DE102015004859A1 - shutters - Google Patents

Abstract

The invention relates to a roller shutter with a roller shutter (10), one about a rotation axis (6) driven winding shaft (4) for winding and unwinding of the roller shutter (10), a roller shutter box (3) for receiving the winding shaft (4) and of it rolled-up roller shutter (10), and side guides for guiding the side edges of the roller shutter (10) outside of the roller shutter box (3). In order to be able to slide out such a roller shutter over long distances without interference, it is proposed according to the invention that the roller shutter box (3) in the region of its front ends each have an inwardly pointing in a solder plane to the axis of rotation (6) helically extending guide groove (14) and in that along the side edges of the roller shutter armor (10) are provided first sliding or rolling elements (19) which engage in the helical guide groove (14) and are slidably supported on the sides of the helical guide groove (14).

Description

The invention relates to a roller shutter with a roller shutter, a winding shaft and a roller shutter box according to the preamble of patent claim 1.

Roller shutters such as roller shutters are known in various applications and serve mainly the partial or complete closing of building openings such as windows, doors and gates, or the covering of building surfaces such as glass facades for the purpose of viewing or sun protection.

As a rule, have such Rollabschlüsse a rollable on a winding shaft roller shutter, which is formed by hingedly interconnected slats and which is arranged above the building opening in the rolled up state within a roller shutter box. By rotation of the winding shaft of the roller shutter is unrolled, with its lateral edges are held displaceably in side guides. The downward weight of the roller shutter armor supports the smooth up and down movement. Such a shutter is, for example, in the DE 20 2011 102 653 U1 described.

In addition to a hanging arrangement of the roller shutter, in which the building opening is closed from top to bottom, there is also the need in practice to be able to close a building opening in the opposite direction from bottom to top, for example, if in the lower area a privacy should be achieved while the upper area should be used for sufficient light. Here, however, the weight of the roller shutter counteracts its rolling motion, which makes easy operation of the shutter without further aids such as drawstrings difficult if not impossible. The same applies to roll closures that close horizontally from one side to the other a building opening, such as a garage door. Their up or rolling movement is not supported by the weight of the roller shutter.

Against this background, the invention has the object to further develop known shutters such that they are also able to close a building opening or building surface in the vertical direction from bottom to top or in the horizontal direction from one side to another.

This object is achieved by a roller shutter with the features of claim 1.

Advantageous embodiments will be apparent from the dependent claims.

The invention is based on the finding that a roller shutter when pushing out of a roller shutter box from the bottom up due to its downward weight on the one hand and the opposing Ausschubkraft on the other hand is exposed to considerable compressive forces. In the wound portion of the roller shutter these pressure forces generate outward radial forces that counteract a compact winding of the roller shutter on the winding shaft. To counteract a consequent obstruction of the rolling process, a guide of the side edges of the roller shutter is provided within a spirally extending guide groove according to the invention in the wound portion of the roller shutter. Especially with larger shutters, however, this means that the radially outward forces greatly increase the contact pressure of the roller shutter against the sides of the guide, with the result that considerable frictional forces between the guide and roller shutter. At best, this can be counteracted by stronger drives that overcome the frictional force; in the worst case, however, the frictional forces cause blocking of the ejection movement or cause damage to the roller shutter.

To remedy this situation, according to the invention first sliding or rolling elements are provided along the side edges of the roller shutter armor, which engage in the guide groove and there are slidably or rollingly supported on the groove sides. In this way, counteract the radially outward forces, but at the same time allows movement of the roller shutter along the guide groove. This is the first time that it has been possible to reliably and safely remove even large-surface roller shutter shells from a roller shutter box.

Preferably, the helical guide groove is arranged as an integral part of the end wall of the roller shutter box on the inside, for example by a spiral-shaped web is formed on the end wall, which defines the individual turns of the guide groove. This allows a compact structure of the roller shutter, which can turn out in view of the usually tight space at the installation as a decisive advantage. The end walls can be designed as removable parts, which allows their economic production as injection-molded plastic part.

The length of the helically extending guide has a significant effect on the forces required to push out the roller shutter. Thanks to the invention can now longer Guide grooves may be provided, for example, with at least four turns, preferably with at least six turns, which allows the inclusion of larger roller shutter in the shutter box, without exceeding the maximum allowable forces when pushing out the roller shutter.

In order to achieve the most flush and thus barrier-free transition of the roller shutter from the winding shaft to the guide and / or from the guide to the guide rails, a preferred embodiment of the invention provides that the inner turn of the guide connects directly to the winding shaft and / or the outer turn opens into the longitudinal groove of the side guide. It is advantageous if the end portion of the guide tangentially emerges from the end wall to avoid blunt shocks with the side guides in the curved area, which could possibly be the cause of impurities.

In a first implementation of the invention, the movement of the roller shutter is facilitated by the arrangement of rolling elements whose axis of rotation is parallel to the winding axis, so that the running direction of the rolling elements coincides with the rolling direction of the roller shutter. The rolling elements may have rollers, balls, rollers and the like, which are arranged either on stub axles outside the roller shutter, which has the advantage that they can engage relatively deep in the guide and the roller shutter not or only slightly in a narrow region of the side edges comes in contact with the guide groove; or the rolling elements are protected within the roller shutter.

As an alternative to or in combination with the rolling elements, a low-resistance movement of the roller shutter can also be facilitated by means of sliding elements, which have a material with a low coefficient of friction at least at their contact surface with the guide groove, for example polytetrafluoroethylene, or consist entirely of such a material. It is also conceivable that the sliding elements consist of a material doped with lubricant. Preferably, in these cases, the guide groove forming surfaces made of a corresponding material.

The lateral distance of the sliding or rolling elements with each other should not be too large to ensure a quasi-continuous guidance of the side edges in areas of the guide groove with large curvature. On the other hand, a small distance proves to be uneconomical due to the resulting number of sliding or rolling elements. In the course of the invention it has been found that with a maximum lateral distance of 10 cm, preferably a maximum of 6 cm sufficient guidance of the roller shutter is guaranteed.

For transmitting the driving force from the winding shaft to the roller shutter, a rod-shaped carrier is provided according to a preferred embodiment of the invention, due to its telescopic training compensates for an adaptation to radial distance changes between winding shaft and roller shutter in the course of unwinding or reeling. In order to minimize the risk of tilting of the telescopic parts, the invention is provided in an advantageous development of limiting the insertion depth of the individual parts by providing a stop and / or bias the parts by means of a spring element against each other, so that the driver automatically an extended position occupies.

According to a further embodiment of the invention additional second sliding or rolling elements are provided on at least one side edge of the roller shutter, which protrude with a part of its peripheral portion on the side edge of the roller shutter. The axis of the rolling elements is substantially perpendicular to the plane of the roller shutter. The second sliding or rolling elements are thus able to support the roller shutter in its plane perpendicular to its rolling motion, which comes in particular in applications such as side doors to fruition.

The invention is explained in more detail below with reference to an embodiment shown in the drawing, wherein further features and advantages of the invention will become apparent. As far as possible identical references are used for the same or functionally identical features of different embodiments.

It shows

1 an oblique view of a first embodiment of a roller shutter according to the invention with vertically extendable roller shutter,

2 an oblique view of a second embodiment of a roller shutter according to the invention with lying horizontally pushed out roller shutter shell,

3 an oblique view of a third embodiment of a roller shutter according to the invention with a standing, horizontally ausschiebbarem roller shutter armor,

4 a horizontal section through the end of the in 1 shown shutters along the in 5 shown line IV-IV,

5 a cross section through the in 4 shown shutters along the local line VV,

6 a plan view of the end portion of the roller shutter of the in 1 shown shutter,

7 a side view on the in 6 shown roller shutters,

8th a cross section through which the winding shaft of in 4 shown roller shutter along the line there VIII-VIII,

9 a longitudinal section through a portion of the in 8th shown winding shaft along the local line IX-IX,

10 a vertical section through the end portion of a roller shutter according to the invention along the in 11 shown line XX according to a second embodiment of the invention,

11 a horizontal section through the in 10 shown shutters along the local line XI-XI,

12 a plan view of the end portion of a roller shutter of the in 10 shown shutter, and

13 a side view on the in 12 Shutters shown.

The 1 . 2 and 3 show a roller shutter according to the invention 1 in different applications. In 1 serves the roller shutter 1 for vertically closing a vertical opening, in 2 for horizontal closing of a horizontal opening and in 3 for horizontal closing of a vertical opening. In all cases described includes the shutter 1 a hollow cylindrical, on one longitudinal side having an opening roller shutter box 3 to accommodate one especially in the 4 . 5 . 10 and 11 Winding shaft shown in detail 4 , The rotation axis 6 the winding shaft 4 runs axially parallel to the longitudinal axis of the roller shutter box 3 , In the axial direction is the shutter box 3 from end walls 5 locked.

At the ends of the shutter box 3 in the area of the end walls 5 you can see two mutually parallel guide rails 7 located in the plane of the apertured longitudinal side of the shutter box 3 run and with one end in the shutter box 2 lead. To form side guides own the guide rails 7 on the mutually facing sides in each case a longitudinal groove. As a rule, the roller shutter box run 3 and the guide rails 7 along the edges of a building opening, not shown.

The shutter 1 further comprises a flat, due to its vielgliedrigen training bendable roller shutter 10 that is between the guide rails 7 extends. As the 6 and 7 will show in the present embodiment, the roller shutter 10 from a large number of axially parallel slats 11 formed, which are hinged together along their adjacent longitudinal edges. Preferably, these are roll-formed or extruded aluminum profiles. The lateral ends of the individual slats 11 together form the side edges of the roller shutter shell 10 in the longitudinal grooves of the guide rails 7 are held linearly displaceable.

The shutter box 3 associated end of the roller shutter 10 is non-positive with the winding shaft 4 connected, so that during a rotation of the winding shaft 4 the roller shutter tank 10 depending on the direction of rotation on the winding shaft 4 is rolled up or down. In the 1 and 2 is with the arrows 12 for example, the direction of rotation of the winding shaft 4 indicated, with the rolling of the roller shutter 10 is effected and the to a removal or insertion movement of the roller shutter 4 in the direction of the arrows 13 leads and thus to a closing of a building opening.

To allow such a Ausschubbewegung has the shutter box according to the invention 3 on his end walls 5 one each with respect to the axis of rotation 6 spiral-shaped guide groove 14 on whose open side is directed inwards and - analogous to the guide rails 7 - For slidably receiving one side edge of the roller shutter shell 10 serves. As the 4 and 5 show in the present embodiment, the end walls 5 of detachable end caps 18 formed on the shutter box 3 are attached and at the same time the pivot bearing for the winding shaft 4 accommodate. On the inside of the end cover 18 is a spiraling bridge 15 Molded on the sides of the guide groove 14 defined, while the reason of the guide groove 14 from the end cap 18 is formed.

The geometric course of the spiral guide groove 14 is such that the inner first turn 16 flush with the circumference of the winding shaft 4 connects and the outer last turn 17 flush with the longitudinal groove of the guide rail 7 , In this case, the last section of the guide groove 14 tangentially from the front wall 5 kick and align in the guide rail 7 pass. In a rolling movement of the winding shaft 4 relative to the spiral guide groove 14 becomes the roller shutter armor 10 first in the guide groove 14 and subsequently in the lateral guide rails 7 pushed in, where it is held with its side edges.

To a low-resistance movement of the roller shutter 10 in the spiral guide groove 14 to achieve in the present embodiment, along the longitudinal edges of the roller shutter 10 rolling elements 19 arranged, each with a journal 20 and a roll rotatably seated thereon 21 have. Each journal 20 is with its one end with axis-parallel alignment to the axis of rotation 6 non-positively in the roller shutter armor 10 anchored and forms with its opposite end a projection on which the roll 21 is freely rotatable via a sliding or roller bearing. Here is the diameter of the roll 21 slightly larger than the thickness of the roller shutter 10 , The lateral distance between two adjacent rollers 21 is preferably at most 10 cm, most preferably at most 7 cm, and in the present embodiment, a maximum of 5 cm. In one of slats 11 formed roller shutter 10 , the rolling elements can 19 For example, in each case in the joint region of two slats 11 be arranged, thereby having only one roll 21 two slats 11 be supported.

The with such rolling elements 19 equipped area of the roller shutter 10 can extend over the entire length of the roller shutter 10 extend, but at least over the portion of the side edges, directly to the winding shaft 4 followed. Depending on the material and size of the roller shutter 10 It may already be enough if the rolling elements 19 are arranged over the inner first third or the inner first half of the side edges.

When ready for use, the roller shutter shell engages 10 along its two side edges with the rollers 21 in the spiral guide groove 14 and longitudinal grooves of the guide rails 7 one. There is a possibility that the slats 11 of the roller shutter 10 in front of the spiral guide groove 14 and the longitudinal groove of the guide rails 7 end, so do not engage in the grooves, or axially overlap with the grooves, so with its edge and together with the rolling elements 19 intervene in the grooves. When rolling or rolling in the roller shutter shell 10 the roles are based 21 on the sides of the guide groove 14 and guide rails 7 off, so the roles 21 the movement of the roller shutter 10 Minimize opposing resistance.

The drive of the roller shutter 10 takes place via the already mentioned winding shaft 4 , which is formed in the present embodiment substantially of a hollow cylindrical aluminum tube with octagonal cross-section. The two ends of the winding shaft 4 are in rolling bearings 9 on the end walls 5 or end caps 18 rotatably mounted. The winding shaft 4 is at one end of a drive in the form of an external rotor electric motor 22 set in rotation, whose internal stator 23 in the longitudinal axis 6 the winding shaft 4 rotatably with the front wall 5 or end cover 18 is connected and the outboard runner stationary on the inner circumference of the winding shaft 4 is arranged.

For power transmission to the roller shutter armor 10 is in the winding shaft 4 a radially extending, rigid and adjustable in length driver 25 anchored, with its free end to the surface of the roller shutter 10 is articulated. The driver 25 consists of a telekopierbaren rod with three push elements 25 ' . 25 '' . 25 ''' , The maximum insertion depth of a push element 25 '' . 25 ''' smaller diameter in a thrust element 25 ' . 25 '' larger diameter can thereby by a on the inner circumference of the thrust element 25 ' . 25 '' Be arranged larger diameter stop limited, for example, by a circumferential collar or a radially extending web. Likewise, the pushers 25 ' . 25 '' . 25 ''' through an inside of the driver 25 arranged biased spring element to be biased, so that the driver 25 always with light pressure on the roller shutter 10 is applied. The telescopic design of the driver 25 is capable of unwinding and unwinding in the inner end region of the roller shutter 10 occurring radial distance changes to the winding shaft 4 automatically compensate, without affecting the adhesion.

In addition, a stabilizer can be used to improve the roller shutter run 26 between winding shaft 4 and roller shutter 10 be arranged. The embodiment according to 5 shows a stabilizer 26 in the form of a springy steel strip, which in 1 additionally shown as a separate part. The stabilizer 26 is with its one longitudinal section with axis-parallel alignment rigidly on the outer circumference of the winding shaft 4 attached, while the other longitudinal section a slot 27 having a linear guide for a fixed to the roller shutter 10 sitting head bolt 28 forms, in order to adaptability to the above-mentioned changes in distance between the winding shaft 4 and roller shutter 10 in the course of unwinding and unrolling.

The 10 to 13 show an evolution of the among the 4 to 9 described embodiment, especially for Use cases is appropriate, as in 3 are shown, so for shutters 1 in which the guide rails 7 horizontally and the roller shutter 10 is arranged standing. To the rolling behavior of the roller shutter 1 to improve are in the range of the lower side edge or both side edges of the roller shutter 10 second rolling elements 30 arranged. The second rolling elements 30 have an axis 31 perpendicular to the plane of the roller shutter 10 runs and for the rotatable storage of a roll 32 serves. Here is the relative position of the axis 31 to the lateral edge of the roller shutter 10 such that the roles 32 with a part of its circumference over the side edge and with the supernatant at the bottom of the spiral guide groove 14 and longitudinal groove of the guide rails 7 roll. Especially from 13 it can be seen in the present embodiment, the fins 11 made of an extruded double-walled hollow section, so that the axle 31 stored in the two lamellar walls and the role 32 sitting between the lamellar walls. Preferably, the second rolling elements 30 centrally on the front side of a lamella 11 arranged, resulting in a changing sequence of first rolling elements 19 and second rolling elements 30 results.

The invention is not limited to the embodiments described above, but also includes embodiments that are based on the spirit and purpose of the claims. For example, the invention also includes shutters in which the sliding or rolling elements are arranged on the spirally extending guide groove and / or on the longitudinal groove of the side guides to support the roller shutter during rolling or rolling on the winding shaft.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202011102653 U1 [0003]

Claims (12)

Roller shutter with - a roller shutter ( 10 ), - one around a rotation axis ( 6 ) drivable winding shaft ( 4 ) for winding and unwinding the roller shutter ( 10 ), - a roller shutter box ( 3 ) for receiving the winding shaft ( 4 ) and of the roller shutter shell rolled up thereon ( 10 ), and - side guides for guiding the side edges of the roller shutter shell ( 10 ) outside the roller shutter box ( 3 ), characterized in that - the shutter box ( 3 ) in the region of its front ends in each case an inwardly facing in a solder plane to the axis of rotation ( 6 ) spirally extending guide groove ( 14 ), - that along the side edges of the roller shutter ( 10 ) first sliding or rolling elements ( 19 ) are provided, - in the spirally extending guide groove ( 14 ) and - sliding or rolling on the sides of the helically extending guide groove ( 14 ). Roller shutter according to claim 1, characterized in that the shutter box ( 3 ) frontally in each case by an end wall ( 5 ) is closed and the spiral-shaped guide groove ( 14 ) each on the inside of an end wall ( 5 ) is arranged. Roller shutter according to claim 1 or 2, characterized in that the helically extending guide groove ( 14 ) with its first inner turn ( 16 ) to the winding shaft ( 4 ) and / or that the spirally extending guide groove ( 14 ) with its last outer turn ( 17 ) in the side guide outside the roller shutter box ( 3 ) and / or Roller shutter according to one of claims 1 to 3, characterized in that the first rolling elements ( 19 ) Roll ( 21 ), Balls or rollers, each about an axis ( 20 ) are mounted rotatably parallel to the axis of rotation ( 6 ) runs. Roller shutter according to one of claims 1 to 4, characterized in that the first sliding or rolling elements ( 19 ) in the direction of the axis of rotation ( 6 ) over the side edges of the roller shutter ( 10 ) survive. Roller shutter according to one of claims 1 to 5, characterized in that the roller shutter ( 10 ) of a plurality of hingedly connected lamellae ( 11 ) and each end of a lamella ( 11 ) of the roller shutter ( 10 ) a first sliding or rolling elements ( 19 ) assigned. Roller shutter according to one of claims 1 to 6, characterized in that the winding shaft ( 4 ) at least one with the winding shaft ( 4 ) rotatably connected driver ( 25 ), the non-positively to the roller shutter ( 10 ) is articulated. Roller shutter according to claim 7, characterized in that the driver ( 25 ) of rod-shaped sections ( 25 ' . 25 '' . 25 ''' ) is formed, which are telescopically arranged one inside the other. Roller shutter according to claim 8, characterized in that at least one section ( 25 ' . 25 '' . 25 ''' ) a stop to limit the insertion depth of another section ( 25 ' . 25 '' . 25 ''' ) and / or that within the rod-shaped sections ( 25 ' . 25 '' . 25 ''' ) A prestressed spring is arranged. Roller shutter according to one of claims 1 to 9, characterized in that along the side edges of the roller shutter ( 10 ) second sliding or rolling elements ( 30 ) are provided, which are rolling or sliding at the bottom of the helically extending guide groove ( 14 ). Roller shutter according to claim 9, characterized in that the second rolling elements ( 30 ) from rolls ( 32 ), Balls or rollers, each about a bearing axis ( 31 ) are rotatably mounted, perpendicular to the axis of rotation ( 6 ) and perpendicular to the guide groove ( 14 ) runs. Roller shutter according to claim 10 or 11, characterized in that the roller shutter armor ( 10 ) made of lamellas ( 11 ) and each end of a lamella ( 11 ) of the roller shutter ( 10 ) a second sliding or rolling element ( 30 ) assigned.

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