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RU-2861711-C2 - CORNER JOINT OF TWO WOODEN BEAMS

RU2861711C2RU 2861711 C2RU2861711 C2RU 2861711C2RU-2861711-C2

Abstract

FIELD: construction industry; woodworking industry. SUBSTANCE: invention represents a design of a profiled wooden beam. The corner joint of two wooden beams is characterised in that the beams are made with diagonal cuts at the same angle, wherein on the cut plane of the first beam, a tenon and an adjacent groove are made over the entire height of the beam, wherein the groove is at least three times wider than the tenon, wherein the tenon and groove on the first beam are shifted to the right from its vertical axis along the cut surface by an amount equal to at least the width of the tenon, and on the cut plane of the second beam, a tenon and groove are made, identical to the tenon and groove of the first beam, but with a shift to the left from its vertical axis along the cut surface by an amount equal to the shift value on the first beam, wherein the connection of the beams forms a closed technological groove between the tenons over the entire height of the beams, into which a wooden rectangular dowel is inserted for sealing the joint. EFFECT: providing a strong and sealed corner joint. 3 cl, 3 dwg

Inventors

  • GRACHEV VLADIMIR MIKHAJLOVICH
  • TATARINOV ALEKSANDR STEPANOVICH

Dates

Publication Date
20260508
Application Date
20241108

Claims (3)

  1. 1. An angular joint of two wooden beams, characterized in that the beams are made with diagonal cuts at the same angle, wherein on the plane of the cut of the first beam a tenon and an adjacent groove are made for the entire height of the beam, wherein the groove is no less than three times wider than the tenon, wherein the tenon and groove on the first beam are shifted to the right of its vertical axis along the surface of the cut by an amount equal to no less than the width of the tenon, and on the plane of the cut of the second beam a tenon and groove are made, identical to the tenon and groove of the first beam, but with an offset to the left of its vertical axis along the surface of the cut by an amount equal to the amount of offset on the first beam, wherein the connection of the beams forms a closed technological groove between the tenons for the entire height of the beams, into which a wooden rectangular dowel is inserted to seal the joint.
  2. 2. An angular connection of two wooden beams according to paragraph 1, characterized in that a through hole is made in the wooden rectangular dowel.
  3. 3. An angular joint of two wooden beams according to paragraph 2, characterized in that a cylindrical rod, the length of which is equal to the height of the beam, is inserted through and through into the through hole of the wooden rectangular dowel in such a way that it has the ability to be sunk into the hole of the underlying dowel of a similar angular joint of beams located below by half its length.

Description

Field of technology A design of a corner joint made of heat-insulating wooden beams is known (patent RU 2531128, E04B 1/10, filed 17.05.2013, published 20.10.2014). This design is a complex and labor-intensive engineering solution, suitable only for large-scale wooden structures. However, a significant drawback of this corner joint should be noted: its significant thickness leads to uneven moisture distribution between the outer and inner walls. As a result, uneven shrinkage occurs during operation of the outer contour formed by the outer walls and the inner contour formed by the inner walls. This, in turn, causes vertical movement of these contours, leading to the appearance of longitudinal cracks. Such cracks significantly reduce the structure's ability to retain heat, shorten its service life, and negatively impact its reliability. A known angular joint of elements "in half a tree" on dowels in the crowns of a building, in which one of the dowels is made of a plate and the side walls of the triangular prismatic projections, located on the outer side of the elements of each direction, are made with placement in one vertical plane, and in the horizontal platforms along the lines of connection of the platforms with the side walls of the triangular prismatic projections, located on the outer side, vertical slotted grooves of width t and depth of no more than h/4 are cut, in which vertical plate dowels are installed (RU 104206, E04B 1/10, declared 08.09. 2010, published 10.05.2011). The well-known "half-timber" corner joint with dowels in building crowns has several drawbacks: the design incorporates lamellar dowels and complex triangular prismatic projections, which complicates the manufacturing and assembly process; cutting vertical slotted grooves requires high precision and specialized equipment, which increases labor and manufacturing costs; vertical lamellar dowels may not provide a secure connection due to possible displacement or displacement from the slotted grooves; the arrangement of the side walls of the triangular prismatic projections in a single vertical plane can lead to uneven load distribution, which reduces the strength of the connection. A thermal lock is known from the prior art for corner connections of logs or beams (patent RU 2684922, E04B 1/10, declared 02.08.2018, published 16.04.2019) characterized in that it contains mating logs or beams having at least one butt-shaped groove that forms parts with a lower and a higher cross-sectional height on the logs or beams, made in such a way that when laying logs or beams in a corner connection between the lower surface of the part with a lower cross-sectional height of each upper log or beam and the upper surface of the part with a lower cross-sectional height of each lower log or beam there is at least one horizontal gap communicating with at least one gap made at an angle to the horizontal gap formed when laying logs or beams in a corner connection between the side surfaces of parts with a smaller and larger cross-section of perpendicularly mating logs or beams, together creating a system of cavities inside the corner joint, intended to be filled with a sealed material in order to form a monolithic frame along the entire height of the corner joint. Disadvantages of this joining method: horizontal and vertical gaps between logs or beams can lead to the formation of cavities within the corner joint and become a source of moisture accumulation, which can lead to wood rot and reduce the thermal insulation properties of the joint; the presence of grooves and gaps complicates the installation of logs or beams into the corner joint and can lead to installation errors and a decrease in the reliability of the joint; filling the cavity inside the corner joint with a sealed material requires additional effort, time, and resources; the presence of grooves and gaps, if not completely filled with a sealed material, can lead to a decrease in the thermal efficiency of the structure. Another known corner joint assembly consists of a vertical post and crown elements made of logs or beams. The logs are attached to the post using a dovetail joint. The post on one or both sides of the joint has a closing ledge, which is made integral with the post. This projection runs the entire length of the post and overlaps the ends of the connected logs, extending onto the side surface of the logs by a certain distance (patent for invention RU 2178483, E04B 1/10, E04B 2/08, filed 17.02.1997, published 20.01.2002). However, such a structure, consisting of logs, is complex and labor-intensive, both during the manufacturing stage of its components and during assembly and disassembly. The dovetail joint elements must be manufactured with high precision. Logs can only be installed into the post in this design from the upper end, which creates additional difficulties and does not allow the use of insulation for the joints. The need for projections that overlap the ends of the l