Abstract:
A fastening device has a supporting part ( 9 ), adhesive fastening elements ( 25 ) attached to the supporting part and protruding from the supporting part ( 9 ), a shaft part ( 27 ) protruding beyond the supporting part ( 9 ), and at least one elastically resilient hooking part ( 19 ). Each hooking part ( 19 ) extends outward away from the shaft part ( 27 ) or a holding part ( 29 ) for the hooking part ( 19 ) in an initial position, forming an intermediate space ( 30 ), which is reduced as soon as the hooking part ( 19 ) is moved toward the shaft part ( 27 ) or the holding part ( 29 ) under the influence of an external application of force.

Description:
FIELD OF THE INVENTION 
       [0001]    The invention relates to a fastening device comprising a support part and adhesive fastening elements attached to and protruding from the support part. A shaft part protrudes beyond the support part and is connected to at least one elastically resilient hooking part. 
       BACKGROUND OF THE INVENTION 
       [0002]    Fastening devices, which fix objects or components to third components by forming adhesive connections, are prior art in a wide variety of arrangements. The documents DE 10 2008 007 913 A1 or DE 10 2010 027 394 A1, for example, disclose fastening devices, which may be used to fix third components at predefinable points on components, whether they are parts of motor vehicles, trains, ships or of aircraft. In the case of motor vehicles, such third components may be, for example, covers on body parts, panels or other flat coverings. In the case of buildings, such fastening devices may also serve to fix flat coverings, such as panels or textile sheets at predefinable points, for example, to conceal unsightly locations or to also form a thermal insulation and/or sound insulation. 
         [0003]    Because the connection between the relevant component and the third component to be fixed thereto is achieved not by screw fastening, riveting or nailing, but by way of an adhesive connection by adhesively engaging adhesive fastening elements that are connected to a component to corresponding adhesive fastening elements on the respective third component, the result is, for one, a substantial reduction of the assembly effort and, for another, the particular advantage that position tolerances between the component and the third component may be compensated for during manufacture of the adhesive connection. To enable a simple and economical assembly when using such fastening devices, the support part provided with adhesive fastening elements in a fastening device of the aforementioned kind disclosed in DE 10 2010 010 893 A1 is provided with a protruding shaft part, which includes elastically resilient hooking parts with which the support part may be clipped into a fastening hole on the associated component. 
       SUMMARY OF THE INVENTION 
       [0004]    An object of the invention is to provide an improved fastening device of this type, which is distinguished, in particular, by universal applications. 
         [0005]    According to the invention, this object is basically achieved by a fastening device including respective hooking parts in an initial position that extend outwardly away from the shaft part and/or from a holding part for the respective hooking part while forming an intermediate space. The intermediate space is reduced as soon as the respective hooking part moves toward the shaft part and/or holding part under the influence of an external application of force. Because the hook elements, in contrast to the cited known solution, are thus formed not as nubs with no intermediate space deflecting into the shaft, but rather as a type of wings, which extend outwardly from the shaft or holding part in the unloaded initial position while forming an intermediate space, the attachment to the assigned component is not limited to the presence of a correspondingly positioned matching fastening hole. Instead, it opens the possibility of designing hook positions more freely in terms of dimensioning as well as shape, so that the hooks may be engaged not only point by point, but also in positions variable in the desired direction. The hooks may be engaged, for example, by inserting them in the opening of a profile engageable from behind extending in one direction, so that the invention offers particularly universal applications. 
         [0006]    The arrangement may be such that at least one part of the hooking parts extends away on the outer circumferential side starting directly from the shaft part. Alternatively, the holding part situated on the shaft part can support at least one hooking part. 
         [0007]    In exemplary embodiments, in which a holding part for respective hooking parts is situated on the shaft part, preferably on the free end thereof, the holding part may have a block-shaped or rectangular-shaped design and may extend with its longitudinal axis or transverse axis perpendicular to the longitudinal axis of the shaft part. The vertical axis of the holding part preferably coincides with the longitudinal axis of the shaft part. 
         [0008]    The holding part may particularly advantageously include two opposing hooking parts, as viewed diametrically to the longitudinal axis of the shaft part. The hooking parts situated opposite one another on both front sides of the holding part preferably face in opposite directions. 
         [0009]    In particularly advantageous exemplary embodiments having hooking parts situated on the front sides of the holding part, the hooking parts are advantageously situated such that the respective intermediate space, which is bound by at least one front side of the holding part as well as by the hooking part assigned to this front side, tapers in the direction of a connection point between the holding part and the hooking part. 
         [0010]    To maintain the elastically resilient property of every hooking part, the connection point with the holding part extends preferably across the entire front side of the block-shaped or rectangular-shaped holding part. The connection point has a wall thickness, which preferably corresponds to one to three times the thickness of the hooking part. 
         [0011]    In this case, the arrangement may be advantageously such that the respective wing-like hooking part lies within the imaginary continuous side surfaces of the block-shaped or rectangular-shaped holding part, fitting flush with these imaginary side surfaces in each case. Thus, in the case of a connection point located in a corner area of the assigned front side of the holding part, the length of the wing formed by the hooking part corresponds to the width of the front side. 
         [0012]    The preferably cylindrical shaft part, the preferably plate-shaped support part and the block-shaped or rectangular-shaped holding part with its wing-like hooking part may be advantageously formed as one piece, preferably from plastic material. The adhesive fastening elements are adhesively connected or melted to the support part. 
         [0013]    The subject matter of the invention is also a fastening system, which includes at least one of fastening device according to the invention. 
         [0014]    Other objects, advantages and salient features of the present invention will become apparent from the following detailed description, which, taken in conjunction with the drawings, discloses preferred embodiments of the present invention. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0015]    Referring to the drawings that form a part of this disclosure: 
           [0016]      FIG. 1  is a partial perspective view of a fastening system according to an exemplary embodiment of the invention in the manner of a schematically simplified functional sketch; 
           [0017]      FIG. 2  is an exploded side view drawn in approximately double the size of a practical embodiment, of the support part provided as the fastening device for the fastening system of  FIG. 1 , including adhesive fastening elements to be attached thereto, the adhesive elements of which are likewise depicted schematically simplified as mushroom heads; 
           [0018]      FIG. 3  is a perspective angular view of the separately depicted adhesive fastening elements of  FIG. 2 ; 
           [0019]      FIG. 4  is a bottom view of the support part of  FIG. 2 ; 
           [0020]      FIGS. 5 and 6  are views of the two opposing front sides of the support part of  FIG. 4 ; 
           [0021]      FIGS. 7 and 8  are views of the opposing longitudinal sides of the support part of  FIG. 4 ; 
           [0022]      FIGS. 9 and 10  are perspective views, as seen on the bottom side and upper side of the support part, respectively; 
           [0023]      FIG. 11  shows a partial front view of the panel shown in  FIG. 1  to be attached by the fastening device, including a support part located in the mounting position or initial position with highly schematized adhesive elements indicated as hooks; 
           [0024]      FIG. 12  is a partial front view of the panel shown in  FIG. 1  with the support part rotated into the functional position; and 
           [0025]      FIG. 13  is a partial perspective angular view of a modified embodiment of the fastening system according to the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0026]      FIG. 1  illustrates an exemplary embodiment, in which the fastening system according to the invention is used for the purpose of attaching a flat panel  1  to the ceiling  3  in a room  5  of a building, not depicted. The fastening device according to the invention forms adhesive connections. For this purpose, two adhesive fastening elements  7  are attached to the ceiling  3  to form connection areas. Fastening element  7  adhesively engage with support parts  9  of the fastening device according to the invention, when the panel  1  with its straight upper edge  11  is applied to the ceiling  3  in the direction of a movement arrow  12 . In the example shown, only two adhesive fastening elements  7  with assigned support parts  9  for forming the connection areas are shown in the simplified depiction of  FIG. 1 . A larger number of connection points having a corresponding plurality of support parts  9  and assigned adhesive fastening elements  7  may be provided. An elongated adhesive fastening element  7  may likewise be provided as indicated in  FIG. 1  and extends essentially over the entire length of a component to be attached, such as a panel  1 , to adhesively engage with a corresponding number of support parts  9 . The details of the design of the support parts  9  may be seen in  FIGS. 2 through 10 . The manner of attachment of the support parts  9  to the panel  1  is apparent from  FIGS. 11 and 12 . 
         [0027]    As the last-mentioned figures and  FIG. 1  show, a profile channel  13  forms inner contact surfaces  15  and  17 , as is most readily apparent from  FIGS. 11 and 12 . The respective support part  9  with hooking parts  19  of the respective support part  9  may be anchored to the contact surfaces  15 ,  17 , and is provided for anchoring the support parts  9  along the upper edge  11  of the relevant component, in this case the panel  1 . The design of the support parts  9  with the hooking parts  19  may be seen in the  FIGS. 2 through 10 . As is most clearly shown by the  FIGS. 2, 4  as well as  9  and  10 , the support parts  9  include a rectangular-shaped flat support plate or member  21 . On the upper side of support plate  21  a slightly protruding circumferential edge  23  is located. This edge forms a surround for an adhesive fastening element  25  corresponding to the aforementioned prior art, attached by adhesive or thermal bonding. Fastening element  25  is depicted in  FIG. 2  before the attachment of the support plate  21  and is depicted separately in  FIG. 3 . In these figures, the associated adhesive elements are indicated schematically as mushroom heads. In this case, mushroom heads form a hermaphroditic adhesive attachment and may likewise be provided on the assigned adhesive fastening elements  7  of the relevant third component. Other types of adhesive elements may be provided, for example, hooks on the support part  9 , as schematically indicated in the  FIGS. 11 and 12 , which may interact with a fleece material on the adhesive fastening elements  7 , or loops on the support parts  9  for interacting with hook elements on the adhesive attachment elements  7  or in reverse arrangement. 
         [0028]    The support parts  9  in the present example, formed from transparent plastic material, include a round cylindrical shaft part  27  in the center of the support plate  21  and protruding from the support plate at a right angle to the plate plane. The shaft part  27  forms the support for the hooking parts  19 . The shaft part  27  is designed as a tube-shaped hollow body, as shown in  FIGS. 4, 9 and 10 . In the example shown, the hooking parts  19  are not situated directly at the free end of the shaft part  27 . Rather, the hooking parts  19  are on a holding part  29  shaped as a block in the form of a rectangular cuboid. The holding part extends at the free end of the shaft part  27 , with its longitudinal axis and transverse axis perpendicular to the longitudinal axis of the shaft part  27 . As may most clearly be seen from the  FIGS. 4 through 10 , the hooking parts  19  are molded onto the holding part  29  at connection points  31 , which are situated diametrically opposite one another on the holding part  29 . The hooking parts  19  in this case are designed as wings of equal shape and size, which wings, as is most readily apparent from  FIG. 4  as well as  9  and  10 , protrude flexibly outward in the unloaded state away from the connection points  31  serving as bending points, while forming an intermediate space  30  between the wings and the front side  33  of the holding part  29 . The wings have rectangular shapes corresponding to the shape of the holding part  29 , extend accordingly over the entire area of the front sides  33  of the holding part  29  and have approximately the same wing length as the facing front side  33 . 
         [0029]      FIGS. 11 and 12  illustrate the mounting process or anchoring process in the profile channel  13  of the relevant third component, such as the panel  1 .  FIG. 11  shows the support part  9  in an initial position with a rotational position in which the support plate  21  extends projecting laterally beyond the upper edge  11 . In this rotational position, the wing-like hooking parts  19  are splayed in the longitudinal direction of the profile channel  13 , so that they may be inserted together with the shaft part  27  through the profile opening  35  of the profile channel  13 , see  FIG. 11 . The hooking parts  19 , when twisted by  90 ° about the longitudinal axis  38 , as indicated by the rotating arrow  36  in  FIG. 11 , come into resilient contact with the side walls  37 . Side walls  37  are located in the area of the groove-shaped expansion of the profile channel  13 . In the rotational position shown in 
         [0030]      FIG. 12 , not only is the support part  19  with its support plate  21  flush with the outer sides of the panel  1 , but the upper side  28  of the block-like holding part  29  on the shaft part  27  is also in bottom engagement with the contact surfaces  15  and  17  in the expansion of the profile channel  13 . The support part  9  is then form-lockingly secured from lifting out of the profile channel  13 . In this functional position, the respective support part  9  is friction-lockingly secured against displacement along the profile channel  13  by the hooking parts  19 , which resiliently abut the side walls  37 . For attaching to the ceiling  3 , the support parts  9  can be set in the assigned positions on the third component flush or aligned with the adhesive fastening elements  7 , but are secured by the friction lock against undesirable sliding movements during the mounting process. The component, in this case, panel  1 , can then be reliably and effortlessly adhesively engaged with the adhesive fastening elements  7  on the third component. 
         [0031]      FIG. 13  illustrates an embodiment of the fastening system, in which a component in the form of a wall covering  41  is to be attached by an adhesive connection and is provided to form the relevant space  5  as an anechoic chamber. This flat component has a pattern of projecting bodies known for this purpose, indicated only partially on the visible side in  FIG. 13 . To attach the wall covering  41  on a side wall  45  of the room, hooking elements  7  are provided on the side walls  45  for the adhesive engagement with the hooking parts  9 , which are located on the rear side of the wall covering  41 . The profile channel  13 , provided for anchoring the hooking parts  9 , extends spaced apart from the upper edge  11  in the horizontal direction at the level of the adhesive fastening parts  7  located on the side wall  45  for forming the adhesive connection when applying the wall covering  41  in the direction of the movement arrow  12 . A larger number of adhesive fastening elements  7  or assigned adhesive fastening elements  9 , which may be distributed over arbitrary surface areas of the wall covering  41 , may be provided on the side wall  45  and/or on the rear side of the wall covering  41 . 
         [0032]    While the hooking parts  19  above are formed as identically shaped wings, which are splayed outwardly in the initial position starting from both front sides  33  of the block-shaped holding part  29 , that another number or differently shaped hooking parts could alternatively be provided. 
         [0033]    While various embodiments have been chosen to illustrate the invention, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined in the claims.