JP2001179724A - Concrete panel molding form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete panel molding form, on which the anti-crack measure of a concrete panel is applied by improving the conventional concrete panel molding form. SOLUTION: In a prefabricated concrete panel molding form 8, in which side frames 13L, 13R, 13F and 13B are mounted to the four sides comprising the outer periphery of a bottom frame 12 so as to form a box mold and projected parts, which are obtained by turning inside out joint grooves, are provided on the top and bottom sides of the arbitrary side frames 13L, 13R, 13F and 13B, inwards projecting stepped parts 13b and 13b are formed by deforming the top and bottom parts of the inner surfaces of the side frames 13F and 13B, resulting in constituting the side frames 13F and 13B so as to have the channel shaped cross-section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a formwork for forming a concrete panel in a prefabricated building.

[0002]

2. Description of the Related Art Conventionally, a structure for joining a concrete panel for a wall made of a PC board or the like in a prefabricated building, in which joint hardware is installed at four corners of the concrete panel, and the joint hardware of each concrete panel is connected to a connecting bolt. In a configuration in which a concrete panel is erected by connecting via a nut or the like, a concave portion is provided in the joint surface of the concrete panel and joint processing is performed by caulking to prevent intrusion of rainwater, draft, and the like. Further, in order to form the concave portion, a plate or the like is joined and fixed to the upper and lower ends of the side frame of the concrete panel forming form by plug welding from the back side to form a convex portion, and ready-mixed concrete is poured into the form. A concrete panel was being formed.

[0003]

However, in the side frame of the conventional concrete panel forming form, skill is required to perform welding so that there is no gap between the side frame and the projection. It was also necessary to remove the distortion on the side of the frame.
Also, when the ready-mixed concrete flows into the gap between the side frame and the convex portion and solidifies as it is, a convex portion opposite the male and female is formed on the mating surface of the concrete panel, and when the protruding portion is cut off, , There was a risk of chipping to the vicinity. If the concrete panel is chipped or cracked in this way, it needs to be repaired, which is costly and troublesome, and causes a delay in the construction period.

[0004] In view of the above, it is an object of the present invention to provide a concrete panel forming form in which the concrete panel forming form is improved to take measures to prevent chipping of the concrete panel.

[0005]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, as described in claim 1,
A side frame is attached to four sides of the outer periphery of the bottom frame to form a box shape, and joint grooves and convex portions opposite to the male and female are provided on upper and lower sides of an arbitrary side frame. The upper and lower parts are deformed to form a step that protrudes inward,
The cross-sectional shape is a “concave” shape to form the side frame.

According to a second aspect of the present invention, the upper and lower portions of the inner surface of the side frame are formed by pressing to form a step which projects inward, and the side frame has a pot-like cross-sectional shape.

[0007]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a state in which concrete panels in a prefabricated building are erected, FIG. 2 is a plan view of the same,
FIG. 3 is a side view, FIG. 4 is a side view and a partially enlarged view showing a configuration of a concrete panel forming form according to the present invention,
5 is a plan view showing a configuration of a concrete panel forming form, FIG. 6 is a view of the same from the longitudinal direction, FIG. 7 is a sectional view taken along line AA in FIG. 5, and FIG. 8 is a sectional view taken along line BB in FIG. ,
FIG. 9 is a diagram of a concrete panel incorporating a joint hardware.
10 is a plan view showing the structure of the clamp, FIG. 11 is a side view of the same, FIG. 12 is a view showing a concrete panel formed by a concrete panel forming form, and FIG. 13 is a front sectional view showing a connection state of a metal joint. FIG. 14, FIG. 14 is a perspective view showing the structure of a metal joint for a concrete panel, FIG. It is a figure which shows the defect of the concrete panel formed by the frame.

First, an embodiment of a building in which a concrete panel according to the present invention is built will be schematically described. As shown in FIG. 1 to FIG. 3, the prefabricated building is constructed by joining and laying concrete panels 1... You. As shown in FIG. 13, the joining / building of the concrete panels 1, 1... Is performed by providing joints 2 installed at the four corners of each concrete panel 1 while providing openings 20 a such as windows at appropriate positions. Are connected and fixed to the concrete panel 1 via the connecting bolts 10 and the nuts 11 and are connected and fixed to the anchor bolts 22 of the foundation 21.

As shown in FIG. 3, concave portions are formed at the joints on the inner and outer side surfaces of the concrete panel 1.1, and the backup materials 17 are pressed into the concave portions with a spatula or the like, and are filled. The recessed portion is filled with urethane foam 18 and the portion that has been excessively fired is cut off with a cutter, and a urethane-based caulking material 19 is injected into the outer recessed portion with a caulking gun, and caulking is performed so that rainwater and the like do not enter the joint. I am giving.

[0010] As shown in FIG.
A pair of horizontally long plate-shaped metal plates 3 and 3 are bent so as to form an octagon in plan view, and a gap is formed by interposing gap members 4 and 4 made of wires or the like at portions where both ends are overlapped and connected. It can be formed and fixed by welding or the like. With this configuration, the joining hardware 2
Has an opening 2a that is octagonal in plan view, and the lid 6 is attached to the one opening 2a.

Further, connecting holes 3a, 3a, 3a, 3a are opened in the side surfaces of the plate-shaped metal plate 3, 3.
The connection holes 3a, 3a, 3a, 3a are holes for connecting the reinforcing bars 23 of the concrete panel 1 shown in FIG. 5, holes for connecting to the foundation 21 shown in FIG.
It is used as a hole to connect with.

The horizontally long plate-shaped metal plate 3 is bent at four positions, and the connecting holes 3a are formed at both ends and a center thereof.
3a are opened. By joining and fixing the single metal plate 3 as a pair, the metal joint 2 having an octagon in plan view can be formed.

As shown in FIG. 5 and FIG.
Are arranged so that the octagonal opening 2a can be seen from the back side at the four corners of the concrete panel 1, and are arranged in the formwork by connecting and supporting the reinforcing bars 23, and the concrete is cast by casting concrete. Installed in panel 1.

.. (FIG. 14) are provided on the surface of the lid 6 attached to the metal joint 2 to act as anchors to the concrete panel 1 and to serve as anchors to the concrete panel 1. The strength can be ensured and the surface finish can be improved.

Next, a concrete panel forming form according to the present invention will be described. As shown in FIGS. 5 and 6, the concrete panel forming form 8 has four side frames 13 </ b> L • in the shape of the edge (in this embodiment, rectangular) of the concrete panel 1 to be formed on the upper surface of the bottom frame 12. 13R
・ 13F and 13B are erected. Each side frame 13L ・ 13
R, 13F, and 13B are fixed to the bottom frame 12 by bolts or the like.

As shown in FIG. 5, the side frames 13L, 13R, 13F, 13 of the concrete panel forming form 8 are formed.
B is configured to be hinged by a hinge. The side frame 13F
The inner surfaces of the side frames 13L and 13R are fitted to both end surfaces of 13B, and the four corners of the concrete panel forming form 8 are tightened with clamps 30, 30... To set the form.

As shown in FIGS. 10 and 11, the clamp 30 includes stays 30a and 30b, a hook 30d, a connecting rod 30e, and the like. The stays 30a and the side frames 13L and 13R are provided at both ends of the side frames 13F and 13B. The stay 30b is provided at both ends of the stay 30a.
The hook 30d is pivotally supported by the stay 30b, and an inner portion of the hook 30d is joined to an adjusting nut 30f fitted to an outer portion of the connecting rod 30e. Is formed by forming an engagement portion 30g having both ends protruding in a “T” shape in plan view.

When the concrete panel forming form 8 is set by the clamps 30, 30..., The engaging portion 30g of the connecting rod 30e is
0a, the hook 30d is turned, the connecting rod 30e is pulled outward, and the adjusting nut 30
The hook 30d is lowered to the fastening position while adjusting f, and the side frames 13F and 13B and the side frames 13L and 13R are fastened.

Conventionally, as shown in FIG. 15, the side frames 13F and 13B of the concrete panel forming form 8 are provided with side steps 13b and 13b on the side surfaces 13a of the side frames 13F and 13B.
13b was joined by plug welding.
In order to prevent the formation of the gap T between the side surface 13a of the F · 13B and the stepped portions 13b / 13b, skill is required, and it is necessary to remove the distortion of the side surface 13a. Flows and solidifies as it is, FIG.
As shown in FIG.
When the excess concrete 1c is protruded from b and the concrete 1c is cut off, there is a possibility that the depressed portions 1b and 1b may be missing. When the concrete panel 1 is chipped or cracked in this way, it needs to be repaired, which is costly and troublesome, and causes a delay in the construction period.

Therefore, the present invention simplifies the work process by forming the step of the side frame 13 of the concrete panel forming form 8 as follows. As shown in FIG. 4, the side frame is formed by processing a strip-shaped steel plate by press working or the like, and forming a concave plate 13 ′ so that both sides have a stepped shape.
a is formed.

The side frames on which the concave plate 13'a is formed by pressing or the like are not limited to the side frames 13F and 13B, but may be
L · 13R, or all 13L · 13R · 13F · 4 frames of the concrete panel forming form 8
13B, only one side frame, or three side frames may be used, and a specific side frame is not limited to a concrete panel in accordance with a joining purpose. In other words, when the concrete panel 1 is formed by pouring ready-mixed concrete into the prefabricated concrete forming form 8, a convex shape is formed on the front and rear end surfaces of the concrete panel 1 on the concave side frames shown in FIG. 7. A plane shape is formed on the side frame of the plane shown in FIG.

In this way, by forming the steps of the side frames 13'F and 13'B of the concrete panel forming form 8 by press working or the like to form an integral structure, the steps as in the prior art are formed. No gap is formed between the side frames 13b and 13b and the side surfaces 13a of the side frames 13F and 13B, and as a result, the side frames 13 without protruding the extra concrete 1c into the depressions 1b and 1b of the concrete panel 1. 'F ・ 1
The inner surface of the 3'B is finished to a smooth convex surface, and a defective member having a chipped or cracked convex surface is not formed. Therefore, repair work is greatly reduced as compared with the conventional method, and as a result, the productivity of the concrete panel is reduced. Will be improved.

The structure of the concrete panel forming form 8 according to the present invention has been described above for the concrete panel 1 for a wall. However, the structure can be applied to a concrete panel for a floor. Is obtained.

A concave portion is formed at the seam by abutting the two end surfaces of the concrete panel 1.1 thus formed into a convex shape, and a caulking process is performed during the construction process so that rainwater or the like does not enter the concave portion. It is done. And FIG.
As shown in the figure, the concrete panel 1 formed by the concrete panel forming form 8 has a convex shape obtained by transferring the inner surface shape of the side frames 13F and 13B of the concrete panel forming form 8 to its front and rear end faces 1F and 1B. Is formed. In the front and rear end surfaces 1F and 1B of the concrete panel 1, the depressions 1b at the upper and lower ends are formed by side frames 13F and 13B.
It is formed by step portions 13b projecting above and below B.

In this manner, the form of the formwork is simplified to prevent chipping of the concrete panels 1,..., And the concrete panels 1,. … Is generally transported and assembled using a local advance method or a transport vehicle, and the construction period at the site is four days in a four-story one-story building.
The construction period is shortened by four days for one two-story (stacked) building for seven days, and for 14 days for one middle-rise building with 12 houses.

[0026]

As described above, the present invention has the following advantages. That is, as in claim 1, a prefabricated concrete panel in which side frames are attached to four sides of the outer periphery of the bottom frame to form a box shape, and convex portions for forming joint grooves are provided on upper and lower sides of an arbitrary side frame. By forming a step in the upper and lower portions of the side frame inward in the molding frame, the step portion is integrally formed with the inner surface of the side frame, and between the step portion and the inner surface of the side frame as in the related art. Without making a gap, finished into a concrete panel with a concave convex shape of the inner surface of the side frame and a smooth convex side opposite to the male and female, without making a defective member chipped or cracked in the convex surface, Repair work can be greatly reduced as compared with the related art, and as a result, the productivity of concrete panels can be improved.

According to a second aspect of the present invention, the upper and lower portions of the side frame are formed by pressing to form a step, so that the same effect as described above can be obtained. In addition, by processing the upper and lower portions of the inner surface of the side frame by a press machine, A prefabricated concrete panel forming form can be easily and easily manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a concrete panel in a prefabricated building is erected.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a side view and a partially enlarged view showing a configuration of a concrete panel forming formwork according to the present invention.

FIG. 5 is a plan view showing a configuration of a concrete panel forming formwork.

FIG. 6 is a view similarly viewed from a longitudinal direction.

FIG. 7 is a sectional view taken along the line AA in FIG. 5;

FIG. 8 is a sectional view taken along line BB in FIG. 5;

FIG. 9 is a diagram of a concrete panel in which metal joints are incorporated.

FIG. 10 is a plan view showing a configuration of a clamp.

FIG. 11 is a side view of the same.

FIG. 12 is a view showing a concrete panel formed by a concrete panel forming mold.

FIG. 13 is a front sectional view showing a connection state of a metal joint.

FIG. 14 is a perspective view showing a configuration of a metal joint of the concrete panel.

FIG. 15 is a side view and a partially enlarged view showing a configuration of a conventional concrete panel forming mold.

FIG. 16 is a view showing a defect of a concrete panel formed by a conventional concrete panel forming mold.

[Explanation of symbols]

 Reference Signs List 1 concrete panel 8 concrete panel forming form 12 bottom frame 13 side frame 13b step

Claims (2)

[Claims] 1. A prefabricated concrete panel forming form in which side frames are attached to four sides on the outer periphery of a bottom frame to form a box shape, and convex portions for forming joint grooves are provided on upper and lower sides of an arbitrary side frame. A concrete panel forming form, wherein upper and lower portions of the side frame are stepped inward. 2. The concrete panel forming form according to claim 1, wherein the upper and lower portions of the side frame are formed with a step by press working.