EP3569807A1 - Joint covering profile - Google Patents

Abstract

The invention relates to a joint strip for a joint, which is formed between a component, in particular a window or door frame, and an adjacent plaster, with a contact section for attaching the joint strip to a component, a plaster receiving section for connecting to the plaster and a compensation section for Compensating for changes in size of the joint, wherein the compensation section comprises a bellows which has two folded side walls. According to the invention it is provided that at least one folded side wall has at least one fold edge which is arcuate.

Description

The invention relates to a joint strip for a joint, which is formed between a component, in particular a window or door frame, and an adjacent plaster, with a contact portion for attaching the joint strip to the device, a plaster receiving portion for connecting to the plaster and a compensation section for Compensating changes in size of the joint, wherein the compensation portion comprises a bellows having two folded side walls, according to the preamble of claim 1.

A generic grooved bar goes out of the EP 1 627 982 B1 out. Such joint strip with bellows can compensate for dimensional variations of a gap to be covered between a component and an adjacent plaster particularly well. Such size changes may occur, for example, following plastering due to shrinkage of the plaster when setting or in the mounted state due to weather-related temperature fluctuations in the interior or exterior of a building.

In the DE 196 14 109 C1 is described a soffit connection profile for window and door openings. The profile has a plaster receiving part and a movement receiving part with arcuate webs of elastically bendable material.

The AT 00 68 19 U1 teaches a soffit profile having an outer leg and a sealing leg which are interconnected by a single flexible strap.

The invention has for its object to provide a joint strip with which in a further simple and compact design and relatively large dimensional variations of a gap to be covered can be compensated.

The object is achieved according to the invention by a joint strip with the features of claim 1. Preferred embodiments of the invention are indicated in the dependent claims.

The joint strip according to the invention is characterized in that at least one folded side wall has at least one fold edge, which are arc-shaped.

A basic idea of the invention is to depart from the hitherto accordion-like bellows with line-shaped fold edges and instead to provide arcuate or curved fold edges. In contrast to the line-shaped fold edges, which are formed by acute-angle converging fold walls, arcuate fold edges offer the possibility of pulling them apart with less stress on the folds into a greater length. As a result, a greater difference between a minimum height of the bellows, in a compressed state and a maximum height in an exploded state is achieved in a further compact space of the bellows. Thus, the joint strip according to the invention can compensate for such a bellows larger dimensional variations in a gap to be covered.

A preferred embodiment of the joint strip according to the invention is that the fold edges are formed as approximately semicircular arcs. Such semicircular arches can be pulled almost stretched without too much material load of the plastic material in the edge or bow area. This provides a high fatigue strength with a dynamic loading of the bellows for a long time. With regard to the design of the arch form at the fold edges, it is particularly preferred according to a development of the invention that the arcuate fold edges have an inner radius between 0.1 mm to 2 mm and an outer radius of 0.5 mm to 6 mm. The wall thickness of the folded side walls can be between about 0.3 mm to a few millimeters.

A particularly good compensation with a simultaneously very good insulating property for closing the covered joint is achieved according to a variant of the invention in that the bellows is formed by two opposite folded side walls which enclose an inner chamber cavity. The bellows with the two spaced apart sidewalls may have a width in a compressed state or in an exploded state that does not exceed a width of the adjacent abutting portion or adjoining plaster receiving portion.

A further improvement of the compensation capability is achieved according to a further embodiment of the grooved strip according to the invention in that at least one folded side wall has at least one transition section, with which the side wall is attached to the plaster section or the contact section, and that the transition section is arcuate, in particular approximately quarter arc , In particular, each folded side wall at the two transitional sections merges with the plaster receiving section or with the contact section with such an arcuate shape.

Furthermore, according to an embodiment variant of the invention, it is preferable for the transition section to strike a web surface of the plaster section or the abutment section substantially at right angles, wherein the web surface is essentially parallel to the component. Thus, a particularly good longitudinal extension of the bellows in the exploded state can be achieved transversely to the longitudinal axis of the component and the receiving portion or the contact portion.

Furthermore, a particularly compact design can be achieved according to a development of the invention in that the at least one folded side wall in a folded state inner fold edges and outer fold edges which are spaced apart, and that in the folded state of at least one transition section between the inner Pleated edges and the outer fold edges lies. This means that the transition sections are offset from the inner and outer fold edges. Thus, in a compressed state, the transition sections are not immediately above or below the inner fold edges and the outer fold edges. As a result, in a compressed state of the bellows a lower maximum height of the grooved bar can be achieved.

A further improvement can be achieved according to an embodiment variant of the invention in that the at least one folded side wall has a plastic material which is softer than a plastic material of the plaster receiving section or of the contact section. Preferably, the folded side wall may be formed of a soft PVC, while the plaster receiving portion or the abutment portion are formed of a hard PVC. Other suitable types of plastics, such as PA, PE or PU, etc. may also be used.

A further preferred embodiment of the invention consists in that an adhesive strip, in particular with a foam material, is provided for attachment to the component at the abutment portion. The adhesive strip can be provided in particular with a foamed sealing material, preferably a PE foam. The adhesive strip may be formed as a band material, which is attached to the contact portion of the joint strip. In this case, an adhesive surface is provided for attachment to the device, wherein the adhesive surface may be protected by a cover. This can be removed from the tape immediately before applying and sticking.

For a good connection of the plaster receiving part with the adjacent plaster, it is preferred according to a further embodiment, that on the plaster receiving part a fabric, a scrim, a net, a knit or the like is provided for connection to the plaster.

Furthermore, it may be advantageous that at least one trigger edge is formed on the plaster receiving part. Preferably, two or more trigger edges can be provided for a trigger tool. With the trigger tool can be deducted along the trigger edge of the applied plaster to form a uniform plaster surface.

To protect the bellows and the component during plastering, it is advantageous according to a further embodiment of the joint strip according to the invention that a releasable fastening web for a cover film is arranged on the plaster receiving part.

The attachment web can also be referred to as a protective tab, which can be separated and released after completion of the cleaning work from the plaster receiving section.

Fig. 1

eine Querschnittsansicht durch eine erste erfindungsgemäße Fugenleiste;

Fig. 2

eine Querschnittsansicht durch eine zweite erfindungsgemäße Fugenleiste in einem Normalzustand;

Fig. 3

eine Querschnittsansicht der Fugenleiste von Fig. 2 in einem zusammengedrückten Zustand;

Fig. 4

eine Querschnittsansicht der Fugenleiste von Fig. 2 und Fig. 3 in einem auseinandergezogenen Zustand;

Fig. 5

eine Querschnittsansicht der Fugenleiste von Figuren 2 bis 4 in einem ausgezogenen und nach links versetzten Zustand;

Fig. 6

eine Querschnittsansicht der Fugenleiste von Figuren 2 bis 5 in einem ausgezogenen und nach rechts verschobenen Zustand; und

Fig. 7

eine Querschnittsansicht einer dritten erfindungsgemäßen Fugenleiste.

The invention will be further described by means of preferred embodiments, which are shown schematically in the drawings. In the drawings show:

Fig. 1

a cross-sectional view through a first joint bar according to the invention;

Fig. 2

a cross-sectional view through a second joint bar according to the invention in a normal state;

Fig. 3

a cross-sectional view of the grout of Fig. 2 in a compressed state;

Fig. 4

a cross-sectional view of the grout of Fig. 2 and Fig. 3 in an exploded state;

Fig. 5

a cross-sectional view of the grout of FIGS. 2 to 4 in an extended and leftward state;

Fig. 6

a cross-sectional view of the grout of FIGS. 2 to 5 in an extended and shifted to the right state; and

Fig. 7

a cross-sectional view of a third joint strip according to the invention.

A first inventive grooved strip 10 after Fig. 1 has an abutment portion 20, on the underside of an adhesive strip 24 with a foamed material for adhering the groin strip 10 to a component, such as a window or door frame or an insulating board, is arranged. On a top side of the plate-shaped abutment section 20, a first web surface 22 is arranged, on which two folded side walls 44 are mounted for forming a bellows 42 of a compensation section 40.

In the illustrated embodiment of the profile-like joint strip 10, the folded side walls 44 have a simple shape, each with a simple fold edge 46th which is arc-shaped. The folded side walls 44 enclose an inner chamber cavity 45, which is closed at its upper side by a plate-shaped strip 31 of a plaster receiving portion 30. For this purpose, the side walls 44 are each attached at its lower and upper portion with a quarter-circle-shaped transition portion 48 with the first web surface 22 of the lower contact portion 20 and an upper second web surface 32 to an underside of the plate-shaped bar 31 of the plaster receiving portion 30.

The plaster receiving portion 30 has on an upper side of the plate-shaped strip 31 two vertical webs 33, between which by means of a strip-shaped fastening element 38, a fabric 34 is arranged for better connection of the plaster. The fastener 38 is in the illustrated embodiment according to Fig. 1 in a particularly preferred manner frictionally and positively fastened by corresponding protruding lugs on the vertical webs 33 on the plaster receiving portion 30. The fastening element 38 may be extruded or preferably clipped on.

At a front side of the plaster receiving portion 30, a step-shaped shoulder for forming a first withdrawal edge 35 and a second withdrawal edge 36 is formed, which are formed for removing an applied plaster. At the top of the corresponding area of the plaster receiving portion 30 projections and recesses may be formed to allow a good connection with the adjacent plaster.

Preferably, the grooved bar 10 may be integrally formed with the abutment portion 20, the plaster receiving portion 30 and the compensation portion 40 in a coextrusion process. Preferably, the compensation portion 40 is formed with the folded side walls 44 of a different, preferably softer base material than the contact portion 20 and the plaster receiving portion 30th

The invention will be further described with reference to FIGS FIGS. 2 to 6 explained with reference to a second embodiment of a grooved strip 10 according to the invention. The joint strip 10 according to Fig. 2 is basically like the first grooved bar 10 according to Fig. 1 so that the basic structure of the above statements is referenced. In contrast to the first joint strip 10 according to Fig. 1 is on the front of the plaster receiving portion 30 via a thin point 52 a fastening web 50, also called protective tab, releasably attached. On an upper side of the fastening web 50, an adhesive surface 54 is provided, with which a protective film for protecting the joint strip and the component during plastering can be attached. After the plastering work, the protective film can be achieved with the fastening web 50 at the thin point 52.

Furthermore, in order to clarify the mode of operation of the compensating section 40 designed according to the invention, it follows the grooved strip 10 according to the invention in the second embodiment Fig. 2 the compensation section 40 is formed with multiply folded sidewalls 44. In this case, each folded side wall 44 has two inwardly directed inner fold edges 46a and an outwardly directed outer fold edge 46b. In this normal state, the arcuate portions of the fold edge 46 are arranged such that the transition portions 48, with which the side wall 44 are respectively connected to the abutment portion 20 and the plaster receiving portion 30, are respectively disposed between the inner fold edges 46a and the outer fold edge 46b. Fig. 2 shows the grouser bar 10 in a relaxed, unloaded normal condition. According to Fig. 3 the grout 10 is shown in a maximum compressed state, wherein the abutment portion 20 and the plaster receiving portion 30 have a minimum distance d to each other. In this compressed state, the advantageous nature of the offset folding is exhibited, with the inner arcuate fold edges 46a and the arcuate outer fold edges 46b being disposed relative to one another such that the transition sections 48 are offset from the fold edges 46a and 46b. This allows a stronger compression of the compensation section 40.

Fig. 4 shows the grouser bar 10 according to the Figures 2 and 3 in a maximally pulled-apart state, wherein the contact portion 20 to the plaster receiving portion 30 has a maximum distance D. In particular Fig. 4 It can be seen that due to the arcuate embodiments of the inner fold edges 46a and the outer fold edge 46b and the quarter arc-shaped configuration of the transition section 48, the folded wall 44 are almost completely stretched can. By this embodiment of the invention, the grouser bar 10 can compensate for particularly large dimensional variations of the joint to be covered, the maximum compensation capability is given by the difference of the maximum distance D to the minimum distance d.

From the FIGS. 5 and 6 It can be seen that due to the outstanding deployability of the bellows 42 of a grooved strip 10 according to the invention not only in the vertical direction with respect to a component surface is a large compensation capability, but also in a lateral displacement of the contact portion 20 to the plaster receiving portion 30 FIGS. 5 and 6 in each case an opposite offset with a maximum pulling apart of the compensation section 50. In each case, a maximum offset B1 in the one direction according to Fig. 5 and a maximum offset B2 in the opposite direction according to FIG Fig. 6 reached.

A third embodiment of a grooved strip 10 according to the invention is shown in FIG Fig. 7 shown, wherein the grouser bar 10 according to Fig. 7 from the grooved bar according to Fig. 2 solely by the number of fold edges 45 of the side walls 44 of the bellows of the compensation section 40 differs. In the third embodiment of the grooved bar 10 according to the invention, three inner fold edges 46a and two outer fold edges 46b are arranged on each folded side wall 44.

Claims (12)

Joint strip for a joint,
which is formed between a component, in particular a window or door frame, and an adjacent plaster, with a contact section (20) for attaching the joint strip (10) to the component, - A plaster receiving portion (30) for connecting to the plaster and a compensating section (40) for compensating changes in the size of the joint, the compensating section (40) comprising a bellows (42) having two folded side walls (44), characterized, - That at least one folded side wall (44) has at least one fold edge (46) which is arc-shaped. Grout bar according to claim 1,
characterized,
that the fold edges (46) are formed as approximately semicircular arcs. Joint molding according to claim 1 or 2,
characterized,
that the arcuate folding edge (46) has an inner radius between 0.3 mm to 2 mm and an outer radius of 1 mm to 6 mm. Joint molding according to one of claims 1 to 3,
characterized,
in that the bellows (42) is formed by two opposite folded side walls (44) which enclose an inner chamber cavity (45). Joint molding according to one of claims 1 to 4,
characterized,
that at least one folded side wall (44) has at least a transition section (48), with which the side wall (44) attached to the plaster-receiving portion (30) or the abutment portion (20), and
that the transition section (48) is arcuate, in particular approximately quarter-circular arc-shaped. Grout bar according to claim 5,
characterized,
in that the transition section (48) projects substantially perpendicularly onto a web surface (22, 32) of the plaster receiving section (30) or the abutment section (20), the web surface (22, 32) being substantially parallel to the component. Joint strip according to claim 5 or 6,
characterized,
the at least one folded side wall (44) inside in a folded state folding edges (46a) and outer fold edges has (46b) which are spaced from each other, and
that a transitional portion (48) is in the folded state of the at least between the inner fold edges (46a) and the outer fold edges (46b). Grout bar according to one of claims 1 to 7,
characterized,
in that the at least one folded side wall (44) comprises a plastic material which is softer than a plastic material of the plaster receiving portion (30) or the abutment portion (20). Joint molding according to one of claims 1 to 8,
characterized,
in that an adhesive strip (24), in particular with a foam material, is provided for attachment to the component at the abutment portion (20). Joint molding according to one of claims 1 to 9,
characterized,
in that a fabric (34), a scrim, a net, a knitted fabric or the like is provided on the plaster receiving section (30) for connection to the plaster. Grout bar according to one of claims 1 to 10,
characterized,
in that at least one withdrawal edge (35, 36) is formed on the plaster receiving section (30). Grout bar according to one of claims 1 to 11,
characterized,
that a releasable fastening web (50) is arranged on a cover on the plaster-receiving portion (30).

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