CS239256B1 - Board joint with cut pairs of arbors - Google Patents

Abstract

The gusset plate is intended for joining wooden parts. Pairs are cut thorns with a wider heel section passing unilateral Oblique rise to slim symmetrical parts ending with two-sided tip .. On the inner edge of the slender part can be triangular teeth or protrusions

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punched nail plate for joining wooden parts.

For fast and load-bearing joining of wooden parts, constructions are used metal, so-called multi-nail boards pressed into wood at the joints of neighboring wooden parts. The nail plates are known in various embodiments.

The most widespread are plates, in which the pressing of each hole produces a single mandrel slim and symmetrical, pressed into a low V profile and terminated on both sides. These plates have relatively long mandrels, about 10 times the sheet thickness.

Plates are also produced, where 2 mandrels are cut and bent from one hole. These are, for example, two opposed triangular mandrels forming a virtually one-sided tip approximately 8 to 10 times the thickness of the material.

The inner edge of the triangular mandrel has irregular toothed roughening. Other plates with pairs of relatively shorter but wider mandrels with one-sided tips are rounded at the heel.

The design and dimensions of the mandrels, as well as their density on the plate, influence their use in relation to the loading conditions of the joints.

SUMMARY OF THE INVENTION The invention is based on the fact that the nail plates with pairs of mandrels are provided with mandrels with a wider heel portion, which extend on one side to a slender (symmetrical) ending with a two-sided tip.

There may be triangular teeth or protrusions on the inner edge of the slender portion. These nail plates combine the appropriate properties of plates with pairs of mandrels from a single hole with the advantages of longer, largely symmetrical mandrels pressed into a low V shape.

1 and 2 show the principle of a plate with pairs of mandrels - FIG. 1 a side view, FIG. 2 a plan view. 3 to 5 show details of the pairs of mandrels in the stowed position into the opening.

Giant. 3 shows mandrels without protrusions only with a low V embossing, in fig. 4 mandrels with an inner toothed edge of the slender part and in fig. 5 mandrels with blanks that form protrusions on the inner edge.

A pair of mandrels 2 are formed into the base material, the metal plates 7, forming mutually offset rows. The mandrel 2 has a wider heel portion 2 ^{with a} one-sided inclined lead 4 from the slender portion 5, which terminates in a double-sided tip 6.

The chamfer part 2 may have both edges without further treatment or the inner edge 7 is provided with suitable protrusions. E.g. according to FIG. 4, the inner edge 7 can be formed by triangular teeth 8, or according to FIG. 5, there are cutouts 10 at the inner edge T, which form protrusions 9.

In the slender part 5, the mandrel is pressed into a low V-profile 11. The surface area of the mandrel 2, their profile 11 and the adjustment of the inner edge T affect the load that the mandrel 2 can transmit. The bent part 5 of the mandrel 2 with the double-sided tip 4 contributes to good conditions for pressing the plate 4 into the wooden parts and the oblique run 4 of the heel part 4 improves the coherence of the pins 2 with the base plate 1.

The gusset plates according to the invention can be made of different thicknesses of materials and can be used for joining load-bearing structures as well as predominantly fixative joints of wooden parts.

Claims (3)

SUBJECT OF THE INVENTION Clamping plate with pairs of mandrels for connecting wooden parts, characterized in that the wider heel part (3) of the mandrel (2) passes through a one-sided inclined lead (4) into a slender part (5) ending with a two-sided tip (6). Gusset plate according to claim 1, characterized in that there are triangular teeth (8) on the inner edge (7) of the slender portion (5). Gusset plate according to claim 1, characterized in that there is at least one projection (9) below the double-sided tip (6) at the inner edge (7).