JPH0331534Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a formwork for concrete panels having stirrup bars protruding from the end faces.

[The problem that the idea aims to solve]

In recent years, stirrup reinforcements 2 surrounding H-beams 3, as shown in Figures 3 and 4, are suitable for interconnecting concrete panels horizontally or vertically or for integrally pouring floor slabs. A concrete panel 1 in which one side portion and an upper end reinforcement 4 extend from the upper end surface has been put into practical use. Normally, this panel 1 has stirrup reinforcements 2 at its upper end, H-beams 3 at the center, and upper end reinforcements 4 at the corners to form a wall beam.

Conventionally, in order to form this concrete panel 1, as shown in FIG. A cut was made in the steel formwork 6 to insert the stirrup muscle 2, and the stirrup muscle 2 was made to protrude. However, gaps occur between the steel formwork material 6 and the stirrup reinforcements 2, making it easy for concrete slag to leak out.Furthermore, if the formwork material is repeatedly used, the accuracy of the formwork decreases, causing even more slag to leak out. has become more common. As a result, the precision of the molded panel end faces deteriorated, and the cleaning of the formwork was time-consuming. In addition, steel formwork materials are heavy, making it difficult to attach or detach them to the end faces of panels with complex structures, and the safety is not sufficient.

This idea was made in view of the above circumstances. The purpose is to propose a formwork for concrete panels that has little leakage of concrete slag, has excellent workability and safety in cleaning the formwork, attachment and detachment, and can efficiently form highly accurate products.

[Means and examples for solving the problem]

This concrete panel formwork has H on the end surface.
A rubber elastic material having an L-shaped cross section and a plurality of cuts into which the stirrups are inserted into two edges of the L-shape, in a formwork for a concrete panel in which one side and top reinforcement of a substantially rectangular stirrup reinforcement surrounding a section steel are extended. Place the formwork material within the two corners of the stirrup bar 1 side part, insert the upper end bar into the inside corner of the L-shaped formwork material, fit the stirrup bar into the notch on the two edges, and insert the stirrup bar into the outside corner. It is characterized in that the part is brought into contact with the H-shaped steel flange.

Figure 1 shows an example of this formwork for concrete panels, in which H-shaped steel 3, stirrup bars 2 surrounding the H-shaped steel 3, and upper end reinforcement 4 are arranged. The lower formwork material 7 is assembled. In the two corners of one side of the stirrup bars 2, which should protrude from the end face of the panel, there are two formwork members 8, 8' made of rubber elastic bodies with an L-shaped cross section.
As shown in FIG. 2, the formwork members 8 and 8' are provided with a plurality of notches 10 and 10 at precisely aligned positions on two edges thereof, into which the stirrup muscles 2 are closely fitted. be.

The L-shaped formwork members 8 and 8' placed at the two inner corners of the stirrup bar 2 have the upper end bar 4 inserted through the inner corner, and the stirrup bar 2 is fitted into the notches 10 and 10 on one side of the two edges. The protruding corner is a flange 5 of H-beam steel.
It is brought into contact with the edge.

In addition, the upper and lower peripheral mold members 11 and 1 are placed at the outside positions of the stirrup bars 2 of the two formwork members 8 and 8', respectively.
1' are arranged to constitute a formwork.

[Effects of action and design]

Since the rubber elastic formwork material of this formwork material has an L-shaped cross section, the top reinforcement is placed inside the corner of the stirrup reinforcement where the reinforcement is placed, with the top reinforcement inserted into the L-shaped corner. be able to. Also, insert stirrup muscles into the multiple cuts on the two edges, and make the protruding corner H.
By bringing it into contact with the section steel flange, it is possible to form a formwork surface that is continuous with the H section steel flange surface and has stirrup bars extending over it.

The L-shaped two-edge notch can hold the stirrup muscle three-dimensionally with high positional accuracy and prevent slag from leaking from the interface with the stirrup muscle. In addition, when assembling and dismantling the formwork, it can be deformed by rubber elasticity and installed into a narrow corner where a large number of stirrup bars extend, or it can be pulled out from within a corner after concrete is poured.

As described above, this formwork can prevent the leakage of slag and form concrete panels with high precision reinforcement. In addition, the workability and safety of assembling, dismantling, or cleaning the formwork are excellent. Therefore, it becomes possible to efficiently manufacture highly accurate products.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the formwork of the example, Fig. 2 is a perspective view of the upper and lower L-shaped rubber formwork members, and Figs. 3 and 4 are front views of the panel with stirrup bars extending from the upper end surface. and AA sectional view, and FIG. 5 is a sectional view of a conventional formwork. 1... Concrete panel, 2... Stirrup reinforcement, 3... H-shaped steel, 4... Upper end reinforcement, 5... Flange, 6... Steel formwork material, 7... Lower formwork material,
8, 8'...Rubber formwork material, 9...Two perpendicular pieces of rubber formwork material, 10...Notch, 11...,1
1'... Upper and lower peripheral formwork materials.

Claims (1)

[Scope of utility model registration request] In a formwork for a concrete panel in which one side and top reinforcement of a substantially rectangular stirrup reinforcement surrounding an H-shaped steel protrudes from the end face, the cross section is L-shaped, and multiple cuts are made in which the stirrup reinforcement is inserted into two edges of the L shape. A rubber elastic formwork material having
Place it in the two corners of the side, insert the upper end reinforcement into the inside corner of the L-shaped formwork material, fit the stirrup reinforcement into the notch on the two edges, and abut the outside corner against the H-shaped steel flange. A formwork for concrete panels characterized by being compacted.