WO2020030770A1

WO2020030770A1 - Device and method for cutting and removing strapping wires

Info

Publication number: WO2020030770A1
Application number: PCT/EP2019/071384
Authority: WO
Inventors: Leopold LEODOLTER
Original assignee: Fmw Förderanlagen Gmbh
Priority date: 2018-08-09
Filing date: 2019-08-09
Publication date: 2020-02-13
Also published as: EP3608239A1

Abstract

The invention relates to a device (1) and a method for cutting and removing strapping wires (2) from a rectangular bale (3) strapped by the wires, having: - a positioning device (4) for positioning the rectangular bale (3); - a cutting device (13) for cutting the strapping wires (2) of the rectangular bale (3); and - a wire gripping and removing device (17) for gripping and removing the strapping wires (2) of the rectangular bale (3). The cross-section of the positioning device (4) has a substantially V-shaped positioning groove (6) with a first support surface (6a) for a first outer face (3a) and with a second support surface (6b) for a second outer face (3b) of the rectangular bale (3). The wire gripping and removing device (17) has a first wire gripping and removing module (17a) for gripping and removing the strapping wires (2) on a third outer face (3c) of the rectangular bale (3) and a second wire gripping and wire removing module (17b) for gripping and removing the strapping wires (2) on a fourth outer face (3d) of the rectangular bale (3).

Description

Device and method for cutting and removing

Umreifungsdrähten

The invention relates to a device for cutting and removing strapping wires from a strapped therewith

Square bales, comprising:

- A positioning device for positioning the

Square bales;

- A cutting device for cutting open the

Strapping wires of the square bale;

- A wire holding and wire pulling device for

Holding and pulling the strapping wires of the

Square bales.

The invention further relates to a method for cutting and removing strapping wires from a square bale strapped therewith.

Such a device is known from EP 2 759 483. In this prior art, binding wires are sheathed

Square bales in a horizontal position on an endless conveyor belt fed to a gripping and cutting station. The cutting and gripping station has a cutting device and a clamping device. The cutting device is aligned vertically in order to cut through horizontal binding wires on the cuboid. As a cutting device is a

Cutting bar provided, which is equipped with a plurality of fixed knife elements arranged at a distance from one another. In addition to the fixed knife elements, there are movable knives that can move towards and away from the fixed knives.

If a packaged product reaches the gripping and cutting station, the cutting bar is moved towards the square bale, so that the fixed knife elements penetrate into the square bale. If the tooth-shaped movable knives are then moved relative to the fixed knife elements, they cut through the

Binding wires. On the opposite side of the packaged goods, the clamping device is arranged in the gripping and cutting station. This is also essentially vertical. The clamping device has a clamping bar and, in turn, like the cutting bar, has fixed fixing elements, a space for the introduction of the binding wires being provided between adjacent fixing elements. These fixation elements are assigned to grippers that are relative to the

Fixing elements are movable. Is the square bale in the

Gripping and cutting station, the clamping bar can on the

Square bales are moved so that the fixing elements penetrate the square bale and first fix the square bale together with the fixed knife elements, the binding wires penetrating into the open space. When the clamp grippers move, the passage spaces are closed, so that the binding wires are clamped. The fixing elements of the clamping bar are designed so that they protrude from the clamping grippers. In this way, the

Fixing elements can penetrate the packaged goods without impairing the mobility of the clamping grippers. The sections of the binding wires that enter the intermediate spaces when the fixing elements penetrate into the square bales can thus be gripped. On the opposite side, the binding materials can be cut by the cutting device, after which the clamping device further holds the binding materials overall and moves them away from the square bale.

Accordingly, an automated removal of the binding wires from square bales is known in principle from this prior art. However, with the known device

only a single sheet of binding wires are removed, which extend parallel to each other around the square bale. If the cutting and clamping bars are arranged vertically, only horizontal binding wires can be cut. In many cases, however, there are square bales with a cross wiring, with two perpendicular to each other

Hordes of binding wires can be wrapped around the square bales. Such cross wiring is provided in particular for plastic waste to ensure the necessary cohesion

Ensure square bales.

A unpacking machine is known from US2004250670 A1. Accordingly, the object of the present invention is to alleviate or eliminate at least individual disadvantages of the prior art. The invention has in particular the goal of enabling the unwiring of square bales with strapping wires running in different planes in a particularly simple manner.

This object is achieved by a device with the features of claim 1 and a method with the features of claim 15. Preferred embodiments are contained in the dependent claims.

According to the invention, the positioning device has an

Cross section substantially V-shaped positioning groove with a first contact surface for a first outside and with a second contact surface for a second outside of the square bale, wherein the cutting device has a first cutting element for cutting the strapping wires on the first outside of the square bale and a second cutting element for cutting open the strapping wires on the second outside of the square bale, the wire holding and wire pulling device having a first wire holding and wire pulling module for holding and pulling out the strapping wires on a third outside of the square bale and a second wire holding and wire pulling module for holding and pulling out the Has strapping wires on a fourth outside of the square bale.

In the inventive method for slicing and

Removing strapping wires from a strapped with it

Square bales are at least the following steps,

preferably carried out in succession:

- Arranging the square bale in a cross-section in

Essentially V-shaped positioning channel, wherein a first outside of the square bale rests on a first contact surface of the V-shaped positioning channel and a second outside of the square bale rests on a second contact surface of the V-shaped positioning channel;

- Cutting open the strapping wires of the square bale on the first outside of the square bale and cutting open the strapping wires on the second outside of the

Cuboid bale; and

- Holding and pulling the strapping wires on one

third outside of the square bale and holding and pulling the strapping wires on a fourth outside of the square bale.

This version offers the particular advantage that the

Square bales in a single processing position, i.e. can be freed from the strapping wires without swiveling or turning. In operation, the square bale is arranged in the V-shaped positioning channel. Depending on the version, the

Positioning trough also be designed as a transport trough in which the square bale is transported, preferably in the horizontal direction. The strapping wires, i.e. the around that

Packing material of the square bale looped binding wires, are on the first and second outside of the square bale, i.e. cut open at the top of the square bale. For this purpose, the cutting device has a first and a second cutting element, which is moved toward the first or second outside of the cuboid bale in order to cut through the sections of the strapping wires which are extended there. The strapping wires are held and pulled off on the third and fourth outer sides of the square bale, i.e. at the top of the cuboid bale. Advantageously, two groups of

Strapping wires, which are preferably guided perpendicular to each other around the square bale, are cut open, held and pulled off without having to change the rotational position of the square bale. This enables a particularly simple, reliable and inexpensive removal of the strapping wires. The V-shaped design of the positioning channel can also ensure that loose material from the

unwired square bales do not fall out of the positioning channel.

For the purposes of this disclosure, all location and directional information, such as "above", "below", "horizontally",

"Vertical", "up", "down" etc., on the intended operating state of the device on a horizontal Work surface.

To unwrap the square bales in one

Processing position without turning the square bale

enable, it is favorable if the first contact surface and the second contact surface of the V-shaped positioning channel each at an angle of essentially 45 ° to the horizontal

are arranged.

In order to enable the strapping wires to be cut open from below, it is advantageous if the V-shaped positioning channel has a first recess on the first contact surface for the passage of the first cutting element and a second recess on the second contact surface for the second cutting element of the cutting device to pass through.

With regard to a structurally simple, low-maintenance

Execution, it is advantageous if the first cutting element is designed as a first cutting bar and the second cutting element as a second cutting bar, a first cutting drive for moving the first cutting bar and a second cutting drive for moving the second cutting bar between a retracted waiting position and an advanced one Cutting position is provided. To cut the strapping wires, the first and second cutting strips are preferably simultaneously pushed against the strapping wires on the underside first and second outer sides of the square bale, so that the strapping wires are stretched beyond the yield point and therefore tear off. In this embodiment, the first and second cutting strips advantageously do not have to have sharp blades. This will reduce costs. Since resharpening of the first and second cutting strips is preferably not absolutely necessary, the maintenance intervals are also increased.

In a preferred embodiment, the first are

Cutting bar and the second cutting bar from the

withdrawn waiting position to the advanced one

Cutting position (continuous) arranged overlapping. Prefers the first and second cutting bars are arranged in parallel vertical planes, in particular directly next to one another, ie back to back. The partial overlap of the first and second cutting bars ensures exact guidance of the first and second cutting bars, whereby

Collisions during feed can be reliably avoided.

The first cutting bar preferably extends essentially over the entire width of the first outside of the square bale. The second cutting bar preferably extends essentially across the entire width of the second outside of the

Cuboid bale. All strapping wires of the square bale can be cut open at the same time. In this way, the stability of the square bale is advantageously ensured during the entire cutting process.

The first and second cutting strips are preferably identical. In this embodiment, the explanations relate equally to the first and second cutting bars.

If the longitudinal axis of the first cutting bar and the longitudinal axis of the second cutting bar are each at an angle of

Are arranged substantially 45 ° to the horizontal, the first and second cutting bar can simultaneously against the

Strapping wires on the first and second outside of the

Square bales are pressed into the V-shaped channel.

To prepare for cutting and removing the um

ripening wires, it is favorable if a slide element for moving the square bale along the V-shaped

Positioning groove is provided from an initial position to a wire removal position. In this embodiment, the positioning channel is also designed as a conveyor channel. The

Slider element can be pushed onto a first end face of the square bale, which is essentially perpendicular to the transport direction along the V-shaped conveying and

Positioning channel extends. Can be used as a slide element

For example, a positioning stamp, in particular with a flat sliding surface, can be provided. The slide element is preferably connected to a slide drive, which can be a chain drive, for example.

According to a preferred embodiment variant, the first wire holding and wire withdrawal module and / or the second one

Wire retention and wire withdrawal module each have a plurality of wire deformation elements to form U-shaped

Deformations on the strapping wires. The wire deformation elements of the first or second wire retention and wire withdrawal module are preferably of identical design. In this embodiment, the explanations relate equally to the first and the second wire retention and wire withdrawal module. The (first and / or second) wire holding and wire take-off module is preferably designed to bend the strapping wires in each case at three points in such a way that U-shaped deformations are generated. These U-shaped deformations make it easier to pull off the strapping wires, since a positive connection between the wire take-off module and the U-shaped deformations can be produced on the strapping wires. This advantageously prevents the strapping wires from slipping when being pulled off the square bale. So it becomes essential

Improvement over the prior art achieved, in which the strapping wires are only clamped, i.e.

are held frictionally. It is also advantageous that the deformation forces for the formation of the U-shaped

Deformations can be comparatively small.

In order to achieve the deformation of the strapping wires, wire deformation elements which are movable relative to one another are provided. In a first embodiment, movable wire deformation elements are provided, which are fixed

Wire deformation elements in such usammenwirken _Z that

Strapping wires between the movable and fixed wire deformation elements can be bent into a U-shape. In a second embodiment variant are in opposite

Moving towards and away from each other

Wire forming elements are provided around the U-shaped

Provide deformations on the strapping wires. In order to deform the individual strapping wires in the desired manner, in a preferred embodiment a set of movable wire deformation elements is arranged between a first arrangement of fixed wire deformation elements and a second arrangement of fixed wire deformation elements, the set of movable wire deformation elements to form the U-shaped ones Deformations on the strapping wires is movable relative to the first and second arrangement of fixed wire deformation elements. To the

Bending the strapping wires are the movable wire deformation elements between a receiving position moved away from the fixed wire deformation elements, in which the strapping wires can be received between the movable and the fixed wire deformation elements, and a bending position to be moved onto the fixed wire deformation elements, in which the strapping wires between the movable and the fixed wire deformation elements are bent in a U-shape, can be transferred.

For moving the movable wire deformation elements

A transverse drive is preferably provided between a first position (receiving position) for receiving the strapping wires and a second position (bending position) for forming the U-shaped deformations on the strapping wires. The cross drive is preferably set up to move the movable wire deformation elements in a direction parallel to the facing outside of the square bale, in particular substantially perpendicular to the wire deformation elements on the facing outside of the square bale. A particularly linear hydraulic drive is preferred as the transverse drive

provided, which the movable wire deformation elements together from the first (receiving) position to the second

(Bending) position and vice versa.

In order on the one hand to enable the strapping wires to be held securely and on the other hand to form a U-shape

To effect strapping wires in a simple manner, it is favorable if the set of movable wire deformation elements by hooks on a base plate and / or the first arrangement of stationary wire deformation elements is formed by first projections on a first base plate and / or the second arrangement of stationary wire deformation elements is formed by second projections on a second base plate.

According to a preferred embodiment, a first

Feed drive for displacing the first wire holding and wire take-off module essentially perpendicular to the third

The outside of the square bale and a second feed drive for moving the second wire holding and wire take-off module are provided substantially perpendicular to the fourth outside of the square bale. In particular, hydraulic linear drives can be provided as the first and second feed drives.

In order to remove the cut and held strapping wires, a winding device with a first winding fork for winding up the strapping wires on the third outside of the square bale in a retracted position of the first feed drive and a second winding fork for winding up the strapping wires on the fourth outside of the square bale is preferably in one retracted position of the second feed drive is provided. The first and / or second winding fork each has two winding legs, one of the winding legs between two angled against each other

Sections of the strapping wires can be inserted so that the strapping wires are wound on the first or second winding fork by rotating the first or second winding fork. A winding drive, in particular an electrical rotary drive, is preferably provided for rotating the first or second winding fork.

In order to prepare the further transport of the wound strapping wires, the winding device preferably has a first pivot unit for pivoting the first winding fork from a winding position into a discharge position and a second pivot unit for pivoting the second winding fork from one

Winding position in a release position. The axis of rotation of the first or second winding fork preferably extends essentially in the winding and in the ejection position parallel to the facing outside of the square bale, the axis of rotation of the first or second wrapping fork in the ejection position being further away from the facing outside of the square bale than in the wrapping position.

In order to be able to fix the square bale when cutting open the strapping wires, there is a first pressing element for pressing against the third outside of the square bale and a second one

Pressing element for pressing on the fourth outside of the

Square bale provided when cutting the strapping wires on the first and second outside of the square bale.

To fix the square bale in the cutting position, a first linear drive for moving the first pressing element between a position spaced from the square bale and a position pressed against the third outside of the square bale and a second linear drive for moving the second pressing element between a position spaced from the square bale and one are preferred Position pressed against the fourth outside of the square bale. In the

The square bale is fixed in the clamping position on the upper side by the first and the second pressing element and on the underside by the first and the second contact surface of the V-shaped conveyor trough.

According to a preferred embodiment is a first

See slide unit with a first upper slide and a first lower slide and a second slide unit with a second upper slide and a second lower slide, the first wire holding and wire take-off module on one of the first upper slide and first lower slide and the first pressing element on the other of the first upper slide and first Lower carriage is arranged, the second wire holding and wire withdrawal module on one of the second upper carriage and second lower carriage and the second

Pressure element is arranged on the other of the second upper slide and second lower slide.

The invention is further explained below using an exemplary embodiment shown in the figures. 1A shows a view of a device according to the invention for cutting and removing strapping wires on a square bale, in particular from plastic films.

1B shows a perspective view of a square bale with cross-wiring.

FIG. 2 shows a view of a positioning and conveying trough of the device according to FIG. 1.

FIG. 3 shows a view of the positioning and conveying trough in connection with a cutting device of the device according to FIG. 1.

4 and 5 each show a first slide unit of the device according to FIG. 1, a first wire holding and wire withdrawal module being arranged on a first upper slide and a first pressing element on a first lower slide.

6 to 11 show different views of the first

Wire retention and withdrawal module.

FIG. 12 shows a side view of the first carriage unit according to FIGS. 4 and 5.

Fig. 13 shows the first carriage unit when pulling the

Strapping wires.

14 shows a winding device of the device according to FIG.

1.

Fig. 1A shows in cross section a device 1 for cutting and removing binding wires or strapping wires 2, with which a square bale 3 made of particulate material is held together. The device 1 enables the first 2a and second strapping wires 2b to be removed from the square bale 3 without having to turn the square bale 3. As can be seen from FIG. 1B, the square bale 3 has a first 3a, second 3b, third 3c and fourth outer side 3d as well as a first end side 3e and a second end side 3f. In the embodiment shown, the outer 3a, 3b, 3c, 3d and

End faces 3e, 3f of the square bale 3 provided with a so-called cross wiring. Accordingly, a plurality of first strapping wires 2a extend parallel and at a distance from one another from the first outer side 3a over the first end side 3e, the fourth outer side 3d and the second end side 3f to the first outer side 3a. A plurality of second strapping wires 2b extend parallel and at a distance from one another from the second outer side 3b via the first end side 3e, the third outer side 3c and the second end side 3f to the second outer side 3b. Thus, the first strapping wires 2a and the second strapping wires 2b only cross on the first end face 3e and on the second end face 3f. Only the first strapping wires 2a are on the first 3a and fourth outer sides 3d, and on the second 3b and third

Only the second strapping wires 2b are provided on the outside 3c. Thus on each outside 3a to 3d

only the first arranged parallel to each other

Strapping wires 2a or second strapping wires 2b are provided.

As can be seen in particular from FIG. 2, the device 1 initially has a positioning and conveying device 4 for conveying the square bales 3 in the direction perpendicular to the first 3e or

second end face 3f of the square bale and positioning the square bale 3 in a position for cutting and removing the strapping wires 2 (cf. arrow 5 in FIG. 2). The

Transport device 4 has a positioning and conveying trough 6 which guides the cross bale 3 via a conventional bale feed 7 (cf. FIG. 1), for example a conveyor belt,

is fed. The square bale 3 is along the positioning and conveying trough 6 in the transport direction 5 between one

Starting position adjacent to the bale feed 7 and one

Wiring position for cutting open and removing the

Strapping wires 2 promoted. In the embodiment shown, the positioning and conveying trough 6 is essentially V-shaped with a cross section (seen perpendicular to the direction of transport 5) first bearing surface 6a for the first outer side 3a and with a second bearing surface 6b for the second outer side 3b of the square bale 3. The first contact surface 6a and the second contact surface 6b of the V-shaped positioning and

Conveyor trough 6 are each arranged at an angle of essentially 45 ° to the horizontal, i.e. the first 6a and second contact surface 6b are arranged at an angle of essentially 90 ° to one another. To move the square bale 3 along the V-shaped Postionier- and conveyor trough 6 from the initial position to the unwiring position, a slide element 8 is provided, which is guided against the first end face 3e of the square bale 3. A positioning punch 8a is provided as slide element 8, which is provided with a

Slider drive 9, here a chain drive, is connected.

By the conveyor and positioning device 4, the

Square bale 3a conveyed along the conveying and positioning channel 6 and positioned in the unwiring position shown in FIG. 1, after which the strapping wires 2

cut and remove from the square bale 3.

The device 1 has a fixing unit 10 for fixing the square bale 3 in the unwiring position. The fixing unit 10 has a first pressing element 11a for pressing against the third outside 3c of the square bale 3 (cf. in detail FIGS. 4, 5) and a second pressing element 11b for pressing against the fourth outside 3d of the square bale 3. To the

Moving the first pressing element 11a between a position spaced apart from the third outer side 3c of the square bale 3 and against the third outer side 3c of the

Squared bale 3 pressed position is a first linear drive for moving the second pressing element 11b between a position spaced apart from the fourth outside 3d of the square bale 3 and a position pressed against the fourth outside 3d of the square bale 3, a second linear drive is provided. By activating the first and second linear drives, the square bale 3 is pressed from above by the first pressing element 11a and by the second pressing element 11b against the first 6a and second contact surface 6b of the positioning channel 6 fixed. In the embodiment shown, the first 11a and second pressing element 11b each have a pressing bar with a flat, parallel to the facing outside 3c or 3d of the

Cuboid bale 3 extended contact surface.

As can be seen in particular from FIG. 3, the device 1 also has a cutting device 13 which is activated in the positioned and fixed state of the square bale 3. The cutting device 13 has a first cutting element 13a for cutting open the strapping wires 2 on the first outer side 3a of the square bale 3 and a second cutting element 13b for

Cutting open the strapping wires 2 on the second outer side 3b of the square bale 3. In the embodiment shown, the V-shaped positioning and conveying trough 6 has a first recess 14a on the first support surface 6a for the passage of the first cutting element 13a and a second recess 14b on the second support surface 6b for the passage of the second cutting element 13b of the cutting device 13 , The first cutting element 13a is designed as a first cutting bar, the second cutting element 13b as a second cutting bar. The first cutting bar is connected to a first cutting drive 15a, the second cutting bar to a second cutting drive 15b. In the embodiment shown, the first 15a and second cutting drive 15b each have at least one linear drive, here two hydraulic drives each. Furthermore, a first steering lever 16a is provided for the first cutting bar and a second steering lever 16b for the second cutting bar. By activating the first 15a and second cutting drives 15b, the first and second cutting strips are moved together from a retracted waiting position (shown in solid lines in FIG. 3) below the first 6a and second contact surface 6b into a through the first recess 14a and the second recess 14b of the

Positioning and conveyor trough 6 passing cutting position (shown in Fig. 3 with dashed lines) advanced. The first cutting bar is against the strapping wires on the first outside 3a, the second cutting bar against the

Strapping wires pressed on the second outside 3b. Since the cross bale 3 does not go up because of the fixing unit 10

can avoid, the strapping wires 2 through the first and the second cutting bar is stretched until the strapping wires 2 tear. After activation of the cutting device 13, the strapping wires 2 are in the cut state, but are still arranged adjacent to the square bale 3. In the embodiment shown, the first and second are

Cutting bar back to back, i.e. arranged parallel and adjacent to each other. The first and second cutting bars are from the withdrawn waiting position to

advanced cutting position arranged to overlap to avoid a collision between the first and second cutting bar. The longitudinal axes of the first and second cutting bars are each at an angle of essentially 45 ° to

Horizontal arranged so that the first cutting bar

perpendicular to the strapping wires 2 on the first outside 3a and the second cutting bar perpendicular to the strapping wires 2 on the second outside 3b.

The device 1 also has a wire retention and

Wire puller 17 for holding and pulling the

Strapping wires 2 of the square bale 3, with a first (seen in detail from FIGS. 4, 5 and 12, 13)

Wire holding and wire take-off module 17a for holding and pulling out the strapping wires 2 on the third outer side 3c of the square bale 3 and a second wire holding and

Wire withdrawal module 17b for holding and pulling out the

Strapping wires 2 on the fourth outside 3d of the

Cuboid bales 3 are provided.

As can be seen in particular from FIGS. 5 to 11, the first 17a and the second wire holding and wire withdrawal module 17b each have a plurality of wire deformation elements 18

Formation of U-shaped deformations (see FIG. 9) on the strapping wires 2. In the embodiment shown, a set of movable wire deformation elements 18a is arranged between a first arrangement of fixed wire deformation elements 18b and a second arrangement of fixed wire deformation elements 18c. The set of movable wire deformation elements 18a can be applied to the first 18b and second arrangement of fixed wire deformation elements 18c be moved to and away from it. For this purpose, a transverse drive 19, in particular another hydraulic linear drive, is provided with which the movable wire deformation elements 18a between a first position for receiving the strapping wires 2 in spaces 18d between the movable and fixed wire deformation elements and a second position for the formation of the U-shaped

Deformations on the strapping wires 2 can be moved.

The set of movable wire deformation elements 18a is formed by hooks 20 which protrude from a base plate 21 in the direction of the square bale 3. The hooks 20 are preferably arranged at regular intervals along the base plate 21.

The first arrangement of fixed wire deformation elements 18b is formed by first projections 22a, which protrude from a first base plate 23a in the direction of the square bale. The second arrangement of fixed wire deformation elements 18c is identical to the first arrangement of fixed

Wire deformation elements formed by second projections 22b, which protrude from a second base plate 23b in the direction of the square bale 3. The first projections 22a are preferably provided on the first base plate 23a at regular intervals, and the second projections 22b are provided on the second base plate 23b at regular intervals. In a preferred embodiment, the hooks 20, first 22a and second projections 22b project essentially equally far in the direction of the square bale 3.

The device 1 also has a first feed drive 24a, in particular a hydraulic drive, with which the first wire holding and wire withdrawal module 17a essentially

perpendicular to the third outside 3c of the square bale 3

can be moved. In addition, a second feed drive 24b, in particular an additional hydraulic drive, is provided, with which the second wire holding and wire withdrawal module 17b is essentially perpendicular to the fourth outer side 3d of the

Square bale 3 can be moved. When the first 17a or second wire holding and wire take-off module 17b is moved towards the square bale 3, the strapping wires 2

recorded and then by activating the transverse drive 19 provided the U-shaped deformations 2c. After the formation of the U-shaped deformations 2c on the strapping wires 2, the first 17a and second wire holding and pulling-off module 17b can be moved away from the square bale 3, so as to pull the strapping wires 2 from the square bale 3.

In the embodiment shown, the fixing unit 10 and the wire holding and pulling-off device 17 are formed by a (first in detail in FIGS. 4, 5) carriage unit 25 and a second carriage unit, the first

Carriage unit 25 is assigned to the third outside 3c and the second carriage unit to the fourth outside 3d of the square bale 3. The first carriage unit 25 has a first upper carriage 25a and a first lower carriage 25b. The second slide unit has a second upper slide and a second lower slide. The first wire holding and wire withdrawal module 17a is on the first upper slide 25a and the first pressing element 11a on the first lower slide 25b

arranged. The second wire holding and wire withdrawal module 17b is arranged on the second upper slide and the second pressing element 11b on the second lower slide. In addition, a first wire deflecting element 27a (cf. FIG. 13) and a second wire deflecting element 27b are provided, with which the strapping wires 2 are deflected when the square bale 3 is pulled off by means of the wire holding and pulling-off modules 17a, 17b.

As can be seen from FIGS. 13 and 14, the device 1 also has a winding device 28 for winding the

cut open and pulled off the square bale 3

Strapping wires 2 on. The winding device 28 has a first winding fork 29 for winding the strapping wires on the third outside 3c of the square bale 3 in one

retracted position of the first feed drive 24a. Furthermore, the winding device 28 has a second winding fork 30 for winding the strapping wires 2 on the fourth outer side 3d of the square bale 3 in a retracted position of the second feed drive 24b. The first 29 and second

Winding fork 30 each have two legs 31, one of the legs 31 between two sections 32 of the stripped from the square bale 3 and deflected by the wire deflecting elements 27a, 27b strapping wires 2. By turning the first 29 and second winding fork 30, the

Strapping wires 2 wound. The winding device 28 has a first swivel unit 33a (cf. FIG. 14) for swiveling the first winding fork 29 from a winding position (shown in solid lines in FIG. 14) to a ejecting position (shown in dashed lines in FIG. 14).

Correspondingly, the winding device 28 has a second one

Swivel unit for swiveling the second winding fork 30 from a winding position into a discharge position.

The removal of the strapping wires 2 from the square bale 3 in the embodiment shown comprises at least the following

Steps :

First, the square bale 3 is fed into the conveying and positioning channel 6 via the bale feed 7. By activating the slide drive 8, the square bale 3 in

Transport direction 5 pushed into the unwiring position.

Then the first 11a and second pressing element 11b are pressed against the square bale 3, so that the square bale is clamped. The strapping wires 2 are then cut open using the first 13a and second cutting element 13b.

For this purpose, the first 15a and second cutting drive 15 are activated so that the first 13a and second cutting element 13b pass through the first 14a and second recess 14b and thus the strapping wires 2 on the first 3a and second

Cut through outside 3b of square bale 3. The strapping wires 2 are then detected on the respectively opposite third 3c and fourth outer side 3d with the aid of the first 17a and second wire holding and wire withdrawal module 17b. Here, U-shaped deformations are generated on the strapping wires 2, on which the strapping wires 2 are held.

The strapping wires are then pulled away from the square bale 3 and finally wound up.

Claims

Claims:

1. Device (1) for cutting and removing

Strapping wires (2) from a square bale (3) strapped with them, comprising:

- A positioning device (4) for positioning the

Square bale (3);

- A cutting device (13) for cutting open the

Strapping wires (2) of the square bale (3);

- A wire holding and wire pulling device (17) for holding and pulling the strapping wires (2) of the

Square bale (3);

characterized in that

- The positioning device (4) in cross section in

Essentially V-shaped positioning channel (6) with a first contact surface (6a) for a first outside (3a) and with a second contact surface (6b) for a second outside (3b) of the square bale (3), wherein

- The cutting device (13) a first cutting element (13a) for cutting open the strapping wires (2) on the first outside (3a) of the square bale (3) and a second

Cutting element (13b) for cutting open the strapping wires (2) on the second outside (3b) of the square bale (3), wherein

- The wire holding and wire pulling device (17)

first wire retention and withdrawal module (17a) for

Holding and pulling the strapping wires (2) on a third outer side (3c) of the square bale (3) and a second wire holding and wire pulling module (17b) for holding and pulling out the strapping wires (2) on a fourth outer side (3d) of the square bale (3 ) having.

2. Device according to claim 1, characterized in that the V-shaped positioning channel (6) on the first bearing surface (6a) has a first recess (14a) for the passage of the first

Cutting elements (13a) and on the second support surface (6b) a second recess (14b) for the passage of the second

Has cutting elements (13b) of the cutting device (13).

3. Device according to claim 1 or 2, characterized in that the first cutting element (13a) as the first cutting bar and the second cutting element (13b) as the second cutting bar

are executed, wherein a first cutting drive (15a) for

Moving the first cutting bar and a second cutting drive (15b) for moving the second cutting bar is in each case provided between a retracted waiting position and an advanced cutting position.

4. The device according to claim 3, characterized in that the first cutting bar and the second cutting bar of the

withdrawn waiting position to the advanced one

Cutting position are arranged overlapping.

5. The device according to claim 3 or 4, characterized in that the longitudinal axis of the first cutting bar and the longitudinal axis of the second cutting bar each at an angle of

Are arranged essentially 45 ° to the horizontal.

6. Device according to one of claims 1 to 5, characterized

characterized in that a slide element (8) for moving the square bale (3) along the V-shaped positioning channel (6) from an initial position to a wire removal position

is provided.

7. Device according to one of claims 1 to 6, characterized

characterized that the first wire retention and

Wire withdrawal module (17a) and / or the second wire holding and wire withdrawal module (17b) a plurality of

Has wire deformation elements (18) for forming U-shaped deformations (2c) on the strapping wires (2).

8. The device according to claim 7, characterized in that a set of movable wire deformation elements (18a) between a first arrangement of fixed

Wire deformation elements (18b) and a second arrangement of fixed wire deformation elements (18c) is arranged, the set of movable wire deformation elements (18a) for forming the U-shaped deformations (2c) on the Strapping wires (2) relative to the first (18b) and second

Arrangement of fixed wire deformation elements (18c) is movable.

9. The device according to claim 8, characterized in that a transverse drive (19) for moving the movable

Wire deformation elements (18a) between a first position for receiving the strapping wires (2) and a second position for forming the U-shaped deformations (2c) on the

Strapping wires (2) is provided.

10. The device according to claim 8 or 9, characterized in that the set of movable wire deformation elements (18a) by hooks (20) on a base plate (21) and / or that the first arrangement of fixed wire deformation elements (18b) by first projections (22a ) on a first base plate (23a) and / or that the second arrangement of fixed

Wire deformation elements (18c) is formed by second projections (22b) on a second base plate (23b).

11. The device according to one of claims 1 to 10, characterized in that a first feed drive (24a) for

Shifting the first wire retention and withdrawal module (17a) substantially perpendicular to the third outside (3c) of the square bale (3) and a second feed drive (24b) for shifting the second retention and withdrawal module (17b) substantially perpendicular to the fourth outside (3d ) the square bale (3) are provided.

12. Device according to one of claims 1 to 11, characterized in that a first pressing element (11a) for

Press on the third outside (3c) of the square bale (3) and a second pressing element (11b) for pressing on the fourth outside (3d) of the square bale (3) when cutting open the strapping wires (2) on the first (3a) and second outside (3b) of the square bale (3) are provided.

13. The apparatus according to claim 12, characterized in that a first linear drive for moving the first Pressure element (11a) between a position spaced from the square bale (3) and a position pressed against the third outside (3c) of the square bale (3) and a second linear drive for displacing the second pressure element (11b) between a position spaced from the square bale (3) and a position pressed against the fourth outside (3d) of the square bale (3) is provided.

14. The apparatus of claim 12 or 13, characterized

characterized in that a first slide unit (25) with a first upper slide (25a) and a first lower slide (25b) and a second slide unit with a second upper slide and a second lower slide are provided, the first wire holding and wire take-off module (17a) on one of the first upper slide (25a) and first lower slide (25b) and the first pressing element (11a) on the other of the first

Upper slide (25a) and first lower slide (25b) are arranged, the second wire holding and wire withdrawal module (17b) on one of the second upper slide and the second

Lower carriage and the second pressing element (11b) are arranged on the other of the second upper carriage and the second lower carriage.

15. Method of cutting and removing

Strapping wires (2) from a square bale (3) strapped with them, comprising:

- Arranging the square bale (3) in a cross-sectionally substantially V-shaped positioning channel (6), wherein a first outer side (3a) of the square bale (3) on a first contact surface (6a) of the V-shaped positioning channel (6) and one second outside (3b) of the square bale (3) on a second contact surface (6b) of the V-shaped

Positioning channel (6) rests;

- Cutting the strapping wires (2) of the square bale (3) on the first outside (3a) of the square bale (3) and cutting the strapping wires (2) on the second

Outside (3b) of the square bale (3); and

- Holding and pulling the strapping wires (2) on a third outside (3c) of the square bale (3) and Holding and pulling the strapping wires (2) on a fourth outside (3d) of the square bale.