JPH08109741A - Reinforcing material and support for form - Google Patents

Abstract

PURPOSE: To simplify installation work of a reinforcing material for a formwork and to maintain strength of a steel made support by opening holdes on the same positions on each surface with specified intervals in the lengthy direction of each surface of an angular steel of a rectangular section and internally providing a reinforcing plate so as to divide the inside surface of the angular steel into two in parallel with a short side of the rectangular section by the reinforcing plate. CONSTITUTION: Holes 1a, 1b are opened at the same positions on each surface with specified intervals in the lengthy direction on each surface of an angular steel of a rectangular section. Continuously, a reinforcing plate 2 is internally provided so as to divide the inside of the angular steel into two in parallel with a short side of the rectangular section. Thereafter, nails are driven through the holes 1a, 1b of the angular steel as a wooden sash bar, and the angular steel is easily fixed on a poling board. Additionally, connection of batters to each other is facilitated by jointing two pieces of the angular steels as the batters with each other. Additionally, fine adjustment is carried out without lowering compression strength by providing the holes for support pins as supports at different positions in the circumferential direction with specified intervals. Consequently, it is possible to improve workability in form construction and to extensively shorten workinghours.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to building construction, and more particularly to a reinforcing material and a pillar for a formwork used for concrete formwork construction such as walls, columns and beams.

[0002]

2. Description of the Related Art A formwork in a construction work is a mold for forming a skeleton, and is a temporary structure that does not remain after the completion of a building. This is an important work, accounting for 35% and 12-15% of the total work. For this reason, pursuing the economical efficiency of formwork and rationalization will have a great impact on the entire construction. This formwork is installed by combining a weirboard (plywood) to prevent concrete from flowing out and to support lateral pressure, and is fixed by tightening it with formwork clamps together with a reinforcing material such as a splint or joists. . Further, the lower surface of the formwork such as beams and slabs is supported by steel columns.

FIG. 5 is a diagram showing an example of use of a conventional formwork reinforcing material 20, showing a formwork on a wall surface. A square steel splint 22 is vertically aligned in parallel on a veneer plywood weir 21, and is fixed by a binding wire 23 and a nail 24.
On the outside of 2, two thick pieces of square steel 25 are joined and provided, and by means of the form fittings 26, the weir 21 and the pier 2
2 and the thick end 25 are fastened and fixed. The mold clamping member 26 includes a ring-shaped fitting 26a and a wedge 2
Drive 6b to fix it firmly. The stile 22 and the edge thickness 25 are usually of a size of 50 mm × 50 mm, and the mold clamping member 26 is manufactured in accordance with this size.

FIG. 6 is a diagram showing an example of use of a conventional form support 30. The formwork column 30 has a double pipe structure made of steel. The outer pipe is called a waist pipe portion 31, and the inner pipe is called an insertion pipe 32. The insertion tube 32 has pin holes 3 at intervals of about 30 cm.
3 is opened, and a receiving plate 34 is attached to the upper end. The upper outer surface of the waist tube portion 31 is a threaded portion 35, an adjusting screw 36 is fitted therein, and a base plate 37 is provided at the lower end portion. Also, the threaded portion 35
Is provided with an adjustment hole into which the support pin 38 is inserted. To adjust the length of the form support 30, the insertion pipe 32 is pulled out and extended to a predetermined length, the support pin 38 is inserted into the pin hole 33 located in the adjustment hole of the waist tube portion 31, and the adjustment screw 3
Finely adjust the height with 6.

[0005]

As described above, since a large number of reinforcing materials and supporting materials are used in the conventional formwork,
It takes time and labor, and it takes time. In order to improve work efficiency, there is also one in which the fastening metal fittings have been improved from bolts to wedges. However, the weir 21 and the pier 22
In the case of fixing the wire, it is stopped using the binding wire 23 and the nail 24, the workability is remarkably poor, and the quantity is large, so it takes time. Some wooden boards 22 are attached to the weir board 21 in advance and made into a panel, but it cannot be used in the corners where workability is the worst, and there are problems with wood resource protection and strength. The use of is increasing.

Further, the lower surface of the formwork such as a beam is attached to the steel support column 30.
For example, in the case of supporting the steel strut 30, the length of the steel strut 30 cannot be continuously adjusted, and the space between the pin holes 33 is limited due to the problem of strength. Three
Since a plate material or the like is sandwiched between the upper end portion or the lower end portion of 0, adjustment is often performed, and extra work often occurs.

A technical problem of the present invention is that, in such a formwork, in order to improve the workability, a reinforcing material for the formwork which can be easily attached and a steel which can maintain its strength and can be finely adjusted. It is to realize the pillar made.

[0008]

According to a first aspect of the present invention, there is provided a reinforcing material for concrete formwork, wherein each surface of a rectangular steel having a rectangular cross section is provided at a predetermined interval in the length direction and at the same position on each surface. Reinforcing plate for molds, characterized in that holes 1a, 1b are opened and a reinforcing plate 2 is provided inside so that the inside of the square steel is divided into two equal parts parallel to the short sides of the rectangular cross section. It is a material. The reinforcing material 1 is a reinforcing member for supporting the lateral pressure of concrete such as a pier or a log. It is preferable that the square steel has a rectangular cross section and that both cross sectional spaces partitioned by the reinforcing plate become square. For example, the square steel generally used for molds (50 mm × 50m
About half the size (50 mm × 25 mm) is preferable.

The positions of the holes 1a and 1b formed on each surface are
It is preferable that they are provided at the same position in the length direction and at the center of each surface in the width direction, and the interval is preferably about 50 cm. The shape of the holes 1a, 1b is not particularly limited, but the size thereof is preferably small as long as the nail 5 can penetrate the rectangular steel in a state in which the nail 5 is inclined about 45 degrees with respect to the hole surface. .
Further, the reinforcing plate 2 may be provided with holes 2a at arbitrary intervals.

According to a second aspect of the present invention, in a steel strut for concrete formwork, pin holes 12 for supporting pins provided in the insertion pipe 11 are formed at predetermined intervals at different positions in the circumferential direction. It is a frame column 10. The distance between the pin holes 12 is preferably shorter than the major diameter of the adjusting holes provided in the threaded portion of the waist tube portion 13 of the steel column 12 unless the compressive strength in the length direction is reduced. Further, the positions of the holes 12 should be different in the circumferential direction as much as possible.

According to a third aspect of the present invention, there is provided a formwork column 10 in which pin holes 12 for support pins provided in the insertion tube are spirally provided at predetermined intervals.

[0012]

According to the first aspect of the present invention, in the reinforcing material for concrete formwork, the holes 1a, 1 are formed on each surface of the rectangular steel having a rectangular cross section at predetermined intervals in the longitudinal direction and at the same position on each surface.
When b is opened and the reinforcing plate 2 is provided so that the inside of the rectangular steel is divided into two equal parts parallel to the short sides of the rectangular cross section, as a pier, each surface of the rectangular steel is formed. Open hole 1
The nail 5 can be driven through the holes a and 1b and easily fixed to the weir plate 3. Also, if two square steels are used as the thick ends, the width will be half that of the conventional one, and even when four pieces are lined up at the joining part, ready-made tightening metal fittings can be used as they are, and No need for reinforcement. Further, since the reinforcing plate 2 is provided, the strength is equivalent to the conventional one with a half width of the square steel used for the conventional mold. The formwork reinforcing material can be used for both a splint and a log.

According to a second aspect of the present invention, in the steel column for concrete formwork, the pin holes 12 for the support pins provided in the insertion pipe 10 are provided at predetermined intervals and at different positions in the circumferential direction. Since the pin holes are not located in the same direction on the circumferential surface of the insertion tube, unlike the conventional case where the pin holes are located in a fixed direction, the vertical compressive strength is well balanced and the pin hole Since the vertical intervals of 12 can be narrowed, fine adjustment of the height can be easily performed.

According to a third aspect of the present invention, the pin holes 12 for the support pins provided in the insertion tube 10 are arranged at predetermined intervals.
When provided in a spiral shape, the compressive strength in the vertical direction is well balanced, the vertical interval between the pin holes 12 can be narrowed, and the height can be finely adjusted. Also, the pin hole 1
Since the two are arranged side by side in a spiral shape, it is easy to confirm the position of the pin hole 12.

[0015]

EXAMPLES Next, examples of practical use of the formwork reinforcing material and columns according to the present invention will be described.
FIG. 1 shows an embodiment of a formwork reinforcing material 1 according to the present invention.
(1) is a cross-sectional view in the width direction, and (2) is a cross-sectional view in the length direction. This reinforcing material 1 has a plate thickness T1 = 2 mm.
Of rectangular steel having a rectangular cross section (L1 = 50 mm × L2 = 28 mm) and having a length of 4 m, the reinforcing plate 2 (T2 = 2 m
m) is provided. The rectangular steel has a hole 1a with a diameter of 8 mm (D1) on the short side of the rectangular cross section and a vertically long rectangle on the long side (L4 = 4 mm × L5 = 15 m).
m) holes 1b are provided at a pitch of 50 cm (P1). The reinforcing plate 2 has L3 = 20 from both end faces of the square steel.
mm is a cut flat plate, and holes 2a having a diameter of 10 mm (D3) are provided at a pitch of 15 mm (P2). The formwork reinforcing material configured as described above can be used as a pier or a joist as a reinforcing material for withstanding a lateral pressure applied to a dam of a concrete formwork.

FIG. 2A shows an embodiment when used as a weir. The reinforcing material 1 is fixed to the weir board 3 as a pier with nails or the like. As shown in FIG. 2 (2), a nail 5 is inserted from a rectangular hole 1b provided on the long side of the cross section, penetrates diagonally through the rectangular steel, and is a circular hole provided on the short side. 1
It is driven into the weir 3 from a. This formwork reinforcement is
Since the nail 5 can be directly driven and fixed without the need for temporary fixing with the binding wire 23 as in the conventional example (FIG. 5), the workability is very good and a large number of piers can be easily attached. Working time can be significantly reduced.

FIG. 3 shows an embodiment in which the formwork reinforcing material 1 according to the present invention is used as a thick end. The illustrated example is a diagram showing a connection portion of thick ends, (1) shows a butt connection portion, and (2) shows a lap connection portion. The two reinforcing members 1 project from the upper part and the lower part so as to be joined so that the long side portions of the rectangular cross section of the rectangular steel are joined together, and serve as a connecting part, which is fastened by the fastening metal fitting 26. Conventionally, in the case of such a connecting portion, the tightening width of the tightening metal fitting 26 can be tightened only up to two in the case of the conventional square steel, and it is not possible to connect and tighten. For this reason, it is necessary to reinforce the connecting part with a wooden timber or the like. In the present invention, since the width is about half, it is possible to tighten up to four fasteners 26 at once. Further, since the reinforcing plate 2 is provided inside the square steel, the same strength as that of the conventional square steel can be obtained, so that the reinforcement becomes easy and the special reinforcement of a portion having a high weight is performed. Further, the square steel provided inside the reinforcing plate may be formed by bending a plate material into a letter V shape.

FIG. 4 shows an embodiment of the mold column 10 according to the present invention. A pin hole 12 is formed in the insertion tube 11. The pin holes 12 are equally spaced (angle θ) in the circumferential direction as shown in FIG. 4 (2), and the adjacent pin holes 12 have different height positions as shown in FIG. 4 (1). Is provided as follows. In addition, the pin hole 12 provided in the insertion tube 11
May be provided in a spiral shape. The vertical pitch of the pin holes 12 is ⅙ of the conventional pitch. Therefore, the height can be adjusted more finely than in the conventional case, and an extra work of sandwiching the plate material between the upper end portion and the lower end portion of the mold column 10 is eliminated. Moreover, the compressive strength in the vertical direction is

[0019]

According to the first aspect of the present invention, in the reinforcing material for concrete formwork, the holes 1a are formed in each surface of the rectangular steel having a rectangular cross section at predetermined intervals in the longitudinal direction and at the same position on each surface. 1b is opened, and the reinforcing plate 2 is internally provided so that the inside of the square steel is divided into two equal parts parallel to the short sides of the rectangular cross section.
It can be easily fixed to a weir board, and when it is used as a hem, it is possible to improve the workability in formwork construction such that the hem can be easily connected to each other and can be easily reinforced. Working time can be significantly reduced.

According to the second aspect of the invention, in the steel column for concrete formwork, the pin holes 12 for the support pins provided in the insertion pipe 11 are provided at predetermined intervals and at different positions in the circumferential direction. By doing so, it is possible to realize a steel strut that can be finely adjusted without reducing the vertical compressive strength applied to the strut 10. Like Claim 3, the pin hole 12 for the support pin provided in the said insertion pipe 11 is carried out.
However, since they are spirally provided at predetermined intervals, fine adjustment can be easily performed without lowering the compression strength.

As described above, according to the present invention, it is possible to provide a formwork reinforcing material and a column which can improve the work efficiency of the formwork and greatly reduce the work time.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a formwork reinforcing material according to the present invention.

FIG. 2 is a diagram showing a usage example in which the formwork reinforcing material according to the present invention is used as a crosspiece.

FIG. 3 is a diagram showing an example of use when the formwork reinforcing material according to the present invention is used as an edge.

FIG. 4 is a view showing an embodiment of a mold column according to the present invention.

FIG. 5 is a perspective view showing an example of use of a conventional mold frame reinforcing material.

FIG. 6 is a perspective view showing an example of use of a conventional formwork column.

[Explanation of symbols]

 1 Reinforcing material for formwork 1a, 1b Hole 2 Reinforcing plate 2a Hole 3 Weir board 5 Nail 10 Formwork column 11 Insert pipe 12 Pin hole

Claims (3)

[Claims] 1. A reinforcing material for concrete formwork, comprising:
Holes 1a and 1b are formed on each surface of a rectangular steel having a rectangular cross section at a predetermined interval in the length direction and at the same position on each surface, and the inside of the rectangular steel is parallel to the short side of the rectangular cross section. To 2
A reinforcing material for a formwork, characterized in that a reinforcing plate 2 is provided so as to be equally divided. 2. A steel support column for a concrete formwork, in which a pin hole 12 for a support pin provided in an insertion pipe 11 is provided.
Are provided at predetermined intervals and at different positions in the circumferential direction. 3. A formwork column, wherein pin holes 12 for support pins provided in said insertion tube 11 are spirally opened at predetermined intervals.