JPH0533387A - Form panel - Google Patents

Abstract

PURPOSE:To prevent defective construction, etc., by confirming the status of placing of concrete from the outside, and to improve operating efficiency by stretching a gauze on a form frame and stretching a transparent resin film with a large number of pinholes on the inside. CONSTITUTION:Reinforcing ribs 13a are mounted on a form frame 12 and a gauze 13 is stretched. A large number of fine system holes are bored to a transparent synthetic resin film 14, and stretched on the inner surface of the gauze 13. Panel inserting rails, which can be inserted and are formed in a U-shaped cross section, are arranged left and right and up and down, and panels are inserted and strethed among each rail. Separators 17 are interposed on their midways of the reinforcing ribs 13a in order to prevent the deflection, etc., of forms at a time when concrete is placed at that time. When a steel framed reinforced concrete structure is constructed, concrete is placed in forms previously assembled and formed for a post, a girder, etc., in a factory, etc. Only the moisture of concrete is discharged to the outside and side pressure received by the forms is reduced, and concrete is cured and the forms are used as an interior-finish sheathing foundation material as they are.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a form panel forming a form.

[0002]

2. Description of the Related Art Conventionally, when constructing a reinforced concrete structure or a steel frame reinforced concrete structure, reinforcing bars are arranged at a construction site, and a form panel is arranged around the reinforcing bars to assemble the form, Place concrete in the frame,
The formwork is dismantled after the concrete has hardened.

A rectangular plate material is used for the formwork panel so that concrete poured from the formwork formed by the formwork panel will not leak.

[0004]

However, the formwork panel described above has the following problems.

That is, since it is not possible to visually check the concrete pouring condition in the formwork from the outside, a defective pouring place of the concrete may be found after the formwork is dismantled, and the post-treatment requires time and effort. There's a problem.

On the other hand, for the purpose of eliminating defective placement of concrete, vibration may be applied to the placed concrete by using a vibrator or the like, but by adding vibration unnecessarily, the aggregate and the cement are separated. However, there is a problem in that the strength of concrete cannot be kept uniform.

Further, there is a problem that after the concrete is hardened, the formwork must be dismantled and carried out, which requires time and labor for the dismantling work and the carrying-out work.

[0008]

Therefore, in the present invention, a wire net is stretched on the form frame, a transparent synthetic resin film is stretched on the inner side surface of the wire mesh, and a fine hole is formed in the film. It is intended to provide a formwork panel characterized in that a large number of holes are formed.

[0009]

[Operation] When constructing a reinforced concrete structure or a steel-framed reinforced concrete structure, rebar is arranged at the construction site, a form panel is arranged around the rebar, and the form is assembled. Pour concrete into and harden the concrete.

At this time, in the formwork panel, a wire net is stretched on the formwork frame, a transparent synthetic resin film is stretched on the inner surface of the wire mesh, and a large number of holes having a small diameter are punched in the film. Therefore, only the water in the placed concrete can be discharged to the outside through the small-diameter holes of the synthetic resin film, and further through the mesh of the wire mesh, so that the side pressure received by the wall frame panel is reduced. be able to.

In addition, since it is possible to visually confirm the concrete pouring condition from the outside through the wire mesh and the transparent synthetic resin film, when a defective concrete pouring point is invented, a vibrator or the like is used. By applying as much vibration as necessary to the concrete, it is possible to promptly eliminate such placement defects and maintain good homogeneity of the concrete, and to carry out construction work quickly and reliably without the need for post-treatment. be able to.

Further, the form panel is used as a base material for interior and exterior materials of the wall surface without being removed, so that weathering of concrete is prevented by the synthetic resin film,
It is possible to reliably prevent rust from being generated on the reinforcing bar, and to improve the clinging of concrete by the wire netting to prevent the concrete from peeling off and from cracking.

Since the labor for dismantling the formwork and the labor for carrying out the formwork panel after disassembly can be omitted, the construction work efficiency can be improved also from this point.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 shows a prefabricated steel frame rebar formwork unit for a beam having a formwork panel according to the present invention. The unit A includes a steel frame S and a prefabricated rebar unit R. The form K is assembled and formed in a factory or the like.

As shown in FIGS. 2 and 3, the prefabricated rebar unit R is formed in a substantially gate shape and has a large number of shear reinforcing bars 2 arranged at regular intervals in the front-rear direction, and each shear reinforcing bar. Of at least the left and right side corners of the main reinforcement 1 and the pair of left and right connections that extend in the front-rear direction and integrally connect the ends of the shear reinforcement 2 that are adjacent in the front-rear direction. A pair of unit forming bodies r from the bodies 3 and 3
1, r2 are formed, both unit forming bodies r1, r2 are connected to each other,
3 are abutted against each other and can be connected by a connecting bolt 4 as a connecting fitting.

Then, as shown in FIG. 3, the connecting body 3 attached to one unit forming body r2 is connected so as to overlap with the inside of the connecting body 3 attached to the other unit forming body r1 at the time of butting. The piece 3a is formed by extension, and the connecting body that has been polymerized on the inside and outside and the connecting piece 3a are connected by the connecting bolt 4. 5 is a bolt hole formed in each of the connecting piece 3a and the connecting body 3, and 6 is a connecting hole formed in the steel frame S.

As shown in FIGS. 2 and 3, the reinforcing bar unit R surrounds a pair of unit forming bodies r1 and r2 in the vertical direction of the steel frame S so that both unit forming bodies r1 and r2 are surrounded.
The connecting piece 3a and the connecting body can be reinforced by connecting them with the connecting bolts 4, and the positioning of both unit forming bodies r1 and r2 is performed by the flange portions s1 and s
It is designed to be carried out by means of the knitting muscles 7 and 7 which are fixedly provided at a constant interval in the axial direction on the 2nd. Then, the main bars 1 and 1 arranged on the unit forming plates r1 and r2 are fitted into the recesses 7a and 7a, and are welded and positioned and fixed.

As shown in FIGS. 1 and 2, the mold K is formed on the left and right sides and the lower side of the above-mentioned prefabricated rebar unit R, respectively, according to the present invention.
Is stretched on the panel support frame 16 attached to the steel frame S via the knitting bars 7, 7 and stays 11, 11 for assembly.

As shown in FIGS. 4 and 5, the formwork panel 8 comprises a formwork frame 12 and a wire mesh 13 stretched over the formwork panel 8.
A transparent synthetic resin film 14 is stretched on the inner surface of 13 and a large number of holes 15 having a minute diameter (for example, 0.1 to 3 mm) are formed in the film 14. Reference numeral 13a is a reinforcing rib formed in the wire mesh and having a V-shaped cross section.

The other formwork panels 9 and 10 have the same basic structure as the formwork panel 8 described above.
Has a lower height than that of the panel 8 of the form because of the connection of the slab to the upper side.

The panel support frame 16 includes the form panel 8,
Panel-mounting rails 16a each having a U-shaped cross section into which 9 and 10 can be fitted are arranged so that a pair of upper and lower sides are respectively on the left and right sides, and a pair of left and right sides are on the lower side. Form panels 8, 9 and 10 can be fitted and stretched between 16a and 16a in a spatula manner. In addition, if necessary, the stretched formwork panels 8, 9,
It is also possible to fix 10 to each rail 16a with a fixing pin.

Each panel fitting rail 16a is provided with projecting stays 11 and 11 from the left and right side portions of the knitting bars 7 and 7 attached to the steel frame S, and is attached to the tips of the stays 11 and 11 to be supported. I am letting you.

The panel support frame thus formed
The arrangement position of 16 is designed in consideration of the relative distance to the prefabricated rebar unit R, that is, the covering of concrete.

Further, as shown in FIG. 2, FIG. 4 and FIG. 5, between the middle portion of the form panel 8, 9, 10 and the steel frame S,
Through the separator 17, by the separator 17,
The bending of the formwork panels 8, 9 and 10 at the time of placing concrete is prevented.

The separator 17 is attached at its one end by penetrating the reinforcing rib 13a formed in the metal net 13 of the formwork panel 8 to attach the flanges s1, s2 or the web portion s3 of the steel frame S.
The other end is connected to the connection nut 18 attached to the.

FIG. 6 shows a prefabricated steel frame rebar formwork unit A for columns, in which formwork panels 20, 21, 22 and 23 are provided around the prefabricated rebar unit R in front, rear, left and right sides. The form K is assembled by being stretched through.

FIG. 7 shows a prefabricated rebar unit R for columns to be incorporated in the unit A, and 24 is a space for connecting with the unit A for beams. Reference numeral 25 is a connection fitting, which is designed to be caulked to connect the main bars 1 and 1.

The embodiment of the present invention is configured as described above, and according to this embodiment, the following operational effects are produced.

That is, when constructing a steel reinforced concrete structure, a prefabricated steel reinforced form unit A is used.
Are assembled and formed in advance in a factory or the like for pillars or beams, and each unit A is brought to the construction site and erected at a designated place, and concrete is placed in the form K of each unit A to make concrete. After being cured, it is used as a base material for the interior / exterior material of the wall surface without removing the form panel 8, 9, 10.

At this time, in the mold frame panels 8, 9 and 10, a wire net 13 is stretched on the mold frame 12, and a transparent synthetic resin film 14 is stretched on the inner surface of the wire mesh 13, and the film 14 Since a large number of minute holes 15 are formed in the hole, only the water in the cast concrete is discharged to the outside through the minute holes 15 in the synthetic resin film 14 and further through the wire mesh 13. Since it can be discharged, the side pressure received by the wall frame panels 8, 9, 10 can be reduced.

In addition, since it is possible to visually confirm the concrete pouring condition from the outside through the wire net 13 and the transparent synthetic resin film 14, when a defective concrete pouring point is invented, a vibrator or the like is used. By applying as much vibration as necessary to the concrete using, it is possible to promptly eliminate such placement defects and maintain good homogeneity of the concrete. And it can be done reliably.

Further, the form panel 8, 9, 10 is used as a base material for interior and exterior materials of the wall surface without being removed, so that the synthetic resin film 14 prevents weathering of concrete and rusts the rebar. It is possible to reliably prevent the occurrence of cracks, and moreover, it is possible to improve the clinging of concrete by the wire netting 13 and prevent the concrete from peeling off and cracks from occurring.

Since it is possible to save the trouble of dismantling the mold K and the trouble of carrying out the dismantled mold panel,
From this point as well, the construction work efficiency can be improved.

[0035]

According to the present invention, the following effects can be obtained.

Only the water in the concrete can be discharged to the outside through the small-diameter holes and the wire mesh formed in the synthetic resin film, so that the side pressure received by the form panel can be reduced. As a result, it is possible to prevent deformation of the same formwork panel and further prevent defective construction of the concrete structure.

Since it is possible to visually check the concrete placing condition from the outside through the mesh of the wire mesh and the transparent synthetic resin film, it is possible to early invent the defective place of the placing and take an early countermeasure, and to make the concrete uniform. It is possible to ensure good performance.

Further, since the post-treatment of the defective pouring place after hardening of the concrete is unnecessary, the construction work efficiency can be improved.

The form panel can be used as a base material for the interior / exterior material of the wall surface by removing the form panel without removing it.

The synthetic resin film can prevent weathering of concrete and can prevent rust from occurring on the reinforcing bars.

The wire mesh can improve the clinging of concrete to prevent the concrete from peeling off and from cracking.

Since it is possible to save the labor of disassembling the formwork and carrying out the disassembled formwork panel, the construction work efficiency can be improved also from this point.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of a prefabricated steel frame rebar form unit for a beam including a form panel according to the present invention.

FIG. 2 is a sectional front view of the unit.

FIG. 3 is an exploded perspective view of a prefabricated rebar unit for a beam.

FIG. 4 is a partially cutaway perspective explanatory view of a formwork panel according to the present invention.

FIG. 5 is a cross-sectional view of the same formwork panel.

FIG. 6 is a cross-sectional front view of a prefabricated steel frame rebar form unit for a pillar.

FIG. 7 is an exploded perspective view of a prefabricated rebar unit for a pillar.

[Explanation of symbols]

 A Prefabricated steel frame rebar formwork unit S Steel frame R Brehab type rebar unit K Formwork 1 Main bar 2 Shear reinforcement 3 Connected body 8 Formwork panel 12 Formwork frame 13 Wire mesh 14 Synthetic resin film 15 holes

Claims (1)

Claims: 1. A wire mesh is stretched on a form frame, a transparent synthetic resin film is stretched on the inner surface of the wire mesh, and a large number of holes having small diameters are punched in the film. Form panel characterized by doing.