DE8911395U1 - Palisade with reduced shrinkage cracking on the outer surface - Google Patents

Description

Gebr. Kühne GmbH & Co., sawmill and timber wholesaler An der Straut 1, 34o4 AdelöbSten.·*..". ."..··.

DESCRIPTION

Title: Palisade with reduced shrinkage cracking on the outer surface

Genus: The invention relates to palisades,

Cylindrically milled round timbers etc. according to normal growth (conical), planed round timbers.

Stami: Milled and peeled palisades and round timbers Ti^tStt known.

Criticism: A disadvantage of the milled and peeled

Palisades and logs are the natural

ScksUciverhalLen during drying.

It forms on the surface (Fig. 1)

The formation of cracks is undesirable for the following reasons:

1.) Appearance

2.) VV. ^; risk of injury

3.) The impregnated palisade has an outer zone (approx. 10-30 mm) which is protected from rot and beetle infestation by the impregnation.

If the dry crack is deeper than the protected zone, a source of rot will develop in the depth of the crack under the appropriate conditions (humidity and temperature). The palisade can then rot from the inside out. (Fig. 1)

Task: The invention is based on the task of preventing uncontrolled shrinkage cracks and instead creating an opportunity for the round wood to shrink without cracking.

Solution: The palisade or round wood with reduced

Shrinkage cracking is milled or peeled like the normal palisade; in addition, a cove is milled along the palisade and a sawn joint is sawn from the cove to near the center or into the center. (Fig. 2) Even without the sawn joint, the cracking is already reduced or a target cracking point is specified in the cove. During the subsequent drying, the shell will shrink and, due to the cove and the sawn joint, a reduced cracking

Gebr. Kühne GmbH & Co., sawmill and wood wholesaler An der Straut 1, 34c4 dft

occur in the coat.

The kerf opens in a wedge shape.

Advantages: Due to the cove and the sawn joint

an additional impregnated zone will be created along the cove and the sawn joint. (Fig.6)

There is therefore additional wood protection.

The palisade and the round wood processed in this form are used like the normal palisade in gardening and landscaping. Other areas of application such as fence construction, protective walls, log house construction are conceivable. When used horizontally, hardly any visible joints are created due to the cove.

Gebr. Kühne GmbH & Co., sawmill and wood wholesaler An der Straut I, 34o4 Ad,el,ehsen,

Description of the sketches

Fig. 1: Conventional palisade or impregnated round wood in the dried state with drying cracks. (Shrinkage cracks)

Fig. 2: Palisades with cove and kerf led into the "entrum".
R2<R1 in fresh (wet) state

Fig. 3: Palisade (round wood) in wet condition with cove and kerf

Fig. 4: Palisade (round wood) after drying with cove and sawn joint. The arrows show the tangential shrinkage direction. The sawn joint opens in a wedge shape and the cove shows an increased radius due to the shrinkage.

Fig. 5: Palisade (round wood) with cove and sawn joint when dry. The radius R3 of the cove corresponded to approximately R1 when wet. After drying, open joints are created at the connection to the next palisade

Fig. 6: Palisade (round wood) with cove and sawn joint in the dried state. The edges of the cove to the shell of the round wood are laid out in the adjoining palisade. The radius of the cove was chosen correctly here.

The impregnated zone is marked by hatching.

Claims (1)

Protection claims 1.) Round timber (palisade) with reduced shrinkage crack formation is characterized by the fact that the round timber is provided with a cove and, if necessary, additionally with a sawn joint from the cove to the center.