RU72994U1 - LONGITUDINAL JOINING OF LOGS - Google Patents

Abstract

The utility model relates to wooden housing construction, in particular, to the structures of the longitudinal joints of log houses used in the construction of houses, baths and other outbuildings. The longitudinal connection includes a longitudinal spike and a groove made respectively on the upper and lower sides of the log symmetrically to the vertical axis of the connection of the logs. The upper part of the pin is formed by two flat surfaces located at an oblique to the side of the groove oblique angle, and the lower part of the pin having inclined surfaces on each side with the angle, size and direction that the upper parts of the pin are relative to the axis of symmetry, mate with two vertical and four inclined flat surfaces on which the contact of the logs is carried out when they are connected. The proposed design of the longitudinal connection of the logs of the log allows to exclude the formation of cracks in the log due to the labyrinth seal, eliminates the ingress into the joint, reduces the need for calibration of logs, simplifies their manufacture and assembly technology of the log.

Description

The utility model relates to wooden house-building and, in particular, to the structures of the longitudinal joints of logs of wooden log houses used in the construction of log houses, bathhouses and other household buildings.

A known design is the longitudinal connection of the logs of the log house, in which logs are used that are machined according to the outer diameter, for example, round logs with a mechanically made semicircular longitudinal groove in the lower part of the log through which the log connects to the previous log (RF patent 2236519 C2, 10.10.2002)

The rounding of logs in such a design due to cut outer layers reduces the strength and durability of the log, gives a lot of unreasonable waste and requires the use of an expensive woodworking machine.

The widely used known longitudinal connection of logs of a log house includes interacting logs containing, on the lower side, a longitudinal groove bounded by flat surfaces, for connecting them to the previous stacked logs, and in the upper side of the log, a longitudinal spike bounded by flat surfaces (SU patent No. 33 from 08/17/1921).

However, the decision on patent SU No. 33 of 17. 08.1921, has the following disadvantages. The spike is located on a horizontal plane, which allows moisture to penetrate into the connection. A significant drawback is that the existing recess in the upper part of the tenon reduces the mechanical strength of the tenon itself.

Patent SU No. 33 of 17. 08.1921, was selected as a prototype.

The objective of the proposed technical solution is to create a design for the longitudinal connection of the logs of the log house, eliminating the formation of cracks and direct penetration of air into the log house, the impossibility of moisture flowing into the joint and allowing to receive the logs in industrial production in final form with a minimum amount of waste and production costs.

The problem is solved in that a longitudinal spike is made in the upper side of the log symmetrically to the vertical axis of the log connection, the upper part of which is bounded by flat surfaces, and the lower part of the spike has inclined surfaces on each side, with the angle, size and direction that the upper parts of the spike have relative to the axis of symmetry. A longitudinal groove is made in the lower side of the log, bounded by flat surfaces corresponding to the planes of the tenon.

And also by the fact that the upper part of the tenon is formed by two flat surfaces located beneath a convex oblique side of the groove, mating respectively with two vertical flat surfaces, which, in turn, are mating with two outward inclined outward surfaces, on which the contact of the logs occurs their connection.

The proposed shape of the longitudinal connection of the logs of the log house incorporates the advantages of a semicircular groove (economical form and the impossibility of moisture to flow inside the joint) and added strength and better thermal insulation of the grooves due to the rectangular shape. An advantage is also that when processing longitudinal tenon elements on a log, it does not require preliminary sanding and calibration, which significantly reduces the cost of the final product.

The essence of the utility model is as follows. The longitudinal connection of the logs of the log house includes the interaction between the logs, which contain a longitudinal groove for their connection with the previous stacked log.

The longitudinal connection of the logs is characterized in that the upper part of the tenon forms an angle between two flat surfaces located at a convex angle in the direction of the groove. Surfaces mate with two

inclined surfaces in the groove along which the contact of the logs is carried out when they are connected.

The longitudinal connection of the logs of the log house is characterized in that the lower part of the spike has inclined surfaces on each side to eliminate the ingress of moisture inside. The angle of inclination, their dimensions and direction repeat the same parameters that have the upper parts of the tenon relative to the axis of symmetry. The lower part of the spike mates with two inclined surfaces of the groove, along which the contact of the logs is carried out when they are connected.

The drawing (figure 1) shows a longitudinal connection of logs 1 and 2 of the log house. Figure 2 shows a fragment of a longitudinal connection of these logs in cross section.

The width of the longitudinal connection A, in the General case, you can do any. But it practically depends on the diameter of the processed log and is approximately equal to the radius R of the log. When A is less than R, the thermal insulation characteristics of the connection of logs deteriorate, and when A is greater than R, manufacturing is complicated, and unreasonable losses of building material increase.

In practice, the optimal ratio was chosen for the width of the longitudinal connection of the logs: A = 1.12 R, and the height n of the vertical planes 7 and 8 is equal to half the height H of the tenon. The width of the planes 3, 4, 5, 6, forming a longitudinal connection (figure 2) will also depend on the average diameter of the log in the log house.

It is convenient to make mechanically longitudinal grooves and spikes on logs with a compound cutter with a width equal to A, composed of four cutters with a width equal to one quarter A and having pairwise different diameters. Changing the location of the cutters on the machine shaft, these four cutters can produce either a spike or a groove (Figure 3, Figure 4).

Changing these sizes affects the performance of the proposed longitudinal joint. The processing of the spike elements on the log is carried out parallel to the upper and lower generatrix of the log, and therefore the requirements for small variations in the diameter of the log are reduced.

The assembly of the log house is as follows. A tape insulation (not shown) is placed on the spike of the lower log along the entire length of the log. Then on

lower log stack the upper log with a groove to the lower log, as a result, the longitudinal spike of the log fits snugly into the groove of the upper log to the stop. The logs come into contact along the inclined surfaces of the tenon and groove and form a labyrinth seal, preventing the penetration of air into the log house. The vertical flat surfaces of the spike and groove provide greater mechanical strength of the walls of the log house. The manufacture of longitudinal and elements of angular fixation of logs in an industrial environment allows the assembly of a log house without additional adjustment and refinement.

Claims (2)

1. The longitudinal connection of the logs of the log house, including interacting logs containing a longitudinal groove on the lower side of the log and a longitudinal spike on the upper side of the log for connecting them to the previous stacked logs, characterized in that the upper part of the spike is formed by flat surfaces located at an obtuse angle, mating, respectively, with two flat vertical surfaces, which in turn are mating, respectively, with two inclined surfaces in the groove, along which CT logs at their junction. 2. The longitudinal connection of the logs according to claim 1, characterized in that the lower part of the tenon having inclined surfaces on each side, with the angle, size and direction that the upper parts of the tenon have relative to the axis of symmetry, mates with two inclined surfaces of the groove, on which the contact of the logs is carried out when they are connected.