FI12756Y1 - Laminated log - Google Patents

Abstract

A slat timber (100) having on its opposite sides a first and a second side slat (110) each having an inner side (112), characterized in that said first and / or second side slats (110) have an inner side (110) 112) is provided with one or more grooves (150) extending in the longitudinal direction of the lamella (100) to guide the dry cracking of the side lamella (110) to the inner side (112) in question. In addition, the protection requirements 2-8.

Description

LAMEL LOG

TECHNICAL FIELD The invention relates to a lamellar log. In a particular embodiment, the invention relates to a cross-glued square lamella log.

BACKGROUND Lamella logs are a popular building material as they enable high-quality solid wood wall construction. However, applications using lamella log also suffer from problems, including cracking of wood material.

PURPOSE The purpose is to eliminate or at least alleviate all or part of the above disadvantages. The specific purpose is to bring out a lamellar log whose cracking can be controlled. It is a further object of the invention to provide a lamellar log in which cracking can be controlled cost-effectively.

o SUMMARY

N <The lamella log comprises, on its opposite sides, a first N and a second side lamella, each with an inner N side. The first and second side lamellae can thus be arranged on opposite sides E of the lamella log so that their outer side forms part of the corresponding outer side of the lamella S log and the inner side rests inside the lamella log. The inner side of said first and / or second side lamella comprises one or more grooves extending in the longitudinal direction of the lamella log.

to control the drying cracking of its side lamella on said inner side. In this way, the drying cracking of the outer sides of the side lamella in question can be significantly reduced. The groove allows the drying cracking of the side lamella to be guided into that groove. Any cracks that may arise in this way can be made to remain inside the lamella log, in which case it is also hidden when viewed from outside the lamella log. In one embodiment, said one or more grooves are a planing groove. This makes it possible to shape the groove into a linear part of the lamella log structure. The planing groove can be formed efficiently in the planing step of the lamellar log.

In one embodiment, all the grooves of said first and / or second side lamella for guiding the drying crack on the inner side of said side lamella are at a depth of at most one third of the width of the respective side lamella. This allows the side lamella to be arranged to receive bending forces. This has a particular effect on square cross-glued lamella logs, where one or more transverse intermediate lamellae can be arranged to receive compressive forces and the side lamellae can be arranged to receive bending forces. Limiting the depth of the grooves allows a closed support of the side lamella formed at the height of the side lamella to the depth end of the groove, which prevents the N lamella logs, and for example the wall structure made therefrom, from breaking under the effect of bending forces. In one embodiment, the first and / or second side lamella S comprises two or more overlapping grooves S35 for guiding the drying crack S of said side lamella to the inner side of said side lamella. This allows> effective control of the drying crack inside the lamella log. By increasing the number of overlapping grooves, the need to deepen the grooves can also be reduced, which enables enhanced reception of bending forces in square cross-glued lamella logs. In one embodiment, the lamella log comprises four or more of said overlapping grooves, for example at least eight overlapping grooves. In a particular embodiment, said overlapping grooves are of the same depth relative to each other. This makes it possible to smooth out the bending forces in the side lamella and thus increase the bending capacity. In one embodiment, said one or more grooves are rectangular, triangular, trapezoidal or parallelepiped in shape. With these cross-sectional shapes, it is possible to enhance the control of the drying crack. In one embodiment, said one or more grooves have an air space, which may be a closed space. In addition to the anti-cracking property of the groove, the thermal insulation capacity of the lamella log can be increased in the air space. The air space can naturally be formed at the depth end of the groove. In another embodiment, said one or more grooves are substantially filled with a medium such as an adhesive. The groove can be filled with glue, for example as a result of the attachment of the side lamella. The size of the air space can be adjusted, for example, by adjusting the depth and / or shape of the groove.

N S 30 In one embodiment, the lamellar log is a cross-glued N lamella log having one or more transverse intermediate lamellae between said first and second side lamellae in the width direction of the lamella log. Said one or more grooves can then abut the lamella in the transverse direction. 8

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In a sharp embodiment, the lamella log is a square cross-glued lamella log. In such a lamella log, the side lamella is square and the said grooves therein can effectively control the drying cracking away from the outer side of the side lamella, but at the same time maintaining the bending capacity required for the side lamella and thus the lamella log wall structure. In a straight embodiment, the lamella log comprises at least two side lamellae arranged one on top of the other in the height direction of the lamella log. This makes it possible to increase the pitch of the lamella log, although the strength of the raw wood used in one side lamella is limited. In such a solution, one or more grooves mentioned in some embodiments may be lateral with respect to the seam between the overlapping side lamellae. In this case, many of said grooves can also be produced in a straight line in one lamella log or side lamella, for example as a planing groove.

In the case, the pitch of the lamella log is 26 cm or more. Such high-pitch lamella logs have a large uniform log side surface and can have a significant effect in crack control. This allows the production of higher pitch lamella logs, including lamella logs with a pitch of 40-45 cm or more. By increasing the rise height N, it is possible to produce a lamella log significantly cheaper and the structure to be formed from such lamella logs 30 faster than installed.

S Ek In a lamella log, two or more lamellae can be * arranged in the width direction of the lamella log. The height direction of the lamella log S is then perpendicular to the longitudinal direction and the width direction of the lamella log S 35. Overlap- N can mean an overlap with a lamella log.

in the height of the inside of the inner and / or side lamella, in particular with reference to said grooves. 5 BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in detail by means of application examples with reference to the accompanying drawing, in which Figure 1 shows a lamellar log structure comprising an example of a lamellar log. Corresponding reference numbers refer to the same or at least structurally and / or functionally similar objects, whether or not the reference number is followed by a letter.

DETAILED DESCRIPTION The following detailed description is provided in conjunction with the drawing to illustrate possible exemplary embodiments. It is not intended to describe the only forms in which the examples may be implemented or utilized. The same or similar functionalities and structures can also be implemented with other examples. o Figure 1 shows a lamella log structure 10, such as a lamella log wall, comprising an example of a lamella log 100.

N N The lamella log 100 is shown in the figure in a plane perpendicular to its cross-section = 30 na perpendicular to its longitudinal direction. The height direction 140 and the width direction 142 E of the lamella log 100 are indicated in the figure. The seam 160 extending to the width of the lamella log shown in Figure 1 is optional,

O 5 wherein the seamless image shows a single layer lamella N 35 log and the seamless image shows a layered lamella S 35 log.

The lamella log 100 comprises two or more lamellae 110, 122, for example 3-5 lamellae or more, in a row in the width direction 142 of the lamella log 100. The lamellae 110, 122 may be attached to each other by adhesive attachment. The lamella log 100 may also comprise lamellae in only one layer, but alternatively also in two or more layers. In this case, the lamellae 110a, 122a of the upper layer can align with the lamellae 110b, 122b of the lower layer. The layers can be attached to each other by adhesive bonding. The two-layer lamella log 100 may have, for example, 3-5 lamellae in each layer, in which case the lamella log has a total of 6-10 lamellae. A seam 160 is formed between the overlapping layers, which may be an adhesive seam. The adhesive seam may extend in the width direction 142 of the lamella log 100 to all adjacent lamellae to provide adhesive bonding between the overlapping layers.

The lamella log 100 may comprise one or more longitudinal lamellae in which the grain direction of the wood material is in the longitudinal direction of the lamella and thus also of the lamella log 100. The lamella log 100 may also comprise one or more transverse lamellae 122, where the autumn direction of the wood material is in the height direction 140 of the lamella and thus also of the lamella log 100. In particular, the lamella log 100 may be a cross-glued lamella N log comprising one or more longitudinal lamellas. and one or more transverse lamellae 122. In one embodiment, the lamella log 100 comprises a transverse lamella Ek 122 having one or more lamellas S in the width direction 142 of each side of the lamella log. The transverse lamella 122 can act as a load-bearing structure S 35, in which case the lamella log S can also be called a non-depressed lamella log in the technical language. In one implementation, 100 lamella logs

in the direction 142, the outermost lamellae 110 are longitudinal lamellae, which may be interposed by one or more other lamellae, which may comprise one or more transverse lamellae 122. The outermost lamellae 110 may also be referred to herein as side lamellae.

According to the example of Figure 1, the lamella log 100 may be a square lamella log.

In a square lamella log, the side surface 130 of the lamella log 100 is substantially flat, i.e. with a straight profile.

This typically applies to both sides of the lamella log.

Respectively, the sides of the side and / or intermediate lamellae 110, 122 may be flat, i.e. with a straight profile.

The lamellae can then be substantially rectangular in shape.

The lamella log 100 may be several meters in length, for example 1.5-12 meters.

The same applies to the individual lamellae of the lamella log 100.

The longitudinal direction of the lamella may consist of a single solid piece of wood.

The transverse lamella 122 may consist of a plurality of pieces of wood arranged in a queue shape.

In one embodiment, the pitch of the lamella log 100 may be 26 cm or more, for example at least 40 or 45 centimeters.

The pitch of the lamella log 100 may substantially correspond to the height N of the side surface 130 and / or the inner side 112. The lamella log 100 comprises two side surfaces 130 which are on opposite sides in the width direction z 142 of the log relative to each other.

The side surface 130 can thus form the side of the lamella log 100.

The side surface 130 forms the outer surface S of the lamella log 100, which as the exposed surface S 35 can be visible in whole or in part in the structure S comprising the lamella log and thus also exposed to the environment.

One or both side surfaces 130 may be substantially in the height direction 140 of the lamella log 130, but other shapes and orientations are also possible. The lamella log 100 also has an upper surface 132 and a lower surface 134, which may have one or more tongues 136, 138 for positioning the two overlapping lamella logs 100 relative to each other. The upper surface 132 may comprise, for example, one or more male tongues 136. The lower surface 134 may comprise, for example, one or more female tongues 138.

Two or more of the two or more lamellae of the lamella log 100 are side lamellae 110 which abut the sides of the lamella log 100. Thus, each side surface 130 of the lamella log 100 may be formed of one or more side lamellae 110. The first and second side lamellae 110 abut on opposite sides of the lamella log 100. The side lamellae 110 may be in one or more layers in the height direction 140 of the lamella log 100. Thus, the lamella log may overlap one or more first / second side lamellae 110. In a particular embodiment, the side lamellae 110 are in two layers. The side lamellae 110 on one or both side surfaces of the lamella log may be longitudinally parallel. In this case in particular, but also in other cases, the core side of the wood material in the side lamella 110 may be on the outer surface of the lamella log 100. In the width direction 142 of the lamella log 100, between the side lamellae 110, there may be one or more lamellae, which may be referred to as intermediate lamellae. In one embodiment, the intermediate lamella S 30 is one or more transverse lamellae N 122 and possibly one or more horizontal lamellae. a S The first and / or second side lamella 110 may be of S 35 solid wood material. The same applies to one or more intermediate lamellae. Thus,> the lamella log 100 may be of solid wood material

of wood. The lamella log 100 or any of its lamella 110, 122, such as the side lamella 110, may be any wood grade suitable for a conventional lamella log, for example spruce or pine.

The first and second side lamellae 110 each have an inner side 112, which is a side of the side lamella 110 extending inside the lamella log 100. It may abut the intermediate lamella, such as the transverse lamella 122. The inner side 112 may be flat, i.e. substantially straight in profile. It can be planed. The inner side 112 may extend substantially longitudinally and / or vertically of the lamella log 100. The inner sides 112 of the first and second side lamella 110 may be parallel. Between them there may be one or more intermediate lamellae, which may comprise one or more transverse lamellae 122. Said one or more intermediate lamellae may also comprise one or more longitudinal lamellae.

At least one of the inner sides 112, but possibly both, comprises one or more grooves 150 (here also "said grooves" or "grooves") for guiding the drying cracking of the respective side lamella 110 on said inner side 112 and said grooves 150. Drying cracking can thus be guide the full length of the lamella log 100. Said grooves 150 may be tap-n pour. The inner side 112 may extend on both sides of said grooves 150 N in the height direction 140 of the lamella log. S 30 Said grooves 150 may be substantially in the longitudinal direction of the lamella log N 100. They can extend in the longitudinal direction of the lamella log 100 over substantially the entire length of the lamella log 100. To control the drying crack S of the side lamella 110, they may define a line extending substantially the entire length S 35 of the lamella log 100, or may continue uniformly over substantially the entire length of the lamella log 100. Said grooves 150 may be substantially even in depth and / or height along their entire length.

The location of said grooves 150 in the height direction 140 of the side surface 130 may vary.

Said grooves 150, or at least one or more of them, can thus be located, for example, in the side lamella 110 or at the joint 160 of the two side lamellae 110a, 110b. In some embodiments, controlled cracking can be achieved particularly effectively, as it has been found that cracking can often occur in the vicinity of the seam.

In addition, when the core wood 110 is on the surface in the side lamella 110, the greatest internal stress may form in the vicinity of the joint due to the shrinkage of the wood in its strongest shrinkage direction as the wood dries.

For logs, this strongest shrinkage direction is typically a direction perpendicular to the radius of the wood material, such as a log support, where the shrinkage can be significantly stronger than in the radial direction and especially in the longitudinal direction of the wood material.

However, in particular said grooves 150, or at least one or more of them, may also be located at a distance from the seam.

When all said grooves 150 are thus located, a single side lamella 110 can be made in a straight line with similar grooves 150. Said line and said grooves 150 may be substantially straight, in particular they may be substantially straight.

straight in the longitudinal direction of the lamella log 100.

In one embodiment, the inner side 112 of the first and / or second side lamella 110 has two or more grooved lines S30 for controlling the drying cracking of the side lamella 110 to the inner side 112, z of said side lamella 110, which line may extend substantially the entire length of the lamella log.

The lines may overlap in the vertical direction 140 of the lamella S of the lamella 100. The grooves 150 of S 35 mentioned on the line may continue to be uniform over the entire length of the lamella 100.

The lines can be separate, i.e. they do not intersect with the length of the lamella log 100. The lines can be parallel. In one implementation, there are four or more lines on one inner side 112. In one embodiment, the lamella log 100 comprises two or more side lamellae 110 on top of each other, wherein the lamella log 100 may comprise a double or more number of overlapping lines in its vertical direction 140. In one implementation, there are eight or more lines on top of each other in the vertical direction 140 of the lamella log 100. The grooves 150 corresponding to the overlapping lines may be of the same depth and / or height, but may also differ from each other. This applies in particular to the height-adjacent grooves 150, i.e. the adjacent grooves. In particular, all the overlapping grooves 150 of the first and / or second side lamella 110 may be of the same depth and / or height relative to each other. The grooves 150 corresponding to the overlapping lines may be of the same shape, which facilitates the smooth control of the drying crack, but they may also be of different shapes. In one implementation, the overlapping lines in the first and / or second side lamella 110 are evenly spaced. In particular, said grooves 150 may comprise first, second and third grooves which overlap with each other and where the distance between the first and second grooves corresponds to the distance between the second and third grooves. Overlapping lines may also be at unequal intervals to form said grooves 150. In this way, cracking can be targeted in the event that only certain points of the N lamella logs 100 need grooves to guide the drying beam. Said grooves 150 can then be placed S only at these points.

In a fringe embodiment, said grooves 150 are at a depth of one third or less than the width of the corresponding side lamella 110 S35. This applies to all the grooves 150 of said side lamella S to guide the drying crack of said side lamella to the inner side of said side lamella,

the resilience of the bending forces of the side lamella 100 can be significantly improved.

In one embodiment, said grooves 150 are at least 3, 4 or 5 mm deep, regardless of the width of the side lamella 110.

In one embodiment, said grooves 150 are at most 12, 15 mm or 20 mm deep, regardless of the width of the side lamella.

In a particular embodiment, said grooves 150 are 5-12 mm deep, regardless of the width of the side lamella 110.

Between the outer surface of the side lamella 110 and the depth end of said grooves 150 in said side lamella, the side lamella 110 may be of a substantially uniform wood material with no significant structural weaknesses.

Said grooves 150 may be filled or air space may be left in them.

In particular, the latter alternative can be used to improve the thermal insulation capacity of the lamella log 100.

An air space may be formed at the depth end of said grooves 150.

In one embodiment, the air space has a depth of 5-10 millimeters or more.

All the grooves 150 of the first and / or second side lamella for guiding the drying crack of said side lamella on the inner side of said side lamella may be filled or spatially.

The air space can extend over substantially the entire length of the lamella log 100, either continuously or intermittently.

The airspace may be an enclosed space.

In one embodiment, said grooves 150 may have a depth of at least 1 cm, which may also allow air space to be formed therein N in typical cases where the inner side 112 is glued to another lamella, such as an inner lamella.

S 30 Said grooves 150 may be planing grooves.

They can N be planed into the lamellae already at the stage of manufacturing the lamella log 100, in particular at the planing stage * of the lamella log 100, in addition to other planing of the surface.

In one embodiment S, said grooves 150 may be at least S 35 2 or 3 mm in height.

In one embodiment, said grooves 150 N may have a maximum height of 6, 8 or 10 mm.

In a particular embodiment, said grooves 150 are 3-6 mm high.

Said grooves 150 may be in the form of, for example, rectangles, triangles or oblique rectangles. In one embodiment, the shape is trapezoidal or parallelepiped. In a straight embodiment, the shape is a rectangle which may have a short or long side substantially in the width direction 142 of the lamella log 100. The above shapes may be defined as cross-sectional shapes in a plane perpendicular to the longitudinal direction of the lamella log 100. In all these embodiments, said grooves 150 can be directed in the width direction of the lamella log 100 directly or obliquely upwards or downwards in the height direction 140 of the lamella log 100, towards the upper surface 132 of the lamella log. In this way, possible cracks can be effectively controlled. When the inner sides 112 of both side lamellae of the lamella log 100 are grooved in the grooves 150 to guide the drying cracking of the side lamellae on the inner side of the side lamellae, said grooves on the different inner sides 112 may be the same or different and may be selected according to the application. The lamella logs 100 can be formed into various lamella log structures, such as lamella log buildings or parts thereof. The lamella log structure can be, for example, a lamella log house or a lamella log wall. It comprises N one or more lamella logs 100, which N can typically be mounted horizontally S 30 horizontally. The upper surface 132 of the lamella log 100 then settles N upwards and the lower surface 134 downwards. The side surface of the lamella log structure may then correspond to the side surface 130 of said one or more lamella logs 100. The lamella log structure may have a height of, for example, S 35 1-3 meters or more. It may comprise two or more lamella logs 100 on top of each other, for example 5-10> or more lamella logs 100 on top of each other, so that the side lamellae 110 of the overlapping lamella logs abut on the side of the lamella log structure, forming a side surface on the lamella log structure. The side surface of the lamella log structure may be planar, but it may follow the surface shapes of the lamella logs 100, so other shapes are possible. In one embodiment, the side surface of the lamella log structure is straight, such as vertical, i.e. in the height direction 140 of said one or more lamella logs 100. In the lamella log structure, the lamella logs 100 may be substantially horizontal in their longitudinal direction. Likewise, in a lamella log structure, the lamella logs 100 may be substantially vertical in height direction 140.

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

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Claims (8)

PROTECTIVE REQUIREMENTS A slat timber (100) having on its opposite sides a first and a second side slat (110) each having an inner side (112), characterized in that said first and / or second side slats (110) have an inner side (110) 112) is provided with one or more latches (150) extending in the longitudinal direction of the lamella timber (100) to guide the dry cracking of the side lamella (110) in question to the inner side (112) in question. Slat timber (100) according to claim 1, wherein said one or more rafters (150) are a planed rafters. Slatted timber (100) according to protection claim 1 or 2, wherein said first and / or second side slats (110) all latches (150) for guiding the dry cracking to the inner side (112) of the side slat (110) in question to a depth not exceeding part of the width of each side lamella (110). A slat timber (100) according to any one of the protection claims 1-3, wherein the first and / or the second side slat (110) has two or more rafters (150) one above the other to direct the dry cracking of the side slat in question to the inner side of the side slat in question. o 5. Slatted timber (100) according to protection requirement 4, wherein S said above-made rafters (150) are equal to A deep with each other. = 30 6. Slatted timber (100) according to any one of the protection requirements 1- A 5, wherein its construction height is 26 cm or more. E 7. Slatted timber (100) according to any one of the protection claims 1- LO 6, wherein said one or more grooves (150) therein = have an air space for increasing the thermal insulation capacity of the slatted timber (100). N D A slatted timber (100) according to any one of claims 1-7, wherein it is an angular cross-glued slatted timber. oO N O N © <Q N I a a LO o 5 O N O N D