JPH09235875A - Form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a form for concrete capable of installing a resin sheet easily and repeatedly without damaging the form. SOLUTION: This form is installed so as to repeatedly connect and disconnect a resin sheet 1 having a soft projection 1a to and from a concrete deposited surface of a formwork main body 5 by a base sheet 6. Thereby, the base sheet 6 is firmly installed on the formwork main body 5 by a pressure sentive adhesive, an adhesive, etc. Thereafter, the resin sheet 1 is adhered on this base sheet 6 free to peel off several times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used for pouring wall concrete, and more particularly to a mold suitably used for constructing a wall surface to be tiled.

[0002]

2. Description of the Related Art Conventionally, in order to form a tile wall surface, uncured concrete is first poured into a formwork and then removed from the mold to construct a concrete wall. Then, the base mortar is applied to the wall surface of the concrete wall, and the tile with the attached mortar on the back is pressed against the base mortar. It is also practiced to omit the base mortar and directly attach the tiles to the concrete wall using only the adhesive mortar.

In such a conventional method of constructing a concrete wall, the wall surface of the concrete wall to be formed has a flat finished surface as the inner surface of the formwork. For this reason, the adhesive force between the wall surface of the concrete wall and the base mortar or the attached mortar tends to be low.

[0004] In order to solve such problems,
Japanese Patent Application Laid-Open No. 4-357268 describes a method for placing wall concrete in which the resin sheet 1 having the soft projections 1a as shown in FIG. 4 is attached to the inner surface of the mold.

When the resin sheet 1 is attached to the inner surface of the mold 2 as shown in FIGS. 5 (a) and 5 (b), a concave hole 4 derived from the projection 1a is formed on the surface of the concrete wall 3. .

[0006] The concrete wall having such irregularities has little variation in the bonding strength with the mortar, and when the tile is attached with the base mortar or the attached mortar, the tile is prevented from falling off.

In particular, when the soft protrusion receives pressure from the uncured concrete and spreads into a thick flat shape as shown in FIG. 5 (a), when the uncured concrete hardens in this state,
As shown in FIG. 5 (b), the concave hole 4 on the surface of the concrete wall 3 after demolding has a narrow entrance, which increases the reliability of mortar adhesion.

[0008]

[Patent Document 1] Japanese Patent Application Laid-Open No. 4-35726
In the publication No. 8, a tacker or a double-sided tape is adopted as a means for attaching the resin sheet 1 to the mold 2 (paragraph 0024 of the publication).

When the resin sheet is attached to the mold by such a tacker or double-sided tape, the following problems may occur.

In the case of attaching with a tucker, there is a problem that after the mold is removed from the mold, the pin of the tucker remains in the mold, which damages the mold and the number of times the mold can be used repeatedly decreases.

In the case of attaching with a tucker, if the attachment of the end portion of the resin sheet becomes rough, the resin sheet does not adhere to the formwork, so the resin sheet bites into the concrete during concrete pouring and cannot be removed cleanly. there were.

In the case of attaching with a double-sided tape, if the double-sided tape has a strong adhesive force, it is difficult to remove the tape from the mold after demolding, so that there is a problem when the mold is repeatedly used. . Moreover, when the adhesive force of the double-sided tape is weak, there is a problem that the resin sheet is easily detached during concrete pouring. In addition, if the concrete is attached to the formwork or dust is attached to the formwork, the adhesive force of the tape is weakened.

According to the present invention, the resin sheet can be easily repeatedly attached to the frame without damaging the frame, and the resin sheet can be prevented from biting into the concrete.
An object is to provide a concrete pouring formwork capable of producing a good concrete surface.

[0014]

The formwork of the present invention is a formwork for concrete pouring, in which a resin sheet having soft protrusions is attached to the surface of the formwork body, by means of an adhering material that can be detached multiple times. The sheet is attached to the formwork main body.

In the present invention, it is preferable that the adhering material is attached to the mold body, and the resin sheet can repeat the adhering and peeling a plurality of times with respect to the adhering material.

When concrete is poured using such a formwork, as in the case of JP-A-4-357268,
You can build a concrete wall with concave holes on the surface.

In this formwork, the resin sheet can be repeatedly attached to and detached from the formwork body, and when a force is applied to the formwork such that it is peeled off from the concrete surface to remove the formwork, the formwork body and the resin form are removed. The sheet is peeled off, the mold body is first demolded, and only the resin sheet remains on the concrete surface. That is, this adhesive material has a strong resistance to the deviation in the direction parallel to the resin sheet. However, since the adhesive force against the force in the direction perpendicular to the sheet is not very strong, it peels off between the adhesive material and the resin sheet during demolding, and the resin sheet remains on the concrete side due to the meshing of the protrusions on the surface. .

This resin sheet can also play the role of curing concrete. By pulling this resin sheet from one end side so as to be folded back along the concrete surface, the resin sheet can be peeled off without damaging the edge of the concave hole on the concrete surface.

The demolded frame body can be used for the next concrete pouring by newly attaching a resin sheet thereto. In addition, when the peeled resin sheet itself is not scratched, the resin sheet can be reattached to the mold body and reused for concrete pouring.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. 1A and 1B show a mold according to an embodiment, wherein FIG. 1A is a perspective view, FIG. 1B is a perspective view of a mold body, and FIG. 1C is CC of FIG. It is sectional drawing which follows the line.

In this mold, a resin sheet 1 having soft projections 1a is attached to a concrete placing surface of a mold body 5 by a base sheet 6 so as to be repeatedly removable. The base sheet 6 is firmly attached to the mold body 5 with an adhesive, an adhesive, a double-sided tape, a tacker, or the like. The base sheet 6 is soft and the surface of the base sheet 6 is in close contact with the resin sheet.

The resin sheet 1 is held by the mold body 5 by being in close contact with the base sheet 6. The adhesive force between the resin sheet 1 and the base sheet 6 is much smaller than the joining force between the base sheet 6 and the mold body 5.

When concrete is poured using the formwork constructed as described above, as shown in FIG. 2 (a), a concave hole 4 is formed on the surface of the concrete wall 3 as in the conventional case (FIG. 5). Is formed.

After the concrete is hardened, if the mold body 5 is to be peeled off from the concrete wall 3 in order to remove it,
The mold body 5 and the resin sheet 1 are separated, only the mold body 5 is demolded, and the resin sheet 1 remains on the surface of the concrete wall 3 as shown in FIG. 5 (b). Therefore, after the concrete curing period ends, the resin sheet 1 is peeled off by pulling the resin sheet 1 from one end thereof so as to be folded back along the surface of the concrete wall 3.

When the peeled resin sheet 1 has no tucker holes or shreds, the mold body 5 is used as it is.
It can also be pasted on and used for the next concrete placement.

In the formwork of FIG. 1, the resin sheet 1 is provided only on the surface of the formwork body 5, and the base sheet 6 is provided on the four peripheral edges of the surface of the formwork body 5. 3A resin sheet 1A having a flat portion 1b as shown in FIG.
In this case, the base sheet 6 may be provided only on the side end surface of the form body 5 as shown in FIG. 3 (b). As shown in FIG. 3C, the base sheet 6 may be provided not only on the side end surface of the mold body 5 but also on the edge portion of the surface of the mold body 5.
Of course, the base sheet 6 may be attached to the entire surface of the mold body 5 as shown in FIG.

As the base sheet 6, those commercially available under the names of "self-adhesive sheet" or "adhesive sheet" are suitable. In addition to the sticking member of the type in which the surface of the base sheet 6 is flat like a mirror surface, it is also possible to use a base sheet having a crater-like surface and configured to play the role of a suction cup. it can.

[0028]

As described above, according to the mold of the present invention, it is possible to construct a concrete wall having a large number of concave holes on the surface. Since this formwork is less likely to be damaged even if it is used repeatedly, there is an effect that the number of times the formwork is used is increased.

[Brief description of drawings]

FIG. 1 is a perspective view and a cross-sectional view showing the configuration of a mold according to an embodiment.

FIG. 2 is a cross-sectional view showing a method for constructing a concrete wall using the formwork according to the embodiment.

FIG. 3 is a perspective view showing a configuration of a mold according to another embodiment.

FIG. 4 is a perspective view of a resin sheet.

FIG. 5 (a) is a sectional view showing a method for constructing a concrete wall using a conventional mold with a resin sheet, and FIG.
The figure is a cross-sectional view of a concrete wall constructed using the mold.

FIG. 6 is a perspective view showing still another embodiment.

[Explanation of symbols]

 1 Resin Sheet 1a Protrusion 2 Formwork 3 Concrete Wall 4 Recessed Hole 5 Formwork Body 6 Base Sheet

Claims (2)

[Claims] 1. A formwork for concrete pouring, in which a resin sheet having soft projections is attached to the surface of the formwork body, wherein the sheet is attached to the formwork body by an adhesive material that can be detached multiple times. And formwork. 2. The adhesive material according to claim 1, wherein the adhesive material is attached to the mold body, and the resin sheet is capable of repeating adhesion and peeling a plurality of times with respect to the adhesive material. Formwork.