JP2018150785A - Formwork fixing material (separator cap) - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing method for formwork capable of easily being conducted in the construction placing concrete and filler with formworks.SOLUTION: A formwork fixing material is used to fix a form plate onto a separator provided detachably on an anchor that is fixed to a construction reference surface by a predetermined interval, while holding an interval between the construction reference surface and the finishing surface. The formwork fixing material is provided by inserting the separator thereinto and made of a cylindrical resin material foam, and its length can be adjusted by appropriate cutting means at the time of the construction so as to able to correspond when the interval between the construction reference surface and the finishing surface is not a constant. In addition, it is preferable to use the form construction method by the formwork fixing material.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a member for fixing a formwork material for small-scale concrete placement.

Conventionally, as a formwork for placing concrete on a wall or the like, a pair of P-con (registered trademark, the same applies hereinafter) at intervals equivalent to the thickness of the concrete to be placed on a connecting rod having a threaded portion called a separator on both ends. A formwork plate (face plate) is installed by screwing a fastener called, inserting a separator from both sides, and called a frame tie (registered trademark, the same applies hereinafter) together with a frame material called a reinforcing end material There is a method of fixing with a clamp. (For example, see Reference 1)
In addition, as an example of using an existing wall surface, an anchor is attached to the construction wall surface as a formwork for concrete thickening work for seismic reinforcement of walls, etc., or for cross-section repair work for removing and repairing deteriorated concrete parts. There is a method of fixing, attaching a separator and P-con, fixing a face plate through the separator, and fixing a reinforcing frame material with a foam tie. (For example, see Reference 2)

  The above-mentioned cross-section repair work removes concrete parts that have deteriorated beyond the allowable limit due to bean plates, cold joints, neutralization, salt damage, frost damage, etc., and repairs the cross-section of epoxy resin mortar, polymer cement, etc. It is a work to restore the original cross-sectional dimensions with the material, and as the construction method, plastering method in which the restoration material is applied and filled with a plastering iron, then the cross-sectional restoration part is closed with a mold and filled with a grout pump There is a grout method, and a spraying method with a spraying machine. In cross-section repair work, there are many cases of repairing small-scale scattered concrete degrading parts, and plastering methods are often adopted in terms of workability and cost.

  In the plastering method, a high-fluidity restoration material, which is mixed with water and mixed with polymer cement, is applied and filled with a plastering iron, but when repairing the wall or bottom of the housing, if the restoration cross section is thick, the restoration material It is a thin and repetitive coating operation, and once it is applied, it takes a curing time until the layer becomes self-supporting to some extent and the next layer can be applied. Also, the painting work requires high skill as a plasterer, and requires time and effort.

JP 2002-327533 A (FIG. 4) Japanese Patent Laid-Open No. 10-220028 (representative diagram)

Reference 1 states that “a front square plate (2A), a back plate (3), a rebar mesh plate (4), a washer 5), P-con (6), and fastening rod (7) ".
Reference 2 describes the concrete wall thickening method as follows: “Anchor holes drilled at appropriate intervals in the existing concrete wall…. After attaching the separator and assembling the formwork, the foam tie is connected to the separator. Then, the mold is clamped and the concrete is placed between the existing concrete wall and the mold ".

In FIG. 1, the example in the case of constructing the cross-section repair construction using a formwork using the conventional technique shown by literature 1 and literature 2 is shown. (A) is a cross-sectional view at the anchor position showing the foundation in the formwork, (b) is a front view of (a), (c) is a cross-sectional view at the anchor position showing the formwork structure, (d) is ( It is a front view of c).
The cross-section repair work may be composed of anchor 10, separator 20, P-con 30, face plate 40, vertical end thick material 31, horizontal end thick material 32, foam tie 24, nut, etc., but as shown in the figure The entire construction site for restoration work will be built at once.
In the case of thicker construction, there is no rigging work to remove deteriorated concrete as in the case of cross-section repair work, and the anchor fixing part is an existing wall surface, and the ceiling above the formwork that becomes the filler inlet F The filler can be charged with no obstacles other than the surface.
Other than this, it is the same as the cross-section repair work, and when the filling material is placed only at the top of the mold and the vertical dimension is long, insufficient filling such as cavities will not occur in the repaired part and the increased thickness part. Therefore, there is a problem that it takes time and labor for filling work for both thickening work and cross-section repair work.

Further, in the cross-sectional repair work, the surface obtained by removing the deteriorated concrete by the work is an uneven surface or an inclined surface. When the anchor 10 is fixed with this surface as the construction reference surface C, the distance from the finished surface A is increased. There are many cases in which the dimensions are not uniform and the dimensions are about 3 to 5 cm, and there is a problem that it is difficult to use P-con in the conventional method.
The present invention aims to solve such problems.

In order to solve the above-described problems, the present invention provides a separator that is detachably provided on an anchor fixed to a construction reference plane at a predetermined interval in a construction in which concrete or a filler is cast using a mold. In addition, the mold plate 40 is used for the purpose of holding and fixing the interval between the construction reference surface and the finished surface, and is provided by interposing the separator, and is formed of a cylindrical resin material foam. In order to cope with the case where the interval between the finished surfaces is not uniform, the length can be appropriately adjusted by a cutting means at the time of construction.
Also, a formwork method using a formwork fixing material that is inserted through a separator detachably attached to an anchor fixed to the construction reference surface and fixes the formwork plate while maintaining a distance between the construction reference surface and the finish surface; It is preferable to do this.

Sepacap 50 of the present invention is a moderately weak strength because it is made of a resin foam, and can be adjusted by cutting the length of Sepacap 50 on site with an appropriate cutting means such as a knife during construction. Even if the gap between the construction reference surface and the finished surface is not uniform, it is possible to cope with it, and the mounting of the face plate becomes easy.
Further, the separator cap 50 is used on the separator to isolate the filler, and even after the filler is cured, the separator cap 50 has a moderately weak strength as described above. You can unscrew it and remove it. After removing the separator, the residue can be appropriately cleaned with a tool. In this way, the mold assembly and disassembly can be easily and time-reduced.

It is explanatory drawing of conventional construction method formwork construction. (A) is sectional drawing which shows the foundation in a formwork, (b) is a front view of (a), (c) is sectional drawing which shows a formwork structure, (d) is a front view of (c). It is explanatory drawing of the formwork construction of this invention. (A) is sectional drawing which shows the foundation in a formwork, (b) is a front view of (a), (c) is sectional drawing which shows a formwork structure, (d) is a front view of (c). It is explanatory drawing which shows the basic part of a conventional construction method in a cross section. It is explanatory drawing which shows the base part of the separator cap of this invention in a cross section.

An embodiment of the present invention will be described in detail with reference to FIGS.
As shown in FIG. 2, the mold of the present invention includes an anchor 10, a separator 20, a face plate 40, a separator cap 50, a vertical end thick member 31, a horizontal end thick member 32, a home tie 33, and a separator nut 21.
As shown in FIG. 2, the anchor 10 is fixed at a predetermined interval to the restoration reference plane C after the concrete removal of the deteriorated portion is completed, and the separator 20 is detachably attached with the screw portion, and the separator cap 50 is attached to the separator 20 To do.
Next, the face plate 40 having a hole penetrating the separator 20 is brought into contact with the separator cap 50 and attached. Next, the foam tie 33 is attached to the separator, and the vertical end thick member 31 and the horizontal end thick member 32 are fastened and fixed by the mounting separator nut 21 to complete the formwork assembly.

  As shown in FIG. 3, the separator cap 50 of the present invention has a cylindrical shape having an inner diameter larger than the outer diameter of the separator 20 and is slidable in the axial direction of the separator 20. The material and shape are rigid enough to withstand the pressure when assembling the formwork in the axial direction. As an example, a foam of a resin material is preferable because it can be easily cut with a knife or the like and has a high compressive strength.

Next, an example of the formwork construction method in the cross-section repair work using the separator cap 50 will be described.
The anchor 10 is drilled and fixed at a predetermined interval on the repair reference plane C from which the deteriorated portion of the concrete has been removed, and the separator 20 is detachably attached by a screw portion, and the separator 20 is inserted by being inserted into the separator 20. .
Next, the face plate 40 is brought into contact with the separation cap 50 so as to be at the position of the repair surface A. However, the repair reference surface C has irregularities and inclinations due to curling and the distance to the repair surface A is large. It is not constant. Then, it cut | disconnects by appropriate cutting means, such as a knife, so that the edge part of the separator cap 50 may correspond to the position corresponded to the restoration surface A.
Next, the face plate 40 having a hole penetrating through the separator 20 is put in contact with the separator cap 50 and attached. The foam tie 33 is attached to the separator, and the vertical end thick member 31 and the horizontal end thick member 32 are attached and tightened with the separation nut 21, and these are fixed to the separator together with the face plate 40 to complete the frame assembly.

Next, the restoration material is charged and filled, and the mold is disassembled after the curing filler is cured.
In the case of a conventional formwork, the separator is embedded with a cured restoration material.
On the other hand, in the case of the present invention, the separator is isolated from the repair material cured by the separator cap, and the separator cap has an appropriate weak strength. Therefore, the separator is forcibly anchored even after the repair material is cured. It can be detached from the screw part. After this, the separator cap residue is removed with a dedicated tool and the holes are cleaned.
After the mold is removed from the mold, the protruding funnel portion J is scraped off as shown in FIG.

  As described above, by using a sepa cap for formwork in cross-section repair work, construction can be performed more easily than the conventional formwork assembly method using P-con, and material costs and labor can be reduced. .

DESCRIPTION OF SYMBOLS 1 Section repair form 10 Anchor 20 Separator 21 Separator nut 31 Vertical end thick material 32 Horizontal end thick material 33 Home tie 40 Face plate 50 Sepacap SB1 Spacing distance from construction reference plane (separ cap cutting dimension)
SB2 Separator cutting dimension A Finishing surface C Construction reference plane J Protrusion I Sepacap box opening

Claims (2)

In the construction of placing concrete and filler using formwork,
Used for the purpose of fixing the mold plate 40 while maintaining the interval between the construction reference surface and the finished surface on the separator detachably provided on the anchor fixed to the construction reference surface at a predetermined interval.
Provided by interposing the separator;
It is cylindrical and consists of a foam of resin material.
It is possible to handle when the interval between the construction reference surface and the finish surface is not uniform.
A mold fixing material characterized in that the length can be appropriately adjusted by cutting means during construction. In the construction of placing concrete and filler using formwork,
It is inserted through a separator that is detachably attached to an anchor fixed to the construction reference plane,
The formwork method using the formwork fixing material according to claim 1, wherein the formwork plate is fixed while maintaining a distance between the construction reference surface and the finished surface.

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