Abstract:
The present invention relates to a joining arrangement for joining joining partners of a vehicle, including a first joining partner and at least one second joining partner wherein a holding device is provided that serves for connecting the joining partners in order to form the joining arrangement, where the holding device has a receiving structure at which at least one adhesive element is arranged that can be brought into at least two states, where in a first state the adhesive element allows for adjusting the second joining partner to the first joining partner and where a transition from the first state to a second state can be effected by a transformation means, where in the second state the adhesive element is cured, whereby the joining partners can be fixed to each other.

Description:
TECHNICAL FIELD 
       [0001]    The present invention involves a joining arrangement for joining joining partners of a vehicle comprising a first joining partner and at least one second joining partner, wherein a holding device is provided that serves for connecting the joining partners in order to form a joining arrangement. 
       BACKGROUND 
       [0002]    A front module of vehicles bearing an assembly carrier being mounted to the carriage of the vehicle is know from DE 10 2007 016 925 A1. Further an illumination device is arranged at an assembly carrier, whereas the mounting of the illumination device occurs via a holding device, in particular via a holding base. Therewith the assembly carrier is providing the first joining partner and the illumination device is providing the second joining partner. The holding base, forming the holding device, can be placed between a preliminary assembly position and a final assembly position. In order to adjusting existing tolerances during the assembly of the assembly carrier at the vehicle, an according adjustment of the illumination device at the assembly carrier is required. After the illumination device of the vehicle has been adjusted for the given contouring to the neighboring carriage, a final fixation of the illumination device occurs using fixing means, in particular a bolted assembly, whereby a substantial complexity of assembling, in particular a significant complexity of adjustment, arises. 
       BRIEF SUMMARY 
       [0003]    The invention provides a joining arrangement to join joining partners of a vehicle, with a reduced complexity of assembling, in particular a reduced complexity of adjusting two joining partners of a vehicle to one another. 
         [0004]    According to the invention it is intended that the holding device bears a receiving composition comprising at least one adhesive element which is at least convertible into two different states. In the first state the adhesive element enables an adjustment of the second joining partner to the first joining partner, whereby an exchange from the first to the second state can be activated by a means. In the second state however the adhesive element is cured whereby a fixation of the joining partners to one another can be achieved. 
         [0005]    The basic of the invention comprises the joining partners which are attached to one another or attached to the vehicle respectively, whereas simultaneously it is ensured that the joining partners exhibit a specified contouring relative to one another or relative to a neighboring carriage of the vehicle. Due to the adhesive element being arranged at the receiving composition and allowing an adjustment of at least one joining partner in its first state a reliable and safe positioning of the joining partner at the vehicle or the joining partners among one another is ensured. In the first state of the adhesive element the receiving composition is in its preliminary assembly position in which the joining partner can be aligned according to the neighboring carriage of the vehicle, for example the car wing or the bonnet, etc. 
         [0006]    Has an appropriate adjustment of the illumination device been carried out by a workman, a modification from the first to the second state is activated via means. By this change of conditions the adhesive element cures. At this the receiving composition is already in its final assembly position. The joining partner at the vehicle or the joining partners among themselves has reached a or rather its final position, which matches the reference position, if the adhesive element has reached its cured state, meaning if the adhesive element has reached its second condition. Hence, a final fixation of the joining partners is achieved in a simple way. 
         [0007]    It may be useful if the means are accomplished as external means. The external means can be carried out as energy, which activates the modification from the first to the second state based on a variation of the environmental condition. This may occur e.g. through access of light, sound, humidity or exclusion from atmospheric oxygen. The external means may be composed of chemical means, in particular fluids, and/or electrical means and/or mechanical means and/or airborne contact and/or means in terms of energy supply, in particular thermal energy to raise the temperature of the adhesive element, brought in preferably from external heat transmission and/or from electromagnetic radiation, especially energy from light, and/or from sound energy, especially from ultrasonic sound, and/or from microwaves and/or from induction. Adhesives being transferred from a first to a second state through the insertion of energy are basically known. If energy is inserted into the mass of adhesive a curing of the adhesive may occur and both joining partners are fixed to one another. 
         [0008]    A possible transformation of an adhesive from its second back to its first state using the same or different means, in particular external means, is particularly known and can be used advantageously. It is e.g. possible that after a fixation of the joining partners to one another a state of the adhesive can be achieved in which both joining partners can be readjusted. 
         [0009]    It is in particular advantageously that the modification from the first to the second state occurs with a minimal effort. Is the first joining partner already in its desired adjusting position, there is no further need for a workman to fix the first joining partner to the second joining partner via e.g. mechanical fixing means, like bolts etc. The adhesive element solely needs to achieve its second state, whereas the adhesive element is nearly cured in the second state and therefore the final fixation of the illumination device at the assembly carrier is assured. 
         [0010]    In an advantageous further embodiment of the invention the means can involve an induction coil unit which enables a thermal insertion in the adhesive element and which is designed to an extend that it forms an operative connection with the holding device. The induction coil unit can preferably be designed in a circular, bracket- or U-shaped way and can manually or automatically be placed in a position in which the induction coil unit is at least partially enclosing the holding device. To match the circular, bracket- or U-shaped induction coil unit the holding device may be formed in a cylindrical way. If the induction coil unit is surrounding the holding device, an adequate supply of current to the induction coil unit can generate an electrical current flow in an electrically conducting component of the receiving composition. Using this electrical current flow a heat development can be achieved transforming the adhesive element from its first to its second state. The induction coil unit is brought into contact with the receiving composition and is not activated until the joining partners are adjusted to one another. Following the transformation of the state, the adhesive element is cured and the assembly of the joining partners to one another is fixed. The induction coil unit can either manually be brought in an operative connection with the holding device although the holding device can exhibit a manually not accessible position, e.g. between a front end module and the frame of the vehicle or between an illumination device and an assembly carrier, so that a device may serve to bring the induction coil unit into an operative connection with the holding device. The induction coil unit can alternatively be permanently connected with the holding device. It is appreciated that the induction coil unit is singularly injected with a current to achieve the modification of states of the adhesive element. For the following durable application of the holding device, positioned between the joining partners, the induction coil unit remains at the holding device, whereby the induction coil unit is continuatively a construction part of the holding device. 
         [0011]    Advantageously the geometry of the adhesive element can be adapted to the receiving composition in particular building a cavity in which the cavity-adapted adhesive element is incorporated whereas the adhesive element is viscous in its first state. During the adjustment of the two joining partners to one another in the first state of the adhesive element it is malleably deformable. Is the desired final assembly position reached after adjusting the joining members to one another the subsequent activation of the modification of states of the adhesive element takes place. The adhesive element is not necessarily inherently stable but can be of a gel- or a jelly-like consistency. The cavity in the receiving composition is incorporating the adhesive element which advantageously is filling-out the cavity. 
         [0012]    The adhesive element can be composed of Hotmelt, in particular a reactive Hotmelt, and/or of encapsulated polyurethan and/or of epoxide adhesive and/or of acrylate adhesive. In particular the receiving composition may be of multi parts, whereas at least a first part of the receiving composition is arranged at the first joining partner and a second part of the receiving composition is arranged at the second joining partner and/or is integrally formed and/or is composed of itself, respectively. The cavity of the adhesive element is sectionally narrowed through the first part and the second part of the receiving composition. As long as the adhesive element is in its first, viscous state both parts of the receiving composition may be shifted against one another. Is the adhesive element and a modification into the cured state activated, both parts of the receiving composition are fixed to one another. 
         [0013]    Continuatively it is conceivable to trigger a modification of the adhesive element into the second state via internal means. At this the adhesive element can possess at least two chambers or both chambers build one cavity, whereas in the first chamber a first component and in the second chamber a second component of the adhesive resides. Advantageously a barrier all element is intended which separates the chambers in the inactivated state of the adhesive element and upon activation the barrier element is movable enabling the mixing of the first and the second component of the adhesive, whereas the barrier element is movably mounted in particular to the adhesive element and can be activated using a defined external area. The barrier element may e.g. be movably mounted to the adhesive element and may be turned into its operative position using a defined external area. Advantageously both components comprise monomers defining the basic molecules of the polymer developing during the mixture. One of both components can e.g. comprise resin monomers or binding agents, while the other component comprises a curing agent. Further ingredients of the components may be stabilizers, thixotropic agents, mediators, further additives, and/or dyes or filler media. The barrier element may be a membrane, which admits a mixture of both components after the final assembly. 
         [0014]    With a notable advantage the joining arrangement is formed for joining preventilated assembly groups of a vehicle, in particular of a front module, of a rear end module, of a hatch door, of a door module and/or of a bumper, in particular a cover of a bumper at a carriage of a vehicle, an illumination device with or at an assembly carrier and/or a cockpit device of a vehicle. According to the present invention, the joining arrangement for joining preventilated assembly groups of a vehicle is basically advantageously applicable if the assembly group comprises components which need an exact arrangement to one another or the assembly group needs an exact arrangement towards the carriage structure of the vehicle to e.g. maintain clearances. If an illumination device in a front module, in particular a headlight, and is the front module via the assembly carrier fixed to the carriage, the headlight maintains clearances with the carriage or other interfaces, which need to be kept exactly. A summation of dimensional tolerances develops from multiple sequent components mounted to one another, leading to the advantage of a possible adjustment of assembly groups using the holding device according to the present invention and the therein affiliated adhesive element without the necessity to manually reach the holding device and the adhesive element. A single adjustment position of the assembly groups may be “frozen up” if, according to the present invention, external means, e.g. induction coil units, are used to transform the adhesive element from its first to its second state. The external means activating the transformation of states of the adhesive element may be accomplished in a way that a workman does not need to arrange an adjustment position simultaneously to activate the transformation of states of the adhesive element at a time. The external means may cover e.g. a time-dependent activation of an activation due to mechanic influence or the insertion of energy, whose activation may be regulated via a easy-to-operate control element, e.g. a foot-switch. 
         [0015]    According to an advantageous embodiment the first part of the receiving composition may be a casing and/or the second part of the receiving composition may be formed as a rod-shaped element, whereas the rod-shaped element extends its head piece into the casing so that the cavity extends to the acceptance of the adhesive element, in particular as a circular structure between the head piece and the casing. The rod-shaped element comprises preferably an elongated extension correlating approximately to the line of symmetry of the cylindrical holding device. The head piece may be formed as a spherical segment and/or as a disc-like section and/or as a cuboid segment and/or as a mushroom-shaped segment and possesses at least one rear intersection area to in particular enlarge the adhesive contact area between the adhesive element and the rod-shaped element. Additionally a form-closed contact between the cured adhesive element and the head piece is build. The rod-shaped element extends itself partially into the casing if the rod-shaped element is inserted into the casing, particularly surrounding the head piece inside the casing. Thereby a radial space is intended between the rod-shaped element and the inside of the casing, which is providing the space for the way of adjusting if the first joining partner, at which the rod-shaped element is arranged, is located at the opposite of the second joining partner, at which the casing is arranged, in any axis in the range of six variances. Thereby the location of the rod-shaped element in the casing can be varied, whereby the location of the rod-shaped element is fixed behind the adjustment in the casing due to a transformation of states of the adhesive element to its cured state. The head piece may adopt any geometry to form an as large as possible contact area with the adhesive element. Further a rear intersection area is generated to enlarge the maximal holding force between the rod-shaped element and the casing. Continuatively the head piece may possess ribs, recesses, pits or elevated areas to enlarge the contact area and build a rear intersection area. 
         [0016]    The casing may in an advantageous embodiment be formed as a clips-casing, whereby a casing element is intended, designed as a clips-casing. The clips-element is mounted to the clips-casing using a clips-assembly to preassemble the rod-shaped element in the casing. Using a preassembly the adhesive element simultaneously inserts between the rod-shapes element and the casing and preassembles both parts. A sealing element is intended particularly building a cavity for accepting the elastic part of the adhesive element, whereas the sealing element is assembled at the casing element and/or at the rod-shaped element. After preassembling the holding device the adhesive element is in its first state being basically enclosed. The sealing element may be of a collar-like form being elastic and allowing a displacement of the rod-shaped element in the casing if the adjustment has occurred. Due to the clips-assembly of the casing element the rod-shaped element may be attached to the casing leading to a retaining of the first joining partner to the second joining partner by accepting at least the self-weight of one of the joining partners to the holding device, which may exist several times between the joining partners, in particular three times. 
         [0017]    The casing element may comprise an assembling help, particularly shaped as a geometric recess which at least interferes with one present mounted molding recess if the casing element is arranged at the casing. Therefore the casing element can only be mounted in one exact position above the casing in which the clips-assembly is possible, leading to an advantage if the holding device needs to be mounted at a position out of sight of the workman or at the vehicle. By way of example the assembly of the second joining partner at the first joining partner only occurs if at the same time the parts of the receiving composition are joint against one another. The first part of the receiving composition can be preassembled at the first joining partner whereby the second part of the receiving composition is already present. The parts of the receiving composition are assembled if the joining partners are arranged to one another, meaning the rod-shaped element in the casing. The assembling aid offers an ease if the assembly takes place in a for a workman non-visible area whereby the workman afterwards needs to place the casing element above the casing. The assembly aid may have the shape of notches in the casing element, whereby the casing presents provisions with which the notches interfere. The clips-assembly takes places as soon as the casing element is in the correct pivot position above the casing. 
         [0018]    According to another advantageous embodiment the casing may be formed as a bayonet-casing and the casing element as a bayonet-element, whereby the bayonet-element is assembled at the bayonet-casing using a bayonet-conjunction, to such an extent that the preassembly of the rod-shaped element takes place in or at the casing. The bayonet-conjunction initially demands an axial joining of the casing element to the casing whereby an adjacent rotation occurs in a certain angle. 
         [0019]    Following another advantageous embodiment the casing may be a screw-socket and the casing element may be a screw-element whereby the screw-element can be assembled at the screw-socket using a screwing in a way that the preassembly of the rod-element occurs in the casing. 
         [0020]    The rod-shaped element may comprise an assembly part, which is preferably designed as a press-collar to press the rod-shaped element against a recessed area of the second joining partner to build a form-closed interaction whereby a screw-element is intended which is screwed at or in the rod-shaped element. The press-collar may build a saucer-shaped provision at the rod-shaped element whereby at least the outer perimeter comprises a structure, e.g. an axial knurl. If the saucer-shaped provision is pushed into a recessed area at the second joining partner the screw-element may be used as a casing to press the press-collar into the recess at the second joining partner and keep it in the recess. The structure at the outer perimeter of the press-collar causes a simultaneous rotation of the rod-shaped element to screw the screw-element advantageously onto the thread section of the rod-shaped at a for the workman accessible position, to connect the rod-shaped element with the second joining partner. 
         [0021]    According to another advantageous embodiment of the invention, the holding device may provide a heating-element to build a means for changing the states of the adhesive element, which particularly may be arranged in the casing and/or in the rod-shaped element and which is accomplished to heat the adhesive element in a way that the heating-element is providing a or the means to activate the transformation from the first to the second state of the adhesive element. The heating-element may be shaped as a heated filament and may comprise coil-like twists, which extend in the casing or in the rod-shaped element around the axis of symmetry. To electrically connect the heating-element connecting cables may conduct out of the heating-element. 
         [0022]    According to another embodiment the heating-element which is arranged at and/or in the adhesive element itself or at least at the cavity and which is accomplished to heat the adhesive element in a way that the heating-element builds a or the means to activate the transformation from the first to the second state of the adhesive element. A heating-element may further be intended in the adhesive element itself or in the casing and/or in the rod-shaped element. 
         [0023]    According to another possible embodiment the adhesive element may be build from an electrical conducting material. This electric conducting material may comprise a specific resistance offering a magnitude which is determined in a way that by establishing a voltage between the electrical conducting casing and the electrical conducting rod-shaped element an according decay of voltage in the adhesive element occurs. In this way a heat development is caused in the adhesive element leading to a transformation of states of the adhesive element from viscous to cure. Advantageously an electrical adaptor between the casing and the rod-shaped element is arranged without the necessity of a heating-element in the holding device or in the adhesive element. Moreover a heat development can be generated by using the induction coil unit which induces eddy currents in the induction coil unit in the adhesive element. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]    Further embodiment-improving provisions are given below in conjunction with preferred embodiments of the invention. It is shown in a schematic representation: 
           [0025]      FIG. 1  an assembly carrier to build a first joining partner with connecting links which is attached to the illumination device and a second joining partner, whose illumination device is not shown, 
           [0026]      FIG. 2  a detail view of the assembly of the second joining partner at the first joining partner and of a holding device between the joining partners, 
           [0027]      FIG. 3  a first embodiment of a holding device according to the present invention in an disassembled state, 
           [0028]      FIG. 4  the embodiment according to  FIG. 3  in an assembled state, 
           [0029]      FIG. 5  the assembly of an induction coil unit at the holding device according to the embodiment in  FIG. 3  and  FIG. 4 , 
           [0030]      FIG. 6   a  the assembly of an induction coil unit at the holding device in a cross section view, 
           [0031]      FIG. 6   b  the assembly of the heating element in the casing of the holding device, 
           [0032]      FIG. 6   c  the assembly of the heating-element in the adhesive element between the casing and the rod-shaped element, 
           [0033]      FIG. 7  a second embodiment of a holding device in a disassembled state, 
           [0034]      FIG. 8  the embodiment of the holding device according to  FIG. 7  in an assembled state, 
           [0035]      FIG. 9  the embodiment of the holding device according to  FIG. 7 , whereby the rod-shaped element shows another embodiment, 
           [0036]      FIG. 10  another embodiment of the holding device in a disassembled state and 
           [0037]      FIG. 11  the embodiment of the holding device according to  FIG. 10  in an assembled state. 
       
    
    
     DETAILED DESCRIPTION 
       [0038]      FIG. 1  illustrates an assembly carrier  10  representing a first joining partner  10  in a perspective view. The assembly carrier  10  generates the framework of a front module of a vehicle, at which e.g. an illumination device, not shown in the view, is arranged. The illumination device exhibits multiple connecting links, building the second joining partner  20  in this exemplary embodiment. In order to arrange the second joining partner  20  at the assembly carrier  10 , three holding devices  30  serve as an exemplary joining arrangement. Two joining links for building the second joining partner  20  are shown at the rear side of the assembly carrier  10 , whereas the subsequent  FIG. 2  is illustrating one of the joining arrangements. 
         [0039]    In  FIG. 2  a part of the assembly carrier  10  is shown in detail, at which a second joining partner  20  is assembled, e.g. as a connecting link of an illumination device  20 . A holding device  30  according to the invention serves as a configuration between the first joining partner  10  and the second joining partner  20 . The holding device  30  in achieved in a cylindrical way and comprises an adhesive element in a not precisely defined way. This adhesive element is at least transformable into two states, whereby in a first state the adhesive element enables an adjustment of the second joining partner  20  at the first joining partner  10 , and by using means the transformation from the first to the second state can be activated, whereby the adhesive element is cured in its second state, achieving a fixation of the joining partners  10  and  20  to one another. 
         [0040]    An induction coil unit  50  is illustrated as an exemplary means to transform the state of the adhesive element. The induction coil unit  50  is encapsulating the holding device  30  in a U-shaped way, and a heat development within the holding device  30  occurs upon electromagnetic coupling with another induction element by applying an induced voltage in the induction coil  50 , whereby the heat development acts on the adhesive element or it occurs in the adhesive element itself. Due to the heat development the adhesive element is transformed from the viscous to the cured state, and the second joining partner  20  is fixed to the first joining partner  10  in stationary and in a stable position using an according adjustment. 
         [0041]      FIGS. 3 and 4  present a first embodiment of the holding device  30 , in a dismantled, flying view in  FIG. 3  and in a mounted state in  FIG. 4 . The holding device  30  comprises a first part of the receiving composition  31 , which is formed as a casing  31 , and a second part of the receiving composition  32 , which is exhibited as a rod-shaped element  32 . The casing  31  is formed as a clips-casing  31   a  and possesses snap-fits  36 , which snap in place into snap-openings  37 , inserted in a casing element  33 , whereby the casing element  33  is shaped as a clips-element  33   a.    
         [0042]    The casing  31  may be attached to the first joining partner, whereas the rod-shaped element is mounted to the second joining partner using a screw-element  35   a.  Therefore the rod-shaped element  32  is initially inserted in the casing  31 . Prior to this an adhesive element  40  (not shown in detail) is brought into the interior zone of the casing  31 . The rod-shaped element  32  with a head piece  32   a  assembles the casing  31  and at the same time dips into the adhesive element  40 . In order to completely encapsulate the adhesive element  40  a sealing-element  34  is attached to the rod-shaped element  32  in a collar-shaped way. The sealing-element  34  is rounded off with the opening of the casing  31  in its mounted state, as the adhesive element  40  is completely enclosed between the rod-shaped element  32  and the casing  31 . Subsequently the casing element  33 , being shaped as a clips-element  33   a,  can be clipsed into the clips-casing  31   a,  as the snap-fits  36  can snap in place into the snap-opening  37 . 
         [0043]    In order to assure the correct position of the clips-element  33   a  at the clips-casing  31   a,  the clips-casing  31   a  comprises an assembling provision  31   d  fitting into geometric recesses  33   d  within the clips-casing  31   d.  The holding device  30  in its assembled state is shown in  FIG. 4 , in which the clips-element  33  is already mounted to the clips-casing  31   a.  In this state only the rod-shaped element  32  protrudes from its holding device  30 , which is penetrating through an opening  38  within the second joining partner  20  and is screwed onto the screw-element  35   a.  Thereby the press-collar  32   c,  being assembled to the rod-shaped element  32  in a saucer-shaped manner, actuates into a recess, which is located on the rear side of the second joining partner  20  surrounding the opening  38 . 
         [0044]    The press-collar  38  comprises a knurled skin surface, whereby the knurl geometry is pressed into the second joining partner  20  in a way that the screw-element  35   a  is screwable onto the rod-shaped element  32  without co-rotating with the rod-shaped element  32 . Contrary to the described order the rod-shaped element  32  can first of all be mounted to the second joining partner  20  to afterwards insert the rod-shaped element  32  with its head piece  32   a  into the clips-casing  31   a  to subsequently clips the clips-element  33   a  to the clips-casing  31   a.  Afterwards the second joining partner  20  is adjusted relative to the first joining partner (not shown, but permanently fixed to the casing  31 ). Subsequently a transformation of states of the adhesive element  40  occurs as the rod-shaped element  32  is forming a rigid connection to the casing  31  and therewith to the first joining partner. 
         [0045]    In  FIG. 5  an embodiment of a holding device  30  in its assembled state is illustrated, in which the casing element  33  in shape of a clips-element  33   a  is already clipsed to the casing  31  in shape of a clips-casing  31   a.  Accordingly, the rod-shaped element  32 , shown with the screw-element  35   a,  protrudes out of the holding device  30 , at which the second joining partner  20  can be assembled. In this state, in which the rod-shaped element  32  is already adjusted relative to the casing  31 , the adhesive element  40  needs to be transformed in its cured state. Hereunto an induction coil unit  50  is shown. It is designed in a bracket-, U-shaped manner and almost completely encloses the holding device  30 . The induction coil unit  50  exhibits electric cables of a meandering course, which comprises two connecting ends connectable to an adequate current of an induction current generator. Using an induction current an electromagnetic field is developed which may lead to a heating of the adhesive element  40 , in a direct way or via neighboring construction elements like the casing  31  or the rod-shaped element  32 . 
         [0046]      FIG. 6   a  shows a sectional arrangement drawing of the assembly of the holding device  30  and the induction coil unit  50  according to  FIG. 5 . The sectional arrangement illustrates the first part of the receiving composition  31  of the holding device  30  which is achieved as the casing  31  and particularly as the clips-casing  31   a.  A casing element  33 , particularly accomplished as a clips-element  33   a,  is clipsed on top of the clips-casing  31   a.  The adhesive element  40  is limited by the interior of the clips-casing  31   a  and the rod-shaped element  32  with its head piece  32   a.  The opening of the casing  31  is sealed via a sealing-element  34 , completely enclosing the adhesive element  40 . The drawing further illustrates a joining arrangement of the rod-shaped element  32  at the second joining partner  20 , whereby a press-collar  32   c  is pressed into a recess within the second joining partner  20 . The screw-element  35   a  is screwed to the spindle section of the rod-shaped element  32 , pressing the press-collar  32   c  into the recess of the second joining partner  20 . Is the second joining partner  20  adjusted to the first joining partner  10 , which exhibits a permanent joint, the adjusting movement between the rod-shaped element  32  or the head piece  32   a  respectively and the clips-casing  31   a  is compensated. Subsequently the induction coil unit  50  is supplied with a current and the adhesive element  40  is heated by the generation of an eddy current in one of the involved assembly parts like the casing  31   a,  the rod-shaped element  32  or the adhesive element  40  itself and the adhesive element  40  is thus transformed into its second, cured state. Therewith a rigid connection between the second joining partner  20  and the first joining partner, represented by the casing  31 , develops. 
         [0047]    In order to build a form-closed interaction between the rod-shaped element  32  and the adhesive element  40 , the in the adhesive element  40  protruding section of the rod-shaped element  32  comprises a rear intersection area  32   b,  which is exemplarily shown as the back side of the head piece  32   a.  Therewith the area of contact between the rod-shaped element  32  and the adhesive element  40  is enlarged. 
         [0048]      FIG. 6   b  is presenting another alternative for a heat input into the adhesive element  40 . A heating-element  60  is inserted into the casing  31 , built by a clips-casing  31   a.  This may alternatively be also inserted in the casing element  33 , represented by a clips-element  33   a,  whereby an arrangement of the heating-element  60  in the rod-shaped element  32  is conceivable as well. The heating-element  60  is illustrated in a coiled shape heating through the application of an electric current. To transform the adhesive element  40  in its second, cured state, the heat-generation in the casing  31  is transmitted thereto. 
         [0049]      FIG. 6   c  illustrates an alternative embodiment of the assembly of the heating-element  61  straight within the adhesive element  40 . The heating element  61  can in the same manner be formed in a coiled shape  61  and can transmit heat to the adhesive element  40  upon application of an electric current. The coiled shape is generating an ohmic resistance leading to a heating of the heating-element  60  upon a sufficiently large current conduction. The illustrated assembly of the heating-elements  60  and  61  can be formed in a closed coiled shape to build a kind of secondary coiled shape similar to a transformer. An induction tension, leading to a heating, is generated in the heating-elements  60 ,  61 , arranged as closed coils, if the induction coil unit  50  is arranged and supplied with a current. Therewith the advantage is achieved that neither circuit points from the holding device  30  nor from the adhesive element  40  must be carried out. 
         [0050]      FIGS. 7 and 8  present another embodiment of the holding device  30 , in a dismantled, flying view in  FIG. 7  and in a mounted state in  FIG. 8 . The holding device  30  comprises a casing  31  shaped as a bayonet-casing  31   b.  This can form a bayonet-seal together with a casing element  33 , being shaped as a bayonet-element  33   b.  The bayonet-element  33   b  can be moved along the line of the axis of symmetry of the holding device  30 , composed of the longitudinal extension of the rod-shaped element  32 , in the direction of the bayonet-casing  31   b.  The bayonet-elements  39  thereby attain the bayonet-recess  42  and through a subsequent twisting of the bayonet-element  33   b  on top of the bayonet-casing  31   b  a sustained connection is established. The rod-shaped element  32  is fixed to the inner surface of the bayonet-casing  31   b,  e.g. via the sealing-element  34  at the rod-shaped element  32 . The second joining partner  20  can be connected to the rod-shaped element  32  by a subsequent screwing of the screw-element  35  to the spindle-like end of the rod-shaped element  32 . 
         [0051]      FIG. 9  is illustrating an alternative embodiment of a rod-shaped element  32  comprising a tap hole  41  at its end in which the screw-element  35   b  is screwable. The shown embodiment of the holding device  30  matches with the bayonet-casing  31   b  together with a bayonet-element  33   b,  whereby the specific embodiment of the rod-shaped element  32  comprising a tap hole  41  is suitable for every other represented shape of the holding device  30 . 
         [0052]      FIG. 10  illustrates another embodiment of the holding device  30  comprising a casing  31  which is shaped as a screw-casing  31   c.  A screw-element  33   c  can be screwed to the screw-casing  31   c  building a casing element  33 . 
         [0053]      FIG. 11  represents a holding device  30  according to  FIG. 10  in its mounted state in which the screw-element  33   c  is already screwed to the screw-casing  31   c.    
         [0054]    The invention is not limited to the embodiments described above. More preferably a variety of options is conceivable which exercise the represented solutions in generally different embodiments. Any characteristic and/or advantage mentioned in the claims, the description or the figures, including structural details, spatial arrangements and procedural steps, are substantial for the invention either among themselves or in any combination.