阅读说明：本技术 用于收获的作物的谷穗升运机 (Ear elevator for harvested crops ) 是由 F·霍勒 于 2020-04-20 设计创作，主要内容包括：本发明涉及一种用于收获作物的谷物升运机,包括支承杆,所述支承杆在主延伸方向上延伸,并且具有在主延伸方向上一个接一个地布置的紧固部分、中间部分和滑动部分。(The invention relates to a grain elevator for harvesting crops, comprising a support bar which extends in a main direction of extension and has a fastening section, an intermediate section and a sliding section which are arranged one after the other in the main direction of extension.)

1. Ear elevator for crops, having a support bar (5), wherein the support bar extends in a main direction of extension (X) and is arranged with a fastening portion (10), an intermediate portion (11) and a sliding portion (12) one after the other in the main direction of extension, wherein the support bar has a restraining device (1) extending along the intermediate portion (11),

wherein the constraining means stiffens the intermediate portion with respect to bending stresses, wherein the stiffening of the constraining means in a first bending direction (Z) is greater than the stiffening in a second bending direction (-Z) opposite to the first bending direction,

wherein the restriction device (1) is connected to the intermediate portion (11) such that bending stresses cause a relative movement of the restriction device with respect to the intermediate portion, wherein the relative movement is more restricted under bending stresses in the first bending direction (Z) than in the second bending direction (-Z).

2. The ear elevator for crops as claimed in claim 1, characterized in that the restraining device (1) has a first end (8) and a second end (9).

3. The ear elevator for crops as claimed in claim 2, characterized in that said first end (8) is connected to said intermediate portion (11) of said support bar (5).

4. The ear elevator for crops as claimed in any one of the preceding claims, characterized in that said constraining means (5) comprise at least one first stop (6), wherein said first stop engages with a second stop (7) to block said relative movement under bending stress in said first bending direction (Z).

5. The ear elevator for crops as claimed in claim 4, characterized in that the second stop (7) is formed on the support bar (5).

6. The ear elevator for crops as claimed in any one of the preceding claims, characterized in that the restraining means (1) is formed as a plurality of parts with at least two restraining members (2, 2A, 2B).

7. The ear elevator for crops as claimed in claim 6, characterized in that each restraining member (2, 2A, 2B) is connected to the supporting bar (5) at the intermediate portion (11).

8. The ear elevator for crops as claimed in any one of claims 4 to 7, characterized in that the second stop (7) is formed on the restraining device (1).

9. The ear elevator for crops as claimed in any one of claims 4 to 8, characterized in that the first stop (6) is divided into at least two first partial stops (6 ') and the second stop (7) is divided into at least two second partial stops (7'), wherein the respective first partial stop engages with the respective second partial stop to block relative movement under bending stress in the first bending direction.

10. The ear elevator for crops as claimed in any one of claims 6 to 9, characterized in that the restraining members (2, 2A, 2B) are arranged angularly displaceable with respect to each other about an axis perpendicular to the main direction of extension (X), wherein angular displacements in the first bending direction (Z) are blocked by the restraining members and free in the second bending direction.

11. The ear elevator for crops as claimed in any one of claims 6 to 10, characterized in that the restraining means comprises a first restraining member (2A) and a second restraining member (2B), wherein the first restraining member is connected to the second restraining member via a pivot point (3).

12. The ear elevator for crops according to claim 11, characterized in that the first stop (6) is arranged at the pivot point (3), wherein the second stop (7) is arranged at the support bar (5).

13. The ear elevator for crops according to the preceding claims 9, 11 and 12, characterized in that one of the first partial stops (6 ') is arranged on the first restraining member (2A) and the other of the first partial stops (6 ') is arranged on the second restraining member (2B), wherein the second partial stop (7 ') is arranged on the support bar (5) or on the pivot point (3).

14. The ear elevator for crops as claimed in one of the preceding claims, characterized in that the support bar (5) has a recess (4) in the intermediate portion (11), wherein at least a part of the restraining device (1) extends through the recess, wherein the second stop (7) is formed in particular at the recess (4).

15. The ear elevator for crops as claimed in one of the preceding claims, characterized in that a retainer (14) is provided, wherein the retainer is arranged on the support bar (5) to provide abutment against the shearing fingers (15), wherein the retainer is formed on the restraining device (1).

Technical Field

The following disclosure relates to a ear elevator for crops having support barsThe support bar extends in a main extension direction and has a fastening portion, an intermediate portion and a sliding portion arranged one after the other in the main extension direction.

Background

Known cutting systems for harvesters have so-called cutter barsWith harvesting fingers arranged along the shearer shaftThe harvesting fingers guide the cutter bar and form secondary blades for the cutting blades, which are mounted on a reciprocating cutter bar (messerbaken). In order to be able to safely cut kinked or fallen stalks, the stalks are lifted using a grain elevator. Such an ear elevator comprises a support bar, the fastening portion of which can be fixed to the shearer bar and, if necessary, supported by a holder on the end of the cutting finger. Depending on the direction of travel of the harvester, the fastening portion forms the rear end of the support bar, at the opposite front end of which is typically attached a straw lifting member. This front end of the straw lifter is guided as close to the ground as possible. In order to be able to follow uneven ground, the support bars of known ear lifts are usually made of spring steel. Such an ear elevator is known, for example, from EP 1256271 a 1.

In the case of particularly uneven ground or rocks on the ground, the front end of the ear elevator can penetrate into the ground. A disadvantage of the known ear lifts with support bars made of spring steel is that the support bars can be deflected downwards, i.e. into the ground, by the resistance of the front end penetrating into the ground, which further increases the resistance. In such a case, the ear elevator is typically severely damaged to the extent that it must be replaced.

Disclosure of Invention

One object of the invention is to propose an ear elevator whose support bars are able to follow the unevenness of the ground and are less prone to damage when the support bars are briefly deflected into the ground.

This object is achieved by the subject matter of claim 1. Embodiments and further developments are specified in the dependent claims.

According to one aspect, a grain ear elevator for crops has a support rod, wherein the support rod extends in a main extension direction. The support bar comprises a fastening portion, an intermediate portion and a sliding portion, arranged one after the other in the main extension direction. The support bar is an elongated member extending in the main extension direction and is preferably made of a flat material. In the main direction of extension, the support rod has a curved, arched, non-linear shape. When the ear elevator is mounted on the harvesting machine, the main extension direction corresponds to the travelling direction of the harvesting machine. In this case, the fastening portion is located at the rear in the traveling direction, and the sliding portion is located at the front in the traveling direction. The support bar may have additional sections in front of, behind, or between the sections. For example, the front end of the support rod is usually located in front of the slide portion in the traveling direction. In the sense of the invention, the intermediate part means a section of the support bar between the sliding part and the fastening part, wherein the exact position of the intermediate part is not fixed as the actual center of the support bar.

The support bar has a restraining means which has a reinforcing effect with respect to bending stresses on the intermediate portion. The stiffening effect of the intermediate portion by the restraining means is greater with respect to the bending stress of the intermediate portion in a first bending direction than in a second bending direction opposite to the first bending direction.

One advantage of the ear elevator is that the support bars can be designed to elastically deform when bending stress is applied in the second bending direction to compensate for unevenness of the ground. The intermediate portion of the support bar is essentially the elastically deformable portion for this purpose. Elastically deformable in the sense of the present invention means that the intermediate portion is capable of bending at least in such a way that the sliding portion is deflected by one centimeter without plastic deformation of the intermediate portion taking place. Since the support bar is fixed to the harvester at the fastening portion in the mounted state, while the front end is free, the support bar provides the bending properties of the cantilever. In the mounted state of the support bar, the offset in the second bending direction corresponds to an upward deflection of the support bar. The opposite first bending direction corresponds accordingly to a downward deflection, wherein the front end of the support rod can penetrate into the ground. The locking element advantageously prevents the middle section from bending in the first bending direction, so that the support bar as a whole can only be deflected slightly downward, i.e. in the first bending direction. This advantageously avoids the penetration of the front end of the support rod into the ground. Since the bending stress of the restraining means with respect to the second bending direction, i.e. upwards, has a smaller influence on the bending behaviour of the intermediate portion, the support bar is more prone to deflect upwards under bending stress in the second bending direction than under bending stress in the first bending direction. As a result, the sliding portion can favorably follow uneven ground.

According to one embodiment, the constraint means is ineffective against bending stresses in the intermediate portion in the second bending direction. In the sense of the present invention, ineffective means that the restraining means has no significant effect on the bending properties of the intermediate portion when the intermediate portion is subjected to a bending stress in the second bending direction.

For example, the support bar is made of a flat material, wherein the first bending direction and the second bending direction are aligned perpendicular to the second extension direction and the main extension direction of the support bar. The main extension direction refers to the direction in which the support bar has the largest extension. The second direction of extension denotes the direction of the second largest extension of the support bar behind the main direction of extension. The extension of the support bar in the bending direction or in the first bending direction and the second bending direction therefore corresponds to the thickness of the support bar in the case of a flat material. In this case, the support rod does not run straight in the main direction of extension, but is curved. The curved support bar thus has several sections in the extension direction and in the first and second bending directions.

According to an embodiment, the restriction device extends along and is connected to the intermediate portion. The term "connected" in the broadest sense of the present invention means the possibility of force transmission from the restriction device to the intermediate portion and/or vice versa. In this context, the restriction device may be designed integrally with the intermediate portion or be connected by fastening means, such as screws, welding or rivets. Also, a releasable push-fit connection may be provided between the restraining means and the intermediate portion. Alternatively, the following embodiments may be envisaged: wherein the restriction device spans the intermediate portion and provides reinforcement to the intermediate portion, e.g. via the sliding portion and/or via the fastening portion.

The restriction device has, for example, a tensioning element and/or a pressure element. The pressure element is subjected to a pressure under a bending stress in the first bending direction and thus has a reinforcing effect with respect to the bending stress in the intermediate portion. The reinforcing effect of the pressure element is greater with respect to the bending stress on the intermediate portion in the first bending direction, because the pressure element absorbs the compressive force, while when the intermediate portion is subjected to the bending stress in the second bending direction, it is, for example, free to move or at least absorbs a smaller force. Additionally or alternatively, the restriction device has a tensioning element. The tensioning element is subjected to tensile stress under bending stress in the first bending direction and thus has a reinforcing effect with respect to the bending stress on the intermediate portion. The stiffening effect of the tensioning element with respect to the bending stress in the middle section in the first bending direction is greater than in the second bending direction, since the tensile force which can be transmitted via the tensioning element is greater than the compressive force which can be transmitted via the tensioning element. The tensioning element is for example a rope or a spring leaf.

According to another embodiment, the restriction device has a first end and a second end, wherein the first end is connected to the middle portion of the support bar. For example, the restriction device is connected to the intermediate portion at least one point. According to an embodiment, two or more connections of the restriction device to the intermediate portion are provided.

According to an embodiment, the restriction device thus forms a joint with the intermediate portion, wherein the movement of the joint is blocked by a bending stress of the intermediate portion in the first bending direction in at least one degree of freedom of the joint. The movement of the joint in at least one degree of freedom is free due to the bending stress of the intermediate portion in the second bending direction. As a result, the joint formed by the intermediate portion and the restraining means is reinforced with respect to the bending stress of the intermediate portion in the first bending direction, and not with respect to the bending stress of the intermediate portion in the second bending direction.

According to an embodiment, provision is made for the relative movement of the restriction device with respect to the intermediate portion to be induced under bending stress, wherein the relative movement is more restricted under bending stress in a first bending direction than under bending stress in a second bending direction. It is particularly preferred that the relative movement under bending stress is blocked in the first bending direction by the restraining means.

According to an embodiment, the restriction device comprises at least one first stop, wherein the first stop cooperates with a second stop to block relative movement under bending stress in the first bending direction. In particular, the first stop cooperates with the second stop such that, under bending stress in a first bending direction, the movement of the joint in at least one degree of freedom is blocked.

According to one exemplary embodiment, it is provided that the second stop is formed on the support rod.

Furthermore, the restriction device may be formed as a plurality of parts having at least two restriction members. The multipart restraining device is formed, inter alia, by interconnected restraining members. For example, the constraining members are designed to be movable relative to each other. In particular, the restriction member of the restriction device forms a restriction member joint. For example, a plurality of restraining members are connected to the support bar at the intermediate portion. In particular, all the constraint members of the constraint device are connected to the support bar in the intermediate portion.

According to a further preferred embodiment, it is provided that the second stop is formed on the restraint device.

According to an embodiment, it is provided that the first stop is divided into at least two first partial stops and the second stop is divided into at least two second partial stops, wherein the respective first partial stops cooperate with the respective second partial stops to block the relative under bending stress in the first bending direction or to block the movement of the joint in at least one degree of freedom thereof. In the sense of the present invention, a first partial stop and a second partial stop are to be understood as separate stops, which are referred to herein as "partial stops", since the first partial stop and the second partial stop together have the same function as a separately formed first stop and a separately formed second stop. For this purpose, the first partial stop and the second partial stop do not have to be in contact with one another at the same time under the bending stress in the first bending direction, but this can also occur offset in time.

According to an embodiment, the constraining member is angularly displaceable with respect to each other about an axis perpendicular to the main direction of extension, wherein an angular displacement in the first bending direction is obstructed by the constraining member and free in the second bending direction. The joint formed by the intermediate portion and the restraining means is in this case a swivel joint. In this case, the restraining member joint formed by the restraining member is also a swivel joint.

According to an embodiment it is provided that the restriction device comprises a first restriction member and a second restriction member, wherein the first restriction member is connected to the second restriction member via a pivot point. In the sense of the present invention, the term "pivot point" is to be understood as a component connecting the first restriction member to the second restriction member and enabling angular displacement of the first restriction member relative to the second restriction member. The term "pivot point" does not limit the components to a point-like configuration. In particular, the pivot point may be formed as a stud, wherein the pivot joint formed by the first and second restriction members and the pivot point is formed in the manner of a hinge. The pivot point formed as a stud does not necessarily have to have an elongated shape. But rather it is specified that the pivot point formed as a stud has a diameter greater than its length.

According to an embodiment, the first stop is arranged at the pivot point, wherein the second stop is arranged at the support bar. According to an embodiment, the first stop at the pivot point allows angular displacement of the first restraining member relative to the second restraining member under bending loads in the second bending direction by moving the first stop away from the second stop on the support bar. Under bending stress in the first bending direction, the first stop contacts a second stop on the support bar at the pivot point, thereby blocking further angular displacement of the first restraining member relative to the second restraining member. The first stop is formed in particular as a shoulder or projection on the screw-cylindrical pivot point. The second stop on the support bar is preferably formed by the support bar itself.

According to an embodiment, one of the first partial stops is arranged on the first constraint member and the other of the first partial stops is arranged on the second constraint member, wherein the second partial stop is arranged on the support rod. This embodiment is an alternative to the above-described embodiment, which has substantially the same effect. Instead of a first stop at the pivot point, two separate first partial stops are arranged on the first and second restraining members, which contact the support bar under bending stress in the first bending direction and thus block further angular displacement of the first restraining member relative to the second restraining member in the first bending direction. The second partial stop is preferably formed by points on the support rod at which the first partial stop is in contact with the support rod.

According to an embodiment, it is provided that one of the first part stops is arranged on the first restraint member and the other of the first part stops is arranged on the second restraint member, wherein the second part stop is arranged on the pivot point. To this end, in particular, the pivot point is configured such that the first restraining member is angularly displaceable relative to the second restraining member over a first circumferential range of the pivot point, while angular displacements of the first and second restraining members are blocked over a second circumferential range of the pivot point. Preferably, for this purpose, the pivot point of the stud shape has a cross-section deviating from a circular shape. The region deviating from the circular shape also forms a second partial stop in the second circumferential range.

According to an embodiment it is provided that the support bar has a recess in the intermediate portion, wherein the restriction device extends at least partially through the recess. The joint formed by the intermediate portion and the restraining means corresponds to a rotating cylindrical joint. Preferably, the second stopper is formed on the recess. As a result, the thrust movement in the rotary cylindrical joint is advantageously blocked by the second stop. In particular, the first stop is formed on the restraining means.

According to one embodiment, it is provided that the holder is arranged on the support bar, wherein the holder serves to provide a support on the harvesting fingers. Particularly preferably, the retainer is formed on the restraining means. For example, the retainer forms the second end of the restriction device.

The invention is explained in more detail below by means of embodiments with reference to the drawings. The embodiments are exemplary and do not limit the general inventive concept.

Drawings

Shown in the drawings are:

figures 1a and 1b show a first embodiment of an ear elevator according to the invention in various views,

figures 2a, 2b and 2c show in various views a further embodiment of an ear elevator according to the invention,

figures 3a, 3b and 3c show in various views a further embodiment of an ear elevator according to the invention,

figures 4a and 4b show in various views a further embodiment of an ear elevator according to the invention,

figures 5a and 5b show in various views a further embodiment of an ear elevator according to the invention,

figures 6a, 6b and 6c show in various views a further embodiment of an ear elevator according to the invention,

figures 7a and 7b show in various views another embodiment of an ear elevator according to the invention,

figures 8a, 8b and 8c show in various views a further embodiment of an ear elevator according to the invention,

figures 9a and 9b show in various views a further embodiment of an ear elevator according to the invention,

figures 10a and 10b show a variant of the embodiment according to figure 2a in various views,

figures 11a, 11b and 11c show a variant of the embodiment according to figure 9a in various views,

figures 12a and 12b show in various views a further embodiment of an ear elevator according to the invention,

figures 13a and 13b show in various views a further embodiment of an ear elevator according to the invention,

figures 14a and 14b show in various views a further embodiment of an ear elevator according to the invention,

figures 15a, 15b and 15c show in various views a further embodiment of an ear elevator according to the invention,

figures 16a, 16b, 16c and 16d show in various views another embodiment of an ear lift according to the invention,

fig. 17a, 17b, 17c and 17d show in various views another embodiment of an ear elevator according to the present invention.

Detailed Description

Fig. 1a and 1b show a first embodiment of an ear lift according to the invention, wherein fig. 1a shows a side view and fig. 1b shows a perspective view. The ear lift for crops according to the invention has a support bar 5 which extends in a main direction of extension X. The main extension direction X is shown by an arrow in fig. 1 a. When the ear elevator is installed according to the invention, the main extension direction X corresponds to the travel direction of the harvester. As can be seen in the perspective view of fig. 1b, the support bar 5 is made of a flat material, the second direction of extension Y of which is oriented orthogonally to the main direction of extension X. In fig. 1a, the second extension direction Y points towards the drawing plane. A third spatial direction orthogonal to the main extension direction X and the second extension direction Y is denoted by reference sign Z, wherein the third spatial direction Z is shown in fig. 1a by two arrows. The arrow marked with the reference Z indicates a positive direction, while the arrow marked with-Z indicates the opposite, i.e. negative direction. In operation, the ear elevator is guided close above the ground, which causes it to be deflected by uneven ground or large rocks on the ground. For this purpose, the support rods 5 are designed to be flexible at least in some regions, so that the support rods 5 can be bent in the spatial direction Z. In the following, the positive spatial direction Z is referred to as a first bending direction Z, while the opposite spatial direction-Z is referred to as a second bending direction-Z. If the support bar 5 is bent in the first bending direction Z, for example, because the tip 17 of the ear lift has penetrated irregularities in the ground, there is a risk that the support bar 5 will bend further in the direction of the first bending direction Z and that the elastic restoring force of the support bar 5 will be insufficient to return the tip 17 of the ear lift above the ground. In this case, plastic deformation occurs in the first bending direction X, and therefore, it is necessary to replace the damaged ear elevator. The ear elevator according to the invention avoids this problem.

The support bar 5 has a fastening portion 10, an intermediate portion 11 and a sliding portion 12 arranged one behind the other in the main direction of extension X. With respect to the direction of travel of the harvester, the fastening portion 10 is arranged at the rear and serves as a shearer bar for fastening the support bar to a not shown harvester. The sliding portion 12 is located near the front end 17 or the end 17 of the support rod 5. The sliding portion 12 is used to guide the ear elevator above the ground. Typically, a straw lifter 16 is attached to the front end 17 of the support bar 5. A holder 14 is arranged on the underside of the support bar 5 for receiving harvesting fingers (not shown) of the harvester. The intermediate portion 11 of the support bar 5 is the portion where the deflection of the support bar 5 substantially takes place. The intermediate portion 11 is arranged between the fastening portion 10 and the sliding portion 12, rather than being defined at the actual center of the support bar 5, and does not necessarily directly abut the adjacent fastening portion 10 and sliding portion 12.

The basic configuration of the ear elevator according to the present invention described so far is also applicable to further embodiments to be described below, and therefore the basic configuration of each embodiment will not be described below. The main extension direction X, the second extension direction Y, the first bending direction Z and the second bending direction-Z are only shown in fig. 1a, but are also applicable to all side views of the embodiments to be described below.

In the embodiment according to fig. 1a and 1b described below together, the support bar 5 has the restriction device 1 in the intermediate portion 11. The constraint device 1 has a stiffening effect on the bending stress in the intermediate portion 11 in the first bending direction Z. In contrast, the constraint device 1 is ineffective with respect to bending stresses on the intermediate portion 11 in the second bending direction-Z. In the sense of the present invention, "ineffective" is understood to mean that the bending of the support bar in the second bending direction-Z is possible and not impeded by the constraint device 1. The restraining device 1 has a front end 8 and a rear end 9, wherein the terms "front" and "rear" refer to the direction of travel of the harvesting machine. In the exemplary embodiment shown, the front end 8 of the restriction device 1 is connected to the support rod 5, wherein the type of connection can be selected as desired. In the shown embodiment the front end 8 of the restriction device 1 is e.g. welded to the support bar 5. The restraint device 1 is, for example, a metal plate, the main extension direction of which is arranged in the main extension direction X and the bending direction Z. Such a plate, which is arranged substantially perpendicular to the flat material of the support bar 5, is also referred to as a reinforcing plate, for example. In the exemplary embodiment shown, the support bar 5 has a recess 4 in the form of a slot in the intermediate portion 11, wherein the plate of the restriction device 1 extends through the slot. As a result, the restraining device 1 is guided, for example, in the recess 4 and cannot be bent in the second direction of extension Y. The restriction device 1 is not connected to the support bar 5 at a plurality of points or over its entire length in the manner of a reinforcement plate, since such reinforcement hinders or substantially prevents bending of the support bar 5 not only in the first bending direction Z but also in the second bending direction-Z. Alternatively, the restraining device 1 is connected to the support bar 5 only at its front end 8 and has a first stop 6 at its rear or second end 9, which stop 6 rests against a second stop 7 on the support bar 5. The second stop 7 on the support rod 5 is formed by a bend in the support rod 5. When the support bar 5 is subjected to bending stress in the second bending direction-Z, the support bar 5 bends in the elastically formed intermediate portion 11, so that the first stop 6 on the restraint device 1 moves away from the second stop 7 on the support bar 5. The restriction device 1 thus does not prevent bending of the support bar 5 in the second bending direction-Z. Conversely, when a bending stress is applied in the first bending direction Z, the first stop 6 on the restraint device 1 is pressed against the second stop 7 on the support rod 5, so that the restraint device 1 has a reinforcing effect against the deflection of the support rod 5. In other words, the restriction device 1 forms a joint, in this case a rotational-sliding joint, with the intermediate portion 11 of the support rod 5, as the restriction device 1 is guided in the slot-shaped recess 4. The rotational-sliding movement caused by the bending stress on the support rod 5 in the first bending direction Z is blocked by a first stop 6 on the restraint device 1 and a second stop 7 on the support rod 5, while the rotational-sliding movement of the joint is possible under the bending stress on the support rod 5 in the second bending direction-Z.

Fig. 2a shows a further embodiment of the ear lift according to the invention in a side view. Fig. 2b shows the middle part 11 of the support rod 5 in a perspective view in detail, while fig. 2c shows the locking element in a perspective view in detail. Fig. 2a, 2b and 2c will be described together below. In the shown embodiment, the restriction device 1 comprises a plate shaped member attached to the support bar 5 by the first end 8 of the restriction device 1 via a fastening element 18. The plate-like member of the restriction device 1 has its main extension direction in a plane defined by the main extension direction X and the second extension direction Y. The constraint device 1 with its plate-shaped element is therefore arranged substantially parallel to the support bar 5 and rests against it. The restriction device 1 has a guiding element 22, which protrudes perpendicularly from the plate-shaped member, which is guided through the slot-shaped recess 4 of the support bar 5. At the rear second end 9 of the restraint 1, a holder 14 for harvesting fingers is provided. A first stop 6 is formed on the upper side of the restraint device 1 facing the support bar 5, while a second stop 7 is formed on the lower side of the support bar 5 facing the restraint device 1. When a bending stress is applied to the support bar 5 in the first bending direction Z, the first stop abuts against the second stop, so that the restraining means acts as a reinforcement of the support bar 5 in the intermediate portion 11. Conversely, when the support bar 5 is subjected to bending stresses in the second bending direction-Z, the second end 9 of the constraint device 1, which is not connected to the support bar 5, moves away from the support bar 5, so that the first stop no longer bears against the second stop. As a result, the restraint device 1 has no significant effect on the bending behaviour of the support bar 5 in the second bending direction-Z. The holder 14 formed on the restraining element 1 is therefore dimensioned larger than usual so that the harvesting fingers (not shown) to which the holder 14 fits provide sufficient clearance to ensure deflection of the support bar 5 in the second bending direction-Z.

Fig. 3a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 3b shows the embodiment in a perspective view. In fig. 3c, the detail is shown enlarged in a further perspective view. Fig. 3a, 3b and 3c will be described together below. The restriction device 1 is attached to the support bar 5 by a first end 8 and essentially comprises a sheet material, the main extension direction of which is oriented perpendicular to the support bar 5. The guide element 22 of the restriction device 1 is guided in the slot-shaped recess 4 of the support bar 5. A first stop 6 on the restraint device 1 is formed at its second end 9 and abuts a second stop 7 on the support bar 5. In the exemplary embodiment, the second stop 7 is formed by a fastener 18 by means of which the holder 14 is fastened to the upper side of the support bar 5. The fastener 18 is, for example, a rivet head. When the support bar 5 is subjected to a bending load in the first bending direction Z, the relative movement of the restraint device 1 with respect to the support bar 5 is blocked, since the first stop 6 rests against the second stop 7. The movement of the restriction device 1 in the main extension direction X relative to the support bar 5 is limited by the fastener 18. The restriction device thus has a stiffening effect. Under a bending load of the support bar 5 in the second bending direction-Z, the first stop 6 moves away from the second stop 7. The restraint device 1 is able to move relative to the support bar 5 and therefore does not stiffen the support bar 5 against bending loads in the second bending direction-Z.

Fig. 4a shows a further embodiment of the ear elevator according to the invention in a side view. In fig. 4b, the middle part 11 of the support rod 5 is shown in a perspective view. The restriction device 1 is connected to the support bar 5a at its front end 8 by means of two fastening elements 18. In the exemplary embodiment shown, the restriction device 1 is formed in two parts and comprises a first restriction member 2A and a second restriction member 2B. The attached front end 8 is arranged on the first restriction member 2A. In the exemplary embodiment, the second end 9 of the restriction device is also connected to the support rod 5 by a fastener 18. The second end 9 is located at the second restraining member 2B. The support bar 5 has a slot-shaped recess 4 in which a guide element 22 of the restriction device is guided. The first restraining member 2A is connected to the second restraining member 2B via a pivot point 3, which pivot point 3 also extends through the recess 4. The pivot point 3 is in particular a disc which is separated from the first 2A and second 2B restraining members by a slot 19. The pivot point 3 thus works in the manner of a hinge. The pivot point is not connected to the second binding member 2B. The pivot point 3 is connected to the first binding member 2A via the link 20, since the slot 19 does not extend into the area around the link 20. In the embodiment shown, there are now a plurality of first and second stops acting together to allow the support bar 5 to be stiffened by the constraint device 1 under bending stress in a first bending direction Z, rather than in the opposite second bending direction-Z. In the case of a plurality of spatially separated stops, the designations first partial stop 6 'and second partial stop 7' are used below. The first part stop 6' is arranged in the surrounding area of the slot 19, i.e. at the first restriction member 2A and at the pivot point 3. The first partial stops 6 'each rest against the second partial stop 7', so that they are also arranged in the surrounding area of the slot 19, i.e. at the pivot point 3 and at the second restraining member 2B, respectively. Under bending stress of the support bar 5 in the first bending direction Z, the first partial stop 6 'presses against the second partial stop 7' and the restraint device 1 has a reinforcing effect. On the other hand, when the support bar 5 is subjected to bending stresses in the second bending direction-Z, the first partial stop 6 'moves away from the second partial stop 7' and the second constraint member 2B rotates about the pivot point 3 and thus changes its angular position with respect to the first constraint member 2A, while the support bar 5 deflects in the second bending direction-Z. The restriction device 1 is not stiffened in this case.

Fig. 5a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 5b shows the middle section 11 of the support rod 5 in an enlarged detail. In fig. 5c, another detail is shown separately. In the embodiment shown, the restriction device 1 is provided with a plurality of restriction members 2 not directly connected to each other. Each binding member 2 is connected to the intermediate portion 11 of the support bar 5 by means of a fastener 18. In fig. 5c, a single restraining member 2 is shown in perspective view. It has a hole 21 for receiving the fastener 18. The first part stops 6 ' are each arranged on one side of the cuboid restraining member 2, while the respective second part stop 7 ' is formed on the surface opposite to the first part stop 6 '. Thus, the first partial stop 6 'and the second partial stop 7' are always in contact with each other between two adjacent constraining members 2. In the illustrated embodiment, one of the restraining members 2 carries a holder 14 for receiving a harvesting finger (not shown). The restraining members are not directly connected to each other, but indirectly via a support bar 5. Under bending stress of the support bar 5 in the first bending direction Z, the first partial stop 6 'presses against the second partial stop 7' and the binding members 2 together form a reinforced binding device 1. In contrast, under bending stress in the opposite second bending direction-Z, the first partial stop 6 'moves away from the second partial stop 7' and the separate constraining member 2 has no influence on the bending performance of the support bar 5.

Fig. 6a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 6b shows the middle section 11 of the support bar 5 in a detail in an enlarged perspective view. Figure 6c shows a perspective view of the restriction device in isolation and in isolation. Fig. 6a, 6b and 6c are depicted together. As can be seen most clearly in fig. 6c, the restriction device comprises three separate, unconnected, separate parts, a first restriction member 2A, a pivot point 3, and a second restriction member 2B. The first restriction member 2A comprises the first front end 8 of the restriction device 1 connected to the intermediate portion 11 of the support bar 5 by a fastener 18. The second restriction member 2B comprising the second rear end 9 of the restriction device 1 is also connected to the central portion 11 of the support rod 5 by fastening means 18. Further, the retainer 14 is arranged on the second binding member 2B. The restriction device forms a rotational joint, wherein the pivot point 3 is in the form of a disc arranged in a respective semi-circular configuration of the first 2A and second 2B restriction members. Thus, the first restraining member 2A is angularly displaceable relative to the second restraining member 2B via the pivot point 3. The plate-shaped parts of the first 2A and second 2B restraining members forming the joint and the pivot point 3 have their main extension direction in a plane spanned by the first bending direction Z and the main extension direction X. The support bar 5 extending perpendicularly thereto has a slot-shaped recess 4 through which the first and second restraining members 2A, 2B and the pivot point each extend partially. The pivot point 3 has a shoulder forming a first part stop 6'. The shoulder extends in a straight line substantially through the center of the pivot point. As a result, the thickness of the semicircular part of the disc forming the pivot point 3 in the second direction of extension Y is greater than the second, also approximately semicircular half of the disc. The shoulders forming the first part stop 6 'are preferably formed on both sides of the pivot point, so that the pivot point has two first part stops 6'. As can be seen in particular from fig. 6a and 6b, the partial stop 6 'formed as a shoulder at the pivot point 3 is in contact with the support rod 5, so that a corresponding second partial stop 7' is formed on the support rod 5. Under bending load of the support bar 5 in the first bending direction Z, the first restraining member 2A cannot rotate relative to the second restraining member 2B about the pivot point because both the first and second restraining members 2A, 2B are connected to the support bar 5. To allow such angular displacement, the pivot point 3 and the plate-shaped part of the first 2A and second 2B restraining members will have to be moved further through the slot-shaped recess 4. However, this is prevented by the first stop 6 'at the pivot point, since the shoulder forming the first part stop 6' abuts the support bar 5 at the pivot point and thus prevents the pivot point from moving further through the recess 4. For this reason, the restraint device 1 has a reinforcing effect on the bending moment in the first bending direction Z. On the other hand, when the support bar 5 is subjected to bending stress in the second bending direction-Z, the first restraining member 2A is displaceable relative to the second restraining member 2B about the pivot point 3, as the pivot point 3 moves downwardly out of the recess 4 in the direction of the first bending direction Z. In this way, the first partial stop 6 'at the pivot point 3 is moved away from the second partial stop 7' at the support bar 5, so that the deflection of the support bar 5 in the second bending direction-Z is not significantly influenced by the restriction device 1. In fig. 6c, the surface of the semi-circular recesses on the first and second restraining members 2A, 2B is additionally designated as a first part stop 6'. They interact with the side surface of the disc-shaped pivot point 3 as a second partial stop 7'.

Fig. 7a shows a further embodiment of the ear lift according to the invention in a perspective view. Fig. 7b shows an enlarged embodiment in detail in a side view. Fig. 7c and 7d show enlarged details in a further perspective view. Fig. 7a, 7b, 7c and 7d will be described together. The restriction device 1 is attached to the support rod 5 by a first end 8. The guide element 22 of the restriction device 1 is guided in the slot-shaped recess 4 of the support bar 5. A first stop 6 on the restraint device 1 is formed in the surrounding area of the second end 9 on its upper side facing the support rod 5 and rests against a second stop 7 on the support rod 5. In the exemplary embodiment, the second stop 7 is formed by a fastener 18 by means of which the holder 14 is fastened to the upper side of the support bar 5. The fastener 18 is, for example, a rivet head. When the support bar 5 is subjected to bending stresses in the first bending direction Z, the first stop 6 rests against the second stop 7. The second end 9 presses up against the fastener 18. Thus, the restraining device 1 has a reinforcing effect. Under a bending load in the second bending direction-Z of the support bar 5, the first stop 6 moves away from the second stop 7, because the second end 9 is not connected to the support bar 5. The restriction device 1 thus has a reduced stiffening effect on the support bar 5 with respect to bending stresses in the second bending direction-Z.

Fig. 8a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 8b shows the middle section 11 of the support bar 5 in a detail in an enlarged perspective view. In fig. 8c, the restriction device 1 is shown separately in perspective view as a detail in its various parts. In the embodiment shown, the restriction device 1 is designed as a plate shaped member, the main extension direction of which lies in a plane spanned by the main extension direction X and the second extension direction Y. Thus, the plate-shaped restraining means are arranged parallel to the support bar 5. The first end 8 of the restriction device 1 is connected to the support rod 5 by a fastener 18. The second end 9 of the restriction device 1 is not connected to the support rod 5. In fig. 8c it can be seen that the restriction device 1 has a hole 21 at its first end 8 for receiving the fastener 18. The restraining means 1 presents a bend at about half the length seen in the main extension direction X, so that the rear part of the restraining means 1 with the second end 9 protrudes from the support bar 5 by about one plate thickness of the restraining means, while the front part of the restraining means 1 with the first end 8 rests directly against the support bar 5. The rear part with the second end 9 of the restriction device 1 has a receiving opening 23 for receiving an insert 24. The insert 24 consists of a plate-shaped part, the second end 9 of which is arranged parallel to the rear part of the restriction device 1, such that the plate-shaped part of the insert 24 is located between the rear part of the restriction device 1 and the support bar 5. The two guide elements 22 extend from the plate-shaped part of the insert 24 substantially perpendicularly thereto, so that they enclose the support bar 5 on both sides. The two guide elements 22, which surround the support bar 5 on the outside, fulfil the same function as the guide elements in the other embodiments, which are guided by slot-shaped recesses in the support bar, i.e. prevent a lateral deflection of the restriction device 1 in the second direction of extension Y. Furthermore, a holder 14 for receiving harvesting fingers is arranged on the insert 24. The holder 14 has a shape corresponding to the receiving opening 23 such that the holder 14 can be inserted into the receiving opening 23 and is arranged on the side of the restriction device 1 opposite to the support bar 5 when the restriction device 1 is mounted.

The plate-shaped element of the insert 24 has a first stop 6 on its side facing the support bar 5. The side of the support bar facing the restriction device 1 thus forms a second stop 7. When a bending stress is applied to the support bar 5 in the first bending direction Z, the first stop rests against the second stop, so that the restraint device 1 acts as a reinforcement of the support bar 5 in the intermediate portion 11. When the support bar 5 is subjected to a bending load in the second bending direction-Z, the restraint device 1 does not bend as well, since the first stop 6 moves away from the second stop 7, for which purpose the holder 14 must again have a corresponding clearance on the harvesting fingers. The deflection of the support bar in the second bending direction-Z is not significantly affected by the restriction device 1.

Fig. 9a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 9b shows the middle section 11 of the support bar 5 in a detail in an enlarged perspective view. In the embodiment shown, the restriction device 1 differs from the embodiment according to fig. 8a in that it is formed in one piece. Furthermore, the restriction device 1 has a guide element 22 guided in the slot-shaped recess 4. The first end 8 of the restriction device 1 is connected to the support rod. The constraint device 1 is substantially formed by a plate-shaped element extending substantially in a plane spanned by the first bending direction Z and the main extension direction X. The plate-shaped element of the restraining means is thus oriented perpendicularly to the support bar 5. The second end 9 of the restriction device 1 is formed by a holder 14, the upper side of which facing the support bar 5 forms a first stop. The underside of the support rod 5 facing the holder 14 thus forms the second stop 7. When the support bar 5 is subjected to bending stresses in the first bending direction Z, the first stop 6 bears against the second stop 7, so that the restraint device 1 acts as a reinforcement of the support bar 5 in the intermediate portion 11. Conversely, when the support bar 5 is subjected to bending stresses in the second bending direction-Z, the second end 9 of the constraint device 1, which is not connected to the support bar 5, moves away from the support bar 5, so that the first stop 6 no longer bears against the second stop 7. Thus, the restriction device 1 has no significant effect on the bending behaviour of the support bar 5 in the second bending direction-Z.

Fig. 10a shows a side view of a variant of the embodiment according to fig. 2a, which can only be distinguished by its shape. Fig. 10b shows the middle section 11 of the support bar 5 in detail in an enlarged perspective view. In addition, reference is made to the description of fig. 2a, 2b and 2c, since the embodiments shown there are functionally identical.

Fig. 11a shows a side view of a variation of the embodiment shown in fig. 9a, only concerning the design. Fig. 11b shows the middle section 11 of the support bar 5 in detail in an enlarged perspective view. In fig. 11c, the restriction device 1 is shown separately in perspective view as a detail. In fig. 11c it can be seen that the holder 14 is connected to the guide element 22 or formed in one piece, such that the holder 14 and the guide element 22 form the restriction device 1 with the first end 8 arranged for attachment. For functional background, reference is made to the description of fig. 9a, 9b and 9 c.

Fig. 12a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 12b shows the middle section 11 of the support bar 5 in detail in an enlarged perspective view. In the exemplary embodiment shown, the restriction device 1 is made of several parts. The restriction device 1 comprises a first restriction member 2A, a second restriction member 2B and a pivot point 3. A first restraining member having a first end 8 of the restraining device 1 is attached to the support bar 5 by a fastener 18. Likewise, a second restraining member 2B having a second end 9 of the restraining device 1 is attached to the support bar 5 by fasteners 18. A holder 14 for harvesting fingers is formed on the second restraining member 2B. The first and second restraining members 2A, 2B and the pivot point 3 form a swivel joint. To this end, the first 2A and second 2B restraining members have plate-shaped parts with cut-outs in which the pivot points 3 are accommodated. The pivot point 3 is also plate-shaped, wherein the main extension direction of the plate-shaped parts of the first 2A and second 2B restraining members and the pivot point 3 are arranged in a plane spanned by the main extension direction X and the first bending direction Z. Said parts of the restriction device 1 are thus aligned perpendicular to the support bar 5 and extend through the recess 4 of the support bar 5. The plate-shaped parts of the first 2A and second 2B restriction members thus also form the guiding element 22. In the exemplary embodiment shown, pivot point 33 does not have a circular shape. In contrast, approximately straight edge regions of the pivot point 3 are provided in the section below the support lever 5, which edge regions form a second partial stop 7' at the pivot point 3. The first and second restraining members 2A, 2B are correspondingly shaped in the edge region facing the pivot point 3 and correspondingly form a first partial stop 6'. On the other hand, the portion of the pivot point 3 protruding through the recess 4 is semicircular. When the support bar 5 is subjected to bending stresses in the first bending direction Z, an angular displacement of the first restraining member 2A relative to the second restraining member 2B via the pivot point 3 is not possible, because the first partial stop 6 'and the second partial stop 7', which extend approximately in a straight line, block the pivot joint. The constraint device 1 attached to the first end 8 and the second end 9 thus has a stiffening effect against bending stresses on the support bar 5 in the first bending direction Z. On the other hand, the joint formed by the first 2A, second 2B and pivot point 3 is able to move when a bending stress is applied in the second bending direction-Z. The first restraining member 2A is angularly displaced relative to the second restraining member 2B about the pivot point 3. In the process, the first partial stop 6 'moves away from the second partial stop 7' and, therefore, the straight edge regions of the pivot point are not parallel to one another to prevent the pivot point 3 from falling out when the support bar 5 is deflected in the second bending direction-Z. When subjected to bending stresses in the second bending direction-Z, the movable pivoting of the restriction device 1 has no significant effect on the bending behaviour on the support bar 5.

Fig. 13a shows a further exemplary embodiment of an ear elevator according to the invention in a side view. In fig. 13b, the middle section 11 of the support rod 5 is shown in detail in an enlarged perspective view. In this embodiment the pivot point 3 has a circular shape. The plate-shaped parts of the first 2A and second 2B restraining members each have a corresponding configuration in the shape of a circle segment to accommodate the pivot point 3. Two pins forming a first partial stop 6' are arranged on the plate-shaped parts of the first 2A and second 2B constraint members, the pins resting directly against the support bar 5. The underside of the support rod 5 facing the first partial stop 6 'thus forms a second partial stop 7'. Under a bending load on the support bar 5 in the first bending direction Z, the rotational joint formed by the first 2A and second 2B restraining members and the pivot point 3 cannot rotate, as this would require the plate-shaped parts of the first 2A and second 2B restraining members and the pivot point 3 to move further upwards through the recess 4. This is prevented by the first partial stop 6 ' in the form of a pin, which first partial stop 6 ' presses against the support rod 5 forming the second partial stop 7 '. This blocking of the pivot joint causes the restraint device 1 to have an enhancing effect on the bending stress of the support bar 5 in the first bending direction Z. On the other hand, when the support bar 5 is subjected to bending stress in the second bending direction-Z, the pivot joint formed by the first 2A, second 2B and pivot point 3 is able to rotate, wherein the plate-shaped parts of the first 2A and second 2B restraining members and the pivot point 3 are thus moved slightly downwards out of the recess 4 of the support bar 5, so that the first partial stop 6 'is moved away from the second partial stop 7'. The first restraining member 2A is thus angularly displaceable relative to the second restraining member 2B about the pivot point 2. Thus, the restraint device 1 has no effect on the bending behaviour of the support bar 5 when subjected to a bending load in the second bending direction-Z.

Fig. 14a shows a further embodiment of the ear elevator according to the invention in a side view. In fig. 14b, the middle part 11 of the support bar 5 is shown in a perspective view. The restriction device 1 is connected to the support rod 5a at its front end 8 by means of two fasteners 18. In the exemplary embodiment shown, the restriction device 1 is formed in two parts and comprises a first restriction member 2A and a second restriction member 2B. The attached front end 8 is arranged on the first restriction member 2A. In the exemplary embodiment, the second end 9 of the restriction device is also connected to the support rod 5 by a fastener 18. The second end 9 is located at the second restraining member 2B and is formed by a holder 14 for receiving a harvesting finger. The support bar 5 has a slot-shaped recess 4 in which a guide element 22 of the restriction device is guided. The first restraining member 2A is connected to the second restraining member 2B via a pivot point 3, which pivot point 3 also extends through the recess 4. The pivot point 3 is in particular a disc which is separated from the first 2A and second 2B restraining members by a slot 19. The pivot point 3 thus works in the manner of a hinge. The pivot point 3 is not connected to the first binding member 2A. The pivot point 3 is connected to the second restraining member 2B via a link 20 because the slot 19 does not extend into the area of the link 20. In the embodiment shown, there are also a plurality of first and second stops acting together to allow the support bar 5 to be stiffened by the constraint device 1 under bending stress in a first bending direction Z, rather than in the opposite second bending direction-Z. The plurality of spatially separated stops are indicated as first partial stop 6 'and second partial stop 7' as previously described. The first part stop 6' is arranged in the region of the slot 19, i.e. at the first restraining member 2A and at the pivot point 3. The first part-stops 6 'each abut against the second part-stop 7', so that they are also arranged in the region of the slot 19, i.e. at the pivot point 3 and at the second restraining member 2B, respectively. When a bending stress is applied to the support bar 5 in the first bending direction Z, the first partial stop 6 'presses against the second partial stop 7' and the restriction device 1 has a reinforcing effect. Conversely, when the support rod 5 is subjected to bending stresses in the second bending direction-Z, the first partial stop 6 'moves away from the second partial stop 7' and the second constraint member 2B rotates about the pivot point 3 and thus changes its angular position with respect to the first constraint member 2A, while the support rod 5 deflects in the second bending direction-Z. The restriction device 1 then has no or a much smaller reinforcing effect.

Fig. 15a shows a further embodiment of the ear elevator according to the invention in a side view. Fig. 15b shows the middle section 11 of the support bar 5 in a detail in an enlarged perspective view. In fig. 15c, the restriction device 1 is shown in perspective view, both separately and in separate parts. Fig. 15a, 15b and 15c will be described together. As can be seen most clearly in fig. 15c, the restriction device 1 is formed from four separate, unconnected parts, a first restriction member 2A, a two-part pivot point 3, and a second restriction member 2B. The first restriction member 2A comprises the first front end 8 of the restriction device 1 connected to the intermediate portion 11 of the support bar 5 by a fastener 18. The second restriction member 2B comprising the second rear end 9 of the restriction device 1 is also connected to the central portion 11 of the support rod 5 by fastening means 18. Further, the retainer 14 is arranged on the second binding member 2B. The two-part pivot point 3 is shown twice in fig. 15c, on the one hand together with the restraining members 2A and 2B as the restraining means 1 and, on the other hand, once disassembled into its two parts, which are referred to as the first pivot point part 3' and the second pivot point part 3 ". The two pivot point parts 3', 3 "together form a substantially circular pivot point 3. Both pivot point parts 3', 3 "have an edge bead 25, which each extends along part of the circumference of the edge. In the cross-section of the rim flange 25, the pivot point 3 has a greater thickness than its disc-shaped central area 26 surrounded by the rim flange 25. Furthermore, the rim flange 25 projects radially beyond the disc-shaped central region 26. The restriction device 1 forms a pivot joint wherein the disc shaped central region 26 of the pivot point 3 fits into the respective semi circular configurations of the first 2A and second 2B restriction members. In the assembled state, the protruding edge bead 25 thus covers the gap formed between the restraining members 2A, 2B and the central region 26 of the pivot point 3, which advantageously prevents dust or swarf from entering the gap. Further advantageously, the edge bead 25 forms a lateral guide for the pivot point 3 along the restriction members 2A, 2B, by means of which lateral guide the edge bead 25 connects the pivot point 3 in the second direction of extension Y in a form-fitting manner.

Thus, the first restraining member 2A is angularly displaceable relative to the second restraining member 2B via the pivot point 3. The plate-shaped parts of the first 2A and second 2B restraining members forming the joint and the central area 26 of the pivot point 3 have their main extension direction in a plane spanned by the first bending direction Z and the main extension direction X. The support bar 5, which extends perpendicularly thereto, comprises a slot-shaped recess 4 through which the first and second restraining members 2A, 2B and the central region 26 of the pivot point 3 each extend partially. On the other hand, the edge bead 25 extends in the second direction of extension Y such that it projects beyond the recess 4 and abuts against the support bar 5. For mounting the pivot point 3, it is formed in two parts in the embodiment shown.

In the exemplary embodiment, the first stop 6 of the constraint device 1 is divided into six first partial stops 6'. The second stop 7 is likewise divided into a plurality of second partial stops 7 ', wherein the respective first partial stops 6 ' cooperate with the second partial stops 7 ' to block the movement of the constraint device 1 with respect to the intermediate portion 11 under bending stress in the first bending direction Z. The pivot point 3 comprises four first part stops 6 'and a further first part stop 6' is located on each of the first and second restraining members 2A, 2B. A respective second partial stop 7' is formed at the edge of the disc-shaped central region 26 of the pivot point 3, which abuts against the first and second restraining members 2A, 2B. The first part stop 6 'on the pivot point 3 is formed by the two head ends (Kopfenden) of the edge bead 25 on each side of the first pivot point 3'. The edge flange 25 extends along part of the circumference of the edge of the first pivot point part 3 ' and in each case terminates in a head end at a distance from the diametrical line of the disk-shaped central region 26, wherein a total of four head ends bear against the first partial stop 6 ' of the underside of the support rod 5, on which the associated second partial stop 7 ' is formed. Under bending stress of the support bar 5 in the first bending direction Z, the first restraining member 2A cannot rotate about the pivot point relative to the second restraining member 2B because both the first and second restraining members 2A, 2B are connected to the support bar 5. To allow such angular displacement, the pivot point 3 and the plate-shaped part of the first 2A and second 2B restraining members will have to be moved further through the slot-shaped recess 4. However, this is prevented by the first part stop 6 ' on the pivot point 3, since the edge bead 25 forming the first part stop 6 ' on the first pivot point part 3 ' abuts the support bar 5 and thus prevents the pivot point 3 from moving further through the recess 4. For this reason, the restraint device 1 is effective to reinforce the bending moment in the first bending direction Z. The edge bead 25 on the second pivot part 3 "extends over a smaller part of the circumference of the edge than in the case of the first pivot part 3'. When the support bar 5 is subjected to a bending load in the second bending direction-Z, the first restraining member 2A is thus able to displace relative to the second restraining member 2B about the pivot point 3, as the pivot point 3 moves downwardly out of the recess 4 in the direction of the first bending direction Z. As it does so, the first part stop 6 'moves away from the second part stop 7' so that the restraining device 1 does not significantly affect the deflection of the support bar 5 in the second bending direction-Z. The surfaces of the semicircular recesses on the first and second restraining members 2A, 2B, which form the first part-stop 6' and are not shown here, are comparable to those of the embodiment shown in fig. 6 c.

Fig. 16a shows a further embodiment of the ear lift according to the invention in a perspective view. Fig. 16b shows the middle section 11 of the support rod 5 in an enlarged detail in side view. Fig. 16c and 16d show the middle section 11 of the support rod 5 in detail in two different perspective views. Fig. 16a, 16b, 16c and 16d are depicted together. In an embodiment, the restriction device 1 comprises a tension element 28. The restriction device 1 is attached to the intermediate portion 11 of the support bar 5 by the first end 8 by means of a rivet as fastener 18. The second end 9 of the restriction device 1 is fastened to the support bar 5 by means of a rivet as fastener 18. The central region 11 has a shaped portion 11 'which in the broadest sense can be described as U-shaped, wherein the tensioning element 28 spans the shaped portion 11'. The tensioning element 28 may be designed as a wire; which in the exemplary embodiment shown is a leaf spring. The tensioning element 28 is subjected to tensile stress under bending stress in the first bending direction Z and therefore has a reinforcing effect with respect to the bending stress of the intermediate portion 11. The reinforcing effect of the tensioning element 28 is greater in the first bending direction Z than in the second bending direction-Z with respect to the bending stress in the central part 11, since the tensile forces that can be transmitted via the tensioning element 28 are greater than the compression forces that can be absorbed by the spring leaf as tensioning element 28. If a compressive force is introduced into the tensioning element 28 via the fastening ends 8, 9, as is the case with a bending load in the second bending direction-Z, the spring plate bends and has only a slight or no stiffening effect, so that the support rod 5 can be bent flexibly upwards. Furthermore, as can be seen in fig. 16c and 16d, the fastening of the second end of the restriction device 1 can be achieved through elongated holes 27 in the tensioning element 28. As a result, when a bending stress is applied in the second bending direction-Z, the tensioning element 28 initially cannot practically absorb any compressive force, because the intermediate portion 11 with the fastening member 18 can be displaced along the elongated hole 27 of the restriction device 1. The spring plate is compressed as a tensioning device 28 only when the fastener 18 abuts under pressure against the distal end of the elongated hole 27.

Fig. 17a shows a further embodiment of the ear lift according to the invention in a perspective view. Fig. 17b shows the middle section 11 of the support bar 5 in an enlarged detail in side view. Fig. 17c and 17d show the middle section 11 of the support rod 5 in detail in two different perspective views. Fig. 17a, 17b, 17c and 17d are described together. In this embodiment, the restriction device 1 is provided with a pressure element 29. The pressure element 29 of the restriction device 1 is attached to the intermediate part 11 of the support rod 5 by the first end 8 by means of a rivet as fastener 18. The second end 9 of the pressure element 29 of the restriction device 1 is not connected to the support rod 5. The intermediate region 11 has a shaped portion 11 ', which in the broadest sense can be described as U-shaped, wherein the pressure element 28 bears with the second end 9 against the shaped portion 11 ' such that the first stop 6 is formed at the second end 9 and the second stop 7 is formed at the shaped portion 11 ' of the intermediate portion 11. Under bending stress in the first bending direction Z, the first stop 6 is pressed against the second stop 7 and the pressure element 29 is subjected to pressure, so that it therefore has a reinforcing effect with respect to the bending stress of the intermediate portion 11 in the first bending direction Z. The reinforcing effect of the pressure element 29 is greater with respect to the bending stresses in the intermediate portion 11 in the first bending direction Z, since the pressure element 29 can only absorb compressive forces, since the second end 9 is not attached to the support bar 5. When the intermediate portion 11 is subjected to bending stresses in the second bending direction-Z, it is thus free to move. Furthermore, the restriction device 1 may comprise a tensioning element 28, which can best be seen in fig. 17D. In this case, the restriction device 1 comprises two parts, wherein in this case the tension element 28 and the pressure element 29 each have a first end 8 and a second end 9. In all other respects, reference is made to the description of the exemplary embodiment according to fig. 16a, 16b, 16c and 16d with regard to the functional details of the tensioning element 28.

Reference numerals

1 restraining device

2 binding member

2A first restraining member

2B second binding member

3 pivot point

3' first pivoting part

3' second pivoting member

4 concave part

5 support rod

6 first stop part

6' first part stop

7 second stop

7' second part stop

8 first end of restraining device

9 second end of the restraining means

10 fastening part

11 middle part

11' middle part of the shaping part

12 sliding part

14 holder

15 harvesting finger

16 straw lifter

17 front end, end

18 fastener

19 slot

20 connecting piece

21 holes

22 guide element

23 is inserted into the opening

24 insert

25 edge flange

26 central region of disc shape

27 elongated hole

28 tensioning element

29 pressure element

Main direction of extension of X

Y second direction of extension

Z first direction of curvature

-Z second direction of bending