gear for uneven motion.

The apparatus consists, essentially with reference to FIG. 2, from two side walls 1 and 2, which are shown in the right part of FIG. 2 are shown broken off, but are connected to one another by means of screws 4 on the left-hand side by a crossbar 3, which is also shown broken off. As shown in FIG. 1, 5 suspension brackets 6 are screwed to the crossbeam 3 by means of screws, of which in the plan view of FIG. 2 only one is shown, with which the device on (not shown) cross bars of the ZUSSh ^ ri ¹ "*! ¹ machine are aufuehänst can. On their right-hand sides in relation to the drawings, the side walls 1 and 2 or transverse parts (not shown) connecting them to one another can also be provided with fastening means (not shown) be. The device is expediently designed to be even higher inadjustable in terms of its suspension to be able to arrange them at the correct height distance from the packaging blanks being moved on the conveyor belt.

As also from FIG. 2 is apparent in the side walls 1 and 2 by means of roller bearings 7 and 8 a Main shaft 9 rotatably mounted. At its end located on the other side of the side wall 2 is on the main shaft a drive gear 10 is keyed, the teeth 11 with a (not shown) transmission gear of the The entire device combs, which runs synchronously with the drive for the transport path for the packaging blanks.

On the main shaft 9, two drive disks 12 and 13 are wedged at a distance from one another between the side walls 1 and 2 in a rotationally fixed manner with the main shaft 9. annular circumferential surfaces that serve to support the material sections. The drive plates 12 and 13 are held in their respective positions by spacer sleeves 14.

As in Fig. 1 is indicated, the driver disks 12 and 13 are located with their lower apex in the immediate vicinity of the only dash-dotted line indicated transport path 15 for the packaging blanks. The direction of movement of the packaging steps is indicated by an arrow 16, while the corresponding direction of rotation of the driver disks 12 and 13 is indicated by an arrow 17.

The F i g. 1 it can be seen that diagonally above the drive plates 12 and 13, a magazine 18 for the Material blanks 19 are arranged of which only the lowermost of a stack located in the magazine are indicated. Retention pins 20 in the side walls of the magazine, which are slightly in the interior of the Projecting magazine, ensure that each of the lowest material section 19 only against a certain Resistance can be removed from the magazine 18 and the remaining material sections in the magazine be held back. These features correspond to known embodiments. The magazine 18 itself is attached to the side walls 1 and 2 by means of fastenings 21. They are shown in FIG. 1 only the fastenings 21 in connection with the side wall 2

Regarding the arrangement of the magazine, it should also be mentioned that its greater extent is parallel to the main shaft 9 runs so that the material sections removed from it come to rest on both drive disks and span the space between them.

The drive disks 12 and 13 are in the vicinity of their outer circumference and on their outer sides Driver stops 22 are provided, which can be pivoted about pivot axes 23 in the driver plates are. The arrangement of the driver stops 22 with respect to the driver disks 12 and 13 is based on F i g. 2 emerges, while the formation of the driver stops 22 and their arrangement with respect to their Pivot axis 23 best from FIG. 1 can be seen. The driver stops 22 are provided with cam follower rollers 24, which on with the side walls 1 and Roll off 2 cam disks 25 that are fixed to the frame. The driver stops 22 can in different ways, for example by means of a spring or a double guidance of the scanning rollers 24 are kept in constant contact with the cam disks 25. Due to their cam-controlled pivotability, the driver stops 22 can submerge under the circumferential surface of the driver disks 12 and 13, and in areas where this is desired, emerge over the peripheral surfaces of the drive plates, as shown in FIGS. 1 and 2 of the drawing is shown. The in F i g. The course of the cam disk 25 indicated in 1 provides information about the angular ranges in which the circumferential movement of the driver disks this is the case.

For the removal of the material sections 19 from the magazine 18 and their transfer to the circumferential surfaces 26 of the driver disks 12 and 13 are two Suction heads 27 are provided, of which only one is shown in both figures in FIG. i this suction head 27 is shown in a first position on the magazine 18, in which it is about to take over the lowermost material section 19 by applying a vacuum, and in a second position 27 'in which it is already moved in the direction of rotation of the drive plates 12 and 13 and with its suction surface on the level of the Moved circumferential surface 26 of the drive disks for transferring the material section to this surface The vacuum connections required for the suction heads 27 to hold the material sections in place 19 or air connections for accelerated release of the material sections are not shown in the drawings and can be shown in a known manner are executed.

However, the sequence of movements and the drive of the suction heads 27 are important. To explain them, reference should first be made to FIG will.

There, on the left hand side of the drive plates 12 and 13, a torsional oscillation axis 28 is rotatably supported by means of bearings 29 attached to the side walls 1 and 2 outside the side wall 2 with the main shaft 9 is wedged in a rotationally fixed manner. It should be pointed out that the groove cam 32 in FIG. 2 to those Points are shown, which correspond to the horizontal section, while the follower roller 31 laterally of which is shown in a different circumferential position, according to the current arrangement of the transmission parts

Fig. I corresponds. In Fig. 1, the radial arm 30 and the cam 33 is not shown.

When the cam 33 rotates, the groove curve 12 causes the radial arm 30 to move back and forth over a certain angle of rotation and the torsional oscillation axis 28 a certain limited Torsional oscillation executes.

A toothed segment 34 is non-rotatably connected to the torsional oscillation axis 28, the extent of which is better illustrated in FIG. The toothed segment H4 meshes with a toothed wheel 36 rotatably mounted on the main shaft 9 by means of roller bearings 35.

The support disk 37 has the same diameter as the driver disks in areas of its circumference 12 and 13 and is used to provide additional support on the peripheral surfaces 26 of the drive disks 12 and 13 lying material section 19 in the area between the drive plates. Is propulsive but the rocker arm 38 of this disc is important, the outer end of which is fixed to a cross bar 39 is connected, at the ends of which on both sides of the rocker arm 38 by means of roller bearings 40 push rods 41 are articulated, which carry the suction heads 27 at their ends.

According to the representation of only one suction head 27 is also only one in the figures of the drawing SchiSstangeneinrichtung 41 shown. From Fig.2 is on the broken representation of the corresponding parts, however, it can be seen that the second suction head assembly should be designed symmetrically to the rocker arm 38. The push rods 41 themselves are for stabilization still firmly connected to one another by a transverse rod 42.

Since the suction heads 27 or the push rods 4i, to which they are firmly attached, are only articulated at one point are connected to one another with the other drive elements, the suction heads 27 require a second one Guide. For this purpose, the suction heads 27 are provided with cam follower rollers 43 which are in groove cams 44 engage, which are provided in the facing inner sides of the driver disks 12 and 13 are. Corresponding to the cam follower roller 31, the follower roller 43 of the suction head 27 is also shown in FIG. 2 in those projected circumferential position, which corresponds to the left position of the suction head 27 in FIG. 1 corresponds While the push rods 41 essentially move the suction heads 27 in the circumferential direction of the driver disks 12 and 13 cause, the groove cams 44 only serving as a guide, is the alternating one Radial distance of the groove cams 44 from the axis of the main shaft 9 for the corresponding radial movement the suction heads 27 responsible.

So that one of the driver stops 22 on the peripheral surfaces 26 of the driver disks 12 and 1.3 entrained material section, for example the material section 19 'in FIG. 1 in contact with the peripheral surfaces remains, are along part of the circumference of the drive plates 12 and 13 guide strips 45 are provided, which are attached to the side walls 1 and 2 of the device by means of fastenings 46. (See Fig. 1)

The operation of the device is as follows:
In the case of the FIG. 1 position of the suction head 27 shown on the left and the corresponding angle of rotation of the peripheral disks 12 and 13, the curve scanning roller 43 of the suction head 27 is located at the apex of the greatest center distance of the groove curve 44, so that the suction head 27 comes to rest against the lowest material section 19 in the magazine 18 and can hold this by applying a vacuum.

If the driver disks 12 and 13 continue to rotate in the direction of arrow 17, the apex moves the groove curve 44 under the follower roller 43 away, the suction head 27 moving radially inward executes, in which he removes the lowermost section of material 19 over the resistance of the retaining pins 20 removes from the magazine 18.

As the driver disks 12 and 13 continue to rotate, the torsional oscillation axis 28 is controlled through the groove cam 32, a left turn, whereby the toothed segment 34 can rotate freely on the main shaft 9 mounted gear 36 and the rocker arm 38 fixed to it given a clockwise rotation, the leads to the fact that the end 39 of the rocker arm 38 reaches its position 39 'and the push rod 41 also shifts to its position 4Γ, whereby the suction head 27 is guided by its scanning roller 43, in the circumferential direction of rotation of the driver disks 12 and 13 in FIG. 1 position 27 'shown on the right will. The curve guidance by means of the scanning roller 43 or 43 'causes the suction head 27 to open at the same time the circumferential level 26 of the drive disks 12 and 13 is lowered. Approximately in its marked by 27 ' Position lets go of the suction head, the material section, so that this on the peripheral surfaces 26 of the Driving plates lying on top, can now be taken over by these. Then the radial arm causes 30 of the torsional oscillation axis 28 again a reverse rotation of the gear segment 34 and the gear 36, so that the suction head 27 returns to its removal position 47 on the magazine 18. The or the Suction heads 27 move accordingly to one another full rotation of the drive plates 12 and 13 between the removal position 47 and the right in

F i g. 1 shown transfer area 48 back and forth.

According to FIG. 1, the driver stop 22 has the material section discharged from the suction head 27 ' 19 'has already been taken over and guides it on the circumferential surfaces 26 of the drive disks 12 and 13 in a clockwise direction of rotation further with it, the material section 19 'being supported by the guide strips 45 fixed to the frame in System is held against the peripheral surfaces 26 of the drive disks. Before the driver stop 22 has taken over the material section 19 'in the transfer area 48, it was under the circumferential surface of the Driving plates submerged The appearance of the driving stop 22 must, however, before the 27 ' designated position of the suction head, so that the driver stop the material section 19 'from Suction head 37 'can take over. This sequence goes clearly from the center line of the groove curve 25 in F i g. 1 emerged.

The material section 19 'is moved from the transfer area 48 through the driver stop 22 to the application point 49 taken along in the area of the lower apex of the drive plates. It is important, that the driver stop 22 here early enough again under the circumferential surfaces 26 of the driver disks 12 and 13 immersed, and that also the guide strips 45 end in good time before this point at which the material section 19 'is generally under counter pressure from below on one with the peripheral speed of the drive disks 12 and 13 to the

$ i This point moved packaging blank in the hatchet rich in a generally pre-glued glue point

_v >; is applied. The type of application of the counter

■! · 'Pressure on those moved on the transport path

-: ■■ Packaging blanks from below can be

■■! | can be done in different ways and

V: is not directly the subject of this application.

f It is essential that at the application point 49 by the

'· / Drive plates 12 and 13 or by the front

p direction of downstream pressure means a sufficient

^1M the surface pressure is exerted on the parts to be connected, so that a durable adhesive is created.

A very advantageous variant of the ■: i Device is shown in Fig.3. Appropriate

; i parts of the device described so far are there

Designated with the same reference numerals Only the bearing 29 'for the torsional oscillation axis 28 is from space - ^ bases laid on the inside of the side wall 2

been. The cam 33 cannot be seen either; it is on the other, not shown, side i. the device has been relocated.

The other components of FIG. 3 represent a double crank gear interposed in the drive of the device, which in additional frame ■; len 50 is held.

Outside the side wall 2 is on the main shaft 9 Ε? a drive crank 51 is attached in a rotationally fixed manner

■> ':' articulated via a coupling 52 with a drive crank

* (·. 'Disk 53 connected. The drive crank disk 53 is

'.i in turn connected to a drive gear 54

(flanges which by means of a flange bearing arrangement

55 is rotatably mounted on the frame parts 50. The toothing 56 of the drive gear 53 is provided for this.

% hen, corresponding to the gear 10 according to FIG. 2 with a

i | nem (not shown) gear of the overall drive

■ 1 Plant to be engaged.

ψ < The double crank mechanism makes it possible for a

β full revolution of the main shaft 9 the transport path

U 15 to keep running a distance that is greater

fe or smaller than the circumference of the drive plates

P- 12 and 13. In the case of the double crank gear

% produced irregular rotary motion of the

P merscheiben 12 and 13 should only be taken care of P ₁ will be that the peripheral speed of the disks

| j at an angle of rotation at which the material section

! ^ 19 'at the point of application 49 of the drive disks

* i is issued, the speed of movement

; ■] the packaging blanks on the conveyor track 15

ig corresponds to This arrangement, although an un-

generates uniform rotary motion of the device, nevertheless, the advantageous embodiment is retained in which the material sections by means of a continuously rotating component can be applied to the packaging blanks without on the conventional cyclical workflow must be used discontinuously to and fro gear members.

For this purpose 3 sheets of drawings ω

Γ.5

Claims (1)

Patent claims: 1. Device for applying flat material sections, in particular prefabricated handles on along a transport path in certain Follow continuously moving, flat blanks for packaging with