JP2022158101A - Substitution structure of plastic cone for formwork - Google Patents

Abstract

To remove a plastic cone or reduce a diameter of a plastic cone by realizing a substitution structure of a plastic cone solving a problem that, when a plastic cone used together with a separator embedded in concrete is used, a hole or a recess is left in a mark and an appearance is inhibited.SOLUTION: In a substitution structure of a plastic cone without a conventional plastic cone, an elastic material or a soft material buffering between a separator and an outer periphery of a male screw rod penetrating a formwork, and concrete is interposed. In a substitution structure of a plastic cone without a conventional plastic cone, a reverse-shaped concrete cone or the like is used instead of conventional plastic cone for reinforcement and easy puling-out of a metal fitting when used in a large construction, a filler is filled, and an elastic material or a soft material buffering between the filling portion and an outer periphery of a male screw rod penetrating a formwork is interposed.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a concrete formwork substituting structure.

FIG. 10 is a cross-sectional view showing the entirety of a conventional separator and mold, which is the same as FIG. 4 of Patent Document 1 (Practical Registration No. 3169976). The separator S embedded in the concrete C is connected to the formwork 10 by a male threaded rod penetrating through the formwork 10 . The P concrete P is finally removed from the concrete C. T is the Form Tie® portion. Since the P-con P is finally removed in this way, holes and depressions are left behind, which impair the appearance.

FIG. 11 shows various kinds of conventional separators, and P-con P is attached to both ends of the separator and adheres to the outer surface of the mold, but the P-con is finally removed as described above. Holes and dents remain on the surface of the concrete C after removing the P concrete P, but according to the substitute structure of the present invention, traces of removing the P concrete P remain on both ends of each separator S in FIG. It is necessary to fill or block the holes and dents of the mark, and the work is burdensome, and the labor cost is also large.

Practical Registration No. 3169976

As described above, with the pre-container provided at both ends of the conventional separator, holes and dents remain on the outer surface of the concrete C after removing the pre-concrete, and it is necessary to fill or plug these holes and dents. The burden of expenses is also large. A technical problem of the present invention is that holes and depressions remain after removing the P-con, and it is necessary to fill or plug these holes and depressions, and the burden of labor costs is also large. According to the P capacitor substitute structure of the present invention, troublesome and complicated work is not required and can be omitted.
A technical object of the present invention is to eliminate or reduce the diameter of the P cone that causes the holes and dents after removal of the P cone as described above, thereby eliminating or reducing the problems caused by the holes and dents.

The technical problems of the present invention are solved by the following means. In claim 1, a separator embedded in concrete and a male threaded rod penetrating through the formwork are connected by a cylindrical nut, a collar ring provided integrally with the male threaded rod is crimped to the formwork, and the male threaded rod This is a substitute structure for P concrete, characterized in that an elastic material is interposed to buffer between the outer circumference of the concrete and the concrete being cured, and there is no conventional P concrete.

Claim 2 has the same structure as claim 1 for metal fittings, etc., but in order to reinforce the metal fittings and make them easier to remove when used in large structures, etc. Filled with an agent, an elastic material or soft material is interposed between the filled part and the outer circumference of the male threaded rod penetrating through the mold, which is not found in the conventional P concrete. It is a concrete substitute structure.

In claim 3, the end of the separator embedded in the concrete on the formwork side is attached to the female threaded part of the tapered plug integrally connected to the male threaded rod penetrating the formwork, and the outer circumference of the tapered plug and the This substitute structure is characterized in that an elastic material or a soft material is interposed to cushion the gap between it and the concrete being cured, and is characterized in that it is not found in the conventional P concrete that has a small diameter and is easy to extract.

As in claim 1, the separator embedded in the concrete and the male threaded rod passing through the formwork are connected by a cylindrical nut, and the collar ring provided integrally with the male threaded rod is crimped to the formwork. By interposing an elastic material that buffers between the outer circumference of the male threaded rod and the concrete being cured, the diameter of the holes and depressions left by the removal of both the male threaded rod and the formwork becomes small, facilitating the disposal of the remains. In addition, the flange ring provided integrally with the male threaded rod is crimped into the material of the formwork, so that the concrete surface is even and beautiful finish is obtained.

As in claim 2, a filler is filled instead of the conventional P concrete, and an elastic material or soft material is interposed to buffer between the filled portion and the outer circumference of the male threaded rod that penetrates the mold. As such, the male threaded rod can be easily pulled out and separated from the filling portion. Therefore, as in paragraph number (0009), the concrete surface is evenly finished, and cleanup is easy.

As in claim 3, the end of the separator embedded in the concrete on the formwork side is attached to the female threaded part of the tapered plug that is integrally connected to the male threaded rod penetrating the formwork. An elastic material or soft material is interposed to buffer between the outer circumference and the concrete being cured. it gets easier.

It is a figure which shows the external thread rod with a collar ring by this invention. It is sectional drawing which shows the filling method by this invention, and the method of attaching a collar ring. FIG. 4 is a diagram showing a method of forming a convex portion according to the present invention; This is an example of using a conventional P-con. FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; It is sectional drawing which shows the specific example of the method of attaching a convex part. It is an example. FIG. 4 is a cross-sectional view showing FIG. 4 of Patent Document 1 (Utility Model Registration No. 3169976) (entire aspect of the separator and the mold). It is a cross-sectional view showing each type of conventional separator.

Next, an embodiment of how the P capacitor substituting structure according to the present invention is practically embodied will be described. FIG. 1 is a cross-sectional view of a structure substituting a P-conc and a structure with a flange ring according to the present invention so as to actually understand them. In FIG. 1 showing only one side of the formwork F, a flange ring 1a is integrally formed with a male threaded rod 1 having an external tightening screw 1c formed at its outer end. This male-threaded rod 1 passes through the mold F and is connected to the separator S by the internal thread of a cylindrical nut 2 incorporated therein. be.

For reference, the thickness and size of the brim for receiving the formwork should be at least the minimum required strength, round or polygonal, and in the case of iron, if necessary. Rust treatment is performed (a modified type is available for sloped and curved formwork). The tubular nut 2 has a circular or polygonal shape (having the same cross section as the surface, with a flange attached if necessary) with dimensions necessary for strength. Like the gap 2a in the cylindrical nut 2, a wall is installed between the threads of the nut portion to prevent the separator from rusting, if necessary. In addition, the thickness and position of the flange of the nut are free.
Comicon parts such as nuts should be made of the most economical materials such as chemical products such as metals and synthetic resins, or combinations thereof. The length should be as long as required for strength, and the size should be round or polygonal, except for bolts, as required for strength. In the case of iron, rust prevention treatment is performed as necessary.

In use, when the inside of the formwork F of FIG. 2 is filled with cement, the cylindrical nut 2 remains in the concrete, but the externally threaded rod 1 can be easily removed because the cushioning material 7 is interposed. The externally threaded rod 1 is separated from the concrete together with the formwork F, but since there is the flange ring 1a, the formwork F and the surface of the concrete are flush with each other.
That is, the male screw 1c at the outer end of the male threaded rod 1 is tightened so that the concrete side surface of the flange ring 1a having the flange 1a formed thereon is aligned with the concrete side surface of the formwork F, and the flange 1a is crimped to the material of the formwork. Let The cylindrical nut 2 remains in the concrete even after the formwork F and the male threaded rod 1 are removed, leaving only a hole or depression of about 10 mm on the concrete surface.

This hole replaces the large-diameter hole after removing the conventional P-con, but the hole left after removing the tapered plug 5 in FIG. 3 is a small hole of about 12 mm. Therefore, the burden of plugging or plugging the hole is reduced. An apparatus for carrying out the method is shown in FIG. Instead of the P cone portion, the filling portion 5 is filled, and a soft material of the elastic material 7 is interposed between the filling portion 5 and the tapered plug to facilitate extraction, so that the conventional large diameter plug can be easily pulled out. There is no P-con of

A substitute structure having a tapered plug on the female threaded portion 5b of the tapered plug 5 integrally connected to the male threaded rod penetrating through the mold has a convex portion 5a at the end on the mold side and is attached. be. The tip thickness of the female screw portion 5b is about 1 mm or more. In order to easily remove the tapered plug 5, an elastic material is interposed between the outer periphery and the filling portion for buffering by inserting a cushioning material such as rubber or synthetic resin of the elastic material 7, so that the conventional P The cone can be omitted, the holes and dents left behind are small, and the traces are easy to remove.

A convex portion 5a and a male threaded rod 1 are formed on the outer end of a tapered plug 5 to form an integral pull-out type comic connector 5. When a male screw 5c on the outer end of the male threaded rod 1 is tightened, the convex portion 5a is removed from the mold. It is crimped to the material of the frame. As a result, the finished concrete surface of the formwork 10 becomes flat except for holes of about 12 mm, which are smaller than 30 mm in the case of the P-concrete. In addition, the mold crimping portion for crimping the convex portion 5a has a concave bonding surface.
The male threaded rod at the outer end of the male threaded rod passing through the mold F in FIG. Therefore, the separator S embedded in the concrete and the nut portion at the inner end of the male threaded rod penetrating through the formwork F are integrally connected to each other. Since the end of the nut portion on the side of the formwork forms a convex portion 5a and is crimped to the material of the formwork, the formwork F is dismantled after curing of the concrete and drying of the concrete surface. After removal, one side becomes a clean concrete surface.

5 to 8 are diagrams showing specific examples of the ring-shaped collar. 4 to 9 are examples showing examples of using the formwork F, F on both sides. FIG. 6 is a diagram showing an example in which the filling structure of FIG. 2 is used for both left and right frames. FIG. 7 shows an example in which one side and the other are angled at about 60 degrees. FIG. 8 shows an example in which the separator and the direct nut (female thread) are integrated into a flat shape anti-rotation mechanism. FIG. 9 shows an example in which convex portions and filler structures as shown in FIG. 3 are provided symmetrically on both left and right sides. FIG. 9 is an example of an open type cone of FIG.

As described above, the separator embedded in the concrete and the male threaded rod passing through the formwork are connected by a cylindrical nut, the flange ring provided integrally with the male threaded rod is crimped to the formwork, and the male threaded rod Since an elastic material is interposed to buffer between the outer circumference of the mold and the concrete being cured, holes and dents left behind by removing the male threaded rod together with the formwork have a small diameter, facilitating and reducing the removal of the leftover marks. Also, the collar ring integrally connected with the male threaded rod is press-fitted into the material of the formwork, so that the concrete surface is even and beautiful finish is obtained.

Description of symbols 1. Male threaded rod 1a. collar ring 1b. Pulling out knob 1c. Male screw part with slightly thicker mold side 1d. Cylindrical nut (internal thread)
2a. Nut-embedded Comicon nut partition wall 2b. flange 3 . 3. Condition of holes after removal of bolts, etc. Nut-embedded Comic Con + Concrete Con 5. Removable Comic Con tapered plug 5a. The bonding surface of the formwork is a pull-out type Comicon with a dent for crimping 5b. Internal thread (Extraction type Comic Con with a thickness of 1 mm or more at the tip)
5c. Hexagonal socket wrench pull-out type comic-con knob 5d. Buffer material for bolt removal S.P. Separator Sa. Diagonal formwork separator Sb. embedded nut integrated separator C. Concrete placement part F. Formwork part.
T. Form Tie (Registered Trademark)

TECHNICAL FIELD The present invention relates to a concrete formwork substituting structure.

FIG. 10 is a cross-sectional view showing the entirety of a conventional separator and mold, which is the same as FIG. 4 of Patent Document 1 (Practical Registration No. 3169976). The separator S embedded in the concrete C is connected to the formwork F by a male threaded rod passing through. The P concrete P is finally removed from the concrete C. T is the Form Tie® portion. Since the P-con P is finally removed in this way, holes and depressions are left behind, which impair the appearance.

FIG. 11 shows various kinds of conventional separators, and P-con P is attached to both ends of the separator and adheres to the outer surface of the mold, but the P-con is finally removed as described above. Holes and dents remain on the surface of the concrete C after removing the P concrete P, but according to the substitute structure of the present invention, traces of removing the P concrete P remain on both ends of each separator S in FIG. It is necessary to fill or block the holes and dents of the mark, and the work is burdensome, and the labor cost is also large.

Practical Registration No. 3169976

As described above, with the pre-container provided at both ends of the conventional separator, holes and dents remain on the outer surface of the concrete C after removing the pre-concrete, and it is necessary to fill or plug these holes and dents. The burden of expenses is also large. A technical problem of the present invention is that holes and depressions remain after removing the P-con, and it is necessary to fill or plug these holes and depressions, and the burden of labor costs is also large. According to the P capacitor substitute structure of the present invention, troublesome and complicated work is not required and can be omitted.
A technical object of the present invention is to eliminate or reduce the diameter of the P cone that causes the holes and dents after removal of the P cone as described above, thereby eliminating or reducing the problems caused by the holes and dents.

The technical problems of the present invention are solved by the following means. In claim 1, a separator embedded in concrete and a male-threaded rod penetrating through the formwork are connected by a cylindrical nut, and a brim provided integrally with the male-threaded rod has a gradually thinned outer periphery and a flat back surface. The collar ring is crimped to the formwork, and a tapered elastic material with a different diameter is interposed on the formwork side from the separator side for buffering between the outer periphery of the male threaded rod and the concrete being cured. It is a P capacitor substitute structure characterized by this.

In claim 2, a concrete concrete having a diameter opposite to that of the conventional P concrete is placed instead of the conventional P concrete , and a separator side buffers between this placed part and the outer circumference of the male threaded rod. A tapered different-diameter cushioning material having a larger diameter is interposed on the formwork side , and a collar ring provided integrally with the male threaded rod gradually becomes thinner toward the outer circumference and has a flat backed collar, and is crimped to the formwork. The P capacitor substitute structure is characterized by:

In claim 3, the end of the separator embedded in the concrete on the formwork side is attached to the female threaded part of a tapered plug that is integrally connected to the male threaded rod penetrating the formwork, and the outer periphery of the tapered plug and the A tapered different-diameter cushioning material having a larger diameter on the formwork side than the separator side for buffering between the concrete being cured is interposed, and the outer periphery of the end of the taper plug on the formwork side is crimped to the outer surface of the formwork. and the tapered plug is tapered to facilitate extraction.

As in claim 1, the separator embedded in the concrete and the male threaded rod penetrating the mold are connected by a cylindrical nut, and the separator side buffers between the outer circumference of the male threaded rod and the concrete being cured. Since a tapered elastic member with a larger diameter is interposed on the formwork side , not only is it easy to pull out the male threaded rod, but also the holes and dents left by the removal of the formwork together become small in diameter, facilitating the removal of the traces. . In addition, the outer peripheral portion provided integrally with the male threaded rod gradually becomes thinner, and a brim ring having a brim with a flat back is crimped to the formwork, so that the concrete surface is even and beautiful finish is achieved.

As in claim 2, a concrete concrete having a diameter opposite to that of the conventional P concrete is placed instead of the conventional P concrete, and a buffer is provided between this placed portion and the outer circumference of the male threaded rod. Since the taper-shaped different-diameter cushioning material having a larger diameter is interposed on the mold side than on the separator side , the male threaded rod can be easily separated from the driving portion and pulled out. In addition, since the outer peripheral portion provided integrally with the male threaded rod gradually becomes thinner, and the brim ring having a brim with a flat back is crimped to the formwork, the concrete surface is even, beautiful finish, and easy to clean up afterward. becomes.

As in claim 3, the end of the separator embedded in the concrete on the formwork side is attached to the female threaded part of the tapered plug that is integrally connected to the male threaded rod penetrating the formwork. A tapered different-diameter cushioning material having a larger diameter on the formwork side than the separator side for buffering between the outer circumference and the concrete being cured is interposed, and the outer circumference of the end of the taper plug on the formwork side is placed on the outer surface of the formwork. The tapered plug is formed in a tapered shape to facilitate removal, and an elastic or soft material is interposed to cushion the boundary, making it easy to remove the male threaded rod and leaving a trace. Since the holes and dents are also small, it is easy to clean the traces.

It is a figure which shows the external thread rod with a collar ring by this invention. It is sectional drawing which shows the filling method by this invention, and the method of attaching a collar ring. FIG. 4 is a diagram showing a method of forming a convex portion according to the present invention; This is an example of using a conventional P-con. FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; FIG. 3 is a cross-sectional view showing a specific example of a male threaded rod with a flange ring; It is sectional drawing which shows the specific example of the method of attaching a convex part. It is an example. FIG. 4 is a cross-sectional view showing FIG. 4 of Patent Document 1 (Utility Model Registration No. 3169976) (entire aspect of the separator and the mold). It is a cross-sectional view showing each type of conventional separator.

Next, an embodiment of how the P capacitor substituting structure according to the present invention is practically embodied will be described. FIG. 1 is a cross-sectional view of a structure substituting a P-conc and a structure with a flange ring according to the present invention so as to actually understand them. In FIG. 1 showing only one side of the formwork F, a flange ring 1a is integrally formed with a male threaded rod 1 having an external tightening screw 1c formed at its outer end. This male-threaded rod 1 passes through the mold F and is connected to the separator S by the internal thread of a cylindrical nut 2 incorporated therein. be.

For reference, the thickness and size of the brim for receiving the formwork should be at least the minimum required strength, round or polygonal, and in the case of iron, if necessary. Rust treatment is performed (a modified type is available for sloped and curved formwork). The tubular nut 2 has a circular or polygonal shape (having the same cross section as the surface, with a flange attached if necessary) with dimensions necessary for strength. Like the gap 2a in the cylindrical nut 2, a wall is installed between the threads of the nut portion to prevent the separator from rusting, if necessary. In addition, the thickness and position of the flange of the nut are free.
Comicon parts such as nuts should be made of the most economical materials such as chemical products such as metals and synthetic resins, or combinations thereof. The length should be as long as required for strength, and the size should be round or polygonal, except for bolts, as required for strength. In the case of iron, rust prevention treatment is performed as necessary.

In use, when the inside of the formwork F of FIG. 2 is filled with cement, the cylindrical nut 2 remains in the concrete, but the externally threaded rod 1 can be easily removed because the cushioning material layer 7 is interposed. . The externally threaded rod 1 is separated from the concrete together with the formwork F, but since there is the flange ring 1a, the formwork F and the surface of the concrete are flush with each other.
That is, the male screw 1c at the outer end of the male threaded rod 1 is tightened so that the concrete side surface of the flange ring 1a having the flange 1a formed thereon is aligned with the concrete side surface of the formwork F, and the flange 1a is crimped to the material of the formwork. Let The cylindrical nut 2 remains in the concrete even after the formwork F and the male threaded rod 1 are removed, leaving only a hole or depression of about 10 mm on the concrete surface.

This hole replaces the large-diameter hole after removing the conventional P-con, but the hole left after removing the tapered plug 5 in FIG. 3 is a small hole of about 12 mm. Therefore, the burden of plugging or plugging the hole is reduced. An apparatus for carrying out the method is shown in FIG. A tapered plug 5 is formed in place of the P-con portion, and a soft material of the elastic material layer 7 is interposed between the tapered plug 5 and the filling area on the outer side of the tapered plug 5 to facilitate extraction. There are no conventional large-diameter P-cons.

A substitute structure in which the separator S is connected to the female threaded portion 5b of the tapered plug 5 integrally connected to the male threaded rod penetrating through the mold has a convex portion 5a at the end on the mold side and the opposite end. has a threaded portion 5b, and the tip thickness thereof is about 1 mm or more. In order to easily remove the tapered plug 5, an elastic material is interposed between the outer periphery and the filling portion for buffering by inserting a cushioning material such as rubber or synthetic resin of the elastic material 7, so that the conventional P The cone can be omitted, leaving only small holes and dents, and the traces can be easily removed.

A convex portion 5a and a male threaded rod 1 are formed on the outer end of a tapered plug 5 to form an integral pull-out type comic connector 5. When a male screw 5c on the outer end of the male threaded rod 1 is tightened, the convex portion 5a is removed from the mold. It is crimped to the material of the frame. As a result, the finished concrete surface of the formwork 10F becomes flat except for the holes of about 12 mm, which are smaller than 30 mm in the case of the P-concrete, resulting in a uniform and beautiful finish. In addition, the mold crimping portion for crimping the convex portion 5a has a concave bonding surface.
The male threaded rod at the outer end of the male threaded rod passing through the mold F in FIG. Therefore, the separator S embedded in the concrete and the nut portion at the inner end of the male threaded rod penetrating through the formwork F are integrally connected to each other. Since the end of the nut portion on the side of the formwork forms a convex portion 5a and is crimped to the material of the formwork, the formwork F is dismantled after curing of the concrete and drying of the concrete surface. After removal, one side becomes a clean concrete surface.

5 to 8 are diagrams showing specific examples of the ring-shaped collar. 4 to 9 are examples showing examples of using the formwork F, F on both sides. FIG. 6 is a diagram showing an example in which the filling structure of FIG. 2 is used for both left and right frames. FIG. 7 shows an example in which one side and the other are angled at about 60 degrees. FIG. 8 shows an example in which the separator and the direct nut (female thread) are integrated into a flat shape anti-rotation mechanism. FIG. 9 shows an example in which convex portions and filler structures as shown in FIG. 3 are provided symmetrically on both left and right sides. FIG. 9 is an example of the integrated comic-con shown in FIG.

As described above, the separator embedded in the concrete and the male threaded rod passing through the formwork are connected by a cylindrical nut, the flange ring provided integrally with the male threaded rod is crimped to the formwork, and the male threaded rod Since an elastic material is interposed to buffer between the outer circumference of the mold and the concrete being cured, holes and dents left behind by removing the male threaded rod together with the formwork have a small diameter, facilitating and reducing the removal of the leftover marks. Also, the collar ring integrally connected with the male threaded rod is press-fitted into the material of the formwork, so that the concrete surface is even and beautiful finish is obtained.

Description of symbols 1. Male threaded rod 1a. collar ring 1b. Pulling out knob 1c. Male screw part with slightly thicker mold side 1d. Cylindrical nut (internal thread)
2a. Nut-embedded Comicon nut partition wall 2b. flange 3 . 3. Condition of holes after removal of bolts, etc. Nut-embedded Comic Con + Concrete Con 5. Removable Comic Con tapered plug 5a. The bonding surface of the formwork is a removable type Comicon with a dent for crimping 5b. Internal thread (Extraction type Comic Con with a thickness of 1 mm or more at the tip)
5c. Hexagonal socket wrench pull-out type comic-con knob 5d. Buffer material for bolt removal S.T. Separator Sa. Separator for oblique formwork Sb. embedded nut integrated separator C. Concrete placement part F. Formwork part.
T. Form Tie (Registered Trademark)

In claim 2, a concrete concrete having a diameter opposite to that of the conventional concrete is placed instead of the conventional concrete, and between this placed part and the outer circumference of the male threaded rod penetrating through the formwork. A tapered different-diameter cushioning material having a larger diameter on the formwork side than the separator side for buffering is interposed, and the outer peripheral side provided integrally with the male threaded rod gradually becomes thinner, and the back is flat. It is a P-con substitute structure characterized by being crimped to a formwork.

As in claim 2, a concrete concrete having a diameter opposite to that of the conventional P concrete is placed instead of the conventional P concrete, and this placed portion and the outer circumference of the male threaded rod penetrating through the formwork. Since a tapered different-diameter cushioning material having a larger diameter on the formwork side than on the separator side for cushioning the gap is interposed, the male threaded rod can be easily separated from the driving portion and pulled out. In addition, since the outer peripheral portion provided integrally with the male threaded rod gradually becomes thinner, and the brim ring having a brim with a flat back is crimped to the formwork, the concrete surface is even, beautiful finish, and easy to clean up afterward. becomes.

Claims (3)

A separator embedded in the concrete and a male threaded rod penetrating through the formwork are connected by a cylindrical nut, and a collar ring provided integrally with the male threaded rod is crimped to the formwork and is cured with the outer circumference of the male threaded rod. A structure substituting for concrete, characterized in that an elastic material is interposed for buffering between the concrete and the concrete, and there is no conventional concrete. In order to reinforce metal fittings and make them easier to remove when used in a large structure, an inverted concrete concrete is filled with a filler instead of the conventional P concrete, and the space between this filled part and the outer circumference of the male threaded rod is filled. 2. A substitute structure for plastic concrete according to claim 1, wherein an elastic material for cushioning is interposed and no conventional plastic concrete is used. The end of the separator embedded in the concrete on the formwork side is attached to the female threaded part of the tapered plug that is integrally connected to the male threaded rod that penetrates the formwork, and the outer periphery of this taper plug and the concrete being cured are attached. A substituting structure for a P-cone, characterized in that an elastic material is interposed to cushion the gap between them, and a conventional P-cone that is small in diameter and easy to pull out does not have.

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