Roller screen

Description

[0001] The invention relates to a roller screen, in particular a roller screen door, comprising screen material, a roll-up mechanism for said screen material, a housing in which said roll-up mechanism is mounted, a pull bar, to which the end of the screen material projecting from the housing is attached, and two lateral guides for guiding said screen material and the ends of said pull bar, wherein a guide pin is mounted in a channel of each lateral guide, on which guide pin said screen material is guided, and wherein a locking mechanism is provided which locks said pull bar in an end position.

[0002] A roller screen of this kind is for example disclosed in NL-A-1 000 095. With said known roller screen, a magnetic fastener, which is to be mounted in part on the casing, may be used as the locking mechanism. The use of such a locking mechanism has drawbacks, such as the fact that separate parts must be mounted on the casing.

[0003] EP-A-0 579 335 discloses a roller screen wherein a locking finger is mounted in one end of the lateral guides in order to function as a locking mechanism, which locking finger mates with a cam of the pull bar which projects into said lateral guide. The advantage of said locking mechanism is the fact that precise mounting is ensured under all circumstances, wherein no separate parts need to be mounted. A drawback of said known roller screen is the fact that it is not possible to use guide pins for the screen material with this roller screen.

[0004] The object of the invention is to provide an improved roller screen of the kind referred to above.

[0005] In order to accomplish that objective, the roller screen according to the invention is characterized in that each lateral guide is provided, at least at its end facing away from the housing, with a second channel extending beside said first channel, wherein an end piece comprising a first locking element which projects into said second channel is mounted in said end of each lateral guide, wherein the pull bar comprises a second locking element at its ends, which second locking element mates with the first locking element in the end position for the purpose of locking the pull bar in said end position.

[0006] In this way a roller screen is obtained which makes it possible on the one hand to guide the screen material on guide pins in the lateral guides, and on the other hand to use a locking mechanism which is accommodated in said lateral guides.

[0007] Preferably, each second locking element is in the form of a locking pin, which projects from the respective end of the pull bar into the second channel, and which can be retracted against spring force, wherein each first locking element is in the form of a retaining opening for receiving a locking pin, wherein said pull bar carries an operating mechanism for retracting the locking pins.

[0008] According to a very advantageous embodiment of the roller screen according to the invention, each lateral guide is provided with said second channel along its entire length, wherein a third locking element comprising a retaining opening is provided in said second channel for locking the pull bar in an intermediate position.

[0009] Such an embodiment including an intermediate position is in particular suitable for use in sliding doors and the like, so that the sliding door can be placed in one or more partially open positions, whilst the opening can nevertheless be closed by the roller screen door.

[0010] The invention will be explained in more detail hereafter with reference to the drawing, which shows an embodiment of a roller screen according to the invention in the form of a roller screen door.

Fig. 1 is a perspective view of a sliding French window, which comprises two roller screen doors according to the invention.

Fig. 2 shows the end of a lateral guide with an end piece in a longitudinal sectional view through the first channel.

Fig. 3 shows the end of the lateral guide of Fig. 2 in a longitudinal sectional view through the second channel.

Fig. 4 is a cross-sectional view of the lateral guide according to detail IV of Fig. 1.

Fig. 5 is a perspective view of an end piece.

Fig. 6 is a perspective view of the third locking element.

Fig. 7 is a longitudinal sectional view of the locking element of Fig. 6.

[0011] Fig. 1 is a perspective view of a sliding French window 1, which is capable of releasing a door opening 2. Two roller screen doors 3 are mounted on said sliding French window, which roller screen doors comprise screen material 4 and a roll-up mechanism for the screen material, which is known per se and which is not shown in the drawing. Said roll-up mechanism is mounted in a housing 5, with a pull bar 6 being attached to the end of the screen material 4 that projects from housing 5. Lateral guides 7 and 8 for guiding the screen material 4 and the ends 9 of pull bar 6 are mounted on the upper side and the lower side of door opening 2.

[0012] With the illustrated roller screen doors 3, each lateral guide 7, 8 is provided with a first channel 10, in which a guide pin 11 is mounted, on which the screen material 4 is guided, as is shown in Figs. 2 and 3. Guide pin 11 is provided at its end with a head part 12, which is retained with some play by a mounting element 13, which forms part of an end piece 14 which is mounted in the ends of lateral guides 7, 8. End piece 14 is shown in perspective view in Fig. 5. Mounting element 13 is described in more detail in NL-A-1 000 095. For a more detailed explanation, reference may be had to said publication.

[0013] Each lateral guide 7, 8 is furthermore provided over its entire length with a second channel 15, with a first locking element 16 projecting into said second channel 15, as is shown in Fig. 4. Said locking element 16 comprises a retaining opening 17, which is capable of co-operation with an associated locking pin 18, which projects from the respective end of pull bar 6. Said locking pin 18 can be retracted into the pull bar against the action of a spring (not shown). Locking element 16 is furthermore provided with a ramp 19, which guides locking pin 18 towards retaining opening 17 when pull bar 6 is being moved to its end position as shown in Figs. 1 and 3, that is, it urges locking pin 18 upwards against the action of the spring, so that locking pin 18 will be pressed into retaining opening 17 when said end position is reached. Pull bar 6 is then locked in its end position. Pull bar 6 carries an operating mechanism 20 (not shown in detail), by means of which the locking pins 18 can be retracted for releasing said locking pins 18 from retaining openings 17. The roller screen door can then be opened, whereby the roll-up mechanism retracts the screen material 4 into housing 5.

[0014] The advantage of the roller screen door 3 as described is that it enables a very satisfactory guiding of the screen material 4 by means of guide pins 11, whilst furthermore a reliable locking of pull bar 6 in the end position is possible. It is not necessary to mount separate parts or the like on casings or the like for fitting the locking mechanism.

[0015] It is noted that end piece 14 is retained in the end of lateral guide 7, 8 by means of a snap lip 21 comprising a cam 22 which projects into a retaining opening 23 in lateral guide 7, 8. An outlet 24 is provided in end piece 14, which outlet is located under mounting element 13 and which connects to first channel 10. Via said outlet 24, dirt and water can be discharged from said first channel 10.

[0016] A brush 26, which consists of a brush holder 27 comprising a passage 28 for guide pin 11, is mounted on an end cap 25 of pull bar 6 for the purpose of keeping first channel 10 clear of dirt. In the embodiment described herein, brush holder 27 carries three brush hair groups 29, which extend diagonally with respect to the slightly rectangular brush holder, so that first channel 10 is kept clear of dirt over its entire width. The brush hairs brush lightly over the bottom 30 of channel 10. Brush 26 is connected to end cap 25 of pull bar 6 by means of springing snap fingers 31.

[0017] The advantage of the embodiment of the locking mechanism of roller screen 3 as described herein is that one or more third locking elements 32 can be fitted in the second channel 15 of each lateral guide 7, 8 for the purpose of defining an intermediate position. In the illustrated embodiment, said locking element is present at the location of lateral guide 7 which is indicated at IV. In Figs. 6 and 7, third locking element 32 is shown in detail, in perspective view and in longitudinal sectional view respectively.

[0018] As is apparent from said figures, said locking element 32 is a rectangular central block 33, which is provided with a retaining opening 34 which is capable of co-operation with the associated locking pin 18, in the same manner as retaining opening 17, for the purpose of locking pull bar 6 in the intermediate position. Central block 33 carries three wings 35, 36 and 37 on either side thereof, which wings extend in the longitudinal direction of channel 15. The first two wings 35, 36 adjoin the lateral surfaces of block 35 that butt against the inner walls of channel 15. Said wings 35, 36 are clamped against the inner walls of channel 15 in that third wing 37 is forced between the two wings 35, 36, in the manner shown in Fig. 7. As a result of this, locking element 32 is held in the desired position in lateral guide 7, 8. Wings 35, 36 are provided with cams 38 on their facing sides, which cams retain wing 37. Wing 37 adjoins the upper surface 39 of block 33 and is pivotally connected to block 33 at the location of said upper surface 39. Wing 37 provides ramps, which guide locking pin 18 towards retaining opening 34 in the same manner as ramp 19. Wings 35, 36 are provided with a protrusion at their upper ends for clamping down locking element 32 in channel 15 of lateral guide 7, 8 more adequately.

[0019] It is noted that locking element 32, and also end piece 14, may be made of plastic material.

[0020] The use of locking elements 32 makes it possible to place sliding door 1 in a desired, partially open position, and lock pull bar 6 in said intermediate position of roller screen door 3.

[0021] Another advantage of the above-described roller screen door 3 is the fact that it is possible, in the case of a sliding French window of large dimensions, to use two roller screen doors with common lateral guides 7, 8, if desired, whereby a locking element 32 provided with two retaining openings 34 is mounted at a desired location, usually in the middle. As a result of this, it is also possible to use roller screen doors for closing the door opening of a sliding French window which has a large door opening to be released, which would not be possible when using one roller screen door, in view of the required length of the screen material 4.

[0022] It is noted that the screen material is shown to engage round guide pin 11 with a hem in the drawing. It is preferred, however, to use a hem which is made of a plastic material having a very low coefficient of friction. In practice, satisfactory results have been obtained with a 100% nylon material having a so-called integrated tear stop structure, which is coloured with a polyurethane coating.

[0023] The invention is not limited to the above-described embodiment as described above, which can be varied in various ways within the scope of the claims.

Claims

1. A roller screen, in particular a roller screen door, comprising screen material, a roll-up mechanism for said screen material, a housing (5) in which said roll-up mechanism is mounted, a pull bar (6), to which the end of the screen material projecting from the housing is attached, and two lateral guides (7,8) for guiding said screen material and the ends of said pull bar, wherein a guide pin (11) is mounted in a channel (10) of each lateral guide, on which guide pin said screen material is guided, and wherein a locking mechanism is provided which locks said pull bar in an end position, characterized in that each lateral guide is provided, at least at its end facing away from the housing, with a second channel (15) extending beside said first channel, wherein an end piece (14) comprising a first locking element (16) which projects into said second channel is mounted in said end of each lateral guide, wherein the pull bar comprises a second locking element (18) at its ends, which second locking element mates with the first locking element in the end position for the purpose of locking the pull bar in said end position.

2. A roller screen according to claim 1, wherein each second locking element (18) is in the form of a locking pin, which projects from the respective end of the pull bar into the second channel (15), and which can be retracted against spring force, wherein each first locking element (16) is in the form of a retaining opening (17) for receiving a locking pin, wherein said pull bar (6) carries an operating mechanism (20) for retracting the locking pins.

3. A roller screen according to claim 2, wherein each end piece comprises a ramp (19), which guides said locking pin (18) towards said retaining opening (17) when the pull bar (6) is being moved to its end position.

4. A roller screen according to claim 2 or 3, wherein each lateral guide (7,8) is provided with said second channel (15) along its entire length, wherein a third locking element (32) comprising a retaining opening (34) is provided in said second channel for locking the pull bar (6) in an intermediate position.

5. A roller screen according to claim 4, wherein said third locking element (32) is provided with a ramp on either side of said retaining opening, which ramps guide the locking pin towards the retaining opening (34) when the pull bar (6) is being moved to the intermediate position.

6. A roller screen according to claim 5, wherein each third locking element (32) is a rectangular central block (33), in an upper surface (39) of which the retaining opening (34) is provided, and which carries three wings (35,36,37) on either side thereof, which wings extend in the longitudinal direction of said second channel (15), wherein a first and a second wing (35,36) adjoin surfaces of said block that butt against the inner walls of said channel, and wherein said first and said second wing are clamped against the inner walls of said channel for fixing the third locking element in position in said channel, and wherein said third wing (37) adjoins the upper surface of said block, wherein it is clamped between the two aforesaid wings and wherein it provides said ramps.

7. A roller screen according to claim 6, wherein said third wing (37) is pivotally connected to said central block.

8. A roller screen according to claim 6 or 7, wherein the first two wings (35,36) are provided on their facing sides with a cam (38) for retaining said third wing (37), wherein the first two wings preferably have a protrusion on the opposite sides.

9. A roller screen according to any one of the preceding claims, wherein said pull bar (6) is provided, at least at its bottom end, with a brush (26) which projects into said first channel (10), and which is preferably in contact with the bottom of said channel.

10. A roller screen according to claim 9, wherein said brush is provided with a brush holder (27) comprising a passage for said guide pin (11).

11. A roller screen according to claim 9 or 10, wherein said brush (26) is connected to said pull bar (6) by means of a snap connection (31).

12. A roller screen according to any one of the preceding claims, wherein an outlet (24) is formed in said end piece (14), which outlet connects to said first channel (10).

13. A roller screen according to any one of the preceding claims, wherein each end piece (14) carries a mounting element projecting into said first channel for receiving the end of a guide pin (11).

14. A roller screen according to any one of the preceding claims, wherein said screen material is provided with hems, by means of which said screen material is guided on said guide pins (11), wherein each hem is made of a plastic material having a very low coefficient of friction.

15. A roller screen according to any one of the claims 4-14, wherein said third locking element (32) is provided with two retaining openings (34).

16. A roller screen assembly comprising two roller screens according to claim 15, wherein said roller screens have common lateral guides (7,8).

Ansprüche

1. Rouleau, insbesondere Rouleautür, aufweisend:

Gewebematerial, einen Aufroll-Mechanismus für das Gewebematerial, ein Gehäuse (5), in welches der Aufroll-Mechanismus montiert ist, eine Zugstange (6), an welcher das aus dem Gehäuse vorstehende Ende des Gewebematerials angebracht ist, und zwei Seitenführungen (7, 8) zum Führen des Gewebematerials und der Enden der Zugstange, wobei in einen Kanal (10) jeder Seitenführung ein Führungsbolzen (11) montiert ist, an welchem Führungsbolzen das Gewebematerial geführt ist, und wobei ein Verriegelungsmechanismus vorgesehenen ist, welcher die Zugstange in einer Endposition verriegelt, dadurch gekennzeichnet, dass jede Seitenführung zumindest an ihrem vom Gehäuse weg weisenden Ende mit einem zweiten Kanal (15) versehen ist, der sich neben dem ersten Kanal erstreckt, wobei in das Ende jeder Seitenführung ein Endstück (14) montiert ist, das ein erstes Verriegelungselement (16) aufweist, welches in den zweiten Kanal hinein vorsteht, wobei die Zugstange an ihren Enden ein zweites Verriegelungselement (18) aufweist, welches zweite Verriegelungselement in der Endposition mit dem ersten Verriegelungselement in Eingriff ist zum Zwecke des Verriegelns der Zugstange in der Endposition.

2. Rouleau gemäß Anspruch 1, wobei das jeweilige zweite Verriegelungselement (18) die Form eines Verriegelungsbolzens aufweist, welcher vom jeweiligen Ende der Zugstange her in den zweiten Kanal (15) hinein vorsteht und welcher gegen eine Federkraft zurückgezogen werden kann, wobei das jeweilige erste Verriegelungselement (16) die Form einer Halteöffnung (17) zum Aufnehmen eines Verriegelungsbolzens aufweist, und wobei die Zugstange (6) einen Betätigungsmechanismus (20) zum Zurückziehen der Verriegelungsbolzen aufweist.

3. Rouleau gemäß Anspruch 2, wobei jedes Endstück eine Schräge (19) aufweist, welche den Verriegelungsbolzen (18) in Richtung zur Halteöffnung (17) führt, wenn die Zugstange (6) zu ihrer Endposition bewegt wird.

4. Rouleau gemäß Anspruch 2 oder 3, wobei jede Seitenführung (7, 8) entlang ihrer gesamten Länge mit dem zweiten Kanal (15) versehen ist, wobei ein drittes Verriegelungselement (32), das eine Halteöffnung (34) aufweist, im zweiten Kanal vorgesehen ist zum Verriegeln der Zugstange (6) in einer Zwischenposition.

5. Rouleau gemäß Anspruch 4, wobei das dritte Verriegelungselement (32) an beiden Seiten der Halteöffnung mit einer Schräge versehen ist, welche Schrägen den Verriegelungsbolzen in Richtung zur Halteöffnung (34) führen, wenn die Zugstange (6) zu ihrer Zwischenposition bewegt wird.

6. Rouleau gemäß Anspruch 5, wobei das jeweilige dritte Verriegelungselement (32) ein rechteckiger, zentraler Block (33) ist, in dessen oberer Fläche (39) die Halteöffnung (34) vorgesehenen ist und welcher an seinen beiden Seiten drei Flügel (35, 36, 37) aufweist, welche Flügel sich in der Längsrichtung des zweiten Kanals (15) erstrecken, wobei ein erster und ein zweiter Flügel (35, 36) an Flächen des Blocks angrenzen, die an die Innenwände des Kanals anstoßen, und wobei der erste und der zweite Flügel gegen die Innenwände des Kanals geklemmt sind, um das dritte Verriegelungselement im Kanal in Position zu klemmen, und wobei der dritte Flügel (37) an die obere Fläche des Blocks angrenzt, wobei er zwischen die beiden zuvor genannten Flügel geklemmt ist, und wobei er die Schrägen bereitstellt.

7. Rouleau gemäß Anspruch 6, wobei der dritte Flügel (37) schwenkbar mit dem zentralen Block gekuppelt ist.

8. Rouleau gemäß Anspruch 6 oder 7, wobei die ersten beiden Flügel (35, 36) an ihren einander zugewandten Seiten mit einem Ansatz (38) versehen sind zum Halten des dritten Flügels (37), wobei die ersten beiden Flügel an den einander gegenüberliegenden Seiten bevorzugt einen Vorsprung aufweisen.

9. Rouleau gemäß einem der vorhergehenden Ansprüche, wobei die Zugstange (6) zumindest an ihrem unteren Ende mit einer Bürste (26) versehen ist, welche in den ersten Kanal (10) hinein vorsteht und welche bevorzugt in Kontakt mit dem Boden des Kanals ist.

10. Rouleau gemäß Anspruch 9, wobei die Bürste mit einem Bürstenhalter (27) versehen ist, der eine Passage für den Führungsbolzen (11) aufweist.

11. Rouleau gemäß Anspruch 9 oder 10, wobei die Bürste (26) mittels eines Schnappverbinders (31) mit der Zugstange (6) gekuppelt ist.

12. Rouleau gemäß einem der vorhergehenden Ansprüche, wobei im Endstück (14) ein Auslass (24) ausgebildet ist, welcher Auslass mit dem ersten Kanal (10) in Verbindung steht.

13. Rouleau gemäß einem der vorhergehenden Ansprüche, wobei jedes Endstück (14) ein in den ersten Kanal hinein vorstehendes Montageelement zum Aufnehmen des Endes eines Führungsbolzens (11) aufweist.

14. Rouleau gemäß einem der vorhergehenden Ansprüche, wobei das Gewebematerial mit Säumen versehen ist, mittels welcher das Gewebematerial an den Führungsbolzen (11) geführt ist, wobei jeder Saum aus Kunststoffmaterial mit einem sehr geringen Reibungskoeffizienten hergestellt ist.

15. Rouleau gemäß einem der Ansprüche 4-14, wobei das dritte Verriegelungselement (32) mit zwei Halteöffnungen (34) versehen ist.

16. Rouleau-Vorrichtung, die zwei Rouleaus gemäß Anspruch 15 aufweist, wobei die Rouleaus gemeinsame Seitenführungen (7, 8) aufweisen.

Revendications

1. Ecran à rouleaux, en particulier porte à écran à rouleaux, comprenant un matériau d'écran, un mécanisme d'enroulement pour ledit matériau d'écran, un logement (5), dans lequel est monté ledit mécanisme d'enroulement, une barre de traction (6) sur laquelle est fixée l'extrémité du matériau d'écran faisant saillie à partir du logement, et deux guidages latéraux (7,8) pour guider ledit matériau d'écran et les extrémités de ladite barre de traction, dans lequel une broche de guidage (11) est montée dans un canal (10) de chaque guidage latéral, broche de guidage sur laquelle est guidé ledit matériau d'écran, et dans lequel est prévu un mécanisme de verrouillage qui verrouille ladite barre de traction dans une position d'extrémité,
caractérisé en ce que chaque guidage latéral est équipé, au moins à son extrémité détournée du logement, d'un second canal (15) s'étendant à côté dudit premier canal, dans lequel une pièce d'extrémité (14) comprenant un premier élément de verrouillage (16) qui fait saillie dans ledit second canal est monté dans ladite extrémité de chaque guidage latéral, dans lequel la barre de traction comprend un second élément de verrouillage (18) sur ses extrémités, lequel second élément de verrouillage épouse le premier élément de verrouillage dans la position d'extrémité dans le but de verrouiller la barre de traction dans ladite position d'extrémité.

2. Ecran à rouleaux selon la revendication 1, dans lequel chaque second élément de verrouillage (18) se présente sous la forme d'une broche de verrouillage qui fait saillie à partir de l'extrémité respective de la barre de traction dans le second canal (15) et qui peut être rentrée en opposition à une force de ressort, dans lequel chaque premier élément de verrouillage (16) se présente sous la forme d'une ouverture de retenue (17) pour recevoir une broche de verrouillage, dans laquelle ladite barre de traction (6) porte un mécanisme de fonctionnement (20) pour faire rentrer les broches de verrouillage.

3. Ecran à rouleaux selon la revendication 2, dans lequel chaque pièce d'extrémité comprend une rampe (19) qui guide ladite broche de verrouillage (18) vers ladite ouverture de retenue (17) lorsque la barre de traction (6) est déplacée sur sa position d'extrémité.

4. Ecran à rouleaux selon la revendication 2 ou 3, dans lequel chaque guidage latéral (7,8) est muni dudit second canal (15) sur toute sa longueur, dans lequel un troisième élément de verrouillage (32) comprenant une ouverture de retenue (34) est prévu dans ledit second canal pour verrouiller la barre de traction (6) sur une position intermédiaire.

5. Ecran à rouleaux selon la revendication 4, dans lequel ledit troisième élément de verrouillage (32) est muni d'une rampe de chaque côté de ladite ouverture de retenue, lesquelles rampes guident la broche de verrouillage vers la position de retenue (34) lorsque la barre de traction (6) est déplacée sur la position intermédiaire.

6. Ecran à rouleaux selon la revendication 5, dans lequel chaque troisième élément de verrouillage (32) est un bloc central rectangulaire (33) dans une surface supérieure (39) duquel est prévue l'ouverture de retenue (34), et qui porte trois ailes (35,36,37) de chaque côté, lesquelles ailes s'étendent dans la direction longitudinale dudit second canal (15), une première et une seconde aile (35,36) sont limitrophes des surfaces dudit bloc qui viennent en butée contre les parois internes dudit canal, et dans lequel lesdites première et seconde ailes sont bridées contre les parois internes dudit canal pour fixer le troisième élément de verrouillage en position dans ledit canal, et dans lequel ladite troisième aile (37) est limitrophe de la surface supérieure dudit bloc, dans lequel il est bridé entre les deux ailes précitées et dans lequel il fournit lesdites rampes.

7. Ecran à rouleaux selon la revendication 6, dans lequel ladite troisième aile (37) est raccordée de façon pivotante audit bloc central.

8. Ecran à rouleaux selon la revendication 6 ou 7, dans lequel les deux premières ailes (35,36) sont munies d'une came (38) sur leurs côtés en regard pour retenir ladite troisième aile (37), dans lequel lesdites deux premières ailes ont de préférence une saillie sur les côtés opposés.

9. Ecran à rouleaux selon l'une quelconque des revendications précédentes, dans lequel ladite barre de traction (6), au moins dans son extrémité inférieure, est munie d'une brosse (26) qui fait saillie dans ledit premier canal (10) et qui est de préférence en contact avec le fond dudit canal.

10. Ecran à rouleaux selon la revendication 9, dans lequel ladite brosse est munie d'un porte - brosse (27) comprenant un passage pour ladite broche de guidage (11).

11. Ecran à rouleaux selon la revendication 9 ou 10, dans lequel ladite brosse (26) est raccordée à ladite barre de traction (6) au moyen d'un assemblage rapide (31).

12. Ecran à rouleaux selon l'une quelconque des revendications précédentes, dans lequel une douille (24) est formée dans ladite pièce d'extrémité (14), laquelle douille se raccorde au dit premier canal (10).

13. Ecran à rouleaux selon l'une quelconque des revendications précédentes, dans lequel chaque pièce d'extrémité (14) porte un élément de montage faisant saillie dans ledit premier canal pour recevoir l'extrémité d'une broche de guidage (11).

14. Ecran à rouleaux selon l'une quelconque des revendications précédentes, dans lequel ledit matériau d'écran est muni de bords, au moyen desquels ledit matériau d'écran est guidé sur lesdites broches de guidage (11), dans lequel chaque bord est réalisé à partir de matériau plastique ayant un très faible coefficient de friction.

15. Ecran à rouleaux selon l'une quelconque des revendications 4 - 14, dans lequel ledit troisième élément de verrouillage (32) est muni de deux ouvertures de retenue (34).

16. Ensemble d'écran à rouleaux comprenant deux écrans à rouleaux selon la revendication 15, dans lequel lesdits écrans à rouleaux ont des guidages latéraux communs (7,8).

Drawing