DK2216455T3

DK2216455T3 - Connection means to a træforbindelse, træforbindelse and process for its preparation

Info

Publication number: DK2216455T3
Application number: DK10152505.3T
Authority: DK
Inventors: Henning Ernst
Original assignee: Gaisbach Schraubenwerk Swg
Priority date: 2009-02-06
Filing date: 2010-02-03
Publication date: 2014-03-03
Also published as: EP2216455A3; PL2216455T3; DE102009008720A1; EP2216455A2; EP2216455B1

Description

1

Description

The invention relates to a connection element for the wood concrete composite.

Apartment ceilings are frequently produced in the form of what is referred to as a wood concrete composite. Concrete ceilings rest here on wooden beams to which said concrete ceilings have to be connected. A wood concrete composite combines the favourable properties of each of the two building materials. The wood concrete composite results in increased rigidity and, in doing so, meets increased requirements for proof of the fitness for use for apartment ceilings.

There are various building-approved connectors for transmitting the shearing force in the shear joint between the concrete component and the wooden beam. These also include fully threaded screws. The latter are screwed into the wooden constructions. The wet concrete is subsequently applied to the wooden constructions. When the concrete sets, that part of the screw which protrudes from the wooden construction is connected to the concrete. There are basically currently two different methods for producing such a composite. The one alternative consists in completely producing the element from concrete and wooden beams at the factory and subsequently transporting them as one piece and fitting them at the building site. In this case, the joinery, namely the cutting of the wood to size, and the concreting work have to be carried out by a single company.

The second alternative consists in preassembling the wooden construction at the building site. The reinforcement is subsequently introduced, the ceiling is supported and the concrete applied wet. This leads to downtimes at the building site, requires the coordination of the individual trades, leads to moisture in the wooden construction and to the soiling of possible visible constructions. A fastening element for fastening a wooden beam on a concrete sleeper is already known, in which an angled stud is concreted into the concrete sleeper, 2 said stud being provided with a thread at the end thereof which protrudes from the concrete sleeper (US 3,852,931).

An insert element for producing screw channels in a planar concrete element is likewise known, in which four tubes running obliquely are fitted on a metal plate. A screw is screwed through each of the tubes (DE 10 2006 043 209 A1).

Furthermore, it is known to screw a screw through a first tube and then to place a second, larger tube onto the screw which has been screwed in (DE 10 341 401 A1).

The invention is based on the object of providing a possibility of being able to realize the wood concrete composite more rapidly and simply.

In order to achieve this object, the invention proposes a connection element with the features of Claim 1, a wood compound containing such a connection element and a method for producing a wood concrete composite. Developments of the invention are the subject matter of dependent claims.

The connection element is a very simply constructed element which is very simple to use. It serves to absorb and to transmit the shearing forces of the shear joint. The disc element forms, around the hole present therein, a contact surface for the lower side of a stud-like fastening element, for example a screw. The mounting serves to secure the disc element during the production of the concrete layer. After the concrete layer has been produced and cured, the disc element is secured by the concrete layer itself. The channel-forming means serves to keep a space free from the concrete. Said space which passes from the upper side of the concrete element as far as the lower side thereof serves for the insertion of the connection element. For the sake of simplicity, said space is referred to here as a screw channel, even if the connection element does not absolutely need to be a screw. 3

For example, the channel-forming means can be a tube which remains in the concrete after the concrete has cured.

Provision can be made for the channel-forming means to be at least partially part of the mounting for the disc element. A further possibility proposed by the invention consists in that the mounting, at least in the region of the channel to be formed, is composed of an easily destructible material. The region of the channel is then not empty after the curing, but rather is filled with a material. Since, however, the material is easily destructible, the screw channel can subsequently be opened by the insertion of the connection element. An example of a suitable material for this is Styrodur.

Another possibility which is proposed by the invention can consist in that the channel-forming means has a separate structural element which is insertable releasably into the hole in the disc element and which is pulled out after the concrete layer has cured. In particular, it can be provided in a development that said separate structural element is a pin with two sections of different diameter.

The pin, the first cylindrical section of which has a diameter which is larger than the hole in the sheet-metal element, serves to produce the channel, through which the fastening element can be inserted and through which a tool can be brought into engagement with the fastening element, in the concrete. The diameter of said pin and therefore the diameter of the channel to be produced therefore has to be at least the same size as the diameter of the head of the fastening element to be used later.

The length and the dimensions of the pin are selected such that whenever the end of the section with the smaller diameter is arranged in the plane of the lower side of the concrete part to be produced later, the upper end reaches at least as far as the upper side of the concrete part to be produced. 4

According to the invention, it can be provided that the transition between the two sections of the pin corresponds to the shape of the lower side of the head of the fastening element.

The pin is intended to be pulled out again after the concrete element has been produced. Said pin therefore has to be connected releasably to the sheet-metal element. Since the pin predetermines the direction of the fastening element to be inserted later, a fixing device can be provided according to the invention, said fixing device fixing the pin in the aligned position with respect to the sheet-metal element and therefore with respect to the lower side of the concrete element to be produced.

Said fixing device can be effective, for example, between the edge of the hole in the sheet-metal element and the pin. A type of thread can be involved.

According to the invention, it can be provided that the free end of the section of the pin with the smaller diameter is of flat design, and therefore the hole produced by the pin passes completely through as far as the lower side of the concrete element.

In order correctly to position the sheet-metal element with respect to the concrete part to be produced, a holder can be provided. Said holder can in particular also have a mounting for the pin itself, and therefore the fixing device for the sheet-metal element is present on said holder.

In particular, a screw is suitable as the fastening element.

It is expedient, because shearing forces are transmitted, to orient the sheet-metal part in such a manner that the screw bearing against a contact surface thereof runs obliquely to the separating plane or connection plane between the concrete part and the wooden beam. In order to facilitate such an orientation, it can be provided according to the invention that the sheet-metal part is of two-part design, with the part having the hole being bent down or away with respect 5 to the remaining part. The part not having the hole can then be oriented parallel to the lower side of the formwork or the concrete part to be produced with the aid of the formwork. This is simpler than maintaining an angle between said lower side and the sheet-metal part.

In order to be able particularly expediently to insert the connection element with the threaded screws which are customarily provided with a countersunk head, the invention proposes, in a development, to provide the contact surface of the sheet-metal element, which contact surface is formed around the hole, with a countersink. It is also expedient in this case if the transition of the pin between the part with the larger diameter and the part with the smaller diameter is of conical design in the same manner.

In a development of the invention, the mounting which is required essentially only during the production of the concrete layer can also be realized in a common component together with the disc element.

According to the invention, the connection element can be configured in such a manner that the channel-forming means is removed after the concrete has set. The pin which has been mentioned serves as an example for this purpose. However, it is likewise possible and is proposed by the invention that the channel-forming means remains as part of the connection element after the concrete has set. For this purpose, use can be made of tubular sections. For example, it can be provided that the channel-forming means is formed above and/or below the disc element by a tubular section. Said tubular section can be composed, for example, of plastic. It is possible to connect the two tubular sections to each other and/or to the disc element. This makes it possible to match the length of the channel-forming means to the thickness of the concrete slab.

The invention likewise proposes a wood concrete composite in which a concrete element rests in a planar manner along a connection surface on at least one wooden construction. The concrete element contains at least one connection element, preferably a multiplicity of connection elements, through the disc ele- 6 ment of which fastening elements engage in the wooden constructions. This results in a shearing-proof connection between the wooden construction and the concrete element.

The connection elements here can be arranged in such a manner that the fastening element runs obliquely or else perpendicularly to the connection surface between the concrete element and the wooden construction. In the case of a multiplicity of connection elements, it may be expedient to combine these possibilities with one another.

The disc element can either be at a distance from the connection surface, or, if said disc element is composed of non-corroding material, can also be located in the connection surface.

The method proposed by the invention can proceed as follows. At least one connection element, preferably a multiplicity of connection elements, is introduced into a formwork for producing a concrete element at the locations where the connection to wooden beams is intended to take place later. This is undertaken, for example, with the aid of the mounting. Concrete is subsequently cast into the formwork. After the concrete has set, the concrete element is placed onto a wooden construction, a fastening element is inserted into the screw channel and through the hole in the disc element of the connection element and is introduced into the wooden construction and is connected to the latter there.

The concrete element is preferably produced at a factory, while the connection of the finished concrete element to the wooden construction is carried out at the building site.

In order to produce the screw channel, use can be made, for example, of a pin which is inserted into the hole in the disc element before the concrete is cast in and which reaches as far as the lower side of the concrete part to be produced and, on the upper side, also as far as the boundary surface of the concrete part. The oin can also protrude at this point. The concrete is subsequently poured in 7 and there is a wait until the concrete sets. After the latter has set, the pins are pulled out either already at the factory or at the building site.

The finished concrete slabs are then transported to the building site and placed onto the previously finished wooden constructions. The fastening elements are inserted into the channels formed by the pins and are connected through the channels to the wooden constructions.

The axis of the channel can run, for example, perpendicularly to the connection surface between the concrete element and the wooden construction.

However, it is likewise possible and lies within the scope of the invention for the axis of the channel to run obliquely with respect to the connection plane between the concrete element and the wooden construction.

According to the invention, it can be provided that the sheet-metal elements are provided with mountings which are composed, for example, of plastic, and that said mountings are placed together with the sheet-metal elements inserted previously therein into the formwork. Said mountings can also serve to ensure the correct alignment of the pins.

The screw channel is also formed by the screw being pushed from above into the material of the mounting and, in the process, clearing its path itself through the mounting.

If a connection element with a channel-forming means in the form of a tube is used, the screw channel is therefore already finished after the concrete has set. The connection element proposed by the invention is suitable for pre-manufac-tured concrete slabs in thicknesses from 6-7 cm. The finished concrete slabs here are placed onto the wooden constructions and are connected to the wooden construction via fully threaded screws, partially threaded screws or other stud-like connecting means. The connection of the individual elements is pro- 8 duced by the subsequent screw connection. This alternative has a plurality of advantages over the conventional methods.

The assembly of the wooden constructions can largely take place independently of the concreting work.

An additional support during the fitting of the concrete slabs is not required, since the connection can be produced immediately as the slabs are placed on.

Downtimes due to concrete setting times no longer arise at the building site itself.

The concrete slabs including the connection elements can be produced in prefabricated-part factories, delivered to the building site and laid directly.

Moisture no longer arises because of the concrete being applied at the building site.

The timber construction company at the building site can take on the coordination of the production of the elements.

Soiling of the wooden constructions due to the concrete work no longer occurs. Concrete slabs having a finished lower layer can be used.

Continuous girders can be used.

Further features, details and advantages of the invention emerge from the claims and the abstract, the wording of both of which is incorporated by reference into the content of the description, and from the description below of preferred embodiments of the invention and also with reference to the drawing, in which: 9

Figure 1 shows a sheet-metal part of a connection element according to the invention;

Figure 2 shows the side view of a pin belonging to the sheet-metal part;

Figure 3 shows the arrangement of the connection element with a pin;

Figure 4 shows a cross section through part of a wood concrete composite in a first direction;

Figure 5 shows a cross section through part of a wood concrete composite in a second direction;

Figure 6 shows the side view of a mounting for a connection element;

Figure 7 shows the view from the left of the mounting in Figure 6;

Figure 8 shows a perspective illustration of a connection element of a further embodiment;

Figure 9 shows an illustration corresponding to Figure 8 of another embodiment;

Figure 10 shows another embodiment;

Figure 11 shows an illustration corresponding to Figure 4 of a further embodiment;

Figure 12 shows the arrangement of Figure 11 with a spacer;

Figure 13 shows a view of the fitting element of Figure 11 from the right in Figure 11; 10

Figure 14 shows a view of the fitting element of Figure 11 from the left in Figure 11;

Figure 15 shows a schematic side view of a further connection element;

Figure 16 shows a side view of another connection element;

Figure 17 shows a view of the connection element of Figure 16 from the bottom right in Figure 16;

Figure 18 shows the perspective view of a further embodiment similar to Figure 16;

Figure 19 shows the perspective view of part of the connection element of Figure 18;

Figure 20 shows an axial section through the connection element of Figure 18.

First of all with regard to Figure 1. A sheet-metal element 1 which has an approximately rectangular shape is illustrated here. A bend 3 is formed between the two longitudinal sides 2 of said sheet-metal element, the bend running obliquely to the two longitudinal sides 2. A hole 4 is formed on one side of said bend 3 approximately in the centre of said part. The hole 4 is surrounded by a countersink 5. The sheet-metal part 1 is bent around the bend 3, with the right-hand part in Figure 1 that has the hole 4 forming an angle of approximately 45° with respect to the left-hand part which does not have a hole. Since the angling takes place about a bending line 3 running obliquely, the plane of the right-hand part forms an angle with respect to the left-hand part in two directions.

The connection element of the embodiment illustrated here not only includes the sheet-metal part which is illustrated in Figure 1, but also a pin 6 which is illustrated in Figure 2. Said pin 6 contains two cylindrical parts with a circular cross section which both have a different diameter. The lower part 7 of the pin 6 has a 11 diameter which is somewhat smaller than the diameter of the hole 4 in the sheet-metal element 1. The lower end of said part is cut off obliquely and forms a flat end surface 8. The other part 9 of the pin 6 has a diameter which is larger than the diameter of the hole 4. The diameter of this part 9 of the pin 6 corresponds to the diameter of the screw head of a screw which is intended to interact with the connection element. The outside diameter also corresponds to the outside diameter of the countersink 5.

The sheet-metal element 1 from Figure 1 is temporarily fastened in a formwork in the manner indicated in Figure 3. The left-hand part, which does not have a hole, of the sheet-metal element 1 is arranged here parallel to the lower side 10 of the concrete part to be produced and to the upper side of the formwork. The right-hand part, which has the hole 4, of the sheet-metal element 1 then already runs in the desired oblique position. The pin 6 is subsequently inserted from the upper side of the formwork into the hole 4. The pin is oriented here in such a manner that the end surface 8 thereof rests flat on the upper side of the form-work. Of course, the length of the pin 6 is selected in such a manner that the upper end 11 thereof protrudes over the upper side of the concrete part to be produced at least to an extent such that the hole opens out there. Furthermore, the pin 6 is coordinated with the arrangement of the sheet-metal element 1 in such a manner that whenever the end surface 8 of the section 7 of said pin lies in the lower side 10 of the concrete element to be produced, the transition between the two sections 7, 9 at the same time takes up the location where the lower side of the screw head later rests on the sheet-metal element 1.

Of course, a plurality of connection elements of this type are introduced into the formwork.

The concrete is subsequently cast into the formwork and there is a wait until the concrete has set. The pins 6 are then pulled out of the concrete part. This produces screw channels into which the screws can later be inserted. The pins 6 can be used as frequently as desired. 12

The concrete part produced in this manner is subsequently brought to the building site and placed onto the wooden beam construction. Of course, the connection elements have to be present in the concrete part at the locations under which the wooden beams are subsequently located. The countersunk head screws are now inserted through the screw channels and screwed down into the wooden construction. In the example just mentioned, wooden beams are used. The connection between concrete part and wooden constructions is also usable in the case of different types of wooden constructions, namely, in the case of planar wooden structural elements, stacked planks, plywood boards or the like.

The result of such an arrangement is illustrated in Figures 4 and 5. The section of Figure 4 shows a wooden beam 12 below a concrete ceiling 13. A plurality of connection elements, of which the section of Figure 4 shows a single sheet-metal part 1, are contained in the concrete ceiling 13. The fully threaded screw 14 is merely indicated. A screw channel 15 is formed above the sheet-metal part 1, which is surrounded on all sides by concrete, as an extension of the screw, at the locations at which the pin 6 was previously arranged.

The section of Figure 5, from a direction offset by 90°, likewise shows how the sheet-metal parts 1 of the connection element are surrounded on all sides by concrete. The screw channels 15, through which access to the upper side of the screw head of the screws 14 is also possible, can also be seen here. It can be seen from the comparison of the sections of Figures 4 and 5 that the screws 14 run obliquely in two directions, that is to say obliquely in the plane of the longitudinal direction of the wooden beam 12 and obliquely in a plane perpendicular to said longitudinal direction.

Whereas, in the discussion of Figure 3, it is merely indicated that the connection element is arranged at a distance with respect to the lower side 10 of the concrete element 13 to be produced by the formwork, Figure 6 and Figure 7 show a possibility of how this maintaining of the distance can be achieved. For this purpose, use is made of a mountina 20 which is composed, for example, of plastic. 13

The mounting 20 contains a base part 21 in the form of a plate with a flat lower side. Said baseplate 21 is placed, for example, onto the formwork board and adhesively bonded there. The upper side of the formwork board forms the lower side 10 of the concrete part 13 to be produced. The baseplate 21 has two lateral, upwardly protruding wings 22, see the end view in Figure 7. Said two wings 22, which run flat and parallel to each other, each have at the same height on the mutually facing insides thereof a groove 23 running perpendicularly to the plane of the drawing in Figure 7. The width of the groove 23 corresponds to the thickness of the sheet-metal part 1 of the connecting element. The connecting element can therefore be pushed into said grooves 23, wherein, because of the described profile of the grooves 23 running perpendicularly to the plane of the paper, the part, which does not have a hole, of the sheet-metal element 1 runs parallel to the lower side of the plate element 21. A sleeve 24 is placed, for example is integrally formed, on the plate element 21. Said sleeve 24 has a continuous hole 25 which is intended for receiving the front end region of the section 7 of the pin 6. The hole 25 in the sleeve 24 runs coaxially with respect to the hole 4 in the sheet-metal part 1 of the connection element. The pin 6 can thereby be aligned both with respect to the sheet-metal element 1 and with respect to the lower side 10 of the concrete element 13 to be produced. The distance of the sheet-metal element 1 from the lower side 10 of the concrete element 13 and the angle of the axis of the hole 4 are selected in such a manner, and the pin 6 is designed in such a manner that whenever the pin 6 rests with the transition thereof between the two sections 7, 9 thereof on the contact surface of the sheet-metal element 1, the flat end surface 8 of said pin lies in the lower side 10 of the concrete part 13 at the same time.

The previously discussed embodiments of Figures 1 to 7 are designed in such a manner that the axis of the fastening element, preferably a screw, runs obliquely with respect to the lower side 10. However, it is also possible as the fastening element to use a screw or a pin which runs perpendicularly to the lower side 10. In this case, use can be made of a sheet-metal element 31 which has a central section 32 with the hole 4 which is arranged in the formwork in such a manner 14 that said section runs parallel to the lower side 10. In order to transmit the shearing forces, the sheet-metal element 31 then has one or two lateral wings 33 which preferably run perpendicularly to the central section 32. The arrangement can be made as shown in Figure 8, or the other way around, as illustrated in Figure 9.

In order to make a slightly oblique profile of a fastening element possible also in such an embodiment as shown in Figures 8 and 9, the sheet-metal element can also take on the shape in Figure 10, in which a central section 36 containing the hole 4 is arranged slightly obliquely with respect to the lower side 10, with the two wings 37 and 38 differing in length.

The mounting 20 illustrated in Figures 6 and 7 can be an individual element, and therefore a dedicated mounting is provided for each connection element. However, it is also conceivable for a continuous baseplate with a multiplicity of wings 22 arranged in pairs and sleeve 24 to be used.

It is likewise conceivable for a multiplicity of baseplates to be connected to one another by thin films.

In the embodiment illustrated in Figure 11, the connection element 41 is designed as an angular element with two limbs 42, 43 running approximately perpendicularly to each other. The angular element is oriented in such a manner that the ends of the two limbs 42, 43 rest on the formwork board, i.e. subsequently in the separating surface between the concrete 13 and the wooden support 12. The two limbs 42, 43 have such a length that the predetermined or designed angular orientation between the screw 14 and the separating surface is achieved or is made possible. The longer limb 42 can have an aperture, see Figure 13, which ensures that the concrete can also easily penetrate under the connection element.

In the arrangement of Figure 12, a spacer element 44 is first of all placed onto the formwork board, and then the connection element 41 is placed onto said 15 spacer element 44. The spacer element can be a very simple and inexpensive plastics element which either has a passage opening for the stem of the screw 14 or which is bored through when the screw is screwed in.

With regard now to the embodiment of Figure 15. The mounting 50 is formed here by a body which is composed of crumbling material or material easily destructible in another manner and which has a flat base surface 51 and a flat surface 52 running parallel to the latter. The distance between said two flat boundary surfaces 51, 52 corresponds to the thickness of the concrete layer to be produced. Recesses 55 into which concrete subsequently penetrates are formed in the obliquely running side surfaces 53, 54. The body has a slot 56 which runs obliquely with respect to the boundary surfaces 51,52 of the body and into which a disc element having a central hole is inserted. Below the slot 56 for the disc element, a channel 57 is formed in alignment with the central hole and reaches as far as the base surface 51 of the body of the mounting 50. When such a mounting 50 with the disc element is inserted into the formwork and the formwork is filled with concrete, the space occupied by the body remains free of concrete, as does the channel 57. After the curing, the surface 52 of the mounting 50 is visible in the upper side of the concrete element. A screw can be pushed in, the screw penetrating the body and, in the process, forming the screw channel in the body of the mounting 50 itself.

In a direction perpendicular to the plane of the drawing, the mounting 50 is significantly narrower than the corresponding extent of the disc element, and therefore the disc element, upon being stressed by a screw guided through the hole therein, rests with its lower side on the concrete and only a small part of said disc element rests on the mounting.

Figure 16 shows a further mounting 60 which contains a foot element 61 with a connecting piece 62, 63. The upper connecting piece 63 has a larger diameter than the lower connecting piece 62. The two connecting pieces 62, 63 are connected to each other by a bushing 64. The upper end of the connecting piece 63 is closed with the aid of a thin Dlate 65. The connection element of Fiau- 16 res 16 and 17 likewise includes a disc element 66 which, instead of a central hole, has a recess 67 which is open on one side. The disc element 66 is pushed into the bushing 64 from below until it is in the position illustrated in Figure 17. The transverse extent of the recess 67 corresponds to the diameter of the lower connecting piece 62 which, for its part, approximately corresponds to the stem diameter of a screw. This means that the lower side of the screw head rests on the edge of the disc element 66.

Figures 18-20 below show a mounting 70 which is constructed in a similar manner to the mounting 60 of Figures 16 and 17. In the example illustrated, the mounting is composed of plastic and is of multi-part design. The mounting 70 contains a footplate 71 which, in the example illustrated, is of round design. From the footplate, the lower tubular section 72 extends obliquely upwards, at an angle which is, for example, 30°. The upper end of the lower tubular section 72 ends in a plate 73 projecting in relation to the outside diameter of the tubular section 72. Said plate 73 merges into the footplate 71, for which purpose the footplate 71 has an extension 74. Said extension can be seen in Figures 18 and 19. A web 75 which runs perpendicularly to the footplate and forms a reinforcement is formed between the tubular section 72 and the extension 74 of the footplate 71. The section of Figure 20 passes precisely through said web 75. In the example illustrated, four latching pins 76 protrude upwards from the upper side, which faces away from the footplate 71, of the plate 73, which is integrally formed at the end of the lower tubular section 72. Said latching pins 76 contain a head provided with two outer latching lugs, and a slot running in the longitudinal direction. The latching lugs are integrally formed outside the central opening in the plate 73, said opening being arranged as an extension of the lower tubular section 72.

An enlarged intermediate plate 77 which has passage openings at the locations where the latching pins 76 are arranged is placed onto the plate 73. The intermediate plate 77 here forms the disc element. The intermediate plate 77 like- 17 wise contains a central passage opening for the head of the fastening screw. The intermediate plate 77 increases the contact surface for the fastening screw. Said intermediate plate is produced from thicker material and can optionally also be composed of a different material. A further tubular section 78 which has a footplate 79 is then placed onto the upper side of said intermediate plate 77. Openings through which the latching pins 76 reach are formed in the footplate 79. The heads of the latching pins 76 can still just be seen in Figure 18. The latching pins 76 therefore serve to secure the upper tubular section 78 on the lower tubular section 72. The upper tubular section 78 can be composed of thinner material. The task of the tubular section 78 is to keep a screw channel free. In a similar manner as in the embodiment of Figures 16 and 17, the upper tubular section 78 is closed by a cover 79 which can easily be separated by a corresponding configuration. Figure 20 shows the interaction of such a mounting 70 with the fastening screw. The embodiment of the mounting that is illustrated in Figures 18-20 makes it possible to adapt the mounting to different thicknesses of the concrete slab to be produced by means of interchanging the upper tubular section 78.

Markings in the form of ribs 80 which make it easier to align the mounting 70 in the formwork before the concrete is cast in are formed on the upper side of the footplate 71. In the example illustrated, the ribs 80 run as an extension of the projection of the longitudinal direction of the screw channel or transversely with respect thereto. Other directions are likewise possible.

In order to produce a wood concrete composite, it is proposed to place one or more connection elements which each have a disc element with a recess into the formwork for producing the concrete part. The surroundings of said recess form a contact surface for the lower side of a screw head. The connection element contains a device in order to prevent concrete from penetrating a screw channel which can optionally be opened later. Concrete is subsequently cast into the formwork, and, after the concrete has set, a screw is inserted through the screw channel, said screw, because of the arrangement of the screw channel, being conducted through the recess of the disc element of the connection ele- 18 ment and being screwed into the wooden construction arranged under the concrete part.

Claims

1919

1. Forbindelsesorgan til en træforbindelse, og som omfatter 1.1 et i det mindste tilnærmelsesvis plant pladeorgan (1), som består af metal og/eller plast, og 1.2 som har en udtagning (67), der især er udformet som et hul (4), 1.3 hvis omgivelser danner en anlægsflade for undersiden af et hoved på et stiftformet fastgørelsesorgan (14), 1.4 et holdeorgan (20) til fastholdelse af pladeorganet (1), og som også omfatter 1.5 et kanal-dannende organ til dannelse af en gennem udtagningen (67), henholdsvis pladeorganets (1,66) hul (4), gående skruekanal, og hvor 1.6 det kanal-dannende organ i det mindste delvis er en del af holdeorganet (20), og holdeorganet - i det mindste i det område, hvor den kanal, som skal tildannes, befinder sig - består af et ved indtrykning af en skrue, let ødelæggeligt materiale, og/eller 1.7 at det kanal-dannende organ over og/eller under pladeorganet (64, 77) er dannet ved hjælp af et rørafsnit (62, 63; 72, 78), og at eventuelt røraf-snittene (62, 63; 72, 78) på begge sider af pladeorganet (64, 77) kan forbindes med hinanden og/eller med pladeorganet (64, 77).A connecting member for a wooden connection, comprising: 1.1 a at least approximately flat sheet member (1) consisting of metal and / or plastic, and 1.2 having a recess (67) formed in particular as a hole (4). 1.3, the surroundings of which form a abutment surface for the underside of a head of a pin-shaped fastener (14), 1.4 a holding means (20) for retaining the plate means (1), and which also comprises 1.5 a duct-forming means for forming a passage the recess (67), hole screw (4) of the plate means (1.66), respectively, and wherein 1.6 the channel-forming member is at least partly part of the holding means (20) and the holding means - at least in that area wherein the duct to be formed is comprised of a slightly degradable material, by pressing a screw, and / or 1.7 that the duct-forming member above and / or below the plate member (64, 77) is formed by of a pipe section (62, 63; 72, 78) and, optionally, the pipe sections (62, 63 72, 78) on both sides of the plate member (64, 77) may be connected to each other and / or to the plate member (64, 77).

2. Forbindelsesorgan ifølge krav 1, hvor det kanal-dannende organ har et i hullet (4) på pladeorganet (1) separat, løsbart indsætteligt konstruktionselement, som især er udformet som en tap (6), der har et første cylindrisk afsnit (9) med en diameter, som er større end svarende til hullet (4), og et andet afsnit (7) med en diameter, som er mindre end svarende til hullet (4).A connector according to claim 1, wherein the duct-forming member has a separate, releasably insertable structural member, which is formed in the hole (4) on the plate member (1), which is in particular formed as a pin (6) having a first cylindrical section (9). ) having a diameter greater than corresponding to the hole (4), and another section (7) having a diameter less than corresponding to the hole (4).

3. Forbindelsesorgan ifølge et af de foregående krav, hvor pladeorganet er udformet som et metalpladeorgan (1), der er opbygget af to i det mindste tilnærmelsesvis plane dele, som er således anbragt i forhold til hinanden, at de danner en vinkel i intervallet ca. 0° til ca. 90°, og hvor hullet (4) er anbragt i én af de to dele. 20A connector according to any one of the preceding claims, wherein the plate member is formed as a metal plate member (1), which is made up of two at least approximately flat parts, which are arranged so that they form an angle in the range of about . 0 ° to approx. 90 and the hole (4) is arranged in one of the two parts. 20

4. Træbeton-komposit med 4.1 et betonelement (13), 4.2 hvori mindst et forbindelsesorgan ifølge et af de foregående krav er indrettet, samt med 4.3 mindst en trækonstruktion (12), som 4.4 langs en forbindelsesflade ligger plant an mod undersiden af betonelementet (13), og 4.5 er forbundet, især sammenskruet, med et betonelement (13) ved hjælp af et gennem et hul (4) i forbindelsesorganet stukket fastgørelsesorgan (14).Wooden concrete composite with 4.1 a concrete element (13), 4.2 in which at least one connecting member according to one of the preceding claims is arranged, and with 4.3 at least one wooden structure (12), which 4.4 along a connecting surface lies flat against the underside of the concrete element ( 13) and 4.5 are connected, especially screwed together, to a concrete element (13) by means of a fastening means (14) inserted through a hole (4) in the connecting member.

5. Træbeton-komposit ifølge krav 4, hvor fastgørelsesorganet (14) er anbragt skråt eller vinkelret på forbindelsesfladen mellem betonelementet (13) og trækonstruktionen (12).Wooden concrete composite according to claim 4, wherein the fastening means (14) is disposed obliquely or perpendicularly to the connecting surface between the concrete element (13) and the wooden structure (12).

6. Træbeton-komposit ifølge krav 4 eller 5, hvor et med hul (4) forsynet pladeorgan (1) har afstand fra forbindelsesfladen mellem betonelementet (13) og trækonstruktionen (12).Wooden concrete composite according to claim 4 or 5, wherein a plate member (1) provided with a hole (4) has a distance from the connecting surface between the concrete element (13) and the wooden structure (12).

7. Træbeton-komposit ifølge krav 4 eller 5, hvor det med hul (4) forsynede pladeorgan (1) består af ikke-korroderende materiale og har sin inderside indrettet i forbindelsesfladen mellem betonelementet (13) og trækonstruktionen (12).Wooden concrete composite according to claim 4 or 5, wherein the plate member (1) provided with hole (4) consists of non-corrosive material and has its interior arranged in the interface between the concrete element (13) and the wooden structure (12).

8. Fremgangsmåde til fremstilling af en træbeton-komposit, og som har følgende fremgangsmådetrin: 8.1 mindst et pladeorgan (1) hørende til et forbindelsesorgan ifølge et af kravene 1 til 3 - indføres i en forskalling til fremstilling af et betonelement (13), 8.2 beton udstøbes i forskallingen, og 21 8.3 efter at betonen er afbundet, det fremstillede betonelement (13) så lægges på en trækonstruktion (12), og 8.4 der frembringes en skruekanal, som leder gennem et hul (4) i pladeorganet (1), og 8.5 et fastgørelsesorgan (14), som er udformet som en skrue, indsættes i skruekanalen og gennem hullet (4), og 8.6 fastgørelsesorganet indskrues i trækonstruktionen (12), ind til 8.7 skruen har fået undersiden af sit skruehoved bragt til anlæg mod hullets (4) omgivelser.A process for producing a concrete concrete composite having the following process steps: 8.1 at least one sheet member (1) of a connecting member according to one of claims 1 to 3 - is introduced into a formwork for producing a concrete member (13), 8.2 concrete is poured into the formwork and 21 8.3 after the concrete has been set off, the concrete element (13) made is then applied to a wooden structure (12) and 8.4 is provided with a screw channel leading through a hole (4) in the plate member (1), and 8.5 a fastener (14) formed as a screw is inserted into the screw channel and through the hole (4), and 8.6 the fastener is screwed into the wooden structure (12) until the screw has the underside of its screw head brought into contact with the hole. (4) surroundings.

9. Fremgangsmåde ifølge krav 8, hvor betonelementet (13) fremstilles fabriksmæssigt, medens forbindelsen til trækonstruktionen (12) etableres på byggestedet.A method according to claim 8, wherein the concrete element (13) is manufactured in the factory, while the connection to the wooden structure (12) is established at the construction site.

10. Fremgangsmåde ifølge krav 8 eller 9, hvor pladeorganet (1) anbringes således i forskallingen, at hullets (4) akse - og dermed en ved hjælp af en tap (6) dannet kanal (15) - forløber skråt i forhold til et forbindelsesplan mellem betonelementet (13) og trækonstruktionen (12).A method according to claim 8 or 9, wherein the plate member (1) is arranged in the formwork so that the axis of the hole (4) - and thus a channel (15) formed by means of a pin (6) - extends obliquely with respect to a connecting plane between the concrete element (13) and the wooden structure (12).

11. Fremgangsmåde ifølge et af kravene 8 til 10, hvor der i forskallingen til fremstilling af betonelementet (13) indføres mindst en holder for forbindelsesorganet, eventuelt sammen med forbindelsesorganet.A method according to any one of claims 8 to 10, wherein at least one holder for the connecting member, optionally together with the connecting member, is inserted in the formwork for the manufacture of the concrete element (13).

12. Fremgangsmåde ifølge et af kravene 8 til 11, hvor et forbindelsesorgan ifølge krav 1 anvendes, og hvor skruekanalen åbnes ved, at man ødelægger holderen ved hjælp af fastgørelsesorganet.A method according to any one of claims 8 to 11, wherein a connector according to claim 1 is used and the screw channel is opened by damaging the holder by means of the fastener.

13. Fremgangsmåde ifølge et af kravene 8 til 11, hvor et forbindelsesorgan ifølge krav 2 anvendes, og skruekanalen åbnes ved, at man udtager den delte konstruktionsdel.The method of any one of claims 8 to 11, wherein a connector according to claim 2 is used and the screw channel is opened by removing the split structural member.