EP2937211B1 - Device for compressing containers - Google Patents

Description

The invention relates to a device for compressing / compacting containers, in particular cans made of tinplate, in particular beverage cans, according to the preamble of claim 1. Such devices having one or more work rolls are used to empty containers (hollow body), in particular those from the food industry, like beverage cans and the like Containers, to compact. Thus, the transport volume of the vehicle is better used for transport to the recycling facilities; the transport costs are reduced. But compact containers are also an advantage for the recycling process itself.

A long-known on the market compacting device is in the DE 85 15 290 U1 described. This device has at least one roller for compressing and perforating empty containers, wherein of the main body project the spines radially out of the roller. The spikes are mounted in radially aligned receptacles of the roll main body.

In the DE 103 25 368 B4 discloses a compacting device for beverage containers in the form of plastic bottles and (white) tin cans comprising two counter-drivable rolls arranged in parallel spaced relationship and configured to squeeze empty containers between them and point them towards the rolls Lateral surfaces are partially cut. For this purpose, each roller has a plurality of discs along a roller axis. One part of the disks is designed as a pressure disk, the other part of the disks as a cutting disk. In addition, the rollers are arranged such that cutting discs of a roller engage in spaces between the discs of the other roller, so cutting discs mesh with each other. By an opposite movement of the rollers, an empty container is pulled into the nip between the rollers and compressed by the plurality of pressure and cutting discs and partially cut. This allows in particular the compacting of empty, closed containers without having to perforate them before.

A device for compressing containers, in particular PET bottles and tin cans describes the DE 20 2008 008 568 U1 , This device has a motor rotatably driven roller, which lies opposite a curved abutment surface. The distance between this abutment surface and the peripheral surface of the roller decreases in the direction of rotation of the roller, so that forms a wedge-shaped narrowing space in the direction of rotation of the roller. The peripheral surface of the roller is composed of juxtaposed flat surface portions. At the abutting edges between the individual surface portions radially outwardly extending driver elements are arranged, which may for example have the shape of strips. These strips extend over the entire length of the roller and are straight. Depending on the nature of the planar surface portions of the roller peripheral surface, the entrainment bars extend either parallel to the axis of the roller or obliquely thereto.

Other devices for compacting containers are in the JP 11 170095 A and the FR 2 501 535 A1 described. Both devices have two opposite to each other driven rollers, between which a pull-in gap is formed for empties to be compacted. On the peripheral surfaces of the rollers feeder elements are arranged, inter alia, in the roll longitudinal direction over the entire roll length extend and are arranged parallel to each other. These feeder elements have the shape of a V whose tip is directed counter to the direction of rotation of the rollers.

Another device for compacting empty cans is in the JP 2004 322196 A disclosed. This device has two counter-rotating rollers between which a nip for the collection of empty cans is formed. Both rollers have helically on their peripheral surface circumferential strips as catchment elements. In this device, the compressed body ejected from the device are now flat with respect to their original shape, but they are particularly strongly curved in a banana shape.

There is still a demand in the market for more efficient devices for compacting hollowware / containers from the food sector. Where efficiency is also understood as an extension of the maintenance intervals and a reduction of the maintenance effort.

From the JP H04 182097 A a device for compressing containers with two parallel and counter-rotating pressure rollers is known in which on the lateral surface of at least one of the pressure rollers strip-shaped elevations are provided which extend at an angle to a surface line.

From the US 3,406,624 A a roller assembly according to the preamble of claim 1 is known, with strip-shaped running at an angle elevations on only one of the two pressure rollers, wherein the roller pair is used for crushing wood chips.

From the WO 2006/094819 A2 Further, a pressure roller pair for compressing, for example, PET bottles is known in which strip-shaped projections are provided with a cross-sectional shape of overhanging teeth and engage the teeth of a pressure roller in the spaces between the teeth of the other pressure roller.

Based on the solutions of the prior art, a device for compressing containers, in particular beverage cans or tin cans from the food sector, at least assemblies for such devices, to be found, which a reduction the production costs and the operating costs in the application causes, in particular achieved energy savings. In addition, the quality of the compressed hollow body / container for the subsequent recycling process and the devaluation of deposit disposable containers should be improved.

The object is achieved by a device for compressing containers, in particular beverage cans or tin cans from the food sector, with the features of claim 1.

The subordinate claims, the claims 2 to 12, disclose embodiments of the device according to the invention.

Compared to known solutions, the advantages of the invention are in addition to the savings in the manufacture of the device, such as e.g. the manufacturing cost of the rollers, the assembly cost of the device and the energy savings for the production of the device parts, while also reducing the operating costs of the user, in particular by energy savings in the operation of the device of up to 50%, through lower maintenance and u.a. due to less wear on the rollers.

In addition, with the inventive Device compressed body higher dimensional stability, so that occur in the subsequent recycling process, inter alia, less interference in the promotion of compressed bodies; in the recycling machines themselves and also to the recycling machines.

In addition, wrinkles with small radius in the compressed body wall and bottom are largely avoided when squeezing the container, so that the number of white fractures in the material, ie in the flattened body walls of the container is substantially reduced. At the same time, however, it is ensured that the devaluation of deposit containers is reliable, that is, the barcode attached to the outer surface of the containers / hollow body is invalidated.

One aspect of the invention is a newly designed pressure roller for the device according to the invention, which is profiled in the periphery of its working area, ie in its lateral surface, in a new way.

This pressure roller according to the invention is provided in duplicate in the new device. The two pressure rollers are rotatably mounted, which are arranged to form a gap at a distance from each other. The gap is arranged parallel to the respective axis of rotation of the pressure rollers. Initially, this gap is the nip, then - directly between the pressure rollers - the working gap and then the outlet gap, which opens into a provided in the housing of the device outlet opening.

In or on the respectively substantially cylindrical lateral surface of the roller base body of these new pressure rollers, a plurality of longitudinally from one end face to the opposite end face of the body of the pressure rollers reaching strip-shaped elements are provided.

Preferably, these strip-shaped elements, which are according to the invention multiple-action elements for the feeder, for a possibly necessary perforation of the containers, for compression and ejection, formed by in the lateral surface of each pressure roller longitudinally arranged grooves. So between each two adjacent grooves a strip-shaped active element is arranged / formed. The grooves are of the same type and width and guided substantially parallel to the axis.

Preferably, the grooves and thus also the strip-shaped active elements are distributed uniformly distributed on the circumference.

In the apparatus according to the invention, the strip-shaped active elements of each pressure roller are each arranged divergently at an angle of attack to a reference line extending parallel to its axis of rotation in the lateral surface.

According to embodiments of the invention, the angle of attack of each strip-shaped active element is the same, preferably has a value between 0.1 ° and 40 ° and in particular a value of 15 °.

According to a further embodiment of the invention, the strip-shaped active elements, seen in cross-section, are trapezoidal. In a first type / embodiment, the trapezoidal shape is not symmetrical, and in a second type / embodiment, the trapezoidal shape is symmetrical, i. the side surfaces of the trapezoid are here isosceles. This trapezoidal shape is in each case formed by outwardly directed spaced apart and opposite side surfaces which are connected at the top, ie at their upper ends / edges by a pressure surface. This pressure surface is advantageous in each case the part of the lateral surface of each pressure roller, which is not broken by the incorporation of the grooves. The printing surface is one of the bases of the trapezoid. The other, the lower base of the trapezoid, is formed by a (virtual) tangent which rests against the periphery of a circle whose radius is determined by the bottom of the adjacent groove.

In the embodiment with the non-symmetrical trapezoidal shape of the strip-shaped active elements is the front lying, so the pointing in the direction of rotation side surface of Acting elements arranged at an inclination angle to a radius line which extends through the edge formed by the intersection of this front surface and the adjacent upper pressure surface. This angle of inclination is preferably in a value range between 1 ° and 20 °, in particular between 8 ° and 12 °.

In a further improved embodiment, the radius line delimiting the angle does not extend through the said edge but 0.1 mm to 1.5 mm from said edge of the strip-shaped active element in the body.

The height of these strip-shaped active elements, preferably based on the bottom of each lying next to her groove, preferably has an amount of 2 to 6 mm, in particular, this height is 4.25 mm.

The front side lying in the direction of rotation of the strip-shaped active elements and the rear side surface of each hurrying strip-shaped active element are mutually lying at an angle between 70 ° and 30 °, preferably at an angle of 54 ° to 62 °.

In a further embodiment with the symmetrical, the isosceles trapezoidal shape of the strip-shaped active elements in the direction of rotation of the pressure roller front side lying side surface is arranged at an inclination angle to a radius line, which the strip-shaped active element divides symmetrically. This angle of inclination is preferably in a value range between 15 ° and 45 °, between 25 ° and 40 °.

The height of the strip-shaped active elements, preferably based on the bottom of each lying next to her groove, preferably has an amount of 2 to 5 mm, this height is advantageously 3.5 mm.

The front side lying in the direction of rotation side of the strip-shaped active elements and the rear side surface of each hurrying strip-shaped active element are mutually lying at an angle between 120 ° and 60 °, preferably at an angle of 82 ° to 95 °.

Preferably, the pressure rollers are made according to the invention of solid material and tempering steel and their lateral surface together with the strip-shaped active elements are at least surface hardened.

A further embodiment of the invention is such that the journals of the pressure rollers guided through side walls and guided and held in outward side walls are at least two sealed with respect to the respective openings in the side walls by at least one radially acting seal and at least one axially acting seal.

Fig. 1

eine schematische Seitenansicht einer Vorrichtung nach der Erfindung, mit Blick in den Arbeitsraum dieser Vorrichtung;

Fig. 2

die zueinander angeordneten Druckwalzen der Vorrichtung nach Figur 1;

Fig. 2a, 2b, 2c

Details der Druckwalzen nach Figur 2;

Fig. 3

die Druckwalzen nach Figur 2 mit einer ersten Ausführung von leistenförmigen Wirkelementen;

Fig. 3a

Details zu Fig. 3;

Fig. 4

die Druckwalzen nach Figur 2 mit einer zweiten Ausführung von leistenförmigen Wirkelementen;

Fig. 4a

Details zu Figur 4;

Fig. 5

eine perspektivische Ansicht von Druckwalzen der erfindungsgemäßen Vorrichtung mit leistenförmigen Wirkelementen zweiter Ausführung;

Fig. 6

in Schnittdarstellung die Lagerung der Druckwalzen der neuen Vorrichtung mit neuartiger Dichtung;

The invention will be explained in more detail and in more detail with reference to exemplary embodiments shown schematically in drawings, but not limiting the invention. Show it

Fig. 1

a schematic side view of a device according to the invention, with a view into the working space of this device;

Fig. 2

the mutually arranged pressure rollers of the device after FIG. 1 ;

Fig. 2a, 2b, 2c

Details of the pressure rollers after FIG. 2 ;

Fig. 3

the pressure rollers after FIG. 2 with a first embodiment of strip-shaped active elements;

Fig. 3a

Details too Fig. 3 ;

Fig. 4

the pressure rollers after FIG. 2 with a second embodiment of strip-shaped active elements;

Fig. 4a

Details too FIG. 4 ;

Fig. 5

a perspective view of pressure rollers of the device according to the invention with strip-shaped active elements of the second embodiment;

Fig. 6

in section, the storage of the pressure rollers of the new device with novel seal;

In the following description of the embodiments, terms such as "top", "bottom", "left" and "right" refer only to the figures in question and thus may differ from reality. Also, the proportions in reality may be different from the figures. Furthermore, the figures are not exact technical drawings but are merely intended to show the character of the invention. With respect to the reference numerals, it is noted that the same numbers in the various figures always refer to the same components. Reference numerals not mentioned in the description will be apparent from the list of reference numerals or from the mention in another figure of this disclosure. The reference numerals drawn in the figures have the same meaning each, even if they are not explicitly mentioned in the description of the embodiments for each figure.

A schematic side view of a device having a pressure rollers 5 according to the invention and a pressure roller 6 according to the invention is shown in FIG FIG. 1 shown. One of the lateral housing walls is here removed, so that the view falls into the working space of the device.

In a housing 2, a filling opening 3 is provided on one side in an upper region, for the throw of said containers / hollow bodies to be recycled 15. In the upper inner area is a feed space 3a, in the lower part of this housing 2, following the Feed chamber 3a is the first pressure roller 5 is arranged and opposite her parallel and spaced the pressure roller 6, which is equal to the pressure roller 5 according to the invention in type and design. It, the pressure roller 6, is rotated only by 180 °, so that the left end side of the pressure roller 5 is then the right end side of the pressure roller 6.

The pressure roller 5 and the pressure roller 6 form a gap 9 between them. It is the intake, working and ejection gap at the same time. The containers 15, 16 to be pressed together are successively introduced via the filling opening 3 into the feed space 3a and slide over the chute 10 towards the gap 9. A driving unit 7 is arranged in the feed space 3 a and supports with each one of its wings 71, 72 and 73, which move in accordance with arrow 11, the feeding of the inserted container 15 or 16 to the gap 9, which is the nip, out, these wings push the container in the direction of the gap 9 and at the same time press on this nip, as long as they have contact with the container.

By the counter-rotating pressure rollers 5 and 6, i. by their strip-shaped active elements 59 and 69, which act cross-wise according to the invention in the nip and working gap, the inserted containers are safely retracted and compressed. The pressed against each other portions of the wall of the container, which is then double-layered in the working gap, is reliably compacted according to the already preceding versions. Any existing pledges are validly canceled. The double-layered in the compressed state body receives at least partially an embossed shape, which is such by the rotation and arranged in a new kind strip-shaped active elements that quasi an entanglement of said sections. According to the strip-shaped active elements, here in the embodiment shown, the strip-shaped

Knitting elements 59 and 69 of the pressure roller 5 and 6, arranged so that they have the same angle of attack W1. When installing / mounting these pressure rollers in the device is important to ensure that this angle of attack W1 on both pressure rollers, ie for the respective strip-shaped Acting elements is approximately equal.

In the in FIG. 1 As shown (a snapshot of the working device), it is the wing 73, which presses the container / hollow body 16 to the pressure rollers 5 and 6 and in the feed section of the gap 9. The subsequently supplied container 15 is shown in two positions. Once at the throw in and in a later position P; Here, the longitudinally inserted container 15 is shown with a dashed line for distinction. He now lies transversely, ie in its longitudinal direction parallel to the pressure rollers 5 and 6 and the nip formed between them and waits in this position P on the transfer to the nip of the nip 9 by progressive slipping along the chute 10 and / or the back of the Vane 73. The subsequent vane 72 will then, upon further rotation of the entrainment unit 7 about its axis of rotation 70, also push the container 15 towards and into the nip 9, as shown in this figure with respect to the container 16.

Preferably, the driving unit 7 is a separator according to the EP 2 292 333 A2 or the US 7,540,235 B2 , Not shown here are known per se and belonging to a generic device assemblies and components, such as a transmission and a motor and a control unit, which needed to operate the device and are also provided here.

In the FIG. 2 are a schematic view of the mutually arranged pressure rollers 5 and 6 of the new device FIG. 1 shown in plan view. It has a rotation axis 51, laterally bearing pins 56 and 57 and between the left end face 54 and the right end face 55 a roller body with a lateral surface 53. Further details are in the FIG. 2a with respect to the detail A shown. In the lateral surface 53, a plurality of grooves 58 are longitudinally embedded. These grooves 58 are uniformly distributed on the circumference of the first pressure roller 5. Between each two grooves, a strip-shaped active element 59 is formed, which also extends longitudinally from the left end face 54 to the right end face 55.

In this FIG. 2 is under the first pressure roller 5, the second pressure roller 6 is arranged at a parallel distance from the aforementioned first pressure roller 5. The distance between the two pressure rollers 5 and 6 is the gap 9 (see also FIG. 1 ). The second pressure roller 6 has a rotation axis 61, laterally bearing journals 66 and 67 and between the left end face 64 and the right end face 65 a roller body with a lateral surface 63.

More details are in the FIG. 2b with respect to the detail B shown. In the lateral surface 63, a plurality of grooves 68 are longitudinally embedded. These grooves 68 are uniformly distributed on the circumference of the second pressure roller 6. Between each two grooves, a strip-shaped active element 69 is formed, which also extends longitudinally from the left end face 64 to the right end face 65.

In the Figure 2c Here, with respect to detail B, further details of the pressure rollers are shown. The strip-shaped active elements of the pressure rollers - shown here by way of example on the pressure roller 6 - are diverging at an angle of attack W1 to a parallel to its axis of rotation 61 in the lateral surface 63 extending reference line. The strip-shaped active elements - in this case the elements 69 - are aligned in a straight line from the left end face 64 to the right end face 65.

In the Figures 3 and 3a the pressure rollers 5 and 6 are equipped with strip-shaped active elements 59 and 69 according to a first embodiment. By the reference numerals 52 and 62, the respective direction of rotation is designated. The strip-shaped active element 59, which is respectively arranged between two grooves 58, has a front side surface 12, which is also referred to as a front surface, and an opposite side surface 14, which is shown in FIG Further also back surface is called. Body outward, so the head, both side surfaces are connected by the remaining portion of the lateral surface 53 with each other. This section of the lateral surface 53 is the pressure surface 13.

The front surface 12 is disposed at an inclination angle W2 to the radius line passing through the edge formed by the intersection of the front surface 12 and the adjacent uppermost pressure surface 13. This inclination angle W2 is preferably about 10 ° in this embodiment. The front surface 12 and the back surface 14 of the leading strip-shaped active element are preferably arranged to one another at a distance angle W3 of preferably approximately 58 °.

The in the FIG. 3 Also shown second pressure roller 6, which is inventively arranged quasi mirror image to the pressure roller 5 in the device has, as already said, the same shape / shape. There, the strip-shaped active elements 69 have a side surface / front surface 20, a side surface / back surface 22 and a pressure surface 21. The inclination angle W2 of the front surface 20 and the distance angle W3 are in the same manner and design as in the first pressure roller 5. Between two adjacent strip-shaped active elements 69 is also in this Pressure roller 6 each have a groove 68 is arranged.

In the FIG. 4 and 4a are the pressure rollers, here the pressure rollers 30 and 40 equipped with strip-shaped active elements 35 and 45 according to a second embodiment. By the reference numerals 32 and 42, the respective direction of rotation is designated.

Each strip-shaped active element 35 arranged between two grooves 34 has a front side surface 39, which is also referred to as a front surface, and an opposite side surface 37, which is also referred to as a back surface. Externally both side surfaces are connected by the still standing portion of the lateral surface 33 with each other. This section of the lateral surface 33 is the pressure surface 38.

The front surface 39 is arranged at an inclination angle W4 to the radius line, which divides the strip-shaped active element 35 symmetrically. This inclination angle W4 is preferably about 35 ° in this embodiment. The front surface 39 and the back surface 37 of the leading strip-shaped active element 35 are preferably at a distance angle W5, see FIG FIG. 4a , arranged by preferably about 89 °.

The in the FIG. 4 Also shown second pressure roller 40 of the second embodiment, which is arranged quasi mirror image to the first pressure roller 30 of the second embodiment in the device has, as stated earlier, the same shape / shape. There, the strip-shaped active elements 45 have a similar shaped front surface 49, back surface 47 and pressure surface 48, which are not specifically designated in this figure, the reference numerals 37, 38 and 39 of the first pressure roller 30 second embodiment have the same meaning on this second pressure roller 40.

The inclination angle W4 of the front surface 39 and the distance angle W5 are of the same type and construction as those of the first pressure roller 30 of the second embodiment.

That in the FIG. 4 shown roller pair with the pressure rollers 30 and 40 according to the invention is in the FIG. 5 shown in a perspective view. The view goes to the left end faces 90, 92 with the bearing pins 36 and 46. In this view, it can be clearly seen that the longitudinal strip-shaped active elements - here by the reference numerals 35 and 45 - Although a same directed angle of attack W1 (not shown here) have , but then intersect in the gap 9 (in the catchment area, in the working area and in the ejection area).

Due to the similar structure of the pressure rollers 30 and 40, their mirror image installation in the device and their opposite direction of rotation, this effectively advantageous "crossing" of the strip-shaped active elements in a simple manner and also realized cost. This advantage also results in the pair of rollers according to the first embodiment, which is formed from the pressure rollers 5 and 6, which, for example, in the FIG. 2 is shown.

The "intersecting" of the strip-shaped active elements in the gap 9 formed between the pressure rollers 5 and 6 or 30 and 40 and the further details of the shape of the strip-shaped active elements and their arrangement on or in the lateral surface of the pressure rollers and their position under a Incidence angle W1 to the paraxial in the lateral surface of the pressure roller with respect to its axis of rotation have a particularly positive effect on a trouble-free insertion of the container between the pressure rollers and on the secure hooking of the pressed wall sections of the container. The flat pressed by the compression between the pressure rollers container remain in this generated state. Compared to the known devices is achieved with the device according to the invention to the flattened containers a much higher dimensional stability, also the number of bending edges with a small radius in the body wall of the compressed container is reduced by a multiple, so in particular the emergence of value-reducing white fractions in of the Body wall and / or a "chipping" or a protruding small, partly quasi-cut wall sections is avoided.

In the FIG. 6 is a schematic sectional view of a further embodiment of the new device according to the invention shown by which in particular the maintenance and maintenance interval is positively influenced because suspended solids and liquids from the working space of the device much better than in known solutions from the bearings for the journals of the pressure rollers become. In particular, it is provided according to this embodiment, that inside of the passage opening 86 for a bearing journal - here the bearing pin 67 of the second pressure roller 60 after FIG. 2 - On the inside 82 of the bearing plate 80 at least one axially acting seal 85 and in the region of the outer side 81 of the bearing plate 80 on the passed through the through hole 86 bearing pin 67 at least one radially acting seal 84 is arranged.

This second, radially acting seal 84 is not directly adjacent to the outer side 81 of the bearing plate. This ensures that eventually the axially acting seal 85 still passing suspended solids and liquids in the region of the passage opening 86, which - in the installed position - has an additional longitudinal groove in the lower point, which is also preferably inclined to the horizontal, are dissipated down. The longitudinal groove, not shown in the figure acts to support this, it forms a receiving joint for these suspended solids and liquids.

The invention is not limited to the illustrated and described embodiment, but in particular also includes variants that can be formed by combining features or elements described in connection with the present invention. Furthermore, individual features or modes of operation described in conjunction with the figures can in themselves constitute an independent invention.

Another feature according to an embodiment of the invention is one or more circumferential grooves which in the lateral surface of at least one of the two cooperating pressure rollers 5, 6; 30, 40 are incorporated, for example, such grooves, as in the FIG. 2 in the pressure roller 5 and in the FIG. 5 can be seen in the pressure roller 30.

These grooves arranged transversely to the longitudinal direction of the pressure roller preferably extend to the bottom of the longitudinal grooves 58, 68, 34, 44, respectively. The depth of these transverse grooves is determined inter alia by the material of the containers to be compressed (beverage cans and the like).

These transverse grooves divide each strip-shaped active element 59, 69, 35 and 45 into several, at least two sections.

According to the invention, these transverse grooves can be arranged distributed uniformly, in pairs or in groups over the entire length of a pressure roller.

According to a further, not shown in the figures embodiment of the invention, it is provided that at least on one of the pressure rollers of a pair of rollers strip-shaped active elements of the first embodiment and second embodiment are arranged side by side alternately or in groups over the circumference of the pressure roller distributed. This means that a strip-shaped active element has a non-symmetrical trapezoidal shape (cross section) and the adjacent strip-shaped active element has an isosceles trapezoidal shape (cross section). These two types of strip-shaped active elements can also be arranged successively in groups. To the Example of two strip-shaped active elements with non-symmetrical trapezoidal shape follow three strip-shaped active elements with isosceles trapezoidal shape. In the context of the invention, any other group-wise arrangement of these strip-shaped active elements is conceivable. Which of these embodiments is used is also dependent on the material of the container to be compressed, for example beverage cans and the like, their shape and wall thickness.

References directory:

1

contraption

2

casing

3

fill opening

3a

supply space

4

outlet opening

5

first pressure rollers (first embodiment)
51 rotation axis
52 direction of rotation
53 lateral surface
54 left end face
55 right end face
56 journals
57 journals
58 slots (longitudinal in pos. 53)
59 strip-shaped active elements

6

second pressure roller (first embodiment)
61 axis of rotation
62 direction of rotation
63 lateral surface
64 left end face
65 right end face
66 journals
67 journals
68 grooves (longitudinal in pos. 63)
69 strip-shaped active elements

7

driving unit
70 axis of rotation of pos. 7
71, 72, 73 wings of pos. 7

8th

baffle

9

Gap (intake nip, perforation gap, working gap and discharge gap)

10

slide

11

arrow

12

Side surface (front surface of item 59)

13

Pressure surface (at pos. 59)

14

Side surface (back surface of item 59)

15.16

Containers (containers supplied, for example, beverage cans, food cans)

17

compressed container

20

Side surface (front surface of item 69)

21

Pressure surface (at pos. 69)

22

Side surface (back surface of item 69)

30

first pressure roller of the second type (second embodiment)

31

axis of rotation

32

direction of rotation

33

lateral surface

34

Grooves (along in pos. 33)

35

strip-shaped active elements

36

pivot

37

Side surface (back surface of item 35)

38

Pressure surface (at pos. 35)

39

Side surface (front surface of item 35)

40

second pressure roller of the second type (second embodiment)

41

axis of rotation

42

direction of rotation

43

lateral surface

44

Grooves (longitudinal in pos. 43)

45

strip-shaped active elements

46

pivot

47

Side surface (back surface of item 45)

48

Pressure surface (at pos. 45)

49

Side surface (front surface of item 45)

80

bearing plate

81

outside

82

inside

83

camp

84

radially acting seal

85

axially acting seal

86

Through hole (in pos. 80)

90

left end face (from Pos. 30, 33)

91

right end face (from Pos. 30, 33)

92

left end face (from pos. 40, 43)

93

right end face (from pos. 40, 43)

H1

Height (from pos. 59 with respect to the bottom of the groove)

H2

Height (from pos. 35 with respect to the bottom of the groove)

W1

Angling between the strip-shaped active element (59, 69, 35 and 45) and the axis parallel in the lateral surface of the pressure roller

W2

Inclination angle between the front surface 12 and 20 of the strip-shaped active element 59 and 69 and the edge formed by the intersection of the front surface and the adjacent pressure surface 13 and 21 edge radius line

W3

Distance angle between the front surface 12 and 20 and the leading surface in the direction of rotation back surface 14 and 22 of the next strip-shaped active element 59 and 69, respectively

W4

Inclination angle between the front surface 39 of the strip-shaped active element 35 and the radius line which divides the strip-shaped active element 35 symmetrically

W5

Distance angle between the front surface 39 and the protruding in the direction of rotation back surface 37 of the next strip-shaped active element 59 and 69th

Claims (12)

1. A device (1) for crushing containers (15, 16), in particular beverage cans or food cans, the device comprising:

   - two compression rollers (30, 40) that are respectively rotatable about a rotation axis (31, 41) and rotate counteracting, wherein

   - enveloping surfaces (33, 43) of the compression rollers respectively include plural bar shaped elements,

   - the bar shaped elements reach longitudinally from a left face of the compression rollers (30, 40) to an opposite right face of the compression rollers (30, 40), wherein

   - the bar shaped elements of each compression roller (30, 40) are bar shaped operating elements (35, 45) which diverge respectively with an angle of attack (W1) from a reference line that extends in the enveloping surface parallel to the rotation axis (31, 41),

   characterized in that

   - the compression rollers (30, 40) are arranged with a gap (9) between each other,

   - the bar shaped operating elements (35, 45) of the pressure rollers (30, 40) have an identically oriented angle of attack (W1) but intersect in the gap (9).
2. The device according to claim 1,
   characterized in that
   the angle of attack (W1) of each bar shaped operating element (59, 69; 35, 45) is identical in size, advantageously has a value between 0.1° and 40°, in particular a value of 15°.
3. The device according to claim 1,
   characterized in that
   the bar shaped operating elements (59, 69) have a cross section with a non symmetrical trapezoid shape which is defined on an outside by a side surface (12, 20), an opposite side surface (14, 22) and a pressure surface (13, 21) that connects the upper ends/edges of both side surfaces (12, 20 or 14, 22).
4. The device according to claim 2,
   characterized in that
   the bar shaped operating elements (59, 69) have a cross section with a non symmetrical trapezoid shape which is defined by a side surface (12, 20), an opposite side surface (14, 22) and a pressure surface (13, 21) that connects the upper ends/edges of both side surfaces (12, 20 or 14, 22).
5. The device according to claim 3 or 4,
   characterized in that
   the side surface (12, 20) that is in front in the rotation direction (52, 62) is arranged at an inclination angle (W2) to the radius line which extends through an edge that is defined by an intersection point of the front surface (12, 20) and the adjacent upper pressure surface (13, 21).
6. The device according to claim 1,
   characterized in that
   bar shaped operating elements (35, 45) are provided which have a cross section with a symmetrical trapeze shape which is defined on an outside by a side surface (39), an opposite side surface (37) and a pressure surface (38) which connects the upper ends/edges of both side surfaces (39, 37).
7. The device according to claim 2,
   characterized in that
   bar shaped operating elements (35, 45) are provided which have a cross section with a symmetrical trapeze shape which is defined on an outside by a side surface (39), an opposite side surface (37) and a pressure surface (38) which connects the upper ends/edges of both side surfaces (39, 37).
8. The device according to claim 6 or 7,
   characterized in that
   the side surface (39, 49) that is in front in the rotating direction (32, 42) is arranged at an inclination angle (W4) relative to the associated radius line which symmetrically divides the cross section surface of the bar shaped operating element (35, 45) .
9. The device according to one of the claims 1 through 5,
   characterized in that
   longitudinal grooves are arranged in the enveloping surface (53, 63) of the pressure rollers (5, 6) wherein a respective bar shaped operating element (59, 69) is arranged between two grooves (58, 68).
10. The device according to claim 9,
    characterized in that
    each bar shaped operating element (59, 69) has a height between 2 mm and 6 mm with reference to a base of the groove (58, 68), advantageously a height of 4.25 mm.
11. The device according to one of the claims 1, 2, 6, 7 or 8,
    characterized in that
    longitudinal grooves (34, 44) are arranged in the enveloping surface (33, 43) of each compression roller (30, 40), wherein a bar shaped operating element (35, 45) is respectively arranged between two grooves (34, 44).
12. The device according to claim 11,
    characterized in that
    each bar shaped operating element (35, 45) has a height of 2 mm to 5 mm, advantageously a height (H2) of 3.5 mm with reference to a base of the groove (34, 44).

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