Winding arrangement and method for producing such a winding arrangement

Abstract

Method for producing a winding arrangement (1) for a protective device (S) of a motor vehicle (P), comprising a dimensionally stable winding shaft (2) and a flexible winding web (3) held on the winding shaft (2) in a manner that can be wound up and unwound, comprising the steps: Winding (W) a first section (A1) of a flexible sheet (4); Stabilizing the shape (F) of the wound first section (A1); wherein the dimensionally stable winding shaft (2) is formed by the dimensionally stabilized wound first section (A1) of the flexible sheet material (4), and wherein the flexible winding track (3) is formed by a second section (A2) of the flexible sheet (4) adjoining the first section (A1), whereby the winding shaft (2) and the winding track (3) are formed integrally.

Description

The invention relates to a winding arrangement for a protective device of a motor vehicle, having a dimensionally stable winding shaft and a flexible winding web held on the winding shaft such that it can be wound and unwound. The invention also relates to a method for producing such a winding arrangement.Such a winding arrangement is known, for example, from DE 10 204 331 A1 and is provided for a protective device in the form of a side window roller blind of a motor vehicle. The known winding arrangement has a tubular winding shaft and a flexible winding web held on the winding shaft such that it can be wound up and unwound. To produce the winding arrangement, the winding shaft is composed of two channel-shaped elements. The flexible winding web is fastened with an edge to an outer surface of the winding shaft.A further winding arrangement is known from DE 10 2009 035 426 A1, wherein the winding shaft is formed in different ways in different configurations of the winding arrangement, for example from foam material, as a hollow body, film structure or piping rod with piping lug. In one embodiment, the winding shaft is arranged in a pocket which is arranged at one end on the flexible sheet-like structure. In addition, a configuration is described in which the pocket itself is intended to form the winding shaft.It is the object of the invention to provide a winding arrangement and a method of the type mentioned at the beginning which offer advantages over the prior art and in particular make possible a simplified structure and a simplified production.To achieve this object, the invention provides a method with the features of claim 1 and a winding arrangement with the features of claim 9. Advantageous embodiments are the subject matter of the dependent claims.The method according to the invention comprises the steps of: winding up a first section of a flexible sheet material; shape-stabilizing the wound-up first section; wherein the shape-stable winding shaft is formed by the shape-stabilized wound-up first section of the flexible sheet material, and wherein the flexible winding web is formed by a second section of the flexible sheet material adjoining the first section, whereby the winding shaft and the winding web are formed integrally continuously. The solution according to the invention makes it possible in particular to dispense with a separate fastening of the winding web to the winding shaft. This simplifies production, wherein in particular corresponding joining connections between the winding shaft and the winding web can be dispensed with. In this way, a simplified construction and a comparatively lower weight of the winding arrangement can be achieved. This brings with it further advantages with regard to a mounting on the motor vehicle side on the one hand and logistics processes upstream of the mounting on the other hand. The first section and the second section of the flexible sheet are sections of one and the same blank of the flexible sheet. The first section is preferably wound onto a winding core. Alternatively, the first section is rolled up at the edge and wound onto itself, as it were. The shape-stabilizing of the first section can be effected in the widest sense by force, form and / or material bonding. The shape-stabilizing can comprise a plurality of steps, wherein, for example, a step is carried out before the winding and a further step is carried out after the winding of the first section. Alternatively or additionally, a further step of shape-stabilizing can be carried out during the winding. The flexible sheet material is preferably a textile sheet material, for example a woven fabric, a knitted fabric, a knitted fabric, a nonwoven fabric or a felt. Preferably, the flexible sheet is made of a plastic material. A production from a thermoplastic material is preferred, particularly preferably from polyethersulfone, which is familiar under the abbreviation PES.In one embodiment of the invention, the shape-stabilizing comprises a cohesive joining together of superposed winding layers of the wound-up first section. The materially integral joining can be implemented particularly easily from a manufacturing standpoint. This in particular in comparison with a fundamentally conceivable non-positive and / or positive shape stabilization of the wound first section, such as by sewing the winding layers lying on top of one another. The winding layers lying one on top of the other can be joined together in a materially integral manner without the use of an additive, provided that the flexible sheet material has corresponding properties and can be liquefied, for example, under the action of heat and / or pressure. Alternatively, the winding layers laid one on another may be joined together using an additive, for example, an adhesive, a solvent, or the like. Preferably, the material-bonded joining takes place in a planar manner, in particular over the entire surface. Alternatively or additionally, a point-shaped and / or line-shaped joining can be effected.In a further embodiment of the invention, the shape-stabilizing comprises adhesive bonding, welding and / or fusing of superposed winding layers of the wound-up first section. The adhering preferably comprises applying an adhesive, a solvent or the like to the first portion. The application can take place in the non-wound and / or wound state of the first section. If an adhesive is applied, the adhesive bonding comprises curing the adhesive in the wound state of the first section. If a solvent is applied, the adhesive bonding comprises a surface partial dissolution of the first section and a surface curing and / or setting with formation of an adhesive bond between the winding layers lying one on top of the other. If welding is effected, the flexible sheet-like structure is preferably manufactured from a weldable material, in particular from a thermoplastic plastic material. The welding can be effected in a point and / or line shape. The welding can be effected by means of friction welding, in particular by means of ultrasonic welding. If fusion is effected, the flexible sheet material is preferably manufactured from a thermoplastic material.In a further embodiment of the invention, the shape-stabilizing comprises pressing the wound-up first section. The pressing serves for improved shaping of the wound-up first section and permits a tolerance-compliant configuration of the winding shaft. The pressing may comprise placing the wound-up first portion in a press mold having a corresponding negative shape. Pressing can be effected under the influence of heat and / or radiation.In a further embodiment of the invention, the shape-stabilizing comprises applying a polymerizable substrate to the first section and curing the first section provided with the polymerizable substrate and wound up. The inventors have recognized that this embodiment of the invention offers particular advantages and in particular enables a simplified production once again. The polymerizable substrate is preferably applied to the first section in liquid, viscous and / or pasty form. This can take place before and / or after the winding. Particularly preferably, the polymerisable substrate is applied in liquid form to the wound-up first section, wherein the latter is impregnated with the polymerisable substrate. During the curing of the first section, the substrate is polymerized. Here, expressed in simplified terms, a plastic is synthesized. Since the polymerizable substrate is applied to the first portion, it is stabilized in its wound form due to the polymerization. In other words, it is also possible to refer to hardening or stiffening. For the purposes of this invention, the term "polymerization" comprises, in particular, polymerization, polyaddition and polycondensation reactions.In a further embodiment of the invention, the curing comprises exposure, in particular by means of UV light, of the first section provided with the polymerizable substrate and wound up. This can reduce the time required for curing and achieve an even simplified production. In addition, the curing can take place particularly uniformly. This offers advantages with regard to the achievable mechanical properties of the winding shaft.In a further embodiment of the invention, the method comprises the step of: cutting the flexible sheet-like structure to size, wherein the first portion is cut to size to form a non-parallel-edged, in particular trapezoidal, first basic shape and / or wherein the second portion is cut to size to form a non-parallel-edged, in particular trapezoidal, second basic shape. Due to the non-parallel boundary of the first section, a conical winding shaft can be formed in particular. This allows in particular winding and unwinding of the flexible winding web along a direction oriented non-orthogonally to a rotational axis of the winding shaft. In the prior art, the formation of conical winding shafts takes place with comparatively high outlay, since, for example, extrusion of conical winding shafts is not possible. The invention offers particular advantages in this context. By means of the non-parallel boundary of the second section, the unwound shape of the flexible winding web can be adapted in a particularly simple manner to a vehicle-side geometry to be covered and / or separated, for example to a vehicle window, a cargo space opening or the like. By means of this embodiment of the invention, the geometric properties of the winding shaft and of the winding web can be adapted to a wide variety of vehicle-side installation situations by simply adapting the blank of the flexible sheet-like structure. This allows a significant simplification and flexibility of the production and construction of the winding arrangement.In a further embodiment of the invention, the first section is wound onto a cylindrical winding core, wherein the winding core is removed from the winding shaft after the shape-stabilizing. As a result, a tubular winding shaft can be formed in a simple manner. By winding on the cylindrical winding core, a particularly dimensionally stable inner contour of the winding shaft can be achieved. This is advantageous in particular with regard to installing further components of the winding arrangement in the winding shaft. The winding core is preferably made of an elastomeric material, in particular silicone. This allows in particular easy and reliable removability of the winding core after the winding shaft has been dimensionally stabilized. If the winding core is made of silicone, it can additionally serve as a light guide for exposing the wound-up first section for the purpose of curing. This is particularly advantageous.The winding arrangement according to the invention provides that the winding shaft is formed by a dimensionally stable wound first section of a flexible sheet material and that the flexible winding web is formed by a second section of the flexible sheet material adjoining the first section, whereby the winding shaft and the winding web are formed integrally continuously. With regard to advantages associated with the solution according to the invention, reference is made to the preceding description of the method according to the invention. The statements made there correspondingly also apply to the winding arrangement according to the invention. Advantageous embodiments of the winding arrangement according to the invention are derived analogously from the features of the embodiments of the method according to the invention.The invention also relates to a protective device for a motor vehicle having a winding arrangement according to the preceding description. The protective device is preferably provided for an interior of the motor vehicle. The protective device is preferably a shading device or a separating device. The shading device can be configured to shadow a side window, rear window or roof opening of the motor vehicle. The separating device can be configured to separate and / or cover a cargo space of the motor vehicle.Further advantages and features of the invention are evident from the claims and from the following description of a preferred exemplary embodiment of the invention, which is illustrated on the basis of the drawings. FIG. 1 shows a schematic perspective illustration of an embodiment of a protective device according to the invention for a motor vehicle, which is provided with an embodiment of a winding arrangement according to the invention, FIGS. 2 to 5 are schematically simplified representations to illustrate an embodiment of a method according to the invention for producing the winding arrangement according to FIG. 1, FIG. 6 is a schematic perspective view of the winding arrangement produced by means of the method according to FIGS. 2 to 5; and FIG. 7 shows a further schematic illustration for illustrating the production method.According to FIG. 1, a protective device S is provided for shading a roof opening, not designated in more detail, arranged in a roof region D of a passenger car P. The protective device S can thus also be referred to as a shading device. In embodiments not shown in the drawings, the shading device is configured to shadow a side or rear window opening of the passenger car P. In further embodiments, not shown, the protective device can be configured as a cargo space cover or cargo space separation network of the passenger car P.The protective device S has a winding arrangement 1 with a dimensionally stable winding shaft 2 and a flexible winding web 3 held on the winding shaft 2 such that it can be wound up and unwound. The winding shaft 2 is mounted rotatably fixed to the vehicle about an axis of rotation oriented parallel to a vehicle transverse axis. In the embodiment shown, the winding shaft 2 is arranged in the region of a rear edge of the roof opening, which rear edge is not designated in any more detail. The winding web 3 can be wound and unwound by means of a rotation of the winding shaft 2 and in this way can be displaced between a protection position and a release position. The protective position can also be referred to herein as a shading position and is shown with reference to FIG. 1. In the shading position, the unwound winding web 3 covers the roof opening, so that an interior of the passenger car P is shaded to this extent. In the release position, the winding web 3 is wound on the winding shaft 2.In order to achieve a particularly simple production and a particularly simple structure of the winding arrangement 1, the winding shaft 2 is formed by a dimensionally stabilized wound first section A 1 of a flexible sheet-like structure 4 (cf. in particular FIGS. 2, 6 ). The flexible winding web 3 is formed by a second section A 2 of the flexible sheet material 4 adjoining the first section A 1. As a result, the winding shaft 2 and the winding web 3 are integrally formed continuously. With reference to FIG. 2, the first and second sections A 1, A 2 are separated from one another in the drawing by means of a dash-dotted line. It will be appreciated that the first and second portions are nevertheless integrally contiguous.A method for producing the winding arrangement 1 comprises a plurality of steps illustrated with reference to FIGS. 2 to 5 and 7.In the present case, a cutting Z of the flexible sheet material 4 is initially carried out. The cutting Z can be carried out, for example, starting from a roll or meter product. Alternatively, the flexible sheet material 4 can already be obtained in a prefabricated manner, so that cutting Z to size is not absolutely necessary. In this respect, the cutting step Z is advantageous, but not essential, with regard to the solution according to the invention.The flexible sheet-like structure 4 shown (cut to size) with reference to FIG. 2 is matched dimensionally and with regard to its basic shape to the geometric properties of the winding shaft 2 to be achieved or produced, on the one hand, and on the other hand, to the winding web 3.In the embodiment shown, the flexible sheet-like structure 4 with its two sections A 1, A 2 has a rectangular basic shape with a width b and a length l. The width b of the flexible sheet-like structure 4 is matched to a length of the winding shaft 2 along its longitudinal axis L (FIG. 6 ) that is to be achieved and is not designated in more detail. The length l of the flexible sheet 4 comprises a first length l1 of the first section A1 and a second length l2 of the second section A2. The first length l1 is matched to a diameter of the winding shaft 2 to be produced. The second length l2 is matched to a length of the flexible winding web 3 to be produced in the unwound state.In the embodiment shown, the first section A 1 has a first basic shape G 1. The second section A 2 has a second basic shape G 2. The first and second basic shapes G 1, G 2 are each rectangular in shape or cut to size in the embodiment shown.Alternatively, both sections A 1, A 2 can each be cut to size to form a non-parallel, in particular trapezoidal, basic shape. This is illustrated by the alternative second basic shape G2' shown in dashed lines. By appropriate cutting of the second section A 2, it is possible in a simple manner to achieve a simple adaptation of the winding web on the production side to different installation situations on the motor vehicle side with different geometries to be covered and / or separated. By means of a non-parallel blank of the first section A 1, a conical winding shaft can be formed in a simple manner. In this context, the reference symbol G1' is also to be understood.After the cutting Z, the first section A 1 is wound up W (FIG. 7 ). After winding W, the flexible sheet material 4 assumes a configuration schematically illustrated with reference to FIG. 3. In the embodiment shown, the first section A 1 is wound onto a cylindrical winding core 5. The winding core 5 is longer than the width b of the flexible sheet 4. in the embodiment shown, the winding core 5 is oriented parallel to a rear edge 6 of the flexible sheet 4 for winding up the first section A 1. However, this is not obligatory. In principle, "oblique" winding is also conceivable. An outer contour 7 of the winding core 5 specifies an inner contour 8 of the winding shaft 2 to be formed (FIG. 6 ). The winding shaft 2 is correspondingly tubular in the present case with a cylindrical inner contour for possibly receiving further components of the winding arrangement 1, for example a spring motor or the like. The second portion A 2 is not wound up to form the winding shaft 2 and the winding web 3. In the wound state of the first section A 1, the latter forms a plurality of winding layers WS lying one on top of the other (FIG. 3 ). A number of winding layers WS is matched to the diameter of winding shaft 2 to be achieved and is also directed to a thickness of flexible sheet material 4, which thickness is not designated in any more detail.In the embodiment shown, the flexible sheet-like structure 4 is a knitted fabric manufactured from a plastic material K. The plastic K is polyester (PES) in the present case.For forming the cylindrical shaft 2, the first portion A 1 is stabilized in its wound shape. In other words, a shape-stabilizing F (FIG. 7 ) of the wound-up first section A 1 (FIG. 3 ) takes place. The shape-stabilizing F can basically take place in a form-fitting, force-fitting and / or materially integral manner. In the embodiment shown, a cohesive joining together of the winding layers WS of the wound-up first section A 1 lying one on top of the other is provided for this purpose.In further embodiments, for example, adhesive bonding, welding and / or fusing of the winding layers WS lying one on top of the other is provided.In the embodiment shown, the shape-stabilizing F comprises a plurality of steps:In a step F 1, a polymerizable substrate PS is applied to the first portion A 1. Different methods and different substrates are conceivable for this purpose. In the present case, the first section A 1 is impregnated with the polymerizable substrate PS in the wound state. Accordingly, the substrate PS is present in flowable, preferably liquid, form. The polymerizable substrate in the present case is UV-curing epoxy resins.In a further step F 2, the wound-up first section A 1 impregnated with the substrate PS is pressed (FIG. 4 ). The pressing F 2 is effected in the present case by means of a jaw mold 9, 10 having an upper mold jaw 9 and a lower mold jaw 10. The jaw mold 9, 10 accordingly has an inner contour, not shown in detail, which forms a negative shape with respect to the outer contour of the winding shaft 2 to be achieved. Pressing F2 can be effected under the action of heat and / or radiation.In a further step F 3, the first section A 1 provided with the polymerizable substrate PS and wound up is cured. The curing F 3 is schematically illustrated with reference to FIG. 5 and takes place in the present case by exposure of the wound-up first section A 1 impregnated with the substrate PS. The exposure is effected by means of a light source 11, which is shown in a schematically greatly simplified manner and is in the present case a UV light source. It is understood that the curing F 3 can take place after and / or during the pressing F 2. In order to illustrate curing F 3 during pressing F 2, the wound-up first section is still accommodated in the jaw mold 9, 10 during curing with reference to FIG. 5. Accordingly, the light source 11 may be integrated into the jaw mold 9, 10, for example. Alternatively, the curing F 3 can take place after removing the first section A 1 from the jaw mold 9, 10.During curing, a chemical reaction of the substrate PS occurs, by means of which the first section A 1 is stabilized in its wound shape, forming the winding shaft 2 (FIG. 6 ). In this context, the stabilization can also be referred to as fixing, stiffening and / or hardening.After curing F 3 and removal from the jaw mold 9, 10, the winding core 5 is removed from the winding shaft 2. The winding core 5 is manufactured from a silicone material. This ensures easy and reliable removability. In addition, the winding core 5 made of the silicone material functions in the present case as a light guide for exposing or curing the polymerizable substrate PS. That is, the wound first portion A 1 is exposed from the inside via the winding core 5.

Claims

Method for producing a winding arrangement (1) for a protective device (S) of a motor vehicle (P), having a dimensionally stable winding shaft (2) and a flexible winding web (3) held on the winding shaft (2) such that it can be wound up and unwound, having the steps: winding (W) a first section (A1) of a flexible sheet material (4); dimensionally stabilizing (F) the wound first section (A1); wherein the dimensionally stable winding shaft (2) is formed by the dimensionally stable wound first section (A1) of the flexible sheet material (4), and wherein the flexible winding web (3) is formed by a second section (A2) of the flexible sheet material (4) adjoining the first section (A1), as a result of which the winding shaft (2) and the winding web (3) are formed integrally continuously.Method according to claim 1, wherein the shape-stabilizing (F) comprises: materially joining together winding layers (WS) of the wound-up first section (A1) lying one on top of the other.Method according to claim 1 or 2, wherein the shape-stabilizing (F) comprises: adhesive bonding, welding and / or fusing of winding layers (WS) of the wound-up first section (A1) lying one on top of the other.Method according to any one of the preceding claims, wherein the shape-stabilizing (F) comprises: pressing (F2) the wound-up first portion (A1).Method according to one of the preceding claims, wherein the shape-stabilizing (F) comprises: applying (F1) a polymerisable substrate (PS) to the first section (A1) and curing (F3) the first section (A1) provided with the polymerisable substrate (PS) and wound up.Method according to claim 5, wherein the curing (F3) comprises: exposing, in particular by means of UV light, the first section (A1) provided with the polymerisable substrate (PS) and wound up.Method according to one of the preceding claims, comprising the step of: trimming (Z) the flexible sheet-like structure (4), wherein the first section (A1) is trimmed to form a non-parallel-bordered, in particular trapezoidal, first basic shape (G1'), and / or wherein the second section (A2) is trimmed to form a non-parallel-bordered, in particular trapezoidal, second basic shape (G2').Method according to one of the preceding claims, wherein the first section (A1) is wound onto a cylindrical winding core (5), wherein the winding core (5) is removed from the winding shaft (2) after the shape-stabilizing (F).Winding arrangement (1) for a protective device (S) of a motor vehicle (P), having a dimensionally stable winding shaft (2) and a flexible winding web (3) held on the winding shaft (2) such that it can be wound up and unwound, characterized in that the winding shaft (2) is formed by a dimensionally stable wound first section (A1) of a flexible sheet material (4), and in that the flexible winding web (3) is formed by a second section (A2) of the flexible sheet material (4) adjoining the first section (A1), as a result of which the winding shaft (2) and the winding web (3) are formed integrally continuously.Protective device (S) for a motor vehicle (P) having a winding arrangement (1) according to Claim 9.

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