SU937644A1 - Fastener for connecting wooden parts - Google Patents

Description

one

The invention relates to construction and is intended to connect elements of wooden structures, such as trusses, arches, frames, panels.

A fastening element for connecting elements of wooden structures is known, which includes a metal plate equipped with slots with studs bent to the () sides of Cl. .

When connecting wooden structures, the toothed plates are placed between the joint elements and the joint is further compressed with a bolt.

The disadvantage of this fastener is the impossibility of connecting the wooden structures in the horizontal plane, and the shape of the tooth and its sharpness during pressing cause large tensile stresses in the wood, which leads to cracking, especially in hard wood.

Also known is a fastener for connecting elements of wooden structures, including a metal plate with slots and studs placed in two adjacent rows cut in opposite directions offset one with respect to the other, with the bases of studs broadening with identical arms 12.

The disadvantage of this technical solution is insufficient stiffness of the studs and bending of the studs during the pressing. In addition, the unidirectionality of the studs of the plate makes it ineffective when working in nodal joints of several elements.

Claims (3)

The closest in technical essence and the achieved result to the invention is a fastening element for connecting wooden parts, made in the form of a layer, placed on common axes along the perimeter and diagonally with right angle slots with stamped from each of them opposite sides of single and pair studs GZ. The orientation of the stamped studs in the known fastening element is carried out in two mutually perpendicular directions to the axes, which does not sufficiently provide rigidity and uniformity of the connection plate, especially when several different oriented parts of the wood . The purpose of the invention is to increase stiffness and equal strength. This goal is achieved by the fact that in a fastening element for connecting wooden parts, made in the form of a plate, with rectangular slots located on common axes and diagonal l and slotted with each of them in opposite directions with single and paired the pins, the plate is provided with auxiliary pins placed between the rectangular slots, on the axes and diagonals shared with them, the pair pins having a common base and oriented together with single pins to their planes perpendicular Fig. 1 shows the fastening element, a top view; Fig.2 fragment of the fastener. The fastener for connecting wood parts includes a metal plate 1, single studs 2, pair studs 3 and auxiliary studs. The fastener is made as follows. On the metal plate within the formed square cells, the slot slots are placed one by one along the perimeter and two diagonally. two sides and a circular taper 8 of the same radius as the base of the pair of studs. The arrangement of the slits and studs on the sides and diagonal of each square of the centering grid makes the plate of equal strength in different directions. The orientation of the studs by a wide edge perpendicular to the indicated directions increases the rigidity of the plate during pressing. When mating in a knot of elements of wooden structures at different angles, a portion of the teeth of such a plate will always cross the wood fibers at angles close to 90 °. This achieves reliable operation under a flat stressed state. The broadening of the base of the studs is rounded, which increases their strength by reducing the stress concentration, and this form of broadening simplifies the manufacturing technology of the equipment. The shape of the spikes yMeHbujaet tensile stresses in the wood, especially solid porids, leading to the formation of cracks. Claims of fastener for connection. wooden parts, made in the form of a plate, with rectangular cuts placed on common axes along the perimeter and diagonally, with single and pair pins stamped from each of them in opposite directions, so that that, in order to increase rigidity and uniform strength, the plate is equipped with auxiliary studs placed between the rectangular slots, on the axes and diagonals shared with them, while the pair of studs have a common base and are oriented together with single and studs erpendikul angles respectively to the axes and diagonals. Sources of information received into account when examination 1 .. Abstract collections. Building construction. Building physics. TsINIS Gosstro of the USSR, ser.8, vol.9 M., 1979, p.32, 2. The patent of the USSR M 579925, class. E 0 V / CE, 1977. 3. US patent number 3382.752, class. 85-13, 19b5 (prototype).