JPH0340182B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a formwork method for constructing concrete structures and reinforced concrete structures.

(Prior art) The conventional formwork construction method involves setting up a weir board made of wood or metal in a predetermined shape, fixing it from the outside with supports such as battens and pillars, and placing it inside the formwork. This method involves removing the weir plates and shoring once the poured concrete has hardened to the required strength. However, in the conventional formwork construction method, when assembling the formwork, a large number of weir plates are accurately installed one by one so that there are no gaps after assembly, and they are securely fixed so that they do not shift. Furthermore, in the case of formwork for complex-shaped structures, it was necessary to cut the weir plates each time according to the drawings, making assembly of the formwork extremely troublesome. Furthermore, when metal foam or plastic panels are used for the weir board, the concrete surface is too smooth, so mortar from plastering does not adhere well, and the finished parts may peel off later.

(Objective of the Invention) This invention was proposed in view of the above circumstances, and it simplifies and saves labor in formwork work, can easily handle complex-shaped structures, and has a plastered surface finish. The purpose of the present invention is to provide a concrete formwork construction method that can prevent the finished part from peeling off.

(Structure of the Invention) FIG. 1 shows a formwork construction method according to the present invention.

The formwork construction method includes a lower horizontal bar 3, a vertical bar 4, which is made of a shape material having a roughly lip groove-like cross section, and which constitutes the framework 2.
and a connecting fitting 7 that connects the upper horizontal bar 5 and the lower horizontal bar 3 or the upper horizontal bar 5 and the vertical bar 4, and a wire mesh 16 that is removably attached to the inside of the framework 2;
is used.

The connecting fittings 7 are shown in Fig. 6 (or Fig. 7).
As shown in FIG.
is attached with a shaft pin 12, and at the left and right ends of the vertical part 11 are clamping pieces 1 that protrude horizontally in a bifurcated manner.
5 and 15 are formed.

As shown in FIG. 1, a plurality of vertical bars 4 are erected at regular intervals on the lip part 14 of the lower horizontal bar 3, and the lip part 14 is in contact with the upper end of the vertical bar 4. The upper horizontal beam 5 is arranged at.

The lower horizontal bar 3 or the upper horizontal bar 4 are connected by a connecting fitting 7, and in this case, the lip portions 14, 14 of the upper and lower horizontal bars 3, 5 are connected to the horizontal portion 10 and the clamping piece 13, as shown in FIG. The lip portion 1 of the vertical beam 4
4 and 14 are clamping pieces 15 formed on the horizontal portion 11,
15.

The frameworks 2 constructed in this manner are installed facing each other as shown in FIG. 1, and a wire mesh 16 is attached as a formwork inside the frameworks 2.

Then, concrete is placed between the frames 2 and 2.

After the concrete hardens, the framework 2 is removed and the wire mesh 16 is buried.

(Example) The present invention will be described below with reference to an illustrative example.

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

Frame assemblies 2, 2 are assembled facing each other at required intervals on a concrete foundation 1 made of cast-in-place concrete. The frame assembly 2 includes a lower horizontal beam 3, a vertical beam 4, and an upper horizontal beam 5.
It consists of The lower horizontal beam 3 is laid on the concrete foundation 1 and fixed onto the concrete foundation 1 with a plurality of fixing hardware 6. The vertical bars 4 are erected on the lower horizontal bar 3 at regular intervals in the longitudinal direction of the lower horizontal bar 3, and are connected to the lower horizontal bar 3 by connecting fittings 7 shown in FIGS. 6 and 7. The upper horizontal bar 5 is disposed astride between the vertical bars 4, 4, and is connected to the vertical bars 4, 4 by connecting fittings 7, respectively.

The lower horizontal bar 3, the vertical bar 4, and the upper horizontal bar 5 are metal shapes having a substantially lip groove shape in cross section.

The fixed hardware 6 is formed of an angle material in the illustrated embodiment, and is fixed to the concrete foundation 1 with nails or screws 9, and the lower horizontal beam 3 is removably supported by the fixed hardware 6.

The connecting fitting 7 is formed into a substantially L-shape by a horizontal portion 10 and a vertical portion 11, and a shaft pin 12 is passed through the approximately central portion of the horizontal portion 10 from above.
A clamping plate 13 is rotatably fixed to the penetrating portion of 2. The connecting fitting 7 is connected to the lip portion 1 of the upper and lower horizontal bars 3 and 5 by the horizontal portion 10 and the clamping plate 13.
4 and 14 are sandwiched and fixed to the upper and lower horizontal bars 3 and 5, respectively. In addition, clamping pieces 15, 15 that protrude into two in the horizontal direction are formed at the left and right edges of the vertical part 11 along the vertical direction of the vertical part 11, and the connecting fitting 7 is connected to the vertical crosspiece 4 by the clamping plates 15, 15. lip portion 14,
14 is clamped and fixed to the vertical beam 4.

After completing the assembly of frames 2, 2,
A wire mesh 16 is removably attached to the inside of the housing using a locking tool 8 or the like.

For the wire mesh 16, metal lath, wire lath, ribbon lath, or the like is used.

In the illustrated embodiment, a protruding piece formed on the inside of the horizontal bars 3, 5 or the vertical bar 4 is used as the locking tool 8, but it is not necessary to form it on the inside of the bar.
Hooks, bolts, etc. may also be used.

Moreover, a spacer is attached between the frame assemblies 2 and 2 as necessary.

When pasting of wire mesh 16 is completed, wire mesh 1
Reinforcing bars 17 are placed inside the walls 6 and 16, and then concrete is poured.

When the poured concrete has developed a certain level of strength, the frameworks 2 and 2 are removed. If necessary, a finishing material such as mortar is applied to the surface of the wire mesh 16.

In addition to the illustrated embodiment, it is also possible to construct only one side using the formwork construction method of the present invention and construct the remaining sides using conventional wooden or metal weir plates.

(Effects of the Invention) As described above, according to this construction method, the frame can be easily assembled by connecting the horizontal beam and the vertical beam with the connecting metal fittings, and wire mesh can be used as a formwork inside the frame. Since it can be pasted, formwork work can be simplified and labor-saving, and the construction period can be shortened.

Moreover, since the upper and lower horizontal bars and vertical bars that make up the framework can be used repeatedly, it is economically efficient.

Furthermore, since wire mesh is used as the formwork, it is easy to process and can be used for structures with complex shapes.

Furthermore, since the framework is removed and only the wire mesh is buried, if the finished surface is plastered, it is possible to prevent the finished part from peeling off.

[Brief explanation of the drawing]

Figure 1 is a partial perspective view of the assembled frame, Figure 2 is its plan view, Figure 3 is a perspective view showing the connection between the lower horizontal beam and the vertical beam, and Figures 4 and 5 are the top and bottom. A partial perspective view of the horizontal beam and the vertical beam, and FIGS. 6 and 7 are perspective views of the connecting fittings. 1... Concrete foundation, 2... Frame, 3...
Lower horizontal bar, 4... Vertical bar, 5... Upper horizontal bar, 6...
Fixed hardware, 7... Connecting metal fittings, 8... Locking tools, 9...
...Nails and screws, 10...Horizontal part, 11...Vertical part,
12... Axis pin, 13... Holding plate, 14... Lip portion, 15... Holding piece, 16... Wire mesh, 17...
...reinforced steel.

Claims (1)

[Scope of Claims] 1. A lower horizontal bar 3, a vertical bar 4, and an upper horizontal bar 5, which are made of a profile member with a substantially lip groove shape in cross section, and constitute the framework 2.
A horizontal part 10 and a vertical part 11 form a substantially L-shape, and a clamping plate 13 is attached to the horizontal part 10 with a shaft pin 12, and a bifurcated horizontal part is provided at the left and right ends of the vertical part 11. A connecting metal fitting 7 in which protruding clamping pieces 15, 15 are formed and connects the lower horizontal beam 3 or the upper horizontal beam 5 and the vertical beam 4, and a wire mesh 16 that is releasably attached to the inside of the framework 2. A plurality of vertical bars 4 are erected at regular intervals on the lip part 14 of the lower vertical bar 3, and the upper horizontal bar 5 is arranged so that the lip part 14 is in contact with the upper end of the vertical bar 4. The lip parts 14, 14 of the upper and lower horizontal bars 3, 5 are held between the horizontal part 10 and the clamping plate 13, and the lip parts 14, 14 of the vertical bar 4 are held by the clamping piece 1 formed on the vertical part 11.
5 and 15, and connect the lower horizontal beam 3 or the upper horizontal beam 5 and the vertical beam 4 with the connecting fittings 7 to form a pair of frameworks 2, 2, and the inside of the framework 2 as a formwork. A concrete formwork construction method characterized by pasting wire mesh 16, pouring concrete between frames 2, 2, and removing said frames 2 after the concrete hardens.