Support rod variants with wedge tip for attaching growth protection covers to the ground

Abstract

Device holding rod variant with wedge tip for fastening growth protection covers to the ground, characterized in that an earth rod 1 made of any material, preferably wood, is provided with a wedge tip 2-4 for driving into the ground and has any desired slenderness ratio a of the wedge tip 2-4, furthermore has a rectangular rod cross-section xy, and optionally has a machined gap 12 dividing the rod in the middle, in which objects can be received or clamped F7 and the divided impact surface 9 of the web 9 lying above the wedge tip 4 is offset in height by the dimension L4 minus L6 relative to the web 10 in order to introduce the introduced impact effect F1 into the wedge tip 4 solely through the rod web 9 without force deflection.

Description

[0001] In the forestry and agricultural sectors, so-called growth protection covers are well known for protecting against damage caused by wildlife. These are all designed as round tubes, triangular, or polygonal shapes, and are available in all imaginable sizes and materials. All of these growth protection covers serve the purpose of protecting and enveloping the plant for at least three to eight years, preventing wildlife from damaging it through browsing or raking.

[0002] However, for secure and stable support, these growth protection covers must be secured to the ground with a wooden, plastic, or metal support rod. To do this, such a support rod is driven into the soil with hammer blows and then firmly attached to the growth protection cover using cable ties, wire, tape, nails, or a stapler.

[0003] All support rods have a standard point in the shape of a prism or a cone so that they can be driven into the ground.

[0004] The device according to the invention comprises support rods 1 in various design variants 1, 7, 8, 11, with a wedge-shaped point 2, as this represents the most effective point variant, tried and tested in practice and mathematically proven, for a rod 1 or earth stake 1 that can be most easily driven into any soil formation.

[0005] Contrary to all the points used on wooden poles or posts, the pure wedge shape 2, 4 represents the most effective point shape and, despite all these findings, is not and has not been used to date, because a prism point 5 or conical point 6 is easier and faster to manufacture, or supposedly prevents lateral deflection when driving into the ground. This assumption has not been proven to date.

[0006] For manufacturing reasons, a relatively blunt, i.e. large, tip angle a was always used, and thus a favorable and effective input angle was not achieved.

[0007] Another inventive idea lies in the shape of the bars, which until now have all been square x=y in cross-section, whereas a rectangular shape xy has been proven to result in significantly higher fracture and bending stiffness across the longer rectangular x side. This higher lateral strength enables the targeted use of the bar to absorb and withstand forces occurring at one side.

[0008] Also new in the invention is the use of rods 1 which are split 11 in the middle or on one side and have a central gap 12 into which components such as growth protection covers or other objects to be held can be received and clamped F7 in order to then be firmly attached to the ground together with the rod.

[0009] It is very beneficial for driving into the soil if the rod has, as already stated, a slender wedge tip 2, 4 and, in addition, a protruding, offset impact surface 9 at the upper end (i.e. the web of the split rod running above the wedge tip is longer and protrudes beyond the remaining opposite web) which protrudes beyond the other rod flank 10. Thus, when hammer blows F1 are applied to the soil, only the protruding web 9 transfers the impact energy F1 of the hammer into the rod 1. This ensures the direct flow of force F1 of the hammer blows F1 without deflection from the impact surface 9 to the wedge tip F1 of the rod. This means that the load is completely relieved by hammer blows F1 from the web 10 and that part of the energy F1 is redirected at the lower end of the rod 1.

[0010] The inventive idea of ​​the device when using so-called holding rods 1, 11 for growth protection covers which are attached to the ground with a wooden rod 1 and have a wedge tip 4 for easier driving into the ground, as well as generally having an advantageous rectangular rod cross-section x=y and optionally having a gap 12 in the middle for receiving and holding other objects.

[0011] The further inventive concept lies in the offset of the recessed impact surface 9 at the upper end of the rod 11 for the one-sided introduction of the impact energy F1 through only the rod web 9, which leads directly to the cone tip 4. The individual variants used, or the combination of these designs, as well as the properties, comprise the inventive novelty.

[0012] By using the inventive design of the named rod variants 1,7,8,11 and tip designs 2,3,4,5,6, the advantageous impact energy distribution F1 of the impacted rod surface 1.1 through F1 and the then in the tip splitting force F1-1, F1-2, F1-3 and the splitting and wedge force F2-2 and F2-3 as well as the tip and wedge forces F1-1, F2-2 reducing friction forces F3, F4, F5

[0013] The comparison of the force or energy flows shows that F2-2 is smaller than F1 and F1-1 and represents only a partial amount of F1. It is also advantageous that F2-2 is significantly larger than F2-3 at wedge tip 2, and the energy-reducing friction forces F3 and F4 are significantly smaller than the friction force F5 at the double wedge tip 3, whereby at wedge tip 2, the friction force F3 approaches zero towards the vertical side of wedge tip 2.

[0014] Independently of this consideration, the consideration of forces can be mathematically verified and demonstrated and can be easily presented in practice.

[0015] The dimensional representations such as L1 + L2 and L3 for the total length of bar 11 and XY for the bar cross-sectional dimension, and subsequently for the projecting longer bar web 9-L4 compared to the recessed and shorter bar web 10-L4 as well as the wedge tip length 4-L5. The web thicknesses are specified in dimensions 9-10-L8, and the gap width and length are defined by dimensions L7-L9.

[0016] The square cross-sections of the standard support rods 7-8 with prism tip 5 and their tip length L12 as well as the tip length L12 of the conical tip 6 are thus shown and specified.

[0017] The solution to the problem according to the invention results from the features of claim 1 in conjunction with the features of the preamble.

[0018] Further advantageous embodiments and applications of the invention emerge from the subclaims.

[0019] In addition to the description, sketch 1 to sketch 6 illustrates the design and application of a single fastening element 5-8 with vertically guided support posts 5 and integrated combination support 13,14,8 Sketch 1

[0020] Holding rod 1 with wedge tip 2 and representation of the effect of the hammer blow F1 with the corresponding force distribution into the peak force F1-1, the explosive force F2-2 and the friction forces F3 and F4 Sketch 2

[0021] Holding rod 1 with prism tip 3 and representation of the effect of the hammer blow F1 with the corresponding force distribution into the peak force F1-2, the explosive forces F2-3 and the friction forces F5 Sketch 3

[0022] Holding rod 1 with rectangular cross-section xy and a wedge tip 4 with continuous force curve F1 and direct force introduction F6 into the tip force F1-1, into the wedge force F2-2 with division into the friction forces F2-2 and F3 due to the wedge angle a. Sketch 4

[0023] Holding rod variant 11 divided by a gap 12 with the one-sided force flow and energy flow F1 only continuously through the loaded web 8 directly into the wedge tip 4 under deflection of the key force F2-2 without the web 10 being subjected to any force or load Sketch 5

[0024] Holding rod 7 with a classic prism tip 5 and the classic square cross-section variant L10 equal to L10 with prism tip and the disadvantageous and force-destroying force distribution from the impact energy F1 into a low peak force F1-3 four times into a low explosive force F2-3 and the braking four times occurring friction force F5 Sketch 6

[0025] Holding rod 8 with a classic conical tip 6 and the classic conical cross-section variant L10 equal to L12 with a conical tip and the disadvantageous and force-destroying force distribution of the impact energy F1 into a low peak force F1-4, an all-round occurring low explosive force F2-3 and the also all-round braking friction force F5

Claims

[1] Device holding rod variant with wedge tip for attaching growth protection covers to the ground, characterized by that an earth rod 1 made of any material, preferably wood, is provided with a wedge tip 2-4 for driving into the ground and has any desired slenderness ratio a of the wedge tip 2-4, furthermore has a rectangular rod cross-section xy, and optionally has a slot 12 dividing the rod in the middle, into which objects can be picked up or clamped F7, and the divided impact surface 9 of the web 9 lying above the wedge tip 4 is offset in height by the dimension L4 minus L6 to the web 10 in order to introduce the introduced impact effect F1 into the wedge tip 4 solely through the rod web 9 without force deflection. [2] Device holding rod variant with wedge tip for attaching growth protection covers to the soil, according to claim 1 characterized bythat the slenderness ratio a of the wedge tip 4 depends on the dimension of the rod cross-sectional size xy and thus different wedge angles a can be achieved to optimize the penetration properties into the soil and also the lateral explosive force F2-2 can be optimized so that the driving energy F1 for the rod can be carried out with minimal impact energy F1. [3] Device holding rod variant with wedge tip for attaching growth protection covers to the soil, according to claim 1 and 2 characterized by that the rectangular shape xy of the rod 1 in the cross section can be adapted to the requirement and the intended application and is always selected so that the applied impact energy F1 for driving into the ground can be introduced through the rod 1 into the ground without damage to the rod and in addition the rectangular cross section xy results in a significantly increased lateral bending stiffness over the wider side x. [4] Device holding rod variant with wedge tip for attaching growth protection covers to the soil, according to the preceding claims characterized by that the optionally incorporated gap 12 in the wider rectangular side x of the bar 11 divides the bar 1 into webs 9-10 of equal strength with the same dimensions L8 and thus withstands the intended and occurring requirements as well as the generated impact F1.

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