EP1699986B1 - Wood wall construction made of wooden beams - Google Patents

Abstract

Wooden wall construction comprises wooden beams (1) connected to each other by screws (2) having thread sections (3, 4). The length (C) of the screws are less than the height (B) of one wooden beam. Preferred Features: The screws protrude on both sides of a bearing region (5) into the wooden beams. Two wooden beams are turned parallel to each other in the bearing region of two wooden beams. The screws have a thread over its whole shaft length.

Description

The invention relates to a wooden wall construction in blockboard construction, wherein stacked and optionally adjacent wooden beams are connected to each other by means of screws which bridging the mutual contact area of two wooden beams are screwed from the top or bottom of the two wooden beams and only over part of the Height or thickness of each wooden beam are guided.

In the construction of such a wooden wall structures in blockboard construction, the stacked wooden beams are connected by screws, a problem is, of course, that the screws due to the volatiles resulting from shrinkage and swelling permanently ensure no positive connection. The Utility Model DE 299 20 853 U1 , from which a wooden wall construction of the type mentioned is known, provides to eliminate the above problem, to provide each screw below the head with a coil spring, which produce by screwing and countersinking of the screw thread a permanent pressure and thus ensure absolute strength of the beam wall , At least because of this coil spring must be predrilled in the known wood wall construction of each screw hole for receiving this coil spring.

Another known embodiment provides ( EP-0787866B1 ), that in each case matched to a layer of wooden beams machine screws are inserted into predrilled holes, wherein the screws are operatively connected by threaded holes are provided in the head of the screws into which the threaded end of the shank of the next screw can be screwed , It is formed by a kind of continuous mounting rod, the head of each screw is supported respectively at the top of a wooden beam.

From the DE 198 28 275 A1 is a block plank known for the construction of wooden houses. When two such logs are superimposed and bolted together, a hole is predrilled for each bolt, acting as a through hole extends completely through the upper plank, so that thread of the screw engages only in the lower plank.

From the DE 100 13 810 A1 is known a carrier made of wood with loaded on Querzug sections. Such sections are particularly effective in the area of cutouts or openings of the wearer. To accommodate the transverse tensile load, transversely to the longitudinal direction of the carrier used extending rod-shaped elements are present, which are formed by screws. These screws are screwed from the top or from the bottom of the carrier and each lead only over part of the height of the carrier and are thus directly assigned to the loaded on Querzug zone. This prior art thus relates only to a single wooden beam, but not its connection to another wooden beam.

From the German Utility Model DE 93 07 029 U1 It is known to connect outer wall block boards by means of cross nailing with each other.

The present invention has for its object to provide a wooden wall construction using screws, which is quick and easy to manufacture and in which an optimal attachment of the supported wooden beams can be done.

According to the invention, this is achieved in that the wooden beams are connected to each other by at least at its two end portions with threaded portions screws which are screwed without pre-drilling and only over part of the height or thickness of the wooden beam and thus intervene only in the immediate mutual contact region of the two wooden beams , wherein the length of the screws is formed smaller than the height of a wooden beam.

The screws engage according to the invention only in the immediate mutual contact region of the two wooden beams and are screwed in without pre-drilling. There are only much shorter screws necessary, which are therefore particularly deeply sunk. Due to the much shorter screws to be used a special material and therefore cost savings can be achieved. In addition, the insertion torque is substantially reduced compared to a long screw by the much shorter shaft with a thread. Due to the much shorter dimensions of the screws used in the invention also results in a faster and shorter set time. The creation of a wooden wall construction is much easier and faster by the inventive measures. In particular, this ensures that the compound retains its efficiency even in the volume changes of the wood parts to be joined due to shrinkage and swelling. The compound remains stiff even after multiple fading and swelling of the wooden beam.

In this context, it is advantageous if the screws protrude on either side of the mutual contact area approximately equally far into the adjoining wooden beams. It is therefore always ensured a sufficient mutual attachment of two superimposed wooden beams. In both wooden beams, the screws are anchored in the same way.

The simplest type of mutual connection of wooden beams is that in the mutual contact area of two wooden beams in each case at least two screws are screwed at a distance approximately parallel to each other aligned.

A design variant provides that the screws are threaded over their entire shaft length. This can be advantageous for manufacturing reasons. The transmission of tensile forces can be improved by a longer thread engagement.

Furthermore, it is provided that the screws have an inner tool engagement at their one end, wherein the diameter of the portion of the screws surrounding this inner tool engagement is approximately equal to or only slightly larger than the outer diameter of the thread. In this way, it has become possible without a particular increase in the insertion torque to sink the screws without pre-drilling a hole so far that the screws engage only in the immediate mutual contact region of the two wooden beams.

The inventive type of mutual attachment of wooden beams in the construction of wooden wall structures also allows the simple sealing of the mutual investment area between two wooden beams. For this reason, it is also provided that the screws are inserted between arranged on the edge regions of the mutual abutment region of the wooden beams or inserted strip-shaped sealing materials.

A variant provides that the screws are screwed in at right angles to the longitudinal extent of the wooden beams. Thus, the shortest Eindrehstrecke is given.

Another possibility is given when the screws are screwed in at an acute angle to the longitudinal extent of the wooden beams. As a result, even higher tensile and compressive forces can be transmitted in the mutual connection. The shear forces to be transmitted, ie the forces acting in the horizontal direction, can be dimensioned considerably higher.

In this context, it may be advantageous if the screws are both at right angles and at an acute angle to the longitudinal extension of the wooden beams, optionally alternately sequentially, screwed. Depending on the required power transmission can thus be used the most optimal solution.

In this case, an additional possibility is that the screws are each screwed in pairs crossing each other at an acute angle to the longitudinal extent of the wooden beams or transversely to this. It is quite conceivable that the intersecting screwed screws are also at an acute angle to the vertical center plane of the wall made of wooden beams wall construction lying vertical planes.

Fig.1 bis Fig. 3

Vertikalschnitte durch übereinander geschichtete Holzbalken verschiedener Querschnittsformen, welche durch Schrauben miteinander verbunden sind;

Fig. 4 bis 6

Seitenansichten von aus Holzbalken gebildeten Holzwandkonstruktionen, bei welchen die Schrauben in verschiedener Art eingedreht sind.

Embodiments of the invention are explained below with reference to the drawing. Show it:

Fig.1 to Fig. 3

Vertical sections through stacked wooden beams of various cross-sectional shapes, which are interconnected by screws;

4 to 6

Side views of wood beam formed wooden wall constructions in which the screws are screwed in various ways.

In the shown wood wall construction in log construction wooden beams 1 are stacked and the successive wooden beams 1 are connected by means of screws 2 together. The wooden beams 1 are connected to each other by at least at its two end regions with threaded portions 3 and 4 provided screws 2. These screws 2 are the mutual investment area of two wooden beams 1 bridged from the top or the bottom of the wooden beam 1 screwed without pre-drilling a hole and are only over a part A of the height or thickness B of the wooden beam 1. Thus, the screws 2 are assigned only to the directly mutual contact area 5 of two wooden beams 1.

The screws are thus screwed without Vorzubohren, so that a significant reduction in the assembly time occurs. The screws 2 can be provided only in the region of its two ends with a threaded portion 3 and 4. But it is also conceivable to provide a continuous thread over the entire shaft length. In the context of the invention, different thread forms, different thread pitches and different ratios between core diameter and outer thread diameter are possible. The training and mode of action to be formed on a free end drilling and / or Eindringpitze can be performed in various ways. The shape of the screw head is variable, but is to be designed so that it can be brought into the deeply recessed position within the wooden beams without any special problems. It is also conceivable that in the case of two threaded sections these have a different thread pitch. Although thereby the insertion torque is substantially increased when screwing in the first wooden beam 1, it can be achieved that when engaging the screws 2 in the two superimposed wooden beams 1, these are tightened against each other, thereby increasing the mutual contact force. Of course, a surface coating is also advantageous for the screws used here. In particular, a coating which reduces the insertion torque of the screws 2 is suitable. Such a coating can also be applied in addition to a corrosion protection coating or it can also emanate from this anti-corrosion coating at the same time the torque-reducing effect.

The screws 2 protrude on both sides of the mutual contact area 5 approximately equally far into the adjoining wooden beams 1. The length C of the screws 2 is formed smaller than the height B of a wooden beam. 1

In the mutual contact area 5 of two wooden beams 1, two or more than two screws 2 are screwed in each case at a distance approximately parallel to one another.

There is the possibility of screwing the screws 2 at right angles to the longitudinal extent of the wooden beams 1 or at an acute angle to the longitudinal extent of the wooden beams 1 (see FIGS. 5 and 6). Depending on the requirement of the mutual connection of wooden beams 1, therefore, the cheapest type of connection can be selected. It is therefore also possible to rotate the screws 2 alternately successively, both at right angles and at an acute angle to the longitudinal extension of the wooden beams 1. Furthermore, a variant provides, the screws 2 in pairs each other to turn crosswise at an acute angle to the longitudinal extension of the wooden beams 1.

The screws 2 have at their one end an inner tool attack 6, wherein the diameter of the inner tool engagement 6 surrounding portion of the screws 2 is approximately equal to or only slightly larger than the outer diameter of the thread.

The screws 2 can be screwed in with a screwdriver bit whose shaft adjoining the engagement region for attachment to the screw 2 or an imaginary enveloping cylinder of this shaft has a diameter which is equal to or smaller than the diameter of the section of the screw 2 surrounding the inner tool attack 6. Further, this shaft has a length for bridging the range of height B of the wooden beam 1 from the Innenwerkzeugangriff 6 of the screw 2 to the upper or lower limit and further to the screwdriver bit. As a result, a proper drive of the screws can be accomplished until the final setting position, without an additional torque increase is caused by the screwing forth.

The screws 2 are - if strip-shaped sealing materials 7 are used - arranged between inserted at the edge regions of the mutual contact region 5 of the wooden beams 1 sealing materials 7.

The cross-sectional shape of the wooden beams is to be designed in a variety of ways when using the measures according to the invention. Thus, wood wall constructions can also be formed according to the nature of the logs provided in nature. Also on various cross-sectional shapes sawn wooden beams 1 with or without mutual groove and comb training can be used here.

In Fig. 1, three holes 8 are visible, which have been prepared by screwing the screws 2. 2 and 3 corresponding holes 8 are visible. As shown in FIGS. 2 and 3, the bores 8 seem to be arranged one above the other in line, but in fact the bores 8 of one beam are offset by one piece relative to the bores 8 of the next beam, as shown in FIGS. 6 can be seen.

Claims (11)

1. A timber wall structure of the block-board mode of construction, wherein timber beams, which are stacked one on top of another and optionally are situated adjacent one another, are joined together by means of screws which are screwed in spanning the mutual contact zone of two timber beams from the upper side or the under side of the two timber beams and are guided only over part of the height of the thickness of each timber beam, characterised in that the timber beams (1) are joined together by screws (2) which at least on their two end portions are provided with threaded sections (3,4) and which are screwed in without predrilling and engage only in the immediate mutual contact zone (5) of the two timber beams (1), wherein the length (C) of the screws (2) is smaller than the height (B) of a timber beam (1).
2. A timber wall structure according to Claim 1, characterised in that on either side of the mutual contact zone (5) the screws (2) project approximately to the same extent into the mutually abutting timber beams (1).
3. A timber wall structure according to Claim 1 or 2, characterised in that in the mutual contact zone (5) of two timber beams (1) in each case two screws (2) are screwed in aligned approximately parallel to one another.
4. A timber wall structure according to any one of Claims 1 to 3, characterised in that the screws (2) are provided with a screw-thread over their entire shank length.
5. A timber wall structure according to any one of Claims 1 to 4, characterised in that at one end the screws (2) have an internal tool engagement portion (6), wherein the diameter of the portion of the screws (2) surrounding this internal tool engagement portion (6) is approximately the same size as or is only slightly than larger than the outer diameter of the screw-thread.
6. A timber wall structure according to any one of Claims 1 to 5, characterised in that the screws (2) are inserted between strip-like sealing materials (7) arranged or inserted at the edge zones of the mutual contact zone (5) of the timber beams (1).
7. A timber wall structure according to any one of Claims 1 to 6, characterised in that the screws (2) are screwed in at a right angle to the longitudinal extension of the timber beams (1).
8. A timber wall structure according to any one of Claims 1 to 6, characterised in that the screws (2) are screwed in at an acute angle to the longitudinal extension of the timber beams (1).
9. A timber wall structure according to any one of Claims 1 to 6, characterised in that the screws (2) are screwed in both at a right angle and at an acute angle to the longitudinal extension of the timber beams (1).
10. A timber wall structure according to Claim 9, characterised in that the screws are screwed in alternately in sequence.
11. A timber wall structure according to any one of Claims 1 to 6 and 9, characterised in that the screws (2) are screwed in respectively in pairs intersecting one another at an acute angle to the longitudinal extension of the timber beams (1) and transversely thereto.

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