Insect screen door and door hinge for this

Abstract

Insect screen door (1), comprising - a pivotable door frame (2) composed of longitudinal profiles (2a) and transverse profiles (2b), wherein at least one of the longitudinal profiles (2a) has a joining chamber (9) extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot (10), - a holding frame (3) with at least one longitudinal profile (3a) with a joining chamber (11) extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot (12), - at least one door hinge (4) with a first hinge rod (13) with two spaced first hinge bushings (13a, 13b) and with a second hinge rod (14) with two spaced second hinge bushings (14b) and with a hinge axis (15) passing through the hinge bushings (13a, 13b; 14a, 14b) of the hinge rods (13, 14), and - a helical spring (16) arranged on the hinge axis (15) between the hinge bushings (13a, 13b; 14a, 14b) with spring legs (16b) running at least in sections parallel to the hinge axis (15), which spring legs each engage over one of the second hinge bushings (14a, 14b) and at least partially encompass one of the first hinge bushings (13a, 13b).

Description

[0001] The invention relates to an insect screen door with a pivoting door frame made of longitudinal and transverse profiles and with a support frame with at least one longitudinal profile and at least one door hinge. It further relates to a door hinge for such an insect screen door.

[0002] From DE 10 2012 018 077 A1 an insect protection device with a stationary outer frame and with a revolving door pivoted about a vertical axis via frame or wing hinges is known, wherein the hinges are pivoted into a profile channel and secured against lateral displacement and are then screw-fixed.

[0003] DE 100 34 071 A1 discloses a pivoting door for closing an opening, in particular a fly screen door as an insect screen, with a frame made of aluminum profiles. The known door can be opened to both sides like a swing door. A torsion bar, which is integrated into or arranged on the frame, serves as a return device, moving the frame to its initial position to close the opening.

[0004] From DE 10 2019 207 938 B4 an insect screen swing door with a pivoting door frame and with a holding frame and with at least one door hinge having a spring is known, which has a first hinge bushing of a first hinge band with a first control contour running obliquely with respect to a hinge axis and a second hinge band with a second hinge bushing and with a third hinge bushing with a second control contour corresponding to the first control contour.

[0005] The invention is based on the object of providing an improved insect screen door, in particular a swinging insect screen door. Furthermore, a hinge (door hinge) particularly suitable for such an insect screen door is to be provided.

[0006] This object is achieved according to the invention with regard to the insect screen door (swing door) by the features of claim 1 and with regard to the hinge (door hinge) by the features of claim 14. Advantageous embodiments and further developments are the subject of the subclaims. The advantages and embodiments cited with regard to the insect screen door are also transferable to the hinge, and vice versa.

[0007] The insect screen door, which is preferably designed as an insect screen swing door, comprises an outer frame, hereinafter referred to as the support frame, and an inner frame, hereinafter referred to as the door frame. Both frames are preferably composed of profile strips (hollow profile strips). For this purpose, so-called corner connectors, for example, are suitably provided in the frame corners. The door frame is suitably designed to be closed (on the perimeter) by means of two longitudinal profiles and two transverse profiles. The support frame is suitably designed to be closed on all sides by means of two longitudinal profiles and two transverse profiles, in particular on the perimeter. The door frame is designed and configured to accommodate a mesh fabric. This can be clamped into the frame, preferably by means of flexible strips (keder strips).

[0008] The door frame is hinged or pivotally connected to the support frame, in particular to opposing longitudinal profiles. The door frame is suitably covered or can be covered with a corresponding mesh (mesh or the like) to form an insect screen door. In other words, the door frame is provided with an insect screen or is suitable and designed to support such an insect screen. The support frame is intended and configured to be inserted into a building or door opening or into a door frame or the like, preferably in a non-destructive manner, and to be fastened or held there.

[0009] The non-destructive mounting of the support frame is preferably achieved by means of one or more spring elements. The respective spring elements are designed as leg springs and have a first spring leg, which sits in a (longitudinally slotted) receiving chamber of the frame or its longitudinal profile, as a fixing leg, and a second spring leg, which protrudes from the frame or from the (longitudinally slotted) receiving chamber, as a clamping leg. This second spring leg is clamped, for example, behind a rebate or the like of a door frame (door frame, casing) fixed to the building.

[0010] Conveniently, at least one of the longitudinal profiles of the door frame has a joining chamber extending in the longitudinal direction of the profile, which is preferably accessible via a longitudinal slot. The stationary (outer) support frame has at least one longitudinal profile with a joining chamber extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot.

[0011] The insect screen door has at least one door hinge, with which the door frame is pivotally mounted (hinged) on the support frame. The door hinge has a first hinge rod and a second hinge rod, which is hinged to the first hinge rod via a hinge axis. The first hinge rod preferably has two (first) hinge bushings axially spaced along the hinge axis. The second hinge rod preferably also has two (second) hinge bushings axially spaced along the hinge axis. The hinge axis passes through the aligned hinge bushings of the two hinge rods.

[0012] Advantageously, the distance between the hinge bushings of the first hinge rod is greater than the distance between the hinge bushings of the second hinge rod. In particular, the distance between the hinge bushings of the first hinge rod corresponds to the sum of the distance between the two (second) hinge bushings and their axial length (height) of the second hinge rod. Expediently, the hinge bushings of the second hinge rod are arranged between the hinge bushings of the first hinge rod. Suitably, the hinge bushings of the two hinge rods lie against one another in pairs. In other words, one of the hinge bushings of the first hinge rod rests against one of the hinge bushings of the second hinge rod.

[0013] The door hinge has a coil spring (closing spring) arranged on the hinge axis between the hinge bushings of the hinge rods, with a bent or bent spring leg on both sides or on both end faces. The spring legs run parallel to the hinge axis, at least in sections. Each spring leg engages over a hinge bushing of the second hinge rod on the one hand, and at least partially encompasses a corresponding hinge bushing of the first hinge rod on the other.

[0014] In an advantageous embodiment, the coil spring comprises a helically wound spring rod, particularly in the manner of a tension spring, which coaxially surrounds the hinge axis, particularly between the hinge bushings of the second hinge rod. The spring rod suitably comprises a plurality of spring coils, for example, ten to thirty. Suitably, the spring legs of the coil spring are aligned axially opposite one another, at least in sections, i.e., point in opposite axial directions.

[0015] According to a further or different embodiment, the spring legs of the helical spring have axial leg sections (spring bars) and, at the ends thereof, curved sections that are bent at an angle, in particular at right angles, toward or away from the spring. These curved sections at least partially encompass the respective first hinge bushings. Preferably, the curved sections are bent in opposite directions, in particular clockwise or counterclockwise.

[0016] In a particularly advantageous development, the first hinge rod has, on the circumference of the first hinge bushings, an axial spring groove for an axial leg section and a circumferential groove for a curved section of the spring leg of the coil spring. The second hinge rod expediently has, on the circumference of the second hinge bushings, an axial spring groove for an axial leg section of the spring leg of the coil spring, in particular aligned with a corresponding axial spring groove of the first hinge rod. The spring grooves are designed, for example, as receiving recesses for the hinge rods.

[0017] The coil spring suitably tensions the two hinge rods via their paired hinge bushings. Particularly advantageously, when the insect screen door is (manually) opened, the coil spring of the or each door hinge is tensioned, particularly torsionally, so that the pivoted door frame automatically pivots back to its closed initial position, particularly resting against the support frame, with the insect screen door closed, due to the spring return force of the coil spring(s).

[0018] The hinge rods are designed, in particular, as injection-molded parts, with the coil spring being designed, in particular, as a bent spring wire. Due to manufacturing tolerances during the (injection) molding of the hinge rods and during the bending of the coil spring, a clearance of up to 1 mm (millimeter) can occur between the coil spring and the hinge rods in the home position of the door hinge. This means, for example, that for a door width of 100 cm (centimeters), the clearance on the opposite side of the door can be up to 10 cm.

[0019] An additional or further aspect of the invention therefore provides that the first hinge rod and the second hinge rod each have a threaded bore for an adjusting screw in the region of the hinge bushings, said bore running in particular tangentially to the respective hinge bushing. The threaded opening is designed in particular as a through bore which is open in the direction of the axial leg section, so that the adjusting screw, when screwed in, rests at least partially against the respective axial leg section, thereby compensating for play or tolerance between the coil spring and the respective hinge rod. As a result, the coil spring can be adjusted to the correct basic position relative to the hinge rods via the axial leg sections, counteracting this. As a result, the door hinge can be adjusted to the basic position completely free of play, so that the insect screen door closes reliably in the basic position.

[0020] The movement or play of the two hinge rods can be easily adjusted to zero by tightening the adjusting screw on the leg section. Using the adjusting screws, it is possible to precisely center and easily adjust the opening angle of the door hinge to the left and right. This compensates for rattling of the hinge rods and inaccuracies in the leg spring and metal parts.

[0021] The adjusting screw, designed for example as a threaded pin or grub screw, presses on the preloaded coil spring when screwed in in the rest position of the door hinge, so that the coil spring only lightly rests against a lug (driver) of the other hinge rod. The lug or drive is designed, for example, as an extension of the respective spring groove that overlaps the axial spring section. The lugs on the movable side (door side) preferably engage completely with the leg section. Because the leg sections essentially "rest" on the adjusting screws in the rest state, only a slight pressure is exerted and thus essentially does not lead to any friction points.

[0022] Compared to a version without an adjusting screw, the spring groove is deeper so that a sufficient adjustment range is achieved for compensation of play or tolerances.

[0023] Preferably, the threaded hole is oriented tangentially to the hinge bushing so that it is approximately perpendicular to the longitudinal and transverse profiles. In other words, the threaded hole is positioned as straight as possible. This allows a tool, such as an Allen key, to be easily and straightly positioned and turned to operate the adjusting screw once installed. A straight threaded hole orientation is also more visually appealing than a diagonal or transverse threaded hole.

[0024] In a preferred embodiment, a contact surface of the adjusting screw on the axial leg section is dimensioned substantially larger than or equal to the diameter of the axial leg section. This ensures that a (screw) head of the adjusting screw cannot slip during play compensation.

[0025] In a suitable development, the first hinge rod has at least one joining leg, preferably on the side of the hinge rod facing away from the first hinge bushing. Additionally or alternatively, the second hinge rod has at least one joining leg, preferably on the side of the hinge rod facing away from the second hinge bushing. Advantageously, the respective joining leg is designed like a slotted nut, in particular with a T-shaped or double-T-shaped cross section. Further preferably, the respective joining leg has at least one joining opening with a threaded pin inserted or screwable therein.

[0026] The or each joining leg of one of the hinge rods, in particular the first hinge rod, is inserted into the joining chamber of the longitudinal profile of the door frame, preferably from one of the end faces of the longitudinal profile of the door frame. The or each joining leg of the other hinge rod is inserted into the joining chamber of the longitudinal profile of the retaining frame, preferably from one of the end faces of the longitudinal profile of the retaining frame.

[0027] For detachable and non-destructive installation of the retaining frame in a doorway, particularly on a building door frame, a leg spring is inserted into the or each profile (longitudinal and / or transverse profile) of the retaining frame. This leg spring comprises a fixing leg that can be inserted or is inserted into the joining chamber of the retaining frame and a clamping leg that protrudes from the longitudinal slot of this joining chamber. Between the spring legs, a helical spring, particularly a tension spring bar, with a number of spring coils, particularly two to six, preferably three to five.

[0028] The door hinge, which is preferably provided and configured for an insect screen door, in particular for an insect screen swing door, has a hinge axis and a first hinge rod with two first hinge bushings axially spaced along the hinge axis, and a second hinge rod with two second hinge bushings axially spaced along the hinge axis, which are aligned with the hinge bushings of the first hinge rods and are penetrated by the hinge axis.

[0029] The door hinge also has a coil spring arranged on the hinge axis between the hinge bushings, with spring legs that run parallel to the hinge axis at least in sections. The spring legs each overlap one of the hinge bushings of the second hinge rod and at least partially or partially encompass one of the hinge bushings of the first hinge rod.

[0030] To stabilize the door frame, a retaining profile is advantageously provided with two mutually perpendicular retaining legs and a preferably two-part, advantageously adjustable or length-adjustable stabilizing leg connecting these, in particular to form a triangular shape. During installation of the insect screen door, one of the retaining legs is inserted into the longitudinal profile and the other retaining leg is inserted into the (lower, floor-side) transverse profile of the door frame. For this purpose, the corresponding profiles have joining chambers provided with a longitudinal slot, into which the retaining legs can be inserted, preferably from one of the profile's front sides. Alternatively or additionally, the retaining legs can be screwed to the profiles in the corner area.

[0031] An embodiment of the invention is explained in more detail below with reference to a drawing. In the drawings: Fig. 1 in a rear view of an insect screen door with a door frame hinged to a support frame via door hinges with an insect screen, Fig. 2 an excerpt II from Fig. 1 in a larger scale one of the door hinges between longitudinal profiles (profile strips) of the support and door frame as well as a leg spring in the longitudinal profile of the support frame, Fig. 3a and Fig. 3b shows exploded views of the door hinge with two hinge rods with hinge bushings that can be connected via a hinge axis with a mounted helical spring, in a front view and a rear view, respectively, Fig. 4 in a partial exploded view of the door hinge without hinge axis with a view of the hinge bushings of the hinge rods lying next to each other in pairs, Fig. 5 the door hinge in a perspective view, Fig. 6a and Fig. 6b shows a detail of an upper section of the door hinge according to Fig. 5 in different perspective views (front and back view), Fig. 7a to 7c show in different perspective views the leg spring for the detachable and non-destructive mounting of the holding frame in a building opening (door opening), Fig. 8 in front view the door hinge in a second embodiment, Fig. 9 shows a perspective view of a section of the upper section of the door hinge according to Fig. 8 in a partially disassembled state, Fig. 10 shows in perspective the upper section of the door hinge according to Fig. 8, and Fig. 11 in perspective sectional view a section plane XI of the upper section of the door hinge according to Fig. 10. Corresponding parts are provided with the same reference numerals in all figures.

[0032] Fig. 1 shows an insect screen 1 constructed from profile strips. The insect screen door 1, which is particularly designed and configured as a swing door, comprises an inner profile frame as the door frame 2, which is composed of two longitudinal profiles 2a and two transverse profiles 2b in the frame corners. In the exemplary embodiment, the lower transverse profile 2b is wider than the upper transverse profile 2b. The door frame 2 is inserted into an outer frame, referred to below as the holding frame 3, which in the exemplary embodiment is composed of two longitudinal profiles 3a and an upper and a lower transverse profile 3b. The holding frame 3 is inserted into a building opening (door opening or door jamb of a building) and is held (attached) there, preferably non-destructively and detachably.

[0033] The door frame 2 is hinged to the support frame 3 by means of four door hinges 4, which in the exemplary embodiment are also referred to simply as hinges below, and is thus pivotably held in the support frame 3. For this purpose, the door hinges 4 are attached to the mutually facing longitudinal profiles 2a and 3a of the door frame 2 and the support frame 3, respectively. The door frame 2 is stabilized by a central cross brace 5. A mesh fabric 6 is inserted, preferably clamped, into the door frame 2 or in its two door compartments as an insect screen.

[0034] For the detachable and non-destructive mounting of the holding frame 3 in a door opening, in particular on a building door frame, a number of leg springs 7 ( Fig. 7). In the exemplary embodiment, to stabilize the door frame 2 in the lower left corner of the frame, a triangular-shaped retaining profile 8 is expediently attached to one of the longitudinal profiles 2a and to the adjacent (lower) transverse profile 2b of the door frame 2.

[0035] Fig. Figure 2 shows a section of the mutually facing longitudinal profiles 2a, 3b of the door frame 2 and the support frame 3, as well as one of the door hinges 4 and one of the leg springs 7. The longitudinal profile 2a of the door frame 2 has a joining chamber 9 extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot 10. The longitudinal profile 3a of the stationary support frame 3 has a joining chamber 11 extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot 12.

[0036] As in connection with the Fig. 2, Fig. 3a and Fig. 3b, Fig. 4, Fig. As can be seen comparatively clearly in Figures 5 and 6a and 6b, the door hinge 4 has a first hinge rod 13 and a second hinge rod 14. The two hinge rods 13 and 14 are connected in an articulated manner via a hinge axis 15. The hinge axis 15 extends in the axial direction A shown.

[0037] The first hinge rod 13 has two first hinge bushings 13a, 13b spaced axially (in axial direction A) along the hinge axis 15. The second hinge rod 14 also has two second hinge bushings 14a, 14b spaced axially along the hinge axis 15. The hinge bushings 13a and 13b and 14a and 14b are oriented or extend radially in the radial direction R with respect to the hinge axis 15. The hinge axis 15 passes through the aligned hinge bushings 13a, 13b, 14a, 14b of the two hinge rods 13 and 14. The hinge bushings 14a of the second hinge rod 14 are arranged between the hinge bushings 13a of the first hinge rod 13. The hinge bushings 13a, 14a of the two hinge rods 13, 14 abut one another in pairs.

[0038] As in the Fig. 3a and Fig. As illustrated in Figure 3b, the distance a between the hinge bushings 13a of the first hinge rod 13 is greater than the distance b between the hinge bushings 14a of the second hinge rod 14. The distance between the hinge bushings 13a of the first hinge rod 13 corresponds to the distance b between the hinge bushings 14a plus the axial length (height) h of the hinge bushings 14a of the second hinge rod 14.

[0039] The door hinge 4 has a coil spring 16, which is mounted on the hinge axis 15 and arranged between the hinge bushings 14a and 14b of the (second) hinge rod 14. The coil spring 16 has a helically wound or tension spring-like spring rod 16a that coaxially surrounds the hinge axis 15. The coil spring 16 has a bent spring leg 16b on both end faces, which are aligned in opposite axial directions A. The spring legs 16b run partially parallel to the hinge axis 15 and overlap the hinge bushings 13a, 14a as well as 13b and 14b of the first and second hinge rods 13, 14, respectively.

[0040] As from Fig. 4, the spring legs 16b of the helical spring 16 have axial leg sections 17 and, at the ends, curved sections 18 bent at right angles. The curved sections 18 are oriented in the radial direction R and are bent in opposite directions. The curved sections 18 run clockwise or counterclockwise around or coaxial with the hinge axis 15, respectively. The curved sections 18 at least partially encompass the respective hinge bushings 13a of the first hinge rod 13. The helical spring 16 braces the two hinge rods 13 and 14 via their paired hinge bushings 13a, 14a.

[0041] When the insect screen door 1 is (manually) opened, the coil spring 16 of the respective door hinge 4 is tensioned. The door frame 2, pivoted into an open position, is automatically pivoted back into the closed starting position, preferably resting against the support frame, due to the spring return force of the coil spring(s) 16, so that the insect screen door 1 is closed while resting against the support frame 3.

[0042] As can be seen from the Fig. 4 and Fig. 5, the first hinge rod 13 has two spaced-apart joining legs 19 on the hinge rod side facing away from or opposite the respective hinge bushing 13a. The second hinge rod 14 also has spaced-apart joining legs 20 on the hinge rod side facing away from or opposite the respective hinge bushing 14a. The T-slot-like joining legs 19 and 20 are T-shaped in cross-section. The first hinge rod 13 has, in the region of the respective joining leg 19, a joining opening with a threaded pin 21 inserted therein for fastening the door hinge 4 to the longitudinal profile 2a of the door frame 2. The second hinge rod 14 has a joining opening on the respective joining leg 20, into which a threaded pin 21 is inserted for fastening the door hinge 4 to the longitudinal profile 3a of the holding frame 2.

[0043] The door hinge 4 is inserted into the joining chamber 9 of the longitudinal profile 2a of the door frame 2 by means of the joining legs 19 of the first hinge rod 13 and into the joining chamber 11 of the longitudinal profile 3a of the holding frame 3 by means of the joining legs 20 of the second hinge rod 14, preferably from one of the end faces of the respective longitudinal profile 2a, 3a, and is screw-fastened there.

[0044] As can be seen from a summary of the Fig. 3a, Fig. 3b and 6a and 6b, the first hinge rod 13 has, on the circumference of the hinge bushings 13a, 13b, in an intermediate or connecting section 22, an axial spring groove 23 for the axial leg section 17 and a circumferential groove 24 for the curved section 18 of the spring leg 16b of the helical spring 16.

[0045] The second hinge rod 14 has an axial spring groove 25 on the circumference of the hinge bushings 14a, 14b for the axial leg portion 17 of the spring leg 16b of the coil spring 4. This spring groove 25 is aligned with the corresponding axial spring groove 23 of the first hinge rod 13.

[0046] The Fig. 7a to 7c show, in different views, one of the leg springs 7 for the detachable and non-destructive mounting of the retaining frame 3 in a door opening on a building door frame. The respective longitudinal profile 3a of the retaining frame 3 has a joining chamber 26 ( Fig. 1) into which the leg spring 7 can be inserted or is inserted. For this purpose, the leg spring 7 has a fixing leg 7a with a bend 27 on the free end. The leg spring 7 also has a clamping leg 7b with a bent grip section 28 on the free end. The clamping leg 7b with the grip section 28 protrudes from the joining chamber 26 in order to actuate the leg spring 7 and bend the clamping leg 7b open.

[0047] The leg spring 7 further comprises a helical spring-like tension spring rod 7c with, in the exemplary embodiment, five spring coils 29. The fixing leg 7a and the clamping leg 7b are bent or bent off as spring legs on the opposite end faces of the tension spring rod 7c, respectively, from the respective spring coil 29. The leg spring 7 is also seated with the central tension spring rod 7c in the joining chamber 27 of the holding frame 3.

[0048] The following is based on the Fig. 8 to Fig. 11 a second embodiment of the (door) hinge 4 is explained in more detail.

[0049] In this embodiment, the connecting sections 22 each have a threaded bore 30 leading into the respective spring groove 23. An adjusting screw 31, in particular a grub screw, is screwed into the threaded bore 30, which can be brought into contact with a contact surface on the leg section 17, i.e., into mechanical contact, to compensate for any play between the leg spring 16 and the hinge rods 13, 14.

[0050] The threaded hole 30 is oriented perpendicular to the leg section 17. As can be seen particularly in the sectional view of the Fig. As can be seen in Figure 11, the threaded bore 30 is oriented approximately perpendicular to the axial direction A and the radial direction R, i.e., essentially tangentially or straight. The threaded bore 30 is oriented, in particular, perpendicular to the directions of the longitudinal profiles 3a, 2a and transverse profiles 2b, 3b. The threaded bore 30 is oriented, for example, parallel to the circumferential groove 24.

[0051] As also shown in the presentation of the Fig. As can be seen in Figure 11, the adjusting screw 31 has a diameter that is greater than or equal to the diameter of the leg section 17. This ensures that a free-end contact surface of the adjusting screw 21 on the axial leg section 17 is greater than or equal to the leg diameter. This prevents the adjusting screw 31 from slipping during play compensation.

[0052] For better visibility of the adjusting screw 31, the leg spring 16 is shown in the illustrations of the Fig. 10 and Fig.11 is shown axially rotated, so that the leg sections 17 do not fully engage in the spring grooves 23. In an assembled state, however, the leg sections 17 preferably engage in the spring grooves 23, so that the leg section 17 is as fully engaged as possible by a nose (carrier) 32 of the spring groove 23. In the screwed-in state, the adjusting screw 31 presses on the pre-tensioned leg spring 16 in the rest position of the door hinge 4, so that the leg spring 16 or the leg section 17 only lightly rests against the nose 32.

[0053] In summary, the invention relates to an insect screen door 1 with at least one door hinge 4 with a first hinge rod 13 with two spaced-apart first hinge bushings 13a, 13b and with a second hinge rod 14 with two spaced-apart second hinge bushings 14b as well as with a hinge axis 15 passing through the hinge bushings 13a, 13b; 14a, 14b of the hinge rods 13, 14, wherein a helical spring 16 arranged on the hinge axis 15 between the hinge bushings 13a, 13b; 14a, 14b has spring legs 16b running at least in sections parallel to the hinge axis 15, which spring legs each engage over one of the second hinge bushings 14a, 14b and at least partially encompass one of the first hinge bushings 13a, 13b.

[0054] The invention is not limited to the exemplary embodiment described above. Rather, other variants of the invention can also be derived therefrom by those skilled in the art without departing from the scope of the invention. In particular, all individual features described in connection with the exemplary embodiment can also be combined with one another in other ways without departing from the scope of the invention. For example, the leg spring 7 represents an independent invention. List of reference symbols 1 insect screen door 2 door frames 2a Longitudinal profile / profile strip 2b Cross profile / profile strip 3 holding frames 3a Longitudinal profile / profile strip 3b Cross profile / profile strip 4 Door / Hinge 5 cross brace 6 mesh fabric 7 torsion spring 7a Fixing leg 7b clamping leg 7c tension spring rod 8 Holding profile 9 Joining chamber 10 Longitudinal slot 11 Joining chamber 12 Longitudinal slot 13 first hinge rod 13a Hinge bushing 13b Hinge bushing 14 second hinge rod 14a Hinge bushing 14b Hinge bushing 15 Hinge axis 16 coil spring 16a spring rod 16b Spring leg 17 leg section 18 arch section 19 leg 20 leg joints 21 threaded pin 22 Intermediate / connecting section 23 Spring groove 24 circumferential groove 25 spring groove 26 joining chamber 27 Offset / Crank 28 Handle section 29 spring coils 30 threaded hole 31 Adjusting screw 32 Nose a, b distance h Length / Height A axial direction R Radial direction QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This 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

[0000] DE 10 2012 018 077 A1

[0002] DE 100 34 071 A1

[0003] DE 10 2019 207 938 B4

[0004]

Claims

[1] Insect screen door (1), comprising - a pivotable door frame (2) composed of longitudinal profiles (2a) and transverse profiles (2b), wherein at least one of the longitudinal profiles (2a) has a joining chamber (9) extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot (10), - a holding frame (3) with at least one longitudinal profile (3a) with a joining chamber (11) extending in the longitudinal direction of the profile, which is accessible via a longitudinal slot (12), - at least one door hinge (4) with a first hinge rod (13) with two spaced first hinge bushings (13a, 13b) and with a second hinge rod (14) with two spaced second hinge bushings (14b) and with a hinge axis (15) passing through the hinge bushings (13a, 13b; 14a, 14b) of the hinge rods (13, 14), and - a helical spring (16) arranged on the hinge axis (15) between the hinge bushings (13a, 13b; 14a, 14b) with spring legs (16b) running at least in sections parallel to the hinge axis (15), which spring legs each engage over one of the second hinge bushings (14a, 14b) and at least partially encompass one of the first hinge bushings (13a, 13b). [2] Insect screen door (1) according to claim 1, characterized by that the distance (a) between the hinge bushings (13a, 13b) of the first hinge rod (13) is greater than the distance (b) between the hinge bushings (14a, 14b) of the second hinge rod (14). [3] Insect screen door (1) according to claim 1 or 2, characterized by that the hinge bushings (14a, 14b) of the second hinge rod (14) are arranged between the hinge bushings (13a, 13b) of the first hinge rod (13). [4] Insect screen door (1) according to one of claims 1 to 3, characterized bythat the hinge bushings (14a, 14b) of the first hinge rod (14) and the hinge bushings (13a, 13b) of the second hinge rod (13) abut one another in pairs. [5] Insect screen door (1) according to one of claims 1 to 4, characterized by that the helical spring (16) has a helically wound, in particular tension spring-like, spring rod (16a) which coaxially surrounds the hinge axis (15), in particular between the hinge bushings (14a, 14b) of the second hinge rod (14). [6] Insect screen door (1) according to one of claims 1 to 5, characterized by that the spring legs (16b) of the helical spring (16) are aligned axially opposite to one another. [7] Insect screen door (1) according to one of claims 1 to 6, characterized bythat the spring legs (16b) of the helical spring (16) have an axial leg section (17) and an arc section (18) which is bent at an angle, in particular at a right angle, to the end thereof and which at least partially encompasses the respective hinge bushing (13a, 13b) of the first hinge rod (13). [8] Insect screen door (1) according to one of claims 1 to 7, characterized by that the first hinge rod (13) has, on the circumferential side of the hinge bushings (13a, 13b), an axial spring groove (23) for an axial leg section (17) and a circumferential groove (24) for an arc section (18) of the spring leg (16b) of the helical spring (16). [9] Insect screen door (1) according to one of claims 1 to 8, characterized bythat the second hinge rod (14) has, on the circumferential side of the hinge bushings (14a, 14b), an axial spring groove (25) for an axial leg section (17) of the spring leg (16b) of the helical spring (16), in particular aligned with a corresponding axial spring groove (23) of the first hinge rod (13). [10] Insect screen door (1) according to one of claims 7 to 9, characterized by in that the first hinge rod (13) and the second hinge rod (14) each have, in the region of the hinge bushings (13a, 13b), a threaded bore (30) for an adjusting screw (31), which extends in particular tangentially to the respective hinge bushing (13a, 13b) and is open in the direction of the axial leg section (17), wherein the adjusting screw (31), in a screwed-in state, realizes a play or tolerance compensation between the helical spring (16) and the respective hinge rod (13). [11] Insect screen door (1) according to claim 10, characterized bythat a contact surface of the adjusting screw (31) on the axial leg section (17) is dimensioned substantially greater than or equal to a diameter of the axial leg section (17). [12] Insect screen door (1) according to one of claims 1 to 11, characterized by , - that the first hinge rod (13) has at least one joining leg (19), preferably on the side of the hinge rod facing away from the first hinge bushing (13a, 13b), and / or - that the second hinge rod (14) has at least one joining leg (20), preferably on the side of the hinge rod facing away from the second hinge bushing (14a, 14b), - wherein the joining leg (19, 20) of the first or second hinge rod (13, 14) is designed in the manner of a slotted nut, in particular T-shaped or double-T-shaped in cross-section, and / or - wherein the joining leg (19, 20) of the first or second hinge rod (13, 14) has at least one joining opening with a threaded pin (21), and / or - wherein the joining leg (19, 20) of the first or second hinge rod (13, 14) is inserted into the joining chamber (11) of the longitudinal profile (2a) of the door frame (2), and / or - wherein the joining leg (19, 20) of the second or the first hinge rod (13, 14) is inserted into the joining chamber (11) of the longitudinal profile (2a) of the holding frame (3). [13] Insect screen door (1) according to one of claims 1 to 12, characterized byin that for the detachable and non-destructive mounting of the holding frame (3) in a door opening, in particular on a building door frame, a leg spring (7) is inserted into the or each longitudinal profile (3a) of the holding frame (3), wherein the leg spring (7) has a fixing leg (7a) which is insertable or inserted into a joining chamber (26) of the holding frame (3) and a clamping leg (7b) protruding from the joining chamber (25), and between the fixing leg (7a) and the clamping leg (7b) a helical spring, in particular a tension spring rod (7c) with a number of spring coils (29). [14] Door hinge (4) for an insect screen door (1), in particular according to one of claims 1 to 13, comprising - a hinge axis (15), - a first hinge rod (13) with two axially spaced first hinge bushings (13a, 13b) along the hinge axis (15), - a second hinge rod (14) with two axially spaced second hinge bushings (14a, 14b) along the hinge axis (15), which are aligned with the first hinge bushings (13a, 13b) of the hinge rods (13) and are penetrated by the hinge axis (15), and - a helical spring (16) arranged on the hinge axis (15) between the hinge bushings (13a, 13b; 14a, 14b) with spring legs (16b) running at least in sections parallel to the hinge axis (15), which spring legs each engage over one of the hinge bushings (14a, 14b) of the second hinge rod (14) and at least partially encompass one of the hinge bushings (13a, 13b) of the first hinge rod (13).

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