Attachment for an agricultural harvesting vehicle

Abstract

Agricultural header (10), in particular a corn header, with a central header section (11), and with lateral header sections (12a, 12b, 13a, 13b, 14a, 14b) adjoining both sides of the central header section (11), wherein the lateral header sections (12a, 12b, 13a, 13b, 14a, 14b) are displaceable relative to the central header section (11) when the header (10) is moved between a working position of the header (10) and a transport position thereof, and wherein the header sections (11, 12a, 12b, 13a, 13b, 14a, 14b) carry at least mowing elements (19) and preferably additionally conveying elements (20), and with at least one, a lateral The guide element (30) for the crop is assigned to the header section (12a, 12b, 13a, 13b, 14a, 14b), which, viewed in the direction of harvesting, is located behind the mowing unit (19) and, if applicable, the conveying unit (20) of the respective lateral header section (12a, 12b,13a, 13b, 14a, 14b) is arranged and serves to guide separated crop material transversely to the direction of travel or harvesting direction towards the central header section (11), characterized in that the or each guide element (30) is designed as a guide bracket (30) which, when the header (10) is moved from the transport position of the header (10) into the working position of the header (10), can be automatically moved from a rest position of the guide bracket (30) into a functional position via a mechanical coupling element (31) against the spring force of a spring element.

Description

[0001] The invention relates to an attachment of an agricultural harvesting vehicle according to the preamble of claim 1.

[0002] Headers for agricultural harvesting vehicles are known from the prior art. These headers comprise a central, stationary header section and, on either side of the central header section, adjacent and movable lateral header sections. When the header is a maize header for a forage harvester, the central header section is also referred to as the central trough, and the movable header sections adjacent to it are also referred to as the boom.

[0003] EP 0 992 187 A1 discloses a machine for sewing maize and stalk-like crops, comprising a series of intake and mowing drums rotating about substantially vertical axes, which are supported in a transverse orientation on both sides of a central vertical plane of the machine on a base frame comprising a fixed central part and two side parts hinged to the edges thereof, which side parts can be pivoted from a working position formed with the central part into a folded-up transport position, and pre-pressure bars are provided which press the crop forwards during mowing and can be pivoted backwards from the working position into a rest position via folding joints.

[0004] From DE 10 2005 036 183 A1, a machine for harvesting stem-like plants is known, comprising a frame extending transversely to a forward direction and comprising a central part and two outer side parts, the side parts of which are movable by an externally powered actuator relative to the central part between an operating position, in which they are arranged laterally next to the central part, and a transport position, in which they are arranged above the central part, wherein the central part and the side parts carry intake devices arranged laterally next to one another for receiving and conveying stem-like plants standing in a field, and a pre-press bar is attached to at least one of the side parts, which, in an operating position, extends forward above an outer side wall of the side part in the forward direction and, when the side part is moved into the transport position, can be automatically moved relative to the side part into a transport position.wherein there is a mechanical drive connection between the central part and the pre-pressure bracket, which forcibly moves the pre-pressure bracket from the operating position to its transport position when the side part is moved by the actuator.

[0005] DE 10 2006 027 343 A1 discloses a machine for harvesting stem-like plants with a frame, at least one intake and mowing device supported on the frame with a cutting element for cutting plants standing in a field and a drivable conveyor element arranged above it with recesses for receiving plant stems, an outer divider tip fastened to the frame and arranged laterally next to the intake and mowing device with respect to a forward direction of the machine, which can be fixed in different lateral positions relative to the frame for the purpose of adaptation to different row spacings of the crop and a lateral pre-press bar arranged above the outer divider tip and extending at least approximately forward in the forward direction for guiding the plants,The intake and mowing device is rigidly attached to the frame and the lateral pre-pressure bracket is connected to the divider tip and is adjustable laterally together with it.

[0006] EP 1 464 214 B1 discloses a harvesting vehicle with a front attachment comprising a central attachment section and, on either side thereof, two lateral attachment sections, namely an inner lateral attachment section adjacent to the central attachment section and an outer lateral attachment section adjacent to the respective inner lateral attachment section. The inner lateral attachment sections are each displaceable relative to the central attachment section about a pivot axis, wherein the outer lateral attachment sections, which are adjacent to the inner lateral attachment sections opposite the central attachment section, are also displaceable relative to the respective inner lateral attachment section about pivot axes.The attachment sections can be displaced relative to one another between a working position of the attachment and a transport position of the attachment in such a way that the inner lateral attachment sections adjacent to the fixed, central attachment section and the outer lateral attachment sections adjacent to the inner lateral attachment sections extend at an obtuse angle or in a roof-like manner to one another in the transport position.

[0007] From the brochure “The 300 plus-Series, Maschinenfabrik Kemper GmbH & Co. KG" is a front attachment of an agricultural harvesting vehicle designed as a maize header, which comprises front attachment sections that can be moved relative to one another to transfer the front attachment between a working position and a transport position. Furthermore, it is known from this brochure that the front attachment has a hose-like guide element for crop material on both sides of the middle front attachment section, which extends at least along a lateral front attachment section when viewed transversely to the direction of travel or harvesting direction, which serves to guide cut-off crop material transversely to the direction of travel or harvesting direction in the direction of the middle front attachment section, and which is elastically deformable when the front attachment is moved between the working position and the transport position.Such guide elements for the crop, which are made of an elastic material, are subject to downward deflection in the working position, particularly when large working widths are to be achieved for a front attachment, so that they cannot be positioned exactly and therefore cannot optimally guide the cut crop transversely to the direction of travel or harvesting direction in the direction of the central front attachment section.

[0008] Based on this, the present invention is based on the object of creating a novel attachment for an agricultural harvesting vehicle.

[0009] This object is achieved by an attachment according to claim 1.

[0010] According to the invention, the or each guide element according to claim 1 is designed as a guide bracket which, when the attachment is moved from the transport position of the attachment and into the working position of the attachment, can be automatically moved against the spring force of a spring element from a rest position of the guide bracket into a functional position of the same via a mechanical coupling element.

[0011] Preferably, the spring element automatically pushes the respective guide bracket into the rest position of the attachment when the attachment is moved from the working position of the attachment into the transport position of the attachment.

[0012] The respective guide bar is inherently stable and does not require elastic deformation when moving the attachment between the working and transport positions. With such guide bars, the cut crop can be moved more precisely across the direction of travel or harvesting than is possible with the elastically deformable guide elements known from the prior art.

[0013] When the attachment is moved from the transport position to the working position, the respective guide bar is automatically moved from the rest position to the functional position via a mechanical positive coupling provided by the mechanical coupling element and acting against the spring force of the spring element. When the attachment is moved in the opposite direction from the working position to the transport position, the spring element pushes the respective guide bar into the rest position. A space-saving arrangement of the attachment sections in the transport position of the attachment is possible without the need for hydraulic, pneumatic, or electric actuators to move the respective guide bar between the rest position and the functional position.

[0014] According to an advantageous development of the invention, the mechanical coupling element is attached to a front attachment section adjacent to the lateral attachment section supporting the respective guide bar. This enables a particularly advantageous, positively coupled displacement of the respective guide bar.

[0015] According to a further embodiment of the invention, a guide element engages the respective lateral attachment section in such an articulated manner that the respective guide element, when it assumes its functional position in the working position of the attachment, moves out of the functional position against the spring force of the spring element in order to protect it from

[0016] Damage caused by foreign objects coming into contact with the guide element can be automatically shifted into a protective position. This can reduce the risk of damage to the respective guide element in its functional position.

[0017] A guide element according to the invention is preferably U-shaped and has two lateral legs that are connected at first ends via a central leg and that engage the respective attachment section at second ends. The U-shaped guide element can be designed as a bracket bent from a tube. Alternatively, the first ends of the two lateral legs can be connected to each other by a hose and / or a cable.

[0018] Preferred developments of the invention will become apparent from the dependent claims and the following description. Exemplary embodiments of the invention are explained in more detail, without being limited thereto, with reference to the drawings. Herein: Fig. 1 an exemplary front attachment of an agricultural harvesting vehicle in a fully unfolded state, referred to as the working position; Fig. 2 one opposite Fig. 1 enlarged half of the attachment; Fig. 3 shows a section of an attachment according to the invention in its working position with a guide bracket in its functional position; Fig. 4 the section of the Fig. 2 with two additional protective positions of the guide bar; Fig. 5 the section of the Fig. 4 in side view. Fig. 6 the section of the Fig. 2 in a first intermediate position between the working position and the transport position of the attachment; Fig. 7 the section of the Fig. 2 in a second intermediate position between the working position and the transport position of the attachment; and Fig. 8 the section of the Fig. 2 in transport position of the attachment and with the guide bar in the rest position.

[0019] A front attachment has several sections: a fixed, central section and movable side sections on either side of it. Typically, the fixed section is referred to as the center trough, while the movable sections arranged on either side of the fixed section are also referred to as booms.

[0020] Fig. 1 and Fig. 2 show details of an exemplary attachment 10 for an agricultural harvesting vehicle, wherein in Fig. 1 and Fig. 2 a central, fixed attachment section 11, first lateral inner attachment sections 12a, 12b adjacent to this central attachment section 11 and displaceable relative to the central attachment section 11, second lateral inner attachment sections 13a, 13b adjacent to these first lateral inner attachment sections 12a, 12b opposite the central attachment section 11 and lateral outer attachment sections 14a, 14b adjacent to the second lateral inner attachment sections 13a, 13b opposite the respective first lateral inner attachment section 12a, 12b.

[0021] In the illustrated embodiment, in which the front attachment 10 is designed as a corn header, each front attachment section 11, 12a, 12b, 13a, 13b, 14a, 14b has a support element 18, which supports at least one rotating or revolvingly driven mowing element 19 and / or one conveyor element 20. The mowing elements 19 are also referred to as mowing and intake elements, and the conveyor elements 20 are also referred to as cross-conveying elements.

[0022] The Fig. The first lateral inner attachment sections 12a, 12b of the attachment 10 shown in Figures 1 to 2 are each displaceable relative to the central attachment section 11 about a pivot axis 15a, 15b. The second lateral inner attachment sections 13a, 13b of the attachment 10 are displaceable relative to the respective first lateral inner attachment section 12a, 12b about a pivot axis 16a, 16b. The lateral outer attachment sections 14a, 14b of the attachment 10 are displaceable relative to the respective second lateral inner attachment section 13a, 13b about a pivot axis 17a, 17b.

[0023] The lateral attachment sections 12a, 13a and 14a positioned to a first side of the central attachment section 11 of the attachment 10 and the lateral attachment sections 12b, 13b and 14b positioned to an opposite second side of the central attachment section 11 have, with respect to the central attachment section 11, symmetrical support elements 18 for the mowing elements 19 and / or the conveying elements 20.

[0024] In the working position, all support elements 18 of all attachment sections 11, 12a, 13a, 14a, 12b, 13b, 14b are arranged side by side in one position. To transfer the attachment 10 between the working position and the transport position, the first lateral inner attachment sections 12a, 12b can each pivot approximately 180° relative to the central attachment section 11 about the pivot axes 15a, 15b. The second lateral inner attachment sections 13a, 13b can also each pivot approximately 180° relative to the respective first lateral inner attachment section 12a, 12b about the respective pivot axes 16a, 16b. The lateral outer attachment sections 14a, 14b can each be pivoted by 150° to 170° relative to the respective second lateral inner attachment section 13a, 13b.

[0025] How Fig. 1 and Fig. 2, the support element 18 of the middle attachment section 11 accommodates four mowing elements 19 and four conveying elements 20. The support elements 18 of the attachment sections 12a and 12b each accommodate two mowing elements 19 and one conveying element 20. The support elements 18 of the attachment sections 13a, 13b each accommodate two mowing elements 19 and two conveying elements 20. The support elements 18 of the attachment sections 14a and 14b each accommodate one mowing element 19. To move the front attachment 10 from the unfolded working position into the folded transport position, the lateral front attachment sections 12a, 13a, 14a positioned to the first side of the front attachment section 11 are preferably moved synchronously or simultaneously with the second, third and fourth front attachment sections 12b, 13b, 14b positioned to the second side of the central front attachment section 11.

[0026] How Fig. 1 and Fig. 2, the first lateral inner attachment sections 12a, 12b are displaceable relative to the middle attachment section 11 about the pivot axes 15a, 15b by means of a respective displacement device 21. The lateral outer attachment sections 14a, 14b are displaceable relative to the second lateral inner attachment sections 13a, 13b about the pivot axes 17a, 17b by means of a respective further displacement device 22 (see Fig. 1a, Fig. 1b) can be displaced. The respective displacement device 21, 22 each comprises at least one hydraulic cylinder.

[0027] The respective second lateral inner attachment section 13a, 13b of the attachment 10 is coupled to the middle attachment section 11 via a tensile force transmitting element 23 to ensure the displaceability of the same relative to the respective first lateral inner attachment section 12a, 12b of the attachment 10, namely in such a way that when the respective first lateral inner attachment section 12a, 12b is displaced relative to the middle attachment section 11 by the respective displacement device 21, the respective second lateral inner attachment section 13a, 13b is forcibly coupled to the displacement of the respective first lateral inner attachment section 12a, 12b about the pivot axis 15a, 15b.The displacement of the respective first lateral inner attachment section 12a, 12b of the attachment 10 and the respective second lateral inner attachment section 13a, 13b of the attachment 10 is therefore carried out via the respective displacement device 21, which serves to displace the respective first lateral inner attachment section 12a, 12b relative to the central attachment section 11, and via the forced coupling of the respective second lateral inner attachment section 13a, 13b to the central attachment section 11 via the respective tensile force-transmitting element 23. The respective tensile force-transmitting element 23 is preferably designed as a cable or alternatively as a chain.

[0028] The respective traction force transmitting element 23 engages with a first end on the central attachment section 11 and with an opposite second end on the respective second lateral inner attachment section 13a, 13b.

[0029] The respective second lateral inner attachment section 13a, 13b comprises a deflection element 24 for the respective traction force transmitting element 23.

[0030] The respective deflection element 24 of the attachment 10 is an assembly of the respective second lateral inner attachment section 13a, 13b. The respective traction-transmitting element 23 engages with its second end on the respective deflection element 24 and is, in particular, cast therein.

[0031] On the respective transmission element 24, a section of the traction force transmitting element 23 adjacent to the second end of the respective traction force transmitting element 23 is guided during the displacement of the respective second lateral inner attachment section 13a, 13b relative to the respective first lateral inner attachment section 12a, 12b in such a way that during the displacement of the respective second lateral inner attachment section 13a, 13b relative to the respective first lateral inner attachment section 12a, 12b, the respective traction force transmitting element 23 with this section is wound more tightly around the respective deflection element 24 or is unwound more tightly from the respective deflection element 24.

[0032] If the attachment 10 is to be transferred from the unfolded working position towards the folded transport position, the respective second lateral inner attachment section 13a, 13b is also pivoted relative to the first lateral inner attachment section 12a, 12b in a forced-coupled manner when the respective first lateral inner attachment section 12a, 12b is folded in relative to the middle attachment section 11. During this forced-coupled displacement of the respective second lateral inner attachment section 13a, 13b, the section of the respective traction-transmitting element 23 adjacent to the second end of the respective traction-transmitting element 23 is wound more tightly around the respective deflection element 24 for the respective traction-transmitting element 24.During the reverse displacement of the respective second lateral inner attachment section 13a, 13b relative to the respective first lateral inner attachment section 12a, 12b, the respective traction force transmitting element 23, namely the section adjacent to the second end thereof, is unwound more strongly from the respective deflection element 24.

[0033] The respective deflection element 24 is rotatably mounted on the respective second lateral inner attachment section 13a, 13b. A corresponding rotation axis is preferably located adjacent to the second end of the respective traction-transmitting element 23. The respective deflection element 23 is supported on an eccentric 29, which is fixedly connected to the respective first lateral inner attachment section 12a, 12b.

[0034] The respective eccentric 29 moves the respective deflection element 24 up and down about its axis of rotation on the respective second lateral inner attachment section 13a, 13b. The respective eccentric 29 ensures that the respective deflection element 24, during folding, reduces its distance from the pivot axis 16a, 16b between the respective first lateral inner attachment section 12a, 12b and the respective second lateral inner attachment section 13a, 13b to such an extent that, with a tensile force-transmitting element 23 designed as a cable, a cable vector always has sufficient leverage to the pivot axis 16a, 16b between the respective first lateral inner attachment section 12a, 12b and the respective second lateral inner attachment section 13a, 13b.

[0035] In the fully extended working position, the respective eccentric 29 ensures a higher position of the respective deflection element 24 so that the respective deflection element 24 does not protrude beneath the agricultural implement or attachment and reduce its ground clearance. In the illustrated embodiment, the respective traction-transmitting element 23 engages with its first end on a lever mechanism 25 of the central attachment section 11. Each lever mechanism 25 of the attachment 10 has a plurality of articulated links 26, 27, and 28. A first link 26 is articulatedly attached with a first end to a first region of the central attachment section 11.A second link 27 engages with a first end in an articulated manner on a second region of the central attachment section 11, preferably on the respective pivot axis 15a, 15b formed between the central attachment section 11 and the respective first lateral inner attachment section 12a, 12b. A third link 28 is positioned between the first link 26 and the second link 27, which third link 28 engages with a first end in an articulated manner on the second end of the first link 26 and with a second end in an articulated manner on a second end of the second link 27. The respective tensile force-transmitting element 23 engages with its first end in an articulated manner on the second end of the second link 27 and thus on the second end of the third link 28 of the respective lever mechanism 25.

[0036] The above design of the front attachment 10, in particular the number of front attachment sections 11, 12a, 12b, 13a, 13b, 14a, 14b, the number of mowing elements 19, the number of conveying elements 20 and the above-described displaceability of the lateral front attachment sections 12a, 12b, 13a, 13b, 14a, 14b to the central front attachment section 11 via the traction force transmitting element 23 and the lever mechanism 25, is purely exemplary in nature and not mandatory for the invention.

[0037] Features according to the invention, which are described in detail below, can also be used with differently designed attachments of an agricultural harvesting vehicle. Details of the agricultural attachment 10 according to the invention are described below with reference to Fig. 3 to 8 described.

[0038] The front attachment 10 has at least one guide element 30 for the crop. During harvesting, i.e., in the working position of the front attachment 10, cut crop material is guided against this guide element 30 to guide the cut crop material in the area of ​​the front attachment 10, specifically in the transverse direction of the front attachment 10, i.e., approximately perpendicular to the direction of travel or harvesting of a harvesting vehicle carrying the front attachment 10.

[0039] The Fig. 1 The guide element 30 engaging the attachment section 12a is designed as a guide bracket. The guide bracket is preferably U-shaped and has two lateral legs 32, 33, which are connected at first ends by a central leg 34 extending transversely to the lateral legs 32, 33, and which engage the attachment section 12a at the second end.

[0040] The guide bar 30 is used when moving the attachment from the transport position (see Fig. 8) out into the working position (see Fig. 3) against the spring force of a spring element (not shown) acting on the transport bracket 30 from a rest position of the guide bracket (see Fig. 8) into a functional position of the guide bar (see Fig. 3) can be displaced automatically via a mechanical coupling element 31.

[0041] When the attachment is moved from the working position of the attachment into the transport position of the attachment, the spring element automatically pushes the respective guide bracket 30 into the rest position.

[0042] The mechanical coupling element 31 is attached at a first end to the attachment section 11, which is adjacent to the attachment section 12a carrying the respective guide bracket 30. This end of the coupling element 31 is fixed to the attachment section 11, and its relative position to the attachment section 11 is therefore unchangeable. A second end of the mechanical coupling element 31 interacts with the guide bracket 30 mounted on the adjacent attachment section 12a, in the illustrated embodiment with the lateral leg 32 of the guide bracket 30.

[0043] The spring element (not shown) acting on the guide bar 30 pushes the guide bar 30 towards its rest position. When moving the attachment from the transport position, in which the guide bar 30 assumes its rest position (see Fig. 8), into the working position in which the guide bar 30 assumes its functional position (see Fig. 3), the coupling element 31 presses against the guide bracket 30 and thus presses the guide bracket 30 into its functional position against the spring force of the spring element (not shown).

[0044] The guide bracket 30 therefore rests with its leg 32 in the functional position and during transfer from the rest position to the functional position permanently on the coupling element 31, namely on the second end of the mechanical coupling element 31.

[0045] Fig. 6 and Fig. 7 show intermediate positions which the front attachment or the front attachment sections 11, 12a thereof as well as the guide bracket 30 engaging the front attachment section 12a assume when the front attachment is moved between the transport position and the working position.

[0046] Another special feature of the invention results from Fig. 4 and Fig. 5. So in Fig. 4 and Fig. 5 the guide bar 30 of the attachment 10 is shown in its functional position in the solid lines.

[0047] In this functional position, the guide bar 30 projects forward with its upper end relative to its lower end in the harvesting direction or direction of travel, and thus projects beyond the mowing elements 19 in sections.

[0048] The guide bracket 30 engages the attachment section 12a in such an articulated manner that the guide bracket 30, when the attachment assumes its functional position in the working position, can be automatically displaced from the functional position into a protective position against the spring force of the spring element (not shown) in order to protect the attachment from damage caused by foreign bodies coming into contact with the attachment, wherein Fig. 4 and Fig.5 two possible protective positions 30' and 30" of the guide bar 30 are shown in dashed lines. If a foreign body comes into contact with the guide bar 30 in the working position of the attachment or in the functional position of the guide bar 30 and presses against the guide bar 30, the guide bar can be displaced into a protective position or protective position 30', 30" against the spring force of the spring element acting on the guide bar 30.

[0049] Such guide bars 30 allow the cut crop to be guided in a defined manner, namely, after it has been separated, toward a central section of the front attachment. The guide bars 30 are therefore mounted on the side sections of the front attachment. No pneumatic, hydraulic, or electric actuators are required to move the guide bars 30 when moving the front attachment between the working position and the transport position. The movement of the respective guide bars 30 is achieved by a mechanical forced coupling with the aid of the coupling element 31.Furthermore, the respective guide bracket 30 is protected from damage since, when it assumes its functional position, it can be displaced from the functional position into a protective position against the spring force of the spring element and then automatically returns to its functional position due to the spring force of the spring element, in which it touches the second end of the mechanical coupling element 31. List of reference symbols 10 Attachment 11 Attachment section 12a, 12b Attachment section 13a, 13b Attachment section 14a, 14b Attachment section 15a, 15b Swivel axis 16a, 16b Swivel axis 17a, 17b Swivel axis 18 supporting element 19 Mowing unit 20 Funding body 21 Relocation facility 22 Relocation facility 23 traction force transmitting element 24 Deflection element 25 Lever mechanism 26 handlebars 27 handlebars 28 handlebars 29 eccentric 30 Guide element / guide bracket 31 Coupling element 32 legs 33 legs 34 legs

Claims

[1] Agricultural front attachment (10), in particular a maize header, with a central front attachment section (11), and with lateral front attachment sections (12a, 12b, 13a, 13b, 14a, 14b) adjoining both sides of the central front attachment section (11), wherein the lateral front attachment sections (12a, 12b, 13a, 13b, 14a, 14b) are displaceable when the front attachment (10) is displaced between a working position of the front attachment (10) and a transport position thereof relative to the central front attachment section (11), and wherein the front attachment sections (11, 12a, 12b, 13a, 13b, 14a, 14b) carry at least mowing elements (19) and preferably additionally conveying elements (20), and with at least one, a lateral A guide element (30) for harvested material is assigned to the front attachment section (12a, 12b, 13a, 13b, 14a, 14b) and is arranged behind the or each mowing element (19) and optionally conveying element (20) of the respective lateral front attachment section (12a,12b, 13a, 13b, 14a, 14b) and serves to guide the separated crop transversely to the direction of travel or harvesting direction in the direction of the central front attachment section (11), , characterized by that the or each guide element (30) is designed as a guide bracket (30) which, when the attachment (10) is moved out of the transport position of the attachment (10) and into the working position of the attachment (10), can be automatically moved against the spring force of a spring element from a rest position of the guide bracket (30) into a functional position of the same via a mechanical coupling element (31). [2] Attachment (10) according to claim 1, characterized bythat the respective guide bracket (30) engages the respective lateral attachment section (12a, 12b, 13a, 13b, 14a, 14b) in an articulated manner such that the respective guide bracket (30), when it assumes its functional position in the working position of the attachment (10), can be automatically displaced from the functional position into a protective position against the spring force of the spring element in order to protect the guide bracket (30) from damage by foreign bodies coming into contact with it. [3] Attachment (10) according to claim 1 or 2, characterized by that the respective guide bracket (30) is U-shaped and has two lateral legs (32, 33) which are connected at first ends via a central leg (34) and which engage at second ends on the respective attachment section (12a, 12b, 13a, 13b, 14a, 14b). [4] Attachment (10) according to one of claims 1 to 3, characterized bythat the mechanical coupling element (31) is fastened to an attachment section (11, 12a, 12b, 13a, 13b, 14a, 14b) which is adjacent to the attachment section (12a, 12b, 13a, 13b, 14a, 14b) carrying the respective guide bracket (30). [5] Attachment (10) according to claim 4, characterized by in that the mechanical coupling element (31) is fixed via a first end to the attachment section (11, 12a, 12b, 13a, 13b, 14a, 14b) which is adjacent to the attachment section (12a, 12b, 13a, 13b, 14a, 14b) carrying the respective guide bracket (30), wherein a second end of the mechanical coupling element (31) interacts with the guide bracket (30) mounted on the adjacent attachment section (12a, 12b, 13a, 13b, 14a, 14b). [6] Attachment (10) according to one of claims 1 to 5, characterized bythat the spring element automatically presses the respective guide bracket (30) into the rest position of the attachment (10) when the attachment (10) is moved from the working position of the attachment (10) into the transport position of the attachment (10).

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