EP0031167A2

EP0031167A2 - Method and mold for constructing a concrete floor

Info

Publication number: EP0031167A2
Application number: EP80108150A
Authority: EP
Inventors: Kiyokazu Takimori
Original assignee: Individual
Current assignee: Individual
Priority date: 1979-12-22
Filing date: 1980-12-22
Publication date: 1981-07-01
Also published as: JPS5689655A; EP0031167A3

Abstract

A number of module molds (1,9) comprising a web (2,2'), a plurality of reinforcing ribs (5,5'), an insert piece (7) at one end of the web, a deposit margin (6) at the other end of the web, and abutments (8,8') at both side ends of the web, are arranged in line and in file along beams (11) and concrete is placed over the arranged molds.

Description

The invention relates to a method for constructing a concrete floor by combination of a deck with concrete casting on site, and to a module mold suitable for carrying out said floor constructing method.
Proposals for covering a floor with concrete have heretofore been made by use of a plurality of temporary molds or forms to define spaces to be filled with concrete cast in situ, with removal of the molds after setting or by combination of a plurality of cross molds with concrete cast in situ. The use of temporary molds requires much labor such as assembly, removal, transportation, and storing as well as field materials such as supports and the like which cost much and have not been currently employed.
On the other hand, a concrete floor covering using cross molds is made in such a manner that a plurality of as-deposited molds is bridged over longitudinal beams on the lower floor with one series of the molds B' being thinner than the other molds B to provide for zones which are to withstand heavy loads, as shown in Figs. 7 and 8, and that concrete C is then placed--over the molds. This requires edge plugs fitted between the ends B" of the adjacent molds. These plugs are fitted between gaps defined by the adjacent molds and welded to them which involves much labor and cost and elevates the floor to a level D requiring a large quantity of concrete.
The floor shown in Fig. 8 is framed by engaging pairs of Z hangers E, E' in the flanges of the respective beams A to receive the molds B between them on which concrete C is placed. The differences in thickness of the concrete layer depend on the lengths of the hangers in pairs. This floor covering provides a floor of small thickness and requires no edge plugs but needs the hangers E to be secured by welding thereby resulting in increased cost and labor. It it therefore desirable to lay a floor with a durable structure but in a simple manner and at a low cost.
The features and advantages of the invention as claimed will become apparent upon consideration of the specification and the accompanying drawing, in which:

Fig. 1 is a perspective view of a surface horizontal type mold in accordance with the present invention partially broken off;
Fig. 2 is a perspective view of the mold of Fig. 1 viewed from the back;
Fig. 3 is a perspective view of a modified form of the mold;
Fig. 4 is a longitudinal section of the molds joined to each other;
Fig. 5 is a cross section of the molds on which concrete is placed;
Fig. 6 is a cross section of the molds each being provided with an abutment formed at the center of the mold; and
Figs. 7 and 8 are cross sections each showing the floor structure according to the prior art.

Referring to the drawing, particularly Fig. 1, one embodiment of the invention is shown as a surface horizontal or flat surface mold 1 which includes a web 2 and a plurality of reinforcing ribs 5 extending downwards and spaced at a suitable interval W therebetween. Each of the ribs 5 comprises two divergent walls 3 and a base 4. Each of the webs 2 is provided at its opposite ends with a narrow deposit margin 6 and an insert piece 7 at a right angle, respectively. As shown in Fig. 2, the other opposite ends of the mold 1 are forced (formed, compressed) on the back of the mold to provide widths W" in such a manner that the respective bases 4 lie flat upon the web 2 thus forming abutments 8 at the respective opposite ends.
Fig. 3 shows a further embodiment of the present invention, wherein the other opposite ends of the mold 9 are forced (formed, compressed) from the opposite sides thereof (or from above and below) in such a manner that the web 2' and the basis 4' are deformed to form abutments 8' which are positioned between the web surface and the base faces thereby obtaining an elongated hexagon, if viewed from the side. If a mold is dimensioned to add one length L to the other length L' of the mold 1 or 9, the intermediate portion of the mold 1 or 9 may be formed or pressed flat in such a manner that the ribs form an intermediate abutment 10 to be laid on the beam 11.
The abutment 8 or 8' of the mold 1 or 9 fabricated as described above is engaged in and welded to the beam 11, as shown in Fig. 5. In this manner, a plurality of molds may be arranged in line perpendicular to the axis of the beam. On the other hand, when a plurality of molds is arranged in file parallel to the axis of the beam, as shown in Fig. 4, the insert piece 7 of one mold 1 or 9 is mounted in the foremost rib 5 of the other mold 1' or 1" whereas the deposit margin 6 of one mold is placed under the web. After the molds are laid all over a certain floor, concrete 12 is placed on top to smooth its surface 13.
The mold 1 or 9 is made of steel, stainless steel, aluminum, fiber reinforced plastics, etc. Although not shown in the drawing, it may be coated with a refractory material and include a basis 4,4' adapted for draining. Further, the web may be ribbed or slightly curved to prevent the web from deflecting due to the weight of the concrete.
Fig. 5 shows a combination of two types to the molds such as the flat surface mold 1 and the crown surface mold 9. In this combination, the concrete may be placed in such a manner that it is rather thick on the flat surface mold to withstand a heavy load and thin on the crown surface mold to withstand a smaller load. For this reason, the flat surface mold is used for floors where heavy material or equipment is installed. Although the molds of the combination type are shown in Fig. 5 it is entirely a matter of choice depending on the nature of -1 the building whether the flat surface mold or the crown surface mold is used.
As described above, the flooring constructed in accordance with the present invention does not require edge plugs nor hangers which are necessary in the prior art methods, but the molds are simply arranged planar along the beams and concrete is placed thereon. No skill is required to execute the work because of the method's simplicity. Furthermore, no accessories are employed so that the trouble and labor of mounting, removal, and adjustment are fully eliminated. In addition, the reinforcing ribs 5 are formed on the backs of the molds to render thin steel materials withstandable to greater loads and to obtain a solid and optically pleasing concrete floor.

Claims

1. A method for constructing a concrete floor characterized by employing a module mold which includes a web, a plurality of reinforcing ribs each having walls extending downward from the web and a base connected to said walls, an insert piece extending parallel to said walls and provided at one end of the web, and abutments formed at the opposite ends of the web; arranging the molds in a desired number in line and in file along beams, and placing concrete over the arranged molds.

2. A method in accordance with claim 1 wherein said module mold is a flat surface mold including abutments formed by said reinforcing ribs by pressing them flat at opposite ends to the level of the web.

3. A method in accordance with claim 1 wherein said module mold is a crown surface mold including abutments formed by said reinforcing ribs by compressing them at opposite ends to a level between the height of each rib.

4. A method in accordance with any of claims 1-3 wherein said module mold includes an abutment formed by compressing an intermediate portion of said ribs transversely to the axis thereof.

5. A method in accordance with any of claims 1-4 wherein a plurality of said flat surface or crown surface molds is arranged side by side along said beams in a desired number, and concrete is placed over the continuously arranged molds.

6. A module mold comprising a web (2,2'), a plurality of reinforcing ribs (5,5') each having walls (3,3') extending downward from the web and a base (4,4') connected to said walls, an insert piece (7) extending parallel to said walls and provided at one end of the web, and abutments (8,8') formed at the opposite ends of the web.

7. A mold in accordance with claim 6 which is a flat surface mold (1) including abutments (8) formed by pressing said reinforcing ribs (5) at opposite ends to the level of the web (2).

8. A mold in accordance with claim 6 which is a crown surface mold (9) including abutments (8') formed by compressing said reinforcing ribs (5') at opposite ends to a level between the height of the ribs (5').

9. A mold in accordance with any of claims 6-8 including an abutment (10) formed by compressing an intermediate portion of said ribs (5,5') transversely to the axis thereof.