JP2000352192A - Driving formwork - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To easily and accurately construct a beam with a wall by using a driving formwork made of a steel folded plate. SOLUTION: Reinforced concrete having a U-shaped cross-section having a bottom form part 12 and a pair of side form parts 13 is formed integrally with the bottom form part so as to be continuous with the bottom surface of the beam. An opening 14 having a size corresponding to the wall thickness is provided at a position where the structural wall 17 is to be formed. When a wall is provided at the center of the lower surface of the beam, a pair of L-shaped cross-section divided bodies 15 each having the same cross-sectional shape, each of which is formed by a side frame portion and a bottom frame portion, are connected to each other by securing an opening and facing each other. It is connected by the tool 16.
When a wall is provided at a position closer to one side of the beam, a flat plate-shaped divided body serving as one side formwork portion and an L-shaped cross-sectional divided body constituted of the other side formwork portion and a bottom formwork portion are provided. Are secured to each other with an opening secured to each other and connected by a connector.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving formwork made of a steel folded plate for forming a reinforced concrete or steel reinforced concrete beam.

[0002]

2. Description of the Related Art In recent years, a driving formwork 1 for a beam as shown in FIG. This is a U-shaped cross section of a steel folded plate, a so-called keystone plate,
Since it is not necessary to assemble or disassemble and remove it on site, it is much more excellent in workability and construction accuracy than when using conventional plywood formwork, and can save labor and cost related to beam construction It is. Reference numeral 2 in FIG. 15B indicates a floor formwork, and 3 indicates a floor slab.

[0003] By the way, a wall is often formed integrally with the bottom surface of the beam, but when constructing such a beam with a wall, a driving form having a U-shaped cross section as shown in FIG. 1 cannot be used as it is, and if it is intentionally used, it will be as shown in FIG. 16 or FIG. 17, for example. FIG. 16 shows a case in which a wall is provided at the center of the lower surface of the beam, and the driving form 1 having an L-shaped cross section obtained by dividing the driving form 1 into right and left is used as one set. FIG. 17 shows a case in which a wall is provided at a position close to one side of the beam. A driving form 4 having an L-shaped cross section is used only on one side of the beam, and the wall form 5 is extended on the other side as it is. It is a mold.
16 and 17, reference numeral 6 denotes a beam reinforcing bar, 7 denotes a wall reinforcing bar, 8 denotes a floor reinforcing bar, 9 denotes a separator, and 10 denotes a clamp.

[0004]

However, since it is necessary to use the separator 9 in the above case, the operation procedure is not much different from the case of using the conventional plywood form, and the use of the driving form is significant. Almost no. Therefore, conventionally, it has been general to use a conventional method without using a driving form for a beam with a wall.

[0005] In view of the above, it is an object of the present invention to provide a driving formwork made of a folded steel plate for constructing a beam with a wall.

[0006]

SUMMARY OF THE INVENTION The invention of claim 1 is a driving formwork made of a folded steel plate for forming a reinforced concrete beam or a steel reinforced concrete beam. The bottom form has a U-shaped cross section and a side form and a wall length and wall at a position where a reinforced concrete wall to be formed integrally with the bottom of the beam is to be formed. An opening having a dimension corresponding to the thickness is provided.

According to a second aspect of the present invention, the driving form of the first aspect is formed by opening a pair of L-shaped cross-sections having the same cross-sectional shape each comprising a side form and a bottom form. The parts are secured and arranged to face each other and connected by a connecting tool.

According to a third aspect of the present invention, the driving form according to the first aspect of the present invention comprises a flat plate-shaped divided body serving as one side form part, and the other side form part and a bottom form part. The divided body having the L-shaped cross section is arranged to be opposed to each other with an opening secured and connected by a connecting tool.

[0009]

FIG. 1 shows a driving form 11 according to a first embodiment of the present invention, wherein (a) is a sectional view and (b).
Is an enlarged cross-sectional view, (c) is a side view, and (d) is a plan cross-sectional view (view taken along the line dd in (c)). The driving form 11 of the first embodiment is made of a folded steel plate (keystone plate), and has a U-shaped cross-sectional shape having a bottom form 12 and a pair of side forms 13 as a whole. Although it was manufactured, a slit-like opening 14 was secured in the center of the bottom surface. That is, the driving form 11
A pair of L-shaped cross-sections 15 each including a bottom mold section 12 and a side mold section 13 are arranged facing each other with an opening 14 secured therebetween, and the divided bodies 15 are separated by a connecting tool 16 at a predetermined interval. It is in the form linked by. Opening 1 above
The position and width of 4 are set in accordance with the installation position, wall length, and wall thickness of the wall 17 (see FIG. 1A) integrally formed on the lower surface of the beam formed by the driving formwork 11. Have been. Reference numeral 18 denotes a runner, and 19 denotes a reinforcing metal provided as needed.

FIGS. 2 to 7 show a construction procedure in the case of constructing a reinforced concrete beam 20 using the above-mentioned driving formwork 11. FIG. After assembling the wall reinforcing bar 7 as shown in FIG. 2, the wall formwork 5 is assembled as shown in FIG. The wall form 5 may be formed by a conventional method using the separator 9 and the fastening hardware 10, and the top of the wall form 5 is (c).
It is preferable to attach a guide metal 21 as shown in FIG. Then, as shown in FIG. 4, the driving form 11 is set on the wall form 5. At this time, by inserting the guide hardware 21 into the opening portion 14 of the driving formwork 11, the installation can be easily performed, and the positioning accuracy can be naturally ensured. As shown in FIG. 5, the floor form 2 is assembled, and as shown in FIG.
After assembling the floor reinforcing bars 8, concrete is poured into the wall form 5, the driving form 11, and the floor form 2, and after curing,
When the wall form 5 is dismantled, the beam 20, the wall 1
7. The floor slab 3 is formed.

FIG. 8 to FIG. 13 show a construction procedure in the case of constructing a steel reinforced concrete beam 22 using the driving formwork 11 described above. As shown in FIG.
After assembling the beam reinforcing bars 6, the driving formwork 11 is installed in advance as shown in FIG. Then, as shown in FIG. 10, after assembling the wall reinforcing bar 7 into the driving formwork 11, the wall formwork 5 is assembled as shown in FIG.
After assembling the floor form 2 and the floor reinforcing bar 8 as shown in FIG. 12, concrete is poured into the wall form 5, the driving form 11 and the floor form 2, and after curing, the wall form is formed. Fig. 1
As shown in FIG. 3, the beam 23, the wall 17, and the floor slab 3 are formed.

The above-described driving form 11 can be handled in the same manner as the conventional driving form 1 having a simple U-shaped cross section shown in FIG. It is possible to extremely easily and accurately construct the beams 20 and 23 with walls without using the separator 9 and the fastening hardware 10, and it is possible to realize labor saving and cost reduction of the work related to the construction. Of course, the driving form 11 has a very simple structure in which a pair of divided bodies 15 of the same shape obtained by bending a steel folded plate into an L-shape are connected only by connecting members 16 with the opening 14 interposed therebetween. It is lightweight, easy to handle, and can be manufactured at a sufficiently low cost.

FIG. 14 shows a driving formwork 25 according to a second embodiment. This is applied to a case where the wall 17 is provided at a position close to one side of the beam, and includes a flat plate-shaped divided body 27 serving as one side formwork part 26, the other side formwork part 26 and a bottom formwork. Part 28
A divided body 29 having an L-shaped cross section is arranged so as to be opposed to each other while securing the opening portion 14 and connected by the connecting member 16, and can be used in exactly the same manner as in the first embodiment. Yes, a similar effect can be obtained.

[0014]

According to the first aspect of the present invention, there is provided a punching formwork having a U-shaped cross section made of a steel folded plate, and having a size corresponding to a wall thickness at a position where a wall of the bottom formwork portion is to be formed. With an opening,
It is possible to construct a beam with a wall very simply and accurately by handling it in the same manner as a conventional simple U-shaped cross-section formwork, and it is possible to save labor and cost for the work related to the construction. it can.

According to a second aspect of the present invention, a pair of L-shaped cross-sections each having the same cross-sectional shape, each including a side frame portion and a bottom frame portion, are arranged facing each other with an opening secured by a connecting member. Since they are connected, a beam having a wall provided at the center of the lower surface can be efficiently constructed.

According to a third aspect of the present invention, a flat plate-shaped divided body serving as one side mold section and an L-shaped section divided body formed of the other side mold section and a bottom mold section are formed with openings. Since it is secured and arranged opposite to each other and connected by a connecting tool, it is possible to efficiently construct a beam having a wall at a position closer to one side.

[Brief description of the drawings]

FIG. 1 shows a driving formwork according to a first embodiment of the present invention.

FIG. 2 is a view showing a construction procedure in the case of constructing a reinforced concrete beam using the driving formwork, and is a view showing a state where a wall reinforcing bar is assembled.

FIG. 3 is a view showing a state where the wall formwork is assembled.

FIG. 4 is a view showing a state in which a driving form is installed.

FIG. 5 is a view showing a state where the floor formwork is assembled.

FIG. 6 is a diagram showing a state where the beam reinforcing bar and the floor reinforcing bar are assembled.

FIG. 7 is a diagram showing a state in which a wall, a beam, and a floor slab are completed.

FIG. 8 is a view showing a construction procedure when constructing a steel reinforced concrete beam using the driving formwork, and is a view showing a state where a beam steel frame and a beam reinforcement are assembled.

FIG. 9 is a diagram showing a state in which the driving formwork is installed.

FIG. 10 is a view showing a state where the wall reinforcing bars are assembled.

FIG. 11 is a view showing a state where the wall formwork is assembled.

FIG. 12 is a view showing a state where a floor form and a floor reinforcing bar are assembled.

FIG. 13 is a diagram showing a state in which a wall, a beam, and a floor slab are completed.

FIG. 14 shows a driving formwork according to a second embodiment of the present invention.

FIG. 15 is a view showing a driving frame made of a conventional general steel folded plate.

FIG. 16 is a view showing an example of a case where a beam with a wall is constructed by a driving form made of a steel folded plate.

FIG. 17 is a diagram showing another example of a case where a beam with a wall is constructed by a driving form made of a folded steel plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Driving formwork 12 Bottom formwork part 13 Side formwork part 14 Opening 15 Divided body 16 Connector 17 Wall 20, 22 Beam 25 Driving formwork 26 Side formwork part 27 Divisional body 28 Bottom formwork 29 Divisional body

Claims (3)

[Claims] 1. A driving form made of a steel folded plate for forming a reinforced concrete or steel reinforced concrete beam, comprising a U-shaped cross section having a pair of side forms and a bottom form. In addition, the bottom formwork is provided with an opening having a size corresponding to the wall length and wall thickness at a position where a reinforced concrete wall to be formed integrally with the bottom of the beam is to be formed. Driving formwork characterized by becoming. 2. A pair of L-shaped cross-sections each having the same cross-sectional shape, each of which has a side frame portion and a bottom frame portion, are connected to each other by a connecting member while securing the opening and facing each other. The driving formwork according to claim 1, characterized in that: 3. A flat plate-shaped divided body serving as one side mold section and an L-shaped cross section formed of the other side mold section and a bottom mold section are opposed to each other with the opening secured. The driving formwork according to claim 1, wherein the driving form is arranged and connected by a connecting tool.