DE20306825U1 - Protective hood for motor vehicles - Google Patents

Description

Mammel and burrow

Patent attorneys

European Patent and Trademark Attorneys

Ulrike Mammel, Dipl.-Chem., Dr. rer. nat

Jochen Maser, Dipl.-Ing.

Tilsiter Strasse D-71065 Sindelfingen Tel. +49(0)7031/81944-0 Fax +49(0)7031/81944-55 info@mammelmaser.de www.mammelmaser.de

VAT ID No. DE813356290

Our reference: 13 687 Date: April 30, 2003

Applicant: Heinrich Heiland GmbH, Nelkenstraße 1-6, 71106 Magstadt

Protective cover for motor vehicles

The invention relates to a protective hood for motor vehicles, motor vehicle parts, machines or the like according to the preamble of claim 1.

Such protective covers for motor vehicles, machines or the like are specially designed for the preventive protection of surfaces against abrasive or chemical emissions, such as dust, rust, bird droppings, condensation and dust moisture and penetrating moisture, as well as against mechanical damage, such as scratching and grinding damage and resulting damage during downtime, storage and transport.

Protective covers made of plastic or plastic-coated textile tarpaulins have become known, in which motor vehicles, machines and other objects to be protected are wrapped, whereby the tarpaulin

Date created 04.12.2002 15:22

cover is attached by additionally attaching adhesive strips or lashed with lines or ropes. Such a protective cover is known, for example, from DE 199 04 140 Al. These tarpaulins are characterized by the fact that during transport the airflow causes them to lift or swell depending on the speed. This leads to the ballooning or fluttering of the covering material and thus to mechanical stress, in particular on the surface of the object to be protected and to damage to it.

The flexible packaging for a motor vehicle known from DE 199 04 140 A1 comprises a protective cover made of an elastic material that is shaped to fit the motor vehicle to be packaged, which reaches under the entire vehicle up to the lower edge and can be clamped to the body using tensioning cables that engage its edges. In the area of the wheel arches, cutting areas are provided that do not cover the front wheel cutouts. In the rear area, the cover is completely covered.

This protective cover in the area of the wheel arches has the disadvantage that air can flow directly under the packaging of the front wheel cutouts during the journey and thus inflate the protective cover. In the rear section, the complete coverage has the disadvantage that the rear wheels are not accessible, for example to refill the tires with air or to change a wheel. In addition, the protective cover in this area is not designed to fit tightly to the vehicle. This means that the wind can also penetrate this area, causing the material to inflate and hit the vehicle surface during transport, which in turn leads to surface damage.

The invention is therefore based on the object of creating a protective cover which optimally protects the object to be protected over its entire surface and is adaptable to different surface shapes, in particular wheel arches, ensures that the protective cover fits securely during transport and enables the protective cover to be easy to handle and to be used at least once.

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This object is achieved according to the invention by a protective hood for motor vehicles, motor vehicle parts, machines or the like with the features of claim 1. The dependent claims relate to advantageous embodiments and further developments of the invention.

The inventive design of at least one flat strip-shaped holding element in a pocket, which is provided on the protective hood and is each assigned to the edge(s), makes it possible for these holding elements to engage the edge(s) under pre-tension in a holding position. The holding element, which engages the edge of the object to be protected under pre-tension, automatically pulls or fixes the cover that borders the edge of the object to be protected. This prevents air from getting under the protective hood in this area during travel, which prevents the hood material from swelling up and impacting, at least in the area of the edge.

According to a preferred embodiment, the edges are provided on the object to be protected at the wheel arches and/or a hood edge close to the windshield. This allows these areas to fit tightly against the object to be protected.

Furthermore, this design has the advantage that the holding elements are self-centering relative to the wheel arch or the edge of the hood, which improves the shape adaptation of a protective hood to the geometry of the wheel arch or the edge of the hood, as well as to other geometries of objects to be protected which have a circular, curved, elliptical shape or the like.

Furthermore, the invention has the advantage that the engagement of the flat strip-shaped retaining element on the wheel arches or the edge of the bonnet enables versatile and flexible use, since this engagement on the wheel arches or the bonnet is possible independently of the boxes or covers formed behind them, which connect to the wheel arch or the edge of the bonnet.

According to an advantageous embodiment of the invention, the width of the flat strip-shaped retaining elements is greater than the edge or beading of the wheel arches or the edge of the hood. This enables the protective hood to be positioned securely without it coming loose due to air flowing behind it. At the same time, the retaining element is aerodynamically positioned on the wheel arch or the hood.

In its preferred embodiment, the radius of curvature of the flat strip-shaped retaining element is larger than the radius or curvature of a wheel arch or the edge of the bonnet. This enables the retaining element to be positioned under pre-tension after positioning in a section of the protective hood adjacent to the wheel arch or the edge of the bonnet. A folding effect1: for fixing the retaining elements to the edge or the wheel arch and/or the edge of the bonnet is achieved. When the protective hood is pulled on, the flat strip-shaped retaining element protrudes outwards at an angle to the edge. By moving the retaining element inwards towards the edge, the retaining element folds or snaps over, whereby the retaining element rests against the edge under pre-tension in a position directed towards the inside of the edge and engages it. This folding effect is achieved by reducing the radius of curvature of the retaining element compared to its original shape when installed on the protective hood and the holding force is generated.

It is advantageously provided that when the holding force is increased by pre-tensioning the flat strip-shaped holding element in the protective hood, the difference between the radius of curvature of the holding element and the curvature of the wheel arch or the edge of the hood is increased. This means that even at higher speeds during transport, such as on a train or when the vehicle is travelling from one loading point to the next, the protective hood is securely in place, at least in the fastening section.

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The holding element is preferably produced by punching, milling, injection molding, deep drawing, extrusion or calendering. Any materials with flexible properties can be used. Plastic materials produced by a punching process are preferred.

The folding effect for achieving the holding force on the wheel arches or the edge of the hood is preferably achieved by a flat rectangular cross-section. The width of the holding element is a multiple of its strength or thickness. Preferably, strip-shaped material is provided so that the structure in the protective hood is also kept small.

According to a preferred embodiment, the flat strip-shaped holding element is completely inserted into a pocket. The holding element is in a rest position without any force being applied to change the shape.

The pocket for accommodating at least one holding element is preferably made of a material corresponding to the protective cover. Its contour is adapted to the geometry of the holding element and is preferably slightly larger, so that in a preferred embodiment the pocket surrounds the holding element relatively tightly.

In a preferred embodiment, the pocket for receiving the at least one holding element is closed by sewing, welding or gluing.

According to a preferred embodiment, the sewing, welding or gluing is carried out by a CNC-controlled device. For example, a layer of a material web or a pre-cut material web for each holding element is applied to a processing table. The holding element is then positioned to the first layer. A second layer is positioned analogously to the first layer in order to then close the pocket using a tool by sewing, welding or gluing.

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A preferred embodiment of the invention provides that the holding element is designed in two or more parts. This design has the advantage that, in automatic production, for example by punching, milling or the like, material-optimized production of the holding elements and a reduction in waste is possible. The holding elements usually have a curvature that is adapted to the contour of the wheel arch or the edge of the hood of a respective motor vehicle, namely at the time when the holding element is stored in the pocket and attached to the protective hood. As a result, different radii and curvatures can occur in a rest position along an outer line of the flat strip-shaped holding element, whereby the distance between the holding elements in order to punch out several holding elements from a preferably plate-shaped material is sometimes considerable. The holding elements are therefore at least halved in order to obtain a large number of holding elements from a given plate size and, for example, to keep the number of workers during punching to a minimum, which in turn can reduce costs for the machines. Furthermore, this two- or multi-part design of the holding elements has the advantage that smaller individual pockets can be formed, whereby the processing areas of automatic machines can be kept small, so that the investment costs for the production of the holding elements are kept low.

The multi-part holding element has a dividing line between the individual sections. This is advantageously provided in such a way that sections of equal size are provided, or the dividing line is provided at regular intervals over the entire length of the holding element. This can optimize the manufacturing process. In addition, symmetries can be created which support the holding function.

According to a preferred embodiment, a two-part holding element is provided, the dividing line of which is provided at the apex of the wheel arch. This allows a small packing size to be achieved, at least when not in use.

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According to a further advantageous embodiment of the invention, each half of the holding element is inserted into a separate pocket. This enables cost-effective mass production.

Alternatively, it is also advantageously provided that each half of the holding element is inserted or placed in a common pocket and a seam is provided in the area of the dividing line. This ensures that the halves are positioned relative to one another in the pocket in order to form a virtually continuous holding element.

Furthermore, according to an alternative design of the two-part holding element, a positive, non-positive and/or material-locking connection of the two halves is provided before inserting a first and second half of the holding element into a common tab. This positive, non-positive and/or material-locking connection naturally also applies to multi-part holding elements consisting of a first and at least one further section, which can be the same or different in size, shape and material.

After inserting the holding element or the sections of the holding element into the pocket or pockets, the pocket or pockets are arranged on a protective hood section that is adapted to the course of a wheel arch or the edge of the hood or to its outer contour. With this arrangement, the holding element is moved out of its rest position by reducing the distance between the two free ends, whereby the flat strip-shaped holding element is positioned at an angle. This creates the pre-tension. Due to the flexurally elastic properties and the thickness of the strip-shaped holding element, which is many times smaller than the width of the holding element, it can be easily folded over from a non-use position to a holding position and vice versa, and sufficient holding force can be achieved in a holding position.

The invention and further advantageous embodiments and developments thereof are described and explained in more detail below with reference to the example shown in the drawing. The description

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The features shown in the drawing can be used individually or in combination in accordance with the invention. They show:

Figure 1 A perspective view of a motor vehicle

with a protective cover,

Figure 2 is a schematic representation of a bag

arranged holding element,

Figure 3 is a schematic representation of a bag

arranged holding element, which is arranged on the protective hood in the cutting area for a wheel arch,

Figure 4 is a schematic representation of a holding element

in a non-engaged position along line IV IV in Figure 1,

Figure 5 is a schematic sectional view of a holding

element in a holding position along the line IV - IV in Figure 1,

Figure 6 is a schematic representation of a two-part

holding element,

Figure 7 is a schematic representation of a section of a

of a holding element during production in multiple use,

Figure 8 a is a schematic representation of sections of the holding elements when inserted into pockets during automatic production,

Figure 8 b is a schematic sectional view along the line VIII - VIII in Figure 8 a,

Figure 9 is a schematic representation of two-part Hal

te elements in a bag and

Figure 10 shows an alternative embodiment of two-part holding elements in a pocket.

Figure 1 shows a protective hood 11 which is fitted onto a motor vehicle. This protective hood 11 is, for example, made in one piece and has different trimming areas depending on the customer's wishes. In the embodiment shown, a trimming area 13 is provided for the windshield, a trimming area 14 for the driver's door, a trimming area 16 for attaching vehicle documents or identification data for a vehicle, and a trimming area 17 for the radiator opening. Other areas can optionally be provided. For fastening the protective hood 11 in the sill area, for example, parts or tensioning belts are provided which engage with locking elements 18.

The protective cover 11 is preferably made of a plastic material that is impermeable to water, dirt and oil from the outside in and permeable to air, water vapor and light from the inside out. For example, the protective cover 11 is selected from a polypropylene fleece according to DIN 6001, called PP fleece for short, whose fleece construction according to DIN 61210 is characterized by a filament fleece and whose consolidation according to DIN 611210 is characterized by thermal bonding. The fleece material has, for example, a tear resistance in the longitudinal direction of at least 100 N/5cm and in the transverse direction > 25 N. The weight of the material in this case is 70 g/m ² +- 10 g/m ² . Of course, other materials can also be used and employed.

The protective cover 11 comprises a front and rear wheel arch cover 21, which is adapted to the shape of the fender and the course of the wheel arch 22. This allows the wheels to be freely accessible. However, it is necessary that the wheel arch cover 21 is fixed to the wheel arch 22 so that no disruptions occur during transport, especially when steering the front wheels. In addition, it is necessary that the wheel arch cover fits securely.

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cover 21 to the wheel arch 22 in order to avoid the disadvantages mentioned above.

For fastening the wheel arch cover 21 to the wheel arch 22, a holding element 24 is provided, which is shown in more detail in Figures 2 to 6, 9 and 10.

The holding element 24 is made of a flat strip-shaped material which has a curved shape. This curved shape or a sickle-like course of the holding element 24 can be seen, for example, in Figure 2. A flexible plastic material is preferably used. The wall thickness of the holding element 24 is, for example, 1 to 2 mm, whereas its width is, for example, 2 to 4 cm. The length of the holding element 24 is adapted to the respective wheel arch of the vehicle 12 to be protected. Composite materials made of two or more layers can be provided as additional materials for the holding element. Likewise, metallic and non-metallic materials as well as cardboard, paperboard or fiber-reinforced plastics or the like.

The holding element 24 is inserted into a pocket 26. This pocket 26 is preferably made of the same material as the other sections of the protective cover 11. The pocket 26 comprises a first layer 51 (Figure 8b) onto which the holding element 24 is placed. This is followed by a second layer 52 and the first and second layers 51, 52 are connected to one another with at least one seam 53 by sewing, welding or gluing. The holding element 24 is advantageously completely embedded in the pocket 26. Alternatively, it can be provided that the pocket 26 is only partially formed and partially surrounds the holding element 24. For example, the ends 27 and individual middle sections can be provided to form a pocket 26. After its production, the pocket 26 has, for example, the contour shown in Figure 2. An edge strip 28 is provided which is intended for connection to the wheel arch cover 21. Advantageously, it can be provided that pre-cut sections of the protective cover material are used to form the pocket 26 in order to form the pocket according to Figure 2.

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The pocket 26 produced according to Figure 2 is sewn onto the wheel arch cover 21. The radius of curvature 31 of the holding element 24 sewn into the pocket 26 in a rest position is adapted to the radius of curvature 32 of the wheel arch 22 and reduced. This results in an adjustment of the holding element 24, as shown for example in Figure 4.

As an alternative to the procedure for fastening the holding element 24 described in Figures 2 and 3, it can be provided that the holding element 24 is surrounded and directly fixed by a section arranged on the wheel arch cover 21. This makes it possible to achieve a one-piece design of the pocket 26 with the wheel arch cover 21.

Figure 4 shows a section along the line IV - IV according to Figure 1. After the protective cover 11 has been pulled onto the motor vehicle 12, the holding element 24 is arranged in the starting position shown in Figure 4. To fix the wheel arch cover 21 to the wheel arch 22, the holding element 24 is folded inwards according to arrow 36 so that the free end of the holding element 24 points towards the wheel housing or the middle of the vehicle. The holding element 24 rests under pre-tension with a holding force according to arrow 38 on the wheel arch 22 or an edge 35 of the wheel arch 22 and fixes the wheel arch cover 21 completely. Rubber elements or other tensioning elements can be provided in the transition to the sill area so that the protective cover 11 rests completely on the fender. Removing the protective cover 11 only requires folding the holding element 24 from its holding position 37 into the non-engagement position 34.

Due to the positioning of the holding element 24 with a smaller radius than its initial state, a folding effect is achieved, which in addition to fixing also enables centering and independent adjustment of the holder to the wheel arch 11. The design of the holding element 24 in a holding position 37 also has the advantage that a wind-repellent surface is created, so that additional inflation of the protective cover is prevented. By independently pulling it in, as can be seen from Figure 5, the

teren a protective cover 11 is created which fits tightly against the fender. The design of a wheel housing 39 can be connected to the wheel arch 22 in any manner and the holding function of the holding elements 24 is ensured.

In Figures 6 to 10, an alternative embodiment of the holding element 24 is also shown according to the invention and its manufacture is described in more detail. In Figure 6, a two-part holding element 24 is shown in a pocket 26, which comprises a first section 41 or a first half 41 and a further section 42 or a second half 42. The first half 41 and second half 42 are preferably identically designed and arranged symmetrically to the dividing line 43. The radius of curvature or the curved course of the first and second halves 41, 42 to form a holding element 24 is only an example. The same applies to the design of the ends 27, the contour of which can be adapted to different shapes or transition areas from the wheel arch 22 to the sill. The halves 41, 42 of the holding element 24 have holes 46, which are used for positioning and fixing to one another and to a lower layer 51 of a pocket 26 during automatic manufacture.

The dividing line 43 between the first and second halves 41, 42 is preferably provided at the apex. Alternatively, an asymmetrical arrangement can also be provided, so that half 41 is larger than half 42 or vice versa.

In the embodiment according to Figure 6, it is provided that a pocket 26 is formed which receives the holding element 24. In order to avoid mutual overlapping or displacement of the halves 41, 42, a plug connection (not shown in detail) is provided which positions the two halves 41, 42 relative to one another. In principle, any force-fit, form-fit and/or material-fit connections can be provided.

Figure 7 shows a plate 48 from which four halves 41, 42 are punched out. Depending on the plate dimensions as well as the size and shape of the halves 41, 42, a different number of halves 41, 42 can be punched out. Further

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Manufacturing forms are also conceivable. By dividing the holding element 24 into two parts, material-optimized manufacturing can be achieved. The gaps 49 between the individual halves 41, 42, which form waste, can thus be kept extremely small, since the shorter design of a section compared to the total length of the holding element 24 means that the individual sections can be arranged with a smaller gap 49 relative to one another.

In Figures 8 a and b, for example, an arrangement of a half 41 or 42 is shown in order to carry out a CNC-controlled production of the pockets 26. For example, three first layers 51 are applied to a processing table, which have a pre-cut contour. The half 41 or 42 is then placed on top. The second pre-cut layers 52 are placed on top of this in order to close the pocket. For this purpose, seams 53 are introduced by sewing, welding or gluing, as can be seen, for example, in Figure 8 b.

As an alternative to this procedure, a first layer 51 can also be formed by a continuous material web onto which the individual halves 41 or 42 are placed in order to be covered together by a second layer. Following the formation of the seams 53, the individual pockets 26 can be separated.

Figure 9 shows an alternative embodiment of the two-part arrangement of a holding element 24. In this embodiment, it is provided that the pockets 26 shown in Figure 8a are connected to a common pocket 26 by a connecting seam 56.

Alternatively, a first layer 51 can be provided to accommodate the halves 41 and 42 and a second layer can cover the halves 41 and 42 in order to subsequently introduce the seams 53 and 56. As a result, the halves 41, 42 are arranged separately from one another in a common pocket 26. The latter manufacturing method can also be integrated into an automatic process.

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Figure 10 shows a further alternative embodiment to Figures 6 to 9. The halves 41 and 42 are connected to one another by a seam 58. Reinforcing strips or support elements 59 can advantageously be provided on one or both sides so that the sections 41, 42 of the holding elements 24 are arranged in alignment with one another. These halves 41, 42, which are positioned relative to one another in a separate operation, are inserted into a pocket 26 and sewn in, as was described for example in Figures 2 and 3. This embodiment according to Figure 10 is also intended for process automation.

Figures 6 to 10 are described as examples of a two-part holding element 24, but are not limited to this. Multi-part holding elements can also be provided with sections 41, 42 arranged in one or more pockets 26. Likewise, the at least two-part design 24 of the holding element 24 allows the sections 41 and 42 to differ from one another and yet enables cost-effective production. The sections 41, 42 or further sections for forming a holding element 24 can differ from one another in terms of material, material thickness and curvature, as well as shape and design, and can be combined with one another as desired. If, for example, different attack forces or holding forces are to be provided for a curved body edge in order to fix a protective hood to this body edge, it is possible for different materials or material combinations to be used to form a holding element. For example, in the case of wheel arches, a stiffer material can be used in the transition area to the sill, while a flexible material is used at the apex of the wheel arch. This can be achieved by selecting different plastics, composite materials or even metallic materials in combination with plastics. The width of the retaining elements as well as their cross-section, shape and profile can also be adapted to the different applications.

The above statements apply analogously to at least one holding element 24, which engages under prestress in a holding position for fastening the protective hood 11 to an engine hood edge 25.

Claims (22)

1. Protective hood ( 11 ) for motor vehicles, motor vehicle parts, machines or the like, which is adapted to the overall external shape or the shape of individual parts of an object ( 12 ) to be protected, the edges of which are held on the object ( 12 ) to be protected, characterized in that along at least one edge of the protective hood ( 11 ), which is assigned to a body edge ( 22 , 25 ), a pocket ( 26 ) with at least one embedded, flat strip-shaped holding element ( 24 ) is provided, which in a holding position ( 37 ) engages the body edge ( 22 , 25 ) of the object ( 12 ) to be protected under prestress. 2. Protective hood according to claim 1, characterized in that the body edge ( 22 , 25 ) of the object to be protected ( 12 ) is designed as a wheel arch ( 22 ) and/or hood edge ( 25 ) near the windshield. 3. Protective hood according to claim 1 or 2, characterized in that the holding element ( 24 ) is provided with a width greater than a folded edge ( 35 ) of the body edge ( 22 , 25 ). 4. Protective hood according to one of the preceding claims, characterized in that the flat strip-shaped holding element ( 24 ) has a radius of curvature which is larger than the radius or curvature of a body edge ( 22 , 25 ). 5. Protective hood according to one of the preceding claims, characterized in that in order to increase the holding force of the holding element ( 24 ) on the body edge ( 22 , 25 ), the difference between the radius of curvature of the holding element ( 24 ) and that of the curvature of the body edge ( 22 , 25 ) is increased. 6. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) is a part produced by punching, milling, injection molding, deep drawing, extrusion or calendering. 7. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) is made of plastic, sheet metal, cardboard, a composite material of the aforementioned materials with and without fibers, fabric inserts or fabric reinforcements. 8. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) is formed from a flat rectangular cross-section. 9. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) has flexurally elastic properties. 10. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) in a rest position is at least partially, preferably completely inserted into a pocket ( 26 ) which is made of a material for the protective hood ( 11 ). 11. Protective hood according to one of the preceding claims, characterized in that the pocket ( 26 ) is formed from one or two layers ( 51 , 52 ) and the layer or layers ( 51 , 52 ) can be connected by sewing, welding or gluing after the holding element ( 24 ) has been inserted. 12. Protective hood according to one of the preceding claims, characterized in that a free interior of the pocket ( 26 ) is slightly larger than the cross section of the flat strip-shaped holding element ( 24 ). 13. Protective hood according to one of the preceding claims, characterized in that the holding element ( 24 ) is formed in two parts or several parts. 14. Protective hood according to claim 13, characterized in that in a holding element ( 24 ) consisting of several sections ( 41 , 42 ), dividing lines ( 43 ) formed between the holding elements ( 24 ) are provided at regular intervals. 15. Protective hood according to claim 13, characterized in that a dividing line ( 43 ) is provided in the apex of the body edge ( 22 , 25 ) in a holding element ( 24 ) consisting of a first and a further section ( 41 , 42 ). 16. Protective hood according to claim 13 to 15, characterized in that each section ( 41 , 42 ) is inserted into a separate pocket ( 26 ) to form a holding element ( 24 ). 17. Protective hood according to claim 13 to 16, characterized in that each section ( 41 , 42 ) of the holding element ( 24 ) is inserted into a common pocket ( 26 ) and in the region of the dividing line ( 43 ) a seam ( 56 ) is provided by sewing, gluing or welding for the separate arrangement of the sections ( 41 , 42 ) in the pocket ( 26 ). 18. Protective hood according to claim 13 to 16, characterized in that before inserting the at least two-part holding element ( 24 ) into a common pocket ( 26 ), the sections ( 41 , 42 ) of the holding element ( 24 ) are arranged to one another by a positive, non-positive and/or material connection. 19. Protective hood according to claim 13 to 18, characterized in that the sections ( 41 , 42 ) can be connected to one another by sewing, welding or gluing. 20. Protective hood according to claim 13 to 19, characterized in that the sections ( 41 , 42 ) of the holding element ( 24 ) can be connected to one another by a plug connection. 21. Protective hood according to claims 13 to 20, characterized in that a reinforcing strip ( 46 ), preferably made of fabric, fiber material or the like, is applied to one or both sides of the holding element ( 24 ) over each dividing line ( 43 ) of the sections ( 41 , 42 ). 22. Protective hood according to one of the preceding claims, characterized in that the pockets ( 26 ) with inserted holding element ( 24 ) or holding elements ( 24 ) can be arranged on the wheel arch covers ( 21 ) adjacent to the body edge ( 22 , 25 ) by sewing, welding or gluing.