JPS6221628Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is designed to prevent bending of the concrete formwork when constructing a concrete frame by pouring concrete using a concrete formwork formed by interconnecting individual concrete formworks that are substantially rigid. This invention relates to concrete formwork support fittings that support concrete formwork.

In order to construct a concrete frame such as a concrete waterway using cast-in-place concrete, the shape of the concrete frame must be constructed by interconnecting substantially rigid concrete formwork such as single metal concrete formwork. The molds are placed opposite each other, and concrete is poured between the molds to construct a concrete structure such as a concrete waterway.

In this case, in concrete waterways, etc., the frame is often made wider at the bottom than at the top due to strength considerations. An example is shown in Figure 1.
In the figure, reference numeral 2 denotes a metal concrete formwork unit that is substantially rigid, and concrete formworks 1A and 1B are installed side by side by connecting the end faces of adjacent formwork units 2 and 2 to each other by, for example, U clips 3. , Meanwhile, concrete A is poured to construct a cast-in-place concrete waterway. In constructing a concrete frame that is wider at the bottom than at the top, a bent portion B is created in the formwork 1A, as can be seen from the figure.

The present invention makes it possible to construct a concrete frame as designed by providing a supporting metal fitting for the concrete formwork at the bent portion, so that the inclination angle of the bent portion can be arbitrarily adjusted.

Therefore, the concrete formwork support fitting according to the present invention is a formwork support fitting that supports the bent portion of the formwork when concrete is poured and a concrete frame is constructed using a formwork formed by connecting single concrete formworks. The formwork support fittings include a pair of support pieces that are approximately L-shaped on the sides that engage the corner formed by one side surface and the back side of the adjacent formwork units, and a pair of support pieces that are welded to each of the support pieces. It consists of a right-handed screw nut, a left-handed screw nut, and a bolt that is screwed into the right-handed screw nut on one side and the left-handed screw nut on the other side, and has an operating handle in the center.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3.

In Figure 2, 2A and 2B are adjacent concrete formwork units, 2A is the upper formwork unit, and 2B is the lower formwork unit, and each formwork unit 2A and 2B is made of a metal plate. As with conventional formwork, the surface A, back side B, and 4 are in contact with the concrete to be poured.
It has a rectangular shape with two side faces and is substantially rigid. The formwork units 2A and 2B are arranged at an angle, and by creating an angle between the formwork units 2A and 2B in this way, a relatively large gap C is created, so make sure that concrete does not enter into that part C. A splint 4, which is a relatively thin metal plate bent into a chevron shape, is connected to the lower end of the upper single formwork 2A and the upper end of the lower single formwork 2B.

The part indicated by 5 as a whole is a formwork support metal fitting, and the formwork support metal fitting 5 is composed of the following members.
6A and 6B are a pair of support pieces that are approximately L-shaped on the sides and engage with the corner portion D formed by one side surface C and the back surface B of the adjacent formwork units 2A and 2B, and are used to bend the metal plate. It is formed by For example, 7A is a nut with a right-hand thread, and 7B is a nut with a left-hand thread.
B are welded to each other. 8 is a bolt with a right-handed thread on one side 8A and a left-handed thread on the other side 8B, one side 8A is screwed into the nut 7A, and the other side 8B is screwed into the nut 7B. 9 is an operating handle attached to the center of the bolt 8.

When assembling a concrete formwork with a single formwork, the above-mentioned support fitting 5 is used at the bent part B of the formwork,
The support pieces 6A and 6B of the support fitting 5 are engaged with the lower ends of the adjacent formwork units 2A and the upper ends of the formwork units 2B, as shown in FIG. 2, to support the formwork units 2A and 2B. By rotating the operating handle 9, the angle formed by the formwork units 2A and 2B, and therefore the angle of the bent portion B of the formwork 1A, is adjusted. The formworks 1A and 1B are assembled in this manner, and once the formwork assembly work is completed, concrete is poured between the formworks 1A and 1B in the conventional manner. Once the concrete has hardened, the formwork will be disassembled and removed.

As explained above, according to the present invention, when constructing a waterway with cast-in-place concrete that is wider at the bottom than at the top, the inclination angle of the bent part of the formwork can be easily adjusted to any angle. Therefore, the work of laying the formwork can be expedited, and the concrete frame can be constructed as designed.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the arrangement of concrete formwork when constructing a concrete waterway by casting on site using concrete formwork made by connecting formwork units, and Fig. 2 and 3 show the implementation of the present invention. A concrete form support fitting according to an example is shown, with FIG. 2 being a side view and FIG. 3 being a front view. 1A, 1B...Concrete formwork, 2A, 2B
... Single formwork, 5 ... Concrete formwork support fittings, 6A, 6B ... Support pieces, 7A, 7B ... Nuts, 8 ... Bolts, 9 ... Operation handles.

Claims (1)

[Scope of utility model registration request] A formwork support fitting that supports the bent part of the formwork when constructing a concrete frame by pouring concrete using a formwork formed by connecting single concrete formworks, and the formwork support fittings are connected to the adjacent formwork. A pair of support pieces having a substantially L-shaped side surface that engages with a corner formed by one side surface and the back surface of a single formwork, a right-hand screw nut and a left-hand screw nut welded to each support piece, respectively; A concrete formwork support fitting characterized by consisting of a bolt that is screwed into a left-hand screw nut on the other side and has an operating handle in the center.