JPH0154502B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a concrete formwork into which base materials such as foamed plastic board insulation material and ALC board used in architectural concrete work are simultaneously poured.

Taking conventional foamed plastic board insulation as an example, as shown in Fig. 1, a plywood panel 2 that can withstand the lateral pressure of concrete during pouring of ready-mixed concrete is provided on the outside of the foamed plastic board insulation 1, and these panels are placed vertically. It is normal to tighten with a fastener 4 through a cross member 3a and a horizontal member 3b, and the foamed plastic board insulation material 1 shown in FIG. 1, or a plastic board, paper board, cloth board, or inorganic silicic acid calcium plate,
Since base materials such as ALC boards have low bending strength, only the outer plywood panel 2 was designed to receive lateral pressure during pouring of ready-mixed concrete.

However, the above-mentioned plywood panel 2 is made by nailing a wooden stile around the periphery of a plywood board of a predetermined size and a padding in the longitudinal direction of the center.Although not shown in FIG. As the concrete leaked from the joints of the inner base material adheres firmly to the inner surface of the plywood panel 2, the life of the plywood panel 2 will be shortened due to damage to the plywood panel 2 when demolding. Labor was required to transport and clean the concrete.

The present invention has been made in view of the above-mentioned circumstances, and when a base material is simultaneously implanted on at least one side, a panel in which a welded wire mesh is stretched on the inside of a quadrilateral frame made of shaped steel is arranged on the outside of the base material. The opposing steel molds were inserted between the opposing mold steels of the adjacent panels, and the opposing mold steels were integrally connected to the formwork on the opposite side using clamping hardware, and the metal mesh was placed on the outside of the wire mesh stretched over the frame. The structure is such that the formwork on both sides is assembled with clamping hardware via a seat plate, and unlike conventional methods, it does not use a large number of batten materials, is repurposed less frequently, requires cleaning after use, and is heavy and difficult to transport. The purpose of this project is to provide concrete formwork that does not use panels made of plywood or metal plates that are subject to stress.

The present invention will be explained in detail below based on the accompanying drawings. In the drawings, parts corresponding to those in the conventional example are given the same reference numerals, and explanations of those parts will be omitted.

Figure 2 is a front view of a concrete formwork showing an embodiment of the present invention, Figure 3A is a cross-sectional view taken along line A-A in Figure 2, Figure 3B is a partially enlarged view of Figure 3A, and Figure 3B is a partially enlarged view of Figure 3B. Figure 4 is a sectional view taken along the line B-B in Figure 2, Figure 5 A is a longitudinal sectional view showing how the welded wire mesh is attached to the frame, Figure 5 B is a front view of the same, and Figures 5 C and 2 are I. , B is a plan view of the wire mesh mounting piece shown in FIGS. 6A and 6B, and FIGS. This shows the parts.

In Figures 2 to 3 A and B, 5 is a gusset plate 5c at the four corners of the vertical side 5a and horizontal side 5b of the shaped steel.
The frame 5 is assembled into a quadrilateral shape, and is tightened with bolts and nuts 5d so that it can be disassembled and reassembled. 6 is a welded wire mesh, 7 is a base material such as a plastic board, a foamed plastic board, a paper board, a cloth board, an inorganic calcium silicate board, an ALC board, etc., which are poured simultaneously when concrete 8 is poured. Reference numeral 9 denotes a fastening hardware, which is composed of a form tie 9b (registered trademark) and a separator 9c, and is tightened through a seat plate 9a placed outside the welded wire mesh 6 stretched inside the frame 5 during formwork assembly, as shown in FIG. This is to tighten the welded wire meshes 6, 6 on both sides as shown in FIG. Furthermore, as shown in FIG. 4, 10 is inserted between the opposing vertical sides 5a, 5a of adjacent panels 11, 11 (the one in which welded wire mesh 6 is stretched inside the quadrilateral frame 5 is referred to as panel 11). This is a fastening hardware for connecting the opposing vertical sides 5a, 5a together with the opposite panel 11 with a washer 10a, and the fastening shown in FIGS. 2 to 3 A and B. It has the same configuration as hardware 9. In FIGS. 2 and 3, the panels 11 are arranged horizontally, but if the height is high, the panels 11 are also arranged vertically,
Similarly to the vertical sides 5a, 5a, the horizontal sides 5b, not shown,
5b, and the opposing horizontal sides 5b, 5b are integrated with a washer 10a, and connected to the opposite panel 11 with a fastener 10 (not shown).

In the present invention, the panel 11 in which the welded wire mesh 6 is stretched inside the frame 5 and the base material 7 inside the panel 11 are collectively referred to as a formwork.

In order to form the panel 11 by stretching the welded wire mesh 6 inside the frame 5 described above, the steps shown in FIGS. Figure 5 shows
Attach the frame side wire mesh mounting piece 12a to the vertical side 5a and horizontal side 5b of the frame 5, and then hook the tip of the wire mesh side mounting piece 12b to the wire mesh 6, and attach the wire mesh side wire mesh to the cotter hole 12d of the frame side wire mesh mounting piece 12a. The wire mesh is stretched over the frame 5 by aligning the bolt holes 12e of the pieces 12b and inserting the bolts 12c. The reason why a plurality of star holes 12d and 12e are drilled is the star hole 12d and 12e.
This is because by changing the alignment position, the welded wire mesh 6 can be stretched over the frame 5 without loosening. In FIG. 6, a fixed welded wire mesh piece 6a is welded to the vertical side 5a of the frame 5, and a fixed welded wire mesh piece 6b is fixed to the horizontal side 5b by welding 6c, respectively, and the welded wire mesh 6 is fixed to the fixed welded wire mesh pieces 6a and 6b. It is tightened with iron wire 6d.

Fig. 2 to Fig. 4 show the case where the structure of the concrete formwork of the present invention is implemented on both sides.
The structure of the concrete formwork of the present invention may be implemented on one side of the formwork, and the other side may have a structure in which ordinary weir boards (plywood panels) and flaps are combined, without simultaneous casting of base material.

To assemble the formwork of the present invention, first, as shown in FIG. 5 or 6, welded wire mesh 6 is stretched over frame 5 assembled by tightening vertical sides 5a and lateral sides 5b with gusset plates 5c. Next, the base material 7 is arranged inside the panel 11, and the formwork on both sides is assembled with the fastening hardware 9 via the seat plate 9a arranged on the outside of the welded wire mesh 6. Furthermore, it is inserted between the opposing mold steels (vertical sides 5a, 5a and horizontal sides 5b, 5b) of the adjacent panels 11, and the opposing mold steels are integrated with a washer 10a and assembled with the opposite formwork and the clamping hardware 10. wear. Concrete 8 is poured into the formwork assembled in this way.

In the concrete formwork of the present invention constructed as described above, the bending deformation of the base material 7, which has low bending strength when used alone, is supported by the welded wire mesh 6 on the outside of the base material 7. Withstand bending,
The welded wire mesh 6 is assembled to each other with the fastening hardware 9 via the seat plate 9a arranged on the outside so as to maintain the flat plate shape, and the opposing mold steels (vertical sides 5a, 5a and horizontal sides) of the adjacent panels 11 are The fitting precision of the entire formwork is maintained by inserting it between the sides 5b, 5b) and assembling the opposed steel molds together with the formwork on the opposite side using the clamping hardware 10 using a washer 10a. This structure eliminates the need for vertical batten materials.

As explained in detail above, according to the concrete formwork of the present invention, demolding is easy, the conventional work of transporting shedding boards and cleaning and maintenance of used shedding boards can be omitted, and insulation materials and ALC When surface finishing of base materials such as timber is required, wire mesh can be used for mortar or
Since it serves as the base for GRC construction, it is possible to simplify the process. Conventional sheathing boards and panels can be used only a few times and have a short lifespan, but with the present invention, expensive shedding boards and panels can be used. Since no batten material is used, it is possible to reduce costs.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional formwork in which foamed plastic board insulation material is simultaneously cast, Fig. 2 is a front view of a concrete formwork showing an embodiment of the present invention, and Fig. 3A is a line A-A in Fig. 2. Line sectional view, Figure 3B is a partially enlarged view of Figure 3A, Figure 4 is a sectional view taken along line B-B in Figure 2, and Figure 5A is a vertical cross-section showing how the welded wire mesh is attached to the frame. Fig. 5B is a front view of the same, Fig. 5C and D are plan views of the wire mesh mounting pieces shown in A and B, and Figs. It is a sectional view and a front view showing an attached state, and (b) shows a part of the upper left corner as seen from the inside. 1...Foamed plastic board insulation material, 2...Plywood panel, 3...Flat material, 4...Fastening hardware, 5...
...Frame, 5a...Vertical side, 5b...Horizontal side, 5c
... Gusset plate, 5d ... Bolt/nut, 6 ... Welded wire mesh, 7 ... Base material, 8 ... Concrete, 9, 10 ... Fastening hardware, 9a ... Seat plate, 9b ... Form tie, 9c ...Separator, 10a...Washer, 11...Panel.

Claims (1)

[Claims] 1. As formwork on at least one side, use plastic boards, foamed plastic boards, paper boards, cloth boards, etc., which have low bending strength and cannot normally be used as shedding boards for concrete formwork, in the part that contacts the concrete.
A base material such as an inorganic calcium silicate board or an ALC board is placed, and a panel with a welded wire mesh is placed inside a quadrilateral frame whose four sides are made of shaped steel on the outside, and the adjacent panel The opposite mold steels are inserted through the space between the opposing mold steels using a washer and connected to the opposite mold frame as one body using clamping hardware, and both sides are connected through seat plates placed on the outside of the wire mesh stretched over the frame. A concrete formwork characterized by assembling the formwork with clamping hardware.