NAIL, IN PARTICULAR FOR USE IN A NAIL SETTING DEVICE

Abstract

Nail, in particular for use in a nail setting device, of an exclusively or predominantly ligno-cellulosic material and has a nail shaft (2) defining a nail axis (X), a nail tip (3) arranged at the front end of the nail shaft (2) and a nail head (4) arranged at the rear end of the nail shaft (2) and designed to be broader than the nail shaft (2), wherein the nail shank (2), the nail tip (3) and the nail head (4) have a circular cross-section, and wherein the nail shank (2) and the nail head (4) are connected by a transition region (5) which widens towards the nail head (4) and whose annular outer surface is curved concavely towards the nail axis (X).

Claims

1. Nail, in particular for use in a nail setting device, of an exclusively or predominantly lignocellulosic material and has a nail shaft (2) defining a nail axis (X), a nail tip (3) arranged at the front end of the nail shaft (2) and a nail head (4) arranged at the rear end of the nail shaft (2) and designed to be broader than the nail shaft (2), wherein the nail shank (2), the nail tip (3) and the nail head (4) have a circular cross-section, and wherein the nail shank (2) and the nail head (4) are connected by a transition region (5) which widens towards the nail head (4) and whose annular outer surface is curved concavely towards the nail axis (X).

2. Nail according to claim 1, wherein the outer surface of the transition region (5) is formed in the shape of a section of a circular arc in cross-section and extends in particular over a circumferential angle of 90°, the outer surface having in particular a radius of curvature (R) which is 0.3 mm, preferably 0.6 mm, and particularly preferably 0.8 mm.

3. Nail according to claim 1, wherein the transition region (5) begins directly at the front end face, in particular the front outer circumferential edge of the nail head (4) and/or merges continuously into the nail shank (2).

4. Nail according to claim 1, wherein the nail head (4) has a diameter (D.sub.K) of at least 5 mm and/or of at most 7.0 mm and the diameter (D.sub.K) is preferably 6.3 mm±0.3 mm and/or wherein the diameter (D.sub.K) of the nail head (4) is by 25% to 40%, in particular by 34±1% larger than the diameter of an axially rear end section (2a) of the nail shaft (2) adjoining the transition region (5) and/or the total length of the nail head is ≥1.5 mm and/or ≤4.5 mm and in particular is 3 mm to 3.2 mm.

5. Nail according to claim 1, wherein the nail has an overall length of at least 50 mm and/or of at most 90 mm, in particular of at most 80 mm and especially preferably of at most 70 mm, and the overall length is preferably 58 mm, and/or in that the point angle (α) of the nail point (3) is in the range from 60 to 120° and in particular is 90°±3°.

6. Nail according to claim 1, wherein an axially rear end section (2a) of the nail shank (2) adjoining the transition region (5) has a constant diameter (Ds) which is in particular at least 3.5 mm and/or at most 5.5 mm and preferably 4.7 mm.

7. Nail according to claim 1, wherein the nail shank (2) has a constant circular cross-section over its entire length.

8. Nail according to claim 6, wherein the nail shank (5) has an axial shank section (2b) adjoining the axially rear end section (2a), on which anchoring structures (6) are formed which each have a structure section (6a) tapering conically towards the nail tip (3), the anchoring structures (6) preferably being formed in the same way.

9. Nail according to claim 8, wherein the anchoring structures have a maximum structure diameter (D.sub.1) which is larger, in particular by at least 1.5% and/or by a maximum of 3% larger, preferably by 2 to 2.2% larger, than the shank diameter (D.sub.S) of the axially rear end portion (2a) of the nail shank (2) which adjoins the transition region (5), the maximum structure diameter (D.sub.1) being in particular 4.8 mm.

10. Nail according to claim 8, wherein the anchoring structures (6) have a minimum structure diameter (D.sub.2) which is smaller, in particular smaller by at least 8% and/or at most 12%, preferably smaller by 8.3 to 8.7%, than the shank diameter (D.sub.S) of the axially rear end portion (2a) of the nail shank (2) which adjoins the transition region (5), the minimum shank diameter (D.sub.2) preferably being 4.3 mm.

11. Nail according to claim 9, wherein the maximum structure diameter (D1) is present at the rear end of the conically tapering structure sections (6a) facing the nail head (2) and the minimum structure diameter (D.sub.2) is present at the front ends thereof.

12. Nail according to claim 11, wherein the anchoring structures (6) each have a two-stage transition section (6b) lying in the longitudinal direction behind the conically tapering structure sections, the first, rear transition stage of which has a circular-segment-like cross-section and the second, front transition stage of which has a circular-segment-like cross-section, the radius of curvature (K.sub.2) of the second transition stage being greater than the radius of curvature (K.sub.1) of the first transition stage, the radius of curvature (K.sub.1) of the first transition stage being in particular 0.2 mm and the radius of curvature (K.sub.2) of the second transition stage being in particular 0.25 mm, and/or wherein the total length of the anchoring structures (6) with the conically tapering structure section (6a) and the transition section (6b) is at least 2 mm and/or at most 2.3 mm and in particular the anchoring structures (6) have an overall length of 2.1 mm, and/or that between the axial shank portion (2b), on which the anchoring structures (6) are formed, and the nail tip (3) a front end portion (2c) of the nail shank (2) with a constant diameter corresponding to the diameter of the rear axial end portion (2a) is provided, wherein in particular the axial length of the front axial end portion (2a) is between 0.5 and 1.5 mm and is preferably 1 mm.

13. Nail according to claim 1, wherein the nail is made of wood and/or a wood material, in particular an organically bonded wood material, preferably a synthetic resin-bonded laminated wood or a synthetic resin-bonded fiber composite material containing lignocellulosic fiber, wherein the organically bonded material contains in particular melamine or phenolic resin as synthetic resin and/or the organically bonded wood material contains synthetic resin in particular in an amount of at least 10% by weight, in particular of at least 15% by weight, the synthetic resin content preferably being 20% by weight, and/or wherein the nail consists of a material having a density greater than 0.65 g/cm.sup.3, in particular a density greater than 0.85 g/cm.sup.3, preferably a density greater than 1.0 g/cm.sup.3 or a density greater than 1.1 g/cm.sup.3.

14. Nail strip comprising a plurality of nails according to claim 1.

15. Use of a nail according to claim 1 for fastening facade boards to a substructure.

16. Nail according to claim 2, wherein the transition region (5) begins directly at the front end face, in particular the front outer circumferential edge of the nail head (4) and/or merges continuously into the nail shank (2).

17. Nail according to claim 2, wherein the nail shank (2) has a constant circular cross-section over its entire length.

18. Nail according to claim 3, wherein the nail shank (2) has a constant circular cross-section over its entire length.

19. Nail according to claim 4, wherein the nail shank (2) has a constant circular cross-section over its entire length.

20. Nail according to claim 5, wherein the nail shank (2) has a constant circular cross-section over its entire length.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Further features and advantages of the invention are described on the basis of the following description of two embodiments of nails according to the invention with reference to the accompanying drawing. The drawing shows

[0031] FIG. 1 a front view of a nail according to one embodiment of the present invention;

[0032] FIG. 2 is a magnified view of detail II of FIG. 1;

[0033] FIG. 3 a plan view of the nail of FIG. 1;

[0034] FIG. 4 a perspective view of a nail according to a further embodiment of the present invention;

[0035] FIG. 5 a front view of the nail shown in FIG. 4;

[0036] FIG. 6 is a magnified view of section VI of FIG. 5;

[0037] FIG. 7 is a magnified view of section VII of FIG. 5; and

[0038] FIG. 8 the nail of FIG. 5 in plan view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0039] FIGS. 1 to 3 and 4 to 8 show two embodiments of a nail 1 of the present invention. The nail 1 consists of a predominantly lignocellulosic material having a density greater than 1.1 g/cm.sup.3. In the present case, the lignocellulosic material is an organically bonded wood material in the form of a synthetic resin-bonded, laminated wood which has a plurality of layers. Alternatively, the lignocellulosic material may also be a synthetic resin-bonded fiber composite material containing lignocellulosic fibers. In this embodiment, the organically bonded wood-based material contains synthetic resin in an amount of more than 15% by weight. In the present embodiment, the synthetic resin content is about 20% by weight.

[0040] The nail 1 comprises a nail shank 2 defining a nail axis X, a nail tip 3 arranged at the front end of the nail shank 2 and a nail head 4 arranged at the rear end of the nail shank 2 and widened relative thereto, wherein a transition region 5 widening towards the nail shank 2 extends between the nail shank 2 and the nail head 4. The nail shaft 2, the nail tip 3, the nail head 4 and the transition area 5 each have a circular cross-section.

[0041] The nail tip 3 is conical in shape and has a tip angle a that lies in the range of 60° and 120° and is 90°±3° in the embodiment shown. Alternatively, a ballistic nail tip 3 could be provided, the tip angle of which is measured between the front end of the nail tip 3 and the rear end of the nail tip 3 at the transition to the nail shank 2. In this case, the nail tip 3 is preferably designed to be pointed, but can also be rounded.

[0042] The nail head 4 is cylindrical and has a length of 1.5 to 4.5 mm in the longitudinal direction of the nail, in this case 3 mm. The outer diameter D.sub.K of the nail head 3 is in the range of 5.0 to 7.0 mm and in the example shown is 6.3 mm. It is essential that the diameter of the nail head 4 is 25 to 40%, in particular 34±1%, larger than the diameter D.sub.K of the axially rear end section of the nail shaft 2 adjacent to the transition region 5, which lies in the range between 3.5 mm and 5.5, mm and is 4.7 mm in the illustrated embodiment example.

[0043] The transition area 5 between the nail shaft 2 and the nail head 4 widens from the nail shaft 2 towards the nail head 4. The annular outer surface of the transition area 5 is curved towards the nail axis X, i.e. concavely, and in cross-section, i.e. in longitudinal section through the nail 1, the outer surface has the shape of a section of a circular arc in cross section extending over a circumferential angle of 90°. The outer surface begins directly at the front outer peripheral edge of the nail head 4 and merges continuously into the nail shank 2. Thereby, the circular arc-shaped section has a radius of curvature R, which is ≥0.3 mm, preferably ≤0.6 mm, and is 0.8 mm in the illustrated embodiment example.

[0044] The nail 1 has an overall length in the range of 50 mm and 90 mm, the overall length being 58 mm in the illustrated embodiment example.

[0045] In the nail 1 shown in FIGS. 1 to 3, the nail shank 2 has a constant diameter over its entire length.

[0046] The embodiment of the nail 1 according to the invention shown in FIGS. 4 to 8 differs from the embodiment shown in FIGS. 1 to 3 only in that the nail shank 2 is not smooth with a constant cross-section over its entire length. Rather, only the rear end section 2a of the nail shank 2 adjoining the transition area 5 is smooth with a constant diameter of 4.7 mm in this case. This axially rear end section 2a extends over a distance of 15 mm.

[0047] The axial shank section 2b adjoining this axially rear end section 2 in the direction of the nail tip 3 does not have a smooth outer surface. Rather, anchoring structures 6 are formed on this axial shaft section 2b, each of which has a structure section 6a tapering conically towards the nail tip 3 and a transition section 6b adjoining it at the rear. A total of 15 such anchoring structures 6 are provided on the axial shaft section, each of which is formed in the same way.

[0048] Specifically, the anchoring structures 6 have a maximum structural diameter D1 that is larger than the shank diameter D.sub.S of the rear end section 2a of the nail shank 2 that adjoins the transition section 5. In this case, the maximum structure diameter D.sub.1 should be at least 1.5% and/or at most 3% larger than the shank diameter of the rear end section 2a of the nail shank 2. In the illustrated embodiment example, the maximum structure diameter D.sub.1 is 4.8 mm and is located in each case at the rear end of the conically tapering structure sections 6a facing the nail head 4. In other words, the maximum structure diameter D.sub.1 is 2.1% larger than the shank diameter D.sub.S of the axial rear end portion 2a of the nail shank 2.

[0049] The anchoring structures 6 have a minimum structure diameter D.sub.2 at the front ends of the conically tapering structure sections 6a, which is smaller than the shaft diameter D.sub.S at the rear end section 2a of the nail shaft 2 that adjoins the transition area 5. In this case, the minimum structural diameter D.sub.2 should be smaller than the shaft diameter D.sub.S of the axially rear end section of the nail shaft 2 by at least 8% and/or at most 12%. In the illustrated embodiment example, the minimum shank diameter D.sub.2 is 4.3 mm, so that it is 8.5% smaller than the shank diameter D.sub.S.

[0050] The transition sections 6b located on the rear sides of the conically tapering structural sections 6a facing the nail head 4 are formed in two stages, the transition stages each having a circular segment-like cross section. The radius of curvature K.sub.1 of the second transition stage is larger than the radius of curvature K.sub.1 of the first transition stage. In the example shown, the radius of curvature K.sub.1 of the first transition stage is 0.2 mm and the radius of curvature K.sub.2 of the second transition stage is 0.25 mm.

[0051] Between the axial shank section 2b, on which the anchoring structures 6 are formed, and the nail tip 3 lies a further front end section 2c with a constant outer diameter, which corresponds to the shank diameter of the axially rear end section 2a of the nail shank 2 adjoining the transition area 5 and has an axial length of 0.5 to 1.5 mm, here 1 mm.

[0052] The nails 1 according to the invention can be made from a solid material, in particular a bar material, by turning or lathe work.