DK2942449T3

DK2942449T3 - Profile reinforcement molding tablecloth, especially awning

Info

Publication number: DK2942449T3
Application number: DK15159771.3T
Authority: DK
Inventors: Sven Kröner
Original assignee: Schmitz-Werke Gmbh + Co Kg
Priority date: 2014-04-15
Filing date: 2015-03-19
Publication date: 2017-01-30
Also published as: ES2602289T3; DE102014207162B3; PL2942449T3; EP2942449B1; EP2942449A1

Description

The invention relates to a profile keder fabric assembly, and in particular to an awning assembly with the features set out in the preamble to patent claim 1. A profile keder fabric assembly of this type in the form of an awning assembly is known from US 5 002 111 A and has a profile, in particular a drop-out profile of an awning assembly, comprising a keder channel and a fabric, in particular awning fabric having a keder hem to be fastened in the keder channel, a keder ) being located in the keder hem that leaves open the entry region thereof. A fabric anchoring plug is provided with a head and a shank and is inserted, with its shank, in the entry region of the keder hem. By means of a clamping screw passing through the head region of the shank transversally, the fabric anchoring plug is secured in the keder channel in such a way that the keder hem is locked.

In particular when the awning fabric is exposed to a high force, as caused by strong winds or water pockets for example, the extreme tensile force the awning fabric is exposed to may overcome the clamping force of the anchoring plug, causing the fabric to detach from the anchoring plug. This, in turn, would cause ) the fabric to gather in the keder channel in the drop-out profile, which greatly impairs the visual appearance and usability of the awning.

To improve the fastening of the keder hem, the fabric anchoring plug shown in the aforementioned document has a lump-shaped bead at its shank end used to i press the section of the keder hem acted upon thereby into the opening slot of the keder channel so as to increase the clamping force at this point. Due to the relatively short and smooth design of said known fabric anchoring plug, there should still be the need for an improved fabric anchoring plug in terms of the achievable retaining forces for the fabric. ) A somewhat different design is shown in EP 0 984 115 A2 according to which the keder extends along the entire length of the keder hem, and a clamp-like retaining device engages the keder together with the keder hem from below.

Said retaining device is secured in the keder channel by means of a clamping screw in a head of said retaining device. In this example, the problem might be that while the clamping screw is being tightened the retainer may deform up to the point where the greatest possible surface-to-surface contact with the keder and the keder hem is no longer guaranteed so that consequently, the reliability of said fastening method seems to be in need of improvement.

From DE 20 2000 012 799 U1, a locking device for securing a hem of an awning fabric in the form of an anchoring plug is known, a clamping screw for securing the anchoring plug in the keder channel of the awning drop-out profile being formed by a threaded pin with a hexagon socket.

The subsequently published document DE 10 2013 203 645 A1 shows an awning anchoring plug of this type the shaft of which is provided, in the region of its tip, with peripherally surrounding retaining ribs having a profile in the manner of sawing teeth.

Based on the prior art problems set out above, the invention is based on the object of improving a profile keder fabric assembly of the generic type in such a way as to achieve a significantly improved clamping force and reliable fixing of a fabric in the keder channel of a profile.

According to the characterizing part of claim 1, this object is resolved in that the shank of the non-distorted fabric anchoring pin is bent in the plane spanned by the anchoring pin longitudinal axis and the clamping screw longitudinal axis and straightens more and more when the clamping screw is tightened about the head inserted into the keder channel, the head serving as a rotary bearing, in such a way that a clamping force is applied to the keder hem.

As a result of this particular shaping, the shank of the fabric anchoring pin is “deformed” from its bent configuration into a straight elongated condition in such a way that the deformation force generated as a result of the inherent elasticity of the anchoring pin brings about an effective locking of the keder hem in the keder channel. At the same time, a defined contact region between the shank of the fabric anchoring pin and the keder channel, in particular the edges of the opening slot thereof, is formed when the shank is straightened, thus ensuring a reliable fixing at a high clamping force.

Preferred further developments of the profile keder fabric assembly are set out in the dependent claims. According thereto, the bending of the non-distorted fabric anchoring pin may be dimensioned such that the deflection of the shank tip with respect to the direction of the longitudinal axis at the shank root corresponds to between 5% and 20%, preferably between 8% and 15%, and particularly preferably approximately 10 % of the shank length.

Another approach for dimensioning the bending of the fabric anchoring pin in the non-distorted state is, for example, to design the deflection of the shank tip with respect to the direction of the longitudinal axis at the shank root in relation to the diameter of the shank in such a way that it ranges between 40% and 100%, preferably 50% and 80%, particularly preferably 60% of the diameter of the shank.

Both design criteria set out above for the bending of the non-distorted fabric anchoring pin are favourable compromises between the generation of a sufficiently high clamping force while ensuring that the straight elongated state of the fabric anchoring pin is achieved reliably.

To further improve the fastening of the fabric anchoring pin while in particular preventing the keder hem from being pulled away from the fabric anchoring pin, for instance under the influence of wind on the fabric, the anchoring pin shank is to be provided with peripherally surrounding retaining ribs having a profile in the manner of sawing teeth in the direction counter to the direction of extraction of the keder hem. These ensure that the fabric anchoring pin sort of claws into the keder hem of the fabric in particular in the non-distorted condition.

The straightening of the anchoring pin shank as provided according to the invention when the clamping screw is being tightened ensures that when the shank is straightened into its distorted final condition, the fabric hem is preferably clamped between the opposing edges of the opening slot of the keder channel and the shank of the fabric anchoring pin in a line contact across the entire shank length. As a result, an optimized fastening of the fabric in the keder channel is achieved which had not been achievable with the previous anchoring pin designs.

An improved fixation is also achieved even if the anchoring pin is not entirely moved into its straight elongated final condition for fixing the fabric. In this case, the shank applies a force on the fabric with point-shaped clamping zones near its head and its tip. This is in contrast to conventional anchoring pins that only apply a point load in front of the anchoring pin head in these cases so that only a relatively small amount of force and displacement of the fabric is required to disengage the anchoring pin.

To achieve an effective transmission of the tightening torque of the clamping screw to the anchoring pin shank so as to straighten the latter, the axis of rotation of the clamping screw may preferably form an obtuse angle with the anchoring pin longitudinal axis, said angle opening in the bending direction of the shank. In this case, it must be ensured as well that when the fabric anchoring pin is inserted into the keder hem, the head of the anchoring pin can be positioned in the keder channel in such a way that the clamping screw can be positioned substantially at right angles to the longitudinal axis of the keder channel so as to provide optimal access for an actuation tool.

According to other preferred embodiments, the clamping screw can be formed by a threaded pin having an internal engagement profile for a tool, in particular a hexagon socket or a hexalobular internal. In this manner, the clamping screw is thus perfectly adapted to the place it is installed and easy to operate at the same time.

Providing the clamping screw with a taper at its threaded end, which is possible as well, further improves the anchoring of the anchoring pin in the keder channel.

Preferably, the head of the fabric anchoring pin can further be provided with a counter bearing protrusion in the entry region of the threaded hole for the clamping screw, the dimensions of the counter bearing protrusion being adapted to the width of the opening slot of the keder channel so as to be able to engage the opening slot of the keder channel in a supporting manner. As a result, a rotary bearing is defined for the head on the one hand, the head being twisted about an axis located transversely to the axis of rotation of the clamping screw when tightening the clamping screw so that the fabric anchoring pin is being straightened. Moreover, the counter bearing protrusion ensures that the fabric anchoring pin is inserted into the keder hem in the correct rotational position so that when the shank is being straightened, an end position of the fabric anchoring pin is reached that is parallel to the longitudinal edges of the slot of the keder channel.

Finally, the head of the fabric anchoring pin can be provided such as to protrude beyond the periphery of the shank so as to form a stop edge for the fabric hem. This ensures that when mounting the fabric anchoring pin, it will not be inserted too far into the hem of the fabric.

Further features, details and advantages of the invention will be apparent from the ensuing description of an exemplary embodiment in conjunction with the attached drawings in which

Fig. 1 shows a side of a fabric anchoring pin,

Fig. 2 shows a view of a profile keder fabric assembly,

Fig. 3 shows an enlarged view of detail III according to Fig. 2,

Fig. 4 shows a sectional view of the profile keder fabric assembly according to section line IV-IV according to Fig. 3;

Figs. 5a, 5b and 5c show, in analogy to Fig. 3, views of the profile keder fabric assembly in a non-distorted condition (a) of the fabric anchoring pin, while the clamping screw is being tightened (b) and in the distorted (c) condition;

Figs. 6a, 6b and 6c show sectional views of the profile keder fabric assembly in analogy to the sectional lines VI-VI in Figs. 5a, 5b and 5c; and

Figs. 7a, 7b and 7c show sectional views of the profile keder fabric assembly in analogy to the sectional lines VII-VII in Figs. 5a, 5b and 5c.

As can be seen from Figs. 1 to 4, the profile keder fabric assembly, a section of which is shown in Fig. 4, has a profile 1 for instance in the shape of a drop-out profile of an awning to which a conventional keder channel 3 is connected in one piece via a web bridge 2 in such a way as to extend in the profile longitudinal direction. A fabric 4, for instance serving as an awning fabric, is provided with a keder hem 5 at its end near the profile by means of which the fabric 4 is secured in the keder channel 3 in the conventional manner using a keder 6 located in the hem 5. Said keder 6 leaves open the entry region 7 of the keder hem 5 to leave room for a fabric anchoring pin 8 to be inserted into the keder hem 5. Said fabric anchoring pin 8 has an elongate shank 9 having a round cross-section and a polygonal block-shaped head 10. The fabric anchoring pin 8 is manufactured in one piece from a plastic material such as PAG6.6GF. In a direction transverse to the longitudinal axis L of the anchoring pin 8, the head 10 is penetrated by a threaded hole 11 that allows a clamping screw 12 in the form of a threaded pin with a hexagon socket 13 to be screwed into. The end of the clamping screw 10 remote from the hexagon socket 13 is configured as a conical tip 14. The threaded hole 11 is formed in the head 10 in such a way that the screw longitudinal axis S forms an obtuse angle W in the order of magnitude of approximately 100° with the longitudinal axis L of the anchoring pin, the angle W opening in the bending direction B of the shank 9.

Furthermore, the head 10 of the fabric anchoring pin 8 is provided with a counter bearing protrusion 18 in the entry region 7 of the treaded hole 11 for the clamping screw 12, said counter bearing protrusion 18 having a width in the direction transverse to the anchoring pin longitudinal axis L that is slightly smaller than the opening slot 19 of the keder channel 3. This allows the counter bearing protrusion 18 to engage said opening channel 19 of the keder channel in a supporting manner, as will be explained in more detail below.

As can be seen in particular from Figs. 1 and 6a, the shank 9 of the non-distorted fabric anchoring pin 8 is slightly bent in the plane E spanned by the anchoring pin longitudinal axis L and the longitudinal axis S of the clamping screw 12 (see Fig. 3). The deflection A at the tip 15 of the shank 9 with respect to the direction of the longitudinal axis L at the root 16 of the shank 9 is selected such as to correspond to approximately 10% of the length I of the shank 9. In relation to the diameter D of the shank 9, said deflection A amounts to approximately 60% thereof.

As can be seen in particular from Fig. 1, the shank 9 of the fabric anchoring pin 8 is provided with retaining ribs 17 distributed across its length, said retaining ribs 17 surrounding the shank 9 in the peripheral direction and having a profile in the manner of sawing teeth. The tips of the retaining ribs 17 point in a direction counter to the direction of extraction Z of the fabric 4 from the fabric anchoring pin 8 such that the retaining ribs 17 inhibit or prevent the fabric 4 from being pulled away from the anchoring pin 8.

Finally, the head 10 of the fabric anchoring pin 8 is configured such as to protrude beyond the periphery of the shank 9, thus forming a stop edge 20 for the keder hem 5 of the fabric 4.

The following paragraphs will now explain, in particular by means of Figs. 5 to 7 comprising the individual steps of a = non-distorted fabric anchoring pin 8, b = tightening the clamping screw 12, and c = distorted fabric anchoring pin, how the fabric 4 is fastened in the keder channel 3.

The fabric 4 is inserted with its keder hem 5 into the keder channel 3 via the opening slot 19 and the keder 6 is inserted into the keder hem 5 in the usual manner. Having done so, a gap remains in the entry regions 7 of the keder hem 5 at each of its ends into which the fabric anchoring pin 8 is inserted with its shank 9 in its non-distorted, in other words bent initial condition until it abuts against the end of the keder hem 5 with the stop edge 20 of the head 10. The head 10 of the fabric anchoring pin 8 is also disposed in the keder channel 3, with the counter bearing protrusion 18 engaging the opening slot 19 of the keder channel 3 - see Figs. 5a, 6a, and 7a.

As can be seen from Figs. 5b, 6b, and 7b, the clamping screw 12 is then tightened, causing the screw 12 to be screwed into the head 10 of the fabric anchoring pin 8 until the tip 14 of the clamping screw 14 finally abuts against the bottom of the keder channel 3 and the head 10 is pivoted about the counter bearing protrusion 18 serving as a rotary bearing in the clockwise direction relative to Figs. 6 and 7 when the clamping screw 12 is tightened even more. When doing so, the lateral regions of the shank 9 just in front of its head 10 and in front of its free end will come into contact with the side edges 21, 22 of the opening slot 19 first, causing the keder hem 5 of the fabric 4 to be pressed against point-shaped loading zones P1, P2 (see Figs. 4 and 6b) in the side edges 21, 22 of the opening slot 19 at a high clamping force. When the clamping screw 12 is tightened even more, and the head 10 of the fabric anchoring pin is pivoted even further, the shank 9 of the fabric anchoring pin straightens more and more counter to its inherent elasticity until the keder hem 5 thereof abuts against the opposite side edges 21,22 of the opening slot 19 of the keder channel 3 such that a line contact is formed at the opposing side edges 21, 22 of the opening slot 19 of the keder channel 3 virtually across its entire length and the fabric 4 is clamped therebetween. At this point, all retaining ribs 17 abut the keder hem 5 as well (see Fig. 7c) so that the fabric 4 is optimally secured in the keder channel 3 such that a displacement thereof is prevented.

Claims

A profile reinforcement strip dew device, in particular awning, comprising - a profile (1), particularly an awning dropout profile, with a reinforcement strip passage (3), - a tablecloth (4), in particular awning with a reinforcement strip hollow seam (5), which is to be fixed in the reinforcement strip passage (3), whereby in the reinforcement strip cavity (5) is provided a reinforcing strip (6) which leaves its mouth area (7) exposed, and - a dewdrop (8) with a head (10) and a shaft (9), which dewlap (8) is inserted with its shaft (9) into the mouth area (7) of the reinforcement strip cavity (5) and fixed in the reinforcement strip passage (3) by means of a clamping screw (12) passing transversely through its head (10), characterized in that - the shaft (9) of the unbolted dewdrop (8) is bent in the plane (E) which is determined by the longitudinal axis (L) and the longitudinal axis (S) of the screw and protrudes increasingly at the tension of the clamping screw (12) around it into the reinforcing groove inserted the head (10) of the tea passage (3) as a counter bearing during the generation of a clamping force on the reinforcement strip hole seam (5).

Profile reinforcement strip tablecloth device according to claim 1, characterized in that in the unstressed state of the tablecloth (8) its bend is dimensioned such that the deflection of the shaft tip (15) with respect to the direction of the longitudinal axis (L) at the shank rod (16) corresponds to between 5% and 20%, preferably between 8% and 15%, especially preferably 10% of the shaft length (I).

Profile reinforcing strip tablecloth device according to claim 1 or 2, characterized in that in the unstressed state of the tablecloth (8), its bending is dimensioned such that the deflection of the shaft tip (15) with respect to the direction of the longitudinal axis (L) at the shaft root ( 16) corresponds to between 40% and 100%, preferably between 50% and 80%, especially preferably 60% of the diameter (D) of the shaft (9).

Profile reinforcing strip dew device according to one of the preceding claims, characterized in that the shank (9) of the dew devil (8) is provided with circumferentially locking ribs (17) which in the profile in a tooth-like manner inhibit reinforcing strip. the retraction direction (Z) of the hole seam (5).

Profile reinforcing strip tablecloth device according to one of the preceding claims, characterized in that in the tensioned end state of the tablecloth (8) its shaft (9) is directed so as to its own elasticity that the sealing strip-hollow seam (5) is clamped between the opposite edge (21, 22) of the opening slot (3) of the sealing strip passage (19) and the shaft (9) of the dewdrop (8) each in a line contact over the full shaft length (I).

Profile reinforcing strip tablecloth device according to one of the preceding claims, characterized in that the bend of the tablecloth (8) is arranged such that under the tension of the tablecloth (8) against the elasticity of its shaft (9), the sealing strip hollow seam (5) is clamped. ) between the opposite edge (21, 22) of the sealing strip passage (3) opening slot (19) on one side and the impact zones (P1, P2) on the shaft (9) of the dewdrop (8) near the head and the end, on the other hand, each in a point contact over the full shaft length (I).

Profile reinforcing strip tablecloth device according to one of the preceding claims, characterized in that the scour length axis (S) of the clamping screw (12) with the longitudinal axis (L) forms a blunt angle (W) which is open to the shaft (9). bending direction (B).

Profile reinforcing strip tablecloth device according to one of the preceding claims, characterized in that the clamping screw (12) is formed by a threaded pin with an internally positioned carrier profile for a tool, in particular an internal hexagon (13) or internal hexagons.

Profile reinforcing strip tablecloth device according to one of the preceding claims, characterized in that the clamping screw (12) is tapered at its end (14) facing inwards.

Profile reinforcement strip tablecloth device according to one of the preceding claims, characterized in that the head (10) of the tablecloth (8) in the mouth area of the threaded bore (11) is provided with a abutment projection (18) for the clamping screw (12) and which supportively engages in the opening slot (19) of the reinforcement strip passage (3).

Profile reinforcement strip tablecloth device according to one of the preceding claims, characterized in that the head (10) of the tablecloth (8) protrudes outside the periphery of the shaft (9) to form an abutment edge (20) for the reinforcement strip hollow seam (5). ).