EP0552751A1 - Arrangement for partial or complete removal of joint-filling material - Google Patents

Abstract

For partial or complete, specific removal of filling material from joints between wall-structure elements, in particular for the removal of old mortar and plastic-joint material, the invention provides an apparatus which has a guide unit which is carried by an adjustable carrying apparatus (1; 55), can be adjusted with respect to said carrying apparatus (1; 55) and exhibits a rectilinear guide (8; 15; 31; 62). On said guide (8; 15; 31; 62) there is displaceably arranged a carriage (9; 16; 32; 61) which carries at least one water-jet nozzle (11; 22; 45; 67; 76, 77, 78) which runs in the direction of the joints and at the rear end of which a pressure hose is connected. The carriage (9; 16; 32; 61) can be displaced along the guide (8; 15; 31; 62) by means of a motor. In this arrangement, the guide (8; 15; 31; 62) can be adapted to the progression of the joint by swivelling. It may also, however, rest on, run vertically on and be displaceable along a horizontal guide rail (58). The water-jet nozzle or nozzles (11; 22; 45; 67; 76, 77, 78) may be mounted on a carrying arm (10; 19; 43; 49) which can be displaced transversely to the guide (8; 15; 31; 62) and gives the water-jet nozzle or nozzles (11; 22; 45; 67; 76, 77, 78) a sinusoidal movement path. <IMAGE>

Description

The invention relates to a device for the complete or partial targeted removal of filler material from joints between wall components.

There is a great need to remove the filler material from joints between wall components. This results e.g. when renovating old structures that have natural stone or other masonry. The old mortar must be removed in whole or in part so that proper grouting can then be carried out again. In the same way, there is a need to remove plastic-based filler material from joints between wall building boards, because this material e.g. has become brittle due to signs of aging and has lost its tightness.

As far as the removal of old mortar is concerned, work has so far been done with hammer and chisel or with angle grinders and similar tools. Work of this kind is very time-consuming and, moreover, does not lead to the same clearing of the joints throughout. When cutting joints with filler material based on plastic, various cutting devices have been used up to now. Here, too, the work required is considerable and the result of the clearing out is by no means optimal.

The object of the present invention is now to design a device of the type mentioned in such a way that it easily closes with a simple structure is to be handled and at the same time very efficiently leads to a uniform clearing of the joints in accordance with the specifications.

This object is achieved according to the invention in a device of the type mentioned at the outset in that it has a guide unit, which is carried by an adjustable carrying device and is, on the other hand, adjustable, with a linear guide, in that a slide is slidably arranged on the guide and has a jet head with at least one on the Joints directed water jet nozzle, at the rear end of which a pressure hose can be connected.

The carrying device can be fixed on a conventional scaffolding or else on a construction crane or the like. The guide unit with its guide can then be brought into alignment with the course of the joints to be cleared. In the case of a straight-line joint course, the slide with the nozzle or the nozzles can then be moved along the guide; the water jet nozzle is connected to pressurized water with a pressure of up to approximately 2,000 bar via the pressure hose. The working area of the nozzle can be captured on channel television and displayed at a suitable location.

The device according to the invention can also be designed such that the carrying device is a carriage which is guided movably on two guide tubes or rails which run parallel to one another and which forms a straight guide for the carriage carrying the jet head for the nozzle or nozzles.

The device according to the invention can also be designed such that the jet head is connected to the slide via an adjustable parallel joint arm.

The device according to the invention can also be designed so that the carriage is held on rollers on the guide tubes or rails.

The device according to the invention can also be designed such that a drive wheel is mounted on the trolley, which is in frictional contact with one of the guide tubes or rails.

The device according to the invention can also be designed so that the Carrying device is a multi-link swivel arm that can be fixed on a scaffolding. This allows the guide to be precisely aligned without further ado.

The device according to the invention can also be designed such that the carrying device is a clamping device which can be fixed on a scaffolding and is connected to the guide unit. The carrying device can be particularly simple. The entire device can then be accommodated on-site on the scaffold and extend beyond a scaffold bay.

The device according to the invention can also be designed such that the guide can be pivoted in a plane parallel to that of the wall elements. The guide unit is particularly light and yet universally applicable.

The device according to the invention can also be designed such that the guide of the guide unit runs vertically and is displaceable along a horizontal guide rail which is connected to the clamping device. The guide need not be pivoted during operation of the device. When working horizontally, it is only moved along the horizontal guide rail, while when working vertically it is only moved along the guide. By combining movements along the horizontal guide rail and along the guide, any movement paths can be achieved.

The device according to the invention can also be designed in such a way that the horizontal guide rail is formed from guide pieces which can be attached in the longitudinal direction and can be fixed on the scaffolding. Thus, the horizontal guide rail can be extended as desired, so that correspondingly long joints can be processed essentially without interruption. The displacement of the guide along the horizontal guide rail is advantageously carried out by a motor drive.

The device according to the invention can also be designed such that the carriage is provided with a motor for moving along the guide. In this way, the clearing of the joints can be accelerated and considerably simplified for the operator.

The device according to the invention can also be designed so that the Water jet nozzle or the water jet nozzles is or are mounted on a support arm which can be displaced transversely or inclined to the guide in a plane parallel to the plane of the wall elements. To loosen the filler material of the joint, it can be advantageous to guide the water jet nozzle (s) not only in a straight line but also in a sinusoidal manner, i.e. on a movement path that results when the slide along the guide and the water jet nozzle transversely or inclined to the guide be moved. It may be advantageous to choose the 45 ° incline. Then, without swiveling the carriage, the same jet path results when the water jet nozzle is moved along a horizontal as well as along a vertical joint.

The device according to the invention can also be designed in such a way that the support arm can be pivoted about a pivot pin that runs normal to the plane of the wall components. This swiveling of the water jet nozzle (s) can be realized in a variety of ways. In principle, it can also be carried out by hand.

The device according to the invention can also be designed such that the support arm has an elongated hole into which an eccentric shaft coupled with a drive engages, which is adjustably mounted in the longitudinal direction of the elongated hole. The rotation of the eccentric shaft led to a pivoting of the support arm and thus to a displacement of the individual water jet nozzle in the respective joint. By shifting the eccentric shaft with respect to the pivot pin, the amplitude of the movement path of the respective water jet nozzle can be changed and adapted to the requirements of the individual case. It is also possible to guide the individual nozzle in a circular motion as it advances.

The device according to the invention can also be designed such that the eccentric shaft is supported on a rocker which is adjustable in its inclination with respect to the guide and runs parallel to the support arm, the support arm and rocker having the same pivot axis. Due to the adjustability of the tilt of the rocker, it is possible to shift the course of the movement path of the respective water jet nozzle parallel to the guide. In this way, the movement path can be adapted to the respective course of the joint, even if it is not straight.

The device according to the invention can also be designed such that the support arm has a tooth segment which runs concentrically to the pivot pin and into which a pinion of a reversing stepper motor engages. Here, a stepper motor swings the support arm and determines the amplitude of the movement path of the respective water jet nozzle.

The device according to the invention can also be designed such that the center or 0 position of the pinion with respect to the tooth segment on the motor can be adjusted. In this way too, the course of the movement path can be adapted to the respective course of the joint.

The device according to the invention can also be designed such that the stepper motor can be adjusted with regard to the step length. In this way, an adaptation to the joint width is possible.

The device according to the invention can also be designed such that a suction box enclosing the nozzle or nozzles is provided, which is supported on the slide, the support arm or the rocker. The suction box can take up the water used and the material released from the joints, so that it can then be removed in the desired manner.

The device according to the invention can also be designed such that two nozzles are arranged one behind the other in the direction of the guide. Such a tandem arrangement can be useful to increase the possible working depth.

The device according to the invention can also be designed such that the nozzle or the nozzles are inclined with respect to the plane determined by the wall components. In this way, a desired profile can be created in the joints, which can be desired in many ways. It is e.g. possible to arrange two water pressure nozzles one behind the other so that they clear out the respective joint in a V-shape. This has proven to be particularly useful when clearing plastic joints between wall building panels, such as those used in prefabricated construction.

The device according to the invention can be designed so that the nozzle or nozzles can be adjusted with respect to their inclination with respect to the plane of the wall components. In this way, the desired profile can be determined according to the prevailing circumstances.

The device according to the invention can be designed such that the water jet nozzle can be moved on a circular path with a selectable diameter without rotation about its own axis. This has the advantage, inter alia, that the movement path of the water jet nozzle does not change even if the support arm runs at different angles with respect to the individual joints.

The device according to the invention can be designed such that at least two nozzles with different eccentricities with respect to the axis of rotation of a rotatably mounted, driven nozzle holder are provided. This results in an advantageous, rounded course of the nozzles and the jets emerging from them

Finally, the device according to the invention can be designed such that at least one of the nozzles can be closed by itself. The nozzle or nozzles can thus be activated, the circular path of which is optimal for processing the respective joint.

Fig. 1

eine Draufsicht auf eine Ausführungsform der erfindungsgemäßen Vorrichtung vor einem Mauerwerk,

Fig. 2

eine Seitenansicht auf eine Ausführungsform der erfindungsgemäßen Vorrichtung mit Wippe und Exzenterwelle,

Fig. 3

eine Draufsicht auf die Ausführungsform gemäß Fig. 2,

Fig. 4

eine Seitenansicht auf eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung mit Exzenterwelle,

Fig. 5

eine Seitenansicht auf eine weitere Ausführungsform der erfindungsgemäßen Vorrichtung mit einem motorangetriebenen Tragarm.

Fig. 6

eine Seitenansicht einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung mit einer Horizontalführungsschiene und einer normal dazu verlaufenden Führung,

Fig. 7

eine Ansicht der Vorrichtung nach Fig. 6 in Richtung des Pfeils A,

Fig. 8

einen Axialschnitt durch eine erfindungsgemäße Lagerung einer Wasserstrahldüse,

Fig. 9

eine Seitenansicht auf die Lagerung gemäß Fig. 8,

Fig. 10

eine Teilansicht einer Ausführungsform mit einem mehrere Düsen aufweisenden, drehbar gelagerten Düsenhalter,

Fig. 11

eine Ansicht auf den Düsenhalter gemäß Pfeil A in Fig. 10 und

Fig. 12

eine schematische Ansicht einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung mit parallel zueinander verlaufenden Führungsrohren.

In the following part of the description, some embodiments of the device according to the invention are described with reference to drawings. It shows:

Fig. 1

2 shows a plan view of an embodiment of the device according to the invention in front of a masonry,

Fig. 2

a side view of an embodiment of the device according to the invention with rocker and eccentric shaft,

Fig. 3

2 shows a top view of the embodiment according to FIG. 2,

Fig. 4

2 shows a side view of a further embodiment of the device according to the invention with an eccentric shaft,

Fig. 5

a side view of a further embodiment of the device according to the invention with a motor-driven support arm.

Fig. 6

2 shows a side view of a further embodiment of the device according to the invention with a horizontal guide rail and a guide which runs normally thereon,

Fig. 7

6 in the direction of arrow A,

Fig. 8

3 shows an axial section through a mounting of a water jet nozzle according to the invention,

Fig. 9

8 shows a side view of the bearing according to FIG. 8,

Fig. 10

2 shows a partial view of an embodiment with a rotatably mounted nozzle holder having a plurality of nozzles,

Fig. 11

a view of the nozzle holder according to arrow A in Fig. 10 and

Fig. 12

is a schematic view of a further embodiment of the device according to the invention with parallel guide tubes.

Fig. 1 shows a support device 1 which is fixed to a scaffolding 3 via a holder 2. The carrying device 1 also has arms 4 and a connecting piece 5. The connections between the holder 2, the arms 4 and the connecting piece 5 each permit a damped pivoting. They make it possible to bring a guide unit 6 connected to the connecting piece 5 into the desired aligned position via handles 7. The guide unit has a straight guide 8, along which a carriage 9 can be moved in a straight line. A support arm 10 is pivotally supported on the slide 9. This support arm carries at one end a water jet nozzle 11 which is connected to a pressure hose 12. The water jet nozzle is directed onto a wall 13 which has joints between wall components, for example building blocks, which are to be cleared.

The guide unit 6 can be aligned as desired, so it can in particular be directed both horizontally and vertically. All intermediate positions can also be implemented.

In the embodiment according to FIGS. 2 and 3, a guide 15 is provided on which a carriage 16 is seated. A carrier 17, in which a pivot pin 18 is mounted, extends from the carriage 16. On this pivot pin 18, on the one hand, the support 17 has a support arm 19 and, on the other hand, a rocker 20. The support arm 19 has an elongated hole 21 in its longitudinal direction. The support arm holds a water jet nozzle 22 at its right end in FIGS. 2 and 3, which is normally closed a masonry 23 is directed. An eccentric shaft 24 extends through the elongated hole 21. It has an eccentric 25 which is placed in slot 21. The eccentric shaft 24 is the shaft of an electric motor 26 which can be moved along the rocker 20. A handle 27 is connected to the electric motor 26.

Moving the electric motor 26 leads to a displacement of the eccentric 25 in the elongated hole 21. It follows that in the example shown, a displacement of the electric motor to the left leads to a greater swiveling out of the water jet nozzle, that is to say to a larger amplitude. Moving the electric motor 26 to the right reduces this amplitude. The rocker 20 has a handle 28 at its right end and carries a suction box 29 which encloses the area of action of the water jet nozzle 22 and can be provided with inspection holes and a drain opening. The suction box is open to the masonry 23 and lies against it with sealing strips 30.

The rocker 20 is provided with a counterweight 14 at its left end in FIGS. 2 and 3. It is damped by friction or separate damping cylinders. It can be moved up or down when the handle 28 is gripped, in order to enable a displacement of this movement path transversely to the guide 15 regardless of the amplitude of the movement path of the water jet nozzle 22. The support arm 19 can run parallel to a joint to be cleared or also inclined to it, preferably by 45 °.

The embodiment according to FIG. 4 also has a guide 31 with a slide 32 which can be moved along the guide 31 according to the arrow 33. The carriage 32 is provided with drive wheels 34 which are driven by a motor, not shown and cause a controlled movement of the carriage 32 along the guide 31.

An L-shaped arm 35 is fixed to the carriage 32 and has a section 36 running parallel to the guide 31. A guide piece 37 can be moved on section 36 according to arrow 38. The guide piece 37 carries a motor 39 with an eccentric shaft 40, the eccentric 41 of which is seated in an elongated hole 42 of a support arm 43. This support arm is pivotally supported on the arm 35 at its end on the left in FIG. 4 about a pivot bolt 44 and carries a water jet nozzle 45 on its end on the right in FIG. 4 sinusoidal trajectory of the water jet nozzle 45. The amplitude of this movement is increased when the guide piece 37 is moved to the left, and it is reduced when the guide piece 37 is moved to the right.

In the embodiment according to FIG. 5, a carriage 32 can likewise be moved along a guide 31 in the direction of arrow 33 via drive wheels 34.

In this embodiment, two stands 46, 47 extend from the carriage 32. The stand 47 carries a pivot pin 48 on which a support arm 49 is pivotally mounted. The stand 46 carries a stepper motor 50 with a pinion 51, which meshes with a toothed segment 52, which is formed on the left end of the support arm 49 in FIG. 5. Rotation of the pinion 51 thus leads to a corresponding pivoting of the support arm 49 and thus of the water jet nozzle 45 seated on the right end of this support arm.

The amplitude of the movement of the water jet nozzle 45 is determined by the step length of the stepping motor 50. The change in the center or 0 position of the stepping motor 50 with respect to the toothed segment 52 can be shifted towards or away from the guide 31, regardless of the respective amplitude.

The embodiment according to FIGS. 6 and 7 has a clamping device 55 which can be fixed by means of clamping screws 56 to scaffolding posts 57 of a scaffolding. The clamping device 55 carries on the building side of the scaffolding a horizontal guide rail 58. On this in turn, rollers 59 act on the a holder 60 are supported. At least one of the rollers 59 can be driven by a motor, not shown, in order to be able to move the entire device horizontally. The holder 60 carries a guide 62 which runs normal to the horizontal guide axis 58, that is to say which runs vertically, on which a carriage 61 can be moved in the direction of the arrow 63 driven by a motor, not shown.

The carriage 61 can be configured as a whole as described for the aforementioned embodiments.

The horizontal guide rail 58 is formed from a plurality of guide pieces 64, the guide piece lying at the rear in the working direction being removed there and can be reattached to the front as the work progresses. This means that a continuous rail can be formed over any desired machining length.

8 and 9 show a bearing for a water jet nozzle 67, which can be used in all of the previously described embodiments. The water jet nozzle 67 is seated in a ball bearing 68 of an externally toothed wheel 69 which meshes with the inner toothing 70 of an inner cage 71. This inner cage, in turn, can be driven at a selectable speed and is freely rotatable in an outer cage 72, which can also be driven at a freely selectable speed. The outer cage 72 eccentrically carries a bearing pin 73 on which the wheel 69 is freely rotatable. The speeds of the inner cage 71 and the outer cage 72 can be coordinated with one another in such a way that the water jet nozzle 67 either does not change its position relative to the associated support arm or is moved on a circle with a selectable radius.

All of the illustrated embodiments can also be equipped with a plurality of water jet nozzles, the inclination of which can also be adjustable. All embodiments can of course also be operated so that the movement path of the water jet nozzles is straight and not sinusoidal.

The embodiment shown in FIGS. 10, 11 shows a nozzle holder 75 which carries three nozzles 76 to 78 and is located at the end of a tubular passage 79, to the other end of which, not shown, a pressure water hose is connected. The bushing 79 is rotatably mounted in a holder 80. Nozzles 76 through 78 sit in the nozzle holder 75 with differing eccentricities e1, e2, e3 with respect to the longitudinal axis 81, so when the bushing 79 and the nozzle holder 75 rotate, they describe circles with diameters of different sizes. Each nozzle 76 to 78 can be closed separately for itself by means of a stopper 82.

In the exemplary embodiment, the rotary drive takes place via a belt 83, which is driven by a motor, not shown.

As in the previously described embodiments, the holder 80 can be moved back and forth in an adjustable range in accordance with the arrow 84.

The embodiment of the device according to FIG. 12 has guide tubes 85, 86 which run parallel to one another and which are brought into position and held by means of a frame (not shown). On the upper guide tube 85, two rollers 87, 88 engage from above and from below a drive wheel 89 coupled to a drive, not shown. The rollers 87, 88 and the drive wheel 89 are mounted in the upper end of a trolley 90, which can be moved along the guide tubes 85, 86 by the action of the drive wheel 89.

The carriage 90 has a guide 91 that runs normal to the guide tubes 85, 86, along which a carriage 92 can be moved, which carries a jet head 94 for at least one water jet nozzle via a parallel joint arm 93. A spindle 95 engages on the parallel joint arm 93, by means of which the parallelogram position of the parallel joint arm 93 and thus the position of the jet head 94 and the water jet nozzles carried by it can be changed. A lower roller 96 is seated on the trolley 90 and is supported laterally on the lower guide tube 86.

The trolley 90 is equipped with a removable stand 97 at its lower end.

Claims (25)

Device for the complete or partial targeted removal of filler material from joints between wall components, characterized in that it comprises a guide unit (6; 90), which is supported by an adjustable support device (1; 55; 85, 86) and is adjustable, with a straight guide (8; 15; 31; 62; 91) has a slide (9; 16; 32; 61; 92) slidably arranged on the guide (8; 15; 31; 62; 91), which has a jet head with at least one on the Joints directed water jet nozzle (11; 22; 45; 67; 76,77,78) carries, at the rear end of which a pressure hose (12) can be connected. Apparatus according to claim 1, characterized in that the carrying device is a carriage (90) guided on two guide tubes or rails (85, 86) which run parallel to one another and which is a straight guide (91) for the jet head (94) for the Nozzle or the carriage (92) carrying the nozzles. Apparatus according to claim 1 or 2, characterized in that the jet head (94) is connected to the carriage (92) via an adjustable parallel joint arm (93). Apparatus according to claim 2 or 3, characterized in that the carriage (90) is held on the guide tubes or rails (85, 86) via rollers (87, 88, 89, 96). Apparatus according to claim 4, characterized in that a drive wheel (89) is mounted on the carriage (90) and is in frictional contact with one of the guide tubes or rails (85). Device according to claim 1, characterized in that the carrying device (1) is a multi-section swivel arm which can be fixed on a scaffolding. Device according to claim 1, characterized in that the carrying device is a clamping device (55) which can be fixed to a scaffolding and is connected to the guide unit (6). Device according to claim 6 or 7, characterized in that the guide (8; 15; 31) can be pivoted in a plane parallel to that of the wall elements. Device according to claim 6 or 7, characterized in that the guide (62) of the guide unit runs vertically and can be displaced along a horizontal guide rail (58) which is connected to the clamping device (55). Device according to Claim 9, characterized in that the horizontal guide rail (58) is formed from guide pieces (64) which can be joined together in the longitudinal direction and can be fixed on the scaffolding. Device according to one of the preceding claims, characterized in that the carriage (9; 16; 32; 61) is provided with a motor for moving along the guide (8; 15; 31; 62). Device according to one of claims 6 to 11, characterized in that the jet head for the water jet nozzle (11; 22; 45) or the water jet nozzles is or are mounted on a support arm (10; 19; 43; 49) which is in a to the plane of the wall elements parallel plane transverse or inclined to the guide (8; 15; 31; 62) is displaceable. Apparatus according to claim 12, characterized in that the support arm (10; 19; 43; 49) can be pivoted about a pivot pin (18; 44; 48) running normal to the plane of the wall components. Apparatus according to claim 13, characterized in that the support arm (10; 19; 43) has an elongated hole (21; 42) into which an eccentric shaft (24; 40) coupled with a drive engages and is adjustably mounted in the longitudinal direction of the elongated hole . Apparatus according to claim 13, characterized in that the eccentric shaft (24; 40) is supported on a rocker (20) which is adjustable in its inclination with respect to the guide (8; 15; 31; 62) and parallel to the support arm (10 ; 19; 43; 49) runs, the support arm (10; 19; 43; 49) and rocker have the same pivot axis. Device according to claim 13, characterized in that the support arm (49) has a tooth segment (52) which runs concentrically to the pivot pin (48) and into which a pinion (51) of a reversing stepping motor (50) engages. Apparatus according to claim 16, characterized in that the center or 0 position of the pinion (51) with respect to the tooth segment (52) on the motor is adjustable. Apparatus according to claim 16 or 17, characterized in that the stepping motor is adjustable with regard to the step length. Device according to one of the preceding claims, characterized in that a suction box (29) surrounding the water jet nozzle (11; 22; 45) or the nozzles is provided, which is located on the carriage (9; 16; 32; 61), the support arm (10; 19; 43; 49) or the rocker (29) is supported. Device according to one of the preceding claims, characterized in that two nozzles are arranged one behind the other in the direction of the guide (8; 15; 31; 62). Device according to one of the preceding claims, characterized in that the water jet nozzle (11; 22; 45) or the nozzles are inclined with respect to the plane determined by the wall components. Device according to claim 21, characterized in that the water jet nozzle (11; 22; 45) or the nozzles can be adjusted with respect to their inclination with respect to the plane of the wall components. Device according to one of the preceding claims, characterized in that the water jet nozzle (11; 22; 45) can be moved on a circular path with a selectable diameter without rotation about its own axis. Device according to one of claims 1-22, characterized in that at least two nozzles (76, 77, 78) with different eccentricities with respect to the longitudinal axis = axis of rotation (81) of a rotatably mounted, driven nozzle holder (75) are provided. Device according to claim 24, characterized in that at least one of the nozzles (76, 77, 78) can be closed separately.

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