CH711198A2 - Closing device for a multi-leaf sliding door and insect protection door with a closing device. - Google Patents

Abstract

The invention relates to a closing device for a multi-leaf sliding door, in particular for an insect screen door, with at least two along a stationary guide rail of a sliding door frame against each other rectilinearly movable door wings (6a, 6b), each having at least one holding element (26) between which an elastic elastic band ( 30) is tensioned and guided, which is stretched when moving one of the door leaves (6 a) in an open position, and the door (6 a) automatically moves back into a closed position.

Description

The invention relates to a closing device for a multi-leaf sliding door with at least two along a stationary guide rail of a sliding door frame against each other rectilinearly movable door wings. It further relates to an insect screen door with such a closing device.

Sliding doors are often used as interior doors or as a space-saving door element for partitions, cabinets or wardrobes. Also known are insect protection devices with sliding doors or sliding frames, which are installed in the area of building openings as penetration protection against insects, pollens or pollutions. Especially in the area of large-area passages, such as terrace and balcony doors or conservatories sliding doors are preferred in comparison to rotating frame doors, inter alia, for reasons of optical attractiveness.

Such insect screens are often designed as single or multi-leaf sliding systems, with one or more doors guided along a rectilinear guide rail against each other slidably and / or are stored. The sliding system typically includes a fixed rectangular mounting frame surrounding the building opening, which is composed of a number of hollow profile strips. The frequently made of aluminum hollow profile strips serve as a clamping frame for a protective fabric or protective grid, which is stretched for example via a rear side piping between the hollow profile strips.

The doors have guide rail side roller or sliding elements as a sliding linear bearing on the guide rail. This makes it possible for a user to open the door by a simple, sideways directed sliding, the door is active to push back to close by the user. Here, the problem may arise that the door is not or not completely pushed back by the user, so that the sliding door is completely or at least partially open. In particular, in the case of an insect screen, the interior of the building is no longer protected against the ingress of insects, pollen or dirt.

As a remedy, therefore, a closing device is desirable, which moves the door automatically from an open position into a closing the building interior closing position.

The invention is therefore based on the object, a particularly suitable, automatically closing device for a sliding door, in particular for a two-leaf insect screen, specify.

With regard to the closing device, this object is achieved according to the invention by the features of claim 1. With respect to the closing device comprehensive insect screen door, the object is achieved by the features of claim 11. Advantageous embodiments and further developments are the subject of the respective dependent claims.

The closing device according to the invention is suitable for the automatic closing of a multi-leaf sliding door with at least two along a stationary guide rail of a sliding door frame against each other rectilinear movable door panels and set up. For this purpose, the closing device comprises an elastic elastic band which is stretched and guided between a number of holding elements. For this purpose, in each case at least one holding element is arranged on one of the door wings. The elastic band is guided between the holding elements such that upon moving one of the door leaves into an open position, the elastic band is tensioned such that, due to its elastic tension force, the elastic strip automatically engages the door leaf - usually after the omission of an opening load - in one or a predetermined closing position moved back. Closing position is to be understood, in particular, as meaning a position of the door leaf in which it rests tightly and conclusively against the sliding door frame. Under elastic is in particular a band-like, i. rope or thread-shaped, elongated element of an elastic material understood.

When you open the door, that is in a sideways sliding a door along the guide rail by a user, the elastic band is stretched, and it builds up a clamping or restoring force, by means of the holding elements on the opening door acts. If the door is released by the user in an open or at least partially open position, this restoring force causes the door leaf is moved back into the closed position. In this case, the elastic band relaxes and the restoring force is reduced, so that the closing device is operational again when the sliding door is opened again.

The elastic band is designed in particular as a single rope or band-like tensioning element made of an elastic rubber material. It is also conceivable, however, for example, a design form with a plurality of behind or juxtaposed, for example, stranded or twisted clamping elements acting together as a common elastic band, for example in the manner of an expander, for the sliding door.

By the elastic band a structurally simple and particularly cost-locking device is provided. The elasticity of the rubber band serves as a kind of energy storage, which is supplied with clamping energy when opening the door, which can then be used as kinetic energy for closing the sliding door.

The storage capacity is given here essentially by the length and / or the elasticity of the rubber band. Furthermore, this is the restoring force of the elastic, that is, the force that counteracts the force expended by the user to open the sliding door, and the return speed during a closing operation in which the sliding door is moved back by the tensioned elastic in the closed position, adaptable.

In a preferred embodiment, the length and elasticity of the rubber band is preferably dimensioned such that the restoring force on the one hand is low enough that the door can be easily moved by a user in an open position. Furthermore, it is ensured by a low restoring force that the open door is not moved too quickly in the closed position, and so there is no undesirable damage to the sliding door frame due to a violent up or striking the door leaf on the sliding door frame. On the other hand, the restoring force is suitably chosen sufficiently large that the sliding door is closed as quickly as possible, for example, to counteract the entry of insects, pollen or dirt into the building interior when used in the area of a building opening.

In an advantageous embodiment, guide rail side and / or sliding door frame side brake elements are provided which reduce the return speed of the rubber band in the region of the sliding door frame sides (brakes down). As a result, a violent up or striking the door leaf on the sliding door frame is advantageously counteracted. In addition or as an alternative, damping elements may also be arranged on the sliding door frame, for example, which cushion or dampen an opening or striking of the door leaf such that the closing door leaf does not rebound against the sliding door frame and remains in a partially open position.

In a preferred embodiment, the door leaf is formed from horizontal and vertical profile elements. Thus, the door is particularly low in weight, whereby he is on the one hand easier to move by a user, and on the other hand also from the elastic easier and more reliable in the closed position is movable. As a result, the material requirements are reduced to the elastic band, which translates advantageously to the manufacturing cost.

In a preferred embodiment, the profile elements are, in particular, cut-to-length hollow profile strips which can be mounted to one another by means of corner connectors to form a substantially rectangular frame. In particular, the sliding door frame is preferably composed of such profile elements. As a result, a user can customize the sliding door individually to the dimensions of a respective building opening by simply cutting or pledging the profile elements. For this purpose, the corner connectors, preferably also for the purpose of improved visual attractiveness, have overlapping collar elements for covering unclean cut edges or profile ends.

Preferably, at least the profile elements of the door wings on the back, that is, on the interior side facing the building, a Keder groove for receiving a Kederelementes or the like, by means of which a protective fabric or protective grid can be stretched within the door leaf frame.

The stationary guide rail is suitably part of the sliding door frame and coupled in the manner of a horizontal profile element with this. Conveniently, the door leaf comprises a roller or sliding guide in the region of the guide rail. The guide rail may for example be arranged on the upper side, on the underside or else on the upper and lower sides of the sliding door frame. It is also conceivable that a separate guide rail is provided for each door of the sliding door. In a guide rail which is arranged only on one side, the door leaf in a preferred embodiment on the side facing away from the guide rail suitably has a bearing which counteracts an unintentional swinging out of the door leaf from the sliding door frame.

In a suitable development, the holding elements are designed as corner connecting elements of the profile elements. Preferably, the holding elements in this case have molded-on plug elements, which are at least partially insertable into corresponding profile chambers of the profile elements. Furthermore, it is desirable for the holding elements to have molded-on projections for covering the cut edges of the profile element ends.

In an expedient embodiment, the holding elements are arranged in the region of the guide rail. As a result, in particular, the elastic band is positioned near the guide rail, which is beneficial to the stability of the door leaf to the guide rail during a closing operation. In a preferred embodiment, the holding elements are arranged in the guide rail facing the corner regions of the door leaf frame. Alternatively, however, it is also conceivable that the holding elements are arranged, for example, in the region of a door leaf center rung.

In an advantageous embodiment, the holding elements are screw-mounted in the horizontal profile elements. As a result, on the one hand, the stability of the entire door leaf frame is improved. On the other hand, a particularly secure attachment of the elastic band is ensured. In particular, in an open sliding door, in which the elastic band is stretched and act the largest restoring forces, a reliable attachment by a screw connection is advantageous. As a result, the danger of tearing out the retaining elements from the profiles of the door leaf frame is avoided by simple means.

In an optically particularly attractive development of the elastic band is at least partially performed in the assembled state within a horizontal profile element. As a result, the elastic is suitably protected against external weather or damage - for example, by animals. On the one hand, this improves the longevity of the elastic band, on the other hand the risk of tearing the elastic band due to wear or damage is thereby advantageously reduced. Furthermore, the elastic is guided even in the event of a tearing within the profile element, whereby he can not get outside. Thus, personal injury or damage to related items in the event of a Gummizugrisses are advantageous and easily avoided.

In a suitable embodiment, the holding element has a sliding block-like sliding element for a sliding guide on the guide rail. As a result, the movable guide bearing of the door leaf is essentially realized by the holding elements.

In an advantageous embodiment, the holding elements have a circumferentially extending guide groove for guiding the elastic band. The guide groove can be designed, for example, on the outside on a housing of the holding element, but is preferably arranged at least partially within the housing for protecting the elastic band.

For use as a closing device, it is particularly advantageous to use the longest possible elastic band with high extensibility, as this distributes the voltage at an opening of the sliding door evenly and better along the elastic band. As a result, on the one hand reduces the burden of the elastic in use, which is beneficial to its longevity. On the other hand, this makes the sliding door particularly easily pushed by an applicator. For this purpose, in a preferred embodiment, the elastic band is fastened to a first holding element of the door leaf and guided horizontally along the door leaf to a second holding element. At the second holding element of the elastic band is preferably deflected by the guide approximately U-shaped on the opposite side of the door leaf in the opposite direction. In particular, the second holding element essentially acts as a reversing roller for the elastic band, whereby an elastic band can be used which is particularly long in the untensioned state.

In an advantageous embodiment, it is provided that the first and second holding element of two adjacent door leaves are arranged on opposite sides of the door leaf, so that the elastic band is guided by the holding elements of the door approximately eight-shaped. Preferably, one of the involved door is stationary in this development.

In this development, a particularly long and elastic elastic band can be used. The functional memory capacity for the closing function is ensured by the reversing roller-like guidance of the elastic band on the second holding elements. As a result, a flaschenzugartige construction is realized, whereby the force required for pushing the sliding door is advantageously reduced by the longer Dehnweg.

Upon opening the sliding door, the moving door is telescopically moved in the same direction on the fixed door, so that the elastic is stretched in the transition region from one door to the other between the doors. In the fully open state, in which the door leaves are arranged substantially one above the other, the elastic band is stretched by approximately the length of a door leaf. In the absence of the opening force application, the elastic band contracts to its original length, so that the eight-shaped guide of the elastic pulls the moving door leaf to the closed position. In a possible further development form, the elastic band in the relaxed state, for example, about 4.8 m long and is stretched when opening the door to about 6 m in length.

In the preferred application, the closing device is part of an insect screen door for a building opening. Suitably, the frame structures of the door wings are covered here with an insect screen or insect screens.

Preferably, only a movable door is provided, which is displaceable relative to a fixed door. However, it is also possible to realize a plurality of flush-mounted or staggered door leaves. It is conceivable that each door has its own closing device, or a plurality of doors, for example, by driving elements on the guide rail with each other by a closing device in a closed position can be brought.

However, the closing device is not reduced to the above application in the area of a building opening. Rather, it is also conceivable to use the closing device generally for sliding door elements, such as sliding windows, shower enclosures or wardrobes.

Embodiments of the invention are explained in more detail with reference to a schematic and simplified drawing. Show: <Tb> FIG. 1 <SEP> in perspective view an insect protection device with a sliding door with two door wings, a sliding door frame and a closing device in the region of the base side door leaf frame, <Tb> FIG. 2 <SEP> in perspective view of the sliding door in the region of an underground side guide rail with attached support slide as corner connector of the door leaf frame, <Tb> FIG. 3 <SEP> in perspective view a holding slide with an elastic band, <Tb> FIG. 4 <SEP> in an exploded view of the holding carriage, <Tb> FIG. 5 <SEP> in perspective a sectional view of the elastic band between two adjacent holding carriages of the door wings along the section line I-I in FIG. 1, <Tb> FIG. 6 <SEP> in plan view the course of the elastic band with closed door wings, <Tb> FIG. 7 <SEP> in plan view the course of the elastic with open doors, and <Tb> FIG. 8 <SEP> in plan view an alternative course of the elastic with closed doors.

Corresponding parts are always provided in all figures with the same reference numerals.

The insect protection device 2 shown in Fig. 1 comprises a sliding door 4 with two door wings 6a, 6b and a sliding door frame 8. The stable sliding door frame 8 is arranged in the region of a building opening for a balcony or a terrace on a door reveal, not shown. The sliding door frame 8 comprises three hollow profile-like frame strips 10, which are arranged by means of two corner connectors 12 approximately U-shaped to each other. On the underside, the sliding door frame 8 has a guide rail 14. By the frame strips 10 and the guide rail 14 of the sliding door frame 8 is executed in an approximately rectangular shape.

The door leaves 6a and 6b of the sliding door 4 have an approximately rectangular door leaf frame 16. The door leaf frame 16 is composed of two vertical strips 18 as long sides and two horizontal strips 20 as narrow sides. The door leaf frame 16 further comprises a horizontal mid-rung 22 approximately at half height of the vertical strips 18, which extends substantially over the entire width of the door leaf frame 16. In the thus formed upper and lower half areas of the door leaf frame 16, a protective fabric 24 is clamped as a penetration protection against insects, pollens and pollen. For this purpose, the vertical strip 18, the horizontal bar 20 and the central rung 22 are similar to the frame strips 10 designed as a hollow profile strips, the receiving chambers not shown in detail for a piping for attachment of the protective fabric 24. By way of example, only one door leaf is provided with the reference numerals in the figures.

As is comparatively clear in FIG. 2, the door leaf frame 16 is assembled in the base-side frame corner regions by means of two support slides 26. The support carriage 26 are arranged in the manner of a sliding guide for the door leaf 6 a, 6 b on two mutually parallel spaced rails 28 a, 28 b of the guide rail 14. In the closed state of the insect protection device 2, the door leaf frame 16 of the door leaves 6a and 6b are at least partially arranged one above the other, in particular staggered by the staggered arrangement on the rails 28a and 28b, the facing vertical strips 18 of the door wings 6a and 6b substantially one above the other. In the assembled state, a band-shaped or rope-shaped elastic band 30 is stretched between the holding carriage 26 as an integral part of an automatically acting closing device 32 for the sliding door 4.

In the following, the structure of the support carriage 26 is explained in more detail with reference to FIGS. 3 and 4. The holding carriage 26 essentially comprises a door leaf frame-side holding body 34 as a corner connecting element and a running rail side sliding body 36 for sliding slide bearing on the guide rail fourteenth

The holding body 34 has two vertically oriented plug-in elements 38. The substantially rectangular plug-in elements 38 are in the assembled state in receiving chambers not shown in detail of the hollow-profile-like vertical strips 18 plugged into this. In the direction of the horizontal bar 20, the holding body 34 has an integrally formed insertion tab 40, which can be inserted at least partially into the horizontal bar 20. The holding body 34 includes in this area a protruding vertical projection 42. The projection 42 has two circular recesses 44, by means of which the holding body 34 can be stably fixed to the horizontal bar 20 by means not shown fastening screws.

In the underground region of the holding body 34 is a downwardly open receiving chamber 46 is formed for receiving the slider 36. As can be seen in FIG. 3, in the assembled state, the sliding body 36 lies essentially completely inside the receiving chamber 36. For attachment, the slider 36 has an approximately central hollow-cylindrical recess 48, through which a fastening screw on the bottom side into a corresponding receptacle of the receiving chamber 36 can be screwed.

The approximately sliding block-like sliding body 36 has a track-side guide groove 50 which is formed substantially by a U-shaped recess open towards the ground. The guide groove 50 extends substantially over the entire length of the slider 36 and is aligned in the mounted state on the side facing away from the horizontal bar 20 end face of the receiving chamber 36 in a complementarily shaped recess 52nd

The substantially rectangular slider 36 has on its side facing the horizontal bar 20 end face an integrally formed nose-shaped projection 54 for facilitated placement of the slider 36 on the guide rail 14. On the vertical bar 18 facing surface of the slider 36 a guide groove 56 for guiding the rubber band 30 is circumferentially arranged. The guide groove 56 has a rounded cross-section which corresponds approximately to a segment of a hollow cylinder. The guide groove 56 guides the elastic band 30 approximately U-shaped within the receiving chamber 46, wherein the receiving chamber 46 has a guide slot 58 in this area.

The guide slot 58 is arranged at approximately half the height of the receiving chamber 46, so that the receiving chamber 46 from the side has an approximately U-shaped form, wherein the guide slot 58 extends from the horizontal bar 20 facing away from the end of the receiving chamber 46 ago. In this case, the cutout 52 is expediently arranged on the underside U-leg, wherein the second U-leg facing the vertical strips 18 has a protruding projection 60 on the longitudinal side.

In the assembled state, the door leaves 6a and 6b are mounted standing on the rails 28a, 28b of the guide rail 14 by means of two support slides 26a, 26a and 26b, 26b respectively. The door 6b hereby fixed on the running rail 28b fixed by fastening or locking means not shown in the region of the guide rail 14 or the sliding door frame 8. The door leaf 6a is movable along the running rail 28a in a straight line against the standing door leaf 6b by a user to open the sliding door 4. For this purpose, the door leaf 6a is displaceable by means of a handle element not shown in the region of the central rung 22 with a laterally directed admission.

When the sliding door 4 is opened, the elastic band 30 is tensioned, wherein after an elimination of the application, the sliding door 4 is automatically moved by the closing device 32 into a closed position. The mode of operation and the construction of the closing device 32 are explained in more detail below with reference to FIGS. 5, 6 and 7.

5 shows a section through the holding elements 26 in the region of the overlapping vertical strips 18 of the door leaves 6a and 6b. When the sliding door 4 is in the closed state, the holding carriages 26a of the lower right corner portion of the door panel 6a and the lower rack corner holding tray 26b of the door panel 6b are positioned side by side substantially opposite to each other on the rails 28a and 28b. The holding carriages 26a and 26b are thus arranged on the guide rail 14 oriented substantially opposite one another.

The sectional view shown is arranged approximately at the level of the guide slot 58 and comparatively clearly shows an approximately Z-shaped course of the elastic (rubber) 30 between the support carriage 26a and 26b, wherein the horizontal Z-beams substantially parallel to the door wings 6a and 6b are oriented. As this comparatively clear, the cross section of the guide slot 58 is sized so large enough that the elastic band 30 can be passed.

In particular, the Z-shaped profile is formed by the elastic strip 30 is diverted by the guide groove 56 of the support carriage 26a in the manner of a guide roller approximately U-shaped, so that it runs on the opposite door leaf side in the opposite direction. Immediately after the U-shaped deflecting bend, the elastic band 30 is guided out of the guide slot 58 of the holding carriage 26a along the oblique Z-bar into the guide slot 58 of the holding carriage 26b. In the support carriage 26b of the elastic band 30 is guided by the guide groove 56 U-shaped on the back of the door leaf 6b.

Fig. 6 shows in plan view schematically the door leaf 6a, 6b and the elastic band 30 in the closed position. Closing position in this context means a position of the door leaves 6a, 6b in which the interior of the building is completely covered by the insect protection device 2. As can be seen in FIG. 6, the door leaves 6a and 6b are arranged substantially side by side in the closed position, wherein they substantially overlap one another at the mutually facing vertical strips 18.

The elastic band 30 is attached at one end in a manner not shown to the two sliding door frame-side support carriage 26a and 26b of the door 6a and 6b. The elastic band 30 is fixed to the building outside on the support carriage 26a and is deflected by its guide groove 56 U-shaped on the building inside surface of the door leaf 6a. The elastic band 30 extends through a corresponding groove or receiving chamber of the horizontal strip 20 substantially horizontally and parallel to the door leaf 6a to the support carriage 26a. In the region of the support carriage 26a, the elastic strip 30 is transferred, according to the above-described Z-shaped course, by the support carriages 26a and 26b to the building exterior side surface of the door leaf 6b. The elastic band 30 extends within the horizontal strip 20 of the door leaf 6b to the support carriage 26b, where it is redirected by the guide groove 56 U-shaped, and building inside the support carriage 26b is attached.

As a result, an approximately achtförmiger course of the rubber band 30 is realized on the sliding door 4, wherein in an opening of the sliding door - as shown in Fig. 7 - in particular the oblique Z-beam in the transition region between the support carriage 26a and 26b is stretched. As a result, a restoring force is built up which moves the door leaf 6a back into the closed position after an omission of the opening loading.

FIG. 8 shows an alternative guidance of the rubber cord 30 with the door wings 6a and 6b closed. In this embodiment, the elastic 30 is attached not to the sliding door frame-side support carriages 26a and 26b but to a portion of the support carriages 26a and 26b, respectively. As a result, the elastic band 30 is made longer by approximately the width of the door leaves 6a and 6b than in the preceding variant. By a variation of the attachment point, it is possible, for example, for a user to adapt the restoring force or the return speed of the closing device 32. For this purpose, for example, additional, not shown, nut-like fastening elements for fixing the elastic strip along a horizontally extending groove of the horizontal bar 20 may be provided.

In a suitable embodiment, the profile strips of the sliding door frame 8 and the door leaf frame 16 are designed as ablängbare aluminum components. The projection 42 and 60 of the support carriage 26 are the vertical strips 18 and horizontal strips 20 for this purpose so far beyond that cut edges and ends of the moldings are visually unobtrusive covered.

In the first embodiment, the elastic band 30 in a suitable dimensioning in the relaxed state is approximately 2.4 m long, which corresponds approximately to the width of the two door leaves 6a and 6b. In the fully opened state, the elastic band 30 is stretched substantially by the width of the door leaf 6b, so that the rubber cord 30 is about 3.6m long.

For the second embodiment, the length of the elastic band 30 in the relaxed state about 4.8m and in the open state about 6m. Here, it is conceivable for the purpose of increased flexibility that the elastic band 30 is designed to be cut to length, so that the insect protection device 2 on the one hand to the dimension of a respective building opening is adaptable, or a selection between the two attachment points of the embodiments is possible.

The invention is not limited to the embodiments described above. Rather, other variants of the invention can be derived therefrom by the person skilled in the art without departing from the subject matter of the invention. In particular, all the individual features described in connection with the exemplary embodiments can also be combined with one another in other ways, without departing from the subject matter of the invention.

LIST OF REFERENCE NUMBERS

[0056] <Tb> 2 <September> insect protection device <Tb> 4 <September> Sliding <tb> 6a, 6b <SEP> Door leaves <Tb> 8 <September> sliding door frame <Tb> 10 <September> Moldings <Tb> 12 <September> corner connector <Tb> 14 <September> guide rail <Tb> 16 <September> door sash <Tb> 18 <September> Vertical bar <Tb> 20 <September> Horizontal bar <Tb> 22 <September> Central rung <Tb> 24 <September> protective fabric <tb> 26, 26a, 26a, 26b, 26b <SEP> Carriage <tb> 28a, 28b <SEP> Track <Tb> 30 <September> elastic / rope <Tb> 32 <September> closure device <Tb> 34 <September> holding body <Tb> 36 <September> sliding <Tb> 38 <September> plug-in element <Tb> 40 <September> tuck <Tb> 42 <September> projection <Tb> 44 <September> recess <Tb> 46 <September> receiving chamber <Tb> 48 <September> recess <Tb> 50 <September> guide <Tb> 52 <September> recess <Tb> 54 <September> extension <Tb> 56 <September> guide <Tb> 58 <September> guide slot <Tb> 60 <September> projection

Claims (11)

1. closing device (32) for a multi-leaf sliding door (4) with at least two along a stationary guide rail (14) of a sliding door frame (8) against each other rectilinearly movable door leaves (6a, 6b), characterized in that the door leaves (6a, 6b) respectively have at least one holding element (26), between which an elastic elastic band (30) is stretched and guided, which is stretched when moving one of the door leaves (6a) in an open position, and the door (6a) automatically moves back into a closed position. 2. closing device (32) according to claim 1, characterized in that the door leaf (6a, 6b) of horizontal and vertical profile elements (18, 20) is formed. 3. Closing device (32) according to claim 2, characterized in that the holding elements (26) are designed as corner connecting elements of the profile elements (18, 20). 4. closing device (32) according to claim 2 or 3, characterized in that the holding elements (26) in the region of the guide rail (14) are arranged. 5. Closing device (32) according to any one of claims 2 to 4, characterized in that the holding elements (26) in the horizontal profile elements (20) are screw-mounted. 6. Closing device (32) according to any one of claims 2 to 5, characterized in that the elastic band (30) is guided in the assembled state at least partially within a horizontal profile element (20). 7. Closing device (32) according to one of claims 1 to 6, characterized in that the holding elements (26) have a sliding block-like sliding element (36) for a sliding guide on the guide rail (14). 8. Closing device (32) according to one of claims 1 to 7, characterized in that the holding elements (26) have a circumferentially extending guide groove (56) for guiding the rubber band (30). 9. Closing device (32) according to one of claims 1 to 8, characterized in that the elastic band (30) on a first holding element (26 a, 26 b) of the door leaf (6 a, 6 b) attached and horizontally along the door leaf (6 a, 6b) to a second holding element (26a, 26b) is guided, wherein the second holding element (26a, 26b) deflects the elastic band (30) approximately U-shaped on the opposite side of the door leaf in the opposite direction. 10. Closing device (32) according to one of claims 1 to 9, characterized in that first and second holding elements (26a, 26a, 26b, 26b) of two adjacent door leaves (6a, 6b) are arranged on opposite sides of the door leaf, so that the elastic band (30) of the holding elements (26 a, 26 a, 26 b, 26 b) of the door (6 a, 6 b) is guided approximately achtförmig. 11. insect screen door (2) for a building opening, with a closing device (32) according to one of claims 1 to 10.