JPH0796216B2 - Method of manufacturing form for PC plate manufacturing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is for a curtain wall in which an upper end and a lower end are formed with a notch-like rising portion and a hanging portion for preventing intrusion of rainwater from horizontal joints. PC (precast concrete)
The present invention relates to a method for manufacturing a PC plate manufacturing form used for manufacturing a plate.

[Conventional technology]

Conventionally, steel molds (so-called bed molds) have been used in the manufacture of this type of PC plate for curtain walls.

[Problems to be Solved by the Invention] Generally, a steel mold is suitable for mass production of PC plates with a single mold because it is robust and has high durability, but since it is made of steel, It is difficult to manufacture the frame itself, and the manufacturing cost of the mold itself is high.In particular, when the surface shape of the PC plate to be manufactured is complicated, it is difficult to manufacture the frame, so the mold manufacturing cost is high. It was extremely expensive.

By the way, when mass-producing PC plates of the same shape, the larger the number of molds used, the more PC plates can be manufactured in a short period of time, which reduces the construction period for large-scale construction work in which many PC plates are used. It goes without saying that the contribution is great. However, in reality, as described above, the cost of the formwork itself is high, so even in the construction of skyscrapers and other large-scale construction work, the formwork quantity cannot be increased so much, The production efficiency of the PC version is low, and the construction period is not a little sacrificed.

In view of the above-mentioned current situation, the present invention is a mold main body for molding the majority of the PC plate, a large number of PC divided into end formwork for molding the hanging back surface side of the PC plate. This makes it possible to easily and inexpensively manufacture a plate-making mold, thereby increasing the number of molds to be used, and when manufacturing a PC plate, in the state where the mold main body and the end mold are assembled, Even if the holding means for holding and fixing the main body and the end form is not provided,
A method of manufacturing a PC plate manufacturing mold that can prevent relative displacement between the mold main body and the end mold to improve the PC plate manufacturing efficiency and greatly contribute to shortening the construction period. Is proposed.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows. That is, the method for manufacturing a PC plate manufacturing form according to the present invention is a PC for a curtain wall in which upper and lower ends are formed with a notched rising portion and a hanging portion for preventing intrusion of rainwater from horizontal joints. Manufacture a prototype of the same shape as the plate, place the prototype on a horizontal surface plate, install a peripheral formwork around, and then, between the hanging part of the prototype and the peripheral formwork facing this, While placing the cement-based caking fluid in a substantially flush manner with the surface of the prototype, a material that does not adhere to the caking fluid while it is not set yet Place the protruding edged edging plate with a concave and convex cross-sectional shape with the flat end of the edging plate placed on the prototype, and in this state, cement-based solidifying flow above the prototype and the edging plate. Place the body flush with the upper edge of the surrounding formwork,
After demolding, form a concrete peeling film on the surface molded with the prototype, the mold main body for molding most of the PC plate, and the end for molding the hanging back surface side of the PC plate It is characterized in that a PC plate manufacturing mold divided into a mold and a mold is manufactured.

As the cement-based solidifying fluid, for example, concrete, mortar, GRC (glass fiber reinforced concrete mortar), SFRC (steel fiber reinforced concrete mortar), etc. are used, and reinforcing bars are buried if necessary. . The material of the prototype can be set appropriately. For example, a prototype made of steel, wood, clay, gypsum, or sand mixed with a solidifying material can be used, and a prototype having a concrete release film formed on the surface of the manufactured PC plate can also be used.

[Action]

According to the above configuration, if one prototype is manufactured, it is divided into a mold main body for molding most of the PC plate and an end mold for molding the hanging back surface side of the PC plate. Numerous PCs
It is possible to easily and inexpensively manufacture a plate manufacturing formwork.

In particular, according to the above configuration, since the protrusions for anchors are projectingly provided on the upper surface of the edging plate installed on the cement type solidifying fluid for the end form, the edging plate, Adhering to the cement-based solidifying fluid side (form frame main side) that is placed afterwards above it, and separating from the preceding cement-based solidifying fluid (end form) on the lower surface. Become. Moreover, since the cross-sectional shape of the edge cutting plate is uneven,
When manufacturing a PC plate, in a state where the mold main body and the end mold are assembled, the convex portion (or concave portion) of the edge cutting plate attached to and integrated with the main mold body, and the convex portion (or concave portion). The concave portions (or convex portions) of the end formwork formed by the above are fitted to each other, and the formwork is not required to provide a holding means for holding and fixing the formwork main body and the end formwork. It is possible to prevent relative displacement between the main body and the end form.

Also, most of the manufactured formwork is a cement-based solidifying fluid, but since a concrete peeling film is formed on the surface, the There is no adhesion, it has the same function as a steel form,
Even so, when the PC plate has been manufactured and the mold is no longer needed, the mold can be finely crushed to facilitate transportation and subsequent handling.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

The PC plate 2 shown in FIG. 1 is a PC manufactured by the method of the present invention.
It is manufactured using a plate manufacturing form. This PC
The plate 2 constitutes a wall (curtain wall) by itself by being attached to a manufactured steel frame, and has an uneven pattern formed on its surface and prevents rainwater from intruding from horizontal joints at its upper and lower ends. For this purpose, a notched rising portion 13a and a hanging portion 13b are formed.

The method for manufacturing the PC plate manufacturing frame A used for manufacturing the PC plate 2 will be described in detail below.

As shown in FIG. 2A, a PC plate to be manufactured, that is, a prototype B having the same shape as the PC plate 2 shown in FIG. 1 is manufactured. Since the prototype B has the same shape as the PC plate 2, not only the surface shape but also the shape of the peripheral end face corresponds to that of the PC plate 2, and the rising portion 14 corresponding to the rising portion 13a and the hanging portion 13b.
It has a and a hanging portion 14b. The material of the prototype B can be appropriately selected. For example, it may be made of steel. In the case of steel prototype B, it is difficult to manufacture depending on the surface shape, but one prototype B
If it is manufactured, a large number of PC plate manufacturing molds A can be manufactured by using this, so that the overall profit can be obtained. Further, if the prototype B is made of wood, clay, gypsum, or sand mixed with a solidifying material, it is easier to manufacture than the steel prototype B, and the cost of manufacturing the prototype is low. However, in these cases, the first
As shown in FIG. 4A, it is desirable to form a release film b for preventing the cement-based solidifying fluid described later from adhering to the surface. The release film b is formed, for example, by laminating a resin sheet or applying an epoxy resin. It is also possible to use as the prototype B a PC plate 2 having the release film b formed on the surface thereof.

As shown in FIG. 2B, the prototype B is placed on a horizontal surface plate 8
It is placed on top and the peripheral formwork 9 is installed around it.

Thereafter, as shown in FIG. 2C, the reinforcing bar 11a is arranged between the hanging portion 14b and the peripheral formwork 9 facing the hanging portion 14b via a spacer (not shown). In this state, the hanging part 1
A cement-based consolidating fluid 12a is cast between the 4b and the peripheral formwork 9 opposite thereto in a substantially flush manner with the surface of the prototype B, and while the consolidating fluid 12a is not solidified yet. Sex fluid
An edge-cutting plate 16 made of a material that does not adhere to 12a and provided with a plurality of projections 15 for anchors such as stud bolts on the upper surface.
Is installed with its flat end resting on the prototype B. As will be described later, as the edging plate 16, an edging plate 16 having an uneven cross section is used in order to prevent positional deviation between the divided molds. As the edging plate 16 having an uneven cross section, a deck plate or a keystone plate used as a permanent formwork for floor slabs, which is cut to an appropriate size, can be suitably used.

Immediately after the edging plate 16 is installed, as shown in FIG. 2 (d), a spacer (not shown) is provided between the edging plate 16 and the master B, and between the rising portion 14a and the peripheral formwork 9 facing the rising portion 14a. Reinforcing bar 11b is arranged through. The insert metal fitting 6 for mounting the suspending tool 7 is attached to the reinforcing bar 11b in advance.

After that, as shown in FIG. 2 (e), a cement-based solidifying fluid 12b is cast above the prototype B and the edging 16 so as to be flush with the upper end of the peripheral formwork 9.

As the cement-based setting fluid 12a, 12b, for example, concrete, mortar, GRC (glass fiber reinforced concrete mortar), SFRC (steel fiber reinforced concrete mortar), etc. are used.

In this state, curing for a required period (preferably heating curing)
When the cement-based setting fluids 12a and 12b are set, the mold is removed as shown in FIG. in this case,
The mold A is not required to be as strong as the PC plate 2 that is manufactured, and it is sufficient if the mold A does not break during the demolding and subsequent manufacturing processes. It is moldable. Since the edging plate 16 is provided with a projection 15 such as a stud bolt on the upper surface, the edging plate 16 adheres to the side of the cement-based setting fluid 12b that is cast later on the edging plate 16 and adheres to the lower surface. It is separated from the cement-based caking fluid 12a on the leading side.

Then, as shown in FIG. 2 (g), an epoxy resin is applied to the surface (molding surface) of the main body A ₁ (the _one in which the cement-based solidifying fluid is solidified) formed by the mold B. Forming a concrete peeling film A ₂ by, for example, a mold main body A ′ for forming most of the PC plate 2 and an end form frame for molding the back side of the hanging part 13b of the PC plate 2 Thus, the PC plate manufacturing form A divided into A ″ is obtained. When forming the concrete release film A ₂ , it is possible to laminate the resin sheet as described above, but the curing period is short, Epoxy resins are preferred because they have strong adhesion even if they are not completely dried.

In the present invention, since the edging plate 16 has an uneven sectional shape such as a deck plate or a keystone plate, as shown in FIG. In a state in which the end form A ″ is assembled, the protrusion (or recess) of the edging plate 16 attached to and integrated with the form main body A ′ and the end formed by the protrusion (or recess). The concave portion (or the convex portion) of the mold A ″ is fitted to each other, and the mold is not required to be provided with a sandwiching means for sandwiching and fixing the mold main body A ′ and the end mold A ″. It is possible to prevent relative displacement between the main body A ′ and the end form A ″.

〔The invention's effect〕

Since the present invention has the above-mentioned configuration, the following effects can be obtained.

Manufactures a PC plate manufacturing form used to manufacture PC plates for curtain walls, in which upper and lower ends are provided with a notched rising part and a hanging part to prevent rainwater from entering through horizontal joints. In doing so, if one prototype having the same shape as the PC plate is manufactured, a mold main body for molding the majority of the PC plate and an end mold for molding the hanging back surface side of the PC plate It is possible to easily and inexpensively manufacture a large number of PC form manufacturing frames divided into and.

It is a formwork divided into a formwork main body and an end formwork, but since the cross-sectional shape of the edging plate is formed in an uneven shape, when the PC plate is manufactured, the formwork main body and the end formwork are In the assembled state, the convex portion (or concave portion) of the edging plate that is attached to and integrated with the mold main body, and the concave portion (or convex portion) of the end mold formed by the convex portion (or concave portion) Are fitted to each other, and a relative displacement between the main mold body and the end mold can be prevented without providing a clamping means for clamping and fixing the main mold body and the end mold. .

As mentioned above, many PC form making molds can be easily and cheaply manufactured, so it is profitable to increase the number of molds to be used. Even if the clamping means for clamping and fixing the partial formwork is not provided, the relative displacement of the formwork main body and the end formwork can be prevented, so the work at the time of manufacturing the PC plate can be simplified. As a result, the production efficiency of the PC plate can be improved, which can greatly contribute to the shortening of the construction period.

Most of the manufactured formwork is a solidified cement-based solidifying fluid, but since a concrete peeling film is formed on the surface, concrete adheres when the PC plate is manufactured. It has the same function as a steel form, but when the PC plate is no longer manufactured and the form is no longer needed, the form is finely crushed for transportation and other handling. Can be facilitated.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of a PC plate,
2A to 2G are sectional views for explaining a method for manufacturing a PC plate manufacturing frame used for manufacturing the PC plate shown in FIG. A ... PC plate manufacturing form, A '... form frame mainly, A "... end form, B ... prototype, 2 ... PC plate, 12a, 12b ... cement-based solidifying flow Body, 15 ... Protrusion, 16 ... Edge cutting board.

Claims (1)

[Claims] 1. A prototype B having the same shape as a PC plate 2 for a curtain wall, which has a rising portion 13a and a hanging portion 13b which are notched to prevent rainwater from entering from horizontal joints at the upper and lower ends. After manufacturing, the prototype B is placed on a horizontal surface plate 8 and a peripheral formwork 9 is installed around it, and then the hanging portion 14b of the prototype B is placed.
A cement-based solidifying fluid 12a is placed between the surface of the mold B and the peripheral formwork 9 facing the same, and is approximately flush with the surface of the prototype B. Fluid 12
A material that does not adhere to a
The edging plate 16 having a convex and concave cross-section is placed with its flat end placed on the prototype B. In this state, the cement-based material is placed above the prototype B and the edging plate 16. The solidifying fluid 12b of (1) is cast flush with the upper end of the peripheral formwork 9, and after demolding, a concrete peeling film is formed on the surface formed by the prototype B, and most of the PC plate 2 is A mold for producing PC plate A is divided into a mold main body A'for molding and an end mold A "for molding the back side of the hanging portion 13b of the PC plate 2 is manufactured. And a method for manufacturing a PC plate manufacturing form.