EP1058762A1

EP1058762A1 - Awning with a dimensionally adjustable winding reel

Info

Publication number: EP1058762A1
Application number: EP99910269A
Authority: EP
Inventors: Karl Hesener
Original assignee: Paul Voss GmbH and Co
Current assignee: Paul Voss GmbH and Co KG
Priority date: 1998-02-25
Filing date: 1999-02-24
Publication date: 2000-12-13
Also published as: DE19807916C2; DE19807916A1; AU2928699A; CA2321858A1; WO1999043911A1

Abstract

The invention relates to an awning with a cloth, a cloth roller, a drawing element, and a winding reel (26) on which the drawing element can be wound and during which the cloth is unwound. The winding reel is designed in such a way that it has a minimal base diameter and such that it is provided with additional components (40) which can be placed on the winding reel (26) and which can be used to enlarge the base diameter of the winding reel (26) to correspond with the maximal dropping length of the cloth.

Description

Awning with adjustable reel

The invention relates to an awning, with a fabric that is attached on the one hand to a fabric roll and on the other hand to a drop bar, with a tension element, by means of which a tensile force acts on the fabric in its unwinding direction, and with a winding element, on the bottom of which the tension element can be wound is, the tension element is wound onto the winding element when the cloth is unwound from the cloth roll and vice versa, the winding element having an adjustable bottom diameter.

The invention further relates to a winding roll for use in an awning.

An awning of the type mentioned is known from EP 0 208 103 AI.

If the fabric is unwound in such an awning, the pulling element is simultaneously wound up by a winding element. If the cloth is unwound by rotating the cloth roll, the tension element is simultaneously unwound from the winding element. In the awning mentioned at the outset, the winding element consists of a truncated cone-shaped winding core firmly connected to the fabric shaft, the winding surface being designed such that when the tension element is wound around the winding core, the turns of the tension element migrate towards the smaller truncated cone surface, and the inclination of the surface line of the truncated cone-shaped winding surface is selected such that when the cloth shaft and thus the two outer winding cores are rotated, the circumference of the outermost sheet layer corresponds to the circumference of the next winding on each winding core.

The problem with such awnings is that when the awning fabric is unwound, the diameter of the fabric shaft decreases continuously, while the outer diameter of the tension elements, which simultaneously wind up on usually cylindrical winding cores, increases continuously. A complete rotation of the fabric shaft also results in a complete rotation of the winding cores. As a result of the different diameters of the windings of the fabric shaft on the one hand and the windings on the winding cores on the other hand, there is a path difference between the tension element and the fabric, which either leads to sagging of the fabric or to high fabric tension. Due to the design with conical winding surfaces, this path difference is to be compensated for in that the individual turns are wound next to one another and not on one another. Corresponding grooves are cut on the outside of the cone.

This configuration has the considerable disadvantage that, particularly in the case of awnings with large drop lengths, correspondingly bulky, laterally very long conical winding cores must be present. But an effort in awning construction is possible covering the entire width of the area to be shaded by the cloth, for example balconies or the like, which is then no longer possible with very long lateral winding cores, ie only certain central areas can be shaded.

In one embodiment it is described that the conical winding surface of the winding cores is formed by four truncated-cone-shaped partial cladding shells, the surface of each cladding shell being delimited at its four lateral edges by an arc of the two circular truncated-cone base areas and by two dividing lines to adjacent cladding shells representative surface lines. The inclination of at least one shell shell long before its surface line can be changed. The inclination can be adjusted to the thickness of the awning fabric.

The inclination is adjusted using set screws, whereby each of the truncated cone shells can be adjusted using three set screws.

This construction is technically extremely complex and is difficult to handle, because the inclination of all four shells must be adjusted accordingly in order to ensure that the tension element runs securely into the grooves on the outside of the outer surface. Only then will the goal be achieved to achieve the path compensation through the increasing or decreasing cone diameter. The four jacket shells supported by the numerous adjusting screws transmit the entire radial pulling force, which is considerable for awnings with large drop lengths. Therefore, another technology has prevailed in this field, namely the tension element is wound on winding rollers with a cylindrical core, in such a way that a loop is wound onto the underlying loop of the previously wound tension element.

Such an awning is known from DE 43 06 498 C2.

The tension element can be in the form of ropes, metal bands or textile bands.

The cover described in this document is characterized in that the diameter of the bottom of the winding roll, on which the first turn of the tension element comes to rest, is at least as large as the diameter of the fully wound cloth roll.

The aim of this measure is that the tension in the fabric is as low as possible when the awning is retracted, and is highest when fully rolled out. The tensile stress increases linearly with the unwinding of the fabric.

Such a course of the fabric tension is therefore sought to ensure that the fabric of the awning is always sufficiently tensioned even with large drop lengths. This is to prevent the cloth from sagging, which is not very appealing and acts as a collecting basin for the rainwater when it rains. At the same time, however, the cloth must not be stretched, since in such a case the warp threads of the cloth can be overstretched and there is therefore a risk that the cloth will be stretched out. It has now been shown that with relatively small awning drop lengths, ie up to approximately 2 m, no increasing course of the fabric tension is required. Rather, in this area, ie if only a comparatively small extended fabric surface is actually to be tensioned, a different design of the fabric tension can be selected. In particular, one can initially accept, for example, in favor of a greater increase in the fabric tension in the case of large failure lengths, a decrease in the fabric tension in the case of small failure lengths.

In particular in those constructions in which the running difference between the fabric and the tension element during winding or unwinding takes place by means of a spring-loaded displacement, e.g. DE 36 10 635 AI, DE 38 06 621 Cl or EP 0 208 108 AI, the tension of the spring is sufficient to cause a basic tension of the cloth, which prevents sagging in the case of drop lengths of up to approx. 2 m.

It is important, first of all, that the awning fabric is always stretched to the extent that it does not sag when it is extended, and that the maximum tensile stress does not exceed the maximum values permitted for the awning fabric used. This must be taken into account when designing the assembly of each individual awning.

Since with increasing drop lengths a stronger fabric tension is required per se, the awning must be designed in particular depending on the maximum drop lengths and the resulting maximum fabric tension. In the event of different lengths of the fabric, more or fewer windings on the fabric or tension element must then be taken up by the fabric or winding roll.

The object of the present invention is therefore to provide an awning of the type mentioned, which can be easily and therefore inexpensively adapted to the maximum drop lengths in order to obtain a favorable fabric tension characteristic.

The object is achieved by an awning of the type mentioned in that the winding element is designed as a winding roller which has a minimal base diameter, and that additional components are provided which can be applied to the winding roller and with which the base diameter of the winding roller can be enlarged , depending on the maximum length of the fabric.

This measure has the advantage that the same winding roll can always be used in awnings with different drop lengths and that the adaptation to the individual drop lengths takes place through the additionally provided components. In this way, a single type of winding roll for awnings with different lengths can be produced. Since the winding rolls are mostly an integral part of the cloth rolls, identical modules made of winding and cloth rolls can now be used for a large number of awnings with different lengths. The adaptation to longer fabric lengths is done by the additional components to enlarge the bottom diameter. This adaptation leads in a highly advantageous manner to comparable fabric tensioning characteristics with different cloth lengths, so that one and the same cloth material can be used universally for different cloth lengths. If the winding roll diameter remained the same with increasing cloth roll, the running difference between the cloth and tension element would become ever larger, so that different cloth tension characteristics are present in each case, which can lead to damage.

This is now excluded by the invention in that the bottom diameter can be enlarged and can be adapted to the changed cloth roll diameter without the complete winding roll having to be replaced and replaced by another.

The winding roll with a minimum base diameter can be used for a certain minimum length of cloth, e.g. 2 m. If longer lengths of cloth are then provided, the minimum base diameter is gradually increased, that is to say adapted to the increasing cloth roll diameter when the cloth is completely wound up.

In a preferred embodiment of the invention, the winding roll has two side disks, between which the tension element is wound, the two side disks being provided with mutually opposite aligned openings, first openings being arranged at a first radial distance from the center of rotation of the winding roll, and wherein further openings are each arranged at a greater radial distance from the center of rotation of the winding roll, and that bolts can be inserted into the corresponding openings to enlarge the bottom diameter of the winding roll. This measure has the advantage that the corresponding openings can already be provided in the original manufacture of the winding roll, into which the bolts are then inserted according to the length of the cloth, around which the tension element is then wound. This process is simple and can be carried out during assembly on site, namely by inserting the bolts into the corresponding openings and then not pulling the tension element around the bottom of the winding roll, but rather wrapping it around the inserted bolts, the outer circumferential sleeve line of which is then represent the new adapted diameter larger floor.

In a further embodiment of the invention, the openings are offset circumferentially from one another with increasing radial distance from the center of rotation.

This arrangement has the advantage that the stability of the winding roll is not affected by the holes.

In a further embodiment of the invention, openings with the same radial spacing are circumferentially arranged several times.

This measure has the advantage that, through numerous openings arranged circumferentially, for example six or more, the bolts create a floor which is always "rounder" and is more and more adapted to the concentric movements of the awning.

In a further embodiment of the invention, the winding roll has a base body and two side disks, between which the tension element is wound, and for enlargement of the bottom diameter of the winding roll, at least one enlargement ring is provided, which can be mounted between the two side windows.

This measure has the advantage that a circular bottom with a larger diameter is created by the ring body, which is conducive to the previously mentioned concentricity.

In a further embodiment of the invention, a magnification ring consists of at least two circular ring sections.

This measure has the advantage that the ring sections can, for example, be clipped onto the central base body, that is to say onto the original base of the winding roll.

This is an easy installation task that can be carried out very easily and quickly.

In a further embodiment of the invention, at least one of the side windows can be removed from the base body for mounting a magnification ring.

This measure has the advantage that only one side window is removed for enlargement, the enlarging ring has to be pushed onto the base body and then the side window can be attached again. This process is also easy to carry out on site at the construction site.

In a further embodiment of the invention, the bottom diameter of the winding roll is chosen so that this min- 10

is at least 10% smaller than the diameter of the cloth roll with the cloth completely wound up.

This measure has the advantage that it achieves a tension characteristic that is particularly gentle on the fabric and is also obtained with the different diameter sizes of the winding roll.

With this characteristic, more fabric is unwound than tension element during the first unwinding turns, since the diameter of the fabric roll is larger than the diameter of the winding roller including the wound tension element. As a result, the fabric tension initially decreases somewhat, which, as mentioned at the beginning, is harmless with short drop lengths of up to approx. 2 m. Only when the diameter of the cloth roll plus the cloth wound on it becomes smaller than the diameter of the winding roll plus the tensile element wound on it, is less cloth unwound than the tensile element per revolution. From this state, the fabric tension then increases, which is advantageous in the case of longer drop lengths, since a higher fabric tension is then required in order to completely prevent sagging due to the weight of the unwound fabric.

In a further embodiment of the invention, as is known per se, the winding roll and the cloth roll are arranged coaxially with one another, and the tension element is deflected via a deflection roller at the outermost dropout.

This measure has the advantage that a particularly compact awning is provided in the area of the driven roll of fabric. The corresponding manipulations for change 11

of the diameter of the winding roll can be made during assembly and then, for example, the awning box in which the cloth roll is accommodated can be closed accordingly on all sides.

The invention also relates to a winding roll as such, since the invention is also implemented in the winding roll which can be traded as an independent roll. The same applies to module components of the winding roll and the cloth roll, which can be displaced relative to one another, for example with a spring mechanism, and are designed as a compact module unit.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the combination specified in each case, but also in other combinations or on their own without departing from the scope of the present invention.

The invention is described and explained in more detail below on the basis of a few selected exemplary embodiments in conjunction with the accompanying drawings. Show it:

1 is a schematic side view of an awning,

2 is a side view of a winding roll,

3 shows a section along the line III-III in FIG. 2,

4 is a partial side view of an awning with a small fabric length, 12

5 comparable view of an awning with a large fabric length,

6 is a diagram in which the fabric tension TS is plotted against the fabric length to show the fabric tension characteristics,

FIG. 7 shows a representation, comparable to the section of FIG. 3, of a further exemplary embodiment of a winding roll with a magnification ring applied to it

Fig. 8 is a plan view of another embodiment of such a magnification ring, which is composed of two half rings.

In Fig. 1 an awning is designated in its entirety with the reference number 10.

The awning 10 has a housing 12 which is mounted on a building 14.

A cloth roll 16 is received in the housing 12, to which one end of a cloth 18 is fastened and onto which the cloth 18 is wound up or unwound. The opposite end, the so-called dropout of the cloth 18 is connected to a drop bar 20.

The drop rod 20 is connected to a tension element 22 in the form of a textured band, which is guided to a deflection roller 24 at the outermost dropout, deflected there and to one 13

Winding roll 26 is returned, which sits on a lateral journal 17 of the cloth roll 16.

The axis of rotation 39 of cloth roll 16 and winding roll 26 therefore coincide.

On the other side of the towel roll 16 opposite the illustration in FIG. 1, a winding roll is again arranged in mirror image, and accordingly a second tension element is also arranged on the other side of the towel 18.

The deflection roller 24 is mounted in a guide rail, not shown here.

If the cloth roll 16 is rotated clockwise in the embodiment shown in FIG. 1, for example by a motor or by a crank mechanism, the pulling element 22 is wound onto the winding roll 26 and pulls the extension rod 20 off the cloth roll 16, the cloth 18 is processed.

In the reverse direction of rotation, the cloth 18 is wound onto the cloth roll 16 and the tension element 22 is unwound from the winding roll 26.

Since the diameter of the cloth roll 16 together with the cloth 18 wound thereon and the diameter of the winding roll 26 including the tension element 22 wound thereon, uneven lengths, for example, are unwound on the cloth 18 per revolution of the cloth roll 18 than simultaneously wound on the winding element 26 on the tension element 22 becomes. To compensate for the voltage differences associated therewith, for example, cloth roll 16 and winding roll 14

26 rotatable relative to one another against the force of a spring, as is known per se.

2 and 3, the closer configuration of a first embodiment of a winding roll 26 is shown in more detail.

The winding roll 26 consists of a central, round base body 29 which is delimited on both sides by side disks 30 of larger diameter. The peripheral surface of the base body 29 forms a bottom 28 of the winding roll 26.

A central through opening, not shown here, is used to mount the winding roll 26 on the lateral journal 17 of the cloth roll 16.

Through openings 31, 32, 33 and 34 are provided in the side windows 30 and are aligned with one another.

The radial distance of the openings 31, 32, 33 and 34 to the axis of rotation 39 is continuously increasing.

The openings 31, 32, 33 and 34 are slightly offset circumferentially from one another.

There are a total of six openings 31 arranged circumferentially offset from one another by 60 °, this also applies to openings 32, 33 and 34, so that six groups of openings 31, 32, 33 and 34 are present. 15

The openings 31, 32, 33 and 34 are provided so that 39 bolts 40 are pushed through a series of openings at the same radial distance from the axis of rotation.

In Fig. 2, six bolts 40 are inserted into the openings 34.

This serves to change the diameter of the bottom of the winding roll 26, which originally has a diameter 36, into a larger diameter, namely the diameter 38, as is indicated in FIG. 3. This means that the tension element 22 is no longer placed around the base 28, but rather is wound around the six bolts 40 inserted into the openings 31, 32, 33 and 34, as a result of which a new base with a hexagonal contour is created.

From the side view of Fig. 2 it can be seen that the series of openings 31 is intended for cloth lengths of about 2 m, the series 32 for cloth lengths of 3 m, the series 33 for cloth lengths of 4.5 m and the series 34 to be fitted with bolts 40 for fabric lengths of 6 m.

That is, depending on the length of the fabric, the bolts 40 are then inserted into the corresponding series of holes.

A practical example is shown in FIGS. 4 and 5.

In Fig. 4, the tension element 22 is placed around the original floor 28.

The diameter 36 of the winding roll 26 or of the base 28 is in a certain size ratio to the diameter 42 of the cloth roll 16 with the cloth 18 fully wound. 16

The ratio of diameter 42 to diameter 36 is approximately 1.1-1.2. This achieves a fabric tension characteristic as described below in FIG. 6.

The proportions are not true to scale, but are increasingly shown for illustrative purposes.

In Fig. 5 a variant is shown in which the cloth 18 has a much larger drop lengths.

The pins 40 are now inserted into the series of holes 33 and the tension element 22 is wound around the outside of the six bolts 40.

The diameter of the newly created "bottom" of the winding roll is designated 37 and is larger in comparison to the original bottom 28 (see FIG. 2).

Since the cloth 18 is also longer in this case, namely 4.5 m, the diameter 43 of the cloth roll 16 together with the wound cloth is correspondingly larger.

However, the ratio between the diameters 43 and 37 remains approximately the same, ie approximately 1.1-1.2.

This also results in a comparable fabric tension characteristic if you now compare the fabric tension and fabric lengths or failure path. 17

A series of such cloth tension characteristics are now graphically represented in FIG. These curves are based on the following relationships.

Length of diameter the diameter of the ratio

Tuches [m] completely completely unwound

Cloth roll [mm] winding roll [mm]

DT DW

I _*! = 2 101 92 1.1

L ₂ = 3 109 97 1.1

L ₃ = 4 115 103 1.1

L ₄ = 5 122 110 1.1

L ₅ = 6 128 115 1.1

From Fig. 6 it can be seen that the fabric tension first decreases (up to approx. 1.5 m drop length) and then increases continuously. The basic tension G is reached again after a drop length of 2 m. All fabric tension characteristics are comparable.

7 shows a further exemplary embodiment of a winding roll 44.

The winding roll 44 has a base body 46, the circumference of which represents a base 48. One side window 50 is fixedly connected to the base body 46, the other side window 52 is detachably connected via screws 54.

If the diameter of the base 48 is now to be increased, the side window 52 can be removed, a enlargement ring 46 can be pushed on and then the side window 18th

52 can be screwed on again. This creates a new bottom, the outer diameter of which corresponds to the outer diameter of the enlargement ring 56.

8 shows a further variant of a magnification ring 60, which is composed of two half rings 62 and 64 which can be connected to one another via a clip catch 66.

In this case, the winding roller 44 does not need to be dismantled, but the half rings 62 and 64 can be pushed directly onto the original base body of a winding roller and clipped together, thereby increasing the diameter of the base.

Claims

19 patent claims

Awning, with a fabric (18), which is attached on the one hand to a fabric roll (16) and on the other hand to a drop bar (20), with a tension element (22), by means of which a tensile force acts on the fabric (18) in its unwinding direction, and with a winding element, on the bottom (28, 48) of which the tension element (22) can be wound, the tension element (22) being wound onto the winding element when the fabric (18) is unwound from the fabric roll (16) and vice versa, and wherein the winding element has an adjustable base diameter (36, 37, 38), characterized in that the winding element (26, 44) is designed as a winding roller (26, 44) which has a minimum base diameter (36), and in that additional components (40, 56, 60) are provided, which can be applied to the winding roller (26, 44) and with which the bottom diameter of the winding roller (26, 44) can be enlarged, depending on the maximum length of the sheet (18).

Awning according to claim 1, characterized in that the winding roller (26) has two side windows (30) between which the tension element (22) is wound up, that the two side windows (30) with mutually opposite aligned openings (31, 32, 33, 34) are provided, first openings (31) being arranged at a first radial distance from the center of rotation (39) of the winding roll (26) and further openings (32, 33, 34) in each case 20th

larger radial distance from the center of rotation (39) of the winding roller (26) are arranged, and that to enlarge the bottom diameter of the winding roller (26) bolts (40) can be inserted into the openings (31, 32, 33, 34).

3. Awning according to claim 2, characterized in that the openings (31, 32, 33, 34) are offset circumferentially from one another with increasing radial distance from the center of rotation (39).

4. Awning according to claim 2 or 3, characterized in that the openings (31, 32, 33, 34) are circumferentially arranged several times with the same radial distance.

5. Awning according to claim 1, characterized in that the winding roll (44) has a base body (46) and two side windows (50, 52), between which the tension element (22) is wound up, and that to enlarge the bottom diameter of the winding roll ( 44) at least one enlargement ring (46, 60) is provided, which can be mounted coaxially to the base body (46) between the two side windows (50, 52).

6. Awning according to claim 5, characterized in that the enlarging ring (60) consists of at least two circular ring sections (62, 64).

7. Awning according to claim 5, characterized in that for mounting the enlarging ring (56) at least one of the side windows (52) from the base body (46) is removable. 21

8. Awning according to one of claims 1 to 7, characterized in that the bottom diameter of the winding roll (26, 44) is chosen so that it is at least 10% smaller than the diameter of the cloth roll (16) with the cloth completely wound (18) .

9. Awning according to one of claims 1 to 8, characterized in that the winding roller (26, 44) and the cloth roller (16) are arranged coaxially to one another and that a deflection roller (24) is provided on the outer dropout via which the tension element ( 22) transfers its tensile force to the cloth (14).

10. winding roller for use in an awning according to one of claims 1 to 9, characterized in that the winding roller (26, 44) has a minimum bottom diameter (36), and that additional components (40, 56, 60) are provided which can be applied to the winding roller (26, 44) and with which the bottom diameter of the winding roller (46, 44) can be enlarged, depending on the maximum length of the sheet (18).

11. winding roll according to claim 11, characterized in that it has the characterizing features of claims 2 to 7.

12. winding roller according to claim 10 or 11, characterized in that it is connected as a modular component with a core of a cloth roll (16), the core being rotatable relative to the winding roller against the force of a spring about its common longitudinal axis.