JPH0776488B2 - Manufacturing method and mold for embedded cement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method for manufacturing an embedded cement and a molding die,
More specifically, when constructing a formwork for placing concrete, it is embedded in a structure such as a binding tool that tightly connects the formworks facing each other at a predetermined interval, or a concrete wall formed by casting. The present invention relates to a method and a mold for manufacturing an embedded component used for a scaffolding insert or the like used for connecting a wall joint that connects a structure and a work scaffold.

<Prior Art> Conventionally, in pouring concrete, as shown in FIG. 4, for example, a circular separator (2) is provided between molds (1) (1).
And a fastener (3) (3) connected to both ends of the fastener (3) (3) to regulate the interval between the molds (1) (1) and to connect to the embedded controller (3) (3). Via HomeThai (registered trademark) (4) (1)
(1) is immovably supported, and concrete is poured between a pair of molds (1) (1) that are separated by a predetermined distance and face each other.

A block body (4a) made of concrete or mortar is provided as the embedded concrete (3) for connecting the round separator (2) and the home tie (4). In this case, the block body (4a) is provided. And the concrete matrix are well adhered to each other, and water leakage to the inside can be effectively prevented. A joint nut (4b) that is screwed into the round separator (2) and the home tie (4) is embedded in one end surface of the block body (4a), and the home tie (4) is in the other end surface.
The introduction hole (5) for introducing the is provided coaxially.

As a method of manufacturing such an embedded molding, casting molding is performed using a molding die made of foam, and the joint nut is embedded at the same time as the casting molding or is fitted after the casting molding. Is generally adopted (Japanese Utility Model Laid-Open No. 62-118844, Japanese Utility Model Laid-Open No. 62-173449,
See Japanese Utility Model Publication No. 63-12555).

<Problems to be Solved by the Invention> However, in the above-mentioned conventional method for manufacturing an embedded concrete, since concrete or mortar having a viscosity is simply poured into the mold recess, the concrete or mortar goes to every corner of the mold recess. There is a risk that a considerable amount of gap may be formed between the mold recess and the block body because the mold cannot be passed. In addition, the density of the molded product decreases, the corners and edges of the block cannot be strengthened, and remains brittle, and the corners and edges are easily chipped due to impact during transportation. This will easily form irregularities and defects on the peripheral surface of the block body, which will deteriorate the adhesion of the block body to the concrete matrix and allow the boundary between the block body and the concrete wall to reach inside the concrete wall. The inconvenience of allowing rainwater to enter and corroding the reinforcing bars inside the concrete occurs.

The present invention has been made in view of the above problems, and improves the adhesion to the concrete matrix by preventing the molding failure of the block body, and a method for manufacturing an embedded concrete that effectively prevents water leakage to the inside, An object of the present invention is to provide a molding die that is preferably used in the method for manufacturing the embedded cement.

<Means for Solving the Problems> As a method for manufacturing an embedded concrete according to the invention of claim 1 for achieving the above object, a joint nut is embedded in one end surface on the large diameter side of a tapered block body made of concrete or mortar. In the method for manufacturing an embedded container in which the introduction hole for the fastener to be coupled to the joint nut is formed on the other end surface, in the method for manufacturing the embedded concrete, after the joint nut is installed on the receiving plate, a molding part that forms a mold cavity around the joint nut. While setting the molding die on the receiving plate so as to surround with, while introducing the rod for forming the introduction hole into the cavity of the same mold and closing the hollow part of the joint nut with the tip of the rod, concrete or mortar in the molding part. It is characterized in that it is filled and sealed, and concrete or mortar is pressed and solidified by a pressing mold from above. As a mold for the embedded concrete according to the invention of claim 2, a joint nut is embedded in one end face of the tapered block body made of concrete or mortar on the large-diameter side, and the other end face of the fastener is connected to the joint nut. In a mold for molding an embedded container having an introduction hole formed therein, a mold body that forms a mold cavity for molding the outer periphery of the block body is formed, and both ends corresponding to both end surfaces of the block body are open. And a receiving plate that is releasably joined to one end of the mold body and has a surface corresponding to one end of the block body, and a joint nut is set on the surface, and the receiving plate is opposite to the forming part. A rod that is introduced from the side and closes the hollow part of the joint nut at the tip, and the rod is fitted and inserted to close the other end of the mold body together with the rod, and in the axial direction of the rod. And it is characterized in that it comprises in that it comprises a pressure type for applying a dynamic and predetermined pressure to the concrete or mortar is filled into a mold fossa with.

<Operation> According to the method for manufacturing an embedded concrete according to the first aspect of the present invention, a joint nut is embedded in one end surface of the embedded concrete by using a receiving plate, and concrete or mortar flows into the joint nut through an introduction hole. A block body made of concrete or mortar in which a rod for forming is prevented by being introduced into the molding portion, and an introducing hole for a fastener to be coupled to the joint nut is coaxially formed on the other end surface of the embedded concrete by the rod of the same. On the other hand, the concrete or mortar filled in the mold cavity is pressurized to a predetermined pressure so as to be solidified, so that the concrete or mortar is resistant to the viscosity of the concrete or mortar. You can force it to reach every corner,
It is possible to prevent a gap from being formed between the inner peripheral surface of the mold cavity and the inner peripheral surface. Further, the density of the molded product can be increased to make the corners and edges of the block body firm.

Further, according to the molding tool of the embedded container of the invention of claim 2, a joint nut is mounted on one end side of the block body by using a receiving plate, and is joined to the joint nut by a rod on the other end side. Since the introduction hole can be formed coaxially and a predetermined pressure can be applied to the concrete or mortar filled in the mold cavity by the pressure mold, in the method for producing an embedded concrete according to the invention of claim 1, The required molding can be reliably performed.

<Embodiment> An embodiment will be described in detail below with reference to the accompanying drawings. FIG. 1 is a process diagram showing a method for manufacturing an embedded capacitor (30) according to the present invention, which is carried out using a molding die (10) suitable for this manufacturing method. It should be noted that the same reference numerals are used for the elements common to those of the reference numerals shown in FIG. First, for convenience of description, an outline of the embedded controller (30) will be described.

As can be seen from FIG. 2, the embedded capacitor (30) has a tapered block body (31) having a stepped portion (35) formed at a predetermined position around the peripheral surface thereof and one end surface of the block (31). It is composed of an embedded joint nut (32) and the joint nut (32) is attached to the other end surface of the block body (31).
A home tie introduction hole (33) having a predetermined length and communicating with is formed.

More specifically, the block body (31) is integrally formed by using concrete or mortar similar to the concrete matrix to be constructed as a material, and the entire shape thereof is formed into a truncated cone. As suitable for use in the mode shown in FIG. 3, the small diameter portion is configured as the contact surface (31a) with respect to the mold (1), and the large diameter portion has the introduction side end surface of the round separator (2) ( 31b). The step portion (35) is formed so as to face the mold (1) when the block body (31) is used in the mode shown in FIG. 3, and the mold (1) is After being removed, rainwater is prevented from entering the inside of the concrete wall from the boundary of the concrete wall by the steps facing each other, and effectively prevents the corrosion of the reinforcing bars inside the concrete. Further, the block body (31) is securely fixed in the concrete wall so that the block body (31) does not fall out of the concrete wall.
The joint nut (32) is integrated with the block body (31) in a state where the flange portion (32a) is embedded in the end surface (31b) of the block body (31). Although the block body (31) has a circular cross section, it is also possible to employ a block body having a rectangular cross section or other shapes.

In FIG. 1, a molding die (10) is for molding by clamping the above-mentioned embedded concrete (30), and in which a molding portion (14) for molding the outer periphery of the block body (31) is formed. Inside the molding part (14) from the main body (11) and the die main body (11) so as to be separable from below and to close the opening (17), and the opening (15). To be introduced into the rod (1
8) and a pressure die (20) which is fitted into the rod (18) and closes the opening (15) together with the rod (18). There is.

The receiving plate (12) is a member that closes the opening (17) and forms the end surface (31b) of the block body (31), and is formed entirely flat. A fixing pin (13) for fixing the joint nut (32) is attached to the mold body (11) at a substantially central portion on the surface side.
The fixing pin (13) is composed of a cylindrical protrusion having a diameter that is almost the same as or slightly smaller than that of the screw hole (32b) of the joint nut (32), and the joint nut ( Fix the screw hole (32b) of 32) to the pin (13)
By fitting the joint nut (32) in the horizontal direction, the horizontal movement of the joint nut (32) can be restricted.

The mold body (11) includes an upper end (11a) and a lower end (11a).
Openings (15) and (17) communicating with the molding portion (14) are formed in b). The opening (15) is a straight hole for passing the rod (18) introduced into the molding part (14) and the pressure die (20) that closes the opening (15) together with the rod (18). Has been formed. The molding part (14) is formed in a tapered shape that fits the block body (31), and the inner peripheral surface is formed around the stepped part (35) of the embedded component (30). A molding step portion (14a) for forming the step portion (35) is formed. The mold body (1
In 1), a filling hole (16) communicating with the upper end of the molding portion (14) and for filling concrete or mortar into the mold cavity from the outside is formed.

Then, in the molding portion (14), the receiving plate (1
Screw hole (32b) of the joint nut (32) which is hung facing the 2) and set on the fixing pin (13) of the receiving plate (12).
A rod (18) for closing the end of the rod (18a) is provided. In addition, the opening (15) moves along the rod (18) and in the axial direction thereof to block the filling hole (16), and at the same time, applies a predetermined pressure to the concrete or mortar filled in the mold cavity. A pressurizing die (20) that can be lifted and lowered is provided so as to be able to move in and out of the molding section (14).

A manufacturing process of the embedded component (30) (see FIG. 2) will be described with reference to FIGS.

First, as shown in FIG. 1 (a), with the backing plate (12) separated from the mold body (11), the fixing nut (13) of the backing plate (12) is attached to the joint nut (32). Insert the screw hole (32b) and set the joint nut (32) in place.

Next, the receiving plate (12) is joined to the mold body (11) and the mold is clamped to form a closed mold cavity. At this time, the tip portion (18a) of the rod (18) is fitted into the upper end portion of the screw hole (32b) of the joint nut (32). And the filling hole (1
Fill the mold cavity with concrete or mortar through 6). In this case, the screw hole (32b) is closed by the tip portion (18a), and concrete or mortar does not flow into the screw hole (32b) (see FIG. 1 (b)).

Then, when the above-mentioned filling into the mold cavity is completed, as shown in FIG. 1 (c), the pressure mold (20) is lowered along the rod (18) to a predetermined position in the mold cavity. Pressurized type (20)
In this case, as the descending position, the filling hole (16) communicating with the upper part of the forming part (14) is blocked to prevent the inflow of excess concrete or mortar, and the filling hole is filled. It is set at a position where concrete or mortar is pressurized with a predetermined pressure. In the mold cavity, the rod (18) forms the home tie introduction hole (33) (see FIG. 2) and prevents the concrete or mortar from flowing into the screw hole (32b) of the joint nut (32). ing. At the same time, the pressed concrete or mortar is pressed against the inner surface of the mold cavity without a gap and the packing density is increased.

Next, when the concrete or mortar solidifies to a predetermined hardness, the receiving plate (12) is separated from the mold body (12) to open the mold (10) as shown in FIG. 1 (d).
At this time, the pressure die (20) is further lowered to forcibly remove the block body (31) from the molding part (14). Then, the block body (31) fitted with the joint nut (32) is removed from the receiving plate (12) to obtain the embedded component (30) (see FIG. 2) shown in FIG. 1 (e).

In the embodiment of the manufacturing method described above, the case where the mold having the molding step portion is used is described. However, it is needless to say that it is extremely suitable when the molding step is omitted or when a mold having another shape is used.

<Effects of the Invention> As described above, according to the method for manufacturing an embedded concrete according to the first aspect of the present invention, a joint nut is embedded in one end surface of the embedded concrete by using the receiving plate, and concrete or The concrete that prevents the mortar from flowing in by introducing it into the molding part of the rod for forming the introduction hole, and coaxially forms the introduction hole of the fastener to be connected to the joint nut on the other end surface of the embedded concrete with the rod of the same as above. Alternatively, a block body made of mortar can be molded, while in the molding process, concrete or mortar is forcibly distributed by using a pressure mold so that the packing density increases every corner of the mold cavity. Therefore, it is possible to prevent the formation of a gap between the mold cavity and the inner peripheral surface. Further, the density of the molded product can be increased to make the corners and edges of the block body firm. Therefore, it is possible to prevent the defective molding of the block body, improve the adhesion to the concrete matrix, and effectively prevent the water leakage to the inside.

Further, according to the molding tool for embedded cement of the invention of the second aspect, there is a peculiar effect that the molding step required in the method for manufacturing the embedded cement can be surely performed.

[Brief description of drawings]

FIG. 1 shows a method for manufacturing an embedded container according to the present invention, and is a process diagram when the molding die according to the present invention is used. FIG. 2 is a partial sectional perspective view of the molded embedded container. FIG. 4 is a cross-sectional view showing an actual construction example using an embedded concrete, and FIG. 4 is a cross-sectional view showing an example of construction using a conventional embedded concrete. (10) ... Mold, (11) ... Mold body, (12) ... Support plate, (1
4)… Molding part, (18)… Rod, (20)… Pressure mold, (3
0)… Embedded concrete, (31)… Block body, (32)… Joint nut, (33)… Home tie introduction hole.

Claims (2)

[Claims] 1. A potting block made of concrete or mortar, in which a joint nut is embedded in one end surface on the large diameter side and an introduction hole for a fastener to be connected to the joint nut is formed in the other end surface. In the manufacturing method, after the joint nut is installed on the receiving plate, the molding die is set on the receiving plate so that the periphery of the joint nut is surrounded by the forming portion to be the mold cavity, and the rod for forming the introduction hole is formed in the same mold cavity. In the state where the hollow part of the joint nut was closed by the tip of the rod introduced, the molding part was filled with concrete or mortar and hermetically sealed, and the concrete or mortar was pressed and solidified by a pressing mold from above. A method for manufacturing an embedded capacitor, comprising: 2. An embedded capacitor in which a joint nut is embedded in one end surface on the large diameter side of a tapered block body made of concrete or mortar, and an introduction hole for a fastener to be coupled to the joint nut is formed in the other end surface. In the molding die to be molded, it is possible to separate the mold body from the mold body where the mold body that forms the mold cavity that molds the outer periphery of the block body is formed, and the both ends corresponding to both end faces of the block body are open, and one end of the mold body And a receiving plate on which a surface portion corresponding to one end face of the block body is formed, and a joint nut is set on the surface portion, and a hollow portion of the joint nut which is introduced into the molding portion from the side opposite to the receiving plate. And a rod which is inserted into the rod, closes the other end of the mold body together with the rod, and moves in the axial direction of the rod to fill the mold cavity. Mold embedding con characterized in that it comprises a pressure type for applying a predetermined pressure to mortar.