JP6960549B1 - P-con substitute structure for formwork - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use a P-con used together with a separator embedded in concrete, a hole or a dent remains in a trace, and the appearance is impaired. A P-con substitute structure that solves this problem will be realized, and the P-con will be eliminated or the diameter will be reduced. SOLUTION: An elastic material or a soft material that buffers between a separator and the outer circumference of a male screw rod penetrating the formwork and concrete is interposed, and the structure has no conventional P-concrete. In addition, in order to reinforce the metal fittings and make it easier to pull out when used in large structures, fill the filled part with a filler instead of the conventional P-con, and penetrate the filled part and the formwork. An elastic material or a soft material that cushions the outer circumference of the male screw rod is interposed so that the structure does not have a conventional P-concrete. [Selection diagram] Fig. 1

Description

The present invention relates to a P-con substitute structure for a concrete formwork.

FIG. 10 is a cross-sectional view showing the entire picture of the conventional separator and the mold, and is the same as FIG. 4 of Patent Document 1 (Practical Registration No. 3169996). It is connected to the separator S embedded in the concrete C by a male screw rod penetrating through the formwork F. The P-con 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 dents remain in the traces, which impairs the appearance.

FIG. 11 shows each type of the conventional separator, in which P-con P is attached to both ends of the separator and is in close contact with 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-con P, but according to the substitute structure of the present invention, traces of removing the P-con P remain at both ends of each separator S in FIG. It is necessary to fill or close the holes and dents in the traces, which is a burden and the labor cost is high.

Practical registration No. 3169996

As described above, in the P-con provided at both ends of the conventional separator, holes and dents of traces of removing the P-con remain on the outer surface of the concrete C, and it is necessary to fill or plug the holes and dents. The burden of expenses is also large. The technical problem of the present invention is that holes and dents remain after the P-con is removed, and it is necessary to fill or plug the holes and dents, and the burden of labor costs is large. According to the P-con substitute structure of the present invention, troublesome and complicated work is not required and can be omitted.
The technical problem of the present invention is to eliminate or reduce the diameter of the P-con that causes holes and dents after removing the P-con as described above, and to solve or reduce the problem caused by the holes and dents.

The technical problem of the present invention is solved by the following means. According to claim 1, a separator embedded in concrete and a male screw rod penetrating the formwork are connected by a tubular nut, and the outer circumference provided integrally with the male screw rod gradually becomes thinner, and a collar having a flat back surface is formed. The collar ring to be held is crimped to the formwork, and the formwork side is interposed with a large-diameter tapered different-diameter elastic material from the separator side that buffers between the outer circumference of the male screw rod and the concrete being cured. It is a characteristic P-con substitute structure.

According to claim 2, a concrete concrete having a diameter opposite to that of the conventional P-con is placed in place of the conventional P-con, and between the placed portion and the outer circumference of the male screw rod penetrating the formwork. The formwork side is interposed with a large-diameter tapered different-diameter cushioning material from the separator side, and the outer circumference provided integrally with the male screw rod gradually becomes thinner, and a collar ring having a flat back surface is formed. It is a P-con substitute structure characterized by being crimped to a mold.

According to claim 3, the end of the separator embedded in concrete on the formwork side is attached to the female threaded portion of the tapered plug integrally connected with the male threaded rod penetrating the formwork, and the outer circumference of the tapered plug is attached. A large-diameter tapered different-diameter cushioning material is interposed on the formwork side from the separator side that cushions the concrete during curing, and the outer periphery of the end of the tapered plug on the formwork side is crimped to the outer surface of the formwork. It is a P-con concrete substitute structure characterized in that the tapered plug is formed in a tapered shape to facilitate removal.

As in claim 1, the separator embedded in the concrete and the male screw rod penetrating the mold are connected by a tubular nut, and the separator side that buffers between the outer circumference of the male screw rod and the concrete being cured. Since the formwork side is intervened with a large-diameter tapered different-diameter elastic material , not only is it easy to pull out the male screw rod, but also the holes and dents of the traces from which the formwork has been removed have a smaller diameter, making it easier to process the traces. .. In addition, the outer circumference provided integrally with the male screw rod gradually becomes thinner, and the brim ring having a brim with a flat back surface is crimped to the formwork, and the concrete surfaces are aligned on one surface, resulting in a beautiful finish.

As in claim 2, a concrete concrete having a diameter opposite to that of the conventional P-con is placed in place of the conventional P-con, and the cast portion and the outer circumference of the male screw rod penetrating the formwork are formed. Since the mold side is interposed with a large-diameter tapered different-diameter cushioning material from the separator side that cushions the space, the male screw rod can be easily separated from the casting portion and pulled out. Moreover, the outer circumference provided integrally with the male screw rod gradually becomes thinner, and the brim ring having a brim with a flat back surface is crimped to the formwork, so that the concrete surfaces are aligned on one surface, resulting in a beautiful finish and easy cleaning. It becomes.

As in claim 3, the end of the separator embedded in concrete on the formwork side is attached to the female threaded portion of the tapered plug that is integrally connected to the male threaded rod that penetrates the formwork, and the tapered plug The formwork side is interposed with a large-diameter tapered different-diameter cushioning material from the separator side that buffers between the outer circumference and the concrete being cured, and the outer circumference of the end portion of the tapered plug on the formwork side is the outer surface of the formwork. There a convex portion to be crimped into, since the tapered plug are interposed elastic material or soft material for cushioning the boundary with ease extraction with tapered, easily withdrawn male screw rod, remaining in trace Since the holes and dents are small, trace processing is easy.

It is a figure which shows the male screw rod with a collar ring by this invention. It is sectional drawing which shows the filling method and the method with a collar ring by this invention. It is a figure which shows the method with a convex part by this invention. This is an example of using a conventional P-con. It is sectional drawing which shows the specific example of the male screw rod with a collar ring. It is sectional drawing which shows the specific example of the male screw rod with a collar ring. It is sectional drawing which shows the specific example of the male screw rod with a collar ring. It is sectional drawing which shows the specific example of the male screw rod with a collar ring. It is sectional drawing which shows the specific example of the method with a convex part. It is an embodiment. It is sectional drawing which shows FIG. It is sectional drawing which shows each kind of the conventional separator.

Next, an embodiment will be described of how the P-con substitute structure according to the present invention is practically embodied. FIG. 1 is a cross-sectional view embodied so that the P-con substitute structure and the structure with a collar ring according to the present invention can be actually understood. In FIG. 1, which shows only one side of the form F, the collar ring 1a is formed integrally with the male screw rod 1 on which the tightening male screw 1c provided at the outer end is formed. The male screw rod 1 penetrates through the mold F and is connected to the separator S by the female screw of the built-in tubular nut 2. The tubular nut 2 is formed with a flange 2b to prevent withdrawal. be.

For reference, it may be related to the brim ring 1a, or the thickness and size of the brim for receiving the formwork should be more than the minimum necessary dimensions in terms of strength. Perform rust treatment (deformed type corresponds to slope / curved formwork). The tubular nut 2 has a round shape and a polygonal shape (the same cross section as the surface is fitted with a brim if necessary) having dimensions necessary for strength. Like the gap 2a in the tubular nut 2, a wall is attached between the screws of the nut part to prevent rust on the separator, if necessary. The thickness and position of the nut collar are free.
The material of the comic book part such as nuts is the most economical material, and chemical products such as metals and synthetic resins and their combinations are used. The length shall be the length required for strength, and the size shall be round or polygonal except for bolts as required for strength. In the case of iron, rust prevention treatment is performed as necessary.

When the inside of the mold F of FIG. 2 is filled with cement during use, the tubular nut 2 remains in the concrete, but since the cushioning material layer 7 is interposed, the male screw rod 1 can be easily removed. .. The male screw rod 1 is separated from the concrete together with the formwork F, but since the collar ring 1a is provided, the surface of the formwork F and the concrete are aligned on one surface.
That is, the male screw 1c at the outer end of the male screw rod 1 is squeezed so that the concrete side surface of the collar ring 1a on which the collar 1a is formed is aligned with the concrete side surface of the formwork F, and the collar 1a is crimped to the material of the formwork. Let me. The tubular nut 2 remains in the concrete even after the formwork F and the male screw rod 1 are removed, and only holes and dents of about 10 mm remain on the concrete surface.

This hole replaces the large-diameter hole after removing the conventional P-con, but the hole formed as a mark of removing the tapered plug 5 in FIG. 3 is as small as about 12 mm. Therefore, the burden of closing the hole or plugging the hole is reduced. An apparatus for carrying out the above 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 that buffers between the tapered plug 5 and the filling area on the outside thereof is interposed so that it can be easily pulled out. There is no conventional large-diameter P-con.

The 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 the formwork has a convex portion 5a at the end on the formwork side and the opposite end. Has a threaded portion 5b, the tip thickness of which is about 1 mm or more. A conventional P Con can be omitted, small holes or depressions only remain in traces, trace processing is simple.

A convex portion 5a and a male screw rod 1 are formed on the outer end of the tapered plug 5 in an integrated extraction type comic book convention 5, and when the male screw 5c at the outer end of the male screw rod 1 is tightened, the convex portion 5a becomes a mold. It is crimped to the material of the frame. As a result, the concrete surface on which the inner surface of the formwork 10F is finished is flat except for the hole of about 12 mm, which is smaller than 30 mm at the time of P-con, and a beautiful finish is obtained on one surface. The formwork crimping portion for crimping the convex portion 5a has a concave adhesive surface.
When the male screw portion at the outer end of the male screw rod penetrating through the mold F of FIG. 3 is tightened, it is connected to the separator S. Therefore, the structure is such that the separator S embedded in the concrete and the nut portion at the inner end of the male screw rod portion penetrating the mold F are integrally connected. Since the end of the nut on the formwork side is a convex portion 5a and is crimped to the material of the formwork, the formwork F is disassembled after the concrete has been cured and the concrete surface has dried. After removal, one side becomes a beautiful concrete surface.

5 to 8 are diagrams showing specific examples of the collar ring type. 4 to 9 are examples showing an example in which the formwork F and F on both sides are used. FIG. 6 is a diagram showing an example in which the filling structure of FIG. 2 is used for both the left and right frames. FIG. 7 shows an example in which one side and the other side are angled by about 60 degrees. FIG. 8 shows an example in which a separator and a direct nut (female screw) are integrated into a single body to provide a flat shape of the rotation prevention mechanism. FIG. 9 is an example in which the convex portion and the filler structure as shown in FIG. 3 are symmetrically provided on both the left and right sides. FIG. 9 is an example of the integrated comic book of FIG.

As described above, the separator embedded in the concrete and the male screw rod penetrating the formwork are connected by a tubular nut, and the flange ring provided integrally with the male screw rod is crimped to the formwork, and the male screw rod is crimped to the formwork. Since an elastic material is interposed between the outer circumference of the concrete and the concrete being cured, the holes and dents of the traces from which the male screw rod is removed together with the formwork have a small diameter, which facilitates and reduces the trace treatment. Further, the collar ring integrally provided with the male screw rod is press-fitted into the material of the formwork, and the concrete surfaces are aligned on one surface, resulting in a beautiful finish.

Explanation of symbols 1. Male screw rod 1a. Tsuba ring 1b. Knob for extraction 1c. Male screw part with slightly thicker formwork side 1d. Knob for removing nut-embedded comvault formwork, etc. 2. Cylindrical nut (female screw)
2a. Nut embedded type Comic book nut partition wall 2b. Flange 3. State of holes after extraction of bolts, etc. 4. Nut-embedded comic book + concrete concrete 5. Pull-out type Comic book taper stopper 5a. The formwork adhesive surface has a recess for crimping. Female threaded part (Pull-out type comic book with a tip thickness of 1 mm or more)
5c. Knob for pull-out type Comic book for hexagon socket wrench 5d. Knob for removing the pull-out type Comic book formwork P. Standard type P-con that is widely used now. Cushioning material for bolt removal S. Separator Sa. Diagonal formwork separator Sb. Embedded nut integrated separator C.I. Concrete casting part F. Formwork part.
T. Form Thai (registered trademark)

Claims (3)

A separator embedded in concrete and a male screw rod penetrating through the formwork are connected by a tubular nut, and the outer circumference provided integrally with the male screw rod gradually becomes thinner, and a collar ring with a flat back surface is used as a mold. A P-concrete that is crimped to the frame and has a large-diameter tapered different-diameter elastic material interposed on the mold side from the separator side that buffers between the outer circumference of the male screw rod and the concrete being cured. Substitute structure. A concrete concrete with a diameter opposite to that of the conventional P-con is placed in place of the conventional P-con, and the separator side that cushions the space between this casting part and the outer circumference of the male screw rod that penetrates the formwork. A large-diameter tapered different-diameter cushioning material is interposed on the mold side, and the outer circumference provided integrally with the male screw rod gradually becomes thinner, and a collar ring having a flat back surface is crimped to the mold. P-con substitute structure characterized by the fact that. 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 circumference of this tapered plug and the concrete being cured A large-diameter tapered different-diameter cushioning material is interposed on the mold side from the separator side to buffer the space between them, and the outer periphery of the end portion of the tapered plug on the mold side is used as a convex portion to be crimped to the outer surface of the mold. There, P Con substitute structure, characterized in that the tapered plug was easily withdrawn to tapered.

Images