EP0607995A1 - Plastering apparatus for building surfaces - Google Patents

Abstract

The apparatus for applying plastering mortar on wall surfaces (3) of buildings is provided with a framework (7) which can be set up in an aligned manner along a wall (1) which is to be plastered. A mortar-spraying nozzle (15) which can be subjected to compressed air, and to which the plastering mortar is fed continuously by a conveying assembly, is guided on said framework (7) such that it can be displaced vertically, horizontally and perpendicularly with respect to the wall surface (3). For the releasable fastening of the mortar-spraying nozzle (15) arranged at the end of a conveying hose (16), a nozzle-retaining means (76) is arranged on an operating carriage (75), which is guided, in an operating frame (14), such that it can move on guiding elements (44, 45) horizontally over the operating width (B) thereof. The guide elements (44, 45) are aligned parallel to a horizontal guide rail (10) of the framework (7), which guide rail is guided such that it can move vertically on at least one vertical guide rail (8, 9). The operating frame (14) exhibits, beneath the operating carriage (75), a horizontal pull-up strip (48) and, on two frame legs which delimit the operating frame (14) laterally, in each case one vertical pull-down strip (60, 61) and, for its part, is guided, such that it can be adjusted perpendicularly with respect to the wall surface (3), in a guide frame (23) which can be displaced horizontally on the horizontal guide rail (10) and can be arrested in any position. <IMAGE>

Description

Device for applying plastering mortar to the wall surfaces of buildings with a frame that can be set up aligned along a wall to be plastered, on which a mortar spray nozzle that can be pressurized with compressed air and to which the plastering mortar is continuously fed by a conveyor unit, can be moved vertically, horizontally and perpendicularly to the wall surface is.

A device of the generic type is already known from European patent application 0 292 453 A2. This is a plastering mortar spraying device with a mortar spray nozzle arranged directly at the end of a conveyor pipe equipped with a screw conveyor, which is additionally provided with a compressed air nozzle. The conveying device is connected directly to a mortar container and can be moved horizontally, vertically and transversely with it as an operating unit on a frame. With the mortar spray nozzle provided there it is possible to spray fresh mortar directly onto a wall surface to be plastered and moving them along the wall in different directions.

From the frame to which this mortar spraying unit is attached, only a vertical guide rail is shown, which is suspended from a trolley slidably mounted in a horizontal rail arranged above.

Because in this known device the mortar container, from which the plaster mortar is supplied directly to the spray nozzle by means of a motor-driven screw, is arranged in a frame movably attached to the frame, the possibly full mortar container must also be moved with each movement of this frame or the spray nozzle be, which requires considerable effort and a correspondingly stable shape of the frame. The suspension of the frame, mounted on a horizontal trolley to be arranged near the ceiling, also requires a considerable amount of material and labor to set up the entire device in a manner appropriate to the work.

Another known device for spraying a layer capable of setting onto walls (European patent specification 0 215 243 B1) is provided with a formwork-like support surface for the layer to be sprayed on is arranged to be movable according to the movements of the outlet end of a pressure line, and which is formed by the strand facing the wall and running over the sprayed-on layer of an endless flexible formwork skin which runs around at least two spaced-apart deflection elements. On the side facing away from the sprayed-on layer, the strand forming the supporting surface of the flexible formlining is assigned a supporting element which is simultaneously designed as a vibration element. The support surface has a support structure, to which a motion drive is assigned, which is arranged on a guide frame located to the side or below the formwork-like support surface and in which the propulsion movement can be transmitted to the deflection elements via the support structure. A connection support carrying the axes of the deflection elements and a support arm connected to this are provided as the support structure.
Apart from the fact that this device is absolutely dependent on an electric drive which keeps the flexible support surface in motion and which also causes the movement of the entire device along the wall surface to be plastered, this known device is very much both in use and in handling laborious.

The same also applies to a further device known from DE 38 15 02 A1 for applying a flush layer of plaster to a wall surface, which has an elongated housing which has an inlet opening for mortar, an axial outlet opening for the mortar and in Area of the outlet opening is provided with a pull bar. In a receiving trough for the mortar, a centrifugal roller is arranged, which is provided over its entire length with leaf springs, by means of which the mortar is thrown out of the receiving trough onto the wall to be plastered during the rotation of the centrifugal roller. Here, too, an electric motor drive for the centrifugal roller is required. Already because of the weight that the receptacle, which is constantly filled with a mortar supply, has together with the centrifugal roller, this device is not easy to handle. The entire movable device with the centrifugal roller, the receiving trough and the elongated housing is continuously pushed vertically on a vertical drive on two vertical guide rails via a chain hoist by means of a roller drive. The vertical guide columns consist of telescopically extendable profile tubes, the upper and lower ends of which are connected to the vertical spars of a support frame, the vertical support legs of which are also made of extensible Profile pipes exist and can be clamped between the floor and ceiling of a room whose walls are to be plastered.

Already because of the relatively large weight that the mortar supply brings with it, which must be replenished continuously in the receptacle or in the housing in relatively large quantities, this device is difficult to handle and set up overall, and it is also inconvenient to transport.

The invention has for its object to provide a device of the type mentioned that is easy to use and universally applicable and with the large and small layers of plaster can be applied with a smooth, flat surface.

This object is achieved according to the invention in that for the releasable fastening of the mortar spray nozzle arranged at the end of a delivery hose, a nozzle holder is arranged on a work slide which is guided in a work frame horizontally over its working width on guide elements, the guide elements being parallel to a horizontal guide rail of the frame are aligned, which are vertically movable on at least one vertical guide rail The work frame has a horizontal pull-up bar underneath the work slide and a vertical pull-off bar on each of the two frame legs that laterally delimit the work frame and is in turn adjustable in a guide frame perpendicular to the wall surface, which is horizontally displaceable on the horizontal guide rail and can be locked in any position.

The device according to the invention consists of a few, easy-to-handle individual parts which can be easily assembled into a work unit and, as a result, are also easy to handle. The way the sledge works is so simple that it can easily be carried out by auxiliary personnel, so that it is also able to professionally install a plaster layer on an existing wall and this at the same time over the entire height and over the entire length Smooth the length of the wall in question evenly.

As an additional relief, a weight compensation can be provided on the vertical guide rail (s) for the frame parts which are vertically movable along this guide rail (s) with the work slide, in any known form, so that the work slide can also be easily moved up and down with the horizontal guide rail.

In some cases, the configuration according to claim 2 is advantageous. This is particularly true when a wall section, for example near the ceiling, is to be provided with a smooth plaster layer by a horizontal movement of the work carriage or the vertical pulling strips attached to it.

The design according to claim 3 results in a relatively simple to manufacture and just as easy to use embodiment of the work frame and its adjustability in the transverse direction to the plastering wall surface, so that recesses in the wall, for example recessed surfaces of window recesses can be processed in the same way with this work frame .

The embodiment according to claim 4 is of significant advantage in that it offers the possibility of producing an exactly flat plaster surface with the pull-up strips with the same setting of the working frame both in the horizontal and in the vertical direction.

Due to the design according to claim 5, it is possible to disassemble the work frame by loosening the two guide rods from the wall plates into individual assemblies, each of which takes up little space, which is particularly advantageous for transport and storage.
The embodiment according to claim 6 ensures that the work carriage can be moved on the guide elements.

With the help of the configurations according to claims 7 to 9, it is easily possible to bring the mortar spray nozzle in the nozzle holder or with the nozzle holder into the most favorable working position and to lock it therein, the ball-and-socket joint provided according to claim 9 providing the greatest possible variation with regard to the setting of the Nozzle holder results.

The shape of the pull-on strips provided according to claim 10 not only ensures an advantageous method of working, by means of which the production of smooth and level cleaning surfaces is easy and safe, but they also take up little space in this form and can be equipped with very low weight and e.g. . B. from aluminum sheet.

While it is also possible in a simple manner by the configurations according to claims 11 and 12 to smooth window and door reveals, the configuration according to claim 13 also offers the possibility of smoothing out previously cleaned and smoothed with the pull-up plastering surfaces and thereby generating unevenness in to avoid the plaster surface.

The embodiment according to claim 14 is particularly advantageous if only one vertical guide rail is to be used instead of two vertical guide rails and / or the horizontal guide rail extends to both sides of a vertical guide rail, so that the working frame on the horizontal guide rail in one or must be moved past the vertical guide rail in another direction in order to be able to utilize the full working length of the horizontal guide rail. In this case, the delivery hose can be laid between the wall to be plastered and the fixed, vertical guide rail (s).

With the help of the hydraulic or pneumatic pressure units provided according to claim 15, the vertical guide rails can be very easily and safely between set up the floor and ceiling of a building and build it into a stable frame.
It is also easily possible to use mechanical tensioning devices for tensioning the vertical guide rails.

Fig. 1

in vereinfachter perspektivischer Darstellung eine entlang einer zu verputzenden Gebäudewand parallel dazu aufgestellte Vorrichtung der erfindungsgemäßen Art;

Fig. 2

einen Arbeitsrahmen mit seinen Führungen an einer vertikalen und an einer horizontalen Führungsschiene in Draufsicht;

Fig. 3

den Arbeitsrahmen in Frontansicht III aus Fig. 2;

Fig. 4

eine Seitenansicht IV aus Fig. 2;

Fig. 5

den kompletten Arbeits- und Führungsrahmen in perspektivischer Ansicht;

Fig. 6

den aus dem Führungsrahmen der Fig. 5 herausgenommenen Arbeitsrahmen in perspektivischer Ansicht;

Fig. 7

einen Arbeitsschlitten mit einem anderen Düsenhalter in perspektivischer Ansicht;

Fig. 8

eine horizontale Aufziehleiste mit einer daran befestigbaren zusätzlichen horizontalen Aufziehleiste;

Fig. 9

zwei zusätzliche horizontale Aufziehleisten, die an den Schmalseiten des Arbeitsrahmens individuell befestigbar sind;

Fig. 10

eine Stirnansicht X der linken Aufziehleiste aus Fig. 9;

Fig. 11

eine Stirnansicht XI der rechten zusätzlichen Aufziehleiste aus Fig. 9.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1

a simplified perspective view of a device of the type according to the invention set up along a building wall to be plastered;

Fig. 2

a work frame with its guides on a vertical and on a horizontal guide rail in plan view;

Fig. 3

the work frame in front view III of Fig. 2;

Fig. 4

a side view IV of Fig. 2;

Fig. 5

the complete work and management framework in perspective view;

Fig. 6

the working frame removed from the guide frame of FIG. 5 in a perspective view;

Fig. 7

a working carriage with another nozzle holder in a perspective view;

Fig. 8

a horizontal pull-up bar with an additional horizontal pull-up bar that can be attached to it;

Fig. 9

two additional horizontal pull-on strips that can be individually attached to the narrow sides of the work frame;

Fig. 10

an end view X of the left pull-up strip from Fig. 9;

Fig. 11

9 shows a front view XI of the right additional pull-on strip from FIG. 9.

The device for plastering shown in Fig. 1 in a complete perspective overview, i.e. to apply plaster on, the wall surface 3 of a wall 1 consists of a frame 7 and a work frame 14 on which a mortar spray nozzle 15 is attached, which is connected via a delivery hose 16 to a mortar conveyor, not shown.

As in the embodiment shown in FIG. 1, the frame 7 consists of two vertical guide rails 8 and 9 and a horizontal guide rail 10. The two vertical guide rails 8 and 9 are each provided at their foot ends with pneumatic or hydraulic pressure units 12, which are provided with foot plates 11 on a floor of a building room, not shown sit on. In addition, the upper ends of these vertical guide rails 8 and 9 are provided with support plates 13 which can be pressed by means of the pressure units 12 against the ceiling surface, not shown, of the building space indicated here, in order to give the two vertical guide rails 8 and 9 a secure hold.
When setting up these vertical guide rails 8 and 9, it must of course be ensured that they are exactly perpendicular and that the horizontal guide rail 10 runs parallel to the wall surface 3 to be plastered. Both the vertical guide rails 8 and 9 and the horizontal guide rail 10 each consist of a tubular profile provided with projecting marginal edges, preferably made of light metal, so that on the one hand they can be light in weight but on the other hand they can have high dimensional stability. Carriages 18 are mounted on the vertical guide rails 8 and 9 by means of rollers 17 which are positively guided in the profiles of the guide rails and can be moved up and down together along these guide rails 8 and 9. It is expedient, contrary to the representation shown in FIG. 1, to close the carriages 18 all around and both above and below these carriages 18 the vertical guide rails 8 and 9 by means of elastic bellows made of rubber or the like. To be covered so that they cannot be sprayed with mortar at work and the mobility of the carriage 18 is not impaired.

On the sides 19 of the carriage 18 facing the building wall 1 or its wall surface 3, the horizontal guide rail 10 is fastened, which in turn is provided with a carriage 20 which can be displaced on it in the horizontal direction. In addition, the two carriages 18 are each provided with clamping screws 21, by means of which they can be fixed to the guide rails 8 and 9 at any height, which can be advantageous in certain work.

On the front wall 22 facing the wall surface 3 of the carriage 20 arranged on the horizontal guide rail 10 and also equipped with rollers 17, a guide frame 23 is fastened in which the actual work frame 14 is mounted. As can be seen from Fig. 5, the guide frame 23 consists of four guide tubes 24, 25, 26 and 27, each lying in pairs one above the other at right angles to the longitudinal direction of the horizontal guide rail 10 or perpendicular to that defined by the two vertical guide rails 8 and 9 Vertical plane. These guide rails 25 to 27 are each on the carriage 20 facing side by longitudinal connectors 28 and 29 and by vertical connectors 30 and 31 to a rigid frame body, which forms the guide frame 23, connected.
As can be clearly seen from FIGS. 3 and 5, the guide tubes 24 to 27 each have the same rectangular profile. While their ends facing the carriage 20 are closed by the vertical connectors 30 and 31, their opposite ends are open. The mutually facing upper and lower wall sections of the guide tubes 24 and 25 or 26 and 27 lying one above the other in pairs are each provided with slots 32 which extend approximately to the longitudinal center and which are open at the wall-side ends. In addition, the outwardly directed, vertical longitudinal walls 33 of the guide tubes 24, 25, 26 and 27 are provided with longitudinal slots 35 and 36, respectively, which extend at least approximately over their entire length, but which are each closed at both ends.

In these guide tubes 24 to 27 telescopically tubular frame legs 37, 38, 39 and 40 are slidably guided, the outer profile of which fits almost without play into the inner profile of the guide tubes 24 to 27. These frame legs 37 to 40 are in each case at the ends guided in the guide tubes 24 to 27 with clamping screws 41 provided, the threaded shafts of which protrude through the slots 35 and 36 of the guide tubes 24 to 27 and with which these frame legs 37 to 40 can optionally and continuously be fixed in the guide tubes 24 to 27. These frame legs 37 to 40 are rigidly connected to one another as part of the working frame 14 in pairs lying one above the other by vertical wall plates 42 and 43. In these wall plates 42 and 43, two spaced parallel to one another and parallel to the horizontal guide rail 10, thus also horizontally extending guide rods 44 and 45, are mounted, by means of which the frame legs 37 to 40 connected to one another by the wall plates 42 and 43 are joined to form the working frame 14, which in the guide tubes 24 to 27 of the guide frame 23 is displaceable in depth, ie horizontally and transversely to the guide rail 10 or perpendicular to the vertical plane in which the two vertical guide rails 8 and 9 are located.
These guide rods 44, 45 are releasably secured to the vertical wall plates 42, 43, for example by resilient locking washers 46, so that the work frame 14 can be disassembled by loosening these guide rods 44 and 45 from the two wall plates 42 and 43 into individual assemblies, each for itself take up little space and are easy to transport.

The ends 46 and 47 of the frame legs 38, 40 protruding from the guide tubes 24 to 27 carry a horizontal pull-on strip 48 which extends over the entire width of the work frame 14. As can best be seen from FIG. 8, this pull-on strip 48 consists of a sheet metal strip , which has a smoothing surface 49 with a straight smoothing edge 50 which is inclined approximately at 10 ° to 30 ° to the working plane, ie to the cleaning surface, which forms the lower end. On its rear side, this pull-on strip 48 is provided with an angular profile 51, which extends over its entire length and has a horizontal leg 52 with two rectangular openings 53 and 54. This angle profile 51 serves on the one hand to stiffen the pull-on strip 48 against deflection and on the other hand to hang in an additional vertical pull-on strip 55 which is fastened to two upwardly directed support straps 56. These support brackets 56 are each provided with a hook profile 57 at the upper end, which can be hung over the upper edge 58 of the mounting strip 48, and with two angled locking tongues 59, which can be hung in the openings 53 and 54 of the angle profile. If necessary, the work frame 14 can thus be provided with two horizontal pull-up strips 48 and 55, which are simultaneously effective in the upward movement of the work frame 14.

In addition, vertical mounting bars 60 and 61 are also arranged on the pair of frame legs 37 to 40, which have approximately the same cross-sectional shape as the horizontal mounting bar 48 and whose straight vertical smoothing edges 62 lie in the same vertical plane as the smoothing edge 50 of the horizontal mounting bar 48.
It is thus possible by a horizontal movement of the work frame 14, which takes place together with the guide frame 23 on the horizontal guide rail 10, in the direction of arrow 63 to smooth a cleaning surface with the vertical pull-up strip 61, which is smoothed above that with the horizontal pull-up strip 48 Plaster surface, for example the upper section 65 of the plaster strip S1 on the wall surface 3 (FIG. 1), which begins in the corner 66 of the wall 1. It can be seen that the horizontal mounting bar 48 cannot be smoothed to the ceiling of the room because this horizontal mounting bar 48 is arranged on the lower frame legs 38 and 40 of the working frame 14 and therefore cannot be guided over the entire height of the wall 1 .
With the second vertical pull-up strip 61 fastened to the frame legs 39 and 40, the working frame 14 can be moved in the direction of the arrow 64 the opposite corner of the room near the ceiling.

9 to 11 show additional so-called left and right pull-on strips 67 and 68, each of which is fastened to the outside of flat bar supports 70 and with the aid of the clamping screws 41 and an additional clamping screw 41 'on the lower frame legs 38 and 40, respectively are attached to the outside on the slotted walls of the guide tubes 25 and 27 or on the upper frame legs 37 and 39 so that they rest on the outer sides of the guide tubes 24 and 26. In order to be able to fasten these flat bar supports 70 in an easily detachable manner, they are each provided at the front ends with an open horizontal slot 71 and also each with an underside open vertical slot 72, through which the clamping screws 41 and 41 'are inserted and tightened for clamping can.
It is useful if these additional left and right pull-on strips 67 and 68, the profiles of which can be seen in FIGS. 10 and 11, can be fixed in the longitudinal direction of the flat bar supports 70 on the work frame 14 or on the frame legs 37 to 40 thereof in an adjustable manner. With the help of these additional left and right pulling strips 67 and 68 it is possible, for example Smooth window or door reveals, while a parallel to normal wall surface 3 recessed surface z. B. a window recess with the help of the horizontal pull-off bar 38 and the vertical pull-up bars 60 and 61.

As already mentioned at the beginning, a mortar spray nozzle 15 is arranged in the work frame 14 for applying the plastering mortar, to which the plastering mortar to be applied is fed through the delivery hose 16. In addition, this mortar spray nozzle 15 is in the usual way additionally provided with a compressed air nozzle which gives the plastering mortar to be applied the necessary flying speed. To hold this mortar spray nozzle 15, a working carriage 75 is mounted so that it can move axially on the two guide rods 44 and 45 so that it can move freely back and forth between the two wall plates 42 and 43 of the working frame 14. In the simplest embodiment shown in FIGS. 3 to 5, this working slide 75 is provided with a nozzle holder 76, which consists of a two-part, clamp-like clamping head 77 with a cylindrical recess 78, into which the mortar spray nozzle 15 can be firmly clamped (see FIG . 1). The bridge-shaped upper part 79 is fastened by means of clamping screws 80 and 81 on a vertical web 82 of the working carriage 75.

In order to protect the two guide rods 44 and 45 from infestation with mortar, they are encased on both sides of the working slide 75 by elastic bellows 83 and 84, which only imperceptibly restrict the mobility of the working slide 75.

So that it is possible to convey the delivery hose 16, through which the mortar spray nozzle 15 is supplied, on the side of the horizontal guide rail 10 facing the wall 1, i.e. leading downwards in front of this guide rail 10, the mortar spray nozzle 15 is connected to the delivery hose 16 via a pipe bracket 85. In this way it is possible, with a corresponding horizontal distance of the guide rail 10 from the carriage or carriages 18, to guide the guide frame 23 past the vertical guide rail 9, for example, if the horizontal guide rail 10 projects to the right by a certain amount, as shown, without the delivery hose 16 getting stuck on the vertical guide rail 9, or having to be pulled around it.

In order to also have the possibility of directing the mortar spray nozzle 15 onto the wall surface 3 to be plastered at different angles of attack, another working slide 75 'according to FIG. 7 is provided, which instead of the Working carriage 75 can be arranged on the two guide rods 44 and 45. This work slide 75 'has a clamping head 77', which is also formed like a pipe clamp, but which is mounted by means of a vertical support shaft 88 and by means of a ball clamping joint 89 in a spherical bearing 90, which can be locked by means of clamping screws 91. With the help of this ball-and-socket joint 89, the clamping head 77 'with the mortar spray nozzle 15 fastened therein can both be rotated about the axis of the support shaft 88 and pivoted about 35 ° in any direction about the center of its bearing ball 92.

As can best be seen from FIG. 1, the plastering mortar is applied to the wall surface 3 in strips S1, S2 etc., each of which has a width B which corresponds to the movement distance B of the work slide 75 or 75 'in the work frame 14. The first plaster strip S1 is usually applied from bottom to top in a corner 66 and at the same time smoothed with the horizontal pull-up strip 48. It is expedient to lock the carriage 20 on the horizontal guide rail 10 with the aid of the clamping screw 18, so that the work carriage 14 can only be moved in the vertical direction. The work carriage 75 or 75 'is moved back and forth in the work frame 14, and the Mortar spray nozzle 15 applies the plastering mortar to the wall in strips, the horizontal guide rail 10 being moved upwards by the applied strip height after each reciprocating movement of the working slide 75, 75 '. When the working frame 14 has reached the ceiling of the room in question, which is lying on the wall 1, the plastering mortar applied by the mortar spray nozzle 15 in the field 65 is smoothed by a horizontal movement of the working frame 14 in the direction of arrow 63 with the help of the left vertical pull-up strip 61, so that the plaster strip S1 shown in Fig. 1 is completely completed. Then the horizontal guide rail 10 is moved all the way down again and the work frame 14 is set such that the second cleaning strip S2 can then be pulled onto the first cleaning strip S1 without gaps.

If the entire wall surface 3 is plastered in this way and then the surface of the reveal 4 is to be plastered, the additional left pull-up strip 67 shown in FIG. 9 is fastened to the left side of the working frame 14 or the guide frame 23, with which the Surface of the reveal 4 can be smoothed after the plastering mortar has been applied manually.
It is easily conceivable that the mounting strip fastened to the guide frame with the aid of the clamping screws 41 and 41 ' 67 protrudes into the reveal 4 when it is fastened to the guide frame 23 or working frame 14 in the manner described.

As can be clearly seen from FIG. 2 and as described above, the working frame 14 can be pushed out continuously from the guide frame 23 by the pull-out depth T , so that the pull-on strips 48, 60 and 61 and the working slides 75 and 75 'attached to it attached mortar spray nozzle 15 also on lower wall surfaces such. B. a window niche can be set without it being necessary to also reposition the vertical guide rails 8 and 9.
In an analogous manner, the right additional pull-on strip 68 can also be attached to the right side of the guide or working frame 23, 14 for smoothing a right-hand reveal surface.

Claims (15)

Device for applying plastering mortar to wall surfaces (3) of buildings with a frame (7) which can be set up aligned along a wall (1) to be plastered, on which a mortar spray nozzle (15) which can be pressurized with compressed air, which the plastering mortar continuously through a conveying unit is fed, is guided vertically, horizontally and perpendicular to the wall surface (3),
characterized
that for the releasable attachment of the mortar spray nozzle (15) arranged at the end of a delivery hose (16), a nozzle holder (76) is arranged on a work slide (75, 75 ') which is arranged in a work frame (14) horizontally over its working width (B) on guide elements (44, 45) is movably guided, the guide elements (44, 45) being aligned parallel to a horizontal guide rail (10) of the frame (7), which is vertically movably guided on at least one vertical guide rail (8, 9), the Work frame (14) below the work slide (75, 75 ') a horizontal pull-up bar (48) and on two the work frame (14) laterally delimiting frame legs (37, 38 or 39, 40) each have a vertical pull-off strip (60, 61) and, in turn, adjustable in a guide frame (23) which is adjustable perpendicular to the wall surface (3) and which is guided on the horizontal guide rail (10 ) can be moved horizontally and locked in any position. Device according to claim 1, characterized in that the horizontal guide rail (10) can be locked at least in stages on the vertical guide rail (s) (8, 9). Apparatus according to claim 1 or 2, characterized in that the working frame (23) has two frame legs (37, 38; 39, 40) at each end of two guide rods (44, 45) running parallel to the horizontal pull-up bar (48), each of which lying in pairs one above the other and running transversely to the horizontal pull-up strip (48) by means of a vertical wall plate (42, 43) and in each case in horizontal pipe legs (24, 25, 26, 27) of the guide frame (23) each in its own longitudinal direction, ie are adjustable transversely to the mounting strips (48, 60, 61). Device according to one of claims 1 to 3, characterized in that the pull-on strips (48, 60, 61) lie in a common working plane which runs parallel to the horizontal and vertical guide rails (8, 9, 10). Device according to claim 3, characterized in that the guide rods (44, 45) are detachably mounted in the wall plates (42, 43). Device according to claim 5, characterized in that the guide rods (44, 45) on both sides of the working slide (75, 75 ') are protected by elastic bellows (83, 84) enclosing them. Apparatus according to claim 1, characterized in that the nozzle holder (76, 76 ') consists of a clamp-like clamping head (77, 77') which is adjustable on the working carriage (75 ') at least about a horizontal axis. Device according to claim 7, characterized in that the clamping head (77 ') can be pivoted about a vertical axis. Apparatus according to claim 7 or 8, characterized in that the clamping head (77 ') is fastened to the working slide (75') by means of a ball clamping joint (89). Device according to one of claims 1 to 5, characterized in that the pull-on strips (48, 60, 61) each consist of sheet metal strips which have a smoothing surface (49) with a straight smoothing edge (50,) inclined at approximately 10 ° to 30 ° to the working plane. 62). Device according to one of claims 1 to 10, characterized in that additional pull-on strips (67, 68) for pulling off reveal (4) or projecting wall surfaces are attached or attachable to the working frame (14). Device according to claim 11, characterized in that the additional pull-on strips (67, 68) attached to the working frame (14) are adjustably attached to it. Device according to one of claims 1 to 12, characterized in that the pull-on strips (48, 60, 61, 67, 68) can be replaced by pulling strips provided with felt coverings. Apparatus according to claim 1, characterized in that the mortar spray nozzle (15) is connected to the delivery hose (16) by means of a pipe bracket (85) and can be fastened in the nozzle holder (76, 76 ') in such a way that the delivery hose (16) directly from below in the work frame (14) can be introduced. Apparatus according to claim 1, characterized in that the vertical guide rails (8, 9) at their lower and / or upper ends each have hydraulically or pneumatically actuated pressure units (12) through which they move between two horizontal surfaces, in particular between the floor and the ceiling of a building room can be clamped.

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