EP2476523A1 - Wood part for improving defects in wooden components - Google Patents

Abstract

The wood patch part (1) is inserted in a recess within wood component. An upper side and a lower side are provided with outwardly curved contour. A sheet connection element is provided at the lower side in rectangular cross-section. The sheet connection element runs in longitudinal direction (L) of the wood patch part. An independent claim is also included for a method for repairing defects in wood components.

Description

The invention relates to a Holzflickteil for repairing defects in wood components, which Holzflickteil is executed in a running at the location of the defect, the shape of the Holzflickteils corresponding recess in the timber component, wherein the Holzflickteil has a flat top and a bottom with outwardly curved contour. The invention further relates to a method for repairing defects in wood components.

In the production of sawn timber, particularly in the manufacture of side boards or glue board, the quality of the board is essentially dependent on the presence of wood defects. Wood defects are, for example, cracks and branches, rotation, resin galls, insects and fungi.

In accordance with the guidelines of ÖNORM 7215, the visual defects must be repaired to correct the wood defects, in particular, winged bats and resin galls. The faulty spot, for example a winged hole, is usually milled out, so that a patch part can be fitted into the recess while knocking and / or glued in place.

Exemplary here is the AT 504 184 B1 mentioned, which describes such a Holzflickteil, which has substantially the shape of a cylinder segment, wherein the end face is flat and the underside has an outwardly arcuately curved structure. The underside and the end face converge in an end region, wherein the end region is delimited by an arcuate outwardly extending edge in the plane of the end face. Due to the aforementioned surface design, a high self-clamping force is ensured with appropriately prepared faulty location.

In the prior art Flick parts are also known, which have self-locking gears. If such a patch part is tapped into a defect, it holds thanks to the teeth firmly in this defect and the wooden board or glued wood can be further processed.

The DE 645 283 shows, for example, a method for repairing timbers, in which the flaws are removed by incising elongated recesses and then glued patch pieces in the recesses. The patch pieces are ship-shaped, having tongues and slots at the ends, in the recesses are made corresponding slots and tongues which cooperate with the patch pieces in key engagement. The disadvantage of this is the complex production of the patch pieces due the tongues and slots, in addition, the positive connection between the patch and recess when working the wood is not always guaranteed.

The DE 2125 799 shows a ship-shaped patch with cambered flanks for surface repair of resin galls. Although a self-clamping effect is achieved by the circular arc-shaped flanks, but certain dimensions must be complied with - when mending a thin board, for example, there is a risk that a hole is created when making the recess necessary for receiving the patch. After inserting the patch then the board must be planed not only on the top, but also on the bottom. There is also the risk that the underside of the board will be damaged by the breaking out of the cutter by breaking out of wood fibers.

The EP 0317498 B1 shows a patch for repairing flat faulty spots in the wood, which has the shape of a portion of a rotating body. The patch is self-clamping thanks to cambered flanks and can be dimensioned relatively freely, so that it is also suitable for repairing relatively wide flaws. The patch has on its underside an incision in the form of a peripheral groove with triangular cross-section - at the top, the patch has at its ends correspondingly visible pointed tongues. The disadvantage of this is that only flat areas can be repaired and the tongues remain visible from the outside, which can lead to openings and gaps, for example, when working the wood.

A disadvantage of the above-mentioned ship-shaped wood patches is in addition their high production costs, which also generates a lot of waste wood, which is not available for further processing. In addition, due to the tapered end portions of the patches, the risk of tearing the wood when fitting the patches in the milled recesses of the flaws.

It is therefore an object of the invention to provide an easy to produce wood patches, which can be used in particular for repairing defects in the edge region of wood parts.

This object is achieved with a Holzflickteil mentioned above according to the invention that at least one extending in the longitudinal direction of the Holzflickteils bung connection element is provided with a substantially rectangular cross section on the underside. Thanks to the invention, a simple and quick installation is possible. The Holzflickteil invention is held only more of the central bung connection element which cooperates by clamping with a corresponding counterpart in the milled flaw. This results in a uniform binder surface in which no external teeth are visible.

The corresponding bung connection element in the wood product is made with a suitable milling machine and then allows a selbstklemmendes connecting the Holzflickteils with the wood product. The patch part can then be mounted with glue after applying a hammer blow, the wood product can be finished immediately by grinding or planing. It does not matter whether the spot to be repaired is on the flank or edge of the wood product.

Conveniently, the bung connection element is a groove or a spring which is adapted to interact with a corresponding in the recess in the wood product corresponding bung connection element, which is designed as a spring or groove, self-locking. The tongue and groove connection or bumping are basically known types of plug connections - according to the wood patch part, for example, a groove executed and correspondingly in the recess at the location of the defect a spring, which then cooperate self-locking. The remaining underside of the Holzflickteils must not be designed especially self-clamping, resulting in more diverse design options.

In a variant of the invention, the curvature of the underside runs along the longitudinal direction of the Holzflickteils. Advantageously, the underside has a radius of curvature of 60 mm.

The Holzflickteil invention is just as well suited for flaws on the flank of the wood product to be repaired as for defects in the edge region. In such a variant of the invention for edge regions, the upper side of the wood patch part has a first planar top part and a second planar top part, which are connected to one another via a transition region, the first top part and the second top part enclosing an angle of less than 180 °. According to the common design of edge regions, the angle between the first and the second upper side part is 90 °.

In principle, however, different angular ranges can be realized, depending on how the edge region of the wood product to be repaired is designed. Accordingly, too to perform the transitional report, which may be rounded or polygonal. Conveniently, the transition region extends parallel to the longitudinal direction of the Holzflickteils. In a variant of the invention, the transition region is designed as an edge.

In a variant of the invention, a first flank region is located between the underside and the first upper side part of the wood flay part and / or a second flank region between the underside and the second upper side part, the first and the second flank region each extending perpendicular to the underside. Thus, an additional self-clamping can be achieved with a recess which is designed to correspond. If then the dimensions of the Holzflickteils, in particular its width (ie the extent normal to the longitudinal direction) are made slightly larger than the corresponding width of the recess holds the Holzflickteil after installation by self-clamping in the recess.

For visual reasons, the bung connection element and the transition region between the upper sides are made in the region of the 45 ° bevel of the Holzflickteils. This has the advantage that the Holzflickteil is visually hardly recognizable after assembly - especially for wooden parts used as visual quality resulting in the corresponding market and possibly also price advantages for the user.

1. a) Ausfräsen einer Ausnehmung mit einem Spundverbindungselement im Holzbauteil an der Fehlstelle;
2. b) Einsetzen eines Holzflickteils nach einer der oben geschilderten Varianten.

The object of the invention is further achieved by a method mentioned in the introduction, in which according to the invention the following steps are carried out:

1. a) milling a recess with a bung connection element in the timber component at the defect;
2. b) inserting a Holzflickteils according to one of the above variants.

The bung connection element in the recess can be designed as a tongue or groove and the Holzflickteil correspondingly have a corresponding spring or groove.

The attachment of the Holzflickteils can be supported for example by brushing the Holzflickteils and / or the milled recess with glue. The assembly itself is advantageously carried out by the Holzflickteil is tapped with a hammer in the recess.

• Fig. 1 eine perspektivische Ansicht der Oberseite einer ersten Variante des erfindungsgemäßen Holzflickteils,
• Fig. 2 eine perspektivische Ansicht der Unterseite einer ersten Variante des erfindungsgemäßen Holzflickteils,
• Fig. 3 eine erste perspektivische Ansicht des Holzflickteils aus Fig. 1 und Fig. 2 an einer auszubessernden Fehlstelle an der Kante eines Holzprodukts,
• Fig. 4 eine zweite perspektivische Ansicht des Holzflickteils an der auszubessernden Fehlstelle,
• Fig. 5Aeine erste Seitenansicht der ersten Variante des erfindungsgemäßen Holzflickteils in Längsrichtung des Holzflickteils,
• Fig. 5B eine zweite Seitenansicht der ersten Variante des erfindungsgemäßen Holzflickteils in Längsrichtung des Holzflickteils,
• Fig. 6Aeine erste Seitenansicht einer zweiten Variante des erfindungsgemäßen Holzflickteils in Längsrichtung des Holzflickteils,
• Fig. 6B eine zweite Seitenansicht einer zweiten Variante des erfindungsgemäßen Holzflickteils in Längsrichtung des Holzflickteils,
• Fig. 7 eine Längsansicht des erfindungsgemäßen Holzflickteils,
• Fig. 8 eine Schnittansicht (A-A) eines Holzflickteils gemäß der ersten Variante beim Einsetzen in eine Fehlstelle an der Kante eines Holzprodukts,
• Fig. 9Aeine Schnittansicht (A-A) eines Holzflickteils gemäß der zweiten Variante nach Fig. 6A beim Einsetzen in eine Fehlstelle an der Flanke eines Holzprodukts, und
• Fig. 9B eine Schnittansicht (A-A) eines Holzflickteils gemäß der zweiten Variante nach Fig. 6B beim Einsetzen in eine Fehlstelle an der Flanke eines Holzprodukts.

In the following the invention will be explained in more detail with reference to a non-limiting embodiment, which is illustrated in the drawing. In this shows schematically:

• Fig. 1 a perspective view of the top of a first variant of the Holzflickteils invention,
• Fig. 2 a perspective view of the underside of a first variant of the Holzflickteils invention,
• Fig. 3 a first perspective view of the Holzflickteils Fig. 1 and Fig. 2 at a patch to be repaired on the edge of a wood product,
• Fig. 4 a second perspective view of the Holzflickteils on the patch to be repaired,
• Fig. 5A a first side view of the first variant of the Holzflickteils invention in the longitudinal direction of the Holzflickteils,
• Fig. 5B a second side view of the first variant of the Holzflickteils invention in the longitudinal direction of the Holzflickteils,
• Fig. 6A a first side view of a second variant of the Holzflickteils invention in the longitudinal direction of the Holzflickteils,
• Fig. 6B a second side view of a second variant of the Holzflickteils invention in the longitudinal direction of the Holzflickteils,
• Fig. 7 a longitudinal view of the Holzflickteils invention,
• Fig. 8 a sectional view (AA) of a Holzflickteils according to the first variant when inserting in a defect at the edge of a wood product,
• Fig. 9A a sectional view (AA) of a Holzflickteils according to the second variant according to Fig. 6A when inserted into a flaw on the flank of a wood product, and
• Fig. 9B a sectional view (AA) of a Holzflickteils according to the second variant according to Fig. 6B when inserted into a defect on the flank of a wood product.

Fig. 1 and 2 show a first variant of the invention Holzflickteils 1 for repairing defects in wooden components 2, which are arranged in the edge region of wood components 2 are. The second variant, which is described below, serves to repair flaws in the flank.

The Holzflickteil 1 according to Fig. 1 and Fig. 2 has on the bottom 3 a designed as a groove 4 bung connection element with a substantially rectangular cross-section. The groove 4 extends in the longitudinal direction L of the Holzflickteils 1. The top 5 has a flat first upper side part 51 and a flat second upper side part 52, which are interconnected via a transition region 53.

As well as in FIGS. 5A and 5B As can be clearly seen, the first upper side part 51 and the second upper side part 52 together include a top angle 50, which in the present example is 90 ° - correspondingly, the wood patch part 1 can be used on a rectangular edge of a wooden part 2. The top angle 50 can be chosen arbitrarily in the range between 0 ° and 180 °, depending on how the edge of the wood component 2 to be repaired is executed.

The transition region 53 is designed in the illustrated embodiment as an oblique edge which assumes 45 ° with the first 51 and the second upper side part 52 - seen from the first component 51 135 ° and seen from the second component 52 45 ° or vice versa.

Of course, the transition region 53 may be arbitrary, ie rounded, as a sharp edge, etc. - Preferably, the transition region 53 extends as shown in the embodiment longitudinal direction L of the Holzflickteils 1, or parallel thereto.

The underside 3 is curved outward (see Fig. 7 ), thus moves at one end of the Holzflickteils 1 starting in the longitudinal direction L away from the top 5, takes approximately in the middle of the Holzflickteils 1 a maximum distance to the top 5 and then runs at the other end of the Holzflickteils 1 again with the top 5th together.

The Holzflickteil 1 for the edge is shown here in two variants. In addition to the described variant of Fig. 5A where the bottom 3 passes substantially directly into the first 51 and the second top portion 52, shows Fig. 5B a second variant: In this variant, there is a first flank region 81 between the lower side 3 and the first upper side part 51 and a second flank region 82 between the lower side 3 and the second upper side part 52. The first 81 and the second flank region 82 in each case run perpendicular to Bottom 3 - ie the flank angle 80 (see FIGS. 5B and 8 ) is 90 °. Only the flank angle 80 between the underside 3 and the second upper side part 52 is indicated here, but the same is of course also valid for the angle to the first upper side part 51.

In principle, only such a flank region can be provided and the transition underside-upper side part on the other side run directly.

All variants have in common that the groove 4 has a substantially rectangular cross-section, which may be slightly trapezoidal (ie converging in the direction of the bottom 3 away) in order to strengthen the self-clamping.

For introducing the Holzflickteils 1 a recess 6 is milled at the defect in the timber member 2, which is adapted to receive the Holzflickteil 1 selbstklemmend.

According to FIG. 3 and FIG. 4 For this purpose, a correspondingly corresponding bung connection element is executed in the recess 6, which is manufactured in the present embodiment as a spring 7.

Thus, a bung connection is thus realized, where the substantially rectangular groove 4 of the Holzflickteils 1 the milled into the recess 6 projection - the spring 7 - receives. The connection is thus made by the groove 4. This compound is self-clamping due to the geometric design, the remaining bottom 3 of the wood patch part 1 must therefore not be designed specifically. Due to this geometry, the smallest possible depth of the wood patch part ensures the greatest possible coverage (area) at the edge. Thus, the weakening of the cross section of the wood component 2 to be repaired is minimized. Only through the central tongue and groove connection and the flank geometry of the Holzflickteils 1, this low milling depth is possible.

The Holzflickteil 1 can be introduced after milling and the application of an adhesive simply by tapping into the recess 6. After knocking the Holzflickteil 1 stuck geometrically in the recess 6 and it can be done directly by further processing of the timber member 2 by planing, grinding or the like.

Compared to known solutions, the invention Holzflickteil 1 has the advantage that it fits better through its toothless shape in the structure of the underlying wood. When properly installed, the wood patch part 1 is hardly recognizable. The run as a groove 4 bung connection element has in addition to the clamping effect the further advantage that it can be performed running in the region of the 45 ° bevel of the wood running, so it visually hardly recognizable. The advantage of the invention Holzflickteils 1 is therefore also in the better look. With proper installation of the patch part this is hardly or very difficult to see in the overall picture of the wooden part 2. Especially for wood components used as a visual quality, the user gains a corresponding market or even price advantage.

FIGS. 6A and 6B show in side view (or view in the longitudinal direction L), the second variant of the invention Holzflickteils 1, which can be used to repair defects in the edge of timber components 2. Accordingly, the Holzflickteil 1 has a continuous planar upper side 5, the underside 3 is again designed correspondingly curved and has a groove 4. Fig. 6A shows a variant that is curved only along the longitudinal direction L, while Fig. 6B shows a variant which is also curved in a direction normal to the longitudinal direction L, which essentially leads to a shape as in a rotational body.

Fig. 7 shows a longitudinal view of a Holzflickteils 1 according to the invention, ie a view in a direction normal to the longitudinal direction L. The radius R of the curvature is for example 60mm, but may be different depending on the application. Radius R and execution of the bung connection elements cause the Selbstklemmung the Holzflickteils. 1

The Figures 8, 9A and 9B each show the first ( Fig. 8 ) and second variant ( Figs. 9A and 9B ) of the invention Holzflickteils 1 in cross section along the line AA in Fig. 7 when installed in a recess 6 of a wooden component 2. The groove 4 in the Holzflickteil 1 acts in each case with the spring 7 in the timber member 2 together.

Fig. 8 shows the first variant according to Fig. 5B during installation - according to the recess 6 is milled so that a Ausnehmungsflankenwinkel 60 is provided by about 90 °, so that a good, self-clamping effect with the flank portions 81, 82 of the Holzflickteils 1 is ensured. This self-clamping effect is also ensured by the fact that the width of the bottom U of Holzflickteils (see Fig. 5B ) is made slightly larger than the width of the recess F - width here is understood in each case the extent in a direction normal to the longitudinal direction L of the Holzflickteils 1 (and accordingly also the recess 6). The fact that so that the width of the Holzflickteils 1 is slightly larger than the width of the recess 6, must be tapped for mounting the Holzflickteil 1 with a hammer in the recess 6, but then holds both through the groove 4 and the clamping action of the flank portions 81st , 82 with the recess 6.

It should be noted that the clamping action of the Holzflickteils according to Fig. 5A only through the groove 4, which leaves greater freedom in the design of the bottom 3 and the recess.

Fig. 9A shows the Holzflickteil 1 for the flank according to Fig. 6A - Again, the width of the bottom U (see Fig. 6A ) selected to be slightly larger than the width of the recess F, so that an additional clamping effect is achieved. Fig. 9B shows the variant according to Fig. 6B where the groove 4 ensures the clamping action.

In the system according to the invention the Holzflickteil 1 is thus held substantially by a central groove-and-groove milling. This results in a uniform binder surface, in which no teeth are visible. With a sophisticated flank construction the Holzflickteil 1 remains stuck after a hammer blow in the glue carrier and can be reworked immediately. It does not matter whether the spot to be repaired is on the flank or on the edge. The patch according to the invention serves as a solution for both errors.

As already mentioned, the connection can, of course, also be reversed, ie the groove in the wooden component 2 is made and the Holzflickteil 1 has the spring - in principle, it is also possible that the Holzflickteil 1 has several, even different bung connection elements and in the recess 6 of the timber component 2, the corresponding number of corresponding bung connection elements is milled.

A method according to the invention for repairing defects in wooden components thus comprises a first step of milling out a recess with a bung connection element at the defect in the wooden component and inserting a wood patch part with a correspondingly corresponding bung connection element. For example, the bung connection element in the recess is designed as a spring 7 and the bung connection element of the Holzflickteils 1 as a groove 4, or vice versa. The attachment can be supported by coating the recess and / or the bottom 3 of the Holzflickteils 1 with glue or other adhesive.

REFERENCE NUMBERS

1

Wood Flick part

2

timber member

3

bottom

4

groove

5

top

50

Top angle

51

first upper part

52

second upper part

53

Transition area

6

recess

60

Ausnehmungsflankenwinkel

7

feather

80

flank angle

81

first flank area

82

second flank area

F

Wide recess

L

Longitudinal direction (of the wood patch)

R

Radius (the curvature)

U

Wide bottom

Claims (12)

Holzflickteil (1) for repairing defects in wood components (2), which Holzflickteil (1) in a executed at the location of the defect, the shape of the Holzflickteils (1) corresponding recess (6) in the wooden part (2) can be used, the Holzflickteil (1) has a flat upper side (5) and a lower side (3) with outwardly curved contour, characterized in that on the underside (3) at least one in the longitudinal direction (L) of the Holzflickteils (1) extending bung connection element with substantially rectangular Cross section is provided. Holzflickteil (1) according to claim 1, characterized in that it is the bung connection element is a groove (4) or a spring which is adapted to a in the recess (6) in the timber member (2) arranged corresponding bung connection element, which is designed as a spring (7) or groove, self-locking cooperate. Holzflickteil (1) according to claim 1 or 2, characterized in that the curvature of the underside (3) along the longitudinal direction (L) of the Holzflickteils (1). Holzflickteil (1) according to any one of the preceding claims, characterized in that the underside (3) has a radius of curvature (R) of 60 mm. Holzflickteil (1) according to any one of the preceding claims, characterized in that the upper side (5) has a first planar upper side part (51) and a second planar upper side part (52) which are interconnected via a transition region (53), wherein the first Upper part (51) and the second upper side part (52) together include a top angle (50) smaller than 180 °. Holzflickteil (1) according to claim 5, characterized in that the upper side angle (50) between the first (51) and the second upper side part (52) is 90 °. Holzflickteil (51) according to claim 5 or 6, characterized in that the transition region (53) parallel to the longitudinal direction (L) of the Holzflickteils (1). Holzflickteil (1) according to one of claims 5 to 7, characterized in that the transition region (53) is designed as an edge. Holzflickteil (1) according to any one of claims 5 to 8, characterized in that between the underside (3) and the first upper side part (51) is a first flank region (81) and / or that between the bottom (3) and the second upper side part (52) is a second flank region (82), wherein the first (81) and the second flank region (82) in each case perpendicular to the underside (3). Holzflickteil (1) according to any one of claims 5 to 9, characterized in that bung connection element and transition region (53) in the region of the 45 ° bevel of the Holzflickteils (1) are executed. Method for repairing defects in wooden components (2), characterized by the following steps: a) milling a recess (6) with a bung connection element in the timber component (2) at the defect; b) inserting a Holzflickteils (1) according to one of claims 1 to 10. A method according to claim 11, characterized in that the bung connection element in the recess (6) as a groove or tongue (7) is executed and the Holzflickteil (1) has a corresponding tongue or groove (4).

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