JPH0752885Y2 - Formwork equipment for concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a formwork used in forming a concrete structure.

[Prior Art] In general, there are two types of concrete formwork, such as a plywood plate that is removed after the concrete is hardened, and a metal mesh that is not removed even after the concrete is hardened.

The former plate-shaped formwork has a good finish on the concrete surface,
It is used when the exterior is directly applied to the place where it is visible to the eyes or the concrete surface. However, while the finish is good, the material is bulky and it takes time to bring it to the construction site,
In addition, there is a drawback that it takes a lot of time to perform the above-mentioned processing, assembling, dismantling and the like.

The latter metal mesh formwork differs from the plate-shaped one,
It will not be removed even after the concrete has hardened,
It is used for the foundation of structures, etc., which are usually buried in the ground and are not visible to the eye, although the surface has irregular irregularities and the finish is poor.

However, even in the case of a single structure, when the lower half, which is the foundation part, is buried in the ground and the upper half is exposed above the ground, the former plate-shaped form was used in all cases.

[Problems to be solved by the invention] In such a case, since the base part that is buried in the ground and does not require good surface finish is formed by the wooden board formwork, the formwork of this base part is removed. However, there was a problem that if the wooden formwork was embedded as it was, it would become a white source.

An object of the present invention is to obtain a formwork device in which a mesh formwork is used for a part buried in the ground and a plate-like formwork is used for an exposed part on the ground.

[Means for Solving the Problems] The present invention has been made in order to solve the above problems, and in a concrete casting form made of a metal mesh, the form of the metal mesh is used. Is separably coupled to at least two, and a plate-shaped inner formwork is attached to the inner side of one metal mesh formwork. When the formwork is dismantled after hardening of concrete, the inner formwork and the metal parts outside thereof are made. The mesh formwork can be separated and removed.

[Operation] For example, the base part of a structure that is buried in the ground and is invisible is left as a metal mesh formwork, and inside the metal mesh formwork that is exposed to the ground and exposed Attach the inner formwork to form the concrete structure. After the concrete is hardened, the metal mesh formwork of the part to which the inner formwork is attached is removed from the structure together with the inner formwork, and only this part is finished and shaped well.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 and 4.

FIG. 1 is a cross-sectional view of the mold, and for convenience of drawing, the upper and lower molds (4) and (2) are each represented by one solid line.
Actually, as shown in the side view of FIG. 3, it has a metal mesh shape and has V-shaped cross-section ribs at predetermined intervals.

This formwork is lower than the chain line (L) in FIG. 1 and is a lower formwork (2) that forms the foundation part (1) buried in the ground, and is above the chain line (L) and exposed to the ground. A separate body from the upper formwork (4) forming the upper part (3) is used. Among these upper and lower formwork (4) and (2), the upper formwork (4) is dismantled after hardening of concrete. Sometimes separated and removed, the lower formwork (2) is polymerized together at the ends so that it is filled as it is. Specifically, as shown in FIG. 2, the lower formwork (2) is arranged so that the ribs (5U) at the lower end of the upper formwork (4) are on the outside.
It is overlapped with the rib (5L) at the lower end of the and is sandwiched and connected between the vertical pipe (6) and the rib washer (7).

This connecting method will be described in more detail. Lower formwork (2)
The width is fixed by a rod-shaped separator (8). That is, as shown in FIG. 2, a separator (8) having both ends threaded is used, and a rib washer (7) is screwed to the threaded portion of the separator (8) to form a lower mold (2). The bottom of the separator (8) while applying it from the inside of the lower mold (2)
Pass through the mesh. Further, form ties (registered trademark) (9) are screwed onto the both ends of the separator (8) from the outside of the lower mold (2). Round pipes (6) are applied to the outside of the lower mold form (2) at regular intervals in the vertical direction, and the horizontal pipes (6) are attached thereto.
While holding the vertical and horizontal round pipes (6) and (6) by the metal fittings (10), the wedge (12) is driven into the hole (11) provided in the foam tie (9), Tighten the retaining bracket (10). Then, the lower formwork (2) is sandwiched between the round pipes (6) (6) and the rib washer (7). Thus, the upper and lower molds (4) on both ends of the separator (8)
(2) is held by washers (7), round pipes (6) and (6), foam ties (9) and wedges (12), and fixed to a predetermined width.

Further, only the inner side of the upper mold (4) is fixed by inserting an inner mold (13) such as a plywood plate, a plastic plate, a corrugated board or a thin iron plate for shaping the concrete surface. Inner formwork (1
To fix 3) to the upper mold (4), see Fig. 4 (a).
There are various methods as shown in (b), (c) and (d). Of these, (a) has a method of striking the V-shaped tucker (14) across the mesh and driving it into the plywood (13).
(B) is a method of adhesively fixing the adhesive tape (16), (c) is a method of fixing with an adhesive (17), and (d) is a peg-shaped tack (15) with a plywood board. It is a method of driving in (13), and it may be fixed by any method.

In addition, when the height of the inner mold (13) is about 300 mm or less, a separator for fixing the width is not particularly necessary, but when it is more than this, a hole is opened in the inner mold (13) to The width is fixed like the separator (8).

In the above embodiment, the upper mold (4) and the lower mold (2) are attached by superposing them on the ribs (5U) (5L), respectively, but the connection method can be easily separated after the concrete is hardened. If so, it is not limited to this.

[Effects of the Invention] As described above, the present invention configures the entire formwork with a mesh formwork that is easy to construct, and provides the plate-shaped inner formwork inside the mesh formwork only at the necessary portions. As a result, there is an effect that it is possible to install only the necessary parts in a good finish without undue labor required for installing, assembling and dismantling the formwork.

[Brief description of drawings]

FIG. 1 shows an embodiment of a formwork apparatus according to the present invention. FIG. 1 is a sectional view of a concrete formwork, FIG. 2 is an enlarged sectional view of a connecting portion, and FIG. 3 is a side view of FIG. Figure 4 (a)
(B) (c) (d) is explanatory drawing which shows the fixing method of an inner formwork. (1) ... Foundation part, (2) ... Lower formwork, (3) ... Upper part,
(4) ... Upper formwork, (5) (5U) (5L) ... Ribs, (6) ...
Pipe, (7) ... rib washer, (8) ... separator,
(9) ... Foam tie (registered trademark), (10) ... Holding metal fitting, (11) ... Hole, (12) ... Wedge, (13) ... Inner mold, (1
4) ... tucker, (15) ... tack, (16) ... adhesive tape, (1
7) ... adhesive.

Claims (2)

[Scope of utility model registration request] 1. A concrete casting form made of a metal mesh, wherein the metal mesh forms are separably coupled to each other, and a plate is provided inside one of the metal mesh forms. The inner formwork of the shape is attached,
A formwork device for a concrete structure, wherein an inner formwork and a metal mesh formwork outside thereof can be separated and removed when the formwork is dismantled after the concrete is hardened. 2. A metal mesh formwork for mounting an inner formwork is formed separately from other metal mesh formwork, and these end portions are partially polymerized to assemble the formwork, When the frame is dismantled, the inner formwork and the metal mesh formwork outside it are separated and removed from the other metal mesh formwork, and the other metal mesh formwork is left as a part of the concrete structure. The mold device for a concrete structure according to claim 1.