EP1409174B1 - Adhering anchor and device for deforming areas of a vehicle body - Google Patents

Abstract

The invention relates to a device for deformation, in particular for restoring deformed bodywork regions, having a pulling device to which an adhesive bolt can be fastened, the adhesive bolt being fastenable by adhesion to the bodywork region to be deformed.

Description

The invention relates to a device for deformation, in particular for the recovery of damaged body areas, which is advantageously used for the interests of the motor vehicle bodywork, according to the preamble of claim 1 (see, for example, US-A-5 203 196).

A similar device is disclosed in EP-A-0 783 926.

The invention further relates to a Klebanker according to claim 16.

Especially in the repair area of the motor vehicle bodywork is the most effective and high-quality repair of body damage in an increasingly difficult environment of great importance.

Increasingly, today's vehicles use various materials, such as aluminum, plastics and fiber-reinforced plastics, which are difficult to machine during repair by conventional means. In addition, sheets with various thicknesses are used, whereby the force to be applied for a recovery from deformation is very different and certain manual methods, such as the hammering back of the dent with a hammer or a tensile hammer, are becoming increasingly difficult.

For example, in US Pat. No. 5,203,196 a traction device for removing small denting on the bodywork area is described. The pulling device comprises a pulling tool, with which a tensile force can be exerted on a pull rod, wherein the pull rod can be fastened to the body region to be retracted by gluing.

A disadvantage of this device, however, is that a recompaction of the dents is possible and an exact repair can not be guaranteed.

The form of conventional so-called soft repair is carried out according to current knowledge in the normal case with different direct iron from below the sheet by pushing back the sheet.

It is also offered an adhesive technique. This technique provides for the repair of large dents with a pulling hammer. However, the adhesive dots used are too large for the small hail cells and have therefore often been appropriately cut to reduce their diameter. Especially with bottom or inaccessible from the bottom of sheet metal sections, this method was used. This technique works with appropriate practice, but has serious shortcomings. The hitting with the pulling hammer is too inaccurate, which means that there is a risk that is pulled with too little or too much force, It must therefore be relatively often the dent additionally processed. This means that the dent had to be greatly overturned in many cases and then had to be repulsed with the Teflon stander, which usually required a time-consuming subsequent grinding and polishing.

Furthermore, due to frequent tilting of the large tug, the adhesive drops were so affected that they break off. Likewise, the case often occurs that in Zughammerschläge, already painted and filled cars lose the paint partially or the paint and the filler is knocked off with.

The present invention is intended to allow for deformations, such as re-deformations or dent repairs, without having to be painted and without a Dismantling example of the headliner or other attachments is necessary. Furthermore, a quick and accurate repair from the outside against the sheet, to be supported with very low environmental impact.

This object is achieved in the highest surprisingly simple way already with a device having the features of claim 1. Compared to a rebound by hitting, a defined pulling is possible here, because instead of a percussion device, a pulling device is used, which allows an always controlled power transmission without significant force peaks and with an exact stroke. For this purpose, a pulling device is used, on which a Klebanker can be fastened, wherein the Klebanker is attached to the body region to be deformed by gluing.

Of great advantage is that the Klebanker can be made so small in its sheet metal facing area that even detected by hailstorm dents can be detected in their depth and deformed back.

For this purpose, it is advantageous if the Klebanker comprises a substantially frusto-conical Klebpfropf, which has a structured adhesive surface on the underside, as increased by the structured adhesive surface, the effective available for an adhesive application area and thereby a much higher tensile force can be absorbed and by the truncated cone shape is provided a very high stability.

Here, it is also advantageous if the structured adhesive surface has radially extending ribs or the structured adhesive surface has a corrugation.

If the underside of the Klebepfroppfens has a receding outward in the pulling direction curvature, the tool can also be used at rounded areas of the body or carried out at an angle to the surface damage oblique pulling for optimal recovery.

Depending on the damage, the underside of the sticky plug is round, oval, angular, square, rectangular, trapezoidal, polygonal or arbitrarily shaped by the user to allow the best possible force to be transmitted to the damaged body area.

In a cost-effective, the counter-holder in the middle has a bore through which the threaded rod can be guided.

According to the invention, the counter-holder has on each of its two sides a through-groove in order to enable a lateral displacement of in each case one support plate, which is held in each case in a through-groove.

To support an oblique pulling or pulling on rounded trunk areas, the support plates have articulated feet with integrated threaded rods.

A very safe and secured against slipping pull is made possible when the support plates have a rubber pad on the underside and in the joint of the joint foot are both pivotable and rotatable. This also greatly improves the ease of handling of the device.

Alternatively, the support plate on the underside of a squeegee or a magnetic base.

If the joint of the joint foot comprises a ball joint whose pivot point is close to the support surface of the support plates and preferably a flattened ball head with a flattened ball head recording whose effective pivot point lies in the plane of the body region to be machined, an oblique lateral pulling can take place without it comes to essential forces, which try to change the direction of pull.

Great temporal advantages arise when using a Klebankers with a device for applying and / or detachment of the adhesive on and / or from the bodywork area to be processed. Such a glue bank may, for example, comprise a device for heating a hot melt adhesive, for example a through-hole sleeve in which lateral pushers are arranged to longitudinally and reversibly block a hot-melt adhesive cartridge in the forward direction.

Further time savings result from a device for cooling the hot melt adhesive, which preferably comprises a device for supplying a coolant, such as air or coolant.

An almost completely automated motion sequence during the recovery is made possible by a device for the Triggering the heating comprising, in particular, an electrical switch or a piezoelectric element which triggers an electronic circuit for controlling the heating from a certain pressure force.

Very high heating rates are made possible by a device for detecting the temperature of the hot melt adhesive, which is assigned to an electrical control device for controlling the temperature of the adhesive bank.

A further reduction of the time sequence is made possible by a device for removing the heated hot melt adhesive.

Fig. 1

eine perspektivische Ansicht einer ersten erfindungsgemäßen Ausführungsform einer Vorrichtung zur Verformung von Karosseriebereichen in einer Explosionsdarstellung schräg von vorn,

Fig. 2

eine perspektivische Ansicht der Fig. 2 dargestellten ersten erfindungsgemäßen Ausführungsform in zusammengebauter, benutzungsbereiten Stellung,

Fig. 3

eine perspektivische Ansicht der in Fig. 1 und 2 dargestellten ersten erfindungsgemäßen Ausführungsform in zusammengebauter, benutzungsbereiten Stellung schräg von oben,

Fig. 4

eine Querschnittsdarstellung eines Klebankers mit einer Vorrichtung zum Zuführen von Klebstoff und einer elektrisch gesteuerten Vorrichtung zur Beheizung des Klebstoffs,

Fig. 5

eine Querschnittsdarstellung eines gegenüber dem in Fig. 4 dargestellten weiterentwickelten Klebankers mit einer Vorrichtung zum Zuführen von Kühlmittel zum Abkühlen des Heißklebers,

Fig. 6

eine Querschnittsdarstellung eines nochmals gegenüber den in Fig. 4 und Fig. 5 dargestellten Klebankern weiterentwickelten Klebankers mit einer Vorrichtung zum Ablösen des Heißklebers,

Fig. 7

eine Querschnittsdarstellung einer weiteren Ausführungsform eines Klebankers mit einer Vorrichtung zum Zuführen eines flüssigen, einkomponentigen Klebstoffs,

Fig. 8

eine Querschnittsdarstellung einer nochmals weiteren Ausführungsform eines Klebankers mit einer Vorrichtung zum Zuführen eines flüssigen, mehrkomponentigen Klebstoffs.

The invention will be explained in more detail below with reference to preferred embodiments and with reference to the accompanying drawings.
Show it:

Fig. 1

a perspective view of a first embodiment according to the invention of an apparatus for deformation of body regions in an exploded view obliquely from the front,

Fig. 2

2 shows a perspective view of the first embodiment of the invention shown in assembled, ready-to-use position,

Fig. 3

2 is a perspective view of the first embodiment according to the invention shown in FIGS. 1 and 2 in an assembled, ready-to-use position obliquely from above,

Fig. 4

a cross-sectional view of a Klebankers with a device for supplying adhesive and an electrically controlled device for heating the adhesive,

Fig. 5

4 is a cross-sectional view of a further developed adhesive banker with respect to that illustrated in FIG. 4 with a device for supplying coolant for cooling the hot-melt adhesive,

Fig. 6

3 is a cross-sectional view of an adhesive bank further developed with respect to the adhesive bank illustrated in FIGS. 4 and 5, with a device for detaching the hot-melt adhesive;

Fig. 7

a cross-sectional view of another embodiment of a Klebankers with a device for supplying a liquid, one-component adhesive,

Fig. 8

a cross-sectional view of yet another embodiment of an adhesive bank with a device for supplying a liquid, multi-component adhesive.

The invention will be described in more detail below, wherein the figures are not drawn to scale for purposes of clarity.

Hereinafter, a first embodiment of the device according to the invention, which is shown in Fig. 1 in an exploded view, will be described.

The generally designated 1 device comprises a traction device 2, which is adapted to a Klebanker 3 in the direction of arrow A, thus defined away from a body region to be machined 9 and pull smoothly.

A further automatic device for pulling the adhesive bank 3 is described, for example, in European Patent Publication No. EP 94,113,097.3, the contents of which are also incorporated herein by reference in their entirety.

Furthermore, the Klebanker 3 is an independent hanhab- and tradeable object with which many advantages of the invention with other already on the market traction devices can be achieved.

The adhesive 3 further comprises a substantially frusto-conical Klebepfropf 5, which has a structured adhesive surface on its underside 6, through which the available surface and thereby effectively achievable tensile forces are increased.

In the embodiments of the adhesive anchor 3 shown in FIGS. 4 to 6, the underside 6 has radially extending ribs 7, through which, for example, heated hot-melt adhesive 8 can pass from a heated, inner, hot zone to the outside and thus fine channels between the bottom 6 and the body panel 9 are generated, in which high bond strengths are achievable.

Furthermore, the adhesive plug 5 by the threaded rod 4, which extends through an opening 10 which passes through a counter-holder 11, with a wing nut 12 in Direction and opposite to the direction of the arrow A held displaceable.

The counter-holder 11 comprises a web 13 with two longitudinal grooves 14, 15, in which support plate 16, 17 are laterally displaceable and held with wing nuts 18, 19 lockable. For this purpose, the support plates 16, 17 corresponding threaded rods, which merge into joints 20, 21.

In a preferred embodiment, the joints 20, 21 ball joints and, as shown in the right hinge 21 of FIG. 1 can be seen, a flattened ball head 22 and a flattened ball head receptacle 23, so that the effective rotation and pivot point of the ball joint approximately lies in the plane of the bodywork area to be processed 9.

On the undersides 24, 25 of the support plate 16, 17, a rubber pad is applied or are alternatively suction feet or magnetic feet interchangeably mounted to always ensure a safe and free from slipping pulling process.

In this way, a secure support on rounded body portion is made possible, in which the underside 6 of the Klebankers 3 also does not have to be flat, but depending on the embodiment may have corresponding, in particular in the pulling direction receding bends or fillets.

Furthermore, the adhesive plug 5 is made in a further preferred embodiment of a machinable by cutting plastic, so that the bottom 6 any, For example, round, oval, square, quadrilateral, rectangular, trapezoidal or polygonal forms, which has been optimally adapted to the particular damage by the user.

A repair is generally performed in the first embodiment of the invention as follows.

The area to be treated is cleaned and a small, about hazelnut-sized heated plug of hot melt adhesive applied.

The plug is then preferably placed centered in the dent, wherein the hazelnut core-sized adhesive from the hot-glue gun is placed on the indentation. The wing nut with internal thread is now screwed on.

After the adhesive has cooled (after approx. 1 minute), the threaded rod and thus the dented sheet are pulled upwards (corkscrew effect) by turning the wing nut against the counterholder. Since this repair work is preferably done with a neon light, which is placed so that the light stripe reflected in the dent of the bend of the dent accordingly, can be very well observed as the dents deformed by the targeted rotations of the mother. It can therefore always be observed exactly how the dent is deformed and when this process must end, in order to exclude excessive overstretching of the sheet in contrast to the Zughammerverfahren in the invention.

If the neon light strip forms the usual straight line, the denting has disappeared and the target is reached.

By heating the plug by means of hot air blower, the Dellenausziehgerät is removed. The site can now be completely cleaned or, if necessary, also be reworked.

This application makes it possible that any number of threaded rods / adhesive drops are glued one after another and processed with the same counter-holder and wing nut.

About the threaded rod, these are introduced on both sides of the counter-holder in the milling groove and screwed with wing nuts.

Referring now to Figures 4 to 6, wherein Fig. 4 comprises a Klebanker 3 with a device for applying the adhesive 26, this adhesive is preferably a hot melt adhesive and is preferably supplied as a hot melt adhesive cartridge 26 which in an upper sleeve 27 with a plate spring 28 in the direction of arrow B longitudinally displaceable, but opposite to the direction of the arrow B is held blocking.

If the sleeve 27 is moved in the direction of the arrow B on the sheet when placing the Klebankers 3 on the sheet to be processed 9, the front parts of the hot melt adhesive cartridge 26 comes into contact with the plate 9 and moves the diaphragm spring against the direction of arrow B. and thereby triggers an electrical switch 29 or exerts a compressive force on a piezoelectric element 30, which is detected by means of feed lines 31 by an electronic circuit, not shown in the figures.

The electrical circuit controls a device for heating the hot melt adhesive 32, which in a further preferred embodiment comprises a thermoelectric element 33, with which a very fast heating process is carried out in a controlled manner.

The heated hot melt adhesive 8 then occurs upon further pressing of the upper sleeve 27 in the direction of arrow B laterally between the ribs 7 with displacement of the sleeve 27 relative to the lower sleeve 34, so that a precisely defined adhesive is applied.

The amount of adhesive to be applied can be adjusted by adjusting the displacement of the sleeve 27 by means not shown in the figures, attacks.

After heating, metallic cooling fins 35 arranged on the exterior of the adhesive bank 3, which are in very good thermal contact with the fins 7, ensure rapid cooling and rapid hardening of the hot melt adhesive. This cooling can be indicated to the user by optical or acoustic signals through the electronic device, measuring the temperature of the thermocouple 33, so that always a safe pulling operation can be achieved.

The following introduced pulling pulls the sleeve 27 relative to the sleeve 34 under the additional force of a compression spring 36 in an upper end stop not shown in the figures, which then causes an initiation of the tensile forces in the body region 9.

A withdrawal of the hot-melt adhesive cartridge 26 is prevented by a plate spring 37, which may be slotted as the plate spring 28, in the lower sleeve 34.

After the drawing process to the desired recovery or to a desired, defined overstretching, the hot melt can be heated again with the device 32 and the Klebanker 3 are removed in a simple manner from the plate 9.

If, for example, the device described by the manufacturer as Airpuller, described in EP-A 0 640 415, is used for this process, escaping air from the pneumatic system can be used in order to achieve accelerated cooling. When using the Airpullers its advanced electronic control device can take over all time control operations, such as adhesive application by advancing the Klebankers 3, its heating and cooling, the subsequent drawing and reheating to solve the Klebankers automatically or set by the user with appropriate time parameters.

When using the Airpullers can be carried out by heating also a jerky rotation of the adhesive bank 3 instead of the release of the adhesive by means of which this Klebanker is separated from the sheet metal portion 9.

Even without the use of the Airpullers but already the simple blowing of the cooling fin 35 with a pneumatic nozzle leads to a rapid cooling.

Without the use of such pneumatic cooling options, either in the workshop area available liquid coolant are applied to the cooling fins 35 or a, for example, in Fig. 5 shown own electric cooling device in the form of a ventilation fan 38 are used.

This blower 38 is also controlled by the electronic control device and can be operated in response to the temperature detected by the thermoelectric element 33 or by a timer.

Furthermore, an embodiment shown in Fig. 6 comprises a pivotable in the direction of the arrow C elastic spatula 39, with which the still hot adhesive can be removed after detachment of the adhesive anchor 3 in a simple manner from the sheet 9. It is within the scope of the invention to design this spatula 39 heatable.

Two further advantageous embodiments of the adhesive bank 3 according to the invention are shown in FIGS. 7 and 8, in which adhesive cartridges with fast-curing adhesives are used instead of the hot-melt adhesive.

In the embodiment shown in Fig. 7, an adhesive cartridge 40 is used with a fast-curing liquid one-component adhesive, for example an acrylate or methyl acrylate-based superglue.

The cartridge 40 comprises an adhesive chamber 41, in which a punch 42 is held longitudinally displaceable in the direction of the arrow B. With each movement of the upper sleeve 27, an upper cap 43 connected to the punch 42 is displaced downward by a defined amount and thereby pushes the punch 42 in the adhesive chamber 41, whereby from this at the lower end through a nozzle 50, a defined portion of adhesive is discharged, which occurs between the bottom 6 of the adhesive 3 and the surface of the sheet 9 and thereby creates a predefined adhesive surface.

In place of the cartridge 40 may also be a commercial, filled with adhesive syringe are used, which is first as shown in Fig. 7 is inserted into the anchor 3 and over which subsequently the cap 3 is pushed. The cap 3 is moved in substantially the same manner as described in the hot-melt adhesive cartridge.

After curing of the adhesive, which takes place in a few seconds, the pulling process can be carried out.

At the end of the pulling process can be effected by a jerky rotation of the Klebankers 3 by means of the Airpullers its shearing and the device according to the invention is ready for use again.

In another advantageous embodiment shown in FIG. 8, the adhesive cartridge comprises a plurality of, preferably two adhesive chambers 44, 45, which each have a punch 46, 47, which is connected to a cap 48. In this embodiment, when the cap 48 is moved with the punches 46, 47 in the direction of the arrow B, the various components, preferably hardener and resin, of a multi-component adhesive are mixed together by the closely spaced nozzles 48, 49 and a rapid curing process is achieved of the adhesive.

Also in this embodiment, a release of the Klebankers 3 can be made by shearing.

The invention is not limited to be used only in painted sheets application, but it is also also in the context of deforming even bare metal sheets or primed or provided with putty areas.

Claims (28)

1. Device for shaping, particularly for reshaping deformed areas of a vehicle body (9), comprising an adhering anchor (3) and
   a drawing device (2, 11), on which the adhering anchor (3) is adapted to be fixed,
   wherein the adhering anchor (3) is further adapted to be fixed to the area of the vehicle body to be shaped by means of adhesion, characterised in that
   the drawing device (2, 11) comprises a holding-up member (11) which comprises a bore (10) for receiving the adhering anchor (3) and bearing plates (16, 17) spaced apart from each other with articulated feet (20, 21), wherein the adhering anchor (3) comprises an adhesive plug (5), the adhesive plug (5) is connected to a threaded rod (4), wherein the threaded rod (4) cooperates with a nut (12) for purposeful rotation for reshaping and characterised by an elongated holding-up member (11) with a web (13) which is made of plastic or metal, wherein the holding-up member comprises a passage groove (14, 15) on two sides respectively in order to facilitate lateral displacement of respective bearing plates (16, 17) which are respectively held in a passage groove (14, 15).
2. Device according to claim 1, characterised in that the adhering anchor (3) comprises a structured adhesive area on its lower side.
3. Device according to claim 1 or 2, characterised in that the structured adhesive area (6) increases the effective area available for adhesive application.
4. Device according to claim 1, 2 or 3, characterised in that the structured adhesive area (6) comprises radial ribs (7).
5. Device according to claim 1, 2 or 3, characterised in that the structured adhesive area (6) comprises corrugation.
6. Device according to one of the claims 2 to 5, characterised in that a butterfly nut (12) is assigned to the threaded rod (4).
7. Device according to one of the claims 2 to 6, characterised in that the lower side (6) of the adhesive plug (5) comprises a camber going down outwardly in the direction of drawing.
8. Device according to one of the preceding claims, characterised in that the lower side (6) of the adhesive plug (5) is shaped so as to be round, oval, angular, quadrangular, rectangular, trapezoidal, polygonal or as required by the user.
9. Device according to one of the preceding claims, wherein the holding-up member (11) comprises a bore (10) in the middle, through which a threaded rod (4) can be passed.
10. Device according to claim 1, characterised in that the bearing plates (16, 17) comprise articulated feet (20, 21) with integrated threaded rods.
11. Device according to claim 1 or 10, characterised in that the bearing plates (16, 17) comprise a rubber bearing on their lower side and are adapted to be pivoted and rotated in the joint (20, 21) of the articulated foot.
12. Device according to claim 1 or 10, characterised in that the bearing plates (16, 17) comprise a suction foot on their lower side.
13. Device according to claim 1 or 10, characterised in that the bearing plates (16, 17) comprise a magnetic foot on their lower side.
14. Device according to one of the claims 10 to 13, characterised in that the joint (20, 21) of the articulated foot comprises a ball head joint (22, 23), whose pivot point lies in proximity to the standing area of the bearing plates (16, 17) and preferably comprises a flattened ball head with a flattened ball head receiving area whose effective pivot point lies in the plane of the areas of the vehicle body (9) on which work is to be carried out.
15. Device according to one of the preceding claims, further characterised by an adhering anchor (3) which comprises a device for applying the adhesive to and / or removing the adhesive from the area of the vehicle body on which work is to be carried out.
16. Adhering anchor (3) for a device according to one of the preceding claims, characterised in that the adhering anchor comprises a device for applying the adhesive to the area of the vehicle body on which work is to be carried out.
17. Adhering anchor according to claim 16, characterised by a device (32) for heating a thermal adhesive.
18. Adhering anchor according to claim 17 or 18, further comprising a sleeve (27, 34) with a passage bore in which lateral push elements (28, 37) are arranged in order to hold a thermal adhesive cartridge in a displaceable way in the forward direction (B) towards the area of the vehicle body (9) on which work is to be carried out and in a locking way in the reverse direction.
19. Adhering anchor according to claim 16, 17 or 18, characterised by a device (35, 38) for cooling the thermal adhesive (8).
20. Adhering anchor according to claim 19, further characterised by a device (38) for supplying a coolant.
21. Adhering anchor according to claim 19 or 20, comprising metal cooling ribs (35) arranged radially on the outside of the adhering anchor (3), a device (38) for the supply of air and / or a coolant.
22. Adhering anchor according to claim 21, characterised in that the cooling ribs (35) are thermally connected to ribs (7) on the lower side (6) of the adhering anchor (3).
23. Adhering anchor according to one of the claims 17 to 22, further characterised by a device for triggering the heating, comprising in particular an electrical switch (29) or a piezoelectrical element (30) which triggers an electronic circuit for controlling the heating with effect from a certain pressing force.
24. Adhering anchor according to claim 23, further characterised by a device (33) for detecting the temperature of the thermal adhesive (8) which is assigned to an electrical control device for controlling the temperature of the adhering anchor (3).
25. Adhering anchor according to one of the claims 16 to 24, further comprising a device (39) for removing the heated thermal adhesive.
26. Adhering anchor according to claim 25, characterised in that the device (39) for removing the thermal adhesive comprises a pivotable, preferably heatable, spatula (39).
27. Adhering anchor according to claim 16, characterised by an adhesive cartridge which emits a defined amount of adhesive when the adhering anchor is placed on the area of the vehicle body (9) on which work is to be carried out.
28. Adhering anchor according to claim 27, characterised in that the adhesive cartridge comprises a plurality of adhesive chambers with a plurality of components of a multi-component adhesive.

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