DE19539586A1 - Surface cleaning for building mortar and concrete residue removal - Google Patents

Abstract

Surfaces (10o) are cleaned when enclosed by a bell-shaped rim-sealing hood (22) containing a disc (30) which rotates at a distance from the surface and whose device (32) facing the surface removes this physically or chemically. Exhauster line (34) lying above the disc leads away from the hood and the mutually spaced sliding feet (50) are arranged so these lie parallel to the surface within the sector enclosed by the seal (24). The feet should be offset by 120 deg. from each other and are fixed to the inner wall of the hood or on the disc itself. The seal consists of an elastic lip (22r) at the rim of the hood or again consists of a brush ring at the hood rim. Surface removal is removed by air or fluid operated nozzle, and the hollow disc is loaded on one side by a pressurised air or fluid line and works with directable or exchangeable nozzles.

Description

The invention relates to a device for cleaning Surfaces, the term "cleaning" both the physi calic as well as chemical treatment of surfaces sums up.

For example, when renovating buildings it is necessary agile, loose mortar (mortar remains) from masonry joints solve or remove, by way of further Rehabilitation measures the joints with fresh Grouting new mortars.  

A similar task of the "cleaning of upper surfaces "arises in connection with surface ver soiling, for example from paint or unwanted mortar or concrete residues (splashes) exist and should be removed or paint residues from previous work. Sometimes it is desirable Salts, which are due to their capillary activity have superficially attached to remove.

Also put "paint smears", especially on facades is a significant problem, which involves significant costs Elimination caused, as some still do not really functional devices are available with surfaces that are so dirty easily, quickly and have it removed inexpensively. The thought is also there increased environmental awareness. It So it's not enough, the paint or mortar remains remove and "leave".

Finally, the term "cleaning surfaces" includes also the large area of "surface treatment", so far prepare surfaces for further treatment steps acts (for example, be ground).

Milling cutters are known for removing joint residues must be run along each individual joint and with whose help loose mortar residues can hardly be removed, so that the joints then with an air gun need to be blown out. It is obvious that this The procedure may only be used for small areas.

It is for removing paint residues or "smears" known to be the surfaces by means of sandblasting technology act. This creates a sand / air mixture under high pressure jetted against the surface and the surface so mechanically  rubbed off. Apart from the fact that the surface abrasion This method can often be higher than desired economical again only with very large surfaces perform and solve the problem of subsequent ent care of the so abraded, contaminated surfaces don't stratify.

In principle, chemical treatment processes are based on that the paint layers to be removed are first pretreated and then be "washed off". Both steps he follow manually.

So-called "angle grinders" or are on the market "Rotary grinder" known, the rotating grinding wheels have with which surfaces are ground can. However, their performance is extremely limited. The sanded material must then be collected separately, disposed of or processed.

DE 38 27 251 A1 discloses a nozzle head, the one bell-like, on the surface to be treated via a Has circumferential seal attachable hood, within which the actual nozzle head is arranged. Through an im Nozzle head formed line overflows liquid individual feed channels to various discharge nozzles. So that the nozzle openings do not directly face the cleaning surface can be put on (and thus lose their function), is a spacer ring made of metal provided that around the nozzle between the lower Boundary surface of the nozzle holder and those to be cleaned Surface runs. Finally there is one on the hood Suction line connected.  

With this device, however, there is a risk that due to a negative pressure in the area of the hood stuck.

The invention is accordingly based on the object Device for cleaning (treating) surfaces offer which for different types of surfaces cleaning can be equipped, easy handling, esp especially in manual mode, enables and safe Suction enabled.

In its most general embodiment, the invention proposes a device for cleaning surfaces with the following Features before:

• - A bell-like surface to be cleaned with a hood that can be fitted all around,
• - One, inside the hood and at a distance from the hood led disc, which on their, the to be cleaned Surface facing side with a device for physical and / or chemical removal of the surface is trained as well
• - A suction line, which is above the disc from the Hood runs away, being
• - At least three, spaced apart Sliding feet are provided, which are arranged so that their sliding surfaces parallel to the surface to be cleaned surface in the section of the Device.

Thereafter, the device according to the invention is characterized by the following main Characteristics marked. The bell-like hood serves to place the device against the surface to be treated and to create a "treatment room" below the hood.

The sliding feet ensure that the device is always so Surface to be cleaned is aligned with that

• a) the cleaning device can work "freely" and
• b) the hood is not sucked tight, since the seal is also can never get stuck.

The actual treatment body becomes indirect or formed directly from the aforementioned disc. So it can Washer - as described in more detail below - for the accessory play with a grinding wheel, with whose help sanded the surface to be treated or being roughened. The disc can also be used for Intake nozzles are used over the air and / or one Liquid under any pressure against the one to be treated Surface can be performed.

In any case, rubbed or blown out Material "collected" below the hood.

For this purpose, the hood is wrapped around (Elastic) seal designed over which the device against the surface is pressed. Rubbed or blown out Material can therefore not escape from the side.

The sliding feet ensure that the hood is always a necessary minimum distance to the one to be cleaned Has surface, but nevertheless for example water between the sliding feet easily led away and abge can be sucked.  

Here comes the feature that the disc is at a distance Hood is also important, in connection with the further feature, according to which a suction line away from the hood above the pane leads.

In this way it is ensured that all parts chen, with the help of the device of the to be treated Surface "removed", laterally between the disc and hood can be suctioned upwards because of the suction line arranged above the disc there "Vacuum" is set, which is inside the hood (um the disc around) causes an annular suction flow gently (without the hood "sticking" overall).

With regard to the device for physical and / or chemical removal of the surface, the invention provides various alternative embodiments, namely:
According to a first embodiment, the device consists of at least one nozzle which can be acted upon by air and / or a liquid. Air, water and / or air / water mixtures are thus sprayed under adjustable pressure against the surface to be cleaned, which is thus treated, via the nozzle.

For example, to loosen mortar residues in joints proven to be sufficient to use compressed air The most advantageous way to do this is to use the disc as "Hollow washer" is formed and assigns to that to treating surface facing side a variety of Air outlet nozzles on, so that the led out of the nozzles  Compressed air effective over almost the entire pane surface is. The compressed air ensures that mortar remains or loose Joint parts loosened and flung out of the joints will. The parallel suction system ensures that the corresponding particles then immediately led past the side of the pane into the suction and to be disposed of.

Especially when particularly high pressures are necessary the number of air outlet nozzles will be corresponding restrict and ent the nozzles and their feed lines dimension speaking. On the constructive structure of the However, this does not change anything on the device. In any case, the Area within the hood through the named disc divided, below the disc (towards the surface) the cleaning takes place and the suction above the pane takes place.

The device can preferably be "rotating" via the be treated surface. A handle on the The outside of the hood is particularly helpful. Of the The user can then use the handle and / or the suction hold and lead.

In this sense, an embodiment of the invention before, the disc itself rotating on an appropriate To wave. In this way, "centrifugal forces" generates a radial ejection of loose particles in the Promote the annular space between the disc and hood and thus the Optimize the effectiveness of the device.  

It can be provided as a further measure that Washer also "axially", ie in the direction against and from the training surface to be adjustable in height. in the In the simplest case, this is done by appropriate Detents on an associated shaft. The "height adjustment Availability "can also be done" in-situ ", for example through an appropriate thread guide so that the Disc during a rotational movement of the shaft due to the corresponding torque itself "in the axial direction" adjusted and so for example against the one to be treated Surface is guided or at rest releases from this again.

In addition, the invention offers a number of other modifications lungs / embodiments with which the device addresses the can be adapted to local conditions.

This includes removing the seal from the free edge in the area of the hood. The brush ring has the advantage that it is not "hermetic" seals and so far a "total vacuum" below the Hood is avoided. In addition, a "brushing rand "already a certain" pre-cleaning "when the device for example in circular movements over a surface to be led.

Similar brushes can also be used on the one to be cleaned Surface facing side of the disc are arranged for example as "brush rings" or "discrete brushes elements ", which also enables a kind of" pre-cleaning " lichen.  

The disc can also have openings, that is Connection openings between the rooms on both sides of the Disc. Such openings can be suctioned off larger solid particles or liquid droplets facilitate or support. In this case the suction does not take place exclusively through the formed between the washer and hood annulus, but - to a certain extent - also through the pane itself directly into the suction room.

Further features of the invention emerge from the note paint the subclaims and other registration documents. This also includes the following figures description, the generally applicable characteristics of the invention. Show - each in strong schematic representation -.

Fig. 1 shows a section through a first embodiment of a device according to the invention,

Fig. 2 shows a section through a second embodiment of a device according to the invention,

Fig. 3 shows a section through a third embodiment of a device according to the invention.

Here are the same or equivalent construction in the figures parts shown with the same reference numerals.

The reference numeral 10 symbolizes masonry with a surface 10 o, along the joints 10 f, the grout 10 m partly weathered, partly eroded or loosened by milling cutters in the joints 10 f and must be removed.

The device 20 provided for this purpose consists of a bell-like hood 22 with an annular edge region 22 r, to which a circumferential brush 24 connects.

A shaft 26 runs centrally through the bottom 22 b of the hood 22 , guide means for the shaft 26 being indicated only schematically at 28 . The shaft 26 is rotatably supported within the guide means 28 and an (external) drive is only indicated by the arrow M.

At the free end of the shaft 26 designed as a hollow shaft, a ring disk 30 designed as a hollow disk follows, which is fluidically connected to the hollow shaft 26 in connection and has on its underside a large number of air outlet nozzles 32 , so that the shaft 26 is supplied under pressure Air can initially distribute in the hollow disc 30 and then flows out through the nozzles 32 .

It can be seen that the disk 30 runs in the edge-side section of the hood 22 , offset somewhat from the edge 22 r.

From the rear part 22 o of the hood 22 , that is to say in the area which is "above" the pane 30 in FIG. 1, a suction line 34 runs from an inclined surface 22 s of the hood 22 to a receptacle (not shown here).

Three sliding feet 50 protrude from the inner wall 22 i of the hood 22 , the free ends of which are formed with sliding surfaces 52 . The sliding surfaces 52 run parallel to the surface to be cleaned as soon as they are placed on the surface 10 o, since the sliding surfaces 52 are fastened in an articulated manner to the sliding feet 50 . The sliding feet 50 with sliding surfaces 52 are each offset by 120 ° to one another, in such a way that the sliding surfaces 52 protrude into the section of the hood 22 which is formed between the edge 22 o and the free end of the brush 24 (in the unloaded state) .

The function of the device is as follows. The hood 22 is placed against the surface 10 o to be cleaned, the annular brush edge 24 or the sliding surfaces 52 acting as a contact and sealing surface.

Even if the sliding surfaces 52 rest on the surface 10 o, the edge of the brush 24 is not completely compressed, so that air can be sucked in further by the brush 24 .

Then compressed air is guided through the nozzles 32 against the surface 10 o and thus into the joints 10 f. The compressed air acts that loose mortar residues 10 m or mortar parts are thrown out of the joints 10 f, first in the area between the surface 10 o and the washer 30 be or in the annular space between the washer 30 and edge 22 r of the hood 22nd

The vacuum formed in the region 22 o of the hood 22 with the aid of the suction line 34 then ensures that the mortar particles flying loosely underneath the hood 22 are passed directly via the suction line 34 into a collecting vessel.

The device can thereby be optimized if the shaft 36 is designed to be rotatable (rotating). In this case, additional centrifugal forces ensure that detached mortar parts are guided directly into the annular space between the disk 30 and the hood edge 22 r and are pulled away from there via the suction line 34 .

Instead of using air, the device described can also be used Liquids or air / liquid mixtures operated will. The liquid can, for example, consist of water, Solvents, cleaning agents or mixtures thereof consist.

The pressure at which the air, the liquid or the air / liquid mixtures are sprayed onto the surface 10 o via the nozzles 32 depends on the respective application area and is, for example, 10 to 20 bar, but can also go far beyond this . Higher pressures can be realized especially with the variant shown in FIG. 2.

Instead of a hollow disc 30 with a plurality of nozzles 32 , the hollow shaft 26 here merges directly into a nozzle head 32 d, with which the air, the liquid or mixtures thereof can be sprayed against the surface 10 o under high pressure.

But also in this embodiment, a disk 30 adjoins the nozzle head 32 d on the circumference, which creates a subdivision of the space covered by the hood 22 into a cleaning space 22 u and the aforementioned suction space 22 o.

Otherwise, the construction of the exemplary embodiment according to FIG. 2 is comparable to that according to FIG. 1.

The apparatus of Fig. 2 is particularly suitable for the cleaning of paint, paint strippers surfaces or color graffiti on top. The nozzle 32 d can be designed both as a wide-flow nozzle and a high-pressure nozzle, depending on the medium.

The path of the detached paint residues is shown by the arrows P indicated schematically.

The device according to the embodiment of FIG. 3 is particularly suitable for milling plaster or plaster residues or for roughening surfaces, for example industrial floors, wall coatings or the like. It in turn consists of a hood 22 , through which a rotating shaft 26 is guided on the bottom, which receives a disk 30 at its free end, the connection of shaft 26 and disk 30 not being rigid here, however, as in FIG. 1 and 2. Rather, the disk 30 is rotatably guided on the shaft 26 , for which purpose the shaft 26 has a corresponding helical thread 26 s and the disk 30 has a corresponding guide sleeve 30 f with an associated guide mandrel (not shown).

In further contrast to the embodiments according to FIGS. 1 and 2, the shaft is formed out as a solid shaft 26 and the disk 30 has on its surface 10 facing o of the masonry 10 end surface an abrasive layer 36, which here consists of corundum.

In addition, a handle 40 is attached to the hood 22 . The design and arrangement of the suction line 34 again corresponds to that according to FIGS. 1, 2.

The device according to FIG. 3, like the device according to FIGS. 1 and 2, is guided against a surface to be cleaned. Subsequently, the shaft 26 is set in rotational movement, whereupon the disk 30 is automatically moved (due to the centrifugal forces) via the oblique groove 26 s and the corresponding mandrel in the direction of the surface 10 o and against it, where it is - under slight pressure - its Can fulfill the grinding function and milled off residues of plaster or mortar or roughened the surface 10 o.

In all cases, the device 20 can be guided in rotating movements over the surface to be cleaned and thus enables light, rational, easy, inexpensive and safe handling.

Claims (18)

1. Device for cleaning surfaces ( 10 o) with

• a bell-like hood ( 22 ) which can be placed on the surface to be cleaned ( 10 o) via a circumferential seal ( 24 ),
• - One, inside the hood ( 22 ) and at a distance from the hood guided disc ( 30 ), on its, the surface to be cleaned ( 10 o) facing side with a device ( 32 , 32 d, 36 ) for physical and / or chemical removal of the surface ( 10 o) is formed, as well
• - A suction line ( 34 ), which extends above the disc ( 30 ) from the hood ( 22 ), and
• - At least three spaced-apart sliding feet ( 50 ) which are arranged so that their sliding surfaces ( 52 ) parallel to the surface to be cleaned ( 10 o) in the section of the device enclosed by the seal ( 24 ).

2. Apparatus according to claim 1, with three sliding feet ( 50 ), each offset by 120 ° to one another. 3. Apparatus according to claim 1 or 2, wherein the sliding feet ( 50 ) on the inner wall of the hood ( 22 ) or on the disc ( 30 ) are attached. 4. Device according to one of claims 1 to 3, wherein the seal ( 24 ) consists of an elastic lip formed on the free edge region ( 22 r) of the hood ( 22 ). 5. Apparatus according to claim 4, wherein the seal ( 24 ) consists of an at the free edge region ( 22 r) of the hood ( 22 ) formed brush ring. 6. Device according to one of claims 1 to 5, wherein the disc ( 30 ) can be rotated within the hood ( 22 ). 7. Device according to one of claims 1 to 6, in which the device ( 32 , 32 d) for physical and / or chemical removal of the surface ( 10 o) consists of at least one nozzle which can be acted upon by air and / or a liquid. 8. Apparatus according to claim 7, wherein the disc ( 30 ) is designed as a hollow disc which can be pressurized with air and / or liquid under pressure on one side by a supply line ( 26 ) and on the other side the nozzle (s) ( 32 , 32 d) has (have). 9. Apparatus according to claim 7 or 8, wherein the nozzle (s) ( 32 , 32 d) is directionally adjustable and / or interchangeable. 10. Device according to one of claims 1 to 9, wherein the device ( 36 ) for physical and / or chemical removal of the surface ( 10 o) consists of a friction body. 11. The apparatus of claim 10, wherein the friction body from a or multiple brushes. 12. The apparatus of claim 10, wherein the friction body ( 36 ) consists of a grinding wheel. 13. Device according to one of claims 1 to 12, wherein the disc ( 30 ) relative to the surface to be cleaned ( 10 o) is vertically adjustable within the hood ( 22 ) angeord net. 14. The apparatus of claim 13, wherein the disc ( 30 ) on a threaded guide ( 36 s) formed shaft ( 36 ) is arranged, the disc ( 30 ) flee due to force during rotation in the direction of or against the surface to be cleaned ( 10 o) leads. 15. Device according to one of claims 1 to 14, wherein the disc ( 30 ) is formed with openings. 16. Device according to one of claims 1 to 15, wherein the hood ( 22 ) has a handle part ( 40 ) on the outside. 17. Device according to one of claims 1 to 16, wherein the sliding surfaces ( 52 ) are articulated to the sliding feet ( 50 ). 18. Device according to one of claims 1 to 17, in which the sliding feet ( 50 ) are articulated in a longitudinally adjustable manner.