JP2505342Y2 - Concrete formwork - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a concrete formwork, and more particularly to a concrete formwork having a new structure in which a Styrofoam resin plate is used for concrete placing construction.

[0002]

2. Description of the Related Art Conventionally, a formwork made of plywood panels or a formwork made of steel plate panels has been generally used as a erection equipment used during concrete pouring construction. The space between the molds is kept constant and concrete is poured into the concrete foundation or the concrete wall having a predetermined thickness.

In recent years, with the increase in the size and height of buildings, it has been attempted to use a mold made of a styrofoam resin plate material as a concrete mold because it is necessary to reduce the total weight of the erection equipment.

[0004]

However, the plate material of styrofoam resin is insufficient in rigidity of the plate surface as compared with the conventional plywood or form plate panel of the steel plate, and deformation such as bending and warping when placing concrete is caused. Had problems that arise.

The present invention has been made in view of the above problems, and an object thereof is to provide a lightweight concrete foam mold made of styrofoam with little warpage and bending, and after being used as a mold material. The purpose of the present invention is to provide a concrete formwork that can be effectively used as a heat insulating material for buildings.

[0006]

The concrete formwork according to the present invention is made of wood, steel or aluminum having a flat exposed surface on one side within the thickness of a rectangular plate made of expanded polystyrene resin having an appropriate thickness. And the like, or a hard reinforcing strip made of a hard synthetic resin or the like is embedded in the longitudinal direction of the plate material and integrated, and the hard reinforcing strip is used as a mold clamping separator through-mounting structure on the back side of the form. The gist is that the structure is arranged in.

Further, a plurality of the hard reinforcing strips may be arranged and embedded in the width direction of the styrofoam resin plate material. Then, the cross-sectional shape of the groove of the polystyrene foam plate in which the hard reinforcing strip is embedded forms a shallow dovetail-shaped cross section, and the hard reinforcing strip having the same cross-sectional shape as the groove is fitted and removed from the surface side of the plate. It may also be possible to insert and remove from the plate edge.

Furthermore, it is also possible to previously form separator insertion holes for inserting the mold fastening separators at appropriate intervals in the longitudinal direction of the hard reinforcing strip in the widthwise center thereof.

[0009]

The concrete formwork of the present invention is a hard reinforcing strip formed on the back side of a plate made of styrofoam resin, within the plate thickness of the plate material, a metal such as wood, steel or aluminum, or a hard synthetic resin. Since the material is embedded and integrated in the longitudinal direction of the plate material so as to form a flush exposed surface on one surface side, rigidity in the surface direction of the mold is enhanced. As a result, deformation such as bending, twisting, or warping of the mold due to external pressure is reduced, and the mold can be sufficiently used as a concrete mold.

The desired strength can be ensured by increasing or decreasing the number of hard reinforcing strips according to the use conditions and arranging and embedding a plurality of them in the width direction of the expanded polystyrene resin plate material. Further, by preliminarily forming a separator insertion hole through which the mold fastening separator is inserted in the hard reinforcing strip, the assembling work of the mold can be simplified.

Then, the foamed polystyrene resin plate material in which the hard reinforcing strip is embedded has a groove having a shallow dovetail cross-section, and hard reinforcing strips having the same cross-sectional shape as the groove are formed from both sides of the plate. Since it is attached so that it can be fitted and removed, or inserted and removed from the plate end, the hard reinforcing strip can be removed and used as a heat insulating material after use as a formwork.
That is, by preliminarily arranging the hard reinforcing strips at a pitch corresponding to the length between the joists in the installation of the joists supporting the floor material, the floor insulation is cut from the groove position with a cutter knife or the like and placed between the joists. It can be used as a material. If necessary, a cutting position indicating line or a minute projection for indicating a position where the floor insulating material is cut can be integrally formed on the surface of the expanded polystyrene plate material. Further, when it is used as a heat insulating material, it can be diverted as a member such as a ceiling or a wall as well as a floor.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the concrete formwork according to the present invention will be described below with reference to the drawings. Reference numeral 1 is a plate material of styrofoam resin having an appropriate thickness (about 40 mm), which is cut into a rectangular shape having an appropriate width and length depending on the purpose of use.

The plate material 1 is located on the other surface (arrow A) of the surface used as a mold, and within the plate thickness t, metal such as wood, steel or aluminum, or hard synthetic resin or the like. The hard reinforcing strip 2 constituted by is embedded and integrated in the longitudinal direction of the plate 1. The hard reinforcing band member 2 is embedded on the surface side indicated by the arrow A so that the exposed surface portion 3 is flush, and the cross-sectional shape of the fitting groove 4 of the plate member 1 is a gentle slope facing the groove bottom. It has a shallow dovetail-shaped cross section in which the undercut edges 6 and 6 are formed at the groove edges.

The hard reinforcing strip 2 has the same cross sectional shape as the fitting groove 4 of the dovetail cross section, and the undercut edges 6 and 6 are formed.
It forms a structure that does not easily fall off. The hard reinforcing strip 2 is formed so that it can be fitted in or removed from the surface side (arrow C) of the plate material 1, or can be inserted or extracted from the plate end side (arrow D).

Reference numeral 11 in the drawing is a formwork fastening separator, and the ends are inserted and coupled to the separator insertion holes 7 and 7 which are formed in the hard reinforcement strips 2 of both concrete forms 10 and 10 by a drill or the like. Then, the width between the concrete forms 10, 10 is removably regulated to a predetermined dimension by a horseshoe-shaped tightening metal fitting 13 that is placed from the lateral direction of the shaft on the outer surface of the abutment plate 12 that is externally inserted at the end. Become a structure. Further, reference numeral 14 is a circumferential groove for folding and cutting, which is formed at a level that substantially coincides with the inner surface of the plate material 1 of the concrete formwork 10, 10, and the concrete formwork can be broken off from the part. The formwork fastening separator 11 has a structure in which screw parts are formed at both ends of a shaft and nuts are screwed together, or a concrete formwork is held at a predetermined position by engagement with a contact plate 12. It goes without saying that various structures such as the above can be used.

A separator insertion hole 7 for inserting a formwork fastening separator formed in the concrete formwork 10 described above.
Is to be drilled at a work site, for example, while avoiding bar arrangement. As shown in FIG. 4, the separator insertion auxiliary hole 8 of the separator insertion hole 7 is formed in the longitudinal direction of the hard reinforcing strip 2. It is also possible to preliminarily form holes in the widthwise center at appropriate intervals.

FIG. 5 shows an embodiment in which a plurality of the hard reinforcing strips 2 are arranged and embedded in the width direction of the styrofoam plate material 1. The hard reinforcing strips 2, 2 ... According to the use conditions. The desired strength can be obtained by increasing or decreasing the number and arranging and embedding a plurality in the width direction of the plate material 1.

The concrete formwork 10 should be removed from the surface side (arrow C) or the plate end side (arrow D) with respect to the fitting groove 4 in which the hard reinforcing strip 2 forms the shallow dovetail-shaped cross section of the plate 1. Therefore, after use as a mold, the hard reinforcing strip 2 can be removed and the plate 1 can be used as the heat insulating material 1a. A joist 15 for supporting the hard reinforcing strip 2 on the floor material, for example.
By arranging at a pitch corresponding to the length between the joists 15 in the arrangement of No. 1 and cutting from the position of the fitting groove 4 with a cutter knife or the like, as shown in FIG.
It can be used as a floor heat insulating material 1a to be housed between 5 and 15.

[0019]

As described above, in the concrete formwork according to the present invention, the longitudinal direction of the plate material is such that the back side of the plate material made of styrofoam resin has the hard reinforcing band material and the one surface has the flush exposed surface. Since it is embedded integrally in the direction, the rigidity of the mold is enhanced and the deformation of the mold against external pressure is reduced. Moreover, since the number of hard reinforcing strips can be increased or decreased, the strength can be controlled.

Furthermore, since the concrete formwork of the present invention can separate the hard reinforcing strip from the plate, it can be removed as a heat insulating material after use as a formwork. Therefore, the practical effect after implementing the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of the concrete formwork of the present invention.

FIG. 2 is an enlarged sectional view of an essential part showing the construction state.

FIG. 3 is a front view of the same construction state.

FIG. 4 is a partially cutaway perspective view showing a second embodiment of the concrete formwork of the present invention.

FIG. 5 is a partially cutaway perspective view showing still another embodiment of the concrete formwork of the present invention.

FIG. 6 is a cross-sectional view of an essential part showing an example of using the concrete formwork of the present invention as a floor heat insulating material.

[Explanation of symbols]

 1 Plate Material 1a Floor Insulation Material 2 Hard Reinforcing Band Material 4 Fitting Groove 6 Undercut Edge 7 Separator Insertion Hole 8 Separator Insertion Auxiliary Hole 10 Concrete Formwork 11 Formwork Tightening Separator 10 Concrete Formwork 12 Contact Plate 13 Fastening Metal fittings 15 joists

Claims (4)

(57) [Scope of utility model registration request] 1. A rectangular plate material made of styrofoam resin having an appropriate thickness is made of wood, steel, metal such as aluminum or the like, or hard synthetic resin, etc., which has a flush exposed surface on one side. A concrete formwork, characterized in that a hard reinforcement strip is embedded and integrated in the longitudinal direction of the plate material, and the hard reinforcement strip is arranged on the back side of the formwork as a form clamp fastening separator insertion mounting structure. 2. The concrete formwork according to claim 1, wherein a plurality of the hard reinforcing strips are arranged and embedded in a width direction of a styrofoam plate material. 3. A hard reinforcing strip having a groove formed in a foamed polystyrene resin plate in which the hard reinforcing strip is embedded forms a shallow dovetail cross section, and the hard reinforcing strip having the same cross section as the groove is formed on the surface side of the plate. The concrete formwork according to claim 1 or 2, wherein the concrete formwork can be fitted and disengaged from the plate, or can be inserted and withdrawn from the plate end. 4. A separator insertion hole, through which a formwork fastening separator is inserted, is preliminarily formed in the center of the width direction at appropriate intervals in the longitudinal direction of the rigid reinforcing strip. The concrete formwork according to any one of 1 to 3.