Formwork set and construction method

Abstract

To improve workability.SOLUTION: A formwork set forms casting space SP where concrete is poured. This formwork set comprises: a first formwork panel 2, which forms one side of the casting space SP; two second formwork panels 3, each of which forms the opposing other side of the casting space SP; a connecting material 5 that connects two second formwork panels 3 arranged vertically; and a separator 6 that crosses the casting space SP and sets the width between the first formwork panel 2 and the two second formwork panels 3 to a specific width. The separator 6 and the connecting material 5 are provided with a coupling structure 100 for temporarily fixing the separator 6 and the connector 5.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a formwork set for forming a pouring space into which concrete is poured, and a construction method thereof. [Background technology]

[0002] Conventionally, when constructing a foundation for a house or the like, a form set is used to form a pouring space into which concrete is poured. Such a form set generally includes first and second form panels and a separator, as described below. The first and second form panels respectively define opposing side surfaces of the casting space. The separator traverses the casting space and sets a specific width between the first and second form panels.

[0003] In addition, in the construction of a foundation having a comparatively high foundation height, a formwork set adapted to the foundation height is known (see, for example, Patent Document 1). In the form set described in Patent Document 1, first form panels are stacked vertically and the two first form panels are joined together by bolts or the like to be treated as a single form panel. Similarly, second form panels are stacked vertically and the two second form panels are joined together by bolts or the like to be treated as a single form panel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-068798 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when constructing a foundation with a relatively high foundation height, the height of the two formwork panels that are joined together vertically is high, making it difficult to insert one's hand into the pouring space from above the two formwork panels to attach the separator, making it difficult to improve workability.

[0006] The present invention has been made in consideration of the above, and has an object to provide a formwork set and a construction method that can improve workability. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the formwork set of the present invention is a formwork set that forms a pouring space into which concrete is poured, and comprises a first formwork panel that forms one side of the pouring space, two second formwork panels that each form the opposing other side of the pouring space, a connecting member that connects the two second formwork panels in a vertically arranged state, and a separator that crosses the pouring space and sets the width between the first formwork panel and the two second formwork panels to a specific width, and is characterized in that the separator and the connecting member are provided with an engagement structure for temporarily fixing the separator and the connecting member.

[0008] In addition, the construction method of the present invention includes a first form panel installation step of installing a first form panel that forms one side of the pouring space into which concrete is poured, a second lower form panel installation step of installing a second lower form panel that forms the underside of the other side of the pouring space, a connecting material installation step of installing a connecting material to the second lower form panel, a second upper form panel installation step of connecting a second upper form panel that forms the upper side of the other side of the pouring space to the upper side of the second lower form panel with the connecting material, and a separator installation step of engaging a separator that crosses the pouring space and sets the width between the first form panel and the second lower form panel and the second upper form panel to a specific width with the connecting material and temporarily fixing it to the connecting material, and the second upper form panel installation step is characterized in that the separator installation step is performed after the separator installation step.

[0009] The construction method according to the present invention includes a first lower form panel installation step of installing a first lower form panel that forms the underside of one side of a pouring space into which concrete is poured, a first connecting member installation step of installing a first connecting member to the first lower form panel, a first upper form panel installation step of connecting a first upper form panel that forms the upper side of one side of the pouring space to the upper side of the first lower form panel with the first connecting member, a second lower form panel installation step of installing a second lower form panel that forms the underside of the other side of the pouring space, a second connecting member installation step of installing a second connecting member to the second lower form panel, and a second connecting member installation step of connecting a first upper form panel that forms the upper side of the other side of the pouring space to the upper side of the first lower form panel. the second upper form panel installation step of connecting a second upper form panel to the upper side of the second lower form panel with the second connecting member; and a separator installation step of engaging a separator which crosses the pouring space and sets the width between the first lower form panel and the first upper form panel and the second lower form panel and the second upper form panel to a specific width with the first connecting member and the second connecting member, respectively, thereby temporarily fixing the separator to the first connecting member and the second connecting member, respectively, and at least one of the first upper form panel installation step and the second upper form panel installation step is performed after the separator installation step. Effect of the Invention

[0010] According to the formwork set and construction method of the present invention, construction efficiency can be improved. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a diagram showing a form set according to the embodiment. [Diagram 2] FIG. 11 is a diagram illustrating the configuration of a second formwork panel. [Diagram 3] FIG. 11 is a diagram illustrating the configuration of a second formwork panel. [Figure 4] FIG. 2 is a diagram illustrating a configuration of a formwork jig. [Diagram 5] FIG. 4 is a diagram illustrating the configuration of a connecting material. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. 11 is a diagram for explaining a first modified example of the embodiment. [Figure 11] FIG. 11 is a diagram for explaining a first modified example of the embodiment. [Figure 12] FIG. 11 is a diagram for explaining a first modified example of the embodiment. [Figure 13] FIG. 11 is a diagram for explaining a first modified example of the embodiment. [Figure 14] FIG. 11 is a diagram for explaining a first modified example of the embodiment. [Figure 15] FIG. 11 is a diagram for explaining a first modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, a mode for carrying out the present invention (hereinafter, referred to as an embodiment) will be described with reference to the drawings. Note that the present invention is not limited to the embodiment described below. Furthermore, in the description of the drawings, the same parts are given the same reference numerals.

[0013] [Outline of the formwork set] Fig. 1 is a diagram showing a formwork set 1 according to an embodiment. Specifically, Fig. 1 is a diagram showing the formwork set 1 as viewed from a horizontal direction perpendicular to the opposing direction of a pair of side surfaces in a pouring space SP where concrete is poured. Fig. 1 shows a state after the formwork set 1 is assembled and concrete is poured during construction of a foundation for a house. The formwork set 1 is used for constructing the foundation of a house or the like. Here, examples of the foundation include a mat foundation or a strip foundation for a detached house or the like. In this embodiment, the foundation is a relatively high foundation with a foundation height of about 1500 mm. This formwork set 1 includes a first formwork panel 2, a second formwork panel 3, a formwork jig 4, and a connecting member 5.

[0014] The first form panel 2 is a form panel that forms one side of the pouring space SP where concrete is poured. In this embodiment, the first form panel 2 is a flat panel such as a steel plate, a resin plate, or a wooden plywood (conpane), and forms the outer periphery of the pouring space SP. The outer periphery of the pouring space SP is formed by arranging a plurality of first form panels 2 in a state in which the surfaces of the first form panels 2 are parallel to the vertical direction and connected in a horizontal direction. In this embodiment, as described above, the foundation height is high at about 1500 mm, but two first form panels 2 are not arranged vertically, and only one first form panel 2 is used in the vertical direction.

[0015] Figures 2 and 3 are diagrams for explaining the configuration of the second form panel 3. Specifically, Figure 2 is a perspective view of the second form panel 3. Figure 3 is an enlarged perspective view showing the connection structure between plate pieces 31 in the second form panel 3. The second formwork panel 3 is a formwork panel that forms the other opposing side surface of the casting space SP. In this embodiment, as described above, the foundation height is as high as about 1500 mm, and the two second formwork panels 3 are arranged vertically to correspond to the foundation height. In this embodiment, the second formwork panel 3 is a panel whose corrugated cross section is continuous in a horizontal direction perpendicular to the opposing direction of a pair of side surfaces in the casting space SP, and forms the inner peripheral surface of the casting space SP. The second formwork panel 3 is composed of a plurality of strip-shaped plate pieces 31 assembled so that their long sides 311 are adjacent to each other. That is, the second formwork panel 3 has a so-called slat structure, and the long sides 311 of adjacent plate pieces 31 are connected to each other so as to be rotatable with respect to the direction along the long sides 311.

[0016] The plate piece 31 is, for example, a pressed steel plate. Specifically, the plate piece 31 has hook portions 311a and 311b along a pair of long sides 311. The hook portions 311a and 311b of adjacent plate pieces 31 engage with each other to be rotatably connected. These hook portions 311a and 311b each have a thin shape formed by an arc of approximately 360°. Here, the hook portion 311a along one long side 311 is slightly smaller than the hook portion 311b along the other long side 311. In other words, the hook portions 311a and 311b are configured to be engageable with each other due to the difference in size.

[0017] Further, the plate piece 31 has a flat portion 312 and a pair of inclined portions 313 each inclined from both ends of the flat portion 312 toward one surface 312a of the flat portion 312, with each end edge being a long side 311. Here, a linear bending line 314 is formed in the center of the flat portion 312 along the longitudinal direction.

[0018] Furthermore, a cutout portion 315 without the hook portion 311a is formed at the end of one long side 311 of the plate piece 31. At the end of the other long side 311 of the plate piece 31, the end of the hook portion 311b exposed to the outside through the cutout portion 315 has a retaining portion 316 that tightens the hook portion 311b. The retaining portion 316 abuts against the end face of the hook portion 311a of the adjacent plate pieces 31, restricting the displacement of the plate pieces 31 and maintaining the connected state. The retaining portion 316 can be easily formed by a tool such as pliers. The retaining portion 316 can also be returned to the original shape of the hook portion 311b by the same tool, or can be cut off. That is, by returning the retaining portion 316 to the original shape of the hook portion 311b or by cutting it off, the adjacent plate pieces 31 can be separated, and the second form panel 3 can be shortened as required. Furthermore, by forming the retaining portion 316 by engaging the hook portions 311a, 311b with each other, the second form panel 3 can be lengthened as required. These operations can be easily performed at the construction site with simple tools.

[0019] The second form panel 3 described above is conceptually similar to two poles existing concentrically, since the hook parts 311a, 311b are engaged with each other in the form of a spiral arc over a large angle range. Therefore, the second form panel 3 is strong and resistant to warping, and can withstand the internal pressure acting during concrete pouring. In addition, the plate piece 31 has a trapezoidal cross section having a flat part 312 and a pair of inclined parts 313 from both ends of the flat part 312 to the long side 311, making it even more resistant to bending. Furthermore, the plate piece 31 has linear bending muscles 314 formed on the flat part 312 along the longitudinal direction, making it even stronger.

[0020] The second form panel 3 is composed of multiple plate pieces 31, and the long sides 311 of adjacent plate pieces 31 are rotatably connected to each other, so that the second form panel 3 can be stored and transported by being wound up in a roll. Also, the second form panel 3 can be installed while being unwound from the rolled state, improving workability.

[0021] The formwork jig 4 sets the width between the first formwork panel 2 and the two vertically aligned second formwork panels 3 to a specific width, and maintains the strength of the formwork set 1. The detailed configuration of the formwork jig 4 will be described later in "Configuration of the formwork jig."

[0022] The connecting material 5 connects the two second form panels 3 arranged vertically. The detailed structure of the connecting material 5 will be described later in the section "Structure of the connecting material".

[0023] [Configuration of formwork jig] 4 is a diagram for explaining the configuration of the formwork jig 4. Specifically, FIG. 4 is an enlarged view of a part of FIG. The formwork jig 4 includes a separator 6 and first and second holders 7 and 8 .

[0024] The separator 6 crosses the casting space SP and sets a specific width between the first form panel 2 and the two second form panels 3 arranged vertically. The separator 6 includes a rod-shaped member 61 and an engaging member 62.

[0025] The rod-shaped member 61 is inserted into a through hole H1 that penetrates the front and back of the first form panel 2. The rod-shaped member 61 has a configuration in which a pair of cylindrical rod-shaped portions 611, 612 are connected by a connecting portion 613 so as to be aligned in a straight line. In this embodiment, the connecting portion 613 is made of a P-con.

[0026] The engaging member 62 is connected to the rod-shaped member 61 (rod-shaped portion 611) and engages with the connecting material 5. The engaging member 62 includes a rising piece 621, a fixing portion 622, a flat portion 623, and an engaging protrusion 624.

[0027] The rising piece 621 is configured by a flat plate having a rectangular shape in a plan view. The rising piece 621 is formed with an insertion hole 621a penetrating from the front to the back.

[0028] The fixing portion 622 connects (fixes) the rising piece 621 and the rod-shaped portion 611. In this embodiment, the fixing portion 622 is configured by a nut. Then, the fixing portion 622 connects the rising piece 621 and the rod-shaped portion 611 by inserting one end of the rod-shaped portion 611 into the insertion hole 621a and being fixed to a thread groove (not shown) formed on the outer circumferential surface of the one end.

[0029] The flat portion 623 has a flat plate shape that protrudes from the outer edge of the standing piece 621 (the upper end when the separator 6 is in use) by bending at approximately 90° toward one surface 621b of the standing piece 621. The one surface 621b is the surface that faces the second form panel 3 when the separator 6 is in use.

[0030] The engaging protrusion 624 is a protrusion that protrudes from the tip of the flat portion 623 and is bent at approximately 90° toward one surface 623a of the flat portion 623, and is a portion that engages with the connecting material 5. The one surface 623a faces downward when the separator 6 is in use.

[0031] The first retainer 7 is connected to the separator 6 (rod-shaped portion 612) protruding from the surface of the first form panel 2 opposite the pouring space SP through the through hole H1 of the first form panel 2. The first retainer 7, together with the two thick end members 9, maintains the strength of the first form panel 2 side of the form set 1. The first retainer 7 includes a threaded rod 71, a presser 72, and a fixing nut 73.

[0032] The threaded rod 71 has a cylindrical shape and is connected to one end of the rod-shaped portion 612. More specifically, a screw hole (not shown) is formed in one end of the threaded rod 71. Then, the threaded rod 71 is connected to one end of the rod-shaped portion 612 by screwing a screw groove formed on the outer circumferential surface of one end of the rod-shaped portion 612 into the screw hole.

[0033] The presser 72 presses the two thick end materials 9 against the first form panel 2. An insertion hole 721 through which the threaded rod 71 is inserted is formed in the presser 72. The presser 72 is attached to the threaded rod 71 with the threaded rod 71 inserted through the insertion hole 721. The presser 72 is further formed on the surface facing the first form panel 2 with a pair of contact surfaces 722 corresponding to the outer shapes of the two thick end materials 9.

[0034] The fixing nut 73 is screwed into a thread groove (not shown) formed on the outer circumferential surface of the threaded rod 71. Then, by tightening the fixing nut 73, the two thick end materials 9 are fixed between the retainer 72 and the first form panel 2.

[0035] The second retainer 8 is connected to the connecting member 5 and corresponds to the retainer according to the present invention. The second retainer 8, together with the two thick end members 9, maintains the strength of the second form panel 3 side in the form set 1. The second retainer 8 includes a threaded rod 81, a clamp 82, a fixing nut 83, and a rod-shaped member 84. The threaded rod 81, the clamp 82, and the fixing nut 83 have the same configuration as the threaded rod 71, the clamp 72, and the fixing nut 73 in the first retainer 7 described above. That is, the clamp 82 has an insertion hole 821 similar to the insertion hole 721 and a pair of abutment surfaces 822 similar to the pair of abutment surfaces 722.

[0036] The rod-shaped member 84 has a cylindrical shape and is connected to the connecting member 5. More specifically, a screw groove (not shown) is formed on the outer circumferential surface of one end of the rod-shaped member 84. The rod-shaped member 84 is connected to one end of the threaded rod 81 by screwing the screw groove into a screw hole (not shown) formed in one end of the threaded rod 81. A nut 841 is fixed to the other end of the rod-shaped member 84 by welding. The rod-shaped member 84 is connected to the connecting member 5 by the nut 841.

[0037] [Structure of connecting material] 5 is a diagram for explaining the configuration of the connecting material 5. Specifically, FIG. 5 is an enlarged view of a part of FIG. The connecting material 5 is made of an extruded material made of metal such as aluminum, and has a substantially uniform cross-sectional shape over its entire length. On the other side of the casting space SP, the connecting material 5 has a substantially uniform overall length in a horizontal direction perpendicular to the direction facing the pair of side surfaces of the casting space SP. The connecting material 5 includes a base 51, a first groove 52, a second groove 53, and a fin 54.

[0038] The base portion 51 includes a first side wall portion 511 , a pair of second side wall portions 512 , a pair of protruding pieces 513 , and a groove forming portion 514 . The first side wall portion 511 has a flat plate shape extending in the up-down direction. The pair of second side wall portions 512 protrude from the upper and lower ends of the first side wall portion 511 while being bent at approximately 90° toward the first side wall portion 511, and extend so as to face each other. The pair of protruding pieces 513 are portions that protrude from the ends of the pair of second side wall portions 512 in directions approaching each other. The groove forming portion 514 is a portion that extends from the pair of second side wall portions 512 at a position between the first side wall portion 511 and the pair of protruding pieces 513 so as to connect the pair of second side wall portions 512 to each other.

[0039] The pair of second side wall portions 512 and groove forming portion 514 correspond to insertion recess 515 according to the present invention. The pair of protruding pieces 513 prevent a part of second holder 8 inserted into insertion recess 515 from coming off in the opening direction of insertion recess 515 (to the right in FIG. 5). Therefore, insertion recess 515 and the pair of protruding pieces 513 correspond to dovetail 516 according to the present invention. The dovetail 516 corresponds to the attachment portion according to the present invention.

[0040] The first groove 52 has a pair of fins 521 that protrude downward from the second side wall 512 that is located on the lower side when the connecting material 5 is used, out of the pair of second side wall parts 512. The first groove 52 is a substantially U-shaped groove formed by the second side wall part 512 and the pair of fins 521, into which the upper end of the second form panel 3 located on the lower side of two second form panels 3 lined up vertically is inserted.

[0041] The second groove 53 has a pair of fins 531 each protruding upward from the second side wall 512 that is located on the upper side when the connecting material 5 is used, of the pair of second side wall portions 512. The second groove 53 is a substantially U-shaped groove defined by the second side wall portion 512 and the pair of fins 531, into which the lower end of the second form panel 3 located on the upper side of two second form panels 3 arranged vertically is inserted.

[0042] Fin portion 54 is a portion that protrudes from first side wall portion 511 to the side opposite to the pair of second side wall portions 512. Fin portion 54 is provided with recessed portion 541 that is recessed downward and into which engaging protrusion 624 is inserted. In other words, recessed portion 541 is a portion that engages with engaging protrusion 624. Fin portion 54, recessed portion 541, and engaging protrusion 624 correspond to engaging structure 100 according to the present invention.

[0043] [Construction method] Next, a method for constructing a foundation using the above-mentioned formwork set 1 will be described. 6 to 9 are diagrams showing a construction method. First, a worker places the first form panel 2 on the first panel holding portion 210 of the form holder 200 which has been attached in advance on the sacrificial concrete (first form panel placing step (FIG. 6)).

[0044] Next, the worker inserts the rod-shaped member 61 (rod-shaped portion 612) of the separator 6 into the through hole H1 of the first form panel 2 from the casting space SP side, and connects the first holder 7 to one end of the rod-shaped portion 612 (FIG. 6). The worker also installs the reinforcing bar 300 in the casting space SP, avoiding the separator 6 (FIG. 6).

[0045] Next, the worker installs the second form panel 3 on the lower frame rail 230 attached to the second panel holding portion 220 of the form holder 200 (second lower form panel installation process (Figure 7)). Hereinafter, the second form panel 3 will be referred to as the second lower form panel 3D.

[0046] Next, the worker installs the connecting material 5 by inserting the first groove portion 52 into the upper end of the second lower formwork panel 3D with the fin portion 54 positioned within the pouring space SP (connecting material installation process (FIG. 7)). The worker also places the flat portion 623 on the fin portion 54 and inserts the engagement protrusion 624 into the recess 541 to temporarily fix the separator 6 to the connecting material 5 (separator installation process (FIG. 7)). The worker then fixes the flat portion 623 and the fin portion 54 together with a fastener SC1 such as a screw. As a result, the separator 6 is fixed to the connecting material 5. The worker also fixes the pair of fin portions 521 to the upper end side of the second lower formwork panel 3D with a fastener SC2 such as a screw. By fixing the separator 6 in the above manner, the second lower form panel 3D faces the first form panel 2 while being spaced apart from the first form panel 2 by a specific width.

[0047] Next, the worker inserts the lower end of the second form panel 3 into the second groove portion 53 to connect the second form panel 3 to the upper side of the second lower form panel 3D (second upper form panel installation process (Figure 8)). Hereinafter, the second form panel 3 will be referred to as the second upper form panel 3U. The worker also connects the upper end of the first form panel 2 and the upper end of the second upper form panel 3U using an upper end retainer 400 (Figure 8).

[0048] Next, the worker connects the second retainer 8 (nut 841) to the connecting material 5 by inserting it into the dovetail groove 516 from outside the casting space SP. The worker also attaches the thick end material 9 between the first form panel 2 and the retainer 72, and attaches the thick end material 9 between the second lower form panel 3D and the second upper form panel 3U and the retainer 82 (FIG. 9).

[0049] After the above steps, concrete is poured into the pouring space SP.

[0050] After the concrete has hardened, the workers will carry out the following removal work. That is, the worker sequentially removes the end thick material 9, removes the first retainer 7 from the separator 6 (rod-shaped portion 612), removes the first formwork panel 2, removes the connecting portion 613 (including the rod-shaped portion 612) from the rod-shaped portion 611, and removes the second retainer 8 from the connecting material 5.

[0051] (Other embodiments) Although the embodiments for carrying out the present invention have been described above, the present invention should not be limited to the above-described embodiments. In the above-described embodiment, the engagement structure of the present invention is not limited to the engagement structure 100 described in the above-described embodiment, and other engagement structures may be adopted as long as they can temporarily fix the separator 6 and the connecting portion 5.

[0052] In the above-described embodiment, a panel having a continuous corrugated cross section is used as the second form panel 3, but this is not limiting, and a flat panel similar to the first form panel 2 may be used. In other words, both the first and second form panels 2 and 3 may be made of flat panels.

[0053] In the above-described embodiment, the following modification 1 may be adopted. Fig. 10 to Fig. 15 are diagrams for explaining a first modified example of the embodiment. Specifically, Fig. 10 is a diagram corresponding to Fig. 1. Figs. 11 and 12 are enlarged views of a part of Fig. 10. Figs. 13 to 15 are diagrams showing a construction method of the first modified example. In the above-described embodiment, the configuration of Modification 1 shown in Figures 10 to 12 may be adopted. For ease of explanation, the form set 1 according to Modification 1 will be referred to as form set 1A below.

[0054] The formwork set 1A according to this modified example 1 is used, for example, for the construction of the foundation of the central passage section. In this formwork set 1A, the first formwork panel 2 described in the above-mentioned embodiment has the same configuration as the second formwork panel 3 described in the above-mentioned embodiment, and is composed of panels with a continuous corrugated cross section. In addition, in this modified example 1, two first formwork panels 2 are arranged vertically to correspond to a foundation height of about 1500 mm. In the following, for convenience of explanation, the first formwork panel 2 arranged on the lower side will be described as the first lower formwork panel 2D, and the first formwork panel 2 arranged on the upper side will be described as the first upper formwork panel 2U. Furthermore, in the formwork set 1A, the first lower formwork panel 2D and the first upper formwork panel 2U are connected using a connecting member 5 having a configuration similar to that of the connecting member 5 connecting the second lower formwork panel 3D and the second upper formwork panel 3U. For the sake of convenience, the connecting member 5 connecting the first lower form panel 2D and the first upper form panel 2U will be referred to as the first connecting member 5A, and the connecting member 5 connecting the second lower form panel 3D and the second upper form panel 3U will be referred to as the second connecting member 5B. In addition, in the form set 1A, the first holder 7 has the same configuration as the second holder 8. For the sake of convenience, the first holder 7 according to this modified example 1 will be referred to as the first holder 8A, and the second holder 8 according to this modified example 1 will be referred to as the second holder 8B. Furthermore, in the form set 1A, the configuration of the separator 6 is changed. For the sake of convenience, the separator 6 according to this modified example 1 will be referred to as the separator 6A.

[0055] In the separator 6A, the connecting portion 613 and the rod-shaped portion 612 are omitted from the separator 6 described in the above embodiment, and an engaging member 62 having the same configuration as the engaging member 62 is further added. For convenience of explanation, the engaging member 62 connected to one end of the rod-shaped portion 611 is described as a first engaging member 62A, and the engaging member 62 connected to the other end of the rod-shaped portion 611 is described as a second engaging member 62B. The fin portion 54 and the recessed portion 541 of the first connecting member 5A and the engaging protrusion 624 of the first engaging member 62A correspond to the first engaging structure 100A according to the present invention. The fin portion 54 and the recessed portion 541 of the second connecting member 5B and the engaging protrusion 624 of the second engaging member 62B correspond to the second engaging structure 100B according to the present invention.

[0056] The method of constructing a foundation using the above-mentioned formwork set 1A is as follows. First, a worker places the first lower form panel 2D on the lower frame rail 250 attached to the first panel holding portion 240 of the form holder 200A which has been previously installed on the basal concrete (first lower form panel installation process (Figure 13)).

[0057] Next, the worker installs the first connecting material 5A by inserting the first groove portion 52 into the upper end of the first lower formwork panel 2D with the fin portion 54 positioned within the pouring space SP (first connecting material installation process (Figure 13)).

[0058] Next, the worker places the second lower form panel 3D on the lower form rail 270 attached to the second panel holding portion 260 of the form holder 200A (second lower form panel placing step (FIG. 13)).

[0059] Next, the worker installs the second connecting material 5B by inserting the first groove portion 52 into the upper end of the second lower formwork panel 3D with the fin portion 54 positioned within the pouring space SP (second connecting material installation process (Figure 13)).

[0060] Next, the worker places the flat surface portion 623 of the first engaging member 62A on the fin portion 54 of the first connecting material 5A and inserts the engaging projection 624 of the first engaging member 62A into the recess 541 of the first connecting material 5A to temporarily fix the separator 6A to the first connecting material 5A. The worker also places the flat surface portion 623 of the second engaging member 62B on the fin portion 54 of the second connecting material 5B and inserts the engaging projection 624 of the second engaging member 62B into the recess 541 of the second connecting material 5B to temporarily fix the separator 6A to the second connecting material 5B (separator installation process (FIG. 13)). Furthermore, the worker installs the reinforcing bar 300 in the casting space SP while avoiding the separator 6A. The worker also fixes the flat portion 623 of the first engaging member 62A and the fin portion 54 of the first connecting member 5A with a fastener SC3 such as a screw. The worker also fixes the flat portion 623 of the second engaging member 62B and the fin portion 54 of the second connecting member 5B with a fastener SC4 such as a screw. This fixes the separator 6A to the first and second connecting members 5A and 5B. The worker also fixes the pair of fin portions 521 of the first connecting member 5A and the upper end side of the first lower form panel 2D with a fastener SC5 such as a screw. The worker also fixes the pair of fin portions 521 of the second connecting member 5B and the upper end side of the second lower form panel 3D with a fastener SC6 such as a screw. By fixing the separator 6A in this manner, the first lower form panel 2D and the second lower form panel 3D face each other with a specific width therebetween.

[0061] Next, the worker inserts the lower end of the first upper formwork panel 2U into the second groove portion 53 of the first connecting material 5A to connect the first upper formwork panel 2U to the upper side of the first lower formwork panel 2D (first upper formwork panel installation process (Figure 14)).

[0062] Next, the worker inserts the lower end of the second upper form panel 3U into the second groove 53 of the second connecting material 5B to connect the second upper form panel 3U to the upper side of the second lower form panel 3D (second upper form panel installation step (FIG. 14)). The worker also connects the upper end of the first upper form panel 2U and the upper end of the second upper form panel 3U with the upper end retainer 400A (FIG. 14).

[0063] Next, the worker inserts the first retainer 8A (nut 841) into the dovetail groove 516 of the first connecting member 5A from the outside of the casting space SP to connect it to the first connecting member 5A (FIG. 15). The worker also inserts the second retainer 8B (nut 841) into the dovetail groove 516 of the second connecting member 5B from the outside of the casting space SP to connect it to the second connecting member 5B (FIG. 15). Furthermore, the worker attaches the thick end material 9 between the first lower form panel 2D and the first upper form panel 2U and the clamp 82 of the first retainer 8A, and attaches the thick end material 9 between the second lower form panel 3D and the second upper form panel 3U and the clamp 82 of the second retainer 8B (FIG. 15).

[0064] After the above steps, concrete is poured into the pouring space SP.

[0065] After the concrete has hardened, the workers will carry out the following removal work. That is, the worker sequentially removes the thick end material 9 and the first and second holders 8A and 8B from the first and second connecting materials 5A and 5B.

[0066] The formwork set of the present invention is a formwork set that forms a pouring space into which concrete is poured, and comprises a first formwork panel that forms one side of the pouring space, two second formwork panels that each form the opposing other side of the pouring space, a connecting member that connects the two second formwork panels in a vertically arranged state, and a separator that crosses the pouring space and sets the width between the first formwork panel and the two second formwork panels to a specific width, and is characterized in that the separator and the connecting member are provided with an engagement structure for temporarily fixing the separator and the connecting member.

[0067] In the present invention, two second form panels are provided. The two second form panels are connected in a vertically arranged state by a connecting material. The separator and the connecting material are provided with an engagement structure for temporarily fixing the separator and the connecting material. Therefore, for example, when constructing a high foundation, the separator can be temporarily fixed to the connecting material installed on the second lower form panel in a state where only the second lower form panel that forms the lower side of the other space of the pouring space out of the two second form panels is installed. In other words, with the two second form panels connected by the connecting material, it is not necessary to insert one's hands into the pouring space from above the two second form panels to attach the separator, which improves workability.

[0068] In addition, in the present invention, in the above-mentioned formwork set, the engagement structure is characterized in that it comprises a fin portion provided on the connecting material, protruding toward the pouring space and on which a part of the separator is placed, a recess provided on one of the separator and the fin portion and recessed in the vertical direction, and an engagement protrusion provided on the other of the separator and the fin portion and inserted into the recess. In the present invention, the engagement structure includes the fin portion, the recess, and the engagement protrusion as described above. Therefore, by simply placing a part of the separator on the fin portion and inserting the engagement protrusion into the recess, the separator can be easily temporarily fixed to the connecting material, thereby further improving workability.

[0069] In addition, in the present invention, in the above-mentioned formwork set, the second formwork panel has a plurality of rectangular board pieces assembled with their long sides adjacent to each other, and the long sides of adjacent board pieces are connected in a rotatable manner. In the present invention, since the second form panel is configured as described above, the second form panel can be stored and transported by being wound up in a roll. In addition, the second form panel can be installed while being unwound from the rolled state, which further improves workability.

[0070] However, if the second form panel is configured in the above-mentioned rolled state to correspond to a relatively high foundation height, the weight of the second form panel will be large and it will be difficult to transport. In addition, since the height will be high, it will be difficult to install the second form panel while unrolling it from the rolled state, which will result in poor workability. In the present invention, since two second form panels in a rolled state are used, the weight of each second form panel in a rolled state is light, making it easy to transport. Also, since the height of each second form panel is low, the work of installing the second form panel while unrolling it from the rolled state is easy, improving workability.

[0071] In addition, the present invention is characterized in that in the above-mentioned formwork set, the connecting material is provided with a first groove portion into which an upper end of one of the two second formwork panels is inserted, and a second groove portion into which a lower end of the other of the two second formwork panels is inserted. In the present invention, the connecting material is provided with the first and second grooves described above, which can be used as rails for the second form panel in a rolled state, making the rails unnecessary and allowing the second form panel to be easily installed.

[0072] In addition, the present invention is characterized in that the above-mentioned formwork set further includes a retainer that maintains the strength of the two second formwork panels together with the end thick material from the outside of the pouring space, and the connecting material is provided with an attachment portion to which the retainer is attached. In the present invention, the connecting material is provided with the above-mentioned mounting portion, which eliminates the need for a separate member to which the retainer is attached, and the strength of the two second form panels can be satisfactorily maintained by using the retainer and the thick end material.

[0073] In addition, in the present invention, in the above-mentioned formwork set, the mounting portion is a dovetail extending horizontally, and the dovetail has an insertion recess through which a portion of the retainer is inserted, and a pair of protruding pieces which protrude in directions approaching each other from the side surfaces of the insertion recess and prevent the retainer from slipping out in the opening direction of the insertion recess. In the present invention, the mounting portion is the dovetail groove described above, so that the number of holders to be used can be freely selected.

[0074] In addition, the present invention is characterized in that, in the above-mentioned formwork set, two first formwork panels are provided, and the connecting members include a first connecting member that connects the two first formwork panels in a vertically arranged state, and a second connecting member that connects the two second formwork panels in a vertically arranged state, and the engagement structure includes a first engagement structure provided between the separator and the first connecting member for temporarily fixing the separator and the first connecting member, and a second engagement structure provided between the separator and the second connecting member for temporarily fixing the separator and the second connecting member. In the present invention, two first form panels are provided. The connecting members include the first and second connecting members described above. And the engagement structure includes the first and second engagement structures described above. Therefore, for example, when constructing a foundation for a central passage section, the form set according to the present invention can be used to improve workability.

[0075] The construction method of the present invention comprises a first form panel installation step of installing a first form panel that forms one side of the pouring space into which concrete is poured; a second lower form panel installation step of installing a second lower form panel that forms the underside of the other side of the pouring space; a connecting material installation step of installing a connecting material to the second lower form panel; a second upper form panel installation step of connecting a second upper form panel that forms the upper side of the other side of the pouring space to the upper side of the second lower form panel with the connecting material; and a separator installation step of engaging a separator that crosses the pouring space and sets the width between the first form panel and the second lower form panel and the second upper form panel to a specific width with the connecting material and temporarily fixing it to the connecting material, and is characterized in that the second upper form panel installation step is performed after the separator installation step. The construction method according to the present invention is a construction method using the above-mentioned form set, and therefore has the same functions and effects as the above-mentioned form set.

[0076] The construction method according to the present invention includes a first lower form panel installation step of installing a first lower form panel that forms the underside of one side of a pouring space into which concrete is poured, a first connecting member installation step of installing a first connecting member to the first lower form panel, a first upper form panel installation step of connecting a first upper form panel that forms the upper side of one side of the pouring space to the upper side of the first lower form panel with the first connecting member, a second lower form panel installation step of installing a second lower form panel that forms the underside of the other side of the pouring space, a second connecting member installation step of installing a second connecting member to the second lower form panel, and a second connecting member installation step of connecting a second upper form panel that forms the upper side of the other side of the pouring space. and a separator installation step of engaging a separator that crosses the casting space and sets a width between the first lower form panel and the first upper form panel and the second lower form panel and the second upper form panel to a specific width with the first connecting member and the second connecting member, respectively, thereby temporarily fixing the separator to the first connecting member and the second connecting member, respectively, and at least one of the first upper form panel installation step and the second upper form panel installation step is performed after the separator installation step. The construction method according to the present invention is a construction method using the above-mentioned form set, and therefore has the same functions and effects as the above-mentioned form set. [Explanation of symbols]

[0077] 1,1A formwork set, 2 first formwork panel, 2D first lower formwork panel, 2U first upper formwork panel, 3 second formwork panel, 3D second lower formwork panel, 3U second upper formwork panel, 5 connecting member, 5A first connecting member, 5B second connecting member, 6,6A separator, 8,8B second retainer, 9 end thick member, 31 plate piece, 52 first groove portion, 53 second groove portion, 54 fin portion, 100 engagement structure, 100A first engagement structure, 100B second engagement structure, 311 long side, 513 protruding piece, 515 insertion recess, 516 dovetail groove, 541 recess, 624 engagement protrusion, SP casting space

Claims

1. A formwork set for forming a pouring space in which concrete is poured, A first form panel forming one side of the casting space; Two second formwork panels each forming the other opposing side of the casting space; A connecting member that connects the two second form panels in a vertically aligned state; A separator that crosses the casting space and sets a width between the first form panel and the two second form panels to a specific width; The separator and the connecting material include An engagement structure is provided for temporarily fixing the separator and the connecting material. A formwork set characterized by:

2. The engagement structure includes: A fin portion provided on the connecting material, protruding toward the casting space and on which a part of the separator is placed; a recess provided in one of the separator and the fin portion and recessed in a vertical direction; an engagement protrusion provided on the other of the separator and the fin portion and inserted into the recess; 2. A formwork set according to claim 1.

3. The second formwork panel comprises: The plate has a plurality of rectangular pieces arranged so that their long sides are adjacent to each other, The plate piece is The long sides of adjacent ones are rotatably connected to each other.

2. A formwork set according to claim 1.

4. The connecting material includes: a first groove into which an upper end of one of the two second formwork panels is inserted; and a second groove portion into which the other lower end of the two second form panels is inserted. A formwork set according to claim 3.

5. Further provided is a holder for holding the strength of the two second form panels together with the end thickening material from the outside of the casting space; The connecting material includes: A mounting portion is provided to which the holder is attached.

2. A formwork set according to claim 1.

6. The mounting portion is A dovetail groove extending along a horizontal direction, The dovetail groove is a pair of protruding pieces that protrude in mutually approaching directions from side surfaces of the insertion recess and prevent the holder from coming off in a direction toward the opening of the insertion recess; A formwork set according to claim 5.

7. The first formwork panel comprises: Two are provided, The connecting material is A first connecting member that connects the two first form panels in a vertically aligned state; and a second connecting member for connecting the two second form panels in a vertically aligned state; The engagement structure includes: a first engagement structure provided on the separator and the first connecting material for temporarily fixing the separator and the first connecting material; a second engagement structure provided on the separator and the second connecting member for temporarily fixing the separator and the second connecting member; 2. A formwork set according to claim 1.

8. A first form panel installation process of installing a first form panel that forms one side of a pouring space into which concrete is poured; A second lower form panel installation process for installing a second lower form panel that forms the lower side of the other side of the casting space; a connector installation step of installing a connector to the second lower form panel; A second upper form panel installation process in which a second upper form panel forming an upper side of the other side of the casting space is connected to the upper side of the second lower form panel by the connecting material; A separator installation process is provided in which a separator that crosses the casting space and sets a width between the first form panel and the second lower form panel and the second upper form panel to a specific width is engaged with the connecting material and temporarily fixed to the connecting material, The second upper formwork panel installation step includes: This is carried out after the separator installation step. A construction method characterized by the above.

9. A first lower form panel installation process of installing a first lower form panel that forms a lower side of one side of a pouring space into which concrete is poured; a first connector installation step of installing a first connector to the first lower form panel; A first upper form panel installation process in which a first upper form panel forming an upper side of one side of the casting space is connected to the upper side of the first lower form panel by the first connecting member; A second lower form panel installation process for installing a second lower form panel that forms the lower side of the other side of the casting space; a second connector installation step of installing a second connector to the second lower form panel; A second upper form panel installation process in which a second upper form panel forming an upper side of the other side of the casting space is connected to the upper side of the second lower form panel by the second connecting member; and a separator installation process for temporarily fixing a separator, which crosses the casting space and sets a width between the first lower form panel and the first upper form panel and the second lower form panel and the second upper form panel to a specific width, to the first connecting member and the second connecting member, respectively, by engaging the separator with the first connecting member and the second connecting member, respectively; At least one of the first upper form panel installation step and the second upper form panel installation step is This is carried out after the separator installation step. A construction method characterized by the above.

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