JP2023126964A - Form unit and construction method of concrete structure - Google Patents

Abstract

To provide a form unit not needed to be removed, for concrete placing without using a form timbering.SOLUTION: A frame unit for placing concrete without using a form timbering has a buried panel 10, a connection member 20, a first fixture 30, a flange 23, and a second fixture 40. The connection member 20 has a separator part 21 and a male screw part 22 provided to one end thereof. The second fixture 40 has a head part 41 and a male screw part 42, the buried panel 10 has a hole 13 allowing penetration of the male screw part 42 of the second fixture 40, the first fixture 30 is a protrusion member having an end face 31 for buried panel rear face abutting, and has the male screw part 22 of the connection member 20 and a female screw part 33 screwed with the male screw part 42 of the second fixture 40. A sum of an abutting area of the flange 23 to a buried panel surface 12, and an abutting area of the first fixture 30 to a buried panel rear face 11 is 2% or more of the one surface area of the buried panel 10.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a formwork unit that does not require removal for performing concrete pouring without using formwork support, and a concrete structure construction method using the formwork unit.

In the process of constructing a concrete structure by pouring concrete, the formwork used to demarcate the area filled with concrete raw materials is made up of multiple panels (hereinafter sometimes referred to as "removable panels") that are removed from the concrete structure after construction. It is often formed by assembling sheets. Techniques regarding such formwork for placing concrete are described, for example, in Patent Documents 1 to 3 below.

Japanese Patent Application Publication No. 7-279410 Japanese Patent Application Publication No. 2004-183466 JP2012-224990A

For example, when the concrete structure to be formed has a stepped structure, the removable panel that defines the side wall surface of the stepped structure needs to be removed after the concrete structure is constructed. (In other words, the removable panel is assembled in such a manner that there is a predetermined distance between the lower end of the removable panel and the floor surface.)

However, when concrete is poured with the removable panel assembled in this manner, partial leakage of unhardened concrete from the gap between the removable panel and the floor surface occurs, that is, it protrudes. Then, as the protruding concrete hardens, an extra sloping part is formed compared to the intended corner shape, and in order to form an appropriate corner shape, the extra part must be scraped off (chilling work). ) will be required. In addition, repair work may be required for the scraped area. The necessity of such work is undesirable because it increases the work, time, and cost required for constructing the concrete structure with stepped portions.

Furthermore, from the viewpoint of streamlining the panel removal work after construction of a concrete structure, the assembly of the removable panel may be simplified. In this case, the removable panel is likely to be distorted due to the weight and load (for example, impact load) of the flowing concrete raw material filled in the section formed by the formwork. If the assembled removable panel is distorted, the resulting concrete structure will also be distorted. Concrete structures with such distortion need to be repaired, and the necessity of such repairs is undesirable because it increases the work, time, and cost required for constructing the concrete structure.

In addition, removed panels need to be cleaned in order to be reused, but cleaning is time-consuming and generates a large amount of sewage. Furthermore, panels that cannot be reused even after cleaning are discarded, and a large amount of industrial waste is generated after construction of a concrete structure, which is another problem.

On the other hand, when forming a concrete structure without using the above-mentioned removable panel, mortar is generally applied with a trowel or the like. If mortar is applied to a surface other than the upward surface using a trowel, etc., applying the mortar thickly at once may cause peeling, so apply it thinly and let the mortar harden to a certain extent, then reapply until the desired thickness is reached. A method of coating up to However, this method is not preferable because it increases the work, time, and cost required for constructing the concrete structure. Another problem is that even after the mortar has hardened, it is likely to peel off, especially from side walls of walls and downward surfaces such as ceilings and bottom surfaces of beams, which may cause them to collapse due to earthquakes or the like.

The present disclosure was devised under these circumstances, and its purpose is to provide a formwork unit that does not require removal, for pouring concrete without using formwork support. It is in.
Another object of the present disclosure is to provide an assembled formwork unit that does not require removal and is used for pouring concrete without using formwork supports.
Another object of the present disclosure is to provide a method for constructing a concrete structure using the assembled formwork unit.
Another object of the present disclosure is to provide a method of repairing a concrete structure using the assembled formwork unit.

In order to solve the above problems, the present disclosure provides a formwork unit for pouring concrete without using formwork support, comprising:
A buried panel, a connecting member, a first fixture, a collar, and a second fixture,
The connecting member has a separator part and a male thread part provided at one end of the separator part,
The second fixture has a head and a male thread,
The buried panel has a hole through which the male threaded portion of the second fixture can pass,
The collar has a hole through which the male threaded portion of the second fixture can pass, and an end surface for contacting the buried panel surface,
The first fixture is a convex member having an end surface for contacting the back surface of the buried panel, and the first fixture is a convex member that is screwed into the shaft portion of the convex member with the male threaded portion of the connecting member and the male threaded portion of the second fixture. has a threaded part,
The total of the contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 2% or more of the surface area of one side of the buried panel,
Provides formwork units for concrete pouring.

The present disclosure also provides that the total of the contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 5% or more of the surface area of one side of the buried panel,
The formwork unit is a formwork unit that forms a formwork for concrete pouring by assembling a plurality of buried panels in series in a height direction so as to be flush with each other.

The present disclosure also provides the formwork unit that includes a second fixture with a flange that has a flange-shaped head and a male thread in place of the flange and the second fixture.

The present disclosure also provides the formwork unit, wherein the embedded panel has a longitudinal dimension of 2000 mm or less, a lateral dimension of 1000 mm or less, and a thickness of 15 mm or less.

The present disclosure also provides that the buried panel has a thickness of 15 mm or less,
The formwork unit is a formwork unit that forms a formwork for concrete pouring by assembling a plurality of embedded panels in series in the height direction in a flush manner to form a formwork for concrete pouring.

The present disclosure also provides the formwork unit, wherein the surface of the buried panel that is installed toward the inside of the concrete-filled section includes an adhesion-improved surface.

The present disclosure also provides the formwork unit further comprising a connecting tool for connecting two adjacent embedded panels in series in a flush manner.

The present disclosure also provides the formwork unit further comprising a connecting tool for connecting two adjacent buried panels in series orthogonally to each other.

The present disclosure also provides the formwork unit further comprising a height adjuster for adjusting the height position of the embedded panel.

The present disclosure also provides the formwork unit, which is a formwork unit for pouring concrete structures having a step structure of 1 m or less.

The present disclosure also provides an assembled formwork unit for forming a formwork for pouring concrete without using formwork support, comprising:
A buried panel, a connecting member, a first fixture, a collar, and a second fixture,
The connecting member has a separator part and a male thread part provided at one end of the separator part,
The second fixture has a head and a male thread,
The buried panel has a hole through which the male threaded portion of the second fixture can pass,
The collar has a hole through which the male threaded portion of the second fixture can pass, and an end surface for contacting the buried panel surface,
The first fixture is a convex member having an end surface for contacting the back surface of the buried panel, and the first fixture is a convex member that is screwed into the shaft portion of the convex member with the male threaded portion of the connecting member and the male threaded portion of the second fixture. has a threaded part,
The total contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 2% or more of the surface area of one side of the buried panel,
The male threaded part of the second fixture is inserted into the hole of the buried panel from the front side of the buried panel with the collar in between, and the male threaded part of the second fixture that protrudes from the back side of the buried panel and the connecting member. To provide an assembled formwork unit in which a male threaded part of the panel is screwed to a female threaded part of a first fixture whose end surface is brought into contact with the back surface of an embedded panel.

The present disclosure also provides a method for constructing a concrete structure by pouring concrete using the prefabricated formwork unit, the method comprising:
Step 1 of arranging the prefabricated formwork unit so that the front side of the buried panel of the prefabricated formwork unit forms at least one surface of the concrete structure to define a section to be filled with concrete raw materials;
Step 2 of fixing the assembled formwork unit by connecting the end of the separator part of the arranged assembled formwork unit with a non-movable part located inside the concrete filling section to form a formwork;
A concrete structure construction method is provided, which includes a step 3 of supplying a concrete raw material into the formed formwork.

The present disclosure also provides the concrete structure construction method, wherein the concrete structure is a concrete structure having a step structure of 1 m or less.

The present disclosure also provides the method for constructing a concrete structure, wherein the concrete structure is at least one structure made of concrete selected from stairs, rising steps, thresholds, and beams.

The present disclosure also provides a method for renovating a concrete structure by pouring concrete using the prefabricated formwork unit, the method comprising:
Step 1' of forming a formwork by fixing the end of the separator part of the assembled formwork unit to the surface to be repaired of the concrete structure;
A method for renovating a concrete structure is provided, which includes a step 2' of supplying a concrete raw material into the formed formwork.

The present disclosure also provides a concrete structure, wherein the buried panel included in the formwork unit forms at least one surface selected from a top surface, a bottom surface, and a side surface of the concrete structure.

In the formwork unit of the present disclosure, the connection between the buried panel and the connection member is reinforced by a collar or the like, so it can withstand the weight and loads (such as impact loads) of concrete raw materials without using formwork supports. A durable formwork can be formed. If the formwork unit of the present disclosure is used, the work, time, and cost required for constructing a concrete structure can be reduced, and concrete structures that are strong and aesthetically pleasing can be created with simple and speedy operation. can be formed.

Furthermore, by using the formwork unit of the present disclosure, it is possible to stop or reduce the amount of panels that are removed after construction and become industrial waste. Therefore, by using the formwork unit of the present disclosure, it is also possible to reduce the environmental load.

For example, when the concrete structure to be formed is a ceiling or the like, conventional construction methods have problems such as peeling and collapse, but the concrete structure obtained using the formwork unit of the present disclosure The buried panels that make up at least part of the surface of the concrete structure are firmly fixed to the foundation and the steel frames that form the framework, preventing parts of the concrete structure from peeling off or collapsing. It is possible to dramatically improve earthquake resistance.

If a concrete structure is repaired using the formwork unit of the present disclosure, the surface to be repaired of the concrete structure can be easily, speedily, and beautifully repaired. Furthermore, excellent earthquake resistance can be imparted to the concrete structure after renovation.

It is a perspective view showing an example of formwork unit X of this indication. It is a figure showing the variation of the buried panel of this indication. FIG. 3 is a perspective view showing another example of the formwork unit X of the present disclosure. FIG. 3 is a perspective view showing an example of a second fixture of the present disclosure. They are a perspective view (a) and a cross-sectional view (b) showing an example of a fixture 30 of the present disclosure. FIG. 7 represents a variation of the buried panel of the present disclosure. FIG. 7 represents a variation of the buried panel of the present disclosure. It is a sectional view showing an example of an assembled formwork unit of the present disclosure. It is a sectional view showing another example of an assembled formwork unit of the present disclosure. It is a sectional view showing another example of an assembled formwork unit of the present disclosure. FIG. 2 is a schematic diagram illustrating an example of a method for assembling assembled formwork units in the method for constructing a concrete structure of the present disclosure. FIG. 7 is a schematic diagram (side view) showing another example of the method for assembling the prefabricated formwork unit in the method for constructing a concrete structure of the present disclosure. FIG. 13 is a top view of an example of how the assembled formwork unit shown in FIG. 12 is assembled. FIG. 7 is a schematic diagram (side view) showing another example of the method for assembling the prefabricated formwork unit in the method for constructing a concrete structure of the present disclosure. FIG. 7 is a schematic diagram showing another example of the method for assembling the assembled formwork unit in the concrete structure repair method of the present disclosure. It is a figure explaining the assembly formwork unit concerning Embodiment 2. It is a figure explaining the assembly formwork unit concerning Embodiment 2. FIG. 3 is a diagram illustrating a concrete structure constructed using an assembly formwork unit according to a second embodiment. FIG. 3 is a diagram showing a formwork unit according to a second embodiment. FIG. 3 is a schematic perspective view of the first embedded panel according to Embodiment 2, viewed from the back side. FIG. 3 is a schematic perspective view of a second embedded panel according to Embodiment 2, viewed from the back side. FIG. 3 is a schematic perspective view of a third buried panel according to Embodiment 2, viewed from the back side. FIG. 3 is a schematic perspective view of an auxiliary member according to a second embodiment. It is a figure which illustrates the procedure of the concrete placing process based on Embodiment 2.

[Formwork unit]
The formwork unit X of the present disclosure is a formwork unit for pouring concrete without using formwork support, and includes:
Comprising an embedded panel 10, a connecting member 20, a first fixture 30, a collar 23, and a second fixture 40,
The connecting member 20 has a separator part 21 and a male thread part 22 provided at one end of the separator part 21,
The second fixture 40 has a head 41 and a male threaded portion 42,
The buried panel 10 has a hole 13 through which the male threaded portion 42 of the second fixture 40 can pass,
The collar 23 has a hole 24 through which the male threaded portion 42 of the second fixture 40 can pass, and an end surface 23A for contacting the surface of the embedded panel 10.
The first fixture 30 is a convex member having an end face 31 for contacting the back surface of the buried panel 10, and the male threaded portion 22 of the connecting member 20 and the second fixture 40 are attached to the shaft portion of the convex member. It has a female threaded portion 33 that screws into the male threaded portion 42,
The total of the contact area of the collar 23 to the surface of the buried panel and the contact area of the first fixture 30 to the back surface of the buried panel is 2% or more of the surface area of one side of the buried panel.

The assembled formwork unit X is an assembled formwork unit Y.

The formwork unit It is suitable as a formwork unit for forming a formwork.

(Buried panel 10)
The buried panel 10 is a weir plate (formwork placed in direct contact with concrete) that forms the shape of a concrete structure, and after the concrete raw material has hardened, it remains at least part of the concrete structure without being removed. This is a member that forms the part.

The embedded panel 10 is a rectangular plate material having a surface 11 and a surface 12 opposite thereto. As raw materials for the buried panel 10, for example, inorganic materials such as thermoplastic resins, thermosetting resins, metals, cement, and ceramics; wood, paper materials, and laminated materials and mixed materials thereof can be selected. In particular, in the case of a step structure with a height of 1 m or less (including, for example, a step structure for a unit bath or a step structure for water return), it is required to be lightweight, so in addition to thermoplastic resin plates, thin fibers are used. A reinforced cement board, a laminated material board of wood and thermosetting resin such as a plywood board, a lightweight metal board such as an aluminum board, etc. can be used. When disposing of buried panels 10 that are no longer needed during demolition or repair work of concrete structures, biodegradable plastic boards that can be expected to have the effect of reducing environmental impact can also be used. In this embodiment, it is a flat fiber-reinforced cement board.

The lengthwise dimension of the buried panel 10 is, for example, 300 to 2420 mm,
The widthwise dimension is, for example, 20 to 2420 mm. Among these, from the viewpoint of suppressing the manufacturing cost and transportation cost of the buried panel 10 and ease of assembling the buried panel 10, the longitudinal dimension is preferably 300 to 2000 mm, and the transverse dimension is 20 mm. ~1000mm (particularly 50~600mm) is preferred.

In this specification, when assembling the buried panels 10 to form a formwork for concrete pouring, the surface installed toward the inside of the concrete filling section 80 is referred to as the surface 11, and the outside of the concrete filling section 80 is referred to as the surface 11. The surface installed toward the surface is defined as surface 12.

Examples of the flat fiber-reinforced cement board include slate board, calcium silicate board, and slag gypsum board. Slate board contains, for example, cement, fibers (excluding asbestos), and admixtures as main raw materials. The calcium silicate board contains, as main raw materials, for example, calcareous raw materials, silicic raw materials, fibers (excluding asbestos), and admixtures. Slag gypsum board contains, for example, slag, gypsum, fibers (excluding asbestos), and admixtures as main raw materials. The standards for these fiber-reinforced cement boards are defined in JIS A 5430. From the viewpoint of water resistance, the fiber-reinforced cement board is preferably a slate board or a calcium silicate board. Further, as a commercially available slate board, for example, "Selflex" manufactured by A&A Materials Co., Ltd. can be mentioned. As a commercially available calcium silicate plate, for example, "Hilac M" manufactured by A&A Materials Co., Ltd. can be mentioned. A commercially available slag gypsum board includes, for example, "Tiger Board" manufactured by Yoshino Gypsum Co., Ltd.

The thickness of the embedded panel 10 is, for example, 2 mm or more, preferably 3 mm or more, more preferably 4 mm or more, particularly preferably 5 mm or more, and most preferably 6 mm or more. Such a configuration is preferable from the viewpoint of ensuring the strength of the buried panel 10, and in turn suppresses damage and deflection of the buried panel 10 during transportation and assembly work of the buried panel 10, and during concrete pouring. Yes, it is preferable. Further, the thickness of the buried panel 10 is, for example, 15 mm or less, preferably 12 mm or less, more preferably 10 mm or less, even more preferably 9 mm or less, particularly preferably 8 mm or less, and most preferably 7 mm or less. Such a configuration is preferable from the viewpoint of reducing the weight of the buried panel 10, and is further preferable from the viewpoint of suppressing the manufacturing cost and transportation cost of the buried panel 10, and making it easier to assemble the buried panel 10.

When used in a step structure with a height of 1 m or less (including, for example, a step structure for a unit bath or a step structure for water return), it is preferable that the embedded panel be thin because it is lightweight and easy to transport.

When using a fiber-reinforced cement board as the buried panel 10, and when using it for a stepped structure with a height of 1 m or less (for example, including a stepped structure for a unit bath or a stepped structure for water return), the thickness of the buried panel 10 is 3 mm to 10 mm is preferred, and 5 mm to 8 mm is particularly preferred.

The weight per 1 m ² of the buried panel is, for example, 0.5 to 15 kg, preferably 1 to 12 kg, and more preferably 2 to 11 kg, in order to have both strength and lightness.

The buried panel 10 has a hole through which the male threaded portion 42 of the second fixture 40 passes, that is, a through hole 13 that penetrates between the surfaces 11 and 12 of the buried panel 10.

The number of through holes 13 that the buried panel 10 has is determined based on the size and shape of the buried panel 10, the stress applied to the buried panel 10 due to the weight and load of the concrete to be filled, and, for example, from 1 to The number is 20, preferably in the range of 1 to 10. Further, the through holes 13 may be provided in a line, at the four corners, at the four corners and the center, or in a zigzag pattern.

When using a fiber-reinforced cement board with a thickness of 3 mm to 10 mm for the embedded panel 10 in a step structure with a height of 1 m or less (for example, including a step structure for a unit bath or a step structure with water return), it is installed. The number of through holes 13 per 1 m ² of the buried panel 10 is preferably 10 to 10.
There are 50 pieces. The thinner the buried panel 10 is, the greater the number of through holes, which can reduce the work, time, and cost required for construction of a concrete structure, and the structure is strong and aesthetically pleasing due to simple and speedy operation. concrete structures can be formed.

When using a fiber-reinforced cement board with a thickness of 5 mm to 8 mm for the buried panel 10 to construct a unit bath step with a height of 200 mm, the number of through holes 13 per 1 m ² of the installed buried panel 10 is as follows. The number is preferably 10 to 30, more preferably 14 to 25, and even more preferably 16 to 22.

In addition, when using a fiber-reinforced cement board with a thickness of 5 mm to 8 mm for the buried panel 10 to construct a water return step with a height of 60 mm, the number of through holes 13 per 1 m ² of the buried panel 10 installed is preferably 30 to 50, more preferably 36 to 46.

The buried panel 10 is constructed so that the collar 23 is flush with the buried panel 10 when the formwork unit X is assembled or when a concrete structure is constructed using the assembled formwork unit Y. It may have a recess into which it can be inserted.

Surface 11 may be provided with an adhesion-improving surface over part or all of it. The adhesion-improved surface is, for example, a surface suitable for joining with concrete, and is a surface that has been treated to improve adhesion to concrete. By providing the adhesion-improved surface, the bond with the concrete can be strengthened, and the buried panel 10 can be prevented from peeling off from the concrete surface.

When used for a step structure with a height of 1 m or less (for example, including a step structure for a unit bath or a step structure with water return), the buried panel 10 protrudes from the top of the concrete surface after the poured concrete has hardened. It is necessary to shave/cut the upper edge with a sander or the like to match the height of the concrete surface. Therefore, it is not necessary to provide an improved adhesion surface in the upper region where the height of the buried panel is adjusted.

The adhesion-improving surface in the buried panel 10 (for example, the buried panel 10 which is a flat fiber-reinforced cement board) is, for example, the surface of a cured mortar layer, a roughened surface, a mechanically roughened surface, or a combination thereof. . From the viewpoint of mass production and economic efficiency of the buried panel 10, the surface of the cured mortar layer is preferable as the adhesion-improved surface of the buried panel 10.

The surface of the cured mortar layer in the buried panel 10 can be formed by applying mortar to the portion of the fiber-reinforced cement board mentioned above where the adhesion-improving surface is to be formed, and then hardening the mortar. Examples of the mortar include polymer cement mortar, epoxy resin mortar, and cationic mortar.

Polymer cement mortars are, for example, mortars that are mixtures of cement, fine aggregate, water, and polymer dispersions or re-emulsified powdered resins. Polymer dispersions include ethylene vinyl acetate resin (EVA) and acrylic resin. Commercially available ethylene vinyl acetate resins that can be used as polymer dispersions include, for example, "Celmity 10" manufactured by Daicel FineChem Co., Ltd. and "HOUN Sealer N" manufactured by Houn Co., Ltd. A commercially available acrylic resin that can be used as a polymer dispersion includes, for example, "Super Petroc 400" manufactured by Asahi Kasei Corporation.

A cationic mortar is, for example, a mortar that is a mixture of cement, fine aggregate, water, and a cationic polymer dispersion or a cationic reemulsifiable powder resin. Cationic polymer dispersions include cationic styrene-butadiene rubber and cationic acrylic resin. A commercially available cationic styrene-butadiene rubber that can be used as a cationic polymer dispersion includes "Celtal" manufactured by Daicel FineChem Co., Ltd. A commercially available cationic acrylic resin that can be used as a cationic polymer dispersion includes "Cell Cation" manufactured by Daicel FineChem Co., Ltd.

Epoxy resin mortar is, for example, a mortar that is a mixture of epoxy resin and fine aggregate. Examples of commercially available epoxy resin mortar include "K Mortar" manufactured by Konishi Co., Ltd.

Examples of the fine aggregate in the mortar include silica sand, river sand, obsidian pearlite, perlite, and calcium carbonate powder. The mortar may contain one type of fine aggregate or two or more types of fine aggregate.

When the adhesion-improved surface of the buried panel 10 is the surface of the cured mortar layer, the thickness of the cured mortar layer is preferably 0.5 mm or more, more preferably It is 1 mm or more, more preferably 1.5 mm or more. Further, from the viewpoint of reducing the weight and improving the workability of the buried panel 10, and from the viewpoint of suppressing the manufacturing cost and transportation cost of the buried panel 10, the thickness of the mortar cured material layer is preferably 10 mm or less, more preferably It is 5 mm or less, more preferably 3 mm or less.

When polymer cement mortar or cationic mortar is applied to a fiber-reinforced cement board, much of the moisture in the applied mortar is absorbed by the fiber-reinforced cement board, and the mortar tends to reach a so-called dry-out state. In dry-out mortar, the hydration reaction may be inhibited, resulting in poor curing or poor adhesion. In order to avoid such dryout, it is preferable to perform so-called water absorption adjustment on the fiber-reinforced cement board before applying mortar. Examples of the water absorption adjusting means include spraying water on the fiber reinforced cement board and applying a water absorption adjusting agent to the fiber reinforced cement board. Examples of the water absorption regulator include so-called water absorption regulators for coating with cement mortar, which are mainly composed of synthetic resin emulsions or polymer dispersions. Examples of the synthetic resin in such a water absorption regulator include acrylic resin, vinyl acetate resin, ethylene vinyl acetate resin, and synthetic rubber. Commercially available water absorption regulators for cement mortar coating include, for example, "Cell Mighty 10", "Cell Tite 10", "Celllock J", and "Cell Primer J" manufactured by Daicel Finechem Co., Ltd., and "Cell Primer J" manufactured by Houun Co., Ltd. HOUN Sealer N" (both contain ethylene vinyl acetate resin), and "Multi Primer" and "Peltas AC-300" manufactured by Showa Denko Kenzai Co., Ltd. (both contain acrylic resin). .

The above-mentioned uneven surface as the adhesion-improving surface in the buried panel 10 has a predetermined uneven shape on the surface in contact with the location where the adhesion-improving surface is to be formed, for example, in the process of manufacturing the fiber-reinforced cement board for forming the buried panel 10. It can be formed by press molding or extrusion molding a fiber reinforced cement board using a mold member such as a template.

The above-mentioned mechanically roughened surface as the adhesion-improved surface in the buried panel 10 is a mechanically roughened surface such as sanding or chipping on the planned location of the adhesion-improved surface of the fiber-reinforced cement board for forming the buried panel 10. It can be formed by roughening the area by roughening treatment.

The surface 12 of the embedded panel 10 may be provided with a decorative surface or the adhesion improving surface over a part or the entire surface thereof.

If a decorative surface is provided over part or all of the surface 12 of the buried panel 10, after the concrete structure is constructed using the formwork unit This is preferable from the viewpoint of work efficiency.

When the surface 12 of the buried panel 10 includes an adhesion-improved surface, it is suitable for performing a tiling operation on the adhesive-improved surface of the surface 12 of the buried panel after the construction.

The decorative surface is, for example, a smooth surface, a cured paint film surface, or a surface to which a decorative sheet is attached.

The smooth surface can be obtained by pressing the fiber-reinforced cement board using a mold member such as a template whose surface is smooth in contact with the area where the decorative surface is to be formed, for example, in the process of manufacturing the fiber-reinforced cement board to form the buried panel 10. It can be formed by molding or extrusion. As a panel (fiber-reinforced cement board) having such a smooth surface, "flexible board (veneer finish type)", which is a type of slate board from the Fiber Reinforced Cement Board Association, is known.

The surface of the cured paint film can be formed by applying a paint to a portion of the fiber-reinforced cement board for forming the embedded panel 10 where the decorative surface is to be formed, and then curing the paint. Examples of paints that can be used include organic paints, inorganic paints, and organic/inorganic composite paints. From the viewpoint of durability of the surface of the cured paint film formed, inorganic paints and organic/inorganic composite paints are preferred. Examples of organic paints include acrylic resin paints, epoxy paints, urethane resin paints, fluororesin paints, polyester paints, and vinyl organosol paints. Examples of inorganic paints include alkyl silicate paints, inorganic paints containing photocatalytic titanium oxide, silica sol paints, alkali metal salt paints, metal alkoxide paints, cementolysine paints, and cement stucco paints. Examples of organic/inorganic composite paints include organic/inorganic composite paints containing siloxane bonds, metal alkoxide paints, ceramic paints, and organic/inorganic composite paints containing photocatalytic titanium oxide. These paints may contain other additives such as fillers, thickeners, leveling agents, antifoaming agents, and stabilizers in addition to the pigments.

Examples of the decorative sheet for forming the decorative sheet attachment surface include vinyl chloride decorative sheets, thermoplastic resin decorative sheets, thermosetting resin decorative sheets, thin leaf decorative sheets, and so-called P tiles. Vinyl chloride decorative sheets, for example, are made by printing a pattern on an opaque vinyl chloride sheet mixed with pigment, heat-adhering a transparent vinyl chloride film onto the printed surface, and embossing the printed surface as necessary. It can be made by The embossing can be performed, for example, by pressing with a roll having an uneven surface. The thermoplastic resin decorative sheet can be produced, for example, in the same manner as the vinyl chloride decorative sheet production method, except that various plastic resins are used instead of vinyl chloride resin as the sheet-constituting resin. Thermosetting resin decorative sheets are made by impregnating decorative paper with a basis weight of 55 to 200 g/m ² with a thermosetting resin such as melamine resin, diallyl phthalate resin, or polyester resin. It can be produced by stacking it on a base sheet such as kraft paper and subjecting the resulting laminate to hot pressure press molding using a multistage hot press machine or a continuous molding press machine. Thin leaf decorative sheets, for example, are made by applying colored solid printing to thin paper with a basis weight of about 30 g/m ² , printing a design on the solid printing surface, and applying amino alkyd resin paint or polyurethane resin paint to the printed surface. It can be manufactured by applying a paint finish. The decorative sheet for forming the decorative sheet application surface is preferably a vinyl chloride decorative sheet or a P tile. A method for attaching the decorative sheet to the fiber-reinforced cement board for forming the buried panel 10 includes adhesion using an adhesive resin such as urethane resin, vinyl resin, or acrylic resin.

The buried panel 10 which is a flat fiber-reinforced cement board as described above is the one described in Japanese Patent Application Laid-Open No. 8-312092 (however, it does not contain asbestos), and the one made by Daicel Finechem Co., Ltd. "Cell Kekomi Panel" and "Cell Slim Step Board" are particularly preferred.

If the material of the buried panel 10 is other than fiber-reinforced cement board, that is, thermoplastic resin, thermosetting resin, metal, inorganic materials such as ceramics, wood, paper, or laminated or mixed materials of these materials, adhesive Methods for providing the improved surface include molding the surface 11 into irregularities, roughening the surface using mechanical and chemical methods, embedding an adhesion-improving material that may include a porous layer or a foam layer in the surface 11, or using a wooden structure. Examples of methods include fitting in, gluing (melting, hardening), and fixing with screws.

The shape of the adhesion improving material that may include the porous layer or foam layer may be a plate, cloth, sponge, or particle aggregate.

The adhesion improving material that may include the porous layer or foam layer may include concrete, glass, ceramic, ceramics, diatomaceous earth, stone, wood, and paper, depending on the material of the buried panel used. , natural fiber materials, carbon materials, thermoplastic resins, and thermosetting resins.

In particular, when embedding or adhering an adhesion improving material to the embedded panel 10, it is preferable to use a combination that is easy to adhere to each other.

For example, for buried panels made of fiber-reinforced polyurethane, it is preferable to use urethane sponge foam as the adhesion improving material.

Furthermore, when a member whose circumference is formed by a continuous surface is buried against the surface 11, fitted into a wooden frame, glued (melted, hardened), or fixed with screws, the embedded panel 10 is fixed by hardening of the poured concrete itself. It can also be fixed to concrete structures.

In particular, this is the case when a member whose circumference is formed by a continuous surface is embedded in the surface 11, fitted into a wooden frame, glued (melted, hardened), or fixed with screws, and the step structure with a height of 1 m or less (for example, a unit (including step structure for buses and step structure with water return), the worker has to stack and transport multiple buried panels 10, and at that time, it is necessary to ensure that even if multiple panels are stacked, the panels do not easily shift from each other, and , In order to make it easy to transport without bulking up, the 11 continuous faces of the buried panels 10 facing each other are arranged so that the members forming the circumference do not overlap, or the circumference is formed by continuous faces. The components can be carried in a bag or the like and carried over the shoulder, and when the embedded panel 10 is installed, they can be constructed so that they can be easily fitted into the embedded panel.

For example, a thin metal member for fitting can be fixed to a thin control panel board to create an embedded panel, and a wooden member whose periphery is formed by continuous surfaces of a rectangular prism with a hollow center can also be used for fitting. The thin metal member can be fixed and the fitting and fixing work can be easily carried out at the construction site.

(Connection member 20)
The connecting member 20 extends from the surface 11 of the buried panel 10 to the inside of the concrete filling section 80 to define the width of the concrete filling section 80 when the formwork unit It is a member for

As shown in FIG. 1, the connecting member 20 is a rod-shaped member having a separator portion 21 and a male thread portion 22 provided at one end of the separator portion 21.

The separator portion 21 may be linear or may be bent at any number of locations.

The length of the separator portion 21 can be selected as appropriate depending on the width of the concrete-filled section 80.

The male threaded portion 22 is a threaded portion having the same axis as the separator portion 21 , and is provided at one end of the separator portion 21 . Further, the diameter of the male threaded portion 22, that is, the diameter at the top of the thread (=nominal diameter) is approximately the same diameter as the separator portion 21.

The end of the separator part 21, that is, the end opposite to the end where the male thread part 22 is provided, is connected to the concrete filling section 80 when the assembly formwork unit Y is assembled to form the concrete filling section 80. It is connected to the non-movable part located inside the. The end of the separator portion 21 may be threaded. If a thread is formed on the end of the separator portion 21, it can be screwed to a non-movable portion.

The length of the male threaded portion 22 may be long enough to screw into the female threaded portion 33 of the first fixture 30 and fix the connecting member 20 to the embedded panel 10.

(Tsuba 23)
The collar 23 is a planar member having a hole 24 through which the male threaded portion of the second fixture 40 can pass, and an end surface 23A for contacting the buried panel surface. When assembling the formwork unit By inserting the male threaded part of the second fixture 40 into the hole 24 and screwing it to the female threaded part of the first fixture 30, the connection between the embedded panel 10 and the connecting member 20 can be reinforced. When filling the formwork formed by assembling the prefabricated formwork unit Y with concrete raw material, it is possible to prevent the buried panel 10 from being distorted by the own weight of the concrete raw material or a load (for example, an impact load). . Since the formwork unit X of the present disclosure includes the collar 23, it has the strength to withstand the own weight and loads (for example, impact loads) of concrete raw materials, and can perform concrete pouring without reinforcing with formwork supports. can.

The number of holes 24 in the collar 23 is at least one, and may be two or more (for example, 2 to 4). When there are two or more holes 24, it becomes possible to fix the panel across two or more adjacent buried panels 10. Thereby, adjacent buried panels 10 can be firmly connected to each other, and durability that can withstand high lateral pressure can be provided.

The thickness of the collar 23 is, for example, 2 mm to 20 mm, preferably 3 mm to 10 mm.

The shape of the collar 23 in plan view is not particularly limited, but may be, for example, circular, square, polygonal, or the like.

The sum of the contact area of the collar 23 to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is the same as the surface area of one side of the buried panel 10 in that the formwork unit X has an excellent reinforcing effect. 0.5% or more is preferable. In addition, in terms of being able to withstand higher lateral pressure, the surface area of one side of the buried panel 10 is preferably 2% or more, more preferably 5% or more.

Therefore, if the formwork unit The total of the contact area to the surface and the contact area of the first fixture to the back surface of the buried panel is preferably 5% or more, more preferably 10% or more, and 20% or more of the surface area of one side of the buried panel 10. Particularly preferred.

The area of the contact surface 23A of the collar 23 to the buried panel 10 (that is, the area of the protruding portion of the collar 23) can be changed as appropriate depending on the size of the buried panel 10 and the number of separator parts 21 used per buried panel. It is preferable to do so.
For example, when using a buried panel 10 with a size (length x width) of 200 to 350 mm x 1820 mm and attaching seven connecting members 20 in a zigzag pattern, the area is, for example, 2 to 10%, preferably 3 to 7%. (Figure 2(a)).
When using a buried panel 10 with a size (length x width) of 60 to 80 mm x 1820 mm and attaching five connecting members 20 in a row horizontally, the overhanging area of the collar 23 is, for example, 5 to 15%, preferably 8 to 12%. % (Figure 2(b)).
When using a buried panel 10 with a size (length x width) of 60 to 80 mm x 1820 mm and attaching four connecting members 20 in a row horizontally, the overhanging area of the collar 23 is, for example, 5 to 20%, preferably 10 to 18%. % (Figure 2(c)).

Furthermore, the thinner the buried panel 10 is, the more the area of the contact surface 23A of the collar 23 to the buried panel 10 is increased, which reduces the work, time, and cost required for constructing the concrete structure, making it easy and convenient. Through speedy operations, it is possible to form concrete structures that are strong and have excellent aesthetics.

The material for forming the tsuba 23 is not particularly limited, and may include various metals (e.g., steel, stainless steel, titanium steel), high-rigidity ceramics, thermosetting plastics, thermoplastic engineering plastics, and various durable materials. Materials coated with adhesives can be used.

The collar 23 may have a color, gloss, pattern, surface treatment (for example, uneven treatment, etc.), workmanship, etc. on the surface 23b opposite to the surface 23A that contacts the embedded panel 10.

Further, the collar 23 may be provided with a hook on the surface 23b from which a lighting device, a liquid crystal panel, etc. can be hung. Further, a hole may be provided to which a hook can be attached. Note that there is no particular limit to the number of hooks and holes provided.

(First fixture 30)
The first fixture 30 is a member installed on the back side (surface 11 side) of the buried panel 10, and is a member that fixes the connecting member 20 and the second fixture 40 to the buried panel 10.

As shown in FIG. 1, the first fixture 30 is a convex member having an end surface 31 for contacting the back surface of the embedded panel, and the first fixture 30 is a convex member having an end face 31 for contacting the back surface of the embedded panel, and is connected to the male threaded portion 22 of the connecting member 20 and the second It has a through hole including a female threaded portion 33 that is screwed into the male threaded portion 42 of the fixture 40 .

As shown in FIG. 5, the first fixture 30 may include a convex main body 32 and a pedestal portion 34 provided at one end of the main body. The pedestal portion 34 has a shape extending substantially perpendicularly from the axial direction of the convex body 32 at the end of the convex body 32 . The surface of the pedestal portion 34 opposite to the surface on which the convex main body 32 is provided serves as the end surface 31 for abutting the embedded panel.

The overhang length of the pedestal portion 34 is, for example, about 10 to 100 mm, preferably 20 to 50 mm. The shape of the pedestal portion 34 in plan view is not particularly limited, and may be, for example, circular, quadrangular, polygonal, or the like.

In addition, the sum of the contact area of the collar 23 (or the collar-shaped head 44 described later) to the surface of the buried panel 10 and the contact area of the first fixture 30 to the back surface of the buried panel 10 is 0.5% or more of the surface area of one side of the buried panel 10 is preferable in terms of the excellent reinforcing effect. In addition, in terms of being able to withstand even higher lateral pressure, it is preferably 2% or more of the surface area of one side of the buried panel 10, more preferably 3.5% or more, and particularly preferably 5% or more.

(Second fixture 40)
The second fixture 40 is a member for fixing the collar 23 to the buried panel 10 from the front side (surface 12 side) of the buried panel 10. The second fixture 40 has a head 41 and a male threaded portion 42, as shown in FIG. The male threaded portion 42 is screwed into the female threaded portion 33 of the first fixture 30 .

Then, the second fixture 40 is inserted into the hole 24 of the collar 23 with the male threaded part 42, and further inserted into the hole 13 of the buried panel 10 from the back side (surface 11 side) of the buried panel 10. The collar 23 can be fixed to the buried panel 10 by screwing the female threaded part 33 of the first fixture 30 onto the male threaded part 42 protruding from the front side (surface 12 side). .

The head 41 of the second fixture 40 may have a size that does not fit through the hole 13 of the embedded panel 10.

The length of the male threaded portion 42 of the second fixture 40 may be long enough to screw into the female threaded portion 33 of the first fixture 30 and fix the collar 23 to the embedded panel 10.

(Second fixture with flange)
In the formwork unit X of the present disclosure, the collar 23 and the second fixture 40 may be included as separate members as described above, or may be included as one member. That is, the collar 23 and the second fixture 40 may be replaced with a second fixture with a collar 43 having a collar-shaped head 44 and a male threaded portion 42 .

The sum of the contact area of the flange-shaped head 44 of the second fixture 43 with a flange to the surface of the buried panel 10 and the contact area of the first fixture 30 to the back surface of the buried panel 10 is the same as that of the formwork unit X. In terms of excellent reinforcing effect, it is preferably 0.5% or more of the surface area of one side of the embedded panel 10. In addition, in terms of being able to withstand even higher lateral pressure, it is preferably 2% or more of the surface area of one side of the buried panel 10, more preferably 3.5% or more, and particularly preferably 5% or more.

The second fixture 43 with a flange is a member having a shape in which a threaded portion 42 is coupled to a flange-shaped head 44, as shown in FIG. As shown in FIG. 3, the number of external threads 42 coupled to the collar-shaped head 44 is at least one, and may be two or more (for example, 2 to 4).

When the second flange-equipped fixture 43 has a plurality of male threads 42, by using it across a plurality of adjacent buried panels 10, it is possible to firmly connect the adjacent buried panels 10 to each other. , it can provide durability that can withstand high lateral pressure.

(connection tool)
The formwork unit X may further include a connector 50A as shown in FIG. 6(a). The connecting tool 50A is used to connect two adjacent buried panels 10 that are assembled when constructing a concrete structure in such a manner that their surfaces 12 are flush with each other, and in this embodiment, they are at least flat. It includes a plate 51 and a predetermined number of fasteners 52 (FIG. 6(a) exemplarily shows a connecting tool 50A including four fasteners 52). In a state where the two adjacent buried panels 10 are connected by the connector 50A, the flat plate 51 is applied to the two adjacent buried panels 10, for example, on the surface 12 (outer surface) side thereof. The fastening material 52 is, for example, a drill screw, and when the fastening material 52 is a drill screw, from the surface 12 side of the buried panel with respect to the through hole 13 drilled through the flat plate 51 and each buried panel 10. The inserted fastening material 52 realizes fixation of the flat plate 51 across the two adjacent embedded panels 10. In such a connector 50A, the flat plate 51 may be applied to the surface 11 (inner surface) side of two adjacent embedded panels 10, and the fastening material 52 may be a bolt. When the fastening material 52 is a bolt, the bolt (the fastening material 52 ) and a nut fastened to the screw structure on the surface 11 side, fixing of the flat plate 51 across two adjacent embedded panels 10 is realized.

It is preferable that the formwork unit X is provided with such a connecting tool 50A in order to appropriately form a flat side wall surface spanning the plurality of buried panels 10 in the concrete structure formed using the formwork unit X. . Further, after forming the side wall surface using such a connector 50A, the fastening material 52 and, if the flat plate 51 is applied to the surface 12 side, the flat plate 51 is removed from the side wall surface. By filling at least the outer open end of the relatively small buried panel through-hole 13 into which the fastening material 52 was inserted with mortar, a good aesthetic appearance can be ensured on the side wall surface.

Although the number of fastening members 52 included in one set of connectors 50A is four in FIG. 6(a), it may be two, three, or five or more. Further, the number of connectors 50A used to connect a set of two adjacent buried panels 10 is one in FIG. 6(a), but may be two or three or more. .

The formwork unit X may be provided with a flat joiner (or H-shaped joiner) as shown in FIG. 12(a) of Japanese Patent No. 4103729, for example, instead of the connector 50A as shown in FIG. 6(a). .

The formwork unit X may further include a connector 50B as shown in FIG. 6(b). The connecting tool 50B connects two adjacent buried panels 10 that are assembled during construction of a concrete structure in such a manner that they are perpendicular to each other, or in a manner that their surfaces 11 intersect. This embodiment includes at least a bending plate 53 and a predetermined number of fasteners 54 (FIG. 6(b) illustratively shows a connecting tool 50B with four fasteners 54. ). In a state where the two adjacent embedded panels 10 are connected by the connector 50B, the bending plate 53 is applied over the two adjacent embedded panels 10, for example, on the surface 12 (outer surface) side thereof. The fastening material 54 is, for example, a drill screw, and when the fastening material 54 is a drill screw, from the surface 12 side of the buried panel with respect to the through hole 13 drilled through the bending plate 53 and each buried panel 10. The inserted fasteners 54 achieve fixation of the bending plate 53 across the two adjacent buried panels 10. In such a connector 50B, the bending plate 53 may be applied to the surface 11 (inner surface) side of two adjacent embedded panels 10, and the fastening material 54 may be a bolt. When the fastening material 54 is a bolt, the bolt (the fastening material 54 ) and a nut fastened to the screw structure on the surface 11 side, fixing of the bending plate 53 across two adjacent embedded panels 10 is realized.

The fact that the formwork unit X is provided with such a connector 50B means that the concrete structure formed using the formwork unit This is preferable for proper formation. Further, after forming the side wall surface using such a connecting tool 50B, the fastening material 54 and, if the bending plate 53 is applied to the surface 12 side, the bending plate 53 is removed from the side wall surface. By filling at least the outer open end of the relatively small buried panel through-hole 13 into which the fastening material 54 was inserted with mortar, a good aesthetic appearance can be ensured on the side wall surface.

Although the number of fastening members 54 included in one set of connectors 50B is four in FIG. 6(b), it may be two, three, or five or more. Further, the number of connectors 50B used to connect a set of two adjacent buried panels 10 is one in FIG. 6(b), but may be two or three or more. .

In addition, the two buried panels 10 shown in FIG. 6(b) are arranged to form a stepped portion of a concrete structure having a stepped portion including a protruding corner portion (as described above where an adhesive improved surface is provided). A step section including a protruding corner portion is formed on the side of surface 11). On the other hand, when the front side (surface 12 side) and the back side (surface 11 side) of each buried panel 10 shown in FIG. 6(b) are switched, the arrangement of the two buried panels 10 is Arrangement for forming the entered corner of a concrete structure having a stepped portion including a corner portion (arrangement in which the stepped portion including the entered corner portion is formed on the side of surface 11 where the adhesion improved surface is provided) It is.

Instead of the connector 50B as shown in FIG. 6(b), the formwork unit may be provided.

Extrusion corner joiners made of, for example, aluminum or vinyl chloride resin are commercially available from Souken Co., Ltd., Fukubi Chemical Industry Co., Ltd., Shinwa Co., Ltd., Sato Takuzai Co., Ltd., etc., and these can be used.

(Height adjustment tool)
The form unit X may further include a height adjuster 60A as shown in FIGS. 7(a) and 7(b). Such a configuration is preferable for accurately positioning the installation height of the buried panel 10 when constructing a concrete structure using the formwork unit X.

The height adjuster 60A is used to adjust the height position of the buried panel 10 assembled during construction of a concrete structure, and includes a receiving member 61 and leg members 62 that support the receiving member 61.

In this embodiment, the receiving member 61 has a groove for receiving an embedded panel that is wider than the thickness of the embedded panel 10 . Alternatively, the receiving member 61 may not have a groove for receiving an embedded panel. For example, the receiving member 61 may have a flat plate of various shapes as an embedded panel abutting portion. The plane plate may have an upwardly folded structure which can also be used to define the position of the buried panel 10 by coming into contact with the surface 11 or 12 of the buried panel. Alternatively, the receiving member 61 may have a rod-shaped member for supporting an embedded panel as an embedded panel contacting portion. The rod-shaped member may have an upwardly folded structure that can come into contact with the surface 11 or 12 of the buried panel and be useful for determining the position of the buried panel 10, or may have a V-shape or a U-shape. It may be something. These configurations in which the receiving member 61 does not have the above-mentioned grooves are preferable from the viewpoint of ensuring flexibility in the mounting location and orientation when the embedded panel 10 is assembled.

It is preferable that the back surface of the receiving member 61 (the back surface of the surface that receives the embedded panel 10) has a screw structure section or a nut section for coupling with the leg member 62. In FIG. 7(a), a screw structure portion extending vertically from the back surface of the receiving member 61 is provided.

The leg member 62 is a member that supports the receiving member 61. Further, the leg members 62 may have any configuration as long as the height adjuster 60A can perform the function of adjusting the height position of the embedded panel 10. The leg member 62 includes at least a rod-shaped member.

As the rod-shaped member, a separator used in the above-mentioned connecting member 20 or a separator in which two or more separators are connected via connecting fittings 63 and 66 (for example, a turnbuckle or a joint nut) may be used. I can do it.

It is preferable that one end of the rod-shaped member has a threaded structure or a nut for coupling with the receiving member 61. Further, it is preferable that the other end of the rod-shaped member is provided with a base having a predetermined shape and structure suitable for contacting an existing floor surface. In FIG. 7(a), one end of the rod-shaped member has a nut portion, a screw structure extending vertically from the back surface of the receiving member 61 is screwed into the nut portion, and the other end touches the floor surface. It is supported by a pyramid-shaped base.

Alternatively, the leg member 62 is a base having a support end face suitable for contacting an existing flat floor surface and a screw hole opening on the opposite side of the end face, and a double-cut bolt is inserted into the threaded hole part of the base. Alternatively, one end of a bar screw may be screwed in, and the other end may form the threaded structure. An example of the base having a support end surface and a screw hole is a first fixture 30 shown in FIG. 5 . The leg member 62 is constructed by screwing a double-sided bolt or rod screw into the female threaded portion 33 of the convex main body 32 while the pedestal portion 34 of the first fixture 30 is installed so as to be in contact with a flat floor surface. be done.

Alternatively, the leg member 62 may have a configuration in which the other end of the rod-shaped member is embedded in existing concrete (a so-called anchor bolt), or the other end of the rod-shaped member may be a steel member such as a steel frame or reinforcing bar. The rod-shaped member may have a configuration in which the rod-shaped member is welded and fixed to the rod-shaped member, or it may have a configuration in which the other end of the rod-shaped member is connected to a steel member such as a steel frame or a reinforcing bar via a connecting metal fitting. Examples of the above-mentioned connecting fittings include the product name "Sepa Grip" sold by Okabe Co., Ltd., the product name "SK Uniba" and product name "Domaster" sold by Kyoei Seisakusho Co., Ltd., and the product name "Domaster" sold by Kyoei Seisakusho Co., Ltd. The product name "Tetsukabuto (with nuts)" sold by the company, the product name "KS Guts" sold by Kunimoto Shokai Co., Ltd., the product name "Sepajime" sold by Inui Sangyo Co., Ltd., and Kondotech Co., Ltd. The product name "Wire Clip KM Clip" sold by the company, the "Joint fitting for connecting a separator and a reinforcing bar or round bar" described in JP-A-2008-214911, and JP-A-2003- An example is the "connection fitting for reinforcing bars and separators" described in Japanese Patent No. 013600.

7(a) and 7(b) illustratively show a height adjuster 60A in which two sets of leg members 62 are provided, and the height adjuster 60A includes one set of leg members 62. or three or more sets of leg members 62.

The height adjuster 60A shown in FIG. 7(b) receives two adjacent buried panels 10 in a connected state and simultaneously assumes the function of adjusting the height of these buried panels 10. It is preferable that the formwork unit X is provided with such a height adjuster 60A in order to accurately position the installation height of the buried panel 10 when constructing a concrete structure using the formwork unit X. .

The form unit X may further include a height adjuster 60B as shown in FIG. 7(c). The height adjustment tool 60B adjusts the height position of two adjacent buried panels 10 that are assembled during construction of a concrete structure while connecting them in such a manner that their surfaces 11 intersect at a predetermined angle such as a right angle. It is provided with a receiving member 64 and leg members 65 that support the receiving member 64. The fact that the formwork unit X is equipped with such a height adjuster 60B is because the assembly height of two buried panels 10 adjacent in a crossing manner can be adjusted when constructing a concrete structure using the formwork unit X. This is preferable for accurate positioning.

In this embodiment, the receiving member 64 has a groove for receiving an embedded panel that is wider than the thickness of the embedded panel 10 . Alternatively, the receiving member 64 may not have a groove for receiving an embedded panel. For example, the receiving member 64 may have a flat plate of various shapes as an embedded panel abutting portion. The plane plate may have an upwardly folded structure which can also be used to define the position of the buried panel 10 by coming into contact with the surface 11 or 12 of the buried panel. Alternatively, the receiving member 64 may have a rod-shaped member for supporting an embedded panel as an embedded panel abutting portion. These configurations in which the receiving member 61 does not have the above-mentioned grooves are preferable from the viewpoint of ensuring flexibility in the installation location and orientation when the embedded panel 10 is installed.

FIG. 7(c) exemplarily shows a height adjuster 60B in which three sets of leg members 65 are provided, and the height adjuster 60B is provided with one set of leg members 65. Alternatively, it may include two sets of leg members 65, or it may include four or more sets of leg members 65. The configuration of the leg member 65 in the height adjuster 60B is similar to the configuration of the leg member 65 in the height adjuster 60A.

[Assembly formwork unit]
The assembled formwork unit Y of the present disclosure is an assembled formwork unit that forms a formwork for pouring concrete without using formwork support, and is an assembly of the above-mentioned formwork unit X. be.

As shown in FIGS. 8 to 10, the assembled formwork unit Y is constructed such that the male threaded portion 42 of the second fixture 40 is inserted into the hole 13 of the buried panel 10 from the surface side of the buried panel 10 with the collar 23 in between. A first fixture in which the male threaded portion 42 of the second fixture 40 that is attached and protrudes from the back side of the buried panel 10 and the male threaded portion 22 of the connecting member 20 have their end surfaces abutted against the back side of the buried panel 10. 30 and is screwed to the female threaded portion 33.

Note that the assembly procedure is not particularly limited as long as the assembly form unit Y has the above structure.

If the formwork unit The male threaded portion 42 of the second fixture 40 is inserted into the hole 13 of the buried panel 10 from the surface side of the buried panel 10, and the male threaded portion 42 of the second fixture 40 that protrudes to the back side of the buried panel 10 is connected to the male threaded portion 42 of the connecting member 20. The male threaded portion 22 is screwed to the female threaded portion 33 of a first fixture 30 whose end surface is in contact with the back surface of the embedded panel 10.

The number of connecting members 20 attached to one embedded panel 10 is not particularly limited, but is, for example, 1 to 5. Moreover, the connecting members 20 may be attached so as to be lined up in a line, may be attached to the four corners, may be attached to the four corners and the center, or may be attached in a zigzag pattern.

After the assembled formwork unit Y is assembled at a predetermined position, the end of the separator part 21 of the connecting member 20 extending from the surface 11 of the buried panel 10 is connected to the non-movable part located inside the concrete filling section 80. By connecting with the concrete formwork unit Y, the assembled formwork unit Y can be easily fixed, and a formwork defining a section to be filled with concrete raw materials can be formed.

[Concrete structure construction method]
The method for constructing a concrete structure of the present disclosure is a method for constructing a concrete structure by pouring concrete using an assembly formwork unit Y, the method comprising:
Step 1 of arranging the assembly formwork unit Y at a predetermined position to define a section to be filled with concrete raw materials;
A step of fixing the assembled formwork unit Y by connecting the end of the separator section 21 of the placed assembled formwork unit Y with a non-movable part located inside the concrete filling section 80 to form a formwork. 2 and
Step 3 of supplying concrete raw material into the formed formwork.

In step 1, the assembled formwork unit Y is assembled such that the surface 11 of the buried panel 10 including the improved adhesion surface faces inside the concrete filling section 80.

Further, the assembled formwork unit Y is arranged such that the buried panel 10 forms at least one surface selected from the upper surface, the lower surface, and the side wall surface of the section where the concrete raw material is to be filled. preferable.

In step 2, for example, by connecting the end of the separator portion 21 of the assembled formwork unit Y extending from the surface 11 side of the buried panel 10 and the non-movable portion located inside the concrete filling section 80. , the assembled formwork unit Y can be fixed in a predetermined position.

As a method of connecting the end of the separator part 21 (=the end of the separator part 21 opposite to the end having the male thread part 22) and the non-movable part, for example, an assembly type When the frame unit Y is assembled to form the concrete filling section 80, other panels forming the filling section together with the assembled formwork unit Y (for example, the embedded panel 10 of another assembled formwork unit Y located on the opposite side) The end portion of the separator portion 21 may be fixed to a removable panel). If existing concrete forms one corner of the filling section together with the prefabricated formwork unit Y, the ends of the separator portions 21 may be embedded in the concrete to form so-called anchor bolts 14. Further, the end of the separator portion 21 may be welded and fixed to a steel member such as a steel frame or reinforcing bar existing inside the concrete filling section 80, or may be connected to the steel member via a connecting fitting. .

Examples of the connecting fittings include the product name "Sepa Grip" sold by Okabe Co., Ltd., the product name "SK Uniba" and "Domaster" sold by Kyoei Seisakusho Co., Ltd., and the product name "Domaster" sold by Kyoei Seisakusho Co., Ltd. The product name "Tetsukabuto (with nuts)" sold by Kunimoto Shokai Co., Ltd., the product name "KS Guts" sold by Kunimoto Shokai Co., Ltd., the product name "Sepajime" sold by Inui Sangyo Co., Ltd., Kondotech Co., Ltd. The product name "Wire Clip KM Clip" sold by JP-A No. 2008-214911, "Joint fitting for connecting a separator and reinforcing bar or round bar" described in JP-A No. 2008-214911, and JP-A No. 2003-013600 An example of this is the "connection fittings for reinforcing bars and separators" described in the above publication.

For example, if concrete is poured using the assembly form unit Y including the flange 23 and the second fixture 40, a concrete structure with the flange 23 exposed on the surface will be constructed. The collar 23 may rust when exposed to wind and rain, although this varies depending on the material. Therefore, by removing the second fixture 40 and removing the exposed collar 23 after the concrete has hardened, it is possible to prevent the surface of the concrete structure from being contaminated by rust. The removed collar 23 can then be reused.

The concrete structure includes a concrete structure including a protruding structure that protrudes upward, downward, or sideways, and a concrete structure including a protrusion structure that protrudes upward, downward, or sideways. The concrete structures include, for example, concrete stairs, rising steps (including steps for unit baths and water return steps), thresholds, beams, window frames, ceilings, floors, columns, walls, retaining walls, At least one type of structure selected from a parapet and a pedestal.

The concrete structure is particularly concrete having a step structure of 1 m or less (for example, a rising step of 1 m or less; examples include steps for unit baths, water return steps, wiring for electrical cords, floor steps for storage, etc.) Structures are preferred.

Concrete structures cast using formwork made of multiple buried panels assembled flush in the height direction are concrete structures with a thickness of 20 cm or less and a height of 2 mm or less. For example, thin walls installed on balconies to prevent falls or separating areas; partition walls for spaces to store disaster prevention tools, materials, food, water, etc.; emergency power sources, batteries for electric vehicles. , partition walls to create basement spaces that can accommodate replacement tires, folding ladders, large tools, etc.

A method of forming a formwork when the concrete structure is a concrete structure including a downwardly protruding convex structure such as a beam will be described below with reference to FIG. 11.
The assembly form unit Y is arranged on the surface of the beam 70, and the end of the separator part 21 of the arranged assembly form unit Y is embedded in the beam 70 to form a so-called anchor bolt 14. A formwork can be formed by fixing the frame unit Y.

The concrete structure has a special shape among convex structures such as frames that protrude upward (more specifically, a shape in which the top surface of the columnar structure is chamfered, that is, a truncated pyramid-like structure on the top surface of the columnar structure). A method of forming a formwork for a concrete structure including a shape in which a part is formed will be described below with reference to FIGS. 12 and 13.
First, reinforcing bars (and auxiliary steel frames, if necessary) 81 are placed inside the concrete-filled section 80.
Next, the assembled formwork unit Y is arranged at a position surrounding the side surface of the concrete filling section 80 and a position covering the top surface of the concrete filling section 80, and the end of the separator part 21 of the arranged assembled formwork unit Y, Connect with reinforcing bars or auxiliary steel frame 81. Thereby, the assembled formwork unit Y can be fixed, and the formwork can be formed.

Conventionally, in order to construct a concrete structure in which a truncated pyramidal structure is formed on the top surface of a columnar structure such as a frame, first, a formwork is formed using a removable panel to form a columnar structure. Thereafter, concrete is applied to the upper surface of the formed columnar structure using a trowel or the like, without using a formwork, to form a pyramidal truncated structure. However, in order to form a truncated pyramid-shaped structure without using formwork, the concrete raw material is applied layer by layer, and the upper surface and side wall surface of the applied concrete material are shaped like a truncated pyramid to be formed. The process of trimming to match the structure must be repeated to the intended height. Therefore, it was time consuming and caused an increase in cost. However, if the prefabricated formwork unit Y is used, after the columnar structure and the truncated pyramidal structure are assembled so as to be partitioned, the columnar structure is first formed by filling with concrete raw materials, and then the concrete The outer periphery of the buried panel 10 in the assembly form unit Y, which is filled with raw materials and fixed as the upper surface of the truncated pyramidal structure to be formed, is used as a "hit" (that is, as a reference for the finished surface of the mortar), and the assembly is carried out. A truncated pyramidal structure can be easily formed by simply adjusting the side surface portion (dotted line portion in Fig. 12) that is not covered by the formwork unit Y with a trowel, etc., reducing labor and cost and creating a neat structure. can be finished.

Furthermore, a columnar structure is formed by forming a formwork with a removable panel, and then the assembled formwork unit of the present disclosure is installed only on the upper surface of the formed columnar structure (a position that covers the upper surface of the concrete filling section 80). A concrete structure having the shape shown in FIG. 12 can also be constructed using Y.

A method of forming a formwork for a concrete structure including a rising step will be described below with reference to FIG. 14.
The assembled formwork unit Y is arranged in the riser part of the rising step with the lower end of the embedded panel 10 of the assembled formwork unit Y embedded below the tread surface or floor surface 76, and the arranged assembled formwork unit By connecting the ends of the separator portions 21 of the Y to reinforcing bars or auxiliary steel frames 81 installed inside the concrete-filled section, the assembled formwork unit Y can be fixed to form a formwork.

After forming the formwork, concrete raw materials are supplied into the formed formwork. First, in the concrete raw material filling section formed by the assembly formwork unit Y, the concrete raw material is supplied to a height position H1 corresponding to the height at which the tread surface or floor surface 76 is to be formed. Thereafter, if necessary, compaction is performed to densely fill the supplied concrete raw material, the surface of the tread or floor 76 is finished with a trowel, etc., and the concrete is cured through curing.

Next, in the concrete raw material filling section formed by the formwork Y, concrete raw material is further supplied to a height position H2 corresponding to the height at which the upper surface 77 of the rising step is formed. Thereafter, if necessary, compaction is performed to densely fill the supplied concrete raw material, the surface of the tread or floor 76 is finished with a trowel, etc., and the concrete is cured through curing. Thereby, the embedded panel 10 of the assembled formwork unit Y forms a riser with a rising step.

Examples of the concrete structure including a rising step include a concrete structure including a step to prevent water leakage from a unit bath, a concrete structure including a step for installing office floor wiring, an external wall (for example, ALC, In the case of installing an ECP, parapet, etc., this includes a concrete structure that includes a protruding structure section that is installed to prevent rainwater from entering through gaps in the outer wall.

According to the concrete structure construction method of the present disclosure, the work, time, and cost required for constructing a concrete structure can be reduced because the assembly form unit Y is used that is easy to assemble and does not need to be removed after construction. can be reduced. In addition, when a concrete structure includes surfaces other than upward surfaces such as walls, ceilings, beams, etc., such as downward surfaces and side wall surfaces, in conventional construction methods, if mortar is applied thickly at once, it may easily peel off. Therefore, a method has been adopted in which a concrete structure is formed by applying a thin layer of mortar and repeating the process of applying more layers after the mortar hardens until a predetermined thickness is reached. However, according to the concrete structure construction method of the present disclosure, A concrete structure with a predetermined thickness is formed by simply filling the formwork once formed by the prefabricated formwork unit Y, which is firmly fixed to the foundation part of the concrete structure or the steel frame forming the frame. can do. In addition, if the concrete structure after construction includes side walls such as walls and downward surfaces such as ceilings and bottom surfaces of beams, those using conventional construction methods may collapse due to earthquakes etc. However, in the concrete structure construction method of the present disclosure, as described above, the prefabricated formwork unit Y, which is firmly fixed to the foundation part or the steel frame forming the framework, is attached to the surface of the concrete structure. Because it covers the walls, it is possible to prevent the side walls and downward surfaces of concrete structures from collapsing due to earthquakes, etc.

Further, according to the concrete structure construction method of the present disclosure, since the prefabricated formwork unit Y does not need to be removed after construction, for example, the steps (the first upward surface, the second upward surface, and the When constructing a concrete structure having a stepped structure consisting of a side wall surface between the opposite surfaces, the assembled formwork unit Y that defines the side wall surface is installed without creating a gap between it and the first upper surface. Can be assembled. Specifically, the assembly form unit Y can be assembled so that the height of the lower end of the buried panel 10 is the same as the above-mentioned height position H1 or a position lower than the height position H1. Therefore, it is possible to prevent leakage of concrete raw materials from gaps, and there is no need to scrape off the excess parts formed by leaked concrete raw materials or to repair the scraped areas if necessary, which eliminates the work required for construction. - Time and costs can be reduced.

Furthermore, in the concrete structure construction method of the present disclosure, since the prefabricated form unit Y is used, the strength of the concrete structure can be maintained even without providing reinforcing bars as densely as in the past. Therefore, by lowering the installation density of reinforcing bars, the filling of concrete raw materials into the formwork becomes smoother, and compaction can also be performed using a push rod, rod vibrator, or formwork vibrator. Thereby, it is possible to suppress the occurrence of small plates (so-called junkers) in the concrete structure, and it is possible to form a concrete structure with excellent strength and aesthetic appearance.

In the construction of a concrete structure using the prefabricated formwork unit Y, as described above, the buried panel 10 is integrated with the concrete structure to be formed to form a side wall surface. The embedded panel 10 of the assembled formwork unit Y does not require removal work after construction.

Moreover, since the assembled formwork unit Y does not require removal work after construction as described above, it can be assembled sufficiently firmly when forming the formwork that defines the concrete raw material filling section 80. By using the prefabricated formwork unit Y, it is possible to suppress the occurrence of distortion in the buried panel 10 during concrete pouring, and to prevent the removable panel from being distorted during concrete pouring in conventional construction methods. However, if the assembled formwork unit Y is used, the use of formwork supports can be avoided.

As described above, the prefabricated formwork unit Y is suitable for suppressing the work, time, and cost required for constructing a concrete structure.

[Concrete structure repair method]
The method for renovating a concrete structure of the present disclosure is a method for renovating a concrete structure by pouring concrete using an assembly formwork unit Y, the method comprising:
Step 1' of fixing the end of the separator part 21 of the assembled formwork unit Y to the surface to be repaired of the concrete structure to form a formwork;
and step 2' of supplying concrete raw material into the formed formwork.

Step 1' will be explained with reference to FIG. 15. In the step 1', the assembled formwork unit Y is arranged to face the renovated surface 73 of the concrete structure (window frame 72 in FIG. 15), and the assembled formwork unit Y is placed from the surface 11 of the buried panel 10. By fixing the ends of the extending separator portions 21 (more specifically, the separator portions 21 fixed in a substantially vertical direction) to the surface 73 to be repaired of the concrete structure, the concrete filling section 80 is fixed. It is possible to form a formwork that defines the

As a method of fixing the end of the separator part 21 to the surface to be repaired 73 of the concrete structure, for example, the end of the separator part 21 is embedded in the surface to be repaired 73 of the concrete structure, and so-called anchor bolts 14 are fixed. Alternatively, the end of the separator portion 21 may be welded and fixed to a steel member such as a steel frame or reinforcing bar, or may be connected to a steel member such as a steel frame or reinforcing bar via a connecting fitting.

According to the method for renovating a concrete structure of the present disclosure, the work, time, and cost required for renovating a concrete structure can be reduced because the assembled formwork unit Y is used that is easy to assemble and does not need to be removed after construction. can be reduced. In addition, when the surface to be renovated of a concrete structure is a wall or ceiling, etc., in conventional construction methods, if concrete is applied thickly at once, peeling may occur, so apply it thinly using a trowel etc. However, according to the concrete structure repair method of the present disclosure, the concrete structure can be firmly fixed to the foundation part of the concrete structure or the steel frame forming the framework. A concrete structure repaired portion having a predetermined thickness can be formed by filling concrete once into the concrete filling section 80 formed by the prefabricated formwork unit Y.

In addition, when the surface to be repaired of a concrete structure is a side wall surface such as a wall, or a downward surface such as a ceiling or the bottom of a beam, conventional construction methods may cause damage to the concrete structure after hardening due to earthquakes, etc. However, in the concrete structure construction method of the present disclosure, as mentioned above, the assembled formwork unit is firmly fixed to the foundation part or the steel frame forming the framework. Since Y covers the surface of the concrete structure, it is possible to prevent the repaired part from peeling off or collapsing due to an earthquake or the like.

The above-mentioned "concrete structure repair part" is a part formed by repair on the surface of the concrete structure to be repaired, and the concrete structure repair part formed by the concrete structure repair method of the present disclosure is , is formed from an assembled formwork unit Y and concrete.

Furthermore, in the concrete structure renovation construction method of the present disclosure, since the prefabricated formwork unit Y is used, the strength of the repaired part can be maintained even if the reinforcement is not arranged as densely as in the past, or even if the reinforcement is omitted. I can do it. Therefore, by lowering the reinforcement density or omitting reinforcement, the filling of concrete raw materials into the formwork becomes smoother, and compaction can be performed using a thrust rod, rod vibrator, or formwork vibrator. It becomes possible. Thereby, it is possible to suppress the occurrence of small plates (so-called junkers) in the concrete structure repaired portion, and it is possible to improve the strength and aesthetic appearance.

[Concrete structure]
In the concrete structure of the present disclosure, the buried panel 10 included in the assembled formwork unit Y forms at least one surface selected from the top surface, bottom surface, and side surface of the concrete structure. Note that the upper surface includes an oblique upper surface, and the lower surface includes an oblique lower surface.

The concrete structure of the present disclosure includes a concrete structure including a protruding structure that protrudes upward, downward, or sideways, and a concrete structure including a protrusion structure that protrudes upward, downward, or sideways. The concrete structure of the present disclosure is, for example, at least one type of structure selected from concrete stairs, thresholds, beams, window frames, ceilings, floors, columns, walls, retaining walls, parapets, and frames. .

In the concrete structure of the present disclosure, the prefabricated formwork unit Y, which is firmly fixed to the foundation part of the concrete structure or the steel frame forming the frame, is provided on at least one surface selected from the top surface, bottom surface, and side surface of the concrete structure. Because the concrete is covered, there is no risk of the concrete peeling off, and it can also prevent it from collapsing due to earthquakes, etc. Furthermore, although the surface 12 of the buried panel 10 included in the assembled formwork unit Y is exposed on the surface of the concrete structure, if the surface 12 is formed with, for example, a decorative surface, it has a beautiful appearance.

The above configurations and combinations thereof of the present disclosure are merely examples, and additions, omissions, substitutions, and changes to the configurations can be made as appropriate without departing from the gist of the present disclosure. Furthermore, the present disclosure is not limited by the embodiments, but only by the claims.

EXAMPLES Hereinafter, the present disclosure will be described in more detail with reference to Examples, but the present disclosure is not limited to these Examples.

Example 1
When installing a bathtub (unit bath) in a condominium or other apartment complex, concrete was poured using the assembled formwork units shown below. Incidentally, the above-mentioned concrete pouring was carried out at the same time as the concrete pouring for constructing the floor of the apartment building floor where the unit bath was installed.
The following formwork units were used.
Embedded panel: "Cell Slim Step Board" manufactured by Daicel Finechem Co., Ltd. (longitudinal dimension x transverse dimension x thickness dimension = 1820 mm x 200 mm x 6.5 mm, number of holes: 7, hole position: Five sheets were used (positions shown in FIG. 2(a)).
First fixing device: Seven KP conductor pads manufactured by Sankyo Tech Co., Ltd. (area of the end surface for contacting the back surface of the buried panel: 19.6 cm ² /piece) were used for each buried panel.
Second fixture with flanges: Seven slim head screws with flanges (area of the end surface for contacting the buried panel surface: 1.3 cm ² /piece) were used for each buried panel.
In addition, predetermined connecting members were used.
At this time, the total of the buried panel contact area of the flange and the buried panel contact area of the first fixture was 4% of the surface area of one of the buried panels.

As a result, when a predetermined amount of concrete was poured using a predetermined method, there was no need for chisel work or repair work associated with the protrusion of concrete from the formwork unit. Furthermore, the shape and dimensions of the space formed by the formwork unit were as designed.

On the same day, when unit baths were being constructed for all rooms in an apartment building on the same floor, there was almost no chipping work. Furthermore, even at construction sites in different locations, no lifting or repair work was necessary under the same conditions.

Example 2
The same procedure as in Example 1 was carried out except that six KP conduit pads were used per buried panel. As a result, although there was almost no change in the workload, a small amount of lifting work occurred.

Example 3
Concrete was poured to construct water return steps in apartment complexes such as condominiums using the assembled formwork units shown below. Incidentally, the above-mentioned concrete pouring was carried out at the same time as the concrete pouring for constructing the floor of the apartment building floor where the water return step was installed.
The following formwork units were used.
Embedded panel: "Cell Slim Step Board" manufactured by Daicel Finechem Co., Ltd. (longitudinal dimension x transverse dimension x thickness dimension = 1820 mm x 60 mm x 6.5 mm, number of holes: 5, hole position: 6 sheets were used (positions shown in FIG. 2(b)).
First fixture: Five KP conduit pads manufactured by Sankyo Tech Co., Ltd. (area of the end surface for contacting the back surface of the buried panel: 19.6 cm ² /piece) were used for each buried panel.
Second fixture with flange: 5 slim head screws (area of the end surface for contacting the buried panel surface: 1.3 cm ² /piece) with a 20 mm flange were used for each buried panel.
In addition, predetermined connecting members were used.
At this time, the total of the buried panel contact area of the flange and the buried panel contact area of the first fixture was 10% of the surface area of one of the buried panels.

As a result, when a predetermined amount of concrete was poured using a predetermined method, there was no need for chisel work or repair work associated with the protrusion of concrete from the formwork unit. Furthermore, the shape and dimensions of the space formed by the formwork unit were as designed. Furthermore, even at construction sites in different locations, no lifting or repair work was required under the same conditions.

Example 4
The same procedure as in Example 3 was carried out except that four KP conduit pads were used for each buried panel. As a result, although there was almost no change in the workload, a small amount of lifting work occurred.

<Embodiment 2>
Next, a second embodiment of the present disclosure will be described. Below, a formwork unit X' (assembled formwork unit Y') in which a plurality of buried panels 10 are unitized so as to be arranged facing each other at intervals, and a method of constructing a concrete structure using this will be described.

16 and 17 are diagrams illustrating an assembly form unit Y' according to the second embodiment. FIG. 16 shows the assembled formwork unit Y' viewed from above. FIG. 17 shows the assembled formwork unit Y' viewed from the side (in the direction of arrow AA in FIG. 16).

The assembly formwork unit Y' is installed at the boundary between the first slab construction area A1 and the second slab construction area A2 where slabs are to be constructed. The assembled formwork unit Y' is an assembly obtained by assembling the formwork unit X' shown in FIG. 19, and is used to construct a convex rising step part (step structure) on the upper surface of the slab when constructing the slab. It will be done. Here, as an example, concrete pouring is used to construct an indoor slab (hereinafter sometimes referred to as "first slab area") S1 and a balcony side slab (hereinafter sometimes referred to as "second slab area") S2. At this time, a mode will be described in which a stepped structure including a rising part for the sash mount and a rising part for veranda flashing is constructed in one shot (concrete pouring once) at the boundary between these assembled formwork units Y'.

Reference numeral 100 shown in FIG. 16 is an existing steel pipe column. Further, reference symbol ST shown in FIGS. 16 and 17 indicates slab reinforcement arranged in the first slab construction area A1 and the second slab construction area A2. In FIGS. 16 and 17, the slab reinforcement ST is schematically shown, and in FIG. 17, only a part of the slab reinforcement ST is partially shown for drawing purposes. The slab reinforcement ST is arranged on the base 101 (see FIG. 17) with appropriate spacers 101A interposed therebetween, and the reinforcing bars are typically assembled in a lattice shape. The base 101 is a part that supports a concrete structure constructed using the prefabricated formwork unit Y' and serves as an existing base on which concrete for constructing the concrete structure is poured. For example, the base 101 may be an existing half precast floor slab. After arranging the upper end reinforcing bars (slab reinforcement ST) of the indoor slab S1 and the balcony slab S2 on the half precast slab, concrete raw materials are placed to create a slab that is integrated with the half precast slab. is constructed. Note that the reinforcing bar diameter, reinforcement pitch, etc. of the slab reinforcement ST may be different between the first slab construction scheduled area A1 and the second slab construction scheduled area A2. Further, the base 101 is not particularly limited, and may be a deck plate, for example. In addition, when constructing a dirt floor slab, the base 101 may be the ground or a sacrificial concrete provided on the ground.

FIG. 18 is a diagram illustrating a concrete structure constructed using the assembled formwork unit Y' according to the second embodiment. As shown in FIG. 18, the concrete structure constructed using the prefabricated formwork unit Y' consists of slabs (indoor-side slab S1 and balcony-side slab S2). The rising step 110 includes a first step 120 located on the indoor side and a second step 130 located on the balcony side and connected to the first step 111. Here, the first stepped portion 120 is formed as a rising portion for a sash mount, which serves as a mount for attaching a sash frame. On the other hand, the second stepped portion 130 is formed as a rising portion for turning back water on the balcony that rises from the upper surface of the balcony side slab S2 in order to prevent rain and water from entering from the balcony side to the indoor side. However, the uses and functions of the first step portion 120 and the second step portion 130 that constitute the rising step 110 are merely exemplary and are not particularly limited. As shown in FIG. 18, the first step portion 120 (rising portion for the sash mount) and the second step portion 130 (rising portion for balcony water return) in the rising step 110 have different upper surface heights. In other words, the rising step 110 can be said to be a composite step structure including a plurality of step portions having different upper surface heights.

Symbol SH1 in FIG. 18 is the upper surface of the indoor slab formed as the upper surface of the indoor slab S1. Symbol SH2 is the upper surface of the balcony side slab formed as the upper surface of the balcony side slab S2. Moreover, the code|symbol 111 is a sash mount upper surface formed as the upper surface of the 1st step part 120 (rising part for sash mounts) in the rising step 110. Reference numeral 112 indicates the upper surface of the balcony step formed as the upper surface of the second step portion 130 (rising portion for turning back water on the balcony) in the rising step 110 . Further, reference numeral 113 denotes a side surface rising from the indoor slab top surface SH1 at the boundary position between the indoor slab S1 and the first stepped portion 120 (rising portion for the sash mount), and is a side surface rising from the indoor slab top surface SH1 and the sash mount surface 111. This is the first side to be connected. Reference numeral 114 denotes a side surface rising from the top surface SH2 of the balcony slab at the boundary between the balcony slab S2 and the second stepped portion 130 (rising portion for balcony water return), and connects the top surface SH2 of the balcony slab and the top surface 112 of the balcony step. This is the second aspect. Reference numeral 115 denotes a side surface rising from the balcony step surface 112 at the boundary position of the first step part 120 (rising part for sash frame) and second step part 130 (rising part for balcony water return) in the rising step 110, and This is the third side surface that connects the step top surface 112 and the sash frame top surface 111.

Here, the heights of the indoor slab top surface SH1, the balcony side slab top surface SH2, the balcony step top surface 112, and the sash mount top surface 111 are defined as a first top surface height L1 to a fourth top surface height L4. In this embodiment, the first upper surface height L1 of the indoor side slab upper surface SH1 and the second upper surface height L2 of the balcony side slab upper surface SH2 are designed to be the same height. The two upper surface heights L2 may be different. Further, as shown in FIG. 18, the fourth upper surface height L4 of the sash mount upper surface 111 is set to a position higher than the third upper surface height L3 of the balcony step upper surface 112.

Next, the detailed structure of the assembled formwork unit Y' will be explained. The assembled formwork unit Y' is
A unit assembly including a first buried panel 10 (A), a second buried panel 10 (B), and a third buried panel 10 (C), and these three buried panels 10 are assembled in parallel with a space between each other. be. As shown in FIG. 16, the first buried panel 10 (A) to the third buried panel 10 (C) in the assembled formwork unit Y' are located between the first slab construction area A1 and the second slab construction area A2. It extends along the boundary direction. The first buried panel 10 (A) to the third buried panel 10 (C) are the first buried panel 10 (A), the third buried panel 10 (C), and the second buried panel from the first slab construction planned area A1 side. They are assembled at intervals in the order of 10(B).

The first buried panel 10(A) is a buried panel that forms the first side surface 113 of the rising step 110. Further, the second buried panel 10 (B) is a buried panel that forms the second side surface 114 of the rising step 110. Further, the third buried panel 10 (C) is a buried panel that forms the third side surface 115 of the rising step 110. Further, as shown in FIG. 17, the height dimension from the upper end to the lower end of each of the buried panels 10(A) to (C) is that the first buried panel 10(A) is the largest, and the second buried panel 10(B) is the largest. ) is the next largest, and the third buried panel 10 (C) is the smallest. Further, the distance between the first buried panel 10(A) and the third buried panel 10(C) is not particularly limited, but may be set within a range of 50 to 200 mm, for example. In addition, the distance between the first buried panel 10 (A) and the second buried panel 10 (B) is not particularly limited, but compared to the distance between the first buried panel 10 (A) and the third buried panel 10 (C). For example, the size may be set to be about 50 to 300 mm larger.

In the embodiment shown in FIG. 17, the lower ends 15A and 15B of the first buried panel 10(A) and the second buried panel 10(B) are aligned in height, and these surfaces (back surfaces) 11 are facing each other. It is located. In addition, the first buried panel 10(A) and the third buried panel 10(C) are arranged so that the heights of their upper ends 16A and 16C are aligned with each other, and the surface of the upper area of the first buried panel 10(A) is (Back surface) 11 and the surface (back surface) 11 of the third embedded panel 10(C) are arranged to face each other. Further, as shown in FIG. 17, the first buried panel 10(A) and the second buried panel 10(B) are connected and fixed via a connecting member 20A so as to maintain a predetermined interval, and the first buried panel 10(B) (A) and the third embedded panel 10 (C) are connected and fixed via a connecting member 20B so as to maintain a predetermined interval. In addition, in the prefabricated formwork unit Y', the surface of each buried panel 10(A) to (C) is turned toward the inside of the concrete filling section 80' defined by each buried panel 10(A) to (C). (Back side) 11 is arranged. Similar to the embodiment described above, an adhesion-improving surface may be provided on the surface (back surface) 11 of each embedded panel 10(A) to (C). The adhesion-improved surface has already been described in the above embodiment, so a description thereof will be omitted here.

In the assembled formwork unit Y' in this embodiment, the first buried panel 10(A) forming the first side surface 113 of the rising step 110 has its lower end 15A at the same height as the first upper surface height L1 or the first buried panel 10(A) forming the first side surface 113 of the rising step 110 It is positioned and fixed so as to be disposed at a position lower than the top surface height L1 (the latter mode is shown in FIG. 17). Further, the second buried panel 10 (B) forming the second side surface 114 of the rising step 110 is arranged so that its lower end 15B is at the same height as the second upper surface height L2 or at a position lower than the second upper surface height L2. (The latter mode is shown in FIG. 17). Further, the third buried panel 10 (C) forming the third side surface 115 of the rising step 110 is arranged so that its lower end 15C is at the same height as the third upper surface height L3 or at a position lower than the third upper surface height L3. (The latter mode is shown in FIG. 17). Further, the upper end 16B of the second buried panel 10(B) is arranged at the same height as the third upper surface height L3, and the upper end 16A of the first buried panel 10(A) and the third buried panel 10(C), 16C is arranged at the same height as the fourth upper surface height L4.

FIG. 19 is a diagram showing a formwork unit X' before assembling the assembled formwork unit Y' according to the second embodiment. The connecting member 20A that connects the first buried panel 10 (A) and the second buried panel 10 (B) has a separator part 21 and a male thread part 22 provided at both ends of the separator part 21, and each The first fixture 30 described above is attached to the male threaded portion 22 . In other words, the connecting member 20A has substantially the same structure as the connecting member 20 shown in FIG. 1 except that the separator portion 21 is provided with threaded portions 22 at both ends.

Further, the connecting member 20B that connects the first buried panel 10(A) and the third buried panel 10(C) is the same as the connecting member 20A described above except that the length of the separator portion 21 is different. In addition, in this embodiment, the connection between the buried panel 10 and each connecting member 20A, 20B is reinforced by the second fixture 43 with a flange, in which the flange-shaped head 44 and the male thread part 42 are integrated. In place of the second fixture 43, a second fixture 40 having a separate head 41 and externally threaded portion 42 may be used. Further, each of the buried panels 10(A) to (C) is similar to the buried panel 10 of the embodiment described above, and a through hole through which the male threaded portion 42 is inserted (penetrated) is formed at an appropriate location.

FIG. 20 is a schematic perspective view of the first embedded panel 10(A) according to the second embodiment, viewed from the surface (back surface) 11 side. FIG. 21 is a schematic perspective view of the second buried panel 10 (B) according to the second embodiment, viewed from the surface (back surface) 11 side. FIG. 22 is a schematic perspective view of the third buried panel 10 (C) according to the second embodiment, viewed from the surface (back surface) 11 side. Here, the symbols 16A to 16C are the upper ends of each of the embedded panels 10(A) to (C).

First, as shown in FIG. 20, the first buried panel 10(A) has two levels of through holes formed therein. Reference numeral 13A(1) is a lower through hole formed through the lower stage of the first buried panel 10(A). Reference numeral 13A(2) indicates an upper through hole formed through the upper stage of the first buried panel 10(A). The lower through holes 13A(1) of the first buried panel 10(A) are arranged horizontally in a row (in a straight line) at intervals along the width direction (longitudinal direction) of the first buried panel 10(A). ing. Similarly, the lower through holes 13A(2) of the first buried panel 10(A) are spaced apart in a horizontal line (straight line) along the width direction (longitudinal direction) of the first buried panel 10(A). It is located. In the example shown in FIG. 20, five lower through holes 13A(1) and five upper through holes 13A(2) of the first buried panel 10(A) are provided, and the corresponding lower through holes 13A(2) are provided. 1) and the upper stage through-hole 13A(2) are arranged side by side in the vertical direction. However, in the first buried panel 10(A), the number, position, arrangement pattern, etc. of the lower through-holes 13A(1) and the upper through-holes 13A(2) are not particularly limited, and the aspect shown in FIG. 20 is an example. It is.

Further, as shown in FIG. 21, the second buried panel 10(B) has five through holes 13B arranged horizontally in a row (straight line) along the width direction (longitudinal direction) of the second buried panel 10(B) at intervals. has been done. Further, as shown in FIG. 22, the third buried panel 10(C) has five through holes 13C arranged at intervals along the width direction (longitudinal direction) of the third buried panel 10(C). ing. However, the number, position, arrangement pattern, and other aspects of the through holes 13B and 13C are not particularly limited, and the aspects shown in FIGS. 21 and 22 are examples.

The male threaded portion 42 of the second flanged fixture 43 is inserted (penetrated) into each through hole 13A(1), 13A(2), 13B, 13C of each buried panel 10(A) to 10(C). (If the second fixture 40 is used instead of the second collared fixture 43, the male threaded portion 42, which is separate from the head 41, can be inserted).

Further, reference numeral 9 in FIGS. 17 and 19 is an auxiliary member that holds the lower end portions of the first buried panel 10 (A) and the second buried panel 10 (B). FIG. 23 is a schematic perspective view of the auxiliary member 9 according to the second embodiment. The auxiliary member 9 includes a rectangular band-shaped base plate 91 and panel fitting portions 92 formed at both ends of the base plate 91 in the long side direction. Each panel fitting portion 92 in the auxiliary member 9 has a pair of retaining plates 94 that are arranged to face each other so that a retaining groove 93 having a predetermined groove width W is formed. Each holding plate 94 in the auxiliary member 9 extends in parallel along the width direction (short side direction) of the base plate 91. Further, the retaining plate 94 in each panel fitting portion 92 is vertically erected upward from the upper surface 91A of the base plate 91, and an embedded panel can be fitted into the retaining groove 93. Here, the height dimension H of the holding groove 93 in each panel fitting portion 92 is defined by the height dimension of the holding plate 94. In this embodiment, the lower end region of the first embedded panel 10(A) is fitted into one panel fitting part 92 (holding groove 93) of the auxiliary member 9, and the lower end area of the first buried panel 10(A) is fitted into the other panel fitting part 92 (holding groove 93). By fitting the lower end regions of the two embedded panels 10(B), each of these panels can be held independently. Here, the height dimension H (see FIG. 19) and groove width W of the holding groove 93 in the panel fitting part 92 are such that each embedded panel 10(A), 10(C) can be easily fitted. In addition, each embedded panel 10 (A), 10 (C) fitted in the holding groove 93 is arranged so that the holding position of each buried panel 10 (A), 10 (C) stands on its own approximately perpendicularly to the base plate 91 (the holding position is not tilted excessively diagonally). It is preferable that the Note that the material constituting the auxiliary member 9 is not particularly limited, but metal materials such as stainless steel can be exemplified.

Note that the panel fitting portion 92 of the auxiliary member 9 is formed by forming a retaining groove 93 on the surface of the base plate 91 instead of forming the retaining groove 93 by the gap between the pair of retaining plates 94 protruding from the base plate 91 as in the above configuration. It may be formed by performing groove processing.

Here, the dashed-dotted line shown in FIG. 19 represents the connection relationship between each member included in the formwork unit X'. As shown in FIG. 19, when connecting the first buried panel 10(A) and the second buried panel 10(B) using the connecting member 20A, the lower through hole 13A of the first buried panel 10(A) (1) is used. That is, the end surface 31 for contacting the back surface of the buried panel of the first fixture 30 screwed into the male threaded portion 22 provided at one end of the separator portion 21 in the connecting member 20A is passed through the lower stage of the first buried panel 10(A). The male threaded portion 42 of the second fixture 43 with a flange is inserted into the lower through hole 13A(1) from the surface (outer surface) 12 side while in contact with the surface (back surface) 11 around the hole 13A(1). is screwed into the female threaded portion 33 of the first fixture 30. Further, the end surface 31 for contacting the back surface of the buried panel of the first fixture 30 screwed into the male threaded portion 22 provided at the other end of the separator portion 21 in the connecting member 20A is inserted through the second buried panel 10(B). The male screw of the second fixture with flange 43 is inserted into the through hole 13B from the surface (outer surface) 12 side of the second buried panel 10 (B) while in contact with the surface (back surface) 11 around the hole 13B. The portion 42 is screwed into the female threaded portion 33 of the first fixture 30. Thereby, the first buried panel 10(A) and the second buried panel 10(B) can be connected.

On the other hand, when connecting the first buried panel 10(A) and the third buried panel 10(C) using the connecting member 20B, the upper end through hole 13A(2) of the first buried panel 10(A) is used. It will be done. That is, the end surface 31 for contacting the back surface of the buried panel of the first fixture 30 screwed into the male threaded portion 22 provided at one end of the separator portion 21 in the connecting member 20B is passed through the upper stage of the first buried panel 10(A). A collar with a flange is inserted into the upper through hole 13A(2) from the surface (outer surface) 12 side of the first buried panel 10(A) while in contact with the surface (back surface) 11 around the hole 13A(2). The male threaded portion 42 of the second fixture 43 is screwed into the female threaded portion 33 of the first fixture 30. Further, the end surface 31 for contacting the back surface of the buried panel of the first fixture 30 screwed into the male threaded portion 22 provided at the other end of the separator portion 21 in the connecting member 20B is inserted through the third buried panel 10(C). The male screw of the second fixture with flange 43 is inserted into the through hole 13C from the surface (outer surface) 12 side of the third buried panel 10 (C) while in contact with the surface (back surface) 11 around the hole 13C. The portion 42 is screwed into the female threaded portion 33 of the first fixture 30. Thereby, the first buried panel 10(A) and the third buried panel 10(C) can be connected.

Further, in this embodiment, the lower end regions of the first buried panel 10 (A) and the second buried panel 10 (B) described above are respectively connected to the pair of panel fitting portions 92 (retaining grooves 93) in the auxiliary member 9. Fitted and held.

In addition, the height dimension from the lower end 15A of the first buried panel 10(A) to the center of the lower through hole 13A(1) is the height dimension from the lower end 15B of the second buried panel 10(B) to the center of the through hole 13B. is equal to the dimension. As a result, when assembling the formwork unit X' and installing the assembled formwork unit Y', the heights between the lower ends 15A and 15B of the first buried panel 10 (A) and the second buried panel 10 (B) can be easily adjusted. It can be aligned to Also, the height dimension from the upper end 16A of the first buried panel 10(A) to the center of the upper through hole 13A(2) is the height dimension from the upper end 16C of the third buried panel 10(C) to the center of the through hole 13B. is equal to the dimension. This makes it easy to adjust the heights of the upper ends 16A and 16C of the first buried panel 10 (A) and the third buried panel 10 (C) when assembling the formwork unit X' and installing the assembled formwork unit Y'. It can be aligned to

Next, a method of constructing a concrete structure using the prefabricated formwork unit Y' will be explained. In the construction method of a concrete structure, first, slab reinforcement ST is arranged in the first slab construction area A1 and the second slab construction area A2 (slab reinforcement process). That is, slab reinforcement ST is assembled on a base 101 such as a half precast floor slab (see FIGS. 16, 17, etc.).

Next, the formwork unit X' explained in FIGS. 19 to 23 is assembled, and the assembled formwork unit Y' obtained thereby is installed at a prescribed position as shown in FIGS. ). Specifically, the lower regions of the first buried panel 10 (A) and the second buried panel 10 (B) are connected to each other using the connecting member 20A, the first fixture 30, and the second collared fixture 43. , the upper region of the first buried panel 10(A) and the third buried panel 10(C) are connected using the connecting member 20B, the first fixture 30, and the second collared fixture 43. At this time, the first buried panel 10 (A) and the second buried panel 10 (B) are connected with their surfaces (back surfaces) 11 facing each other. Further, the first buried panel 10 (A) and the third buried panel 10 (C) are connected with their surfaces (back surfaces) 11 facing each other.

In the unit installation process, the lower end regions of the first buried panel 10 (A) and the second buried panel 10 (B) fit into the pair of panel fitting portions 92 (retaining grooves 93) in the auxiliary member 9. It can be assembled in the same condition. The auxiliary member 9 may be fixed such that the first buried panel 10 (A) and the second buried panel 10 (B) held in the panel fitting portion 92 (holding groove 93) are arranged at specified positions. In the example shown in FIG. 17, the base plate 91 of the auxiliary member 9 is positioned and fixed to the slab reinforcement ST via a rod-shaped member or the like. At that time, for example, one end of the reinforcing bar 94 is welded to the base plate 91, and the other end of the reinforcing bar 94 is welded to a non-movable part such as the slab reinforcement ST. The auxiliary member 9 can be fixed in this position and posture. By fixing the auxiliary member 9 in a horizontal position, it is possible to easily fix the first buried panel 10 (A) and the second buried panel 10 (B) with their lower ends aligned at the same height.

In addition, when installing the assembled formwork unit Y', as shown in FIG. It may be fixed. Similarly, the separator portion 21 of the connecting member 20B may be positioned and fixed to a non-movable portion (immovable portion) such as the slab reinforcement ST via the rod-shaped member 95. Further, the auxiliary member 9 is an arbitrary member and does not necessarily need to be provided. There are no particular limitations on the specific means as long as the assembled formwork unit Y' can be positioned and fixed relative to the non-movable part (immovable part). In addition, when the rising step 110 is made of reinforced concrete structure, the prefabricated formwork unit Y
Reinforcement is arranged within the concrete filled section 80' defined by each of the buried panels 10(A) to (C). Reinforcement in the concrete filling section 80' may be performed after or before installation of the prefabricated formwork unit Y'.

When the installation of the prefabricated formwork unit Y' is completed as described above, concrete raw materials are placed at the construction site of the concrete structure (concrete placement process). FIG. 24 is a diagram illustrating the procedure of a concrete placing process according to the second embodiment.

First, as in the slab concrete placing process shown in FIG. 24(a), concrete raw material (fresh concrete) Cr1 is placed in the first slab construction area A1 and the second slab construction area A2. At this time, the first slab construction area A1 is filled with concrete raw material Cr1 up to the first top surface height L1, and the second slab construction area A2 is filled with concrete raw material Cr1 up to the second top surface height L2. Filled. As mentioned above, the lower ends of each of the first buried panel 10 (A) and the second buried panel 10 (B) in the assembled formwork unit Y' are higher than the first upper surface height L1 and the second upper surface height L2. placed in a low position. Therefore, at the completion of the slab concrete placing process shown in FIG. 24(a), the lower end regions of each buried panel 10(A), 10(B) are buried in the concrete raw material Cr1.

Next, concrete raw material (fresh concrete) is filled inside the concrete filling section 80'. Specifically, first, as shown in FIG. 24(b), the concrete filling section 80' is filled with concrete raw material Cr2 up to the third upper surface height L3 (rising first concrete placing step). As shown in FIG. 17, in the assembled formwork unit Y', the upper part of the concrete filling section 80' is open. Therefore, in the rising first concrete placing step, for example, the concrete raw material Cr2 is poured into the concrete filling section 80' from the upper opening formed between the second buried panel 10 (B) and the third buried panel 10 (C). May be filled. Here, the first rising concrete casting step may be performed continuously before the concrete raw material Cr1 cast in the previous step is hardened, that is, following the casting of the concrete raw material Cr1.

As described above, when filling the concrete filling section 80' with the concrete raw material Cr2 up to the third upper surface height L3, the lower end regions of each buried panel 10(A), 10(B) are buried in the concrete raw material Cr1. The situation is as follows. Therefore, when raising the concrete raw material Cr2 to the third upper surface height L3 in the first concrete placing step, from the concrete filling section 80' side, the first slab construction area A1 and the second slab construction area A2 are first filled. It is possible to suppress leakage (protrusion) of the concrete raw material Cr2 into the planned area R11. As a result, the expected height difference formed by the first side surface 113 (outer surface of the first buried panel 10(A)) of the first step part 120 (rising part for sash frame) in the rising step 110 and the indoor slab upper surface SH1 It is possible to suitably suppress the formation of an extra inclined portion compared to the corner shape. Similarly, the desired area formed by the second side surface 114 (outer surface of the second buried panel 10 (B)) of the second step part 130 (rising part for balcony water return) in the rising step 110 and the balcony side slab upper surface SH2 It is possible to suitably suppress the formation of an extra inclined portion compared to the corner shape. In addition, as mentioned above, since leakage of the concrete raw material Cr2 does not occur, there is no need for scraping off the excess parts caused by this leakage (scooping work) or subsequent repair work as necessary, and the work required for construction. Time and costs can be reduced.

When the first concrete placing step is completed as described above, next, as shown in FIG. 24(c), the concrete filling section 80' is filled with concrete raw material Cr3 up to the fourth upper surface height L4. (Rising second concrete placement process). For example, the concrete raw material Cr3 may be filled into the concrete filling section 80' through the upper opening formed between the first buried panel 10(A) and the third buried panel 10(C). At this time, the concrete raw material Cr3 may be poured continuously before the concrete raw material Cr3 cast in the previous step is hardened, for example following the casting of the concrete raw material Cr2.

Here, of the concrete filling section 80', the area filled with the concrete raw material Cr3 in the rising second concrete placing step is particularly referred to as "the concrete filling section 80A for sash frame." In the rising second concrete placing step, the concrete filling section 80A for the sash frame is filled with concrete raw material Cr3 from a state where the lower end area of the third buried panel 10(C) is buried in the concrete raw material Cr2. According to this, when the concrete filling section 80A for sash mounts is filled with concrete raw material Cr3 up to the fourth top surface height L4, the concrete raw material Cr3 leaks from the sash mount concrete filling section 80A side to the balcony step top surface 112. (protrusion) can be suppressed. As a result, the expected height difference formed by the third side surface 115 (outer surface of the third buried panel 10 (C)) of the second step part 130 (rising part for balcony water return) in the rising step 110 and the upper surface 112 of the balcony step. It is possible to suitably suppress the formation of an extra inclined portion compared to the corner shape. Furthermore, accompanying this, there is no need for scraping off the excess concrete portion (scraping work) or subsequent repair work as necessary, making it possible to reduce the work, time, and cost required for construction.

Through the above steps, slabs (indoor slab S1 and balcony slab S2) each having a raised concrete step 110 protruding from the upper surface can be constructed at once by pouring concrete. As a result, not only can the number of man-hours (days) for constructing the above-mentioned concrete structure be shortened, but also the construction of a concrete structure with excellent waterproofness, strength, and durability can be expected by integrating the concrete structure.

Of course, in each of the above-mentioned concrete placing processes, there is compaction for densely filling the supplied concrete raw materials, and concrete surfaces at various places (indoor side slab top surface SH1, balcony side slab top surface SH2, sash frame top surface 111, Finishing of the veranda step top surface 112, etc.) can be performed as necessary. Of course, the balcony side slab top surface SH2, the balcony step top surface 112, etc. may have a water slope in consideration of drainage of rainwater etc. when finishing the concrete surface. Thereby, it is possible to suppress rainwater and the like from accumulating on the balcony side slab top surface SH2 and the balcony step top surface 112.

In addition, as shown in FIG. 17, since the lower region of the third buried panel (C) is buried in the concrete raw material Cr2, in the lower region, not only the surface (back) 11 side but also the surface (outer surface) 12 An adhesion-improving surface may also be provided on the side.

Furthermore, in this embodiment, the first side surface 113, the second side surface 114, and the third side surface 115 of the rising step 110 are all formed by the respective buried panels 10(A) to 10(C), so that the conventional As such, there is no need to remove the removable panels from the mold after pouring concrete, reducing the work, time, and cost required for construction. In addition, the second fixtures with flanges 43 used for fixing each of the buried panels 10(A) to 10(C) may be left as they are after concrete is poured, or may be removed after a predetermined curing period. . The female threaded portion 33 of the first fixture 30 and the through holes of each buried panel exposed by removing the second fixture 43 with flanges from the first fixture 30 may be filled with mortar or the like.

As described above, the formwork unit X' in this embodiment is used for constructing slabs (indoor slab S1 and balcony slab S2) having raised concrete steps 110 protruding from the upper surface. a plurality of embedded panels 10(A) to 10(C), and a plurality of connecting members 20A and embedded panels 10 that interconnect the embedded panels 10(A) and 10(B).
(A), 10(C), a plurality of first fixtures 30, and a plurality of second fixtures with flanges 43, each of the connecting members 20A, 20B, It has a separator part 21 and male thread parts 22 provided at both ends of the separator part 21.

Also, in the formwork unit X' according to the second embodiment, similarly to the embodiments described above, in each of the buried panels 10(A) to 10(C), the flange-shaped head of the second fixture with flange 43 is Area of contact of part 44 with the surface of the buried panel (in the case of using a combination of second fixture 40 and collar 23 instead of second fixture with flange 43, area of contact of collar 23 with the surface of the buried panel) The total contact area of the first fixture 30 to the back surface of the buried panel is set to be 2% or more of the surface area of one side of the buried panel. Therefore, the effect of reinforcing the connection between each buried panel 10(A) to 10(C) and each connecting member 20A, 20B is excellent, and it is possible to withstand higher lateral pressure during concrete pouring.

The assembled formwork unit Y' according to the second embodiment is
To form the first side surface 113 of the first stepped portion 120 that is installed on the first slab construction area A1 side where the indoor slab (first slab area) S1 is constructed and rises from the upper surface SH1 of the indoor slab S1. a first buried panel 10(A);
To form the second side surface 114 of the second stepped portion 130 that is installed on the second slab construction planned area A2 side where the balcony side slab (second slab area) S2 is constructed and rises from the upper surface SH2 of the balcony side slab S2. a second buried panel 10(B);
The third buried panel 10 (C) is set between the first buried panel 10 (A) and the second buried panel 10 (B) and is used to form the third side surface 115 rising from the upper surface 112 of the second stepped portion 130. )and,
A connecting member 20A, a first fixture 30, and a second fixture 43 (second fixture 40) and
A connecting member 20B, a first fixture 30, and a second fixture 43 (second fixture 40) and,
The lower end 15A of the first buried panel 10(A) is arranged at a position equal to or lower than the first upper surface height L1 corresponding to the upper surface SH1 of the indoor slab S1,
The lower end 15B of the second buried panel 10(B) is arranged at a position equal to or lower than the second upper surface height L2 corresponding to the upper surface SH2 of the balcony side slab S2,
The lower end 15C of the third buried panel 10(C) is arranged at a position equal to or lower than the third upper surface height L3 corresponding to the upper surface 112 of the second stepped portion 130.
According to the assembled formwork unit Y', the number of man-hours (days) for constructing a concrete structure can be shortened by unitizing a plurality of buried panels. Also, when concrete is poured into the first slab construction area A1 and the second slab construction area A2, concrete is formed on the back surface 11 side of the first buried panel 10(A) to third buried panel 10(C). By pouring concrete into the filling section 80', the rising step 110 as a composite step structure including the rising section 120 for the sash frame and the rising section for veranda water return (second step section 130) is formed into the slab S1, It can be constructed at the same time as S2 (with one concrete pour). According to this, concrete is poured to construct the slab (indoor side slab S1, balcony side slab S2), the first step part 120 (rising part for sash frame), and the second step part 130 (rising part for balcony water return). Each part can be constructed all at once without forming any joints, making it possible to construct a concrete structure with excellent waterproofness, strength, and durability.

Example 5
Example 5 (an example corresponding to Embodiment 2) will be described below. In Example 5, when pouring slabs, as explained in the above-mentioned Embodiment 2, the first slab construction area A1 where the indoor slab S1 is constructed and the second slab where the balcony slab S2 is constructed. An assembled formwork unit Y', which is assembled from the following formwork unit X', will be installed at the boundary of the planned construction area A2, and the assembled formwork unit Y' will include a rising part for the sash frame and a rising part for the veranda water return. A rising step 110 as a composite step structure was constructed at the same time as the slabs S1 and S2.

The following was used as the formwork unit X'.
Embedded panel: "Cell Slim Step Board" manufactured by Daicel Finechem Co., Ltd. (longitudinal dimension x thickness dimension = 1820 mm x 6.5 mm) was used.
The first buried panel 10 (A) is placed on the side of the first slab construction area A1 at the boundary between the concrete filling section 80' defined inside the assembly formwork unit Y' and the first slab construction area A1. , the second buried panel 10 (B), the first buried panel 10 (A), and the second buried panel 10 (B), which are arranged on the side of the second slab construction area A2 at the boundary between the concrete filling section 80' and the second slab construction area A2. The height dimensions (dimensions in the short direction perpendicular to the longitudinal direction and the thickness direction) of the third buried panel 10 (C) arranged between the two buried panels 10 (B) were 170 mm, 130 mm, and 70 mm, respectively.

As shown in FIG. 20, the first buried panel 10(A) has five through holes arranged horizontally in a horizontal row along the panel width direction (longitudinal direction), with five through holes spaced apart from each other. The upper through-hole and the lower through-hole were arranged side by side in the vertical direction.
As shown in FIG. 21, five through holes in the second buried panel 10(B) were arranged at intervals in a horizontal row along the panel width direction (longitudinal direction).
As shown in FIG. 22, five through-holes in the second buried panel 10(B) were arranged in a horizontal row at intervals along the panel width direction (longitudinal direction).

First fixing device: KP conduit pad manufactured by Sankyo Tech Co., Ltd. (area of the end surface for contacting the back surface of the embedded panel: 19.6 cm ² / piece) was used.
Second fixture with flange: A slim head screw with a flange (area of the end surface for contacting the buried panel surface: 1.3 cm ² /piece) was used.
Connecting member: A separator part with external threads provided at both ends was used.
Auxiliary member: As a base plate, a rectangular thin plate made of stainless steel with a thickness of about 1.1 mm and holding grooves with a height H of about 7 mm and a groove width W of about 7 mm formed at both ends was used.

The first buried panel 10 (A) and the second buried panel 10 (B) were assembled in parallel using the first fixture, the second fixture with a flange, and the second fixture with a flange so that their back surfaces faced each other. . When assembling the first buried panel 10(A) and the second buried panel 10(B), the lower through hole of the first buried panel 10(A) is used to assemble the first buried panel 10(A) and the second buried panel 10(B). Both panels were assembled so that the heights of the lower ends of the panels 10(B) were the same and the distance from each other was 300 mm. Further, the lower ends of the first buried panel 10(A) and the second buried panel 10(B) were fitted into the holding grooves of the auxiliary member, thereby attaching both panels to the auxiliary member. In addition, four auxiliary members are prepared, and the four auxiliary members are placed at intervals along the panel width direction (longitudinal direction) at the lower ends of the first buried panel 10 (A) and the second buried panel 10 (B). It was installed on.

In addition, using the first fixture, the second fixture with a flange, and the second fixture with a flange, the first buried panel 10 (A) and the third buried panel 10 (C) are placed in parallel so that their back surfaces face each other. Assembled. When assembling the first buried panel 10(A) and the third buried panel 10(C), the upper end through hole of the first buried panel 10(A) is used to assemble the first buried panel 10(A) and the third buried panel 10(C). Both panels were assembled so that the heights of the upper ends of the panels 10(C) were the same and the distance from each other was 100 mm.

As described above, the assembled formwork unit Y' in which the first buried panel 10 (A) to the third buried panel 10 (C) are assembled is used to construct the first slab construction area where the indoor side slab will be constructed and the balcony side slab. It was installed at the boundary with the area where the second slab is planned to be constructed, that is, at the location where a rising step is to be constructed, including the rising part for the sash frame and the rising part for the balcony water return, which will serve as the frame for attaching the sash frame. The assembly formwork unit Y' was fixed by welding the separator portions of some of the connecting members used to connect the buried panels and the base plates of some of the auxiliary members to the slab reinforcement. At that time, the buried panel contact area of the flange part (flange type head) of the second fixture with flange in each buried panel 10(A) to 10(C), and the area of the buried panel back surface contact of the first fixture. The total contact area of the end surface of the buried panel is approximately 7% of the surface area of one side of the first buried panel 10 (A), approximately 4% of the surface area of one side of the second buried panel 10 (B), and the total area of the buried panel of the third buried panel. It was about 8% of the surface area of one side in 10(C).

Then, the rising steps including the rising part for the sash mount and the rising part for the balcony water return, the indoor slab, and the balcony side slab were constructed by pouring concrete at once. As a result, there was no need for chisel work or repair work associated with the protrusion of concrete from the prefabricated formwork unit Y'. Further, the shape and dimensions of the space formed by the assembled formwork unit Y' were as designed.

X Formwork unit Y Assembly formwork unit 10 Buried panel 11 Buried panel back side 12 Buried panel front side 13 Buried panel hole (or through hole)
14 Anchor bolt 20 Connecting member 21 Separator portion 22 Male thread portion 23 Flange 23A End surface of the collar for contacting the buried panel surface 24 Hole in the collar 30 First fixture 31 End surface for contacting the back surface of the buried panel 32 Convex main body 33 First Female screw part 34 of fixture pedestal part 40 Second fixture 41 Head 42 Male thread part 43 Second fixture with flange 44 Flange-shaped head 50A, 50B Connector 51, 53 Flat plate 52, 54 Fastening material 60A, 60B Height adjuster 61, 64 Receiving member 62, 65 Leg member 63, 66 Connecting metal fitting 70 Beam 71 Ceiling 72 Window frame 73 Renovated surface of concrete structure 74 Ground 75 Wall 76 Tread or floor surface of rising step 77 Rising step Top surface 80 Concrete (raw material) filling section 81 Steel frame or reinforcing bars

Claims (16)

A formwork unit for pouring concrete without using formwork support,
A buried panel, a connecting member, a first fixture, a collar, and a second fixture,
The connecting member has a separator part and a male thread part provided at one end of the separator part,
The second fixture has a head and a male thread,
The buried panel has a hole through which the male threaded portion of the second fixture can pass,
The collar has a hole through which the male threaded portion of the second fixture can pass, and an end surface for contacting the buried panel surface,
The first fixture is a convex member having an end surface for contacting the back surface of the buried panel, and the first fixture is a convex member that is screwed into the shaft portion of the convex member with the male threaded portion of the connecting member and the male threaded portion of the second fixture. has a threaded part,
The total of the contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 2% or more of the surface area of one side of the buried panel,
Formwork unit for concrete pouring. The total of the contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 5% or more of the surface area of one side of the buried panel,
The formwork unit according to claim 1, wherein the formwork unit is a formwork unit that forms a formwork for concrete pouring by assembling a plurality of embedded panels in a row in a height direction so as to be flush with each other. . The formwork unit according to claim 1 or 2, comprising a second fixture with a flange having a flange-shaped head and a male screw portion in place of the flange and the second fixture. The formwork unit according to any one of claims 1 to 3, wherein the embedded panel has a longitudinal dimension of 2000 mm or less, a lateral dimension of 1000 mm or less, and a thickness of 15 mm or less. The thickness of the buried panel is 15 mm or less,
Any one of claims 1 to 4, wherein the formwork unit is a formwork unit that forms a formwork for concrete pouring by assembling a plurality of embedded panels in a row in a height direction so that they are flush with each other. The formwork unit described in section. The formwork unit according to any one of claims 1 to 5, wherein among the surfaces of the buried panel, the surface installed toward the inside of the concrete-filled section includes an adhesion-improved surface. The formwork unit according to any one of claims 1 to 6, further comprising a connecting tool for connecting two adjacent buried panels in series so that they are flush with each other. The formwork unit according to any one of claims 1 to 7, further comprising a connecting tool for connecting two adjacent buried panels in a manner perpendicular to each other. The formwork unit according to any one of claims 1 to 8, further comprising a height adjuster for adjusting the height position of the buried panel. The formwork unit according to any one of claims 1 to 9, which is a formwork unit for pouring concrete structures having a step structure of 1 m or less. An assembled formwork unit for forming a formwork for pouring concrete without using formwork support,
A buried panel, a connecting member, a first fixture, a collar, and a second fixture,
The connecting member has a separator part and a male thread part provided at one end of the separator part,
The second fixture has a head and a male thread,
The buried panel has a hole through which the male threaded portion of the second fixture can pass,
The collar has a hole through which the male threaded portion of the second fixture can pass, and an end surface for contacting the buried panel surface,
The first fixture is a convex member having an end surface for contacting the back surface of the buried panel, and the first fixture is a convex member that is screwed into the shaft portion of the convex member with the male threaded portion of the connecting member and the male threaded portion of the second fixture. has a threaded part,
The total contact area of the collar to the surface of the buried panel and the contact area of the first fixture to the back surface of the buried panel is 2% or more of the surface area of one side of the buried panel,
The male threaded part of the second fixture is inserted into the hole of the buried panel from the front side of the buried panel with the collar in between, and the male threaded part of the second fixture that protrudes from the back side of the buried panel and the connecting member. The male threaded portion of the embedding panel is screwed to the female threaded portion of a first fixture whose end surface is in contact with the back surface of the buried panel. A method for constructing a concrete structure by pouring concrete using the assembled formwork unit according to claim 11,
Step 1 of arranging the prefabricated formwork unit so that the front side of the buried panel of the prefabricated formwork unit forms at least one surface of the concrete structure to define a section to be filled with concrete raw materials;
Step 2 of fixing the assembled formwork unit by connecting the end of the separator part of the arranged assembled formwork unit with a non-movable part located inside the concrete filling section to form a formwork;
A method for constructing a concrete structure, comprising a step 3 of supplying a concrete raw material into the formed formwork. 13. The concrete structure construction method according to claim 12, wherein the concrete structure is a concrete structure having a step structure of 1 m or less. 14. The method for constructing a concrete structure according to claim 12, wherein the concrete structure is at least one type of structure made of concrete selected from stairs, rising steps, thresholds, and beams. A method for repairing a concrete structure by pouring concrete using the assembled formwork unit according to claim 11, comprising:
Step 1' of forming a formwork by fixing the end of the separator part of the assembled formwork unit to the surface to be repaired of the concrete structure;
A method for repairing a concrete structure, comprising a step 2' of supplying a concrete raw material into the formed formwork. A concrete structure, wherein the embedded panel included in the formwork unit according to any one of claims 1 to 10 forms at least one surface selected from the top surface, bottom surface, and side surface of the concrete structure.

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