WO2005056923A1

WO2005056923A1 - Improved concrete-spreading and -smoothing tool

Info

Publication number: WO2005056923A1
Application number: PCT/ES2004/000392
Authority: WO
Inventors: Juan Ruiz Ubeda
Original assignee: Juan Ruiz Ubeda
Priority date: 2003-12-11
Filing date: 2004-09-06
Publication date: 2005-06-23

Abstract

The invention relates to an improved concrete-spreading and -smoothing tool. The invention consists of a scraper drag comprising a ladle (2), two runners (3) and a handle (5). The aforementioned ladle (2) comprises a rectangular metal sheet having two folds such as to form three parts, namely: a central section (2.2), a large section (2.1) and a small section (2.3). According to the invention, each part of the scraper drag has a determined function, i.e. the large section is used to distribute the concrete, the central section is used to smooth the concrete and the small section prevents the central section from penetrating the concrete during the smoothing process, owing to the angle of inclination thereof in relation to said central zone. Moreover, the circular runners (3) are used for two functions, namely: to facilitate the sliding of the scraper drag over the iron framework and, depending on the size thereof, to determine the height of the compression layer.

Description

IMPROVED TOOL FOR EXTENDED AND CONCRETE CONCRETE

OBJECT OF THE INVENTION

This invention relates to a new type of hand tool that allows to easily distribute the concrete poured in bulk over a metal reinforcement or mesh, obtaining a compact, smooth and uniform height compression layer.

BACKGROUND OF THE INVENTION

Currently there are different types of tools on the market that are used for the extension of concrete for the construction of slabs and slabs of all kinds. These tools have not been specifically designed for this type of work, but rather come from those used in agriculture, being particularly hoes and others similar. Since the extension of concrete is a manual work, the use of inappropriate tools implies excessive work by the operators, who must also use guides and rules to obtain the height specified in the design of the compression layer. In addition, smoothing work must be carried out by at least two operators, each holding one end of the ruler, and sliding it on two parallel guides, which must then be removed before the concrete hardens.

All these operations involve the participation of several operators in an extremely simple task, and the use of different tools that must be cleaned up, finally making the cost of the work more expensive. In order to facilitate the spreading of concrete, the author of this invention has created a specific tool described below. DESCRIPTION OF THE INVENTION

This invention consists of a drag shovel composed of a metal sheet, two wheels or skates and a handle. It has two specific functions, one of concrete distribution and another of smoothing. To use each blade function, it must be rotated 180 °. The rectangular metallic sheet has two folds that make up a spoon with three parts: a central fin and a major fin and a minor fin. Each part of the shovel has a certain function. - The major fin is used to distribute the concrete. - The central fin is used for concrete smoothing. - The minor fin prevents the central area from getting stuck in the concrete during the smoothing process, due to its angle of inclination with respect to said central area. - Circular skates have two functions: 1) They facilitate the sliding of the blade on the iron armor. 2) The radius of the same determines the height of the compression layer. This means that by changing the skates for others of different sizes, a compression layer of greater or lesser height can be obtained depending on the needs. - The handle can be of different types, smooth or with handle.

DESCRIPTION OF THE DRAWINGS

To complement the description of the invention and in order to facilitate the understanding of its characteristics, a series of figures are attached in which, with an illustrative and non-limiting nature, the following has been represented: Figure 1 A is a plan view of the blade (1), in which the following components stand out: (2) Spoon. (3) Skates. (4) Reinforcement rods. (5) Mango. (5.1) Handle holder Figure IB is a profile view of the blade (1), which highlights the following components: (2) Spoon. (2.1) Major fin. (2.2) Central fin. (2.3) Minor fin. (2.4) Angle α (3) Skates. (3.1) Screws. (4) Reinforcement rods. (5) Handle (5.1) Handle holder

Figures 2A and 2B are perspective views of the blade (1), in the extended and smoothed position of the concrete respectively. The following components stand out in these figures: (2) Spoon. (2.1) Major fin. (2.2) Central fin. (2.3) Minor fin. (3) Skates. (3.1) Screws. (4) Reinforcement rods. (5) Mango.

Figures 3A, and 3B, show a plan and profile view, respectively, of a variant of the blade (1), which only serves to the extended concrete. The following components stand out in these figures: (2) Spoon. (2.1) Major fin. (3) Skates. (3.1) Screws. (4) Reinforcement rods. (5) Mango. (5.1) Handle holder.

Figure 4 is a perspective view of a practical case, in which the blade (1) is observed in a concrete extended position. The following components stand out in these figures: (2) Spoon. (2.1) Major fin. (2.2) Central fin. (2.3) Minor fin. (3) Skates. (4) Reinforcement rods. (5) Mango. (6) Concrete. (7) Metal armor.

Figure 5 is a perspective view of a previous case, in which the blade (1) rotated 180 ° is observed, in a concrete smoothing position, once the spreading process is completed. The following components stand out in these figures: (2) Spoon. (2.1) Major fin. (2.2) Central fin. (2.3) Minor fin. (3) Skates. (4) Reinforcement rods. (5) Mango. (6) Concrete. (7) Metal armor.

PREFERRED EMBODIMENT OF THE INVENTION

Among the different types of tools for smoothing concrete that can be built based on this invention, the preferred embodiment is as described below:

Starting from a flat metal sheet of steel, approximately 40 x 30 cm, it is cold folded into two parts according to the figures, to form the three parts of the spoon (2), that is, the greater fin (2.1), 1A fin central (2.2) and the minor fin (2.3). At the angle α, which forms the central fin and the minor fin is between 15 ° and 45 °, in order to prevent the blade (1) from sticking into the concrete (6). The handle holder (5.1) is then fixed by welding its conical end at the intersection of the central fin (2.2) and the major fin (2.1). The reinforcing rods (4) are also welded between the handle holder (5.1) and the central fin (2.2).

Finally, the two circular skates (3) are placed by fixing them to the smaller fin (2.1) with two screws (3.1), or by welding.

Once the set is finished, the most suitable handle (5) is placed according to the user's tastes. This handle (5) can be totally smooth or it can have a handle at its free end.

Claims

1 - Improved tool for spreading and smoothing concrete characterized in that it is composed of a metal spoon, two skates, two reinforcing rods, a handle holder and a handle.

2 - Improved tool for spreading and smoothing concrete according to claim one, characterized in that the metal spoon is composed of three parts, a major fin, a central fin and a minor fin.

3 - Improved tool for spreading and smoothing concrete according to previous claims, characterized in that when used in the concrete spreading position, interchangeable skates of different sizes determine the height of the compression layer.

4 - Improved tool for spreading and smoothing concrete according to previous claims, characterized in that when used in the concrete smoothing position, the angle formed by the central fin and the minor fin allows the tool to slide easily without nailing.

5 - Improved tool for extending and smoothing concrete characterized in that, the simple version is composed of a trimmed metal spoon, two skates, two reinforcing rods, a handle holder and a handle.

6 - Improved tool for spreading and smoothing concrete according to claim 5, characterized in that the metal spoon is composed only of the major fin that allows the concrete to be extended.