ES2393190T3 - Vineyard Post - Google Patents

Abstract

Post with at least one hook to hold a wire (8) in viticulture and fruit growing, which has a base body (2) with at least one wing (4) of sheet metal on which the hook (6) is produced from of the metal sheet by punching and bending a tongue-shaped section (12) that extends from a tongue base (10) to a free end, characterized in that the tongue-shaped section (12) is bent more than 90 ° backwards ( 16), starting from the tongue base (10) and moving away from the die opening (14), thus forming a receiving segment (18) of arched cross-section for the wire (8), so that at least a part of the segment of reception (18) and all of a guide segment (20) adjacent thereto, are located outside the die-cut opening (14) in front of a closed area of the outer surface of the wing (4), so that, in case if blows occur from outside, the outer surface serves as or a support surface that prevents the sinking of the hook (6) into the die opening (14).

Description

Vineyard Post

The invention relates to a vineyard post according to the preamble of claim 1.

For wire frames in viticulture and fruit growing, open or closed metal profiles are used that have external hooks configured on the wings by die-cutting, forming and bending of tabs of the base material.

For example, in documents DE 44 36 936 C2 (reinforced die hooks), DE 196 52 597 A1 (S-shaped hooks located at the height of the die cut), DE 196 29 023 C1 (S-shaped carved hook) and DE 299 11 927 U1 (inner hook) metal profiles of this type are disclosed, which are hereinafter referred to as vineyard posts.

The metal profiles described in the aforementioned documents present the problem that the metal tongues of the hooks are located above the die-cut opening and, when multipurpose combines are used, the striking rods can push them with a slight inclination towards the openings die-cutting, so that the wire can no longer be hung or can no longer be hung without the corresponding hook. In addition, the sliding surfaces formed on the hook for the wires inside the eyelets have die burrs due to the production technique, so that, in the case of blunt die cutting tools, the wire sliding is often very limited .

Document DE-A-35 22 140 describes a post-type support for nets, tarpaulins and sheets, which includes a bar that has hooks as sections in the form of tabs taped into the bar plate. Although the ends of the tongue-shaped notched sections are bent backwards from an opening of the sheet material located thereunder, the tongue-shaped sections extend above the die-cut opening and are bent backwards in the center area of the die cut opening. Therefore, in case of receiving blows from outside, the hooks can easily be pushed into the die openings. In addition, due to its conformation and flexibility, the post type support described is not suitable for use as a vineyard post.

Document FR-A-1 380 669 describes a stake with a circular cross-section, on whose outer surface flange hooks bent backwards are fixed by welding. Said document makes no reference to the possibility of producing the hooks from the material of the base body of the stake by die-cutting of tongue-shaped sections and bending them backwards.

Document DE-A-2 529 395 describes a strain bar having a base body with a V-shaped cross-section that, for fixing vine wires, has tongue-shaped sections separated from the wings of the base body . To fix the wire in the central area of the tongue-shaped section, the tongue-shaped sections are wound approximately helically around the wire some distance from the outer surface of the wing. In this case, the tongue-shaped section is not bent backwards, but the wire is held between the outer surface of the wing, which has burrs of cutting or cutting, and the tongue-shaped section. Furthermore, by means of the helical winding of the tongue-shaped section, no surface parallel to the outer surface of the wing is obtained to place or fix the wire.

Therefore, an objective of the present invention is to create a post of the type mentioned in the introduction and a method for producing it, the post being characterized in that, although multipurpose harvesters are used, the blows produced can no longer push the hooks inside the die holes, and in which the typical sliding and support surfaces for the wires are configured without annoying die burrs.

This objective is solved according to the invention by means of the characteristics indicated in claims 1 and 19.

The dependent claims describe other features.

A special advantage of the vineyard posts according to the invention is that the hooks can be easily rounded with moldings, so that the hooks not only obtain a defined edge of wire support or sliding surface, but also have a greater resistance . The vineyard posts according to the invention have the advantage that, since the die openings are located on the side of the outer surface of the wings opposite to the hooks, they cannot be knocked into said openings, so that the Hooks are multi-purpose harvester proof.

A saving of material is also achieved, and consequently a reduction in expenses, since through the folded back configuration of the hooks, these can be carried up to the upper edge of the profile head, which is subjected to a special request when the post is nailed or removed, without the die openings weakening the profile head. This allows the pole to be shortened by approximately 25 mm and in addition there are fewer problems with the so-called "on-line" devices during the placement of the post head.

In addition, the cutting burrs that are necessarily produced by punching the tongue-shaped sections are not found on the inner surface of the bent-shaped housing section or loop for the wire, but on the outer surface thereof, so that due to the thickness of the metal sheet there is a sufficient distance between the cutting burrs and the inserted wire, which effectively prevents the wires from deteriorating or jamming when removed.

Another advantage of the posts according to the invention is that all the support surfaces can be provided with moldings very easily, since the stamping tools can act in a concentrated manner on the central axis of the tongue-shaped sections, and have not of being taken to the outer cutting edges, which as a rule produces problems in relation to manufacturing tolerances in the case of reassembly, when it has to be resealed through the cutting hole or die hole.

Another advantage is that, in the case of an S-shaped hook configuration, the moldings naturally result in part from the direction of flexion of the material during the forming of the hook from the tongue-shaped section, whereby part of Manufacturing is greatly facilitated. In addition, the posts according to the invention offer the possibility of very selectively positioning the moldings to reinforce the hooks, which allows varying their elasticity from a very rigid configuration to a highly flexible configuration of the hooks or independent areas thereof.

Another advantage of manufacturing the post according to the invention is that the life of the cutting die for separating the tongue-shaped sections, which are then folded according to the invention in the desired hook shape, is very long, since it is not ejected laterally, but a roof-shaped notch can be used.

In particular, by bending the tongue-shaped sections backwards, that is, in the opposite direction to the die-cut opening, very large housing sections can be obtained in the form of a buttonhole or loop for the wires, which have a reinforced heel, especially when the moldings are stamped as central longitudinal moldings on the tongue-shaped sections before bending them.

Another advantage of the embodiment according to the invention is that the die-cut hole is largely free below the hook and is thus available for other applications, for example for plastic inserts or tweezers for retaining the wires. , which does not occur, for example, in the case of prior art hooks mentioned in the introduction, in which, as a rule, the die-cut openings are covered by the tongue-shaped sections.

A special advantage of the posts according to the invention, in particular with regard to a long service life of the wires, is that the molding that extends centrally well defined along the entire inner face of the section in tongue shape keeps the wire away from the outer surface of the corresponding wing in the area of the tongue base, because, due to the force of gravity, the wire slides slightly down on the molding that comes out of the base of the tongue, which is always placed at a distance from the outer surface of the pole wing. In this way, corrosion by contact with moisture or chemical substances, such as those included in spray insecticides for grapes, can be avoided from the beginning, since, unlike the current state of the art, between the outer surface of the The wing of the pole and the wire itself cannot accumulate any moisture such as can be observed frequently in the posts of the current state of the art due to the surface tension of the liquids. In addition, the wire is given a better sliding behavior, which considerably reduces the frequency of binding or blocking during removal.

In addition, the post according to the invention has the advantage that, unlike known hooks, in which the tongue-shaped section is disposed above the die-cut opening, a force acting laterally on the free hook end , such as that generated for example by the striking elements of a multi-purpose harvester, due to the configuration according to the invention does not lead to the application of a torque to the wing of the pole that must be compensated by the use of a support force raised through the base of the tongue, which can very easily lead to deformation and thereby cracks in the area of the tongue base. This is because the arcuate housing section itself can absorb the torque.

The invention is described below by means of preferred embodiments with reference to the drawings.

In the drawings:

Figure 1 shows a schematic three-dimensional representation of a vine post according to the invention;

Figure 2 shows a three-dimensional side view of a preferred configuration of an S-shaped hook;

Figure 3 shows a cross-sectional view of a hook according to the invention, in which the arched housing section for the wire, configured in a C-shape, is joined with an essentially rectilinear end section separated at an outward angle, which defines a wire placement opening;

Figure 4 shows another embodiment of the hook according to the invention, in which the C-shaped housing section is connected to an essentially rectilinear guide section, which extends towards the outside of the post wing;

Figure 5 shows another embodiment of the hook according to the invention, in which the arcuate housing section is connected with a rectilinear section that extends parallel to the outer surface of the pole wing and, joined therewith, an arcuate end section oriented towards the outer surface of the pole wing, resulting in a closed O-shaped eyelet;

Figure 6 shows another embodiment of the hook shown in Figure 5, in which the end of the curved end section is disposed in a recess formed on the outer surface of the post wing;

Figures 7a, 7b show another embodiment of the invention, in which the hook is configured as a double hook;

Figures 8a, 8b show another embodiment of a double hook, in which the end edges of the rectilinear section extend parallel at an angle to each other in order to prevent the wire from coming out if it is subjected to tensile stress. side;

Figure 9a shows a schematic side view of a first step of the process for the production of a post according to the invention, in which, in a combined die-cutting and stamping process, the tongue-shaped section is punched into the post wing and at the same time it is provided with a stamping in the form of a molding and an angled end, which in the finished final product defines a growing placement opening for the wire;

Figure 9b shows a top view of the tongue-shaped section stamped in the step of the procedure shown in Figure 9a;

Figure 10 shows another step of the process for the production of the hook according to the invention, in which the tab-shaped section previously stamped and angled is folded by means of a stamping die introduced from below, so that it acquires a position in which extends essentially perpendicular to the outer surface of the pole wing;

Figure 11 shows another step of the process, in which the tongue-shaped section is bent from the position shown in Figure 10 so that it acquires the definitive S-shape by another stamping tool, moved in a direction parallel to the outer surface of the pole wing, and a stamping die disposed on the other side of the tongue-shaped section;

Figure 12 shows a cross-sectional view through the tongue-shaped section to clearly illustrate the convex bulge formed in the inner area of the arcuate housing section with a wire schematically represented; Y

Figure 13 shows another embodiment of the hook according to the invention, in which the C-shaped housing section is joined with an essentially rectilinear guide section and an end section presenting a plate-shaped or convex-shaped bucket towards the outer surface of the wing.

As Figure 1 shows, a vineyard post 1 according to the invention includes a base body 2 formed of metal sheet, in particular steel sheet, which has an essentially U-shaped cross section with wings 4, in which they are shaped the hooks 6 according to the invention, for the accommodation of wires for vines 8.

The hooks 6 are produced, according to the representation of Figure 2, by punching and bending a tongue-shaped section 12 of the metal sheet extending from a tongue base 10 to a free end.

As can also be seen in detail in the representation of Figure 2, the tongue-shaped section has a housing receiving segment 18 that is bent at least 90 ° backwards in the direction indicated by arrow 16 from the die-cut opening. formed 14 and which, in the embodiment of the invention shown in Figure 2, is essentially C-shaped and is indicated by dashed lines.

As Figure 2 and the corresponding cross-sectional representation of Figure 4 show, the arcuate housing section 18, which preferably has a C-shape but can also be U-shaped or in another arched shape, is joined with a section guide 20 essentially rectilinear, which in the embodiment of the invention shown in Figures 2 and 4 preferably extends at an acute angle in the direction of the outer surface of the wing 4, but which according to the configuration of Figures 5 and 6 can be also arranged in a plane that extends essentially parallel to the outer surface of the wing 4 if a closed eyelet is desired for the accommodation of the wire 8.

A very important feature in this context is that, except for a partial area of section 18 conditioned by the thickness of the curvature thereof, both section 18 at least partially and the complete guide section 20 attached thereto are arranged outside the die-cut opening 14 over a closed area of the outer surface of the wing 4, so that, in case of blows from outside, the outer surface serves as a support surface that prevents the sinking of the hooks, in particular towards the inside the die opening 14.

According to the representation of Figure 3, a final section 22 may be directly connected with the arcuate section 18 or with the rectilinear section 20 of the hook 6, final section 22 which preferably also has a rectilinear configuration and moves away from the outer surface of the wing 4, for example at an angle of 45 ° with respect to this, to define an increasing placement opening 24 for the wire 8.

The tongue-shaped section or the arcuate housing section 18 is preferably oriented such that it extends along an imaginary plane parallel to the longitudinal axis of the post and preferably perpendicular to the outer surface of the corresponding wing 4, preferably extending also in this plane the guide section 20 and / or the final section 22.

In accordance with the embodiment of the invention shown in Figures 5 and 6, there is also the possibility that the rectilinear section 20, which in this case preferably extends in a direction parallel to the outer surface of the wing 4, instead of be connected with the end section 22 facing outwardly be joined with an arcuate end section 26 whose free end, as shown in Figure 5, is supported with the outer face on the outer surface of the wing 4 or, according to the embodiment of Figure 6 is preferably housed in a recess 28 formed on the outer surface or on the wing 4 material.

According to another configuration of the invention, to form a double hook 30 shown in Figures 7a to 8b, a first hook 6a and another hook 6b symmetrically configured with respect to the first are arranged together at a short distance from each other, the ends being located free of the essentially rectilinear guide sections 20a and 20b of the corresponding hooks facing each other at a distance d, forming a gap 38 that is equal to or slightly larger than the diameter of a wire 8. Also in this case, the hooks 6a and 6b of the double hook 30, symmetrically configured with each other, are produced by punching corresponding tongue-shaped sections 14a, 14b and bending them from the corresponding tongue base 10a or 10b backwards, one towards the other, being configured preferably the arcuate housing sections leaving the respective tongue bases 10a, 10b essentially C-shaped in the case of the embodiment according to Figures 7a to 8b.

In the embodiment of the invention shown in Figures 8a and 8b, the gap 38 extending between the final sections of the rectilinear sections 20a, 20b is oriented at an angle of for example 45 ° with respect to the central plane 36 of the hook corresponding double 30, so that, before placing the wire, it has to be rotated with respect to the horizontal until said angle is formed to be able to introduce it into the housing area through the formed gap 38.

As Figure 12 shows, the tongue-shaped section 12 has a convex bulge 40 in the area of the arcuate housing section 18 which is located in the inner area of the eyelet-shaped housing area, in which the wire 8 passes through the hook 6, and which extends from the center of the tongue-shaped section 12, preferably symmetrically, for example by way of a saddle or a molding, towards the edges of the shaped section of tongue 12. The convex bulge 40 defines a convex support surface 42 extending in the area of the central middle plane of the hook 6 along the arcuate housing section 18, or preferably also along the essentially rectilinear section 20 and of the final sections 22 and 26 of the embodiments described above. The wire 8 can slide along the support surface 42 with little friction and without danger of protruding burrs.

As shown in Figure 13, it can be provided that the rectilinear end section 22 extends essentially parallel to the outer surface 4 or away from it with a slight inclination, and that the convex bulge oriented towards the outer surface of the wing 4 is configured as a plate-shaped concavity 40a made by a suitable stamping tool, preferably in the final section 22, other moldings being made as additional reinforcement preferably in the housing section 18 and / or in the guide section

twenty.

The concavity in the form of a plate or spoon 40a has a depth of 0.5 to 3 mm, for example. If so desired, the final section 22 may be enlarged circularly or elliptically with respect to the guide section 20 to obtain a greater distance at the edges with respect to the outer surface of the wings 4 and to facilitate the placement of the wire 8 In this context, the bulging is preferably carried out in a central position in the final section 22 enlarged in particular in circular or elliptical form, such that the distance between the outer surface of the wing 4 and the face of the concavity in the form of plate 40a oriented towards the outer surface, distance defining the placement opening 24, corresponds to the range of the wire diameter, for example in the range of 0.5 to 3 mm.

The embodiment of the invention described above has the advantage that the beaters of the multi-purpose harvesters are only subjected to very small loads, since no hook points protrude and the beaters only strike on flat surfaces with rounded edges, especially when the sharp outer cutting edges flatten under pressure during stamping (as in the case of the preferred embodiment).

Another advantage is that there is a very stable plate stamping from a mechanical point of view, which with the materials and thicknesses of materials normally used is not deformable by the beaters of the multipurpose combines and therefore cannot be closed by the combined harvester strokes, unlike what happens in the case of tongue-shaped hooks without conventionally shaped reinforcements. In addition, the plate-shaped geometry of the concavities 40a can be obtained and maintained very accurately easily and without excessive wear of the tool during deep drawing of the hooks.

Another advantage of the embodiment described above is that the plate-shaped concavity 40a also reinforces at the same time the rest of the tongue-shaped section 12, whereby it also becomes more resistant to deformations, and sometimes Molding-shaped bulges or additional cavities can be dispensed with to reinforce the tongue-shaped section 12, which reduces tool costs and accelerates the production process.

Finally, when the wire 8 is introduced, it slides exclusively on spokes and not on edges, which results in stable sliding conditions, since the wire does not engage in cutting burrs. Thanks to this, defined forces of introduction and laying of the wires are obtained in particular, and in addition plastic wires, or plastic-coated wire, which otherwise easily deteriorate due to sharp burrs / sharp edges can be used.

In order to produce the post according to the invention, the base body 2 is folded in a known manner in the manner shown in Figure 1 from a strip-shaped metal sheet with a corresponding width and, if necessary, provided with previous die-cuttings. , and then configured in the corresponding manner by means of a punching and stamping tool 62 inserted from the inner part 60, which cooperates with a die-cutting and stamping die 64 arranged on the outside of the wing 4.

To produce the configuration of the hook 6 shown in Figures 2 and 4, the final section 22, which in the finished post 1 extends in the opposite direction to the outer surface of the wing 4, is already stamped with the die-cutting process in the section in the form of a tongue 12, as shown in Figure 9a, also also simultaneously stamping the convex bulge 40 shown in Figure 12 in the tongue-shaped section 12, preferably along the entire length thereof from the tongue base 10 In Figure 9a, the convex bulge 40 is located on the upper face of the tongue-shaped section 12.

In the next procedure step, a second stamping die 70 is introduced from below through the die opening 14 and the arcuate shape is stamped on the tongue-shaped section 12 to form the arcuate housing section 18, for which the tongue-shaped section 12 preferably bends in approximately perpendicular direction upwards, as shown in Figure 10.

In the next and last step of the process, a third stamping tool 72 moves in a plane that extends essentially parallel to the outer surface of the wing 4, in the direction of the arrow 74 shown in Figure 11, against the section in tongue shape 12 which extends perpendicularly away from the outer surface, and at the same time, by another stamping die 76 having a tip 78 configured correspondingly to the arcuate shape of the arcuate housing section 18, a counterpressure is generated that forces the hook 6 to its final form.

If desired, the end of the tongue 22 can be re-stamped separately by another stamping tool, not shown in the figures.

Simultaneously and / or in addition to the stamping process, the outer edges of the tongue-shaped section 12 that have cutting burrs can be subjected to resurfacing to eliminate the cutting burrs from the beginning. This can be done for example by chamfering the edges of the outer contours.

Claims (25)

1. Post with at least one hook to hold a wire (8) in viticulture and fruit growing, which has a base body (2) with at least one wing (4) of sheet metal on which the hook is produced (6 ) from the sheet metal by punching and bending a tongue-shaped section (12) extending from a tongue base (10) to a free end,  characterized because the tongue-shaped section (12) is bent more than 90 ° backwards (16), starting from the tongue base (10) and moving away from the die-cut opening (14), thus forming a receiving segment (18 ) of arched cross-section for the wire (8), so that at least a part of the receiving segment (18) and the whole of a guide segment (20) adjacent to it, are outside the die-cut opening ( 14) facing a closed area of the outer surface of the wing (4), so that, in case of blows from outside, the outer surface serves as a support surface that prevents the sinking of the hook (6) into the interior of the die cut opening (14).

2.

Post according to claim 1, characterized in that the arched receiving segment (18) has an essentially shaped cross section

of C.

3.

Post according to claim 2, characterized in that an essentially rectilinear guide segment (20) is adjacent to the receiving segment

arched (18)

Four.

Post according to claim 3, characterized in that the rectilinear guide segment (20) extends from the end of the receiving segment (18)

towards the outer surface of the wing (4).

5.

Post according to claim 3 or 4,

 characterized because adjacent to the arched reception segment (18) and / or the rectilinear guide segment (20) there is an essentially rectilinear final segment (22) that extends parallel to the outer surface or that moves away from the outer surface of the wing (4 ), said segment defining, with the outer surface of the wing (4) an insertion opening (24) that widens for the thread (8).

6.

Post according to claim 3 or 4, characterized in that an arcuate end segment (26) directed towards the outer surface of the wing (4) is adjacent to the

angled reception segment (18) and / or the rectilinear guide segment (20).

7.

Post according to claim 6, characterized in that the end of the arcuate end segment (26) is arranged at a short distance from the surface

outside of the wing (4) or is supported by it.

8.

Post according to claim 7, characterized in that the end of the arcuate end segment (26) is housed in a concavity (28) configured in the

outer surface of the wing (4).

9.

Post according to claim 3,

 characterized because the essentially rectilinear guide segment (20) extends in a plane essentially parallel to the outer surface of the wing (4). 10. Post according to claim 9,  characterized because on the outer surface of the wing (4) another hook (6d) symmetrical to the hook (6a) is formed to configure a double hook (30), the free ends of the essentially rectilinear guide segments (20a, 20b) being located one facing each other in the plane that extends essentially parallel to the outer surface of the wing (4), and existing between the tongue base (10a) of the hook (6a) and the tongue base (10b) of the other hook (6b) a distance (d) that is greater than twice the length of the rectilinear guide segments (20a, 20b). 11. Post according to claim 10,  characterized because the edges of the ends of the essentially rectilinear guide segments (20a, 20b) of the hook (6a) and of the other hook (6b) extend parallel to each other at a distance (d) greater than the diameter of the wire (8) . 12. Post according to claim 11,  characterized because the edges of the ends of the essentially rectilinear guide segments (20a, 20b) are arranged at an angle with respect to an imaginary joint line (36) between the tongue base (10a) of the hook (6a) and the base of the tongue (10b) of the other hook (6b). 13. Post according to one of the preceding claims,  characterized because the arched cross-section receiving segment (18) is provided with a convex bulge (40) in the inner part, which defines for the wire (8) an inner bearing surface (42) extending from the tongue base (10)

14.

Post according to one of claims 3 to 13, characterized in that the essentially rectilinear guide segment (18) is provided with a convex bulge (40)

oriented towards the outer surface of the wing (4).

fifteen.

Post according to claim 5, characterized in that the rectilinear end segment (22) is provided with a convex bulge (40) oriented towards the

outer surface of the wing (4).

16.

Post according to claim 15, characterized in that the convex bulge is configured as a plate-shaped concavity (40a) located

in the final segment (22).

17.

Post according to claim 6, characterized in that the arcuate end segment is provided with a convex bulge oriented towards the

outer surface of the wing.

18.

Post according to one of claims 13 to 17,

 characterized because the bulging is done during the punching of the tongue-shaped section by means of a stamping tool that acts centrally on it. 19. Method for producing a post according to one of the preceding claims, characterized by the following procedural steps:

-

bending an essentially flat metal sheet to form a base body (2) having a wing (4),

-

punching of a tongue-shaped section (12) by a first die cutting tool

(62) from the inside (60) of the base body (2), and

-

backward bending (16) in at least 90 ° of the tongue-shaped section (12) obtained from the die-cut opening (14) from the tongue base (10) of the tongue-shaped section (12).

twenty.

Method according to claim 19, characterized in that, during punching, the tongue-shaped section (12) is provided with a convex molding in

the outer part of the wing (4).

twenty-one.

Method according to claim 20,

 characterized because, an end segment (22) glued, essentially rectilinear, is obtained by drawing the tongue-shaped segment (12), simultaneously to the die cut through the die opening (14), said end segment extending angularly with respect to to the outer surface of the wing (4) after punching and drawing. 22. Method according to one of claims 19 to 21,  characterized because the tongue-shaped section (12) bends around a stamping die (76) arranged on the outer surface of the wing (4) with a tip (78) adapted to the arc shape of the arched housing section (18) ). 23. Method according to one of claims 19 to 22,  characterized because the bending of the tongue-shaped section (12) is carried out by means of a rotating tool that acts on the tongue-shaped section (12) from the inner part (60) of the wing (4) through the opening die cutting (14). 24. Method according to one of claims 19 to 22,  characterized because the bending of the tongue-shaped section (12) is carried out by means of several stamping tools (70, 72, 76) that act successively in a direction perpendicular to the outer surface of the wing (4) and in a parallel direction to the same. 25. Method according to one of claims 19 to 24, characterized in that, after punching, the outer edges of the tongue-shaped section (12) which they have burrs of cutting flatten under pressure, in particular they are chamfered.