EP0146678A2 - Roller blind for a window - Google Patents

Abstract

An awning contains two guide rails that run vertically and parallel to each other underneath a winding shaft and are attached to the wall of a building. Two extension arms (8, 9) run in the guide rails at one end with a drop rail running parallel to the winding shaft. In order to be able to give the drop arms (8, 9) a pivoting movement, two first stop devices (38) are seated in the guide rails, which can be brought into engagement with second stop devices (42), the drop arms (8, 9), so that when the awning cover is unwound from the retracted position, the two substantially vertically extending drop arms (8, 9) first slide down in the guide rails until the first stop engages with the second stop devices (38, 42) and then pivot around the first stop devices (38). In order to be able to reach a large swiveling range of the extension arms (8, 9), each of the first two stop devices (38) has at least one extension (41) projecting in the path of movement of the associated second stop devices (42) and each of the two second stop devices (42 ) each formed by at least two extensions (43), the spacing of which is dimensioned such that the extension (41) of the first stop device (38) fits between them.

Description

The invention relates to an awning with two underneath a winding shaft connected to an awning fabric, arranged vertically and at a distance from one another, which are attached to a wall or the like of a building on both sides of a window, with two ends at one end parallel to the winding shaft and Fall rails attached to the front edge of the awning fabric and connected to each other, which are mounted on the other side in the associated guide rail so as to be displaceable and pivotable, and with two first stop devices arranged at the same height in the area of the guide rails, which are provided with ends of the extension arms on the guide rail ends second stop devices can be brought into engagement, the two substantially vertically extending extension arms initially in the guide rails when the awning fabric is unwound from the retracted position until the first and the second A engage sling devices slide down together and then swing around the first sling device.

In awnings of this type, which are also known as awnings, difficulties arise when the extension arms are at an angle of should be unfolded more than 90 ° from the vertical, because then there may be a distribution of forces that prevents the awning arms from being properly folded into the vertical position before the awning arms are raised. In addition, the known constructions of this type are sensitive to wind, in that the wind can get caught under the extended awning and cause it to flip up, which, apart from being unsightly, also leads to damage to the awning.

The object of the invention is to further develop the aforementioned awning in such a way that the extension arms can be moved from their vertical rest position with the drop rail located above to the 90 ° position in the direction of the other vertical position, in which the drop rail can be located below the bearing point of the extension arms is located without the danger when retracting the awning that the extension arms can not be folded back beyond the 90 ° position towards their rest position.

To achieve this object, the awning according to the invention is characterized by the features of the main claim.

Due to the design of the two interacting stop devices, a positive locking of the extension arms is achieved in both directions of movement, so that when the awning is retracted, the extension arms initially correspond to the rest position have to fold up the vertical position before they can move up in the guide rails when retracting the awning cover.

The extension arms can be swiveled by approximately 180 ° when the awning is extended if the extensions of the first stop device are formed by teeth of a rack section running parallel to the respective guide rail and the extensions of the second stop device are formed by the teeth of a gearwheel segment, the center of which is coaxial with the pivot axis of the associated drop arm. With this arrangement, if the two rack sections are fastened at such a height that their uppermost tooth is located at a point where the vertical movement of the extension arms changes into the swiveling movement, it is possible that the awning fabric and the drop rail initially become one predetermined distance in front of the window moved vertically before the awning takes place.

If, in the case of very high windows, the awning should be lowered further, for example for the purpose of darkening the interior, after the extension arms have been completely transferred into the downward-pointing vertical position, the length of the two rack sections is dimensioned such that the farthest underlying tooth is at a height at which the drop arms pivoted by approximately 180 ° with respect to the starting position come out of engagement with their gearwheel segments from the rack sections.

In order to reduce the tensile stresses in the awning fabric when the awning is fully lowered, in which the extension arms have assumed their downward-pointing vertical position, a cam is arranged below the first stop device, which, in order to swing up the extension arms again cooperates with a cam track on the underside of the associated drop arm, such that when the substantially drop down arm is guided, the drop arm is pivoted by a predetermined angle in the direction of the rest position when it comes into engagement with the first stop device. This cam, together with its cam track, results in a more favorable leverage ratio on the extension arm than the corresponding gear segment for the pivoting-up movement, because the distance from the cam to the pivot point of the respective extension arm is greater than the pitch circle radius of the gear segment.

The assembly and setting of the awning is simplified if the cam and the rack section are arranged on a common base plate, because in this way only one construction element needs to be adjusted, while the relative position between the rack section and the cam specified by the extension arm is constant regardless of the adjustment is held.

The assembly is further simplified if the first and the second stop device as well as, if necessary, the cam in the guide rail designed as a longitudinally slotted hollow profile, because then everything can be delivered to the construction site in the preassembled state. Here, the arrangement becomes particularly simple if the first stop device and, if appropriate, the cam were seated in a longitudinally slotted chamber of the guide rail adjacent to the wall of the building and towards the respective drop arm, the chamber extending over the entire length of the guide rail, so that a continuous profile can be used, in which the stop devices and the cams can be locked at any point, while for the extension arm, which slides back and forth in the guide rail or swivels, a smooth-walled profile is available, the jamming of the Helps prevent failure arms in the guide rail.

Particularly reliable sliding of the drop arms in the guide rails is achieved if each of the drop arms is rotatably mounted in an associated guide slide which is guided in a longitudinally displaceable manner in the corresponding guide rail.

If the awning fabric is initially to be guided downward within a predetermined section parallel to the window surface even when the extension arms are extended, a rotatably mounted deflection roller, which extends parallel to the winding shaft and whose distance from the pivot point of the extension arms in, is held on the two guide slides the two guide carriages is greater than the distance of the pivot points from the drop rail.

A very robust guide carriage is obtained if it contains two parallel, spaced-apart, frame-forming U-rails, which are connected to each other at a predetermined distance from one another, facing the base of the U-profile, and at their upper and lower ones End each carry guide rollers with which they run along the guide rails, while the respective drop arm is mounted between the profile rails.

The sensitivity of the awning to being raised in the wind is reduced if at least one of the extension arms is spring-biased from the vertically upward position towards the vertically downward position with respect to the own pivot point. However, the two extension arms are preferably biased equally in order to avoid warping.

Space-saving conditions result in coil springs which engage on one end on a pivot pin connected to the respective drop arm in a rotationally fixed manner and on the other end are supported in the guide rails or in the respective guide carriage.

• _Fig. 1 in einer perspektivischen Darstellung zwei Markisen gemäß der Erfindung, die vor zwei Fenstern eines nicht weiter gezeigten Gebäudes angebracht sind, in unterschiedlichen Betriebsstellungen,
• Fig. 2 einen Abschnitt einer Führungsschiene der Markise nach Fig. 1, mit teilweise weggebrochener Seitenwand, in einer perspektivischen Darstellung,
• Fig. 3 einen der beiden Führungsschlitten der Markise nach Fig. 1, in verkürzter perspektivischer Darstellung, mit abgebrochen veranschaulichtem Ausfallarm,
• Fig. 4 die erste und die zweite Anschlageinrichtung der Markise nach Fig. 1, in einer perspektivischen Darstellung,sowie die Wickelfeder zum Vorspannen des zugehörigen Ausfallarms, und
• Fig. 5 bis 8 das Zusammenwirken zwischen dem Zahnstangenabschnitt und dem Zahnradsegment eines Ausfallarms sowie des Nockens und der zugehörigen Nockenbahn, in unterschiedlichen Betriebsstellungen, in einer Seitenansicht.

Exemplary embodiments of the subject matter of the invention are shown in the drawing. Show it:

• _F ig. 1 is a perspective view of two awnings according to the invention, which are attached in front of two windows of a building, not shown, in different operating positions,
• 2 shows a section of a guide rail of the awning according to FIG. 1, with the side wall partially broken away, in a perspective view,
• 3 shows one of the two guide carriages of the awning according to FIG. 1, in a shortened perspective view, with a broken out illustrated arm,
• Fig. 4, the first and the second stop device of the awning according to Fig. 1, in a perspective view, and the clock spring for biasing the associated extension arm, and
• Fig. 5 to 8, the interaction between the rack section and the gear segment of a drop arm and the cam and the associated cam track, in different operating positions, in a side view.

In Fig. 1, an awning 1 is illustrated, which is attached in front of a window 2 of a building, not shown, and in a box 2 open at the bottom contains a winding shaft, not further visible, onto which an awning cloth 4 can be wound, with its rear edge on the winding shaft is attached. Below the winding shaft on the wall of the building next to the window 2 two guide rails 5 and 6 are attached, which run parallel and vertically at a distance from each other. The two guide rails 5 and 6 are provided with a longitudinal slot 7, mutually identical longitudinal profiles and are used for the slidable mounting of two extension arms 8 and 9, which lead at one end through the slots 7 of the guide rails 5 and 6 in the interior thereof and at the other on one parallel to the winding shaft extending fall rail 11 are attached to which the front edge of the awning fabric 4 is anchored.

Together with the drop arms 8 and 9, a guide roller 12 moves in front of the guide rails 5 and 6, which is arranged parallel to the drop rail 11 and is connected in a manner explained below to the end of the two drop arms 8 and 9 on the guide rail side.

In front of another window 13 shown next to window 2, the same awning 1 is illustrated attached, but which is in a different operating position, namely the rest position with retracted awning fabric 4. In this Position, the drop arms 8 and 9 are folded approximately vertically, so that the drop rail 11 is located directly under the rotatable deflection roller 12.

The guide rails 5 and 6 have the approximately rectangular cross section shown in FIG. 2, which is delimited by two side walls 14 and 15 and the front wall 16 containing the slot 7 and the front wall 16 parallel and at a distance from the rear wall 17. Adjacent to the rear wall 17 are two strips 18 and 19 which extend over the entire length of the guide rail 5 and 6 and are aligned with one another and delimit a continuous longitudinal slot 21 on the inside of the two side walls 14 and 15. In this way, the interior of the guide rails 5 and 6 of the two strips 18 and 19 and the continuous longitudinal slot 21 is divided into a front and a rear chamber 22 and 23, respectively. The front chamber 22 serves to receive a guide carriage 24 shown in FIG. 3, in which the extension arms 8 and 9, which are shown broken off in FIG. 3, are rotatably mounted.

The guide carriage 24 is formed by two parallel and spaced-apart struts 25, 26 with a U-profile, which are fastened to one another in a known manner with their bases 28 and 29, so that the free legs of the U-profiles 25 and 26 point away from one another . For easier mobility of the guide carriage 24 in the front chamber 22 of the guide rails 5 and 6, the guide carriage 24 contains at its upper and at its lower end two coaxial rollers 31 which are rotatably mounted on the bases 28 and 29 of each of the two profiles 25 and 26 and with their peripheral surface over the free legs of the U-profiles 25 and 26 protrude, which is why the free legs in the region of the rollers 31 are shortened in the manner shown in FIG. 3. In operation, the guide rollers 31 run on the inside of the front wall 16 on both sides of the longitudinal slot 7 on the one hand and on the strips 18 and 19 on the other hand, which separate the front chamber 22 from the rear chamber 21.

Just above the lower pair of rollers 31, the respective extension arm 8 or 9 is pivotally mounted in the guide carriage 24 by means of a pivot 32 which runs axially parallel to the rollers 31. The pivot 32 leads through two aligned openings in the base 28 and 29 of the two U-profiles 25 and 26 and through the guide rail end of the extension arm 8 and 9, which is located between the two U-profiles 25 and 26, the to this - as Fig. 3 shows - have a width corresponding to the width of the drop arms 8 and 9 or slightly larger distance from each other, so that the drop arms 8 and 9 can pivot between the U-profiles 25 and 26. In order to be able to introduce a pretensioning force into the extension arms 8 or 9 via the pivot pin 32, the pivot pin 32 is preferably rotationally fixed attached to the guide rail end of the respective drop arm 8,9 in a known manner and protrudes beyond the base 28 and 29, so that on the protruding part in Fig. 4 shown spirally wound leaf spring 33 can be placed, the inner end 34 of which is seated in an open longitudinal slot 35 of the pivot pin 32 and the outer end of which is supported on an edge leg of the U-profile 25 or 26.

In the area of the upper pair of rollers 31, between the two U-profiles 25 and 26 forming the frame of the guide carriage 24, there is a tab 37 approximately at right angles, which is firmly connected to the U-profiles 25 and 26 and, when the guide carriage 24 is inserted, through the Longitudinal slot 7 protrudes from the guide rails 5 and 6; the tab 37 serves to hold the rotatable deflection roller 12.

So that the drop arms 8 and 9 can assume the operating position illustrated in connection with the window 13 according to FIG. 1, in which the drop rail 11 is located directly under the deflection roller 12, the length of the guide carriage 24 is dimensioned in the vertical direction so that the distance from the pivot pin 32 of the dropout 8 and 9 to the tab 37 or the underside of the deflection roller 12 is correspondingly greater than the distance from the pivot pin 32 to the front edge of the drop rail 11.

In order to cause the drop arms 8 and 9, which initially slide vertically inward in the folded-up state, to perform the welding movement, as shown in FIG. 1, sits in the rear chamber 23 of the guide rails 5 and 6, the rack section 38 illustrated in FIG. 4, which is formed on a base plate 39, which corresponds in cross section to the cross section of the rear chamber 23, while the rack section 38 with its teeth-41 through the centrally extending longitudinal slot 21 protrudes into the front chamber 22. A toothed wheel segment 42 cooperates with the toothed rack section 38, the teeth 43 of which can mesh with the teeth 41 of the toothed rack section 38, for which purpose - as shown in FIG. 4 - the toothed wheel segment 42 is formed on the end of the drop arms 5 and 6 on the guide rail side. The assignment is made in such a way that the axis of the gear segment 42 coincides with the axis of the pivot pin 32, so that when the drop arm 5, 6 mounted in the guide carriage 24 together with the guide carriage 24 is guided past the rack section 38, the teeth 43 of the gear segment 42 mesh with the teeth 41 of the rack section 38 and the gear segment 42 is given a corresponding rotary movement, which leads to a cycloidal movement of the extension arms 8 and 9.

Below the rack section 38, a cam 44 is formed on the base plate 39 at a predetermined distance, which also protrudes through the longitudinal slot 41, but only rises from the base plate 39 to such an extent that the drop arm 8, 9 folded down into the lower vertical position with its Gear segment 42 or with that tooth 43 past the cam 44 can, which is in the vertically downward position of the drop arm 8,9 of the base plate 39 adjacent. The cam 44 interacts with a cam track 45, which is formed on the underside of the extension arms 8, 9 and has the shape shown in FIG. 4, the highest point of the cam track 45 being approximately the same distance from the adjacent tooth 43 as the lowest Tooth 41 of the rack section 38 from the cam 44, so that the function described below comes about, from which the dimensioning and the exact position also result in detail.

As already explained above, in the retracted position of the awning 1, the extension arms 8 and 9 are folded up essentially vertically, with the falling rail 11 being located directly below the deflecting roller 12, as shown in the window 13. If, starting from this position, the awning fabric 4 is unwound from the winding shaft ', the dead weight of the arrangement, consisting of the drop arms 8 and 9, the associated guide slides 24 in the guide rails 5 and 6 of the fall rail 11 and the on Guide carriage 24 attached deflection roller 12 for this whole arrangement in the guide rails 5 and 6 to move downwards without the extension arms 8 and 9 folding down from their vertically upward position because the awning fabric 4 is guided upwards under the deflection roller 12 is, and also against the biasing force of the coil springs 33rd

The end of the drop arms 8, 9 on the guide rail side moves downward in the position illustrated schematically in FIG. 5 in the guide rails 5 and 6. In this working area of the awning 1, the awning fabric 4 is pulled down vertically in front of the window 2 or 13 without being opened.

As soon as the guide carriage 24 is lowered further as a result of the awning fabric 4 being unwound, the gear segments 42 of the two extension arms 8 and 9 meet the rack sections 38 fastened in the guide rails 5 and 6, as illustrated in FIG. 6, the guide carriage 24 can now only meet in the Move dimensions downward, in which the gear section 43 rolls onto the rack section 38, since the gear section 42 is diametrically opposite the fastening point of the drop rail 11 on the drop arm 8, 9 with respect to the pivot pin 42.

It will be seen _'that the fastening point of which is arranged at the same height rack portions defines 38 in the guide rails 5 and 6 that location at which the down arms 8.9 - transition to the pivot movement - starting from its vertically raised position. The swivel angle achieved depends on how far the awning fabric 4 is unwound.

Since in the illustrated embodiment a further lowering of the awning fabric 4 should be possible after the extension arms 8 and 9 are folded down into the vertically hanging position are, the rack section 38 has such a length that - as soon as this position is reached - the gear segment 42 can come free from the rack section 38, as shown in Fig. 8. This makes it possible that the extension arms 8 and 9 can now carry out a further downward sliding movement in the guide rails 5 and 6 in the vertically downward hanging position together with their guide slide 24, the awning fabric 4 vertically in front of the window 2 as far as the fall rail 11 is pulled down.

When the awning 1 is retracted from the position described last, the guide carriages 43 with the downward-hanging drop arms 8 and 9 run upwards due to the pulling force exerted by the awning cloth 4, the toothed ring segment 42 first passing the cam 44, so that the cam 44 come into engagement with the cam track 45 and when sliding along the inclined cam track 45 up to its highest point the respective extension arms 8, 9 can pivot a little upwards in the direction of the rest position. The cam track 45 is designed in such a way that - when the first tooth 43 of the ring gear segment 42 meets the lowermost tooth 41 of the rack section 38 - the extension arms 8 and 9 are already pivoted outwards by approximately 15 to 20 °, which means that for the further pivoting of the extension arms 8 and 9 due to the rolling movement of the gear segment 42 on the rack section 38, a more favorable triangle of forces results from the angles of the extension arms 8 and 9 and the angle of the awning fabric between the deflection roller 12 and the drop rail 11. When the awning cover is retracted further, it will roll - as before described - again the sprocket segments 42 on the rack sections 38, whereby the extension arms 8 and 9 projecting through the longitudinal slots 7 into the interior of the guide rails 5 and 6 are folded up, as shown in FIGS. 6 and 7. When moving in further, the position shown in FIG. 5 is finally reached again, in which the two extension arms 8 and 9 are folded up substantially vertically, while the drop rail 11 is located below the deflection roller 12.

Although not expressly described, it is clear that even when the awning 4 is extended, the cam 44, as described when retracting, comes into engagement with the cam track 45 and thus ensures a reduction in the tension in the awning fabric 4 when the extension arms 8 and 9 approach the vertically hanging position.

The awning 1 described so far can be delivered prefabricated to the construction site, whereby after fastening the guide rails 5 and 6 to the house facade, the base plate 39, which is initially longitudinally displaceable in the rear chamber 23, is adjusted into the correct position with the toothed rack section 38 and the cam 44, and there is temporarily secured in a known manner by means of studs, not shown, through the longitudinal slots 7 and 21 to the inside of the rear wall 17. As soon as the adjustment of the two base plates 39 in the guide rails 5 and 6 has been completed, the base plate 39 is drilled from the front, through the longitudinal slots 7 and 21, and, for example by means of self-tapping screws, is firmly screwed to the rear wall 17.

Claims (16)

1.Awning with two guide rails arranged vertically and at a distance from one another underneath a winding shaft connected to an awning cloth and fastened to a wall or the like of a building on both sides of a window, with two ends at one end by a parallel to the winding shaft and at the The front edge of the awning fabric is attached to the drop rail, which is connected to one another and which, at the other end, is displaceably and pivotably mounted in the associated guide rail, and with two first stop devices arranged at the same height in the area of the guide rails, which are provided with second stop devices provided on the guide-side ends of the drop arms can be brought into engagement, wherein when the awning fabric is unwound from the retracted position, the two essentially vertical extension arms initially in the guide rails until the first and second stop devices engage slide downward from one another and then pivot around the first stop device, characterized in that each of the first two stop devices (38) each has at least one extension (41) projecting in the path of movement of the associated second stop device (42) and each of the the two second stop devices (42) are each formed by at least two extensions (43), the spacing of which is dimensioned such that the extension (41) of the first stop device (38) fits in between. 2. Awning according to claim 1, characterized in that the extensions (41) of the first stop device (38) of teeth of a rack section (38) running parallel to the respective guide rail (5, 6) and the extensions (43) of the second Stop device are formed by the teeth (43) of a gear segment (42) whose center lies coaxially with the swivel axis (32) of the associated drop arm (8, 9). 3. Awning according to claim 2, characterized in that the two rack portions (38) are fastened at a height such that their uppermost opposing tooth (41) is located at ²⁰ at the point at which the vertical movement of the failure of arms (8.9) changes into the pivoting movement. 4. Awning according to claim 2, characterized in ²⁵ that the length of the two rack portions (38) is dimensioned such that the furthest down gear (4.1) is at an altitude at which the pivoted by approximately 180 ° from the starting position failure arms (8,9) with their 30 _Z ahnradsegmenten (42) coming from the rack sections (38) is disengaged. 5. Awning according to claim 1, characterized in that a cam (44) is arranged below the first stop device (38), which cooperates with a cam track (45) on the underside of the associated extension arm (8,9), such that when The essentially vertically downward-extending drop arm (8, 9) slides up and, when it comes into engagement with the first stop device (38), is pivoted by a predetermined angle in the direction of the rest position. 6. Awning according to claims 2 and 5, characterized in that the cam (44) and the rack section (38) are arranged on a common base plate (39). 7. Awning according to claim 5, characterized in that the first and the second stop device (38, 43) and optionally the cam (44) are in the guide rail (5, 6) formed as a longitudinally slotted hollow profile. 8. An awning according to claim 7, characterized _'in that the first stop means (38) and optionally the cam (44) in a wall of the building (adjacent and in the direction of the respective extension arm (8,9) longitudinally slit to open chamber ( 23) of the guide rail (5,6) sit and that the chamber (23) extends over the entire length of the guide rail (5,6). 9. Awning according to claim 1, characterized in that each of the extension arms (8,9) in an associated Guide carriage (24) is rotatably mounted, which is guided in a longitudinally displaceable manner in the associated guide rail (5, 6). 10. Awning according to claim 9, characterized in that on the two guide carriages (24) a parallel to the winding shaft, rotatably mounted deflection roller (12) is held, the distance from the pivot point (32) of the extension arms (8,9) in the two guide carriages (24) is greater than the distance of the pivot points (32) from the drop rail (11). 11. Awning according to claim 9, characterized in that each of the guide carriages (24) includes two mutually parallel, frame-forming U-rails (25, 26) which face each other with their base (28, 29) in a predetermined manner Are connected at a distance and carry at their upper and at their lower end guide rollers (31) with which they run along in the guide rails (5, 6), and that the respective extension arm (8, 9) is mounted between the profile rails (25, 26) is. 12. Marki-se according to claim 1, characterized in that at least one extension arm (8,9) from the vertically upward position in the direction of the vertically downward position is spring-biased relative to its own pivot point. 13. Awning according to claim 12, characterized in that both extension arms (8,9) are biased. 14. Awning according to claim 12, characterized in that coil springs (33) are provided for pretensioning, which act at one end on a pivot pin (32) connected in a rotationally fixed manner to the extension arm (8, 9). 15. Awning according to claim 14, characterized in that the coil springs (33) are supported at the other end in the guide rail (5, 6). 16. Awning according to claim 14, characterized in that the coil springs (33) are supported at the other end in the respective guide carriage (24).

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