FI86100C - Lumber joint for lap timber - Google Patents

Description

1 86100

LOG JOINT FOR ROUND LOGS

The invention relates to a log joint for round logs as defined in the preamble of claim 1.

A round log joint is already known, in which round logs are stacked on top of one another to form a corner joint, i.e. a latch. A notch is provided in each log to which the underlying log is arranged in the transverse direction.

The problem with the known round log joint is that due to the natural life of the wood material, cracks form in the log joint. The cracks cause traction, especially in the corner joints of a log building, and heat leaks during the cold 15 seasons. In addition, rainwater can penetrate through the cracks in the wall structure and thus expose it to possible rot damage.

The object of the invention is to eliminate the above-mentioned drawbacks.

The log joint according to the invention is characterized by what is stated in claim 1.

: ': To a log joint according to the invention for round logs, in which the round logs are connected alternately at an angle of 25 to one another, in particular to a corner joint, i.e.:. to form a salve, each log includes a recess into which the other log is fitted. According to the invention. The notch surface is concave in the transverse direction of the log and in the longitudinal direction of the second log fitted thereto, and the notch is provided in the longitudinal direction of the log with a plurality of wedge members '' arranged to extend parallel over the notch.

. In one application of a log joint, the ends of the wedge members closest to its edges extend outwardly from the concave surface of the T 35 notch to at least an approximate * ... * en-imaginary plane connecting the edges of the notch «· * and the ends of the other wedge members extend from the notch \ 2 outwardly between the concave surface and said plane.

In one application of a log joint, the wedge members are triangular in cross section.

In one application of a log joint, there are preferably four wedge members.

In one application of the log joint, the notch is provided in the vicinity of the wedge members with grooves which extend over the notch in the direction of the wedge members and in which 10 sealing strips are fitted with sealing strips.

In one application of the log joint, the grooves are arranged in the vicinity of the wedge members closest to the edges of the notch.

In one application of the log joint, the sealing strip is formed of flexible thermoplastic.

In one embodiment of a log joint, a resilient insulating tape, such as a glass wool tape, is adapted to a notch having a width greater than the distance of the outer wedge members of the notch in the transverse direction of the log 20 and having an maximum width of the notch approximately.

The advantage of the invention is that the log joint forms a seal. Heat leaks in corner joints are clearly reduced compared to known joints.

. ·. A further advantage of the invention is that the wedge members effectively stop the propagation of moisture to the structures, especially when used in addition to the wedge member; . sealing tapes and / or flexible insulating tape.

* · * · * Furthermore, thanks to the invention, the wedge members smooth the different life of the wood in the log joint.

Furthermore, the invention makes it possible to use various: sealing strips, e.g. depending on the environmental conditions, in order to obtain a tight connection.

«* *

In the following, the invention will be described in detail with reference to the accompanying drawings, in which • Figure 1 schematically shows a corner joint of a log building in a perspective view, in which corner joint 3 86100 log joints are made according to the invention; Figure 2 shows a log with a notch for a log joint; Figure 3 shows a cross-section A-A of the log of Figure 2; Fig. 4 shows another log for notching with a notch; and Figure 5 shows a cross-section B-B of the log of Figure 4.

Figure 1 shows a corner joint of a log building, i.e. a latch formed by round logs 1, 2.

10 Reference numerals 1 denote logs parallel to, and reference numeral 2 denotes other logs set at right angles to them. Each log 1, 2 has a notch 3. The logs 1, 2 are arranged in a corner joint so that the first log 1 rests at its notch 3 on the round back 8 of the second log 2, below which is the notch 3 of the second log, etc. The notch 3 is fitted. to follow the round back 8 of the second log. It then forms a symmetrical cylindrical surface, the axis of symmetry of which is at an angle, most preferably at right angles to the longitudinal direction of the log. The logs 1, 2 are then provided with a notch 3 only on one side, whereby they are similar at the corner joint.

; * · *: Fig. 2 schematically shows a part of a log 1, 2, in which a notch 3 is arranged. In Fig. 3: it can be seen from the cross-section A-A that the surface 3a of the notch is concave in the transverse direction of the log. Figure 3 *. to illustrate the edges 3b, 3c of the notch, an illustrated plane C-C is drawn, from which it can be seen that the degree of hardness of the notch 3 is relatively small.

‘'Loveus 3 is provided with a set of wedges spaced apart in the length ν' direction of the log. organs 4. They extend beyond the whole notch following it, ···. the inner surface as parallel and uniform projections.

• · 35 The wedge members 4 are coaxial in cross section • · · * ... * with projections 40, 41, i.e. a tip projecting outwards from the notch 3 • »• / • l. There are preferably 4 86100 four wedge members 4. They are arranged to extend in the longitudinal direction of the log curved along the surface 3a of the notch uniformly from one edge parallel to the axis of symmetry of the notch.

The ends 40 of the wedge members 4a closest to the edges of the notch 3 extend outwards from the concave surface 3a of the notch 3 at least approximately to the imaginary plane C-C connecting the edges 3b, 3c of the notch. The ends of the other wedge members 4b extend outwards from the concave surface 3a of the notch 3 between this surface and said plane C -C.

Figures 4 and 5 show another log 1, 2, by means of which another log joint according to the invention can be realized. In this case, the notch 3 15 is provided with grooves 5 in the vicinity of the wedge members 4. The grooves 5 are arranged in connection with the wedge members 4a closest to the edges 3b, 3c of the notch 3 inside the wedge members 4a. The position of the grooves 5 with respect to the edges 3b, 3c of the notch 3 is then considered. The grooves 5 are arranged to pass over the notch 3 in the direction of the wedge members 4. Sealing strips 6 are arranged in these grooves 5.

The sealing strips 6 are, for example, rubber or flexible thermoplastic. They may be in the form of lips or,. Ball seals. A wide variety of options for their mate-. ♦ e ·. 25 in terms of rial and cross section are possible.

'. *. An insulating strip 7, such as a glass wool or rock wool strip, can be arranged in the joint between the round logs 1, 2, as illustrated in Fig. 1.

• · · v * The insulating tape 7 is somewhat wider in width • · V .: 30 than the distance of the outer wedge members 4a of the notch 3 in the transverse direction of the log. The width of the insulating tape 7 is at most approximately the width of the notch. This is; * · *: shown in dashed lines in Figure 3.

*. The log joint according to the invention works in principle as follows. The logs 1, 2 are stacked '···' so that the notch 3 of each first log 1 is facing downwards and is placed at an angle at the corner joint against the round back 8 of each second log 2, the edges 3c, 3d and outer wedges of the notch -met 4a press against the back of the log 8. According to the living of the log joint, at least the wedge members 4 rest against the round back 8 of the log 5 and keep the joint between the logs 1, 2 tight. A better result is obtained if sealing strips 6 are used from the joint, which are arranged at least in the vicinity of the outermost wedge members 4a. In this case, due to the resilience 10 of the sealing strips 6, with the life of the wood, even possible large cracks are sealed by means of the sealing strip.

The sealing effect of the log joint can be improved by means of an insulating tape 7. In this case, the wedge members 4, and in particular the outer wedge members 4a, press the insulating strip 7 firmly against the round back 8 of the log 2 below and prevent, for example, the absorption of capillary water through the insulation 7 into the deeper joint.

The invention is not limited solely to the application examples presented above, but many modifications are possible while remaining within the scope of the inventive idea defined by the claims.

• · • · · • • »· • ·» * ♦ · • «· • * · a

Claims (7)

1. A log for circular logs, in which the circular logs (1, 2) are alternately at an angle relative to each other, specially joined together to form a corner joint or block building, in which in each log (1) there is a notch (3 ), in which another log (2) has been adapted such that the first log (1) rests on the round back (8) of the second log (2) at the location of the notch (3), characterized in that - 3) surface (3a) is concave in the transverse direction of the log (1) and in the longitudinal direction on the log (2) to be adapted therein, and the degree of concavity (3) is relatively small; - the notch (3) is provided in the longitudinal direction of the log (1) with an amount of wedge elements (4) spaced apart from each other, which are arranged to extend next to each other over the notch (3); and the ends (40) of the wedge elements which are closest to the edges (3c, 3d) of the chopping (3) extend outwardly from the concave surface (3a) of the chopping (3) at least almost all the way to the intended straight line (C - C), which in the transverse plane of the rivet plane joins the edges of the notch (3) and: * ·]: the ends (41) of the other wedge elements (4b) extend from the concave surface (3a) of the notch (3a) leaking between it: concave surface and said straight line (C-C). 2. Stock joint according to claim 1, characterized in e. so that the wedge elements (4) in intersection are triangular in shape. Stock joint according to claim 1 or 2, characterized in that the wedge elements are divided into four parts. . 4. Stock joint according to some of the preceding patent * · ·. ···. Characterized in that the cut-in m (**) in the vicinity of the wedge elements (4) is provided with cutters (5), which are arranged to extend over the cut-in gene (86). ) in the direction of the wedge elements (4), to which the sealing strips (6) of the cutters (5) are adapted. 5. Stock joint according to claim 4, characterized in that the cutters (5) are arranged in the vicinity of the wedge elements (4a) which are closest to the edges of the cut-in (3). 6. Stock joint according to claim 4 or 5, characterized in that the sealing band (6) is formed of elastic thermoplastic. Stock joint according to any of the preceding claims, characterized in that an elastic insulating band (7), such as a glass wool band, has been fitted in the cut-in (3), the insulating band to its width being greater than the clearance of the outer wedge elements (4a). in the transverse direction of the log and which width of the insulating band is greatest is almost as wide as the chopping. «♦ · * · i