TECHNICAL FIELD

The present disclosure relates to a scraping disc, a scraping disc arrangement and an apparatus comprising the same.

BACKGROUND

There are many variables that affect the surface quality of a floor having composite material applied thereon. Examples of composite materials are concrete or terrazzo. A common issue arising that affect the quality of the floor are the creation of air bubbles/air pores (which become open air bubbles after grinding thereon) on the surface which can be the consequence of improper use of release agents or excess water within a concrete mix. Open air bubbles have an unfavourable effect on the composite material surface and should be treated so that the air pores/bubbles are properly filled to have an even flat surface. Thus, a floor having composite material thereon with air bubbles/pores will eventually be required to have remedial work carried out on the surface to ensure compliance with specifications.

Conventionally, the remedial work is performed by manually filling the air pores with a floor mass, e.g. spackle mass by scrape spackling the floor with such a floor mass - so to obtain an evenly flat floor with covered open air pores. However, a common issue with such a method is that it is required to be done a repeated number of times in order to fill the air pores/bubbles, otherwise air may burst out of the floor mass after appliance.

A disadvantage of the current methods of filling air pores on a floor is that it, especially for in case the floor is large, takes a long time to do and is not ergonomically optimal. Accordingly, there is a need for apparatuses for filling of air pores that in a time-efficient manner can scrape spackle an area.

Specifically, there is a need for a scraping disc arrangement for an apparatus arranged to scrape spackle a composite material floor that can fulfil requirements of time-efficiency and convenience. SUMMARY

It is therefore an object of the present disclosure to provide a scraping disc arrangement, an apparatus and a scraping disc to mitigate, alleviate or eliminate one or more of the aboveidentified deficiencies and disadvantages. Specifically it is an object of the present disclosure to provide a scraping disc arrangement, an apparatus and a scraping disc that allows for improved scrape spackling of floors with air pores/bubbles thereon in terms of time-efficiency and convenience for a user.

This object is achieved by means of the scraping disc arrangement, apparatus and scraping disc as defined in the appended claims. The present disclosure is at least partly based on the insight that by providing a scraping disc arrangement, an apparatus and a scraping disc, spackle scraping a floor will be improved in terms of time-efficiency and convenience.

The present disclosure provides a scraping disc arrangement for an apparatus arranged to scrape spackle a composite material floor (which may be concrete or terrazzo). The scraping disc arrangement comprises a mother disc. Further comprising three rotating discs attached to said mother disc, the rotating discs being arranged to, rotate, in at least one rotating direction, by a motor arrangement. Further, each of said rotating discs comprises a floor facing surface and an opposing mother disc facing surface, the floor facing surface comprising a plurality (e.g. two) of protruding arcs extending along said floor facing surface.

The protruding arcs being arranged to (upon rotation of a disc and coming into contact with floor mass) distribute floor mass at least partly along an inner portion of floor facing surfaces of each corresponding rotating disc. Floor mass may be a cement-based putty.

The scraping disc arrangement provides the advantage of allowing any floor mass that is to be scrape spackled over the floor to cover e.g. air pores is done so in an efficient manner. The distribution of protruding arcs at each disc allows for the scraping disc arrangement to scrape spackle a floor area a repeated number of times when sweeping over the floor area.

Accordingly, the protruding arcs provide at least the benefits of increasing the scraping efficiency and distributing floor mass in an improved manner over a floor area. In other words, centrifugal powers, which usually would disperse a floor mass away from each disc, reducing scraping capability, will be reduced by the scraping disc arrangement herein. Thus, scraping will be improved in terms of efficiency and open air pores will be covered in a robust manner.

Further, a rotational speed of said mother disc and/or each rotating disc may be arranged to be adjustably controlled, a maximum rotational speed thereof being within a range of 30 - 1000 rotations per minute and a minimum speed thereof being 0 rotations per minute.

Further, each protruding arc may have a thickness of 8-17 mm, preferably 10-15 mm. Such thickness range allow for increased scraping capability over a floor without damaging the floor.

Moreover, each of said protruding arcs may have a crescent shape or a crescent shape with a truncated end. A crescent shape may be advantageous based on that it has an increasing thickness allowing for floor mass to be efficiently lead towards inner portions of each disc.

Moreover, each floor facing surface may comprise a first and a second section dividing said floor facing surface. Each of said sections may comprise a first and a second protruding arc. The first and second section may equally divide said floor facing surface. Each first and second protruding arc may be arranged to, upon rotation of each disc over a composite floor having a floor mass thereon, jointly steer said floor mass across an inner portion of said disc. In some aspects the first and second protruding arc are arranged to steer said floor mass along an S- shaped route in a corresponding section.

Each arc may comprise an inwards-bending surface (i.e. concave), wherein the inwards- bending surface of the first and second protruding arc in each section faces different directions.

The protruding arcs of said first and second section may be arranged to, upon rotation of a corresponding rotating disc over a floor having floor mass thereon, distribute floor mass in different directions relative each other. Accordingly, the scraping process is improved.

The three discs may jointly form a V-formation when attached to said mother disc. An advantage of a V-formation is that the floor mass can be optimized in terms of distribution over the area in which the mother disc covers.

The inwards-bending surface of one of said first and second protruding arc is positioned to face an edge portion of the other protruding arc. Such a configuration allows floor mass to be directed from a first arc to a second arc thereby more efficiently steering and distributing floor mass over the disc surface.

Further, a part of an outwards-bending surface of one of each first and second protruding arc is associated to a periphery of a disc thereof, and wherein a part of the outwards-bending portion of the other protruding arc in a respective section, is associated to a centre portion of said disc. Accordingly, such an aspect herein improves the distribution of floor mass across the disc since floor mass in contact with the disc will be, by the outwards-bending surface of one arc being in contact with the periphery of a disc be following the contour of the arc towards the disc inner portion. In other words, one of the arcs may have a part associated to a periphery which in turn may extend towards a centre portion of the disc.

The mother disc may be arranged to, upon rotation by said motor arrangement, move a tension roller arrangement, thereby rotating each disc around a corresponding disc attachment axle. In other words, the mother disc may have a mother disc axis which it rotates around, and each disc may further have a corresponding disc attachment axis which, upon rotation of the mother disc, rotates each disc around a disc attachment axis thereof. In some aspects, the tension roller arrangement may be arranged to rotate two of three discs in a rotation direction and a third disc in an opposite direction, thereby further improving distribution of floor mass. There is further disclosed an apparatus arranged to scrape spackle a composite material floor, said apparatus comprising the disc arrangement according to any aspect herein.

Further, the disclosure relates to a scraping disc attachable to a mother disc of an apparatus arranged to scrape spackle a composite material floor. The scraping disc comprising a floor facing surface and an opposing mother disc facing surface, the floor facing surface comprising a plurality of protruding arcs extending along said floor facing surface. The protruding arcs being arranged to, upon rotation of said scraping disc, in at least one rotating direction, distribute floor mass at least partly along an inner portion of said floor facing surface of said rotating disc. It should be understood that the scraping disc herein may comprise any feature of the rotational discs of said scraping disc arrangement disclosed herein.

The protruding arcs may be detachably attached to each rotational disc/scraping disc. Thus, each disc may have a receiving portion arranged to detachably secure a protruding arc. The protruding arcs and rotational discs may be formed by a plastic material, e.g. polypropylene.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following the disclosure will be described in a non-limiting way and in more detail with reference to exemplary embodiments illustrated in the enclosed drawings, in which:

Figure 1 illustrates a top view of a mother disc in accordance with aspects herein;

Figure 2A illustrates a top view of a rotating disc in accordance with aspects herein;

Figure 2B illustrates an objective view of a rotating disc in accordance with aspects herein;

Figure 3A illustrates a back view of a mother disc in accordance with aspects herein;

Figure 3B illustrates a side view of a mother disc in accordance with aspects herein;

Figure 4A illustrates a side view of an apparatus in accordance with aspects herein;

Figure 4B illustrates a top view of an apparatus scrape spackling floor mass over a composite floor to cover air pores on said composite floor.

DETAILED DESCRIPTION

In the following detailed description, some embodiments of the present disclosure will be described. However, it is to be understood that features of the different embodiments are exchangeable between the embodiments and may be combined in different ways, unless anything else is specifically indicated. Even though in the following description, numerous specific details are set forth to provide a more thorough understanding of the provided apparatus and arrangement, it will be apparent to one skilled in the art that the apparatus may be realized without these details. In other instances, well known constructions or functions are not described in detail, so as not to obscure the present disclosure.

Figure 1 illustrates a top view of a scraping disc arrangement 1 for an apparatus arranged to scrape spackle a composite material floor, the scraping disc arrangement comprising a mother disc 2. Three rotating discs 10 attached to said mother disc 2, the rotating discs 10 being arranged to, rotate, in at least one rotating direction rl, by a motor arrangement 20. Further, each of said rotating discs 10 comprises a floor facing surface 11 and an opposing mother disc facing surface 12. The floor facing surface 11 comprising a plurality of protruding arcs 15 extending along said floor facing surface 11. The protruding arcs 15 are arranged to distribute floor mass at least partly along an inner portion pl of floor facing surfaces 11 of each corresponding rotating disc 10. In other words, at a rotating state of said scraping disc arrangement 1, in which three rotating discs 10 are rotating over a floor mass, each rotating disc 10 is arranged to distribute floor mass at least partly along the inner portion pl of a floor facing surface 11 thereof.

Figure 1 schematically illustrates with arrows al that the floor mass is distributed to said inner portion pl once the floor mass contacts with the disc 10 which is rotating in a rotating direction rl. The term 'distribute' herein may also refer to that the floor mass is scraped against the floor that the floor mass is spread on. Thus, each rotating disc 10 is arranged to distribute floor mass and scrape spackle said floor mass on said floor.

As further illustrated in Figure 1, each of said protruding arcs 15 may have a crescent shape or a crescent shape with a truncated end 16. Such shapes allow for increased control of the distribution of floor mass. As illustrated in Figure 1, each disc 10 preferably has 4 protruding arcs 15, however the disclosure is not limited to 4 protruding arcs per disc and may have at least two.

Figure 1 further illustrates that the three discs 10 jointly form a V-formation when attached to said mother disc 2, thereby increasing the scraping efficiency when in a scrape spackle process.

Figure 2A illustrates a rotating disc/scraping disc 10 from a top view. Figure 2A illustrates that each arc 15 comprises an inwards-bending surface 17a, wherein the inwards-bending surface 17a of the first and second protruding arc 15a, 15b in each section faces si, s2 different directions. Thus, Figure 2A shows that the inwards-bending surface 17a of the first arc 15a faces towards a dividing line 18 (dividing sections si and s2), and the inwards-bending surface 17b of the second arc 15b faces away from the dividing line 18. Such a configuration allows floor mass to be directed in an S-shaped route thus increasing the scraping performance and distribution capability. As further shown in figure 2A, the first and the second protruding arc 15a and 15b may form an S-shaped route (denoted S') extending along the dividing line 18. The S-shaped route S' may be referred to as a route the floor mass transfers when said rotating disc 10 is scraping, by rotating, a floor with floor mass thereon.

Figure 2A further illustrates that the protruding arcs 15 of said first and second section si, s2 are arranged to, upon rotation over a floor having floor mass thereon, distribute floor mass in different directions relative each other. Thus, increasing scrape spackling performance. In other words, the protruding arcs 15 of said first and second section si and s2 may be oriented mirrored relative each other as shown in Figure 2A. Thus, the arcs 15 of first section si may be mirroring the arcs in the second section s2.

Figure 2B illustrates an objective view of a rotating disc 10, wherein each protruding arc 15 has a thickness tl of 8-17 mm, preferably 10-15 mm.

As illustrated in Figures 1-2B, the inwards-bending surface 17a of one of said first and second protruding arc 15a, 15b is positioned to face an edge portion el of the other protruding arc. Such a configuration allows for the S-shaped S' route and interaction between two arcs so to control mass between a larger surface along said disc 10.

As shown in Figure 2B, a part of an outwards-bending surface 17b of one of each first and second protruding arc 15a, 15b (in respective sections SI, S2) are associated to a periphery 28 of a disc 10 thereof, and wherein a part of the outwards-bending portion 17b of the other protruding arc in a respective section SI, S2, is associated to a centre portion cl (which in some aspects herein may be same as the inner portion pl) of said disc 10. Associated to the periphery may refer to that a part of the disc is in contact with said periphery as shown in figures 2A-2B. Advantageously, floor mass will be led from the periphery towards the centre in a time-efficient manner.

The present disclosure also relates to a scraping disc 10 as such, i.e. as shown in Figures 2A-2B, attachable to a mother disc 2 of an apparatus arranged to scrape spackle a composite material floor, the scraping disc comprising: a floor facing surface (shown in fig. 1) and an opposing mother disc facing surface (shown in fig.l); the floor facing surface comprising a plurality of protruding arcs 15 extending along said floor facing surface 11. The protruding arcs 15 being arranged to, upon rotation of said scraping disc 10, in at least one rotating direction rl, distribute floor mass at least partly along an inner portion pl of said floor facing surface 11 of said rotating disc 10.

Figure 3A illustrates a back view from a scraping disc arrangement 1. Figure 3A illustrates that the mother disc 2 is arranged to rotate (around a mother disc axis 23) by said motor arrangement 20 (not shown), and upon rotation, move a tension roller 21 arrangement, thereby rotating each disc 10 around a corresponding disc attachment axle 22 thereof. Accordingly, the motor may drive the mother disc axis 23. The tension roller arrangement 21, may be arranged to rotate two discs in a common direction and a third disc in the opposing direction. The tension roller arrangement 21 may be attached to the mother disc 2. The tension roller arrangement 21 may comprise a belt 25 driving the disc attachment axles 22.

Figure 3B illustrates a side view of a scraping disc arrangement 1 illustrating the connection between the tension roller arrangement 21, mother disc 2 and the rotating discs 10.

Figure 4A illustrates from a side view an apparatus 100 arranged to scrape spackle a composite material floor, said apparatus 100 comprising the disc arrangement 1 according to any aspect herein. A rotational speed of said mother disc 2 and/or said rotating discs 10 of said apparatuslOO is arranged to be adjustably controlled, a maximum rotational speed thereof being within a range of 30 -1000 rotations per minute and a minimum speed thereof being 0 rotations per minute. Thus, the apparatus 100 may be arranged to adjust a rotating speed of the discs 2, 10 from 0 rpm to a maximum of 30-1000 rpm, when operating on a composite floor.

Figure 4B illustrates from a top view, a composite floor 200 having air pores 202 thereon which are to be scrape spackled by the apparatus 100 herein. Accordingly, there is floor mass 201, on the floor 200. The apparatus 100 being arranged to distribute the floor mass 201 to fill, by scrape spackling said air pores 202 on said composite floor 200. Thus, the apparatus 100 in Figure 4B is arranged to scrape spackle the areas in which floor mass 201 is applied, so to scrape the floor mass 201 against the air pores 202.