JPH07207750A - Constructing method for concrete building frame for housing - Google Patents

Abstract

PURPOSE:To improve safety and workability of removing a form after a building frame is formed in a constructing method of concrete building frame for a house capable of repeated use and of assembling easily when an unexperienced person connects the form. CONSTITUTION:A continuous footing is layed on a floor concrete 1 or slab 3 by connecting first forms 15, 16 having a height H and second forms 22, 23 of which height is about 50mm to each other with the latter set on the former. After it is hardened, the second frame is removed to expose the upper part of the footing. Then, flanges 27, 28 for connecting third forms 25, 26 onto flanges 17, 18 for connecting the first forms with bolts/nuts 24 are interposed to have a space. Thereafter, concrete is applied onto the third forms 25, 26 and concrete body integrated with the footing is formed. When the forms are removed, the third forms 25, 26 are pulled down strongly with operation of the bolts/nuts so that the forms are separated from the concrete, thereby attaining easy removal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening formwork structure for a residential concrete skeleton and a method for forming an opening in a residential concrete skeleton.

[0002]

2. Description of the Related Art A conventional concrete frame formwork was used once because a carpenter worked on the site by processing plywood boards and the like, which required a long construction period and the formwork dimensions differ from house to house. It is often not applicable to the next house construction, and even if the dimensions are the same, if it is damaged when peeling the plywood plate from the concrete frame, it cannot withstand reuse and must be incinerated. There is a problem that a large amount of wood resources are wasted.

[0003]

On the other hand, the present inventor, in Japanese Patent Application No. 5-330136, can standardize the structure and dimensions of the formwork to adapt it to various floor plans of a house and use it repeatedly. Proposal of a new concrete concrete formwork structure for homes that can be done and saves the work of carpenters on site, and can always easily assemble the ones with accurate dimensions even if unskilled workers connect and build the formwork. ing.

The present invention has been made in connection with this proposal, and it is an object of the present invention to provide a method for constructing a concrete frame for a house with high workability and safety.

[0005]

The method for constructing a concrete frame for a house according to the present invention comprises a first connecting flange having a horizontal first connecting flange at a predetermined height (H) from the upper surface of the soil concrete or slab. The outer formwork and the first inner formwork are connected in the horizontal direction, and a second connecting flange that contacts the first connecting flange is provided, and the first outer formwork and the first inner formwork are provided. The second outer formwork and the second inner formwork having the same body contact face as the concrete body face specified by the formwork are connected to the first outer formwork and the first inner formwork, and Then, the first green concrete is driven into the first and second inner and outer molds to form a concrete skeleton having a predetermined height (H + h), and after it is solidified, the second inner and outer molds are Removed, and then the concrete formed by the removed second inner and outer formwork A third inner flange which sandwiches the upper end portion of the frame and has a third connecting flange which faces the first connecting flange and holds a predetermined gap (D) smaller than (h) above. Formed by the first ready-mixed concrete by connecting the formwork and the third outer formwork via adjustable bolts and nuts, then driving the second ready-mixed concrete into the third inner-outer formwork It is characterized by forming a concrete skeleton that is integral with the skeleton.

Further, after the concrete skeleton made of the first and second ready-mixed concrete is formed, the predetermined gap (D) is shortened by tightening the bolt and nut, thereby making the third inner and outer formwork concrete. It is characterized by being released from the body.

[0007]

[Operation] After the concrete frame forming the outer wall and the partition wall of the house is formed at the predetermined height (H + h), the second form is removed and the third form is put on the first form via the bottle nut. The formwork of is constructed. When ready-mixed concrete is poured into the third formwork and it hardens, the third formwork is joined to the concrete skeleton and its peeling becomes difficult, but when the bottle nut is tightened, the third formwork Among them, the one closest to the first formwork and the joint surface of the concrete skeleton are subjected to a shearing force and the joined state is released. Once this closest one is removed, the formwork can be easily removed in turn, and all of the third formwork can be removed.

[0008]

EXAMPLE FIG. 1 is an elevational view of a two-story house in which the method of the present invention has been carried out, showing a state in which the formwork is still joined to the front face of the concrete frame as seen from the outside. In this state, the point to be especially noted is the first step A in which the formwork is constructed from the soil concrete 1 to a predetermined height (H ₁ + h) and the concrete is hit, the formwork of the height (h) is removed and the concrete is removed. The second step B of exposing a part of the skeleton, the third step C in which the formwork of the first floor is built up to the slab 3 while holding the gap portion 2 on the cloth foundation, and concrete is poured, The fourth step D of constructing a formwork up to (H ₂ + h) and hitting concrete, the fifth step E of constructing a formwork of height (h) to expose a part of the concrete frame, on the slab It is possible to construct a second-stage formwork up to the rooftop 5 while holding the gap part 4 and to divide it into a sixth step F of pouring concrete, which can be divided into A, B, C on the left side of FIG. The symbols D, E, and F are used.

These molds are usually rectangular and can be connected vertically and horizontally except for special parts such as corners where walls are bent at right angles and T-shaped parts which intersect with partition walls. FIG. 2 shows a perspective view of a normal formwork. The formwork 6 is made of a metal plate and has a rectangular joint 7 that is joined to the concrete frame.
And connecting flange portions 8 and 9, which are integrally formed on the four sides thereof.
A resin layer is provided on the inner surface (joint surface) of the joint portion 7 to facilitate mold release from concrete. The flange portions 8, 9, 10 and 11 are provided with through holes for supporting fasteners for fixing to the flange portions of the adjacent formwork at predetermined intervals, and the joint portion 7 has a thickness of the concrete frame. 14 are provided at predetermined positions for attaching the prescribed spacers. The mold frame 6 is assembled with the flange portion facing outward and facing each other.

Next, the construction method of the gap portions 2 and 4 which is the most characteristic part of the present invention will be described with reference to FIGS. Figure 3
[Fig. 3] is a cross-sectional view showing a state where the concrete formwork of the process A is constructed on the soil concrete 1 (or slab 3).
The first outer mold 15 and the first inner mold 16 have, for example, a height H.
₁ = 600 mm, lateral dimension W eg 260 mm, 454 mm, 9
09 mm standardized rectangular joint portion, first connecting flanges 17 and 18 formed on the upper side thereof, and wide flange portions 19 and 20 abutting on the soil concrete 1
And connecting flanges formed on both the left and right sides of the joint, and the inner and outer mold frames 15 and 16 are held by the spacers 21 ... On the inner and outer molds 15 and 16, second molds 22 and 23 for forming a gap are joined. This second formwork 2
2 and 23 have a height of, for example, h = 50 mm or more, and the joint surface to be joined to the concrete skeleton has the first formwork 15 and 16
Forms the same plane as.

Next, as shown in FIG. 4, ready-mixed concrete is poured between the inner and outer molds to form soil concrete and a cloth foundation. For example, height (H ₁ + h) = (600
After concrete is struck up to +50) mm and the cloth foundation is solidified, the second formwork 22 and 23 are removed, and FIG.
As shown in FIG.
The above concrete frame is exposed.

Next, as shown in FIG. 6, bolt nuts 24 ... 24 are inserted into the through holes of the first connecting flanges 17 and 18.
And a predetermined distance D smaller than the above h, for example 4
The third flanges 27 and 28 formed on the lower sides of the third inner and outer molds 25 and 26 are connected to each other with a distance of 0 mm. In this state, the third formwork 25, 26 holds the exposed concrete skeleton.

In this connecting bolt nut 24, for example, as shown in FIG. 9, the inner nut is contracted and then the outer nut is tightened to reduce the distance D between the first flange 18 and the third flange 28. The mold can be displaced in the height direction.

Next, as shown in FIG. 7, green concrete is poured into the third inner and outer formwork 25, 26 to be integrated with the concrete skeleton having a concrete floor height (H + h).

After the concrete has solidified, the fasteners of the connecting flanges of the third formwork 25, 26 adjacent to the gap 2 are removed to free the formwork, and then the bottle nut 24 is operated. And pull the formwork 25, 26 downward,
A shearing force acts on the joint surfaces to release the joint surfaces of the molds 25 and 26 from the concrete skeleton, and the molds 25 and 26 can be removed, resulting in the state shown in FIG. 8. In this way
Once part of the formwork has been removed, the adjacent formwork can then be easily removed and these formworks can be reused.

Although the steps for the first floor have been described above, the steps for the second floor above the slab can be similarly performed. Further, the mold used in the step C can be shared with the step F.

[0017]

According to the present invention, after the concrete is hardened while the molds are continuously connected to both inner and outer surfaces of the wall,
The mold can be detached and removed very easily, the workability of assembling and releasing the mold is improved and the construction period is shortened, and the mold is not damaged and the number of repeated uses is extended.

[Brief description of drawings]

FIG. 1 is an elevational view showing a state where a formwork is still bonded to the entire surface of a concrete skeleton in an embodiment of the present invention.

FIG. 2 shows a perspective view of a formwork 6 used in the present invention.

FIG. 3 is a cross-sectional view of the first stage showing the method of the present invention over time.

FIG. 4 is a sectional view of the second stage showing the method of the present invention over time.

FIG. 5 is a sectional view of a third stage showing the method of the present invention over time.

FIG. 6 is a cross-sectional view of the fourth step showing the method of the present invention over time.

FIG. 7 is a sectional view of a fifth step showing the method of the present invention over time.

FIG. 8 is a sectional view of a sixth step showing the method of the present invention over time.

FIG. 9 is an enlarged view of the bolt nut 24 of FIG. 5.

[Explanation of symbols]

 1 ... ・ Soil concrete 2 ・ ・ ・ ・ ・ ・ Gap part 3 ・ ・ ・ ・ Slab 4 ・ ・ ・ ・ Gap part 5 ・ ・ ・ ・ Rooftop 6 ・ ・ ・ ・ ・ ・ Formwork 7 ・ ・ ・ ・ ・ ・ Formwork joint 8, 9, 10, 11 ... Flange for connection of formwork 15 ... First outer formwork 16 ... First inner formwork 17 ... First connection flange 18 ... Second flange for connection 22 ... Second outer mold 23 ... Second inner mold 24 ... Bottle nut 25 ... Third outer mold Frame 26 ... The third inner formwork

Claims (2)

[Claims] 1. A first outer formwork and a first inner formwork, which are provided with a horizontal first connecting flange at a predetermined height (H) from the upper surface of an earth concrete or slab, are horizontally connected. Together with a second connecting flange that abuts the first connecting flange, and the same skeleton contact surface as the concrete skeleton surface specified by the first outer mold and the first inner mold The second outer formwork and the second inner formwork are connected to the first outer formwork and the first inner formwork, and then the first and second inner formwork forms Pour the fresh concrete to form a concrete skeleton with a predetermined height (H + h), and after it is solidified, remove the second inner and outer molds, and then form the removed second inner and outer molds. Sandwiching the upper end of the concrete skeleton, and pairing with the first connecting flange. The third inner mold and the third outer mold having a third coupling flange for holding a predetermined gap (D) smaller than the above (h) are connected through adjustable bolts and nuts. Then, second concrete is poured into the third inner and outer formwork to form a concrete skeleton integral with the skeleton formed by the first fresh concrete, concrete for housing, How to build a body. 2. A house in which, after the second ready-mixed concrete is solidified, the bottle nut is tightened to reduce the predetermined gap (D), thereby freeing the third inner and outer formwork from the concrete skeleton. Method for building concrete frame.