FR3046561A1 - WOOD LONGILINE ELEMENT DEDICATED TO STAIR MANUFACTURING AND METHOD OF MANUFACTURING SUCH A MEMBER - Google Patents

Abstract

Longiline wooden element (3) having at least one textured surface after machining, having relief shapes (4, 40), characterized in that the shapes (4, 40) extend asymmetrically over said surface and are distributed randomly.

Description

WOOD LONGILINE ELEMENT DEDICATED TO STAIR MANUFACTURING AND METHOD OF MANUFACTURING SUCH A MEMBER

The present invention relates to the field of wooden stairs, and more particularly to an elongated wooden element dedicated to the manufacture of stair treads and wooden handrails, the element comprising a textured surface, that is to say a surface provided with relief shapes.

The steps of a staircase are usually smooth which can make them slippery. For safety, it is often attached to the nose of the steps, non-slip strips, such as plastic with protuberances, or based on a mineral or artificial abrasive, quartz or carborendum, which provide a protective function. grip for the user's feet, reducing the risk of falling.

Furthermore, for another purpose, that of well-being, it is known to provide floor coverings with protuberances allowing walking, massage the arch. In this respect, the protuberances are for example made of spheres or polygons. The Chinese utility model CN203022290U proposes for the foot massage, wooden floorboards with protuberances of general shapes in trihedral or truncated polygons and straight edges on their sides, to facilitate the manufacture contrary to forms totally spherical. The protuberances are manufactured by machining in the mass of the wood, making grooves of identical depth and in an orderly manner in several directions, spaced regularly, being parallel to each other longitudinally and transversely.

However, visually, this regular arrangement of protuberances proposed by this document can discourage the user to walk on such a coating, for fear of feeling too much protuberances under the feet. In addition, these protuberances form geometric patterns clearly visible and therefore can be considered unsightly. Moreover, their depth does not allow a varnished or lacquered finish. Finally, the proposed forms do not provide an optimal massage effect, as stimulating the entire arch in the same way. The invention thus proposes another type of texturing for producing protuberances intended to be arranged on stair steps and stairs handrail profiles.

Therefore, in order to increase the safety and well-being of stair users, the invention proposes an elongated wooden element dedicated to the manufacture of steps and stair handrails and having a textured surface which, different from the prior art, provides when one borrows the steps without shoes or that one slides his hand on the banister, a function of safety, anti-slip and better grip by combining advantageously for the steps a foot massage function is not aggressive for the arch, The surface of support is totally stimulating, while being sensory pleasurable for the user without being physically too perceptible. In view of the handrail of a staircase, the gripping surface which is then textured and non-slippery solicits the nerve endings of the inner face of the hand and fingers so as to increase the feeling of grip. The invention also relates to a method of manufacturing such a textured wood element which remains very economical, since in particular profiled as fast as a conventional linear machining.

According to the invention, the elongate element made of wood, having at least one textured surface after machining, comprises raised shapes resulting from machining by digging the flat surface of the wood taken as a reference before machining the element and, is characterized in that the shapes extend asymmetrically over the textured surface and are distributed randomly.

The term "random" in the sense of the invention, the fact that the probability of seeing reproduce the same shape (in geometry and dimensions), on the elongated element and on the steps from several elongated elements, is almost nothing.

Thus, the raised forms generate the use of anti-slip function, while providing a massage effect without the user realizes it, at least without exaggerated perception.

Moreover, unlike the aforementioned Chinese utility model, the applicant has surprisingly demonstrated that the asymmetrical and random characters of the shapes, avoid the user the contact of identical shapes in the crossing of his stride line, and therefore, avoid any physical discomfort to walk on a textured surface and not smooth, while providing even a pleasant sensation, and generate over time by the rise and descent of the staircase the desired massage effect.

Moreover, the gripping of the handrails by the user enjoys the same tactile sensations as for the stairs; hands squeeze and support a structured surface that provides added security. The slender element of the textured surface invention allows for optimal self-stimulation of all nerve endings of the arch and inner side of the hand and fingers. In addition, by the asymmetrical and random characters, the user never meets the same forms, which favors a diversified stimulation of different points of contact and support.

In this the invention of a random structuring of the wood material solicits the senses of the touch, and the vision by visual contrasts resulting from the textured surface.

The raised forms are integrated into the material of the elongated element as machined in the mass of the wood. They are therefore solidary and fixed.

According to one characteristic, the shapes have a variable height, preferably at most 5 mm relative to the deepest cavity, even more preferably at most 2 mm, to ensure self-stimulation without discomfort for the user.

Preferably, the raised forms have ridges with rounded top (dome) or flattened, the vertices not being sharp.

Each relief shape has peaks, hollows or cavities and faces. The panels extend in planes between the top and the bottom of an adjacent cavity, which have different angles with respect to the flat surface of the wood taken in reference before machining the element. The angle between the inclination of the two sections connecting the top is preferably acute.

The cavities or cavities are obtained by machining, preferably the bottom of the cavities is concave.

According to a first embodiment variant, said striated forms, the raised shapes have elongated profiles (the profiles being considered both in top view and in longitudinal section of the elongate member), said profiles being spaced apart and at a distance from each other. general appearance of asymmetrical sinusoidal type corrugations, in particular the elongated profiles extending in the longitudinal direction of the wooden element. Each profile is different from the others by the "frequency", the height, etc., of the undulations.

The term "general sinusoidal pace" means a line that winds or undulates without being symmetrical with respect to a longitudinal axis, and having different undulations in height and width.

In this first variant, each elongate profile is spaced from another profile in a direction transverse to the longitudinal direction of the element (between two vertices or convexities), of a variable and random distance understood as an example between 2 , 5 and 12 mm.

In this first variant, a profile (a relief) has a width, considered at the base of two faces defining a vertex (or considered according to the upper surface of the vertex or convexity), which is very small, in particular less than 2 mm.

The convexities or vertices have no sharp or protruding edge.

According to a second variant, called gouged shapes, the relief shapes have bumpy profiles with an alternation of recesses with concave surfaces (concavity turned towards the user), the hollows being made by gouging in the mass of the wood during the machining. The depressions have a variable amplitude, the amplitude being the distance, in a plane perpendicular to the surface before machining, between the bottom of a hollow and the top of the relief shape. The raised shapes define upper borders with irregular geometry. The alternation of troughs of variable amplitude, translates from upper edges or crest lines to closed contours, various and in variable altitude planes. Each ridge line defines two sides on each side whose angle between the two faces is obtuse and preferably between 130 ° and 155 °. The outline of these ridge lines draws random geometrical figures with closed lines, of asymmetrical shapes among themselves. The shape of the contours does not have a defined geometry; the contours are different from each other. The outlines have closed lines that stretch in different depth / height planes. The same closed contour ridge line travels at a variable altitude. Since the ridge lines are not parallel to each other, the outline of the closed lines (perimeter) around the hollows is characterized by dimensions of several centimeters, such as between 7 cm and 14 cm. In this case, the largest dimension (in top view) of the depressions have values comprised in particular between 10 and 50 mm.

Thus in this second variant, the alternation is such that each hollow is delimited by a closed-line peripheral contour of geometry and dimension different from that of the other hollows. Each recess has a so-called upper surface, considered relative to the reference plane of the plane surface before machining, of between 300 mm 2 and 1500 mm 2.

According to another feature, the section of the striated shapes of the first variant has a slope starting from the vertex with the plane of the reference surface, whose angle is between 20 and 50 °.

According to another characteristic, the depressions of the gouged shapes of the second variant have a slope, starting from the upper planar surface of the wooden element, whose angle with the plane of the reference surface is between 10 and 20 °. The invention also relates to a staircase comprising at least one step resulting from the elongate element of the invention after transverse cutting of said element relative to its longitudinal direction.

For a staircase comprising at least two steps, the steps thus comprise different texturing profiles from one step to another.

In this way, by taking the stairs, the user never meets the same structure of forms and thus different points of support of the foot are stimulated. The invention also relates to a stair handrail comprising at least one elongated element of the invention after cutting and forming to form the handrail, the handrail presenting on its upper face and / or its side walls the textured surface of the elongated element.

According to another advantageous characteristic, at least a part of the textured surface of the elongate element comprises a finishing coating such as a lacquer or patina, and / or a fluorescent coating. In particular, in the case of a fluorescent coating, it is distributed over an area intended to correspond to a portion of the nose of a step, to identify the steps for people with visual impairment. The invention relates to the use of at least one elongated element of the invention for constituting the steps of a staircase, in particular to prevent the slipperiness of the steps and to provide well-being to the user walking preferably barefoot on the wood, or to form a stair handrail. The invention furthermore relates to a method of manufacturing the elongated wooden element of the invention, the elongate element being machined by being translated in a direction of travel corresponding to the longitudinal direction of said element, preferably on a groomer, characterized in that it implements at least one machining tool arranged on at least one shaft in rotation and extending in a direction transverse to the running direction, the shaft being rotatable in one hand in a direction opposite to the direction of movement of the element and secondly movable in translation transversely to the direction of travel.

The term "mobile" rotates in a direction opposite to the direction of travel of the element, the fact that the tangential direction of the tool is in the opposite direction to the direction of travel.

Subsequently, the displacement of a shaft transversely to the direction of travel is termed axial.

These different mobilities of the machining tools with regard to the scrolling of the elongate element make it possible to obtain the random and asymmetrical characters of the relief shapes of the wooden element of the invention.

According to one characteristic, the speed of movement of the elongate element, also called feed speed, is between 6 and 15 linear meters per minute (ml / min). Such a speed corresponds to the speed of a conventional grinding machine for machining wood. Thus, the method of the invention has the advantage, despite the diversity of shapes to be machined, to maintain a customary scroll of the material, which does not impact the manufacturing time, to obtain an economic return of the production.

According to another characteristic, the rotary shaft is also movable in vertical translation, that is to say in a direction perpendicular to the horizontal plane of travel.

Preferably, the method uses at least two rotating shafts, each carrying at least one, preferably several, machining tool (s), the shafts being spaced and parallel, rotating in the opposite direction of movement of the elongate member being movable in translation transversely to the direction of travel, and at least one of the shafts is further movable vertically, that is to say in a direction perpendicular to the horizontal plane of travel. The displacement in the vertical direction will thereafter be described as vertical displacement.

Preferably, one of the two shafts is vertically offset relative to the other shaft, that is to say that the trees in the fixed position are arranged so that one is higher than the other relative to the other. scrolling plane of the elongated element.

Advantageously: the speed of rotation of the rotary shaft or rotating shafts (and thus of the tool or tools) is between 8500 revolutions / min and 10,000 rev / min; the axial displacement speed is between 30 and 300 mm / second; the axial displacement amplitude of a shaft is between 0 and 60 mm, preferably between 20 and 40 mm; the vertical movement speed is between 10 and 30 mm / second; the amplitude of vertical displacement is between 0.60 and 0.90 mm. the vertical offset between two shafts is between 0 and 1 mm, for example 0.1 mm.

Thus, the combination of the multifactorial parameters related to the machining tools and the scrolling of the elongated element made of wood (scrolling speed, rotational speed, translation speeds) guarantees the randomness of the relief shapes.

Preferably, each shaft has several tools, such as four, distributed regularly along the circumference of the shaft.

A tool has a knife whose profile comprises an irregular alternation of recesses and convexities with sharp edges to ensure the profiling of the wood. Each tool of the same tree is strictly identical to ensure optimal profiling of all the tools of the same tree.

In this way, when using the tool, the convexities associated with the recesses generate the hollows or cavities on each side of the relief shapes. The profiled relief shapes are not prominent. They have a rounded or slightly flat convexity. As a preferred example, the device comprises at least two tool shafts, the tools having knives of different profile from one tree to another. The use of two tool shafts with different tool profiles increases the machining variables to increase the number of textured surfaces. The randomness of shapes is further increased with two trees with tools of different profiles. This configuration of multiple trees and distinct profiles of knives also allows to have for the first variant striated forms, streaks or lines of close approximation such as less than 5 mm.

In the remainder of the description, the terms "horizontal", "vertical", "upper", "lower", "upper", "lower", "are considered with respect to the horizontal scrolling plane. an elongated element, and the terms "upstream" and "downstream" agree with respect to the direction of movement of the elongated element.

The term "width" corresponds to a dimension extending in a plane parallel to the textured surface of the elongate element and transversely to the longitudinal axis of the elongate element.

The term "height" is a dimension extending in a plane perpendicular to the textured surface of the elongate member. Other objects, features and advantages of the present invention will appear in the following description with the aid of examples which are only illustrative and in no way limitative of the scope of the invention, and from the attached illustrations in which:

Figure 1 is a partial perspective view from above of steps of a wooden staircase having a textured surface streaked according to the present invention;

Figure 2a is a schematic partial perspective view of a slender wooden member having a striated textured surface according to the present invention;

Figure 2b is a partial top view of the textured textured surface of Figure 2a;

FIGS. 3a to 3c are diagrammatic sectional views, illustrating the profiles of the textured surface along part of the width of the element of FIG. 2a and respectively according to the sectional planes A-A, B-B and C-C of this FIG. 2a;

Figure 4a is a partial perspective view of a slender wooden element according to a second variant textured surface said gouged;

Figure 4b is a partial top view of the textured gouged surface of Figure 4a;

Figure 4c is a partial sectional view of Figure 4a;

Figure 5 is a schematic top view of the machine tool used for the manufacture of the elongated wooden element of the invention;

Figure 6 is a schematic longitudinal sectional view of Figure 5;

Figure 7 is a schematic sectional view of a shaft carrying the machining tools of the machine;

Figure 8 is a partial sectional view of a knife of a machining tool.

FIG. 1 illustrates part of a staircase 1 according to the invention having steps 2A to 2D coming from elongated wooden elements 3 produced by the method of the invention, a detailed view of which is illustrated in FIG. 2a.

Each step is derived from an elongated machined element of corresponding length before machining to that of the step or of an elongated element machined and then cut to the length of the step. In the remainder of the description, a step will be considered as well coming from an elongated element or a part of an elongated element. The elongated element described below could also be used to constitute a stair handrail.

With regard to FIGS. 2a, 2b and 3a to 3c, the elongate element 3 has a textured surface after machining which comprises a multiplicity of relief shapes 4. These relief shapes 4 were obtained by having the wood cut by machining. They are derived by digging a reference surface corresponding to the flat surface of the wood before machining and schematically illustrated by the line S in Figures 3a to 3c.

The relief shapes 4 are all different; they have different profiles over the entire surface of the elongate element 3. They extend asymmetrically on the surface of the elongate element 3 and are distributed randomly, so that each step 2A to 2D of Figure 1 consists of an elongated member 3 having a different textured surface.

The relief shapes according to the type of machining have different aspects. Two non-limiting examples of forms whose general appearance is distinct are given below, so-called striated shapes (FIGS. 2a, 2b), and so-called gouged shapes (FIGS. 4a, 4b).

The striated forms have a much finer width of relief than the gouged shapes, and are much closer to each other, while the gouged shapes have larger, more spread out and flattened reliefs. The striated forms do not intersect. On the other hand, the gouged shapes meet at points of intersection with the peaks of the hollows.

FIGS. 2a and 2b illustrate the striated shapes 4 which are elongated profiles with the general appearance of asymmetrical sinusoidal type corrugations, extending in the longitudinal direction of the wooden element 3.

Two substantially parallel and consecutive relief shapes 4 delimit an elongate recess or cavity 5 which also has an elongated profile with the general appearance of asymmetrical sinusoidal type corrugation.

The striated forms have the appearance of ridge lines more or less parallel to each other.

The striated shapes 4 are spaced from each other in a direction transverse to the longitudinal direction of the element 3, at a distance "e" which corresponds to the width of a cavity 5 and varies randomly along the element 3. Thus, the distances "Θα", "ee" and "ec" respectively taken along the cutting lines AA, BB and CC of the surface of the element 3, are different for two straight striated shapes 4 consecutive. For example, the width "e" for striated shapes is between 2.5 and 11.5 mm.

In the variant shown in Figures 4a and 4b, the referenced relief shapes 40 are said gouged, delineating troughs 50 closed lines. Each recess 50 has a peripheral contour 9 with a closed line of geometry and dimension different from one recess to another.

The gouged shapes thus have profiles with an alternation of hollows and reliefs, the reliefs drawing ridge lines with closed contours. Two juxtaposed troughs being separated by a common ridge line. The ridge lines (reliefs) are more spread out than the ribbed shapes, both according to the length of the element 3 and according to the width of the element.

Preferably, the width of a hollow of a gouged shape (dimension seen from above) is included as an example of 10 and 50 mm. In general, the cavities or recesses of the raised forms 4 (striated or gouged) have geometries that differ from one form to another and over the entire surface of the elongated element. In particular, the depth of the hollows, dimension considered according to the dimension of the thickness of the wood, and the slopes of the relief forms running from the peaks to the bottom of the hollows are of various dimensions. In general, each raised form 4 (grooved or gouged), when at the general shape of a sinusoid, has a profile different from the other by the frequency of the corrugation.

In addition, the probability of seeing the same ripple within the surface of the elongate element reproduce is almost zero. With reference to FIG. 2b, the undulation of the form 4 in the zone A-B is different from the undulation of the same form 4 in the zone B-C.

In the same way, the elongated cavities 5 have random and asymmetrical profiles.

FIGS. 3a to 3c show the structure of the textured surface of the elongated wooden element 3 of FIG. 2b in cross sections at the respective lines A-A, B-B and C-C. Each FIG. 3a to 3c thus represents the reliefs of the consecutive ridges along the width of the elongate element 3.

It can be seen that the profile of each of FIGS. 3a to 3c is different implying that at each of these cutting lines, the relief shapes 4 considered as adjacent lines are different in their geometry and their dimensions. This is true for the entire surface of the elongated element 3.

In addition, for the same line of relief shapes, the geometry of its profile is distinct and the height of the reliefs is different.

In particular, three striated shapes 4A to 4C taken singly on the same line of relief shapes 4 comprises a peak-to-crown, respectively 6A to 6C, rounded, and a pan 7A to 7C from the top to the bottom of one adjacent cavities 5, each of the flanges extending in a plane inclined at a respective angle aA to ac relative to the reference surface S representative of the flat surface of the wood element before machining.

The angles aA to ac of the sections 7A to 7C are different from each other. FIG. 3a shows an angle aA of the order of 30 °, whereas FIGS. 3b and 3c respectively show an angle aB of the order of 65 ° and an angle ac of the order of 45 °.

It is the same for the opposite pan to each of the sections 7A to 7C do not have the same inclination.

Thus, within the same elongated relief shape 4, the slope on either side of the ridges is different throughout the elongated element in wood 3.

FIGS. 3a to 3c also show that the amplitude in height of the striated shapes varies: on the one hand according to the width of the elongated element 3 (from an elongate shape in relief to an adjacent relief shape): set of the profile is distinct according to each figure with different heights between the vertices and the bottom of the cavities; on the other hand, according to the length of the elongate element 3: for the same elongated striated shape, the height HA of the vertex 6A at the level of the section AA is different from the height HB of the vertex 6B at the level of the section BB, and still distinct from the height Hc of the vertex 6C at the level of the section CC.

Moreover, FIGS. 3a to 3c illustrate the fact that the same elongate relief shape 4 has a profile whose width (distance between two bottoms of cavities) L-ι to L3 is variable along the length of the elongate element 3 .

In addition, as seen in Figures 3a and 3b, two consecutive vertices of two adjacent ridged lines 4A and 4D, and 4B and 4E respectively, taken along the direction of the width of the elongate element, have a different height.

Similarly, the slope of the sections of these peaks is also different.

The diversity characteristics described above for striated relief shapes also apply to the gouged shapes of Figure 4a.

With reference to FIG. 4c showing a sectional view of FIG. 4a, two adjacent gouged shapes 40 define respective vertices, one of whose associated slopes 7D and 7E has an angle "a" >> and respectively "β" >> distinct with the reference surface S.

Similarly, the depth of the cavities 50 is different, and the width separating two vertices 40 is also different. In general, regardless of the relief shapes 4, the height of the cavities 5 or 50, the dimension considered between the lowest bottom of the cavities schematized by the line S 'in FIGS. 3a to 3c and FIG. 4c, and the reference surface S, which is also the plane containing the highest peaks, is at most 5 mm. Thus, the perception by the user of the raised forms of the invention, when he walks on the textured surface of the elongated element, is never exaggerated, and the visual and tactile perception contributes to safety and the good -being felt.

In addition to the anti-slip or anti-slip function of the raised shapes, their various profiles spread over the surface of the elongated element and from one step to another of a staircase can stimulate the arch of the plant while being very subtle sensory to the user. It is the same with the tactile perception of the handrail. The invention further relates to the method of manufacturing by machining the elongated wooden element of the invention.

FIGS. 5 and 6 illustrate a grinding machine 10, comprising a longitudinal support surface 11 and a running surface along the arrow F for the elongated element 3, and lateral guides 11 A, as well as according to the invention, one or preferably two rotary shafts 12A and 12B extending in a direction transverse to the direction of the surface 11, also movable in translation as will be seen later, and machining tools, preferably four machining tools, 13A to 13D (Figure 7) being arranged on each of these shafts 12A and 12B.

The scroll surface 11 has a usual length of 8 m. It serves as a support for the wooden element 3 intended to be machined which runs continuously upstream of the shaft 12A until downstream of the shaft 12B, at the usual speed of a conventional grinding machine, for example the order of 6 to 15 ml / min.

The shape of the machining tools, the rotation of the shafts and therefore of the tools, as well as the movements in translation of the tools while the elongated element runs, make it possible to machine the raised forms of the invention described above, Random profiles and distribution.

The shafts 12A and 12B are spaced and parallel. They are spaced for example by a distance of 800 mm.

The shafts 12A and 12B are movable in rotation, in the direction of the arrow illustrated "r" in FIG. 6, which direction is opposite to the direction of movement F. The rotation speed of the shafts 12A and 12B is, for example, 8 500 rpm.

The shafts 12A and 12B are also movable in translation along the arrows F ', transversely to the running direction of the wooden element 3 and parallel to the axis of rotation of the shafts. Hereinafter referred to as displacement displacement "axial". The amplitude of the axial displacement is a few centimeters, for example between 10 and 40 mm, for example 20 mm. The amplitude imposed on one of the trees may be different from that of the second tree.

The axial displacement speed of the shafts can also and preferably is different. The gear ratio is for example 2. The axial displacement speed of the shaft 12A is for example 7.5 mm / second, while that of the second shaft 12B is 12.5 mm / second.

In addition, the shafts are able to be movable in translation along the arrow G (FIG. 6) in a direction perpendicular to the direction of their axis of rotation (during the movement), that is to say according to a vertical displacement by relative to the horizontal plane of scrolling. The vertical movement speed is in particular between 10 mm / second and 30 mm / second. The vertical displacement amplitude is a few hundredths of a millimeter, for example: 0.65 mm.

Finally, the two shafts are preferably vertically offset relative to each other, that is to say at rest, the shafts have their axis of rotation arranged in planes offset vertically with respect to the plane of rotation. scrolling. This height preferably does not exceed one millimeter, and is for example 0.1 mm.

FIG. 7 shows that the machining tools 13A to 13D are regularly distributed along the circumference of the shaft 12A.

Each tool 13A to 13D comprises a knife 14A to 14D, one of the profiles shown diagrammatically in FIG. 8 comprises an irregular alternation of recesses 15A and convexities 15B with cutting edges which are intended to machine the raised shapes 4 of the element 3. Each knife profile is preferably different on each of the two machining shafts. In contrast, the profile of the four knives is the same per machining shaft. The machined wooden element 3 at the output of the grinding machine 10 of the invention has a textured surface comprising the raised shapes 4 integrated into the wooden material of the elongated element 3 and randomly and asymmetrically. The machining of this wooden element 3 is now described. In 50 seconds, a slender element of 5 m can thus be machined to present the textured surface of the invention. The wooden element 3 is disposed on the table 11 of the grinding machine 10. It is translated in the direction of travel F corresponding to the longitudinal direction of said element 3. The speed of travel, also called feeding speed, is for example of 6 ml / min to obtain the striated forms of Figure 2b while it is 12 ml / min for the gouged forms of Figure 4a. By way of non-limiting example, for the gouged shapes, the rotation speed of the shafts 12A and 12B is 8,500 rpm, the axial displacement amplitude of the shafts 12A and 12B is 37 mm, the displacement speed The axial axis of the shaft 12A is 125 mm / second while that of the shaft 12b is 125 mm / second.

The shafts 12A and 12B are further movable in vertical translation, with an amplitude of 1.5 mm.

In the other embodiment of the invention, to provide striated shapes according to Figure 2b, the grinding machine 10 implements only one shaft. The feeding speed is 10 ml / min.

The rotational speed of the shaft is 8,500 rpm. The axial displacement amplitude is of the order of 30 mm, and the axial displacement speed of 30 mm / second.

Claims (10)

A slender wooden element (3) having at least one textured surface after machining, having raised shapes (4, 40), characterized in that the shapes (4, 40) extend asymmetrically over said surface and are distributed randomly. 2. Longiline wooden element (3) according to the preceding claim, characterized in that the raised forms (4, 40) have a variable height, preferably at most 5 mm relative to the deepest cavity, even more preferably at most 2 mm. 3. elongated wooden member (3) according to any one of the preceding claims, characterized in that the raised forms (4, 40) have peaks peak (6A, 6B, 6C) rounded or flattened. 4. elongated wooden element (3) according to any one of the preceding claims, characterized in that the relief shapes (4, 40) have vertices (6A, 6B, 6C, 40), recesses or cavities (5 , 50), and sections (7A, 7B, 7C, 7D, 7E), the sections extending in planes between the top and the bottom of an adjacent cavity, which have angles (σ ', β', αΑ, αΒ, ac) different from the flat surface (S) of the wood taken as reference before machining the element. 5. elongated wooden element (3) according to any one of the preceding claims, characterized in that the shapes (4) have longilinear profiles spaced a distance (e) random between 2.5 and 12 mm, to the general appearance of asymmetrical sinusoidal type corrugations, in particular the elongated profiles extending in the longitudinal direction of the wooden element (3). Longitudinal wooden element (3) according to one of Claims 1 to 4, characterized in that the shapes (40) have bumpy profiles with alternating recesses (50), the shapes (40) defining edges. superior to the contours (9) closed and irregular geometry. Wooden elongated element (3) according to one of the preceding claims, characterized in that the textured surface of the element (3) has a finishing coating such as a lacquer or patina, and / or a coating fluorescent. Staircase comprising at least one step resulting from at least one elongate element according to any one of the preceding claims. 9. Stair handrail from at least one elongate element according to any one of claims 1 to 7. 10. A method of manufacturing the elongated wooden member (3) according to any one of claims 1 to 7, by machining, the elongate element (3) being translated in a direction of travel (F) corresponding to the direction longitudinally of said element, preferably on a grinding machine (10), characterized in that it implements at least one machining tool (13A, 13B, 13C, 13D) arranged on at least one shaft (12A, 12B) in rotation extending in a direction transverse to the running direction (F), the shaft (12A, 12B) being firstly rotatable in a direction opposite to the direction of movement (F) of the element and on the other hand mobile in translation transversely to the running direction (F), and in that the machining tool (13A, 13B, 13C, 13D) comprises a knife (14A, 14B, 14C, 14D) whose profile has an irregular alternation of recesses and convexities with sharp edges.