JPH01203550A - Complex floor panel - Google Patents

Abstract

PURPOSE:To improve sticking strength between a steel plate and cement composite, and to prevent protrusions from being extracted, by providing hangovers at the tips of the protrusions that are made on the steel plate by punching, and erecting the punched parts. CONSTITUTION:Protrusions 2 are made at several positions of a steel plate 1 by punching except some parts and by erecting the punched parts, and overhangs are provided at the tips of the protrusions 2. A cement composite is placed against the protrusion-provided steel plate 1, and the protrusions 2 are penetrated into the cement composite, and a floor panel is constructed thereby after hardening. With such arrangement, the steel plate 1 and the cement composite are stuck firmly, making the protrusions 2 hard to be extracted and giving high resistivity against large-scale deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composite floor panel made of a cement-based hardened material and a steel plate, which is used as a floor panel.

[Prior art]

Composite panels made by bonding and laminating fiber-reinforced cement boards and steel boards have been put into practical use as flooring materials, etc.
No. 9-63126). Composite floor panels bonded and laminated using adhesive resin may have performance fluctuations depending on the working environment conditions at the time of manufacture.

In addition, the surface performance of the cement board has a large effect, and if the surface layer has low reinforcement due to efflorescence, etc., the strength of the adhesive layer will be low, leading to a decrease in product performance.

In order to improve this problem, a mechanically composite floor panel has been proposed (Utility Model Application Publication No. 89122/1989). This floor panel is made by pouring a soft cement-based composition into a steel plate frame with projections and allowing it to harden. Regarding this protrusion, the shear cross-sectional area that one protrusion carries is A5
, the bearing area is AC, and the shear strength of the cement-based hardened material is τ. , σ is the compressive strength. When closed, As・τ0≦AC
・σ, (1) The dimensions are limited to satisfy the following relational expression. Since this restriction must be satisfied by one protrusion in all directions within the plate surface, the shape of the protrusion is determined by punching a steel plate 1 and forming a three-dimensional protrusion 2, as shown in FIG. 13, for example. It is necessary to create it. Therefore, when a protrusion is punched out of a steel plate, a simple calculation will show that a circular hole with a diameter twice the height of the protrusion or a square hole with sides twice as large will be punched. In other words, the height of the protrusion must be increased (then the hole will be too large, and the height of the protrusion must be lowered. Also, it is difficult to pour the cement-type composition into the interior of the protrusion). It also comes with great difficulty.

In addition, the inventors attached various protrusions to steel plates and examined the effect of fixation with cement-based hardened materials. As a result, the protrusions (
It has been found that it is not sufficient to satisfy the formula 1). In other words, at the interface between the cement-based cured material and the steel plate, there is (1
) In addition to the shear force and compressive stress considered in the formula, there is a force that tries to separate the steel plate from the cement-based hardened material, so
It was found that as the deformation progressed, the protrusions were removed from the cement-based hardened material and the deformation ability decreased.

[Object of the Invention] This invention has been made in view of the above circumstances. The purpose of this is to have a high adhesion strength between the steel plate and the cement-based hardened material, to prevent protrusions from falling out due to deformation, to easily and densely fill the interface with the steel plate with the cement-based composition, and to improve the workability of the steel plate. To provide a composite floor panel made by firmly laminating a good W4 board and a cement-based hardened material.

[Structure of the invention]

This composite floor panel is a composite floor panel made by laminating a hardened cement material and a steel plate, and has protrusions formed by punching out and cutting out a portion of the steel plate at multiple locations. , the protrusion penetrates the cement-based cured material layer, and the protrusion has an overhang at its tip.

The steel plate used in this invention has a thickness of 0.4 to 2.0
For example, as shown in Fig. 1, a steel plate 1 is punched into a T-shape in plan view with one side left open, and the remaining side is bent to form a protrusion 2 with a rectangular overhang 3 at the tip. do. The protrusion 2 can be easily manufactured in a planar shape, but it may also have a curvature as shown in FIG. 2 in order to increase the rigidity of the protrusion.

In a composite panel in which a cement-based composition is placed in contact with the steel plate 1 provided with the protrusions 2 in this manner and hardened, and the protrusions 2 are penetrated into the cement-based cured material layer, the protrusions 2 are In the direction perpendicular to the plane, the steel plate and the cement-based hardened material exert a large resistance against the force that tends to shift, but in the direction parallel to the plane, the resistance force is small.

However, if the surfaces of adjacent protrusions are shifted by 90' so that they are perpendicular to each other, a large resistance force can be applied to the surface of one of the protrusions even against forces in the parallel direction.

Therefore, it is not necessary for each of the protrusions to satisfy formula (1) with respect to deviations in all directions between the steel plate and the cement-based hardened material, and it is sufficient that formula (1) holds true for the panel as a whole.

That is, A2 is the total area of the panel, AC is the sum of the areas of protrusions in a certain direction, and τ is the shear strength of the cement-based hardened material. , where the compressive strength is σ, it is sufficient to satisfy Ap·r, ≦Ac·σc (2). When the surfaces of the protrusions are aligned in two orthogonal directions, the effective area for preventing displacement is the smallest in the direction parallel to the surfaces, so (2) It is enough if it is established. Further, the protrusions may be arranged alternately in two directions, or groups of protrusions oriented in the same direction may be arranged alternately. However, 1
It is better to arrange them alternately one by one from a local perspective.

In this composite floor panel, a T-shaped rectangular projecting part 3 is provided on the projecting part 2 shown in FIGS. 1 and 2 in order to increase the resistance against pulling out of the projecting part. .5.
There is one with the shape shown in Figure 6. Figure 3 shows a protrusion 2 with an enlarged protrusion 3 at the tip, Figure 4 shows a protrusion 2 with a triangular protrusion 3 at the tip, and Figure 5 shows the protrusion 2 at the tip. A tapered protrusion 2 with a triangular protrusion 3; FIG. 6 shows a tapered protrusion 2 with a rectangular protrusion 3 at its tip. Although any of the protrusions contributes to increasing the pulling resistance, the simple shape shown in FIG. 3 is advantageous from the viewpoint of workability of the steel plate.

To manufacture this composite floor panel, the steel plate must be placed at multiple locations.
A part is left uncut and punched out, the - part is cut and raised as a bent part to form a protrusion with an overhang, this steel plate is framed with the protrusion inside, and a cement-based composition is placed inside. Pour and cure. As the curing method, natural curing, steam curing or autoclave curing can be selected. Therefore, it is desirable that the steel plate be of a type that does not rust under these curing conditions. For example, in the case of natural curing, a galvanized steel plate can be used, but since it will rust due to alkali when it comes into contact with a cement-based composition, the inner surface must be coated with anti-corrosion coating. In the case of steam curing, colored galvanized iron coated with polyester is preferred, and in the case of autoclave curing, steel plates coated with fluororesin or phenol resin, which have even higher heat resistance, are preferred.

〔Example〕

The protrusions 2 shown in Fig. 8 were cut out at a pitch of 40 mm on the steel plate frame 5 shown in Fig. 7, which had frames 4 with a height of 25 mm formed on the four sides of a 600 x 600 mm square steel plate 1 with a thickness of 0.6 mm. It was formed. Projection 2 is T-shaped and has a width (W) of 8m.
m, height (H) 20mm, width of overhang 3 (W) 14++
un, the height (h) is 8 mm, and the surface is alternately 90°
The orientation was shifted.

A cement composition having the composition shown in Table 1 was applied to this steel plate frame to a thickness of 2.
Pour to a temperature of 60'C.

A composite floor panel (Example A) was prepared by steam curing for 5 hours.

At the same time, rectangular protrusions 2 having a width (W) of 10 mm and a height (H) of 20 a+m as shown in FIG.
Composite floor panel by pouring the cement-type composition shown in the table (Comparative Example B)
) was created.

In addition, the width (W) is 7nrm and the height (H) is 3nrm as shown in Figure 10.
, 5 mm punched protrusions 2 were formed at a pitch of 40 mm, and a composite floor panel (Comparative Example C) was produced in the same manner.

Table 1 As shown in Fig. 1, the above three types of composite panels 6 are placed on four supports 7 made of 40 x 40 mm square columns at the four corners, and a surface load 8 with a diameter of 5 o Ill I 11 is applied to the center.
was loaded. The relationship between the center load and the deflection immediately below the loading point at this time is shown in FIG.

As is clear from the figure, the panel of Example A, which has an overhang on the protrusion and provides resistance to pulling out, has an improved maximum load compared to the panels of Comparative Examples B and C, and at the same time has a deformation capacity of 2. ~3
A significant improvement was observed.

〔Effect of the invention〕

This composite floor panel is as described above. (1) The protrusions are difficult to pull out, the bonding strength between the steel plate and the cement-based hardened material is high, and it can withstand large deformations. (2) Since the protrusions have a simple shape, the cement composition can be easily and densely filled, and the occurrence of defects can be prevented. ■ Protrusions can be easily formed and manufacturing efficiency can be improved.

[Brief explanation of the drawing]

Figures 1, 2 and 3.4.5.6 are respectively a perspective view and a front view of a protrusion formed on a steel plate used in a composite floor panel of the present invention, and Figure 7 is a view of a steel plate frame used in an example. A perspective view and Figures 8, 9, and 10 are front views of the protrusions of the example and comparative example, respectively, and Figures 11 ((b) and 11 (b) are a plan view and a side view showing the strength test conditions of the composite floor panel. , 12th
The figure is a correlation graph between deflection and load of a composite floor panel, No. 13.
The figure is a front view of a protrusion formed by punching a conventional steel plate. DESCRIPTION OF SYMBOLS 1... Steel plate, 2... Protrusion part, 3... Overhang part, 4...
... Frame, 5... Steel plate frame, 6... Composite panel, 7
...Support stand, 8... Surface load. Procedural amendment (c) ゛ 1986 Japanese Patent Application No. 25312 2, Name of the invention Composite floor panel 3, Distance from the person making the amendment Hanyu Patent applicant name (211) Resident J row (Kuchigumi Zhu Shiki Company 4) , Agent address: Shadow Akasaka 5, 6-5-21 Akasaka, Minato-ku, Tokyo 107, Date of amendment order

Claims (1)

[Claims] (1) In a composite floor panel made by laminating a cement-based hardened material and a steel plate, protrusions are provided at multiple locations on the steel plate by punching out and cutting out the protrusions, leaving a part intact. What is claimed is: 1. A composite floor panel, characterized in that a portion penetrates a cement-based hardened material layer, and a projecting portion is provided at a tip of the projecting portion.