JPH0412924Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to formwork plates used in concrete construction.

(Prior technology) For the construction of simple concrete structures such as cloth foundations and legal frames, lightweight and inexpensive paper molds made of paper boards such as cardboard that have been treated to make them waterproof and reinforced are used instead of conventional plywood boards and metal forms. Frame boards have come to be used more and more.

(Problem that the invention aims to solve) However, even if paper formwork boards are water-resistant and reinforced, they are weaker than wooden or metal formwork boards, so the formwork In this process, it is necessary to use a lot of reinforcing materials such as bata wood, and there are drawbacks such as troublesome formwork construction, and in particular, the periphery is damaged during transportation and construction work and becomes unusable. It also has the disadvantage of being inferior in durability.

The present invention improves the drawbacks of paper formwork boards as described above, and is a simple material for fabric foundations, legal frames, etc. that is lightweight, has excellent strength and durability, and can be produced at low cost, mainly using corrugated paperboard. It is an object of the present invention to provide a form board suitable for constructing concrete structures.

(Means for solving the problems) Regarding the configuration of the present invention, the first
2, the present invention has reinforcing rods 2, 3 with a chevron-shaped cross section spaced apart vertically on one side of a substrate 1 made of cardboard paper treated to strengthen water resistance. At the same time, a covering plate 4 made of corrugated paper similar to that of the substrate 1 is attached to the outer surface of the substrate 1 and each of the reinforcing rods 2 and 3 to form a chevron-shaped protruding strip body 5 along the reinforcing rods 2 and 3. . This is a characteristic feature.

(Example) Hereinafter, an example of the concrete form board according to the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a board made of corrugated paperboard, which has a structure in which a corrugated paper core material 1b is sandwiched between two sheets of paperboard 1a and 1a and bonded together.
Generally, it is formed into a rectangular shape. This substrate 1 has been subjected to water resistance and strengthening treatment.

2 and 3 are reinforcing rods made of metal or plastic arranged at the upper and lower parts of one side of the board 1;
Protrusions 2a and 3a each having a chevron-shaped cross section
and base plate parts 2b, 3b connected to the ends thereof, and are fixed to the substrate 1 via the base plate parts 2b, 3b with an adhesive or the like.

In addition, 4 is a covering plate attached to one side of the substrate 1, and like the substrate 1, it is made of water-resistant corrugated paper board which is glued by sandwiching a corrugated paper core material 4b between two paper boards 4a, 4a. , has been strengthened. The covering plate 4 is adhered to one surface of the substrate 1 and the outer surface of each reinforcing rod 2, 3 with an adhesive or the like, and has a chevron-shaped protrusion along the protruding portions 2a, 3a of each reinforcing rod 2, 3. 5 and 6 are formed.

A plurality of separator insertion holes 7, 7 are provided at the tops of the protrusions 5, 6 at intervals in the longitudinal direction of the cover plate 4 and the protrusions 2a, 3 of the reinforcing rods 2, 3, respectively.
Wedge insertion holes 8, 8 are also formed in the substrate 1 at positions opposite to the insertion holes 7, 7.

In the embodiment shown in the drawings, the substrate 1 and the covering plate 4 are formed by folding a single cardboard board in half, but the substrate 1 and the covering plate may be formed separately. .

Next, an example of construction using the formwork plates of the present invention will be explained. As shown in Fig. 3, a pair of formwork plates A, A of the present invention are placed facing each other at a predetermined interval, and separators B and wedges are They are bonded to each other using C. Separator B has horizontal bars 9, 9 and vertical bars 10, 1.
It is formed by connecting the horizontal rods 9
Enlarged heads 11, 11 are provided at both ends of the frame plate A to project outward from the insertion holes 7, 8 of the form plate A, and a locking piece that engages with the inner surface of the form plate A is provided at the inner position of the enlarged heads 11, 11. 1
2 and 12 are protruded, and the horizontal rods 9 and 9 are
Clamping bodies 13, 13 for engaging reinforcing bars 14 are provided at required positions in the intermediate portion.

Therefore, a separator B is arranged between a pair of formwork plates A, A, and the ends of the horizontal bars 9, 9 are inserted into the insertion holes 7,
8, the formwork plates A, A are fixed to the locking pieces 12, 12, and a forked shape is formed between the enlarged heads 11, 11 of the horizontal rods 9, 9 and the outer surface of the formwork plates A, A. By inserting and engaging the wedges C, the pair of formwork plates A, A are joined with a predetermined distance maintained. Then, after placing reinforcing bars 14, 14 between the formwork plates A and A and fixing them to the respective clamping bodies 13, 13 of the separators B, B, concrete D is poured between the formworks A and A. It is. After the poured concrete D has hardened, the wedge C is removed and the form plates A, A are peeled off and removed from the concrete D. As shown in FIG. A structure with a protruding end will be constructed. and,
The protruding ends of the horizontal rods 9, 9 can be broken off from the end face of the concrete D by hitting them with a hammer or the like, as shown by the chain lines in the figure.

(Effects of the invention) As explained above, the formwork board of the invention has reinforcing rods with a chevron-shaped cross section arranged vertically at intervals on one side of the substrate formed of cardboard paper treated to strengthen water resistance. At the same time, a covering plate made of corrugated paper similar to that of the substrate is attached to the outer surface of the substrate and each reinforcing rod to form a chevron-shaped protrusion along the reinforcing rod, and the longitudinal direction of the protrusion is At intervals,
It has a structure with horizontal separator insertion holes that pass through the board from the top of the protrusion, so: (1) Since it is mainly made of corrugated paperboard that has been treated to be water-resistant and reinforced, it is lightweight and easy to handle and transport. In addition, since reinforcing rods are built into the upper and lower parts, the formwork plate has sufficient strength and rigidity to withstand the lateral pressure of concrete.

(2) Since the reinforcing rods are built-in, there is no need to use horizontal or vertical flaps like in conventional formwork, which simplifies the structure of the formwork and allows for efficient construction.

(3) It has a simple structure, low material cost, is suitable for mass production, can be manufactured at low cost, and can be disposable.

It has many advantages such as, and is suitable as a form board for constructing simple concrete structures such as frames and cloth foundations.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the form plate of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a longitudinal cross-sectional view showing the construction state using the form plate, and Fig. 4 is the concrete that has been constructed. FIG. 3 is a vertical cross-sectional view showing the structure. 1... Board, 2, 3... Reinforcement rod, 4... Covering plate, 5, 6... Projection body, 7, 8... Separator insertion hole, A... Form board, B... Separator, C ……
Wedge, D... concrete.

Claims (1)

[Scope of utility model registration request] Reinforcing rods with a chevron-shaped cross section are arranged vertically at intervals on one side of a substrate made of cardboard that has been treated to strengthen water resistance, and a covering plate made of cardboard similar to that of the substrate is attached to the substrate and each reinforcement. Horizontal separators attached to the outer surface of the rod to form chevron-shaped protrusions along the reinforcing rod, and passing through the top of the protrusions into the substrate at intervals in the longitudinal direction of the protrusions. A concrete form board characterized by having insertion holes.