Foundation formwork and foundation formation method

Abstract

A foundation form and a method for forming a foundation are provided that allow for selectable insert positions relative to the foundation. [Solution] A foundation formwork (10) includes a first formwork body (11) having a plurality of through holes (11c), a bolt (13) as a temporary fixing member for temporarily fixing an insert (132) disposed on the inner surface (11a) of the first formwork body (11) to the first formwork body (11) so that its connecting hole (132a) communicates with the through hole (11c), and a closing member (14) that is detachable from the first formwork body (11). The bolt (13) has a shaft (13a) as an insertion portion that is inserted into the through hole (11c) and connected to the connecting hole (132a), and a head (13b) as a clamping portion that is disposed on the outer surface (11b) of the first formwork body (11) and connected to the insert (132) via the shaft (13a), and that clamps the first formwork body (11) together with the insert (132). The closing member (14) closes the through holes (11c) into which the shaft (13a) is not inserted.

Description

[Technical Field]

[0001] The present disclosure relates to a foundation form and a method for forming a foundation. [Background technology]

[0002] As a technology related to building foundations, Patent Document 1 discloses an insert comprising an insert body and a temporary fastener. The temporary fastener is inserted into a through-hole provided in a formwork for pouring concrete and is engaged with the insert body, thereby temporarily fixing the insert body to the inner surface of the formwork. Concrete is poured with the insert body temporarily fixed to the inner surface of the formwork, thereby forming concrete with the insert body embedded. After the concrete hardens, the formwork and the temporary fastener are removed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3182737 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the position of the through hole relative to the formwork is fixed, and therefore the position at which the insert body is embedded in the concrete is fixed. [Means for solving the problem]

[0005] (1) A foundation formwork that solves the above-mentioned problem is a foundation formwork used to form a foundation, comprising: a rising portion made of concrete; an insert embedded inside the rising portion and having a connecting hole that opens on a side of the rising portion; and a reinforcing bar connected to the connecting hole; the foundation formwork comprises a formwork body having a plurality of through holes; a temporary fixing member for temporarily fixing the insert to the formwork body, the temporary fixing member being arranged on the inner surface of the formwork body so that the connecting hole communicates with the through hole; and a closing member that is detachable from the formwork body, the temporary fixing member having an insertion portion that is inserted into the through hole and connected to the connecting hole, and a clamping portion that is arranged on the outer surface of the formwork body and connected to the insert via the insertion portion, and clamps the formwork body together with the insert, and the closing member is capable of closing the through hole.

[0006] With this configuration, since the form body has multiple through holes, the worker can select the through holes to communicate with the connecting holes of the inserts. This allows the worker to select the position of the inserts relative to the foundation. Furthermore, since the through holes that do not have an inserting part inserted can be blocked with the blocking member, concrete can be prevented from flowing out of the holes that do not have an inserting part inserted.

[0007] (2) In the foundation formwork of (1) above, the temporary fixing member is constituted by a bolt, the insertion portion is constituted by the shank of the bolt, and the clamping portion is constituted by the head of the bolt.

[0008] With this configuration, the insert can be temporarily fixed to the formwork body with a bolt. Furthermore, compared to when the insertion portion is configured with a cut bolt and the clamping portion is configured with a nut, the amount of protrusion of the temporary fixing member from the outer surface of the formwork body can be reduced. Therefore, the temporary fixing member is less likely to get in the way when pouring concrete. Furthermore, because the insertion portion and clamping portion are integrated, the temporary fixing member can be easily managed.

[0009] (3) In the foundation formwork of (1) above, the insertion portion is constituted by a cut bolt, and the clamping portion is constituted by a nut. According to this configuration, the insert can be temporarily fixed to the form body by the cut bolt and nut.

[0010] (4) In the foundation formwork of (3) above, the cut bolts are used as the insert bars. With this configuration, the cut bolt serves both as the insertion portion of the temporary fixing member and as the insert reinforcing bar, eliminating the need to remove the insertion portion from the insert and to connect the insert reinforcing bar to the insert from which the insertion portion has been removed.

[0011] (5) In the foundation formwork of any one of (1) to (4) above, a plurality of the through holes are provided in the width direction of the formwork body. This configuration increases the options for the position of the insert in the width direction of the formwork body.

[0012] (6) In the foundation formwork of any one of (1) to (5) above, the through holes are provided in a plurality in the vertical direction. This configuration increases the options for the position of the insert in the vertical direction.

[0013] (7) In the foundation formwork of any one of (1) to (6) above, the closing member has an insertion portion that is inserted into the through hole. This configuration can prevent concrete from flowing into the through hole.

[0014] (8) In the foundation formwork of (7) above, the formwork body is made of metal, and the closing member has a magnet. According to this configuration, the closing member is attached to the formwork body by being attached to the formwork body by the magnetic force of the magnet, so that the closing member can be easily attached to and detached from the formwork body.

[0015] (9) In the foundation formwork of (8) above, the blocking member has a metal magnet case that is arranged on the outer surface of the formwork body and has a base portion that houses the magnet, and a protrusion portion that protrudes from the base portion as the insertion portion. According to this configuration, the magnet can be protected by the magnet case.

[0016] (10) In the foundation formwork of (8) above, the magnet is arranged so as to contact the outer surface of the formwork body, and the insertion portion is fixed to the magnet. According to this configuration, the configuration of the blocking member can be simplified.

[0017] (11) A method of forming the foundation using the foundation formwork of (1) above includes an installation step including the steps of installing the formwork body, selecting a through hole to be connected to the connecting hole of the insert from a plurality of through holes provided in the formwork body, and temporarily fixing the insert to the formwork body with the temporary fixing member while arranging the insert on the inner surface of the formwork body so that the selected through hole and the connecting hole are connected, and blocking the through holes into which the insertion portion is not inserted with the blocking member; a pouring step of pouring concrete after the installation step; a removal step of removing the formwork body, the temporary fixing member, and the blocking member after the pouring step; and a connecting step of connecting the reinforcing bars to the connecting holes of the insert after the removal step.

[0018] Since the formwork body has multiple through-holes, the worker can select which through-holes to connect with the connecting holes of the inserts during the installation process. This allows the worker to select the position of the inserts relative to the foundation. Furthermore, during the installation process, through-holes that are not passed through by the insertion part are blocked by blocking members, which prevents concrete from flowing out of through-holes that are not passed through by the insertion part during the pouring process.

[0019] (12) A method of forming the foundation using the foundation formwork of (4) above includes an installation process including the steps of installing the formwork body, selecting a through hole from the plurality of through holes provided in the formwork body that will communicate with the connecting hole of the insert, placing the insert on the inner surface of the formwork body so that the selected through hole communicates with the connecting hole, and temporarily fixing the insert to the formwork body with the temporary fixing member, and blocking the through holes into which the insertion portion is not inserted with the blocking member; a pouring process of pouring concrete after the installation process; and a removal process of removing the formwork body, the clamping portion, and the blocking member after the pouring process.

[0020] Because the formwork body has multiple through holes, workers can select which through holes to connect with the connecting holes of the inserts during the installation process. This allows them to select the position of the inserts relative to the foundation. Furthermore, because through holes that do not have an inserting portion inserted during the installation process are blocked with a blocking member, concrete is prevented from flowing out of through holes that do not have an inserting portion inserted during the pouring process. Furthermore, because the cut bolts serve as both the inserting portion and the inserting bar of the temporary fixing member, the work of removing the inserting portion and the connecting process are unnecessary during the removal process. [Effects of the Invention]

[0021] The foundation form and foundation forming method of the present disclosure allows for the selection of the location of the insert relative to the foundation. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. [Figure 2] FIG. 2 is a cross-sectional view of the foundation taken along line 2-2 in FIG. [Figure 3] A cross-sectional view of the foundation formwork. [Figure 4] This is a view of the foundation formwork viewed from the outer surface side of the first formwork body. [Figure 5] FIG. 10 is a cross-sectional view showing the casting process. [Figure 6]FIG. 10 is a cross-sectional view showing the rising portion after the removal step. [Figure 7] FIG. 10 is a cross-sectional view showing a temporary fixing member in a modified example. [Figure 8] FIG. 10 is a cross-sectional view showing a rising portion in a modified example. [Figure 9] FIG. 10 is a front view showing a blocking member in a modified example. [Figure 10] FIG. 10 is a cross-sectional view showing a blocking member in a modified example. [Figure 11] FIG. 10 is a front view showing a blocking member in a modified example. [Figure 12] FIG. 10 is a cross-sectional view showing a blocking member in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0023] A method for forming the foundation formwork 10 and the foundation 100 of this embodiment will be described with reference to FIGS. <Basic 100> 1 and 2, the foundation 100 includes a continuous footing 110 and an earthen floor portion 120. The continuous footing 110 and the earthen floor portion 120 are made of concrete.

[0024] The continuous footing 110 has a footing 111 and a rising portion 112 extending upward from the footing 111. The continuous footing 110 is buried underground UG except for the upper part of the rising portion 112. The earthen floor portion 120 is located above ground. The earthen floor portion 120 extends horizontally. The earthen floor portion 120 is provided in an area surrounded by the rising portion 112. The earthen floor portion 120 is connected to the side surface 112a of the rising portion 112.

[0025] The foundation 100 includes a reinforcement bar 131 for integrating the continuous footing 110 and the earthen floor portion 120 together, and an insert 132 for connecting the reinforcement bar 131 to the continuous footing 110. The insert 132 of this embodiment is configured as a long nut. The insert 132 is embedded inside the rising portion 112. A connecting hole 132a is provided in the insert 132. In this embodiment, the connecting hole 132a is the space inside the long nut. Therefore, a female thread is provided on the inner circumferential surface of the connecting hole 132a. The connecting hole 132a opens at the side surface 112a of the rising portion 112.

[0026] The insert bars 131 of this embodiment are made of cut bolts. Male threads are provided on the outer peripheral surface of the insert bars 131. The male threads of the insert bars 131 are engaged with the female threads of the connecting holes 132a, thereby connecting the insert bars 131 to the connecting holes 132a of the insert 132. The insert bars 131 extend horizontally from the side surfaces 112a of the rising portion 112 by being connected to the insert 132. The portions of the insert bars 131 extending from the side surfaces 112a of the rising portion 112 are embedded inside the earthen floor portion 120. A plurality of insert bars 131 are provided in the horizontal direction, perpendicular to the direction in which the insert bars 131 extend.

[0027] <Foundation Formwork 10> As shown in FIG. 3, the foundation formwork 10 includes a plurality of formwork bodies 10a. Two formwork bodies 10a are shown in FIG. 3. The formwork bodies 10a are plate-shaped. In this embodiment, the formwork bodies 10a are made of steel. The formwork bodies 10a are arranged at intervals in the thickness direction of the formwork bodies 10a. Concrete is poured between the formwork bodies 10a. As the poured concrete hardens, rising portions 112 are formed (see FIG. 5).

[0028] Although not shown, the form bodies 10a are connected in the width direction of the form bodies 10a according to the shape of the rising portions 112 to be formed. For example, in a portion where the rising portions 112 extend linearly in a plan view, the form bodies 10a are connected linearly in a plan view. For example, in a portion where the rising portions 112 intersect in a plan view, the form bodies 10a are connected so as to intersect in a plan view.

[0029] The formwork body 10a is either a first formwork body 11 having a plurality of through holes 11c, or a second formwork body 12 having no through holes 11c. The first formwork body 11 is used to form a portion of the rising portion 112, on the side surface 112a, where the insert 132 is embedded. The second formwork body 12 is used to form a portion of the rising portion 112, on the side surface 112a, where the insert 132 is not embedded. Of the two formwork bodies 10a shown in Figure 3, one is the first formwork body 11 and the other is the second formwork body 12.

[0030] <First formwork body 11> The first form body 11 has an inner surface 11a and an outer surface 11b. The inner surface 11a and the outer surface 11b are each perpendicular to the thickness direction of the first form body 11. When concrete has not been poured between the first form body 11 and the second form body 12, the inner surface 11a faces the second form body 12. When concrete is poured between the first form body 11 and the second form body 12, the inner surface 11a comes into contact with the concrete. The outer surface 11b is the surface opposite the inner surface 11a.

[0031] As shown in FIG. 4, four vertical beams 21 for reinforcing the first form body 11 are provided on the outer surface 11b of the first form body 11. The vertical beams 21 extend in the vertical direction. When distinguishing between the four vertical beams 21, they are referred to as the first vertical beam 21a, the second vertical beam 21b, the third vertical beam 21c, and the fourth vertical beam 21d. The first vertical beam 21a, the second vertical beam 21b, the third vertical beam 21c, and the fourth vertical beam 21d are arranged in this order at equal intervals in the width direction of the first form body 11. The first vertical beam 21a is located at a first end of the first form body 11 in the width direction. The fourth vertical beam 21d is located at a second end of the first form body 11 in the width direction.

[0032] Four horizontal crosspieces 22 for reinforcing the first formwork body 11 are provided on the outer surface 11b of the first formwork body 11. The horizontal crosspieces 22 extend in the width direction of the first formwork body 11. When distinguishing between the four horizontal crosspieces 22, they are referred to as the first horizontal crosspiece 22a, the second horizontal crosspiece 22b, the third horizontal crosspiece 22c, and the fourth horizontal crosspiece 22d. The first horizontal crosspiece 22a, the second horizontal crosspiece 22b, the third horizontal crosspiece 22c, and the fourth horizontal crosspiece 22d are arranged in this order at equal intervals in the vertical direction. The first horizontal crosspiece 22a is located at the upper end of the first formwork body 11. The fourth horizontal crosspiece 22d is located at the lower end of the first formwork body 11.

[0033] The four vertical beams 21 and the four horizontal beams 22 intersect. The outer surface 11b of the first formwork body 11 is divided into nine regions A by the four vertical beams 21 and the four horizontal beams 22. The nine regions A include a first middle region A1, a second middle region A2, and a third middle region A3. The first middle region A1 is a region divided by the first vertical beam 21a, the second vertical beam 21b, the second horizontal beam 22b, and the third horizontal beam 22c. The second middle region A2 is a region divided by the second vertical beam 21b, the third vertical beam 21c, the second horizontal beam 22b, and the third horizontal beam 22c. The third middle region A3 is a region divided by the third vertical beam 21c, the fourth vertical beam 21d, the second horizontal beam 22b, and the third horizontal beam 22c.

[0034] As shown in FIGS. 3 and 4 , the first formwork body 11 has a plurality of through holes 11c. The through holes 11c penetrate the first formwork body 11 in the thickness direction. A plurality of through holes 11c are provided in the width direction of the first formwork body 11. The spacing between the through holes 11c in the width direction of the first formwork body 11 is set to, for example, the same as the minimum spacing expected for providing the insert bars 131. A plurality of through holes 11c are provided in the vertical direction. The positions of the through holes 11c in the vertical direction are set based on the height of the foundation 100. In this embodiment, three through holes 11c are provided for each region A. Therefore, 27 through holes 11c are provided in the first formwork body 11 of this embodiment. The three through holes 11c provided in each region A are aligned at intervals in the width direction of the first formwork body 11. The through holes 11c in this embodiment are circular.

[0035] The insert 132 is disposed on the inner surface 11a of the first formwork body 11 so that the connecting hole 132a communicates with the through hole 11c. In Fig. 4, the insert 132 is provided so that the connecting hole 132a communicates with the middle through hole 11c of the three through holes 11c aligned in the width direction of the first formwork body 11 in the first middle region A1, the second middle region A2, and the third middle region A3.

[0036] <Bolt 13 (temporary fixing member)> The foundation formwork 10 is equipped with a temporary fixing member for temporarily fixing an insert 132, which is arranged on the inner surface 11a of the first formwork body 11 so that the connecting hole 132a communicates with the through hole 11c, to the first formwork body 11. The temporary fixing member in this embodiment is constituted by a bolt 13. The bolt 13 has a shaft portion 13a and a head portion 13b provided at one end of the shaft portion 13a. The shaft portion 13a constitutes an insertion portion that is inserted into the through hole 11c and connected to the connecting hole 132a. The head portion 13b is arranged on the outer surface 11b of the first formwork body 11. The head portion 13b is connected to the insert 132 via the shaft portion 13a. The head portion 13b constitutes a clamping portion that clamps the first formwork body 11 together with the insert 132.

[0037] <Blocking member 14> As shown in Figures 3 and 4, the foundation formwork 10 is equipped with a closing member 14. The closing member 14 is configured to be detachable from the first formwork body 11. The closing member 14 is configured to be able to close through holes 11c provided in the first formwork body 11. The closing member 14 closes through holes 11c, of the multiple through holes 11c provided in the first formwork body 11, through which the shank 13a is not inserted. In other words, the closing member 14 closes through holes 11c that do not communicate with the connecting hole 132a of the insert 132. In Figure 4, the closing member 14 closes 24 through holes 11c, of the 27 through holes 11c provided in the first formwork body 11, through which the shank 13a is not inserted.

[0038] The blocking member 14 of this embodiment has a magnet 41 and a metal magnet case 42. The magnet 41 is made of, for example, neodymium. The magnet case 42 has a base portion 42a and a protruding portion 42b. The base portion 42a of this embodiment is disk-shaped. The diameter of the base portion 42a is larger than the diameter of the through hole 11c. The base portion 42a is arranged on the outer surface 11b of the first formwork body 11. The magnet 41 is housed within the base portion 42a. The protruding portion 42b protrudes from one end face of the base portion 42a in the plate thickness direction. The outer diameter of the protruding portion 42b is slightly smaller than the diameter of the through hole 11c. The protruding portion 42b forms an insertion portion that is inserted into the through hole 11c. The amount of protrusion of the protruding portion 42b from the base portion 42a is approximately the same as the thickness of the first formwork body 11. Therefore, the tip end surface of the protrusion 42b is located on the same plane as the inner surface 11a of the first formwork body 11.

[0039] <How to form the 100 base> A method for forming the foundation 100 will be described. The formation of the foundation 100 is performed by a worker. The method for forming the foundation 100 includes a line footing formation step for forming the line footing 110, and a slab portion formation step for forming the earthen slab portion 120. The slab portion formation step is performed after the line footing formation step.

[0040] The continuous footing formation process includes an installation process of installing the foundation formwork 10, a pouring process of pouring concrete, a removal process of removing the foundation formwork 10, and a connecting process of connecting the reinforcement bars 131. The continuous footing formation process is performed in the order of the installation process, pouring process, removal process, and connecting process.

[0041] 3, in the installation process, workers install multiple formwork bodies 10a. The workers install the first formwork body 11 and the second formwork body 12 so that the inner surface 11a of the first formwork body 11 faces the second formwork body 12.

[0042] In the installation process, the worker selects a through hole 11c from the multiple through holes 11c provided in the first form body 11 that is to communicate with the connecting hole 132a of the insert 132. The worker places the insert 132 on the inner surface 11a of the first form body 11 so that the selected through hole 11c communicates with the connecting hole 132a. With the insert 132 placed on the inner surface 11a of the first form body 11 so that the selected through hole 11c communicates with the connecting hole 132a, the worker temporarily fixes the insert 132 to the first form body 11 with the bolt 13. In this embodiment, the worker inserts the shank 13a of the bolt 13 into the through hole 11c that communicates with the connecting hole 132a, and then connects the shank 13a to the connecting hole 132a. As a result, the first form body 11 is sandwiched between the insert 132 and the head 13b of the bolt 13, and the insert 132 is temporarily fixed to the first form body 11.

[0043] In the installation process, the worker closes, with the closing member 14, the through holes 11c through which the shaft 13a is not inserted, out of the multiple through holes 11c provided in the first formwork body 11. More specifically, the worker inserts the protruding portion 42b of the closing member 14 into the through hole 11c and places the base portion 42a on the outer surface 11b of the first formwork body 11. The magnetic force of the magnet 41 causes the closing member 14 to stick to the outer surface 11b of the first formwork body 11, thereby attaching it to the first formwork body 11.

[0044] In the installation process, the order in which the work of installing the formwork body 10a, the work of temporarily fixing the insert 132 to the first formwork body 11 with the bolt 13, and the work of blocking the through hole 11c with the blocking member 14 are performed may be changed as appropriate.

[0045] As shown in FIG. 5, in the pouring step, workers pour concrete between the first form body 11 and the second form body 12. In the installation process, the shank 13a of the bolt 13 is inserted into the through hole 11c that communicates with the connecting hole 132a of the insert 132. Therefore, in the casting process, concrete is prevented from flowing out from the through hole 11c that communicates with the connecting hole 132a. Furthermore, the shank 13a of the bolt 13 is inserted into the connecting hole 132a. Therefore, the connecting hole 132a is not filled with concrete. Furthermore, the through hole 11c into which the shank 13a of the bolt 13 is not inserted is blocked by the blocking member 14. Therefore, concrete is prevented from flowing out from the through hole 11c into which the shank 13a is not inserted.

[0046] In the casting process, the concrete poured between the first form body 11 and the second form body 12 hardens to form the rising portion 112. The insert 132 is fixed to the rising portion 112 while being embedded in the rising portion 112.

[0047] In the removal process, the worker removes the bolts 13 from the inserts 132. The worker then removes the multiple formwork bodies 10a. Since the first formwork body 11 is removed with the closing members 14 still attached, the closing members 14 are also removed.

[0048] As a result, the connecting hole 132a of the insert 132 opens at the side surface 112a of the rising portion 112, as shown in FIG. In the connecting step, the worker inserts and connects the insert bars 131 into the connecting holes 132a of the inserts 132. As a result, the insert bars 131 are connected to the rising portions 112 as shown in FIGS.

[0049] In the step of forming the earthen floor portion, workers pour concrete into the area surrounded by the rising portion 112. As the poured concrete hardens, the earthen floor portion 120 is formed. The insert bars 131 are embedded inside the earthen floor portion 120. As a result, the rising portion 112 and the earthen floor portion 120 are integrated via the insert bars 131.

[0050] [Actions and Effects of This Embodiment] The operation and effects of this embodiment will be described. (1) The foundation formwork 10 includes a first formwork body 11, a bolt 13, and a closing member 14. The first formwork body 11 has a plurality of through holes 11c. The bolt 13 is a temporary fixing member for temporarily fixing an insert 132, which is disposed on the inner surface 11a of the first formwork body 11, to the first formwork body 11 so that the connecting hole 132a communicates with the through hole 11c. The bolt 13 has a shaft 13a and a head 13b. The shaft 13a is an insertion portion that is inserted into the through hole 11c and connected to the connecting hole 132a. The head 13b is disposed on the outer surface 11b of the first formwork body 11 and connected to the insert 132 via the shaft 13a. The head 13b is a clamping portion that clamps the first formwork body 11 together with the insert 132. The closing member 14 is detachable from the first formwork body 11. The blocking member 14 is capable of blocking the through-hole 11c.

[0051] According to this configuration, since the first formwork body 11 is provided with a plurality of through holes 11c, the worker can select the through hole 11c to be connected to the connecting hole 132a of the insert 132. Therefore, the position of the insert 132 relative to the foundation 100 can be selected. Furthermore, since the through holes 11c into which the shank 13a is not inserted can be blocked by the blocking member 14, it is possible to prevent concrete from flowing out from the through holes 11c into which the shank 13a is not inserted.

[0052] (2) The temporary fixing member is constituted by a bolt 13. The insertion portion is constituted by a shaft portion 13a of the bolt 13. The clamping portion is constituted by a head portion 13b of the bolt 13.

[0053] With this configuration, the insert 132 can be temporarily fixed to the first formwork body 11 by the bolt 13. Furthermore, compared to when the insertion portion is configured with a cut bolt and the clamping portion is configured with a nut, the amount of protrusion of the temporary fixing member from the outer surface 11b of the first formwork body 11 can be reduced. Therefore, the temporary fixing member is less likely to get in the way when pouring concrete. Furthermore, since the insertion portion and clamping portion are integrated, the temporary fixing member can be easily managed.

[0054] (3) A plurality of through holes 11c are provided in the width direction of the first form body 11. This configuration increases the options for the position of the insert 132 in the width direction of the first form body 11.

[0055] (4) A plurality of through holes 11c are provided in the vertical direction. This configuration increases the options for the position of the insert 132 in the vertical direction. (5) The blocking member 14 has the protruding portion 42b as an insertion portion that is inserted into the through hole 11c. This configuration can prevent concrete from flowing into the through hole 11c.

[0056] (6) The first formwork body 11 is made of metal. The closing member 14 has a magnet 41. With this configuration, the closing member 14 is attached to the first formwork body 11 by the magnetic force of the magnet 41. This allows the closing member 14 to be easily attached to and detached from the first formwork body 11.

[0057] (7) The blocking member 14 has a metal magnet case 42. The magnet case 42 has a base portion 42a and a protruding portion 42b that protrudes from the base portion 42a. The base portion 42a is disposed on the outer surface 11b of the first formwork body 11 and houses the magnet 41. The protruding portion 42b is an insertion portion that is inserted into the through hole 11c. With this configuration, the magnet 41 can be protected by the magnet case 42.

[0058] (8) As a method for temporarily fixing the insert to the inner surface 11a of the first form body 11, for example, an insert with a built-in magnet or an insert with a magnet attached can be used. However, in this case, there is a risk that the insert may become misaligned with respect to the first form body 11 when concrete is poured in the pouring process. Also, since the insert is embedded inside the rising portion 112, costs increase by the amount of the magnet.

[0059] In contrast, in this embodiment, the insert 132 is temporarily fixed to the first form body 11 by the bolts 13. Therefore, when concrete is poured between the first form body 11 and the second form body 12, the insert 132 is prevented from shifting relative to the first form body 11. In addition, the cost of the insert 132 can be reduced.

[0060] (9) As a method for providing the insert reinforcing bars 131 on the side surface 112a of the rising portion 112, for example, it is possible to form holes in the side surface 112a of the rising portion 112 and insert the insert reinforcing bars 131 into the holes. In this case, it is necessary to form the holes in the hardened concrete using a drill or the like, which is a labor-intensive process. In addition, after the holes are formed, it is necessary to remove dust generated during the hole formation using a blower or the like. In contrast, in this embodiment, the inserts 132 are embedded when the rising portion 112 is formed, so the work of forming holes in the hardened concrete and the work of removing dust are not necessary.

[0061] (10) When the protruding portion 42b of the closing member 14 is inserted into the through hole 11c, if the tip surface of the protruding portion 42b protrudes from the inner surface 11a of the first formwork body 11, a recess is formed on the side surface 112a of the rising portion 112. If the tip surface of the protruding portion 42b is located in a position recessed from the inner surface 11a of the first formwork body 11, concrete flows into part of the through hole 11c, causing a convex portion to be formed on the side surface 112a of the rising portion 112.

[0062] In contrast, in this embodiment, the amount of protrusion of the protruding portion 42b from the base portion 42a is approximately the same as the dimension in the thickness direction of the first formwork body 11, so the tip surface of the protruding portion 42b is located on the same plane as the inner surface 11a of the first formwork body 11. Therefore, it is possible to prevent recesses or protrusions from being formed on the side surface 112a of the rising portion 112.

[0063] <Example of change> The above-described embodiment is an example of a possible form of the method for forming the foundation formwork 10 and the foundation 100, and is not intended to limit the form. The method for forming the foundation formwork 10 and the foundation 100 may take a form different from that illustrated in the above-described embodiment. Examples of such a form include a form in which part of the configuration of the embodiment is replaced, modified, or omitted, or a form in which a new configuration is added to the embodiment. Modified examples of the embodiment are shown below.

[0064] The number of through holes 11c provided in the first formwork body 11 may be changed as appropriate as long as it is plural. In the above embodiment, three through holes 11c are provided in one region A so as to be spaced apart in the width direction of the first formwork body 11, but the present invention is not limited to this.

[0065] The number and arrangement of the through holes 11c provided in each region A may be changed as appropriate. There may be regions A where through-holes 11c are provided and regions A where through-holes 11c are not provided.

[0066] The first formwork body 11 does not have to have a plurality of through holes 11c in the width direction. The through holes 11c do not have to be provided in a plurality in the vertical direction.

[0067] The shape of the through-hole 11c is not limited to a circular shape. The first formwork body 11 does not necessarily have to be provided with the vertical beams 21 and horizontal beams 22. The first formwork body 11 may be provided with either the vertical beams 21 or the horizontal beams 22, but may not be provided with the other.

[0068] The number of vertical bars 21 provided on the first formwork body 11 may be changed as appropriate. The number of horizontal beams 22 provided on the first formwork body 11 may be changed as appropriate. The insert 132 does not have to be constituted by a long nut.

[0069] The temporary fixing member does not have to be constituted by the bolt 13 . 7, the insertion portion of the temporary fixing member may be formed by a cut bolt 15, and the clamping portion of the temporary fixing member may be formed by a nut 16. In other words, the insertion portion and the clamping portion of the temporary fixing member may be separate bodies.

[0070] According to this configuration, the insert 132 can be temporarily fixed to the first form body 11 by the cut bolt 15 and the nut 16 . 8, when the insertion portion is formed by a cut bolt 15, the cut bolt 15 may be used as the insert bar 131. In this case, the length of the cut bolt 15 is set to the length required for the insert bar 131.

[0071] The method for forming the foundation 100 when the insertion portion is used as the insert reinforcing bar 131 includes an installation step, a casting step, and a removal step. The installation step and the casting step are the same as those in the above embodiment, and therefore will not be described here. In the removal step, the worker removes the nut 16 serving as the clamping portion of the temporary fixing member, but does not remove the cut bolt 15 serving as the insertion portion. The cut bolt 15 constitutes the insert reinforcing bar 131 connected to the connecting hole 132a of the insert 132. Therefore, the method for forming the foundation 100 when the insertion portion is used as the insert reinforcing bar 131 does not include the connecting step.

[0072] In this case, the cut bolt 15 serves both as an insertion portion for the temporary fixing member and as the insert bar 131. Therefore, the work of removing the cut bolt 15 from the insert 132 in the removal process and the connecting process of connecting the insert bar 131 to the insert 132 are not required.

[0073] The closing member 14 does not need to have a magnet 41 as long as it is detachable from the first formwork body 11. For example, the closing member 14 may be attached to the first formwork body 11 by a closing member bolt. For example, the closing member 14 may be configured as a resin cover cap that is fitted into the through hole 11c.

[0074] The blocking member 14 does not have to have an insertion portion. Even in this case, as long as the blocking member 14 covers the opening of the through hole 11c and thereby blocks the through hole 11c, it is possible to prevent concrete from flowing out of the through hole 11c.

[0075] The configuration of the blocking member 14 is not limited to that of the above embodiment. The blocking member 14 may have the following configuration, for example. As shown in Figures 9 and 10, the blocking member 14 has a cylindrical magnet 41 and a columnar insertion column portion 43. The magnet 41 is arranged so that one axial end face thereof contacts the outer surface 11b of the first formwork body 11. The insertion column portion 43 is made of resin or steel. A portion of the insertion column portion 43 is inserted inside the magnet 41 and fixed to the inner circumferential surface of the magnet 41. A portion of the insertion column portion 43 protrudes from one axial end face of the magnet 41. The portion of the insertion column portion 43 protruding from the magnet 41 is an insertion portion that is inserted into the through-hole 11c.

[0076] As shown in Figures 11 and 12, the closing member 14 has a disk-shaped magnet 41 and a disk-shaped insertion plate portion 44. The magnet 41 is arranged so that one axial end face thereof is in contact with the outer surface 11b of the first formwork body 11. The insertion plate portion 44 is made of resin or steel. The insertion plate portion 44 is fixed to the center of one axial end face of the magnet 41. The insertion plate portion 44 is an insertion portion that is inserted into the through-hole 11c.

[0077] These modifications also provide the effects (5) and (6) of the above embodiment. Furthermore, the configuration of the blocking member 14 can be simplified compared to the blocking member 14 of the above embodiment. Among the multiple through holes 11c provided in the first formwork body 11, the number of through holes 11c that communicate with the connecting holes 132a of the insert 132, i.e., the number of through holes 11c through which the insertion portion is inserted, may be changed as appropriate.

[0078] The formwork body 10a does not have to be made of steel. The formwork body 10a may be made of, for example, resin or wood. In this case, the closing member 14 may be attached to the first formwork body 11 by, for example, a closing member bolt, or may be attached to the first formwork body 11 by being fitted into the through-hole 11c.

[0079] When the formwork body 10a is made of resin and the closing member 14 is attached to the first formwork body 11 by fitting it into the through-hole 11c, for example, a protrusion may be provided on the surface of the closing member 14 that faces the inner circumferential surface of the through-hole 11c. This makes it difficult for the closing member 14 to come off the first formwork body 11.

[0080] When formwork body 10a is made of wood and closing member 14 is attached to first formwork body 11 by fitting it into through hole 11c, for example, the outer diameter of the portion of closing member 14 that is inserted into through hole 11c may be designed to be equal to or slightly larger than the diameter of through hole 11c. Friction generated between the inner circumferential surface of through hole 11c and closing member 14 makes it difficult for closing member 14 to come off first formwork body 11.

[0081] <Additional Notes> This specification discloses the following techniques: [Appendix 1] A foundation formwork used to form a foundation comprises a rising portion made of concrete, an insert embedded inside the rising portion and having a connecting hole that opens on a side of the rising portion, and a reinforcing bar connected to the connecting hole, the foundation formwork comprising: a formwork main body having a plurality of through holes; a temporary fixing member for temporarily fixing the insert to the formwork main body, the temporary fixing member being arranged on the inner surface of the formwork main body so that the connecting hole communicates with the through hole; and a closing member that is detachable from the formwork main body, the temporary fixing member having an insertion portion that is inserted into the through hole and connected to the connecting hole, and a clamping portion that is arranged on the outer surface of the formwork main body and connected to the insert via the insertion portion, clamping the formwork main body together with the insert, the closing member being capable of blocking the through hole.

[0082] [Appendix 2] In the foundation formwork described in Appendix 1, the temporary fixing member is constituted by a bolt, the insertion portion is constituted by the shank portion of the bolt, and the clamping portion is constituted by the head portion of the bolt.

[0083] [Appendix 3] In the foundation formwork described in Appendix 1, the insertion portion is constituted by a cut bolt, and the clamping portion is constituted by a nut.

[0084] [Appendix 4] In the foundation formwork described in Appendix 3, the cut bolts are used as the insert bars. [Appendix 5] In the foundation formwork described in Appendix 1, the through holes are provided in plurality in the width direction of the formwork body.

[0085] [Appendix 6] In the foundation formwork described in Supplementary Note 1, the through holes are provided in plurality in the vertical direction.

[0086] [Appendix 7] In the foundation formwork described in Appendix 1, the closing member has an insertion portion that is inserted into the through hole.

[0087] [Appendix 8] In the foundation formwork described in Appendix 7, the formwork body is made of metal, and the closing member has a magnet.

[0088] [Appendix 9] In the foundation formwork described in Appendix 8, the blocking member has a metal magnet case that is arranged on the outer surface of the formwork body and has a base portion that houses the magnet, and a protrusion portion that protrudes from the base portion as the insertion portion.

[0089] [Appendix 10] In the foundation formwork described in Appendix 8, the magnet is arranged so as to contact the outer surface of the formwork body, and the insertion portion is fixed to the magnet.

[0090] [Appendix 11] a step of temporarily fixing the insert to the formwork body using the temporary fixing member while the insert is positioned on the inner surface of the formwork body so that the selected through hole communicates with the connecting hole, and a step of blocking the through holes through which the insertion portion is not inserted with the blocking member; a step of pouring concrete after the setting step; a step of removing the formwork body, the temporary fixing member, and the blocking member after the setting step; and a step of connecting the insert reinforcing bars to the connecting holes of the insert after the removing step.

[0091] [Appendix 12] a step of temporarily fixing the insert to the formwork body using the temporary fixing member while the insert is positioned on the inner surface of the formwork body so that the selected through hole communicates with the connecting hole, and a step of blocking the through holes through which the insertion portion is not inserted with the blocking member; a step of pouring concrete after the step of pouring concrete; and a step of removing the formwork body, the clamping portion, and the blocking member after the step of pouring concrete. [Explanation of symbols]

[0092] 10...foundation formwork, 11...first formwork body as formwork body, 11a...inner surface, 11b...outer surface, 11c...through hole, 13...bolt as temporary fixing member, 13a...shaft portion as insertion portion, 13b...head portion as clamping portion, 14...blocking member, 15...cut bolt as insertion portion, 16...nut as clamping portion, 41...magnet, 42...magnet case, 42a...base portion, 42b...protruding portion as insertion portion, 43...insertion column portion as insertion portion, 44...insertion plate portion as insertion portion, 100...foundation, 112...rising portion, 112a...side surface, 131...reinforcement bar, 132...insert, 132a...connecting hole.

Claims

1. A rising section made of concrete, an insert embedded in the rising portion and having a connecting hole that opens on a side surface of the rising portion; An insert bar connected to the connecting hole; A foundation formwork used to form a foundation comprising: a formwork body provided with a plurality of through holes; a temporary fixing member for temporarily fixing the insert to the form body, the temporary fixing member being disposed on the inner surface of the form body so that the connecting hole communicates with the through hole; a closing member that is detachable from the formwork body; Equipped with The temporary fixing member has an insertion portion that is inserted into the through hole and connected to the connecting hole, and a clamping portion that is arranged on the outer surface of the formwork body and connected to the insert via the insertion portion, and clamps the formwork body together with the insert, The blocking member is a foundation formwork capable of blocking the through hole.

2. The temporary fixing member is constituted by a bolt, the insertion portion is formed by a shank of the bolt, The foundation formwork according to claim 1 , wherein the clamping portion is formed by the head of the bolt.

3. The insertion portion is constituted by a cut bolt, The foundation formwork according to claim 1 , wherein the clamping portion is constituted by a nut.

4. The foundation formwork according to claim 3, wherein the cut bolts are used as the reinforcing bars.

5. The foundation formwork according to claim 1 , wherein a plurality of the through holes are provided in the width direction of the formwork body.

6. The foundation formwork according to claim 1 , wherein a plurality of the through holes are provided in the vertical direction.

7. The foundation formwork according to claim 1 , wherein the closing member has an insertion portion that is inserted into the through hole.

8. The formwork body is made of metal, The foundation formwork according to claim 7 , wherein the closing member has a magnet.

9. The foundation formwork described in claim 8, wherein the blocking member has a metal magnet case having a base portion that is arranged on the outer surface of the formwork body and that houses the magnet, and a protrusion portion that protrudes from the base portion as the insertion portion.

10. the magnet is arranged to contact the outer surface of the formwork body; The foundation formwork according to claim 8 , wherein the insert is fixed to the magnet.

11. A method for forming a foundation using the foundation formwork according to claim 1, comprising: an installation process including an operation of installing the form body, an operation of selecting a through hole to be communicated with the connecting hole of the insert from among the plurality of through holes provided in the form body, an operation of temporarily fixing the insert to the form body with the temporary fixing member in a state in which the insert is placed on the inner surface of the form body so that the selected through hole and the connecting hole communicate with each other, and an operation of blocking the through holes into which the insertion portion is not inserted with the blocking member; After the installation step, a pouring step of pouring concrete; After the casting step, a removal step of removing the formwork body, the temporary fixing member, and the blocking member; After the removing step, a connecting step of connecting the insert bar to the connecting hole of the insert; A method for forming a foundation, comprising:

12. A method for forming a foundation using the foundation formwork according to claim 4, comprising: an installation process including an operation of installing the form body, an operation of selecting a through hole to be communicated with the connecting hole of the insert from among the plurality of through holes provided in the form body, an operation of temporarily fixing the insert to the form body with the temporary fixing member in a state in which the insert is placed on the inner surface of the form body so that the selected through hole and the connecting hole communicate with each other, and an operation of blocking the through holes into which the insertion portion is not inserted with the blocking member; After the installation step, a pouring step of pouring concrete; After the casting step, a removal step of removing the formwork body, the clamping portion, and the blocking member; A method for forming a foundation, comprising:

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