FI117483B - Timber jointing method especially for corners of light log buildings presses notches 1-2 mm deep in the sides of logs and simultaneously cuts notches in the top and bottom surfaces so logs can be stacked as corner joint - Google Patents

Abstract

Light logs typically 28-55 mm diameter have notches pressed (23 & 25) into each side that are between 1-2 mm (1.2-1.5 mm) deep across the log. Saw cuts (4 & 5) are made on the top and bottom surfaces of the logs and blocks of wood (6) removed by a cutting blade preferably advanced as the side notches are pressed. The logs are arranged crosswise on each other the cut notches pressing first into each other and then into the pressed notches. An independent claim is also included for the machine to make the notches.

Description

1,; 117483

Method and apparatus for making a log joint

Field of the Invention

The present invention relates to a method for making a log joint according to the preamble of claim 1. The invention also relates to a device according to the preamble of claim 5 for making such a log joint. This type of log joint is particularly applicable to the construction of holiday homes and cold or semi-cold buildings, all of which are made of so-called lightweight logs.

BACKGROUND OF THE INVENTION It can be said that log buildings have always been made by joining logs in the corners of a building with different corner laths. In order to prevent wind and rain from penetrating the structures, the most commonly used latch is called the so-called cross corner. Such a latch consists of four sides carved, planed, milled or sawn and joined to one another at its junction. With this latch, a sturdy and fairly tight corner joint is achieved.

One method of manufacturing a corner liner is disclosed in US 2,712,678, where efforts have been made to increase the tightness of the log corner by compressing the outer corner structures of the latch slats against each other when assembling the latch.

The deformation obtained during the assembly of the sheet is intended to cause a subsequent straightening of the wood fibers, such that the corner sheet, py -: \, t, would be compact despite the shrinkage due to the drying of the logs. Salvos; however, it is difficult to assemble requiring great forces when squeezing the logs together.

/ This kind of wood modification during the assembly of the lining is also likely to * * · · '·' 25 damage the log joint both visually and structurally.

* * * * · .. * Although the traditional cross corner is simpler to manufacture, it requires considerable skill, time and space to make. It is particularly problematic to make such a corner liner when using a so-called lightweight iron. Such light logs are very narrow carved logs. · [·. 30, often only 28 - 55 mm thick. These light logs are often made into relatively simple summer or storage buildings. Even narrowing the side surfaces of this lighthouse f * · V: at the latch would significantly weaken the structure and, consequently, the building | its strength, which makes the corners of the cross in its best form rarely applicable in the construction of light logs. So the corners of such buildings are

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·· 'i,> 2 117483 to be separately summarized for example by listing. Another option is, of course, to accept leakage points in the corners of the building. This is less important in warehouse buildings, but in the case of residential buildings, they are required to have a relatively high degree of tightness and the 5 sound insulation they bring.

On the other hand, woodworking methods are known in which wetted or wetted wood is simultaneously processed by pressing and drying. Wood shaped in this way has been used, for example, in the shipbuilding and furniture industries. In this way, the mechanically modified wood 10 is restored, at least in part, to its original form by wetting the wood again, whereupon the wood is expanded by the action of moisture. Such arrangements are disclosed, for example, in German Patent Publication DE 336 517 and Norwegian Patent Publication No. 34 981. However, the known solutions involve a considerable number of cumbersome work steps which render such a procedure somewhat useless if the aim is to treat large quantities of building components in an inexpensive manner. Such known procedures are also unsuitable for use in the installation of log frame f at its final site.

Further, methods known in US 5,343,913 for improving the strength properties of structurally weak wood are known. The publication '* discloses a method of subjecting a significant deformation of * "ί · * wood to a humid environment under pressure. Wood having a higher strength as the wood material dries can be used for example: * · in the construction industry. However, don changes are not revertable to their original state.

In the present invention, wood is not treated in a humidified • • \ .I # environment.

BRIEF DESCRIPTION OF THE INVENTION *

It is an object of the present invention to substantially reduce ♦ * #,; T

30 deficiencies due to these drawbacks of the prior art. This would provide a completely new solution, which would also be used when constructing a lightweight log. ···. cross-corner technique can be applied.

This object is achieved by the present log connection method having the features defined in the claims according to the present invention. More specifically, there is a method for this invention.

117483 3 is essentially characterized by what is set forth in the characterizing part of claim 1.

Such a log connection is in turn provided by a device having the features defined in the claims according to the present invention.

More specifically, the device according to the invention is essentially characterized by what is stated in the characterizing part of claim 5.

Preferred embodiments of the invention are claimed in the dependent claims.

10 The invention is based on the idea of utilizing the inherent deformation and resilience of wood when making a tray, providing easy size | but a tight but durable corner joint.

Indeed, the welding method of the invention provides several advantages. Thus, the prior art of carving a latch, which required several steps, is accomplished by the present method of pressing the necessary latch cavity on the side surface of a log, accomplished in a few quick and simple steps. However, a strong and tight latch is provided which, due to the shallowness of the pressed cavity, does not in any way weaken even the lightweight bar. -

By utilizing the quick and simple process of the invention, lightweight logs are made into a very affordable and high quality basic log, especially for residential buildings for summer use. However, since the latching angle obtained by the present method is self-compacting over time, it is prevented: * · ". * However, it effectively prevents access of water, snow or creek to structures.

I Thanks to this completely new tightness of the latching corner, a lightweight: · · *: 25 building or part of it can even be curved, insulated and coated to make a winter residence. By utilizing the invention, there is also! ·· '. • it can also be combined with both cold and winter • rooms in an inexpensive way.

. By making the latch by the method of the invention, squeezing the shallow latch recesses necessary for the surfaces of the logs is also avoided as a result of mechanical machining such as planing, milling or carving the logs? : Y: The resulting chip and chip. This significantly enhances the safety of the working environment while avoiding cleaning • · *, * caused by machining and chipping. us, storage and disposal costs. Compression also produces

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*;!; * 35 cooler latch, because pressing prevents the wood surface from cracking ** ·· *.

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When doing all the compression molding of a lightwood salvo, the only waste material resulting from the work consists of small pieces of wood.

Due to their dust-free nature, these blocks are easy to use, for example in a heating pan or fireplace.

It has also been found that the present method of fabricating a corner lining avoids the problems of thickness variations due to the manufacturing tolerances of the log. Thus, the conventional lightweight salvo taper is always made to a specific length. However, since the thickness of the light log varies with the planing tolerance f from a few millimeters to a few millimeters, the latch hole must always be dimensioned according to the maximum log thickness. This, of course, increases the formation of advantageous fractures in the corners. When the present method of making the lath presses the latch slots also on the side surfaces of the log, such slits due to the manufacturing tolerances are self-sealing over time. By squeezing the recesses of the side surfaces so that the soles formed by them are always at a distance from one another, the problems caused by the manufacturing tolerances of the log are completely avoided. At the same time, however, it is ensured that the latch corner is easy to assemble and prevents the latch and wood surface from being broken when the latch is assembled.

Whenever the logs of the log always fit properly with each other, assembly of the 20 corner logs is significantly accelerated. Indeed, experiments have shown that the method according to the invention can save up to 60% of working time compared to traditional logging and construction. |

Since the compact cross-corner lining can be manufactured with less work f and economical savings from the more economical raw material, there are considerable advantages - up to 50% when compared to a structure made of thicker logs manufactured by the method of the invention.

] · · ·. When the tray is made, the removable wood splits off into large pieces, which • · · '% can be more easily utilized, for example, as a burnable raw material. or in pans.

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* ·: · * 30 Since the log needs less mechanical work, I need it

***** * ··· * also smaller workspaces - log latches can even be made: Y: at the assembly site itself. Machines for pressing and * ·: * · *; equipment is also significantly cheaper than the machinery and equipment that • * *. *. for example, log milling.

The latch made in the manner of the invention enables the log to: ··· * have a desiccation due to drying. Nevertheless, the resulting joint is 1 1 7483 5 ξ nevertheless so strong in structure that it can be avoided by nailing.

Also, the device with which the present log joint can be manufactured offers several advantages to the user. Thus, the device can be made simple and durable. Because the log latches are relatively shallow, a relatively low power source is required to provide the required compression power. Such a power source can be operated even with a conventional luminous flux. Thus, the device is easily accessible from place to place.

Simple and small, the device is easy to move, allowing the logs to be handled with minimal effort at the building site itself. If mains power is not available at the installation site, such a low-power device will operate with conventional, easily portable electric generators.

The device is very simple to operate thanks to its few work steps. In addition to the squeegee recesses pressed into the side surfaces of the log, additional blades can be added to the machine, which further simplifies the snap production. Namely, with such additional blades, it is possible to make grooves in the upper and lower surface of the log. Thus, when the notches on the upper and lower surfaces of the log are provided, the removable blocks of wood may have been partially detached during the preparation step by means of a notched saw groove. Due to this pre-fabrication, the removal of a block of wood requires significantly less clamping force than the pressing of a block of wood. ”* · * From intact logs, which is also quite possible. By removing the wood: T: squeezing the logs, the log significantly improves the salvo hole and the

•: * structure of edges, which also improves the quality of the finished log joint. I

• · · · '-if 25 Incompatible with a small simple device

ret - for example, knotted logs on its latching point - is easy to sort and use I

at another site where it is not necessary to seal all of their surfaces | | immediate. *, Current computer-controlled manufacturing lines make it easy to automate the manufacturing of • • · 30 lightweight salvo slots. 3 • · · (/.a Brief Description of the Figures i • · ·.

. ·· * ·. The invention will now be illustrated by reference to certain preferred embodiments of the accompanying drawings, in which: Fig. 1 schematically illustrates a prior art? ··· τ 35 corner joint, i 6 1 1 7483 Fig. 2 shows the provision of a log already sawed from its top and bottom Fig. 3 is a schematic horizontal sectional view of a ready-to-install lightweight log mill, 5 is a schematic horizontal sectional view of a corner sheet made of notched logs according to the invention, Fig. 5 is a side elevation view of at least another embodiment of a log pressing device having a cutting tool fitted with cutting blades, Fig. 7 is a sectional view of a press tool according to an embodiment of Fig. 6, at point AA, wherein the tool has a cutting blade guided to the bottom of the lath block of wood, and Fig. 8 is a sectional view of a pressing tool according to another embodiment of Fig. 6, from A to A, wherein the pressing tool | sa is a cutting blade that completely detaches the lath from a block of log.

Detailed Description of Some Preferred Embodiments

Some preferred embodiments of the welding method, as well as the device used to make it, are described below with reference to the above figures. In this case, the solutions comprise the components designated by the reference numerals ί, which correspond to those used in the following description:. references.

• φ · '«M Φ

Conventionally, the cross corner of Fig. 1 is provided by * ·. $ ..... 25 that intersecting logs are cut on all four surfaces, for example by carving 1 • «log cavities. Subsequent cross-alignment of the logs at these sculpted cavities results in the desired corner lining. Such a corner liner is sufficiently dense in structure to prevent airflow through the built | through the corner - which is why the structure is also called wind-* · · 30 two. If necessary, the latch is caulked to provide the best seal. Making such a tape is not a problem as long as • ·. ···. the log is thick and can thus be carved into the notches of the desired depth without too much loss of strength of the log. f: .i .: For example, when constructing warehouses or mainly M · 35 lined buildings using thin logs, so-called light logs, it has been virtually impossible to cut the vertical side surfaces of the logs. f

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117483 i 7

Notching the vertical surfaces 2 of a thin, typically 28 ... 55 mm thick log would significantly weaken the strength of both the lining and the overall structure. However, failure to make a wind angle results in repeated crevices extending throughout the wall structure, which in some cases create an unpleasant pull. In the worst case, these gaps can penetrate water or snow into structures during rainfall.

The present method of joining logs is particularly suitable for use carved or planed logs. A particularly advantageous method of joining 10 is when applied to making a cross-corner of a lightweight building. Such logs are conventionally made especially for summer homes and cold or semi-cold storage buildings.

The log connection is achieved as shown in Figures 2-4 by firstly sawing grooves 4 and 5 on opposite sides 2 and bottom 3 of log 1 to be fitted into the latch. These saw grooves are opposite, perpendicular and parallel to the log surfaces and have at least two surfaces. for. The log portion 6 between these parallel saws is removed, thereby providing first opposed recesses or notches 7 and 8 on the top and bottom surfaces of the log. The dry log to be treated 20 is then inserted into a device for dislodging the recesses, i.e. opposite side surfaces 9 and 10. parallel cavities or lo - .. li * vet 11. These cavities are preferably wedge-shaped towards the bottom of the cavity>: T: tapering. The holes are only 1 ... 2 mm deep, most preferably: 1.2 ... 1.5 mm. ^ • · · · ·: ··· 25 Logs according to Fig. 3, formed in the manner described above, 1: -. 4, with the notches 7 and 8 provided therein and! ··. cavities 11 connect to each other like a jigsaw puzzle, allowing overlapping logs to join upper and lower surfaces 2 and 3. On the side surfaces 9 and 10 of the log. through the recesses 11 extending from the surface level of the side surface to the log, the logs - • · · * ;;; * 30 are as if protruding into the notches of the intersecting log between them. ; * *. '.

The groove widths defined by the saw grooves 4 and 5 are then smaller than the distance between the logs: V: the joint surfaces 9 and 10, thereby providing a *** · sealed corner lining such as that shown in Fig. 1.

• · ·. *. According to a particular embodiment, the pips in the recesses 11 are always arranged to be equally spaced. How to compensate • · • »

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8 'ί Dimensional deviations due to log manufacturing tolerances, without having to work at all on the upper and lower surface notches 7 and 8.

According to the present method, the log 1, which has been dry-pressed or dried to room humidity, returns over time to at least partially its original shape at the recesses 11 provided on the side surfaces 9 and 10. Due to the small deformation of the wood, such creep of the wood towards its original shape occurs without any external intervention. In this way, the bottom of the cavity rising towards the original side surface of the log, during its deformation, meets the vertical surfaces of the saw grooves 4 and 5 of the upper surface 2 and / or the lower surface 3 10 in the notches 7 and / or 8. In this way, the corner lining appears to grow to over-tighten, further tightening and stiffening. Thanks to this reversible deformation, the joint can be made without supporting nailing, which improves its durability and substantially reduces the performance required. Because the top and bottom grooves of the logs are initially relatively loose due to the deformation of the side surfaces 15, the corner lining is quick and simple to assemble when required to force fewer log grooves into the nested position. This also avoids the at least partial breakage of the otherwise conventional patch. Also, since the grooves on the side surfaces 9 and 10 do not require any mechanical machining of the log 20, making the latches easier. The carving of latches results in fewer cuts and chips than before, which essentially f improves occupational safety and reduces the need for work space to store construction waste. By increasing the clamping force, the final irreversible deformation of the notch on the side surface of the log can be added by partially breaking the wood's bony structure.

· *. *. The notch 11 obtained by compression is preferably shaped, for example, * • · <*. · * ·. wedge-tapered in its downward-facing position in its operating position. As the latch dries and expands, it squeezes the corners of the cross firmly toward the base of the building, stiffening the structure of the corner. Like this ]

* ;;; 30 may be dispensed with nailing or spiraling otherwise frequently used in the corner

* ·; · * From the tango. The cross-corner thus becomes more naturally alive under humidity conditions and at a lower cost in manufacturing. ,

Because the present latching method provides a normal corner lining, it also allows structures to settle in a conventional manner.

35 However, the corner lining is tight enough for any further corner sealing; * ··· * it might not be needed in the form of a tag or bulletin. By tracing the recesses 21 in the side surfaces 9 and 10 of the log 1 into the recess pressing device 20, a substantially block of wood 6 between the saw blades 4 and 5 of the log surface 2 and the bottom surface 3 is removable; at the same stage as the grooving of the side surfaces. This not only speeds the production of the latch, but also improves its quality as the bottom of the notches formed on the top and bottom of the log become smoother than usual.

An embodiment of a device 20 for providing recesses 11 in the vertical side surfaces 9 and 10 of the log 1 in its operating position is | 5 to 8. Thus, the device comprises a substantially rigid body 22 with which a stop 23 protrudes. This stop has a first press surface 24 to be fitted to the side surface of the log. The body is further provided with a movable press means 25 having a second press surface 26. are substantially parallel to each other on the sides of the log faces. The movement of the pressing means is controlled by a mechanical, electrical or pressure-acting actuator (not shown) known per se, whereby a pressing force F is exerted on the opposite side surfaces of the log inserted between the pressing means and the stop. By varying Ϊ, the compressive force of the actuator is adjustable to the magnitude of the deformation, i.e. the depth of the well 11. By increasing the clamping force, the final irreversible deformation of the notch on the side surface of the log is increased. Λ

The device 20 may also be provided with a measuring device 27 which is rigidly adjusted to adjust the mutual distance between the press surfaces 24 and 26. With this type of measuring tool: •: *, the distance between the bottom of the holes 11 · · * * 25 can be confirmed, regardless of the thickness of the lighthouse. In addition, the device preferably comprises a guide member adapted to position the press surfaces 23 and> · · 24 at a desired position. Hereby, the pressing surfaces are aligned with the log, for example, by means of saw blades 4 and 5.

. The actuator for controlling the compression means 25 is either a pressure medium-operated hydraulic cylinder, a pneumatic cylinder or a mechanical device such as a spindle motor for controlling a rotary bar. The actuator thus controls the magnitude of the clamping force F applied to the side surface 9 and 10 of the log as well as the clamping surfaces. * ··. Intrusion. Such an actuator is preferably controlled by a luminous flux actuator.

• · · * · | · * 35 power supply in a wide variety of environments. Therefore, it is advantageous to make a salvos at the assembly point of the building, whereby the love of the log is not completed until the assembly. Thus, it is advantageous to make the device 20 necessary for the compression of 1 ° 117483 so small that it can be easily brought to any construction site.

The shape of the recesses 11 provided in the side surfaces 9 and 10 of the log 1 is adjustable not only in depth but also in shape by selecting the shape of the press pin 5 24 and 26 as desired. Accordingly, the press surface preferably comprises a wedge-shaped body providing a notch tapering toward its base. The design of the press surface also avoids breaking the edge of the latch cavity 11 and thereby rendering the latch a non-aesthetic. Therefore, in order to prevent edge breakage, the outer edge of the press surface must be sharp enough to cut the wood's grain structure upon penetration into the wood when it hits the wood surface. In an alternative embodiment of the press surface, its outer edge is arranged to be rounded. Hereby, the wood grain structure bends without breaking to the bottom of the salvo cavity when pressed against the surface of the log, maintaining the surface structure intact.

The clamping means 25 and / or the stop 23 may also be provided with at least one cutting means 21, such as a cutting blade 28, in accordance with Figures 6 and 7, whereby the wood blocks 6 between the saw blades 4 and 5 provided on the upper surface 2 and lower surface 3 are detachable. Hereby, the cutting blade is pressed against the side surface of the log when the log is pressed against the stop 20 and preferably also with the pressing blade provided with the cutting blade. The length of the cutting blade is selected such that a block of wood can be detached without the blade pressing against the side facing the log on its opposite side. The surface oriented toward the surface of the blade latch preferably comprises: a surface structure 29 for finishing the surface of a wood. Such is, for example, a rasp-like or file-like surface structure.

Another embodiment of the device 20 comprises Cutting means 21, • ·

*. ·· * .. for forming a notch 7 and / or 8 in the log. Preferably, the compression J

The surface then comprises at least one substantially U-shaped device according to Fig. 8 having, in addition to the cutting blade, two substantially parallel vertical blades * to make the cutting marks replacing the saw blades 4 and 5. To form the opposing notches 7 and 8 on the log, the Cutting Tools are arranged on the opposing press means 24 and the stop 23. Alternatively, the two Cutting Tools are mounted on the same press means or stop. * • ·.-Λ *;]; * 35 Naturally, the stop 23 in the device 20 can be arranged movable with respect to the run-size 22 · 22, as shown in Fig. 6, whereby the response is _ '' 'f

117483 I

11 controlled by a dedicated actuator (not shown). Thus both the response and the clamping means · | 25 are arranged to move toward a log 1 placed on the device from opposite sides thereof.

It is to be understood that the foregoing description and the accompanying figures are merely intended to illustrate the present invention. Thus, the invention is not limited to the embodiment set forth above or as defined in the claims, but many variations and modifications which are possible within the scope of the inventive idea defined in the appended claims will be apparent to those skilled in the art.

10 Thus, the description mainly deals with the manufacture of a corner liner for light barn. However, there is nothing to prevent such a process being utilized in making corner slabs made of thicker carved logs 1. The method achieves similar savings in working hours and handling of chip and chip, regardless of the thickness of the log.

The device 20 used in the method for providing the necessary recesses 11 to the side surfaces 9 and 10 of the log 1, both for light log construction and for thicker log construction. If necessary, it is only necessary to increase the compressive power of the device and to strengthen the structures somewhat.

The pressing of the log 1 can also be arranged with two different pressing devices. Thus, for example, the recesses 11 are pre-printed on the side surfaces of the log.

why at the factory or at the carcass, while the top and bottom 2 and 3 of the logs

Remove the wooden blocks 6. This work can be accomplished with a powerful clamping device, whereby notches and cavities can be made in lightweight logs as well as thicker carved * logs. During the final installation work, the grooves 11 ····· 25 on the side surfaces of the logs are finished, if necessary, with a lower power device, preferably with a luminous flux 20. This ensures fast installation and does not accrue wooden blocks 6. ··· easier pressing than usual thanks to the finished model in f. Such a procedure is particularly advantageous when the these are larger buildings or other buildings that * * * * ;;; * 30 cannot or do not want to be transported to the site. The procedure is particularly suitable for the construction and installation of small, individual saunas.

• * * · * · · '. . .

* - • * • · · • 4 ··· 'x • · ·· *. -'j

Claims (10)

A method of making a timber joint, said connection comprising timber or planed logs (1) joined together by knotting, wherein the logs to be joined are provided with recesses and depressions (7,8, 11) in their upper, lower and lateral surfaces (2, 3, 9, 10) so that the logs can be laid crosswise while a longitudinal contact surface is formed between logs lying above each other, characterized in that the recesses in the lateral surfaces (9, 10) of the log are formed by compressing it substantially. the opposite lateral surfaces of the dry log with a pressing tool (20) a pre-set distance in a direction substantially - perpendicular to the lateral surfaces, whereby, by controlling the force of the compression, the depth of the depression (11) in relation to the surface of the timber log is reduced and extends to the outside of the log. without compromising its pouring strength, they sat cut wooden blocks (6) out of the log to form recesses (7, 8) .V in the upper and lower surfaces (2, 3) of the log, the logs are arranged in a cross-sectional position, Cross-lying logs exhibited exits: · The gene first penetrates into each other and then into the pressed recesses, f · · · *, whereby the recesses (11) produced by compression are arranged to crawl against the logs. original side surface, to seal the joint between the logs. i * * 25 Method according to claim 1, characterized in that the gene (7, 8) exhibited by the upper and lower surfaces (2, 3) of the timber log (1) protrudes. • · / ** ·· * is obtained by saying at least two rafters (4, 5) in a substantially perpendicular directional direction; finding in each of the opposite facing surfaces and by removing the wooden blocks (6) which lie between the sawing bar, the parts of the log being advantageously • · ·. . & 30 is released in conjunction with the compression of the side surfaces with at least one cutting edge (28) shown by the pressing tool (20). J. ···. Method according to claim 1, characterized in that the recesses (7, 8) having the upper and lower surfaces (2, 3) of the log (1) are achieved by removing the wooden blocks (6) by pressing the side surfaces. with at least one cutting edge (28) shown by the pressing tool (20) and with a cutting insert (21) comprising two parallel vertical edges (30) in connection with the compression of the side surfaces. 4. A method according to claim 1, 2 or 3, characterized in that the compression takes place in immediate connection to the transmission of the timber connection. Apparatus for the preparation of recesses needed for a timber joint, said timber joint comprising timber or planed logs (1) joined by knot carving, said logs having upper, lower and lateral surfaces (2, 3, 9, 10) characterized in that the device (20) comprises a pressing tool having two substantially parallel and oppositely arranged contact surfaces (24, 26), the contact surfaces being substantially parallel to the lateral surfaces (9, 10) of the timber log (1) and arranged to be operated with controllers for approaching each other and pressing the timber stock arranged therebetween, to provide recesses (11) in the lateral surfaces of the timber without clamping machining and without impairing its pour strength, whereby the percentile has a pre-set size. ? Device (20) according to claim 5, characterized in that the recess (11) provided in the lateral surfaces of the log has a depth Y of 1 ... 2 mm. > Device (20) according to claim 5 or 6, characterized in that the contact surfaces (24, 26) of the device (20) comprise devices which are substantially wedge-shaped in a direction oriented towards the log (1) ··· · Direction to provide a recess (11) which is tapered to its bottom in the lateral surfaces (9, 10) of the log. [·· *. Apparatus (20) according to any of claims 5-7, characterized in that the movement of the contact surfaces (24, 26) is arranged to actuate. is driven by at least one hydraulic controller, which is driven by a pressure pump controlled by an electric motor. ·· »* ·· ** 9. Device (20) according to any one of claims 5-7, characterized in that the movement of the contact surfaces (24, 26) is arranged to actuate * *. ·. * ··. is driven by at least one electric spindle motor, wherein one of the spindle motors raised, such as a pin screw, is arranged to control the speed and force with which the contact surface impacts the log (11). • · · • · ·· 11 7483 Device (20) according to any of claims 5-9, characterized in that the device (20) comprises a substantially movable counter hob (23) with a contact surface (24) and a second contact surface (26) arranged to move against it. , to provide pressure in the opposite side surfaces of the log. • | _ '1.' t. > l ··· Λ ···· »· • φ ® ♦ φ φ Φ • · · · 1 · · • '(• · 1 • Φ Φ φ φ Φ • · • · ® ® ®.' ·:: : · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 1 · · · 'j 1 ·