JPH02274966A - Form for latticeform slab and form assembling method employing same form - Google Patents

Abstract

PURPOSE:To perform assembly of forms with high efficiency by a method wherein forms are previously contained in a form removing cover and securely disposed on plywood. CONSTITUTION:An inwardly folded fixing part 5 is placed to the peripheral edge of a form removing cover 1. Form pieces 2a and 2b formed with division pieces into which e given form is divided are contained in the form removing cover through the medium of a spacer 3a. Forms F are placed on plywood 6 in a manner to form the forms in the desired shape of a lattice. The fixing part 5 of the form removing cover 1 is secured on plywood 10 by using crosspieces 7 and nails 8. Concrete is placed thereon for curing. After completion of curing of concrete, the spacer 3a is first removed, and the form pieces 2a and 2b and the form removing cover 1 are removed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a formwork structure for lattice slabs and a method of constructing a formwork using the formwork, and more specifically, to a formwork structure with a clean appearance without wrinkles on the surface. In addition to providing a slab, it also provides an efficient method for constructing formwork.

[Prior Art] In concrete buildings and the like, slabs with lattice-like reinforcing lips are formed in order to reduce the thickness of floors, ceilings, etc. and to improve their strength, rigidity, etc. In order to make this slab with reinforcing ribs, for example, Fig. 10 (A), (
As shown in B), plywood (
21) is installed horizontally, a formwork (22) is fixed on top of this plywood (21), the surface of this formwork (22) is covered with a demolding cover (23), and from above After the concrete etc. is poured and the concrete hardens, the formwork (2
2) and the cover (23) are removed.

[Problem that the invention seeks to solve]

However, in the above method, the cover (23) is attached to the formwork (22) placed on the plywood (21), but it is impossible to attach it manually without wrinkles. Therefore, wrinkles are inevitably generated in the applied cover (23), and these wrinkles are transferred as they are to the slab surface formed by such a cover application form, resulting in a loss of appearance. .

[Means for solving problems]

In view of this situation, the present inventors conducted extensive research and found that the above problems could be solved at once by storing the formwork in the cover in advance, and completed the present invention.

That is, the first aspect of the present invention is a formwork for a lattice-like slab that is formed by storing a formwork in advance in a demolding cover, and the second aspect of the present invention is a formwork for a lattice slab that is formed by storing a formwork in advance in a demolding cover, and then Each content is a method of constructing a formwork, which is characterized by arranging and fixing the obtained formwork for storage inside a demolding cover on plywood or the like.

[Example] To explain the present invention based on the drawings, Fig. 1 is a sectional view showing an embodiment of the formwork of the present invention, in which the formwork (2) is housed in the demolding cover (1). .

2 and 3 show other embodiments of the formwork of the present invention, with FIG. 2 being a sectional view and FIG. 3 being a top view. In these figures, the mold of the present invention has mold pieces (2a) and (2b) housed in a demolding cover (1) via a spacer (3).

The material for the mold or mold pieces is not particularly limited, but a foamed synthetic resin molded product such as a polystyrene resin is preferred from the viewpoint of light weight and workability.

The formwork piece consists of a plurality of divided pieces of a predetermined formwork, and preferably consists of 2 to 4 divided pieces.

If there are too many divided pieces, assembly work using spacers becomes complicated and takes time and effort.

There are no particular restrictions on the spacer, but it is preferable that the height of the spacer ranges from 1/3 of the height of the formwork piece to the same height as the formwork piece, and the width of the spacer ranges from 1/2 of the formwork piece to the same height as the formwork piece. It is preferable that the spacer has the same width as the spacer.By making the spacer tapered, it is possible to easily prevent the demolding cover from wrinkling by driving the spacer into a wedge-like shape between the mold pieces. Further, it is preferable to provide a retaining part on the lower part of the spacer, which can be gripped or hooked with a tool to facilitate removal during demolding. The material of the spacer is not particularly limited, and examples include metal, plastic, plastic foam, and wood. Further, the demolding cover is not particularly limited, but it is preferable that the size is the same as the navy blue, width, and height of the formwork or the combination of the formwork piece and the spacer, or smaller within the range of up to 3M. Further, as the material, materials with excellent mold releasability such as polypropylene, polyethylene, and polyester are suitable.

For the formwork of the present invention, it is effective to store the formwork or formwork pieces with the opening of the demolding cover facing upward, as if stuffed into a bag. In particular, in the case of formwork pieces, the formwork pieces are first stored in the demolding cover, and then a wedge is inserted between the formwork pieces to create a wrinkle-free formwork. can be obtained easily.

FIGS. 4 and 5 show still another embodiment of the formwork of the present invention, in which spacers (3a), (3
b), (3c), (3d) to formwork pieces (2a), (
2b), (2c), and (2d) are stored.

FIG. 6 shows another embodiment of the formwork according to the invention, with spacers (3a) (and (3b), (3c) not shown)
A retaining part (4) is provided at the bottom of (3d)), and a fixing part (5) is folded inward around the periphery of the formwork cover (1).
is provided.

Figure 7 shows the formwork piece (2a) in the formwork shown in Figure 6.
), (2b) have a tapered contact surface with the spacer (3a), and the spacer (3a) also has a tapered shape.
It shows a structure in which a fixing part (5) is provided and further extends outward.

FIG. 8 shows still another embodiment B of the formwork of the present invention, in which two tapered spacers (3a'), (3a') are used; in this case, the formwork pieces (2a), (3a') are used. There is no need to make the contact surface with the spacer in 2b) into a tapered shape,
Therefore, there is an advantage that there is no need to use a special molding machine.

A method for constructing a formwork structure for a lattice slab using the formwork of the present invention will be explained based on FIG. 9. For example, the formwork (F) shown in FIG. Place the fixing part (5) of the demolding cover (1) on the plywood (6).
are fixed on the plywood (10) using crosspieces (7) and nails (8), concrete is poured on top of this, and after hardening, first spacers (3a) (and (3b, not shown)
) to (3d)) are removed, and then formwork pieces (2a) and (
2b) (and although not shown, (2C), (2d)
) and remove the demolding cover (1).

[Action/Effect]

As mentioned above, according to the present invention, the formwork is not fixed on the plywood as in the conventional method, so the formwork or mold is placed inside the demolding cover, just like storing the contents in a bag. The frame pieces and spacers can be stored, so even if wrinkles occur during the storage process, they can be easily removed. In the case of formwork pieces, the formwork pieces are first stored in the demolding cover, and then a spacer is inserted between the formwork pieces in a wedge-like manner to push the formwork pieces apart. Since the spacer is attached while the demolding cover is being pushed open, wrinkles can be completely prevented.

In addition, the construction work is extremely efficient, as the formwork can be constructed simply by transporting the wrinkle-free formwork to the site and arranging and fixing it on the plywood as described above.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the formwork of the present invention, FIG.
Fig. 3 shows another embodiment of the formwork of the present invention, Fig. 2 is a sectional view, Fig. 3 is a top view, and Figs. 4 and 5 show still other embodiments of the formwork of the present invention. , FIG. 4 is a sectional view, FIG. 5 is a top view, FIGS. 6 to 8 are sectional views showing further embodiments of the formwork of the present invention, and FIG. 9 is a construction of the formwork of the present invention. Schematic diagram for explaining the method, Figures 10 (A) and (B)
10 is a schematic diagram showing a method of forming a lattice slab, and FIG.
A) is a perspective view, and FIG. 10(B) is a sectional view. 1... Mold removal cover 2... Formwork 2a, 2b, 2
c, 2d...Formwork piece 3a 4...6...8...22...3a', 3a'...Spacer engagement part, plywood, nail, -Formwork, 5, 7, 21・23・3b. C ・Fixed parts・Structures・Plywood・Canoe dl! Figure 1

Claims (1)

[Claims] 1. A formwork for a lattice-shaped slab, which is formed by storing the formwork in advance in a demolding cover. 2. The formwork according to claim 1, wherein the formwork consists of formwork pieces divided into 2 to 4 pieces. 3. The formwork according to claim 2, wherein the formwork pieces are assembled by spacers. 4. The formwork according to claim 3, wherein the spacer has a tapered shape. 5. The formwork according to claim 1, 2 or 3, wherein the size of the demolding cover is the same as the size of the formwork or the union of the formwork piece and the spacer, or smaller by up to 3 mm. 6. A method for constructing a formwork, which comprises storing the formwork in advance in a demolding cover, and then arranging and fixing the obtained formwork stored in the demolding cover on plywood or the like.