EP1616682B1 - Length of bamboo cane having artificial knot and method for its manufacture - Google Patents

Abstract

The section has a bamboo cane (1) and an artificial knot (2'). The artificial knot is naturally grown knot (2b) and fastened to a desired axial position on the cane. The artificial knot is positioned close to the front side end and in particular inside the pipe. An independent claim is included for a method of manufacture.

Description

I. Field of application

The invention relates to a bamboo pipe section with artificial knot.

II. Technical background

Due to its high elasticity and stability, especially in Asia, bamboo is used in a variety of ways as a constructive element, from the construction of tower-high scaffolding to the use as a material for seating and crockery.

Bamboo is also used in Europe, especially for the production of seating furniture, bed frames and the like.

In principle, there is the problem that the moisture content, as it has the bamboo tube during growth, namely about 55 to 110% by weight, sinks after the cutting of the tube and the completion of the capillary water supply from the root system to the humidity of the environment. While in Asia, due to the usually very high humidity, this difference only occasionally leads to the cracking of the bamboo pipe, such pipes tear almost regularly during transport to Europe or North America and especially when used in centrally heated or air-conditioned rooms, due to the then existing very high moisture difference.

JP-A-06179204 discloses a method of preventing cracking in a bamboo tube section.

Although the stability of the bamboo cane is affected by cracking, this is not the major drawback, but the degraded optical effect when the bamboo cane was used as a construction material for relatively high-quality furniture.

Since the bamboo cane has a closed, circular cross-section and is divided longitudinally at irregular intervals from bulkhead transverse walls (knots), the methods of crack avoidance known from the treatment of board-processed solid wood (layer-wise gluing of the solid wood planes in an angular fiber direction to each other ) are not used for crack prevention. Because on the one hand, bamboo is not biologically a species of wood, but a giant grass and also there are almost opposite behaviors in physical terms:

While wood has the conduction cells for the transport of liquids, especially in the outer areas directly under the bark, and therefore a tree trunk in the outdoor area the highest and in the core area the lowest moisture content, it is exactly the opposite with bamboo: In the outer third of the tube are the support cells, which give the bamboo its strength, while inside follow the Leitzellen and storage cells for the water to be absorbed with the built-up builders. Consequently, the two substances behave absolutely unequal, especially since it is added that the physical behavior of the bamboo is again completely different due to the hollow construction with the transverse walls present in the axial direction.

In addition, the moisture content of bamboo canes is not only generally higher in the cut than in wood, but also varies much more depending on the location, current climate and, viewed in the cross-sectional direction of the bamboo tube as well as in the axial longitudinal direction, of the size.

A particular problem with the use of bamboo, especially in Europe, are the bulkhead transverse walls, the so-called knots, of the bamboo cane:

The bamboo, which also varies greatly in diameter when the ambient humidity fluctuates, shrinks or expands less in the area of the knot than in the area of the remaining pipe sections, because the continuous bulkhead opposes the reduction in diameter of the hollow pipe, which is why natural nodes are often used for the Cracking are responsible. For this reason, the nodes are usually removed before processing bamboo, especially in the furniture production, z. B. by milling or piercing the transverse walls.

On the other hand, it is often necessary in the use of bamboo as a constructive element, especially in furniture, to have a node at the front end of the required bamboo tube section, so at least one optically occlusive transverse wall. If this is required at both ends of a section of predetermined length, it is very expensive, if not impossible, to find a bamboo tube which on the one hand has the desired outer diameter and on the other hand has two nodes at exactly the desired distance from each other.

III. Presentation of the invention a) Technical task

The object of the present invention is therefore to provide a bamboo tube section which has at two defined locations at the correct distance from one another in each case a bamboo-typical node in the form of a bulkhead transverse wall, and to provide a method for producing such a pipe section ,

b) Solution of the task

This object is solved by the features of claims 1, 8, 11 and 15. Advantageous embodiments will be apparent from the dependent claims.

By artificially placing a knot in a bamboo tube, it is possible to create a section of bamboo tube of predetermined length, which is closed at both ends by a knot at the end.

This is achieved by cutting the section to the desired length, even if there is no natural knot of the bamboo tube at least at one end. Also, the nodes present in the course of the tube are usually all removed for the drying process. At the other end, a natural node can be left or an artificial node can be set there. At this terminal, e.g. after drying the pipe, put a knot artificially.

As an artificially set node, so the bulkhead, is either aware of a foreign material, in particular in a circle, z. B. made of wood, especially with fiber direction transverse to the main plane of the bulkhead, or pressed and glued wood particles, or metal, especially stainless steel or aluminum or glass, stone or plastic used, or just a naturally grown node of the same or another bamboo cane.

The artificially set knot is - in the simplest case - placed flat on the end face of the length cut pipe section, but usually used and anchored inside the open frontal end of the section.

In the most common case, the aim is to make the artificially set node appear as a naturally grown node at this point. For this purpose, the knot to be set artificially from a naturally grown node of a bamboo cane, preferably another bamboo cane is used. The starting node used as an artificial node should have approximately the same outer diameter as the Applizierungsstelle the pipe section, but at least its wall thickness, preferably a larger wall thickness.

The fastening preferably takes place in that the inner diameter is enlarged from the end face of the pipe section at the point of application by milling or boring - also to minimize the tendency of the pipe to crack - and an exactly round contour is preformed, preferably with a right-angled, end-side end face as a stop.

Of the wall thickness of the pipe section is thereby removed at least 30%, better about 50%, especially even more than 50% of the wall thickness of the starting pipe.

In order to ensure an approximately constant residual wall thickness, for optical reasons alone, at the exit tube, only tubes are used as the tube section for which the outer circumference, in particular at the point of application, by at most 15%, in particular at most 10%, especially at most 5% deviates from the circular shape.

In such a cutout a grown node is used, was removed from the outer wall thickness of the outer peripheral region, again by at least 30%, better about 50%, better more than 50%, in particular more than 60% of the wall thickness. The removal of the outer areas of the natural knot to be used as an artificial knot also causes the tendency of the crack, due to the different shrinkage behavior of the outer areas of a bamboo cane to those further inside lying areas, and thus there is a higher probability that the pipe section equipped with the artificially set node will not break in the future.

Of course, there remains the problem that the pipe section in which the node to be artificially placed, and in particular the outer peripheral sections thereof, shrinks differently than the artificially set node.

However, when inserting the artificial knot, both the knot to be set and the tube section into which it is inserted are already preferably dried to a relatively low residual moisture, so that the probability of further shrinkage and tearing is relatively low.

While drying down the diameter decrease was lower at the parent node due to the rigid bulkhead less than in the pipe section to be machined in the previously usually the bulkheads were pierced, however, the matching diameter of knots to be set and pipe section until after drying down to each other selected.

However, even future different shrinkage can be compensated under certain circumstances by a radial clearance between the outer circumference of the knot to be set artificially and the inner circumference of the recess of the pipe section, which is compensated by a possible elastic binder or adhesive, which is used anyway for fixing , For this reason, the adhesive joint should also have a radial thickness of 0.1 mm to 0.9 mm, in particular from 0.3 mm to 0.6 mm.

In particular, it is equally important that the natural knot provided as an artificial node beforehand slowly, for at least ten days, preferably at least two weeks or even three weeks, to the final moisture is dried down during application, and this final moisture by a maximum of 10% by weight, in particular max. 8% by weight, in particular max. 3% by weight of the moisture of the pipe section, in which applied, deviates at the time of application.

Also to reduce the tendency to crack is provided as artificial knot to be set natural knot for the pretreatment process, especially the drying, in the form of a piece of pipe of at least 3 cm in length, better 5 cm in length, better 8 cm in length cut out of a pipe and only after the drying, but preferably before removing the outer peripheral regions, which is usually done by means of turning, cut to its final axial length, which is usually 1 to 3 cm, in particular only 1 to 2 cm.

The gluing is facilitated by pushing in the knot to be set artificially up to the end stop of the cutout in the pipe section. Instead of the rectangular recess but also a conical recess can be selected, with the result that the outer circumference of the node to be applied is designed to be analogous conical, and consequently by the depth of insertion, the width of the adhesive joint can be determined specifically.

However, in such a conical joint then a leveling of the end face of artificially set knot and pipe section by strong grinding etc. necessary, while in a cylindrical cut the axial lengths are aligned after insertion of the artificially placed node usually end on the face, and only for the purpose of optical alignment, a wiping across both the adhesive joint, and in the sequence preferably also the bulkhead surface of the artificially placed node takes place.

In order to make the relatively wide adhesive joint disappear visually as possible, the adhesive or filler material color additives are added, which correspond to the color of the parts to be bonded together.

If, on the other hand, no naturally grown knot of a bamboo cane is used as the artificial knot, but a foreign material, in particular in the form of a disc, in particular with a constant thickness, can itself be omitted from the inner circumference of the tube section. By simply adapting the outer contour of the disc to the inner contour of the pipe section at the desired application site, the disc can be inserted into the pipe section and fixed there by gluing, nailing or pegging, usually set back slightly from the free end of the pipe section to the bulkhead of a natural To simulate knots. In principle, this is also possible if a naturally grown bamboo knot is used for this, but in the sum then may result in a larger than the original existing wall thickness of the pipe section. 1

The existing at a natural node rounded transition between the bulkhead and the inner circumference of the pipe wall can be approximately achieved by the case as an artificial node to be used discs also have a curvature edge. Although this is somewhat reduced by decreasing the outer diameter for the purpose of adaptation to the inner diameter, but this would not be completely eliminated. A rounding of this transition by a moldable filler, such as wood putty or the like, in the appropriate coloring, would be possible.

This would also make an overly accurate adaptation of the outer contour of the disc to the inner contour of the tube superfluous, since existing joints through the putty, which must preferably be permanently elastic, is covered. Also, a nailing or pegging could take place from the inside, ie from the edge region of the disc into the inner circumference of the tube section, wherein this nailing or dowelling would also be covered by a joint putty and subsequently invisible.

If a gap running around on the outer circumferential surface of the pipe section is acceptable, a naturally grown, severed knot of a bamboo pipe can also be placed on the face side as an end of the pipe section to be prepared and fixed by gluing, pegging or nailing. This has the advantage that the natural bulge of a knot in the bamboo cane is maintained on the outer circumferential surface. As a disadvantage, the outer diameters of the starting knot used and that of the adjacent pipe section usually do not match exactly, and must be matched by grinding or other leveling measures to each other, which affects the surface structure.

c) embodiments

Fig. 1:

ein natürlich gewachsenes Bambusrohr mit dem gewünschten Abschnitt,

Fig. 2:

die vorbereitete Applizierungsstelle,

Fig. 3:

verschiedene künstlich zu setzende Knoten,

Fig. 4:

eine alternative Methode der Applizierung, und

Fig. 5:

eine weitere Methode der Applizierung.

Embodiments according to the invention are described in more detail below by way of example. Show it:

Fig. 1:

a naturally grown bamboo tube with the desired section,

Fig. 2:

the prepared application site,

3:

various knots to be set artificially,

4:

an alternative method of application, and

Fig. 5:

another method of application.

Fig. 1 shows the initial situation: From a bamboo tube 1, a certain intermediate section is required, whose length should be in the axial direction 10, the measure 16, at its two front ends by a node 2a, b ..., ie its bulkheads 11, should be closed and beyond should have a certain outer diameter, which is why the axial position in the entire bamboo tube 1, from which the desired section must be cut out, is roughly predetermined, since the bamboo tube over its length so has a slightly conical cross-section.

The exact axial position within the bamboo tube 1, from which the section 16 with the length 16 is to be cut out, can therefore usually be chosen so that the one end face, in Fig. 1, the left end side, by a naturally existing there node 2a and whose bulkhead 11 is closed as desired.

At the other end of the section with the predetermined length 16, however, there is usually no straight natural node 2c, but at one of the front ends, the tube 1 is open and must be closed by an artificially placed node 2 'there. In practice, however, the node 2a, which is naturally present at one end, is often also removed by puncturing its bulkhead 11 in order to prevent cracking by the existing bulkhead when the tubes are being dried. The pierced bulkhead is then replaced by a node also set artificially at this point, which has the advantage that at this point in addition, the outer circumference design of a natural node, so the posing of the outer periphery is present.

The setting of an artificial node 2 'is illustrated by the following figures:

2 show the sequence by means of which a naturally grown knot 2b of the same or another bamboo tube 1 'is set as an artificially set knot 2' in the desired bamboo tube 1, that is to say its portion with the length 16:

FIG. 2a shows that a naturally grown node 2b of a tube 1 'is selected as the knot 2' to be set artificially, whose original, natural outer diameter is the same or even slightly larger than the outer diameter of the tube 1 at the application site and / or before all whose wall thickness 8 is equal to or greater than the wall thickness 8 'at the application site. Such a naturally grown node 2b is separated from a tube 1 'as a section which is significantly longer than the axial length required to maintain the bulkhead 11, namely as a piece of pipe 3 cm to 10 cm in length.

In this form as section 1 ', the starting node 2b is slowly dried down, so that at the time of insertion of this node 2b in the tube 1, the two parts on the one hand have approximately the same moisture content, on the other hand, this moisture content in about the moisture content of the later site of the finished component corresponds.

For this purpose, the two parts - after drying to the final moisture - mechanically prepared as shown in Fig. 2b:

The node 2 'to be set artificially is shortened in the axial direction to such an extent that substantially only the region of the bulkhead 11' with the subsequent transitions into the conical inner diameter remains, ie to an axial length of 1 to 2 cm. Further, as shown in Figures 2 in the left half of the figure, the outer wall portions of the original wall thickness 8 of the starting node 2b are removed, for example by turning or grinding so that half or less than half of the original wall thickness 8 remains, and the resulting outer diameter 9 has an exact circular contour.

Similarly, at the provided for Applizierung end face end 3 of the tube 1, in which the artificial node 2 'is to be set over an axial length which is equal to or greater than the axial length of the knot to be set 2', the natural inner diameter 6 increases to a larger inner diameter 5 by means of z. B. a cutout. 7

The cutout 7 may have a rectangular cross-section, ie an end shoulder as Endanschlagsfläche 13, and a cylindrical, enlarged inner diameter 5 with exactly circular cross-section, even if the original natural inner diameter 6 - as well as the outer diameter of the tube 1 is not exactly circular was. Therefore, only such tubes 1 are used for these methods, which - at least at the point of application - deviate only slightly from the ideal circular shape as a cross-sectional contour.

The generated in the tube 1 enlarged, cylindrical inner diameter 5 is made larger by 0.4 mm to 2 mm than the generated outer diameter 9 of the artificially placed node 2 ', so that the remaining annular gap upon insertion of the node 2' in the cutout. 7 , as shown in Fig. 2c, an annular gap of 0.2 to 1 mm radial thickness remains, which is filled by adhesive 14, which is optionally also mixed with a filler. The adhesive or the mixture of adhesive and filler should be as elastic as possible in the radial direction in order to compensate for different strains of the tube 1 on the one hand and the artificially placed node 2 'on the other hand, especially in the radial direction.

Thereafter - as shown in Fig. 2c left side - when placing the artificially placed node 2 'on the end stop surface 13, the outer end faces 12, 12' of node 2 'and tube 1 in the longitudinal direction 10 terminate at the same point, so that only a refinement of the surface quality of this end face 12 including the visible end of the bulkhead 11 is necessary by grinding. If an alignment of the end faces 12, 12 'is not yet complete, this is also equalized by grinding.

In contrast, in FIGS. 2b and 2c in the right half, a variant is shown in which the outer diameter of the starting knot 2b is reduced to a slightly conical outer diameter 9 '. Again, the original wall thickness 8 is reduced on average by at least half. This is important in practice, since the wall areas behave completely differently in the case of fluctuations in the moisture content due to shrinkage than the area of the bulkhead 11, and these differences become less due to the radially inhomogeneous structure of the wall of a bamboo tube, the more external areas of the wall be removed.

In the same way, ie in particular with the same cone angle, the cutout 7 'of the inner diameter of the tube 1 is made conical at the Applizierungsstelle, in which case not necessarily an end shoulder of the resulting cutout 7' as in the form of an end stop surface 13 'be present got to:

Because the width of the bonding of the node 2 'in the tube 1 resulting gap, which is filled with the adhesive 14, can be varied due to the cone angle during bonding according to the depth of the axial insertion of the node 2' in the front end 3 of the tube 1.

This has of course the consequence that after the bonding, the end faces 12 and 12 'of the tube 1 and the artificially placed node 2' no longer aligned, but must be leveled by grinding or even sawing.

Fig. 3 shows variants of the knot 2 'to be set artificially, in which it is not made of a naturally grown node of a bamboo tube, but is an artificially produced disc 15 or 15' from a foreign material. It may be a plate-shaped disk 15 of the geometric shape, ie with the same thickness even to the outer edge, ie without the widening of the thickness of the bulkhead at the transition to the wall areas, which then from each desired plate-shaped Material and therefore made of stone, glass, plastic, metal, etc., can cut or punch out quite well from a corresponding plate-shaped starting material, ie with the same thickness.

The disk 15 ', however, has at least on the one axial end face on the natural outer contour of a grown bamboo knot, ie the widening of the thickness of the bulkhead 11 to the outside and the transition into a sleeve-shaped extending wall portion.

Such a mold can - for possibly several different, different outer diameter 9 - are prepared as a molding by this shape is milled either from a naturally grown material, for example, a disc naturally grown wood, as shown in the left half of the picture, in which case Fiber direction of the wood preferably in the longitudinal direction 10, the axial direction of the disc 15, should run, analogous to the fiber structure of a bamboo tube at the application site.

However, a simpler and more cost-effective production is the production of this molding by pressing into a mold, for. B. by pressing and bonding of wood particles.

This can - analogous to the known medium-density fibreboard (MDF) as wood semi-finished a very fine-pored, no longer be recognized as a press plate, surface structure can be achieved by the very fine ground as in the known MDF panels for a pressed wood particles and the other again have a smaller particle size in the visible surface areas than in the inner area, so that even a subsequent grinding of the visible end face of the bulkhead 11 can be saved.

The outer circumference 9 of the knot 2 'to be placed artificially is not produced as smoothly as possible, regardless of the method of production, but is deliberately left roughened with a surface roughness of at least one, preferably several tenths of a millimeter up to 0.5 mm in order to improve the subsequent bonding of this surface with the inner diameter of the tube 1.

FIG. 4 shows the simplest method of attaching an artificial knot 2 'by placing a natural knot 2 cut out of the same bamboo tube 1 or another bamboo tube in a substantially planar manner on the end face of the desired bamboo tube section 1 and adhering it there, Pegging or the like is fixed.

In Figure 4, this fixing is supported by a paragraph-shaped Abdrehung 17 of the outer peripheral portion of the bamboo tube section 1 of the free end face 12 ago, and an analogous reverse Innenausfräsung in the wall thickness 8 of the artificial node 2 '.

As a result, artificial node 2 'and bamboo tube section 1' fit one another in a form-fitting manner in transverse direction, so that transverse forces to be absorbed need not only be absorbed by the adhesion of an existing bond or the effect of dowels.

However, such a positive connection by means of a paragraph is not necessary, but also the placement of flat end faces 12 of node 2 'and bamboo tube section 1 to each other is possible.

On the one hand, this method has the advantage that the bulge 18 is present again in the outer circumference of a bamboo tube at the location of a natural nodule 2, which accommodates a natural visual appearance.

A disadvantage is the annular outer circumferential and depending on the size more or less easily visible annular groove 19 between the actual pipe section 1 and the patch node 2 '.

FIG. 5 shows another simple method of setting an artificial knot 2c: a simple disc 15, appropriately sized from its outer circumference, of material of the same thickness everywhere, at the desired location in the open cross-section at the end of a bamboo tube section 1 as artificial knots 2 to be set ' brought in:

This can be according to the left half of the figure in Figure 5 immediately outside an originally present, natural node 2a whose bulkhead had been previously pierced for the purpose of crack-free drying, or at an arbitrarily far away from a natural node 2a location, as in the right Half of the figure 5 shown. The connection is made either by means of adhesive 14 between the correspondingly adapted outer peripheral surface of the disc 15 and the inner diameter of the bamboo tube section 1, and / or by the hammering of a nail or dowel 20 for connecting the disc 15 and bamboo tube section 1, for example from radially outside through the bamboo tube section 1 or obliquely inwardly from the disc 15 ago.

By placing directly on an originally existing node 2a, the position of the artificially placed node 2 'at least approximately coincides with the bulge 18 of the natural node 2a apparent on the outer circumference of the tube 1 and is therefore visually inconspicuous.

Unnaturally acts at a everywhere the same thick disk 15, only the sharp-edged transition between the outer edge of the disc 15 and the inner circumference of the bamboo tube section 1, but this can be minimized by discs 15, the outer periphery towards at least one side bulging, have greater thickness, as shown in the left half of Figure 5. The advantage of this method is the low workload, since in this case only the adaptation of the outer periphery of the disc 15 in diameter and roundness or out-of-roundness is necessary, and can even be dispensed with the milling of the inner diameter of the pipe section 1.

LIST OF REFERENCE NUMBERS

1

Bamboo section

2, 2 '

node

3

Front end

4

Outer layer

5

Larger inside diameter

6

Natural inner diameter

7, 7 '

countersink

8, 8 '

Wall thickness

9

Outer diameter reduced

10

longitudinal direction

11

bulkhead

12

face

13

end stop

14

Glue

15

disc

16

length

17

Abdrehung

18

upheaval

19

ring groove

20

dowel

Claims (16)

1. A bamboo tube segment (1) in particular with a naturally grown node (2a),
   characterized in that
   the bamboo tube (1) has at least one artificially placed node (2')
2. A bamboo tube according to claim 1,
   characterized in that

   - the artificially placed node (2') is a naturally grown node (2b), that is affixed in a predetermined axial position to the bamboo tube (1), and/or in particular

   - the artificially placed node (2') is placed in the bamboo tube segment (1), close to, in particular at its front face (3), and in particular in the interior of the tube (1), and/or in particular

   - the artificially placed node (2') is a naturally grown node, located and affixed in the interior of the base tube, and/or in particular

   - the artificially placed node (2') is a naturally grown node (2b), whose exterior radial layers (4) were removed.
3. A bamboo tube according to one of the preceding claims,
   characterized in that

   - the artificially grown node (2') is inserted and secured, in particular glued, into an interior diameter (5), larger than the natural interior diameter (6) of the base tube (1), which was created from the front face (3), in particular by milling, and/or in particular

   - the bulkhead (11) of the artificially placed node (2') is intact, and/or in particular

   - the milled recess (7) in the bamboo tube for the artificially placed node (2') is cylindrical, and/or in particular

   - the milled recess (7') in the bamboo tube for the artificially placed node is conical
4. A bamboo tube according to one of the preceding claims,
   characterized in that

   - the artificially placed node (2') originates from the same bamboo tube (1), into which it is subsequently inserted in a different position, and/or in particular

   - the wall thickness (8) of the tube, from which the node (2b) originates for utilization as an artificially placed node (2') is equally thick, or thicker than the wall thickness (8') of the base tube (1) at the respective position, and/or in particular

   - only such tubes are utilized as base tubes (1), whose cross section deviates from a circular shape by less than 15%, in particular by less than 10%, in particular less by than 5% in the radial dimension, and/or in particular

   - the artificially placed node (2') has prior to insertion into the base tube (1) essentially the same humidity content, in particular does not exceed a 10% humidity differential by weight, in particular does not exceed 5% humidity differential by weight, in particular does not exceed 3% humidity differential by weight relative to the base tube (1) at the time of insertion.
5. A bamboo tube according to one of the preceding claims,
   characterized in that

   - the exterior diameter (9) of the artificially placed node (2') is smaller upon insertion into the recess of the base tube, in particular smaller by 0.1 mm to 0.9 mm, in particular smaller by 0.3 mm to 0.6 mm, and/or in particular

   - the artificially placed node originates from a bamboo tube other than the base tube (1), in particular from a bamboo tube of larger exterior diameter, and wherein the material removal from the artificially placed node (2') in radial direction is greater than the remaining wall thickness (8) at the milled section of the base tube, and/or in particular

   - the material removal from the wall thickness of the artificially placed node (2') in radial direction is more than half of the wall thickness (8) of the initially placed node (2'), and/or in particular

   - the artificially placed node (2') has the exterior of its front face (12) ground and/or polished.
6. A bamboo tube according to one of the preceding claims,
   characterized in that

   - the milled recess (7) in the base tube has an axial stop (13), and/or in particular

   - an adhesive (14), that remains elastic after setting, is utilized for gluing the artificial node (2') into the base tube (1), and/or in particular

   - the adhesive layer (14) has a thickness at least 0.2 mm, in particular at least 0.5 mm, in particular at least 1.0 mm, and/or in particular

   - the milled recess (7) in the receiving tube has the least possible diameter, that still allows for a milling over the full circumference.
7. A bamboo tube according to one of the preceding claims,
   characterized in that

   - the tube from which the artificially placed node (2') is taken, is selected in a size, so that the outer wall layers of the node (2') require extensive removal in order to achieve the target outer diameter required for the insertion into the base tube (1), and/or in particular

   - a disc (15) made from wood, in particular of naturally grown wood, in particular with its grain running perpendicular to the principal plane of the bulkhead, or made from compressed and glued wood particles, is used as an artificially placed node (2'), and/or in particular

   - a disc (15') made from metal, in particular stainless steel or aluminum, glass; stone, or plastic is used as an artificially placed node (2').
8. A process for outfitting a bamboo tube segment (1) with an artificially placed node (2'), in particular in the end section of a bamboo tube (1),
   wherein

   - the interior diameter (5) is increased through milling (7) or drilling from the front face (3) of the tube (1), and shaped into a circular contour, and

   - one node is artificially placed (2'),

   - wherein the outer circumferential layers (9) of the node to be artificially placed are removed, in particular by more than half the wall thickness (8), so that a round outer contour with a reduced outer diameter (9) is created, and

   - the artificially placed node is inserted into the milled recess (5) of the base tube (1), where it is secured, in particular glued.
9. A process according to claim 8,
   characterized in that

   - a natural node (2b) is excised as a tube segment from a bamboo tube (1) for use as an artificially placed node (2'), and/or in particular

   - through milling or drilling of the interior diameter (5) of the base tube (1) at least 30%, better approximately 50%, in particular at least 50% of the wall thickness (8') of the base tube (1) are removed, and/or in particular

   - the natural node (2b) that is to be utilized as an artificially placed node (2') is excised as a tube segment measuring at least 3 cm in length, in particular at least 5 cm in length, in particular at least 8 cm in length, and/or in particular

   - the naturally grown node (2b) that is to be utilized as an artificially placed node (2') is initially dried as a tube segment, in particular to the same humidity content as the base tube, in particular deviating in humidity by no more than 10% by weight, in particular by no more than 8%, in particular by no more than 3% by weight, and/or in particular

   - subsequently the front face (12) of the base tube (1) and the node (2') artificially placed and fixated therein are ground over together, and in particular also the bulkhead surface (11) of the artificially placed node is ground.
10. A process according to one of the preceding process claims,
    characterized in that

    - the drying process of the natural nodes (2b), that are to be placed as artificial nodes, is undertaken at a slow pace over a drying period of at least 10 days, in particular of at least 2 weeks, in particular of at least 3 weeks, and/or in particular

    - after drying and removal of the exterior circumferential layers the natural base node (2b) is trimmed to the designated axial length, in particular 1 cm to 3 cm, in particular 1 cm to 2 cm, and/or in particular

    - the removal of the exterior circumferential layers of the base node (2b) is accomplished by turning, with the blade set against the grain in order to achieve a relatively coarse surface, and/or in particular

    - the insertion of the artificially placed node (2') into the base tube (1) is effectuated without applying pressure, in particular with clearance between the exterior circumference of the artificially placed node and the inner circumference of the base tube at the location of the application, and/or in particular

    - color pigments, in particular also a filler material, corresponding to the color of the parts to be glued (1,2') are added to the adhesive (14) being utilized.
11. A process for fitting a bamboo tube segment (1) with an artificially placed node (2'), in particular in the end section of a bamboo tube (1),
    wherein

    - the artificially placed node is inserted from the front face (3) of the tube (1) into the interior of the bamboo tube section (1) until the designated position is reached,

    - the artificially placed node (2') is anchored in that position through gluing, doweling and/or nailing.
12. A process according to claim 11,
    whereby

    - the disc or an implant node to be utilized as an artificially placed node (2') are adapted, with respect to their exterior circumference, to the interior contour of the tube segment (1).
13. A process according to claim 11 or 12,
    characterized in that

    - after securing the artificially placed node (2'), the fillet at the transition between the artificially placed node (2') and the interior circumferential surface of the tube segment (1) is smoothed with a rounded contour and covered with a formable, in particular permanently elastic filler, in particular wood putty.
14. A process according to one of the preceding claims 11 through 13,
    characterized in that

    - the doweling or nailing is disposed within in the area covered by the filler, thus in the fillet.
15. A process for outfitting a bamboo tube segment (1) with artificially placed nodes (2') near the respective ends of the bamboo tube segment (1),
    wherein

    - all naturally occurring nodes (2) of the bamboo tube segment (1) are at least partially removed,

    - the bamboo tube segment (1) is dried to the designated residual humidity,

    - after trimming the bamboo tube segment (1) to the desired length (16), artificially placed nodes (2') are applied to the respective end section of the bamboo tube segment (1), thereby closing the interior diameter of the tube segment (1).
16. A process according to claim 15,
    characterized in that
    at least one of the artificially placed nodes (2') is less distant from the front faces, than the first one of the respective naturally occurring nodes from the front face.

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