Patent Application
20180171643
The invention relates to a fitting for connecting panels, boards or planks, collectively referred to as boards in the following text, having a supporting body, in particular in the field of decking or other outdoor areas.
Boards are generally screwed to a supporting structure in a manner arranged parallel to one another via a fitting attached to the board. This supporting structure can comprise spaced-apart beams or be a uniform surface, for example a surface consisting of OSB panels, concrete or other materials, to which the boards are attached. In this case, the boards subsequently to be laid are oriented with respect to the already laid boards in terms of parallelism and spacing, wherein joints form between the boards. Depending on the material and prevailing environmental conditions, the dimensions of the boards change, i.e. the size of the joint changes over time. In order to obtain a uniform joint pattern, it is known to provide fittings with spacers which project into the joint between adjacent boards, come into contact with the latter and remain in the joint.
Such a fitting is known from EP 2 527 550 A2. Said document discloses a fitting for connecting planks to a substructure, wherein each fitting projects under two planks and is connected to the two planks with at least one screw in each case, wherein the fitting rests on the substructure and is connected thereto by a screw, wherein the fitting comprises a material tongue with a particular thickness which is firmly connected to the fitting.
DE 20 2009 002 967 U1 discloses a fitting for planks, said fitting having a passage opening for a fastening bolt, wherein the fitting comprises an elastic guide insert as spacer. The guide insert is a claw connected firmly to the fitting, said claw engaging in lateral recesses in the planks and projecting laterally beyond the latter.
A drawback of this prior art is that these spacers bear firmly against adjacent boards and thus at least locally prevent the dimensions of the completely fitted boards from changing, this then possibly resulting in deformation of the supporting structure and/or deformation of the floor surface, this resulting in fundamentally dangerous tripping hazards. A further drawback is that these spacers define a particular joint width, although it may be appropriate, depending on the board material to be laid, to configure the joint widths to be selectable.
Therefore, the invention is based on the object of specifying a fitting that is usable in a more versatile manner and avoids the drawbacks of the prior art.
This object is achieved, in the case of a fitting having a main body and a spacer, wherein the main body has at least two fastening devices, wherein the spacer and main body are arranged predominantly at right angles to one another in the operating state, in that the main body and spacer are connectable together in a releasable manner by means of a third fastening device.
The fitting according to the invention has at least two fastening devices which serve for the one part for fastening to a board and for the other part for fastening the fitting to a substructure. These two fastening devices may be of identical or different types, and may also be fastening means themselves, but fastening devices of a passive type, in particular through-openings, are preferred. The first fastening device is arranged on the fitting such that, in use, it is arranged in the region covered by a board, and the second is arranged such that it is not covered. The main body can in this case have any desired circumferential shape, as long as it has a portion which is arranged under a board in use and has two portions which are not arranged under the board. In particular, the main body can be triangular, rectangular, square, oval, round, polygonal or the like, rectangular shapes being preferred. The spacer is arranged predominantly at right angles to the main body in the operating state of the fitting, with the result that it allows the board to rest optimally on its surface. The expression “predominantly at right angles” is understood here to include angles in the range from 90°±2.5°. The invention thus proposes, with a great advantage, designing the main body and spacer to be connectable together in a releasable manner by means of a third connecting device. This has the great advantage that the spacer is removable from the joint after the board has been laid, such that it does not hinder the dimensional change thereof and at the same time realizes a cleanly worked joint. At the same time, this has the advantage that fundamentally differently shaped, in particular thick, spacers can be provided and can be connectable to a main body, such that one type of main body is sufficient to realize different joint widths.
The development of the invention according to which the third fastening device is in the form of a plug-in slot is particularly advantageous. A plug-in slot, that is to say a male/female configuration of the third connecting device, simplifies and accelerates the connecting of the two components of the fitting, wherein especially the removal of the spacer from a joint is easy, it being sufficient just to pull on the spacer. More complicated manners of fastening are advantageously avoided. According to the invention, each of the two components can in this case be configured in either a male or a female manner, wherein the other is then formed in each case in the opposite manner. In particular, the fitting can have a peg over which a bore of the spacer engages, or the fitting can have a receiving opening, such as a blind hole, in which a correspondingly shaped part of the spacer engages. The latter is preferred, since in this way the main body can be configured as an extruded or injection-moulded part which has only smooth surfaces without projecting parts, thereby additionally also reducing the risk of injury to a user.
In a development of the invention, the third fastening device is in the form of a through-opening in the main body and in the form of a correspondingly shaped plug-in end in the spacer. Thus, the entire thickness of the main body is available for guiding the spacer, which is firmly anchored in a corresponding manner and is not tilted, or tilted only a little, out of the perpendicular position by the force exerted thereon by the pressure of a board.
If the main body has two longer sides and two shorter sides and has two ends, wherein the second and third fastening devices are each arranged in the region of one end, and wherein the first fastening device is arranged between the second and third fastening devices, this, with great advantage, allows the main body to be of narrow construction and also to project with its two ends under the board in use, in order both to keep the second and the third fastening device accessible and to allow connection to an already laid board, in particular by pushing under the latter. It is therefore in the form of a rectangle.
Furthermore, the invention proposes that the through-opening have an H-shaped cross-sectional area, wherein a connecting portion of the H shape extends parallel to the shorter side and orthogonally to the longer side of the main body. Generally, the through-opening can be formed with any cross-sectional shape, in particular a rectangular or a square or a round one. It can thus be selected irrespective of the cross-sectional shape of the spacer which is provided in the axial region thereof that serves for bearing on a board. A rectangular shape, or an H shape, is particularly preferred, however, since this allows a secure hold and the spacer can be formed with a cross-sectional area that is uniform and constant along its axial course, resulting in a spacer that is held in a structurally particularly simple manner. The spacer can thus be anchored particularly well with the two ends of the through-opening, which are thickened compared with the connecting portion.
In one configuration of the invention, the connecting portion has at least one, preferably several, in particular three protrusions projecting into it. The protrusions can in turn have any desired cross-sectional area in this case, as long as they constrict the free diameter of the connecting portion, with the result that they represent an obstacle for the plugging of the spacer into the through-opening in the third fastening device that is easy to overcome by light force exertion. As a result, additional stability of the spacer in the plug-in slot of the main body of the fitting is ensured by a force fit and slipping of the spacer through the through-opening is limited even in the event of a lack of constriction of the opening or a lack of widening of the spacer. From a production point of view, simple punching of the through-opening and of the spacer is thus allowed. A relatively large number is in this case considered to be advantageous for the number of protrusions in the connecting region of the H-shaped through-opening, since a relatively small number of protrusions can result in twisting or tilting of the spacer in the through-opening. An excessively large number of protrusions, by contrast, requires a relatively large force to be exerted for the plugging in and the releasing of the spacer from the plug-in slot. Although this results in particularly high stability of the connection of the main body and spacer, it counteracts the basic idea of the plug-in system being easy to release. Therefore, three protrusions in particular are considered to be advantageous according to the invention.
In one configuration of the invention, the spacer is formed in an H-shaped or rectangular manner in cross section. It thus has the same dimensions as, or smaller dimensions than, the through-opening, thereby allowing different spacer shapes and thicknesses. If it is formed in a rectangular manner, it engages in particular with the protrusions and bends the latter out of the plane of the main body, wherein a minimum thickness of the spacer is defined such that it is still just in contact with the free ends of protrusions that are located opposite one another in the through-opening. If it is formed in an H-shaped manner with pronounced or not very pronounced crossbars, the latter fit into the through-opening in a form-fitting manner to a greater or lesser degree even in the thickened end regions thereof.
If the spacer has different thicknesses, in particular 1.2 mm; 2 mm and 4 mm, ideal joint widths can be realized for the boards, depending on the material or thickness thereof, in order to allow the boards to expand.
Furthermore, the invention advantageously proposes that the main body have at least one groove extending orthogonally to the longer side. Ideally, the main body, which is wider than the board width, has two grooves, wherein the grooves are arranged on the fitting such that they are a board's width away from one another. The technical benefit of the grooves resides in marking that region which is located under the board in use. This ensures that the second and third connecting devices are freely accessible and not blocked. This also ensures that the spacer bears against the board, in particular flat against the board. If a board has to be attached in the vicinity of an obstacle such as a pillar or a wall, it is possible for those parts of the fitting that project under the board and serve to fasten it to the supporting surface to prevent clean insertion of the board at said point. The grooves allow clean removal of the disruptive part here, too, with the orientation being maintained by way of the grooves.
The invention proposes in particular that the main body have two grooves, which extend between the first and the third, and the first and the second fastening device. The result implemented thereby is that the first fastening device is arranged in a region of the main body which bears against the underside of the board. The other two fastening devices are located in a corresponding manner on the regions of the main body that protrude under the board, with the result that the spacer in the third fastening device is located in a joint after the board has been joined to the already laid boards, and it is possible to simply fasten the fitting to the supporting body by way of the second fastening device.
For optimal application of the invention, a method for fastening boards to a supporting body at right angles thereto using a fitting is proposed, having the steps of:
First of all, the spacer is fastened to the main body by the third fastening device. If the fitting consisting of the main body and spacer is arranged under the board for fastening, the fitting can be shifted such that the spacer bears against the board. If desired, the two steps can be interchanged such that the main body is first of all fastened to the board by orientation with the aid of the grooves in the board and subsequently the spacer is inserted. As a result of the arrangement of the grooves in the main body, the third fastening device is visible on the board side such that the spacer can be plugged in without problems and bears against the board. It is likewise possible for the two abovementioned steps to optionally be carried out first of all for all the boards to be laid before they are laid and attached to the supporting body. This more extensive preparation does not have any effect on the overall sequence of the method and can thus be carried out as per the preference of a user. Subsequently, provision is made for the assembled board and fitting to be oriented with the boards already attached to the support body and pushed against said boards such that the boards are at the same vertical height and the fittings of the boards to be attached to the supporting body are pushed under the already attached boards until the spacer bears against the already attached board and thus determines the joint width. Ideally, the end with the third fastening device is thus already located partially under the board already fastened to the supporting body. After the board has been oriented, the second fastening device is used to fasten the fitting to the supporting body. Provision is also made for the next board to be laid to be prepared for laying by the attachment of a fitting, unless this has already taken place beforehand. This board, too, is joined in an oriented manner to the previously laid board such that the spacer again determines the joint between these boards. Provision is made for these steps to be repeated as many times as necessary until all the boards have been laid and fastened to the supporting body. Once this has occurred, according to the invention, all the spacers are removed from the joints.
The invention proposes that the spacers of a fitting that has just been laid be removed and/or that steps a) and b) be interchanged. This has the advantage that it is easily possible to move on the partially laid board floor without spacers protruding depending on length.
The invention is described by way of example in the preferred embodiment with reference to the following figures.
In a similar manner to the second fastening device 4 in
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2016 124 988.2 | Dec 2016 | DE | national |
