JPH05287828A - Formwork building material and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent a hole from piercing through a formwork due to contact by a vibrator, by forming a plurality of ridges at the rear surface of the formwork so that the ridges extend in parallel with one another, and by driving U-like fixtures into the top surfaces of the ridges so that each of the fixture bridges the groove between each adjacent ridges. CONSTITUTION:A plurality of ridges 3 are formed at the rear surface of a formwork building material 4, extending in parallel with one another so as to define therebetween grooves 2. U-like fixtures 5 are driven into the top surfaces 3a of the ridges 1 so that each of the fixtures bridges the associated groove 2, defining a flat surface over the top surfaces 3a. Accordingly, it is possible to prevent a hole from piercing through the formwork and so forth due to contact by a vibrator, and it is possible to enhance the workability for a concrete placing process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold building material used for pouring concrete and a method for manufacturing the same, and more particularly to a mold constructed to prevent damage due to impact of a vibrator and to strengthen the binding force with concrete. A frame building material and its manufacturing method.

[0002]

2. Description of the Related Art Conventionally, a wooden form such as veneer has been mainly used as a form used for placing concrete. Forming materials made of cement-based extruded materials are becoming widespread from the standpoints of environmental destruction and reduction of wood resource usage.
This formwork building material is used as a formwork when pouring concrete. The formwork building material is supported by an appropriate supporting member until the concrete hardens, but when the strength of the concrete reaches a predetermined level, the supporting member is removed. Then, the formwork building material is left as it is as a surface material for the concrete placing surface. If necessary, a decorative board such as tiles or stones may be attached to the surface of the remaining mold building material, or a finishing treatment such as painting may be applied.

An example of a conventional mold building material is shown in FIG. The formwork building material 1 is a long plate-shaped material made of a cement-based extruded material, and a surface in contact with concrete to be placed (hereinafter, also referred to as a back surface) has a longitudinal direction of the formwork building material 1. There are provided a plurality of recessed stripes 2 extending to the. Groove 2
Between the comrades is a ridge 3. These concave ridges 2 and convex ridges 3 have a function of strengthening the bonding force between the formwork building material 1 and the cast concrete.

[0004]

When pouring concrete, it is usual to vibrate the concrete that has been poured into the form by a vibrator to compact it. However, the form building material 1 shown in FIG. In some cases, the tip of the vibrator entered the groove 2 and the bottom surface 2a of the groove 2 was contacted by the tip of the vibrator to scoop the bottom surface 2a, resulting in a hole in the formwork building material 1.

[0005]

The formwork building material of the present invention is used as a formwork for concrete pouring, and is left as it is to be a surface material for the concrete pouring surface, In a formwork building material in which a plurality of ridges are extended in parallel, and a ridge is extended between the ridges,
It is characterized in that a U-shaped metal fitting is driven into the top surface of the ridge so as to straddle the ridge between the ridges.

The method of manufacturing a formwork building material according to the present invention comprises:
In the method for producing the mold building material, the material of the mold building material is extruded by an extrusion molding machine, the metal fitting is driven into the ridge of the material before the material is hardened, and then the material is rolled by a roller. However, the metal fitting is pushed into the top surface of the ridge so as to be flush therewith, and then the material is cut into a predetermined length and hardened to form a frame building material.

[0007]

In the formwork building material of the present invention, since the metal fitting that straddles the groove is provided, the tip of the vibrator is prevented from entering the groove. As a result, the tip of the vibrator is prevented from entering the bottom surface of the groove. In addition, since the metal fitting plays the role of an anchor, the bonding force between the concrete that has been cast and hardened and the formwork building material also becomes stronger.

According to the method for manufacturing a formwork building material of the present invention, the U-shaped metal fitting can be easily driven into the material of the formwork building material, and after the material is hardened, the formwork building material and the metal fitting are firmly integrated. Will be

[0009]

EXAMPLE FIG. 1 is a sectional view of a formwork building material 4 according to an example of the present invention. In this embodiment, the U-shaped metal fitting 5 is driven into the top surface 3 a of the ridge 3 so as to straddle the groove 2. The metal fitting 5 is provided so as to be flush with the top surface 3a.

By providing the metal fitting 5, the tip of the vibrator is prevented from entering the recessed line 2 and the binding force between the concrete and the formwork building material 1 is strengthened, as described in the above section.

The mold building material 4 is made of a cement-based extruded building material. As shown in FIG. 3, the metal fitting 5 is extruded immediately after being extruded from the extruder 6 (material of the frame building material) 7. The metal fitting 5 is driven by the roller 8 and is then pushed by the roller 8 until the metal fitting 5 is flush with the ridge top surface 3a. After that, the material 7 is cut into a predetermined length and cured by steam curing, autoclave treatment, etc., to be a mold building material.

In the present invention, the interval between the metal fittings 5 is 5
It is preferably about 8 cm.

[0013]

As described above, according to the formwork building material of the present invention, the workability of placing concrete is improved without being damaged by the contact of the vibrator such as the penetration of holes.

According to the method for manufacturing a formwork building material of the present invention, the formwork building material can be efficiently manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a formwork building material according to an embodiment.

FIG. 2 is a perspective view showing a formwork building material according to an embodiment.

FIG. 3 is a side view showing a method for manufacturing a formwork building material.

FIG. 4 is a perspective view showing a formwork building material according to a conventional example.

[Explanation of symbols]

 1,4 Formwork building material 2 Recessed ridge 3 Convex ridge 5 U-shaped metal fitting 6 Extrusion molding machine 7 Material (extrusion molding material) 8 Roller

Claims (2)

[Claims] 1. A formwork building material which is used as a formwork for concrete pouring, and is left as it is to be a surface material for a concrete pouring face, wherein a plurality of ridges extend in parallel on the back surface, In a formwork building material in which a recess is extended between the protrusions, a U-shaped metal fitting is driven into the top surface of the protrusion so as to straddle the recess between the protrusions. Formwork building material. 2. The method for manufacturing the formwork building material according to claim 1, wherein the material of the formwork building material is extruded by an extrusion molding machine, and the metal fitting is formed into a ridge of the material before the material is cured. Press,
Then, the material is rolled, and the metal fitting is pushed so as to be flush with the top surface of the ridge, after which the material is cut into a predetermined length and cured to form a mold building material. Method of manufacturing frame building materials.