JP2006336339A - Form fixing metal fitting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a form fixing metal fitting capable of preventing the percolation of water without making any through-hole in the bottom section of a rising foundation after the completion of a mat foundation or the like. <P>SOLUTION: The form fixing metal fitting 5 as a lower fixing metal fitting includes a plurality of form supporting sections consisting of a claw 7 or the like and a bridge section 20 connecting these form supporting sections by detouring and extending so as to form a space section 30 opened outward between the form supporting sections. When the form fixing metal fitting 5 is used, the space section 30 is filled with a fluid such as a ready mixed concrete or the like to make no through-hole in the bottom section of the rising foundation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a mold fixing bracket made of steel or the like that can be used in the construction of a solid foundation made of reinforced concrete for a building such as a house.

Conventionally, there is a mold fixing bracket 50 as shown in FIG. FIG. 8 shows a state in which the rising foundation 2 is formed on the foundation board 1. In this state, an anchor bolt 60 having a semicircular hook 61 is disposed and embedded in the rising foundation 2, and the fixing bracket 50 with the formwork support part broken off is discarded at the bottom of the rising foundation 2. . In general, such a fixing bracket 50 is used to increase the strength by forming a low semi-circular chevron on the strip to prevent the steel plate product from being deformed during handling. It is the specification which builds up a steel formwork facing by forming a formwork support part upright. This mold fixing bracket 50 is described in Patent Document 1 as a conventional mold interval holder.
JP 2002-115255 A

However, as shown in FIG. 8, in the construction of a solid foundation of a reinforced concrete structure for a building such as a house, a conventional fixing metal fitting 50 used for erection of a steel formwork is completed, and its discarded part is raised after completion. For example, a bowl-shaped tunnel-like through hole 51 is left at the bottom of the foundation 2. That is, after hardening the cast concrete (ready mixed mixed concrete with fluidity), when the steel mold is removed and the unnecessary mold support part of the fixture 50 is broken, and the rising foundation 2 is completed. A tunnel-like through-hole 51 is formed between the foundation base 1 that has been struck and the fixed metal fitting 50 that has been left behind, and is almost not filled with raw concrete.

Thus, since the through-hole 51 is opened, many cases of flooding such as rainwater under the floor have occurred. For example, if inundation such as rainwater occurs inside a building, adverse conditions such as black mold, decay of wood, rust of metals, peeling of building materials, fouling, odor generation, destruction of used parts, etc. Then overlap. These are irreparable fatal defects for buildings such as houses.

Accordingly, an object of the present invention is to provide a mold fixing bracket made of steel or the like that can be used in the construction of a solid foundation of a reinforced concrete structure of a building such as a house having a structure that solves the above problems.

The formwork fixing metal fitting of the present invention that solves the above-described problems is a plurality of formwork support parts, and the formwork support parts are extended by detouring so as to form an open space between the formwork support parts. It has the bridge part connected, It is characterized by the above-mentioned.

In such a mold fixing metal fitting, more specifically, the space portion includes a fluid such as raw concrete placed in a pair of facing mold frames supported by the plurality of mold frame support portions in the space portion. It is formed in a width and shape that is sufficiently spread and completely embedded. A through hole through which the anchor bolt is passed may be formed in the bridge portion. Further, the mold fixing bracket can be integrally formed from a strip-shaped metal plate material. Of course, in addition to a metal plate material such as an iron plate material, a material having a certain degree of strength such as a plastic material or ceramic can be used.

According to the mold fixing bracket of the present invention, in the construction of a reinforced concrete solid foundation for a building such as a house, a bridge extending in the penetrating direction of the rising foundation to the lower fixing bracket for building a pair of facing molds By providing the portion, the filling capacity of the raw concrete and the like to the space portion under the bridge portion is improved, and the integrity of the fixing bracket and the concrete is made perfect. As a result, after the solid foundation is completed, the bottom of the rising foundation does not generate a through-hole, and the thickness of the concrete is sufficiently secured so that there is no concern about water permeability. Can be formed.

With conventional mold fixing brackets, when the bottom fixing bracket is placed in contact with the base substrate that has been hardened once, the shape of the mold fixing bracket is flat. It was almost impossible to stop the inundation of rainwater from the outside regardless of the shape or the shape of the bowl. This is because a gap that is not sufficiently integrated with the raw concrete or the like is generated under the lower fixing bracket. Thus, an unprotected solid foundation appears for extremely permeable water. In order to prevent this, in the lower fixing bracket that penetrates the rising foundation, for example, it is made hollow so that the part in the mold of the fixing bracket itself can be easily wrapped with raw concrete without separating the aggregate. You have to lay raw control etc. in a floating state.

On the other hand, in the mold fixing bracket of the present invention, by providing a bridge portion in the portion of the lower fixing bracket itself, the raw concrete etc. can be smoothly smoothed in the space below the bridge portion without resistance. I try to get around. In this way, the lower fixing bracket and the raw concrete are integrated, so that no through-hole is formed, and the base base and the rising base can be continuously formed without any gap so as to form an integrated solid base.

Specific examples will be described below with reference to the drawings to clarify the embodiments of the present invention.

FIG. 1 is a perspective view showing an embodiment of the mold fixing bracket of the present invention. This mold fixing bracket is a lower fixing bracket 5 that is partly discarded after the ready-container is cured and partly removed. As shown in the figure, the lower fixing bracket 5 has a formwork support portion formed with two claws 7 standing on both sides of the bridge portion 20. The bridge portion 20 has a pair of vertical portions that rise substantially vertically from the surface on which the formwork support portion is formed, and a horizontal portion that connects the vertical portions, and a through hole for passing an anchor bolt (described later) through the horizontal portion. 9 is formed. Under the bridge portion 20 having such a shape, a space portion 30 having a form that can be easily filled with a fluid such as raw concrete is formed to be wide open in both lateral directions. In addition, two small holes 8 through which concrete nails (described later) pass are formed at the feet of the vertical portion of the bridge portion 20. Further, on both side portions extending in the longitudinal direction of the bridge portion 20, bent portions that are folded at a right angle are formed in order to increase the strength. Thereby, it can be set as the durable product which is hard to deform | transform.

The shape seen from the side of the bridge portion 20 is not limited to the above example, and various shapes such as an arch shape and a trapezoid shape are possible. What is necessary is just to select according to a case. What is necessary is just to set the distance between formwork support parts etc. according to the thickness of the standup base requested | required. Moreover, although the lower fixing metal fitting 5 of FIG. 1 has a left-right symmetrical shape with the through-hole 9 in the center portion interposed therebetween, this can also be variously modified depending on the case.

FIG. 2 is a perspective view showing the upper fixing bracket used together with the lower fixing bracket of the present embodiment. This upper fixing bracket 6 can be reused. A through hole 15 for passing an anchor bolt is formed in the center portion, and two claws 16 are formed with two claws 16 interposed between the through holes 15. A formwork support is disposed. Also in the upper fixing bracket 6, bent portions that are folded at right angles to form strength are formed on both side portions extending in the longitudinal direction.

The lower fixing bracket 5 having the above-described configuration is manufactured as an integral part having the bridge portion 20 and the pair of mold-mounting claws 7, thereby increasing the speed and accuracy of the work of the formwork described later. Can be increased. Further, as described above, the lower fixing bracket 5 and the upper fixing bracket 6 can be easily formed by stamping → punching → pressing → molding from a single iron plate by simplifying the shape as much as possible. Can be made. This makes the product inexpensive and enables mass production.

The work of formwork using the above-mentioned formwork fixing bracket is performed as follows. This will be described with reference to FIGS. 3, 4, and 5.

First, as shown in FIG. 3, all necessary assignment / examination work is performed on the mind of the planned building on the foundation foundation 1 that is smoothed. Then, the anchor bolt 11 is fixed by hole-in anchoring at the determined position (perforation by a concrete drill, plug insertion, bolt driving and fixing are performed as described in FIG. 5). Then, the lower fixing bracket 5 is positioned at a predetermined position through the through hole 9 in the center of the plate surface of the bridge portion 20 of the lower fixing bracket 5 of the lower fixing bracket 5 of the present embodiment. Is passed through the hole 8 and the lower fixing bracket 5 is fastened and fixed to the solid foundation 1 with concrete nails.

At this time, it aligns with the gluteal muscle 10 that has been fixed in advance, and at the same time, the upper main muscle 12, the lower main muscle 13 and the abdominal muscle 14 of the transverse muscle are tied together to complete the assembly of the reinforcing bars. In this way, the reinforcement of the rising foundation 2 can be completed more reliably and completely.

Next, as shown in FIG. 4, a pair of steel molds 3, 4 are installed facing each other between the rising claws 7 of the lower fixing bracket 5. Here, at the place where the anchor bolt 11 is installed, the anchor bolt 11 is inserted into the through hole 15 at the center of the upper fixing bracket 6 while the upper ends of the steel molds 3 and 4 are fitted between the claws 16 of the upper fixing bracket 6. And fix it with nuts. Thereby, the steel molds 3 and 4 are also supported by the claws 16 of the upper fixing bracket 6. At other locations, only the lower fixing bracket 5 and the upper fixing bracket 6 are set independently. That is, the concrete fixing of the lower fixing bracket 5 and the fitting of the upper fixing bracket 6 are performed in order to simply support the steel molds 3 and 4 at necessary portions of the intermediate portion.

After that, after taking necessary measures such as applying diagonal reinforcements to the molds 3 and 4 as appropriate, the entire steel mold is assembled and the mold is finished.

Then, as shown in FIG. 4, raw concrete is injected and placed between the pair of steel molds 3 and 4 by a pump car. At this time, it is preferable to use a machine such as a vibrator or the like to sufficiently tighten the raw concrete in the space 30 below the bridge portion 20 of the lower fixing bracket 5 so as to spread more reliably without a gap. Thereafter, when the ready-cured portion is cured after an appropriate curing period, the nut is removed and the upper fixing bracket 6 is sequentially removed from the steel molds 3 and 4 to dismantle the mold frame. Here, the steel frame 3 exposed to the outside of the rising foundation 2 except for a portion of the lower fixing bracket 5 that is configured to form a bridge at the bottom of the rising foundation 2 and is thrown away integrally with concrete, The exposed part such as the nail 7 supporting the 4 is broken and removed. Thus, as shown in FIG. 5, a complete rising foundation 2 having no through-hole at the bottom integrated continuously with the foundation 1 is completed. On this occasion. Anchoring of the anchor bolt 11 to the foundation is performed by the adhesion force of the concrete of the rising foundation 2 corresponding to the length of the anchor bolt material and the binding / binding force to the foundation base 1 in which the anchor bolt terminal is hole-in anchored. It will be.

The following effects are produced by the above working method.
The anchoring end of the anchor bolt 11 is accurately hole-in-anchor (perforated with a concrete drill → plug inserted → the anchor bolt 11 is driven with a hammer) on the base of the foundation base 1 and together with the leading barb 10 By arranging and arranging the upper main muscle 12, the lower main muscle 13, and the abdominal muscle 14 at the same time, the accuracy of the work process is improved, and the arrangement and setting of the rising base 2 on the center line and the base center are advantageous. Under certain conditions, solid foundation construction can be deployed.

Moreover, in the construction of a reinforced concrete solid foundation for a building such as a house, it is impossible to simultaneously perform all the operations with different heights due to the characteristics of the ready-mixed concrete having fluidity. Therefore, after the foundation foundation 1 placed in advance is hardened, the lower fixing bracket 5 is fixed to the foundation foundation 1 with concrete nails, and the pair of facing steel molds 3, 4 are fixed respectively. While being fitted between the claws, the upper fixing bracket 6 and the anchor bolt 11 are connected and stabilized to form a series of mold frameworks, leading to the placement of the rising base 2 to the raw control. At this time, since the lower fixing bracket 5 itself is provided with a bridge portion 20 that rises in the penetrating direction of the foundation 2, the raw metal inside the molds of the lower fixing bracket 5 has a sufficient margin inside the steel molds 3 and 4. Wrapping the part, you can form a completely integrated reinforced concrete structure.

In addition, in the conventional construction method in which the reinforcing bar and the horizontal bar are first assembled only with the reinforcing bars, and then the anchor bolts are bound and placed by placing them in the reinforcing bars, the arrangement of the rising foundation 2 is unavoidable. It was a construction that managed to put it somewhere where it could be arranged, and handling was relatively messy and easy for important parts. According to the working method of the above embodiment, such a current situation is also improved.

FIG. 6 shows the specifications when the wooden base 17 is faced down on the solid foundation according to the above embodiment. By using the lower fixing bracket 5 of the present invention, the foundation 17 without a through-hole can be formed, and the base 17 fastened to the foundation 2 with the anchor bolt 11 anchored in the base foundation 1 is perfectly connected without shaking. is there.

Moreover, FIG. 7 shows the specification at the time of storing the outer wall of a steel structure with a steel trunk edge. Although steel frames are susceptible to rust when exposed to water, as described above, a solid foundation in which the solid foundation 1 and the rising foundation 2 form an integral structure does not attract water from the outside. In addition to the body edges 18 and 19, the studs and the like are isolated from the ground surface and are firmly fixed on the rising foundation 2 with the anchor bolts 11, so an extremely stable outer wall for a steel structure building Can be configured.

It is a perspective view which shows one Example of the mold fixing metal fitting of this invention. It is a perspective view which shows an example of an upper fixing metal fitting. It is a perspective view explaining the working method using the mold fixing metal fitting of this invention. It is a perspective view explaining the working method using the mold fixing metal fitting of this invention. It is a perspective view which shows the standup foundation completed using the mold fixing metal fitting of this invention. It is a perspective view which shows the example of 1 specification using the standup foundation completed using the mold fixing metal fitting of this invention. It is a perspective view which shows the other example of specification using the standup foundation completed using the form-fixing metal fitting of this invention. It is a perspective view explaining the conventional fixture.

Explanation of symbols

5 Formwork fixing bracket (lower fixing bracket)
7 Formwork support (nail)
9 Bridge portion through hole 11 Anchor bolt 20 Bridge portion 30 Space portion

Claims (4)

A formwork fixing bracket having a plurality of formwork support parts and a bridge part extending around the formwork support part so as to form an open space between the formwork support parts. The space is wide and shaped so that a fluid such as raw concrete placed in a pair of facing molds supported by the plurality of mold support parts is sufficiently spread in the space and completely embedded therein. The mold fixing metal fitting according to claim 1, which is formed of The formwork fixing bracket according to claim 1 or 2, wherein a through-hole through which an anchor bolt is passed is formed in the bridge portion. The mold fixing metal fitting according to claim 1, 2 or 3, which is integrally formed from a strip-shaped metal plate.

Images