Footing fixtures and construction methods for strip foundations

Abstract

The present invention provides a footing device and a method for constructing a strip foundation that facilitate the process of placing side wall formwork for the footing and pouring concrete, thereby shortening the working time. [Solution] The footing fixtures 1 and 2 consist of contact parts 10 and 50 having planar or linear portions that abut against the footing section side wall formwork 30, and fixing parts 20 and 60 that protrude from the contact parts 10 and 50 and can be fixed to the outer surface 42 of the rising section side wall formwork 40. The width w1 of the footing fixtures 1 and 2 is equal to the distance d1 from the footing section side wall formwork 30 to the fixing position of the fixing parts 20 and 60 on the outer surface 42 of the rising section side wall formwork 40. With the fixing parts 20 and 60 fixed to the outer surface 42 of the rising section side wall formwork 40, the footing section side wall formwork 30 is held in contact with the contact parts 10 and 50.

Description

Technical Field

[0001] The present invention relates to a footing tool used for placing concrete of a cloth foundation having a footing part and a rising part rising vertically from the footing part, and a construction method of a cloth foundation using the footing tool.

Background Art

[0002] Conventionally, as a foundation for buildings such as houses and outer walls, a cloth foundation having a horizontal footing part and a rising part which is a foundation beam rising vertically from the footing part, and having an inverted T-shaped cross section has been used.

[0003] A general method for constructing a cloth foundation is to spread crushed stones on the excavated (undercut) part to solidify the ground, pour waste concrete, assemble reinforcing bars for reinforcement, assemble formwork around it, place concrete between the formworks for curing, and remove the formwork after the concrete has hardened. In addition, steps such as excavation, stone spreading and / or waste concrete may be omitted, the order of the above series of methods may be changed, or the construction process of the footing part and the construction process of the rising part may be separated.

[0004] For such construction of a cloth foundation, skilled techniques and many years of experience are required for workers, which takes time and effort. To solve these problems, an integrated product of reinforcing bars and formwork has been developed. For example, Patent Document 1 describes a concrete formwork for a footing foundation, in which a reinforcing bar material in which horizontal bars and vertical bars are connected is accommodated in advance between a pair of inner formworks and outer formworks for footings, and these reinforcing bar materials are supported between the inner formworks and outer formworks for footings, and further, a separator for constructing a footing part is attached between the pair of inner formworks and outer formworks for footings, and a separator for constructing a cloth foundation part is attached to the reinforcing bar material.

[0005] Further, Patent Document 2 describes a support structure of a formwork panel provided with receiving parts for receiving the lower ends of formwork panels on both sides of a base bar formed by lattice-assembling a plurality of reinforcing bars provided on the grounding surface of a structural member. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 8-260481 [Patent Document 2] Japanese Patent Application Publication No. 9-100539 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, when installing footing formwork in a predetermined position, the concrete formwork for footing foundations described in Patent Document 1 requires the installation of a large number of separators between the footing formwork panels to set the pouring width of the footing section. Furthermore, while the formwork panel support structure described in Patent Document 2 allows the formwork panel to be supported at the correct dimensional position without installing separators by inserting the formwork panel into receiving parts provided on both sides of the base reinforcement, commercially available base reinforcement cannot be used as is.

[0008] Furthermore, if the width of the footing is narrow, construction is carried out without using base reinforcement, making it impossible to position the footing in the width direction based on the base reinforcement. In such cases, it is necessary to measure and mark the position for placing the side wall formwork for the footing, which is time-consuming.

[0009] The present invention has been made in view of these circumstances, and aims to provide a footing device and a method for constructing a strip foundation that can facilitate the process of arranging the side wall formwork for the footing and pouring concrete, thereby shortening the working time. [Means for solving the problem]

[0010] The footing device according to claim 1 comprises a contact portion having a planar or linear portion that abuts against the side wall formwork for the footing portion, and a fixing portion that protrudes from the contact portion and can be fixed to the outer surface of the side wall formwork for the rising portion, wherein the width of the footing device is equal to the distance from the side wall formwork for the footing portion to the fixing position of the fixing portion on the outer surface of the side wall formwork for the rising portion, and the side wall formwork for the footing portion is held in contact with the contact portion while the fixing portion is fixed to the outer surface of the side wall formwork for the rising portion.

[0011] The footing fixture according to claim 2 is characterized in that, in addition to the configuration of claim 1, the contact portion has a width equal to the distance from the footing portion side wall formwork to the edge of the rising portion side wall formwork, at least a portion of which is equal to the distance from the footing portion side wall formwork to the edge of the rising portion side wall formwork, the fixing portion is provided protruding in the width direction of the contact portion, and the footing portion side wall formwork can be positioned in contact with the side of the contact portion opposite to the side from which the fixing portion protrudes, with the fixing portion fixed to the outer surface of the rising portion side wall formwork.

[0012] The footing device according to claim 3 is characterized in that, in addition to the configuration of claim 2, the fixing portion is an L-shaped locking piece in side view that extends in the width direction from the upper end of the contact portion and hangs down.

[0013] The footing fixture according to claim 4 is characterized in that, in addition to the configuration of claim 3, the contact portion is rectangular in side view and made of wood, resin, or metal.

[0014] The footing device according to claim 5 is characterized in that, in addition to the configuration of claim 1, the fixing portion comprises a locking member and a connecting member that connects the locking member and the contact portion, and includes an L-shape in side view where the locking member and the connecting member of the fixing portion are connected, and includes an L-shape in side view where the connecting member and the contact portion of the fixing portion are connected.

[0015] The footing device according to claim 6 is characterized in that, in addition to the configuration of claim 5, it consists of a rod-shaped member, and the fixing part is characterized in that one end of the connecting member is clamped and fixed between two locking members.

[0016] The footing fixture according to claim 7 is characterized in that, in addition to the configuration of claim 6, it includes an F-shape in side view, in which two connecting members are arranged parallel to each other and spaced apart, and the other end of each connecting member is connected to the contact portion.

[0017] The construction method for a strip foundation according to claim 8 is characterized by including a concrete pouring step of using a footing device according to any one of claims 1 to 7 to fix the fixing portion of the footing device to the outer surface of the side wall formwork for the rising portion, arranging a plurality of footing devices spaced apart along the side wall formwork for the rising portion, positioning the side wall formwork for the footing portion by bringing it into contact with the side opposite to the side where the fixing portion of the contact portion protrudes, or with the side where the fixing portion protrudes, fixing the side wall formwork for the footing portion while the contact portion holds the inner or outer surface of the side wall formwork for the footing portion, and pouring concrete.

[0018] The construction method for a strip foundation according to claim 9 is characterized in that, in addition to the configuration of claim 8, the fixing part of the footing device is engaged with a connector on the outer surface of the side wall formwork for the rising section that connects two adjacent side wall formworks for the rising section.

[0019] The construction method for a strip foundation according to claim 10 is characterized in that, in addition to the configuration of claim 8, the footing device is removed after the concrete has been poured in the concrete pouring process. [Effects of the Invention]

[0020] According to the present invention, the process of arranging the side wall formwork for the footing and pouring concrete can be easily carried out, thereby shortening the working time. [Brief explanation of the drawing]

[0021] [Figure 1] This is an explanatory diagram showing a first embodiment of the footing device according to the present invention. [Figure 2] This is a cross-sectional view illustrating the construction method of a strip foundation using the footing device. [Figure 3]It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool. [Figure 4] It is a side perspective view explaining the construction method of FIG. 3. [Figure 5] It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool. [Figure 6] It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool. [Figure 7] It is an explanatory view showing a second embodiment of the footing tool according to the present invention. [Figure 8] It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool. [Figure 9] It is a side perspective view explaining the construction method of FIG. 8. [Figure 10] It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool. [Figure 11] It is a cross-sectional view explaining the construction method of a cloth foundation using the same footing tool.

Embodiments for Carrying out the Invention

[0022] Hereinafter, the embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is an explanatory view showing a first embodiment of the footing tool according to the present invention. FIGS. 2, 3, 5, and 6 are cross-sectional views explaining the construction method of a cloth foundation using the same footing tool. FIG. 4 is a side perspective view showing the lower part of the side wall formwork for the rising part explaining the construction method of FIG. 3.

[0023] FIG. 7 is an explanatory view showing a second embodiment of the footing tool according to the present invention. FIGS. 8, 10, and 11 are cross-sectional views explaining the construction method of a cloth foundation using the same footing tool. FIG. 9 is a side perspective view showing the lower part of the side wall formwork for the rising part explaining the construction method of FIG. 8.

[0024] The footing devices 1 and 2 according to the present invention are used for concrete pouring of a strip foundation F having a footing section A and a rising section B that rises vertically from the footing section A, as shown in Figures 6 and 11. The footing devices 1 and 2 consist of contact sections 10 and 50 and fixing sections 20 and 60, as shown in Figures 1 and 7.

[0025] The contact portions 10 and 50 have planar or linear parts that contact the footing side wall formwork 30. The shape of the contact portions 10 and 50 is arbitrary as long as the contact portions 10 and 50 can hold the footing side wall formwork 30. For example, they may be solid or hollow three-dimensional shapes, rod shapes, plate shapes, etc., and may have a rectangular or approximately L-shape when viewed from the side. If the contact portions 10 and 50 are three-dimensional shapes such as rectangular parallelepipeds, the part that contacts the footing side wall formwork 30 is planar, and if the contact portions 10 and 50 are rod shapes, the part that contacts the footing side wall formwork 30 is linear. Note that the footing side wall formwork 30 and the rising side wall formwork 40 use the same reference numerals because the same formwork can be used for footing fixture 1 and footing fixture 2.

[0026] Furthermore, while the vertical length and thickness of the contact portions 10 and 50 are arbitrary, it is preferable that they be long enough to reach near the top surface of the lean concrete LC, or long enough to contact the lean concrete LC layer, when the fixing portions 20 and 60 are locked to the outer surface 42 of the side wall formwork 40 for the rising portion. In this case, more stable holding of the side wall formwork 30 for the footing portion becomes possible. The material of the contact portions 10 and 50 is arbitrary, but examples include wood, resin, and metal.

[0027] The shape and material of the footing section side wall formwork 30 and the rising section side wall formwork 40 used in construction are arbitrary, and formwork made of wood, resin, metal, etc. is used. For the footing section side wall formwork 30, metal lath, perforated metal, FRP mesh, etc. are preferred.

[0028] The fixing parts 20 and 60 are provided protruding from the contact parts 10 and 50 and can be fixed to the outer surface 42 of the side wall formwork 40 for the rising section. The shape, size, position, etc. of the fixing parts 20 and 60 are arbitrary as long as they can be fixed to the outer surface 42 of the side wall formwork 40 for the rising section, but shapes such as L-shape, J-shape (hook shape), or clamp shape are possible.

[0029] Furthermore, the mounting positions of the fixing parts 20 and 60 may be at the upper end 16 of the contact parts 10 and 50, or at any other height position other than the upper end 16. The material of the fixing parts 20 and 60 is arbitrary, but examples include metal, resin, wood, etc. If the material of the contact parts 10 and 50 and the fixing parts 20 and 60 are the same, they may be formed as a single unit.

[0030] The width w1 (w1a, w1b) of the footing fixtures 1 and 2 is equivalent to the distance d1 (d1a, d1b) from the footing section side wall formwork 30 to the fixing position of the fixing parts 20 and 60 on the outer surface 42 of the rising section side wall formwork 40, as shown in Figures 6 and 11. The width w1 of the footing fixtures 1 and 2 is the width in the lateral direction of the fixture, as shown in Figures 1 and 7, but more specifically, it is the width from the position where the contact parts 10 and 50 contact the footing section side wall formwork 30 to the fixing position of the fixing parts 20 and 60. Note that "equivalent" means almost the same, but this expression is used considering the thickness of the elements constituting the formwork and fixtures, and the shrinkage of the concrete C after hardening.

[0031] Furthermore, the fixing positions of the fixing parts 20 and 60 on the outer surface 42 of the side wall formwork 40 for the rising section are, for example, the connecting members 44 that connect two adjacent side wall formwork 40 for the rising section. In this case, the distance d1 is the distance from the inner surface 32 or outer surface 34, which is the contact surface with the contact parts 10 and 50 of the side wall formwork 30 for the footing section, to the connecting member 44 on the outer surface 42 of the side wall formwork 40 for the rising section. The width w1 of the footing fixtures 1 and 2 is formed to be approximately the same length as the distance d1.

[0032] The footing fixtures 1 and 2 are designed to hold the footing side wall formwork 30 against the contact parts 10 and 50, with the fixing parts 20 and 60 fixed to the outer surface 42 of the rising section side wall formwork 40, in order to pour concrete C. This allows the position of the footing side wall formwork 30 to be determined immediately, regardless of the presence or absence of base reinforcement. Furthermore, since the footing side wall formwork 30 can be held in place thereafter, the process of pouring concrete C can be carried out easily, and the working time can be shortened.

[0033] As shown in Figure 1, it is preferable that the footing fixture 1 according to the present invention has a width w2 in at least a portion of the contact portion 10 that is equal to the distance d2 from the side wall formwork 30 for the footing portion of the strip foundation F to be constructed, as shown in Figure 6, to the edge 46 of the side wall formwork 40 for the rising portion. In this case, the distance d2 depends on the shape of the formwork, but is generally the distance from the inner surface 32 of the side wall formwork 30 for the footing portion to the edge 46 of the bottom rib on the outer surface 42 of the side wall formwork 40 for the rising portion. The contact portion 10 is formed such that at least a portion of its lateral width w2 is approximately the same length as the distance d2.

[0034] When the contact portion 10 of the footing fixture 1 has a width w2 equivalent to the aforementioned distance d2, the fixing portion 20 is provided protruding in the width direction of the contact portion 10, and with the fixing portion 20 fixed to the outer surface 42 of the side wall formwork 40 for the rising portion, the side wall formwork 30 for the footing portion can be positioned in contact with the side 14 opposite to the side of the contact portion 10 from which the fixing portion protrudes. Preferably, the fixing portion 20 is an L-shaped locking piece in side view that extends and hangs down in the width direction from the upper end 16 of the contact portion 10.

[0035] The shape of the contact portion 10 is arbitrary as long as at least a part of it has a width w2 equal to the distance d2 between the formwork and the contact portion 10 can hold the side wall formwork 30 for the footing. For example, it may consist of a solid or hollow three-dimensional shape, a rod shape, a plate shape, etc., and is preferably rectangular in side view. If there is base reinforcement, the upper part may have a width w2 equal to the distance d2 between the formwork, and the lower part may be structured to avoid the base reinforcement.

[0036] Alternatively, as shown in Figure 7, in another footing fixture 2 according to the present invention, the fixing portion 60 preferably consists of a locking member 62 and a connecting member 64 that connects the locking member 62 and the contact portion 50. In this case, the footing fixture 2 includes an L-shape in side view where the locking member 62 and the connecting member 64 of the fixing portion 60 are connected, and an L-shape in side view where the connecting member 64 and the contact portion 50 of the fixing portion 60 are connected. The locking member 62 and the connecting member 64, and the connecting member 64 and the contact portion 50 are connected substantially perpendicular to each other in each combination.

[0037] The footing fixture 2 is preferably made of a rod-shaped member. In this case, it is more preferable that the fixing part 60 includes two locking members 62, and one end of the connecting member 64 is sandwiched and fixed between the two locking members 62. This makes it possible to stably hold the footing side wall formwork 30 with the fixing part 60 locked to the outer surface 42 of the rising part side wall formwork 40, even if the footing fixture 2 is made of a rod-shaped member.

[0038] Furthermore, it is even more preferable that the footing fixture 2 includes an F-shape in side view, where two connecting members 64 are arranged parallel to each other and spaced apart, one end of each connecting member 64 is clamped and fixed between two locking members 62, and the other end of each connecting member 64 is connected to the contact portion 50. The strength of the fixture can be increased by using metal rod-shaped members, increasing the number of members constituting the footing fixture 2, or adjusting the diameter.

[0039] Next, we will explain the construction method of the strip foundation F using the footing devices 1 and 2 described above. First, the ground G is excavated, crushed stone S is laid in the excavated area and compacted, lean concrete LC is poured and hardened. Then, as shown in Figure 2, reinforcing bars R are assembled on top of the concrete and reinforced, and a formwork 40 for the rising section B, which is the formwork for the rising section B, is assembled around it, made of plywood, resin, metal plate, etc.

[0040] Next, in the concrete pouring process, the footing section A and the rising section B are poured separately. As shown in Figures 3, 4, 8, and 9, the fixing parts 20 and 60 of the footing fixtures 1 and 2 are fixed to the outer surface 42 of the side wall formwork 40 for the rising section, and multiple footing fixtures 1 and 2 are placed spaced apart along the side wall formwork 40 for the rising section.

[0041] The footing section side wall formwork 30 is positioned by bringing it into contact with the side opposite to the side 14, 54 or the side 52 of the fixed portion of the multiple contact portions 10, 50 that are positioned opposite to the side where the fixed portion is protruding. As shown in Figure 5, 10, with the contact portions 10, 50 holding the inner surface 32 or outer surface 34 of the footing section side wall formwork 30, the footing section side wall formwork 30 is fixed and concrete C is poured. Once the footing section A has hardened, concrete C is poured between the formwork of the rising section B, cured, and after the concrete C has hardened, the formwork is removed.

[0042] In the concrete pouring process of the present invention, the fixing parts 20 and 60 of the footing fixtures 1 and 2 are fixed to the outer surface 42 of the side wall formwork 40 for the rising section, but the fixing position and method are arbitrary. For example, possible fixing positions include the connectors 44 of the side wall formwork 40 for the rising section, the reinforcing ribs extending in the vertical direction, the bottom ribs at the lower end, etc., and possible fixing methods include locking, fitting, clamping, etc. Preferably, the fixing parts 20 and 60 of the footing fixtures 1 and 2 are locked to the connectors 44 on the outer surface 42 of the side wall formwork 40 for the rising section that connects two adjacent side wall formwork 40 for the rising section.

[0043] Here, we will describe the connector 44 for the side wall formwork 40 of the rising section. However, the structure of the side wall formwork 40 of the rising section and the structure for connecting adjacent side wall formwork 40 of the rising section vary. For this reason, the structure is not limited to the following, and any structure is acceptable as long as two adjacent side wall formwork 40 of the rising section are connected and the fixing parts 20 and 60 of the footing fixtures 1 and 2 can be fixed.

[0044] Generally, the side wall formwork 40 for the rising section has holes drilled in the connecting members 42a, which are ribs at both ends of its outer surface 42. A guide plate 42b is fixed to the connecting member 42a by welding or the like, spaced apart from the connecting member 42a, and the guide plate 42b has guide holes drilled in it that correspond to the holes in the connecting member 42a. In some cases, the guide plate 42b may not be provided. The connector 44 consists of a connecting rod 44a that can be inserted into the holes in the connecting member 42a, and a roughly J-shaped clamp 44b whose base end is connected to the connecting rod 44a and whose tip is bent.

[0045] The connecting rod 44a is slid laterally and rotated within the holes of the connecting members 42a of two adjacent side wall formwork 40 for the rising section, so that the clamp 44b holds the two adjacent connecting members 42a in place, as shown in Figures 4 and 9. In this case, it is preferable that the fixing parts 20 and 60 of the footing fixtures 1 and 2 are engaged with the exposed portion of the connecting rod 44a of the connector 44 on the outer surface 42 of the side wall formwork 40 for the rising section that is not inserted into the connecting member 42a. In this way, the fixing parts 20 and 60 of the footing fixtures 1 and 2 can be easily fixed by utilizing existing equipment.

[0046] The method of fixing the footing side wall formwork 30 is arbitrary, given that the contact parts 10 and 50 are holding the inner surface 32 or outer surface 34 of the footing side wall formwork 30. For example, as shown in Figure 5, if the back surface 14 opposite to the side where the fixing part of the contact part 10 protrudes is in contact with the inner surface 32 of the footing side wall formwork 30, the footing side wall formwork 30 may be fixed by covering it with soil from the outside. Alternatively, as shown in Figure 10, if the side 52 where the fixing part of the contact part 50 protrudes is in contact with the outer surface 34 of the footing side wall formwork 30, the overlapping portion of adjacent footing side wall formwork 30 may be fixed using fasteners such as wire, cable ties, or fixing brackets. The footing side wall formwork 30 is fixed in this manner, and concrete C is poured.

[0047] Furthermore, it is preferable to remove the footing fixtures 1 and 2 after the concrete C has been poured during the concrete pouring process. As shown in Figure 5, the removal of the footing fixtures 1 and 2 after pouring should be done before hardening if the contact portion 10 is in contact with the inner surface 32 of the footing side wall formwork 30 and is located within the fresh concrete C. Alternatively, as shown in Figure 10, if the contact portion 50 is in contact with the outer surface 34 of the footing side wall formwork 30, it should be removed after hardening. The removed footing side wall formwork 30 can then be washed to remove any fresh concrete C and soil, and the footing fixtures 1 and 2 can be reused.

[0048] The following describes the footing fixtures 1 and 2 of the present application, and the construction method of a strip foundation using them, with reference to examples. [Examples]

[0049] In this embodiment, as shown in Figure 6, an exterior wall strip foundation F consisting of a footing A and a rising section B is constructed. Because the width of footing A is narrow, the structure does not have base reinforcement at the bottom.

[0050] As shown in Figure 1, the footing fixture 1 consists of a contact portion 10 and a fixing portion 20. The contact portion 10 is a rectangular wooden parallelepiped that is rectangular in side view. The contact portion 10 has a side surface with a width w2 that is equal to the distance d2 from the footing portion side wall formwork 30 to the edge 46 of the rising portion side wall formwork 40.

[0051] The contact portion 10 has a front surface 12 on the side where the fixing portion 20 protrudes, a back surface 14 on the opposite side, an upper surface 16 on the upper end where the fixing portion 20 is attached and is not immersed in concrete C, and a lower surface on the side that is immersed. A metal locking piece, the fixing portion 20 which is L-shaped in side view and protrudes and hangs down from the upper surface 16, is screwed to the upper surface 16 of the contact portion 10.

[0052] In this embodiment, the width w1a of the footing fixture 1, that is, the distance from the back surface 14 of the contact portion 10 to the locking corner of the fixing portion 20, is equivalent to the distance d1a from the inner surface 32 of the footing portion side wall formwork 30 to the connecting rod 44a, which is the fixing position of the fixing portion 20, on the outer surface 42 of the rising portion side wall formwork 40. The width w1a and vertical length of the footing fixture 1 are adjusted to match the size of the footing portion A to be constructed.

[0053] Next, we will explain the construction method for the exterior wall strip foundation F using footing equipment 1. First, as shown in Figure 2, the ground G is excavated, crushed stone S is laid in the excavated area and compacted, lean concrete LC is poured, and reinforcing bars R are assembled on top of it to provide reinforcement, and a metal formwork for the rising section B is assembled around the reinforcing bars R. The side wall formwork 40 for the rising section has a roughly U-shaped cross-section that opens outwards and extends in the longitudinal direction of the strip foundation F. The upper end of the side wall formwork 40 for the rising section is higher than the upper end of the reinforcing bars R.

[0054] The side wall formwork 40 for the rising section has holes drilled in the connecting members 42a at both ends of its outer surface 42 and in the guide plates 42b provided spaced apart nearby. The connector 44 that fixes two adjacent connecting members 42a consists of a connecting rod 44a inserted through the holes in the connecting members 42a and the guide plate 42b, and a roughly J-shaped clamp 44b whose base end is connected to the connecting rod 44a. The connecting rod 44a of the connector 44 is slid and rotated laterally within the holes of the two adjacent connecting members 42a so that the clamp 44b clamps and fixes the two connecting members 42a. The connector 44 is provided at two locations, above and below the connecting members 42a at both ends of the outer surface 42 of the side wall formwork 40 for the rising section.

[0055] Next, regarding the concrete pouring process, since the footing section A and the rising section B are poured separately, we will first explain the pouring process for footing section A.

[0056] Before pouring the concrete C, as shown in Figures 3 and 4, the fixing portion 20 of the footing fixture 1 is locked to the connecting rod 44a of the connector 44 that fixes two adjacent connecting members 42a below the connecting member 42a on the outer surface 42 of the side wall formwork 40 for the rising section. The locking position is between the connecting member 42a of the connecting rod 44a and the guide plate 42b. At this time, the contact portion 10 of the footing fixture 1 has its front surface 12 in contact with the bottom rib, which is the edge 46 of the outer surface 42 of the side wall formwork 40 for the rising section. Similarly, multiple footing fixtures 1 are placed spaced apart along the side wall formwork 40 for the rising section.

[0057] Positioning is performed by bringing the inner surface 32 of the footing section side wall formwork 30, which is a metal lath formwork, into contact with the back surface 14 of the contact portion 10 of the footing device 1 that is locked to the side wall formwork 40 for the rising section. Similarly, multiple footing section side wall formworks 30 are arranged along the side wall formwork 40 for the rising section without any gaps.

[0058] As shown in Figure 5, with the contact portion 10 holding the inner surface 32 of the footing side wall formwork 30, the footing side wall formwork 30 is fixed by covering it with soil from the outside, and concrete C is poured. After pouring, before it hardens, the footing fixture 1 is removed. Once the footing A has hardened, as shown in Figure 6, concrete C is poured between the formwork of the rising portion B, cured, and after the concrete C has hardened, the formwork is removed.

[0059] As described above, by using the footing device 1 of this embodiment, regardless of the presence or absence of base reinforcement, the positioning of the footing section side wall formwork 30 can be achieved simply by engaging the fixing part 20 with the rising section side wall formwork 40, without the need for marking out or other methods. Furthermore, when pouring concrete C, the contact part 10 holds the footing section side wall formwork 30, preventing the footing section side wall formwork 30 from collapsing inward, making construction easy and thus reducing working time. In addition, since the footing device 1 is removed before hardening, there are no problems with the appearance of the strip foundation F, and it can also be reused after washing away the fresh concrete C. [Examples]

[0060] In this embodiment, as in Embodiment 1, an exterior wall strip foundation F consisting of a footing section A and a rising section B is constructed, as shown in Figure 11. Because the width of footing section A is narrow, the structure does not have base reinforcement at the bottom. The differences from Embodiment 1 will be explained below.

[0061] As shown in Figure 7, the footing fixture 2 consists of a contact portion 50 and a fixing portion 60, and is formed from a rod-shaped metal member. The contact portion 50 is made by welding together two rod-shaped members to form a single unit. The length of the contact portion 50 is such that it can contact the lean concrete LC layer when the fixing portion 60 is locked to the outer surface 42 of the side wall formwork 40 for the rising portion.

[0062] The fixing portion 60 consists of two locking members 62 and two connecting members 64. The two connecting members 64 are arranged parallel to each other and spaced apart, and one end of each connecting member 64 is welded approximately perpendicular to the locking members 62 so as to be sandwiched and fixed between the two parallel locking members 62, resulting in a shape in which the lateral sides of two T-shaped structures are connected when viewed from the side. The other ends of each connecting member 64 are welded approximately perpendicular to the contact portion 50, forming an F-shape when viewed from the side.

[0063] The width w1b of the footing fixture 2 formed in this manner is equivalent to the distance d1b from the outer surface 34 of the footing section side wall formwork 30 to the connecting rod 44a, which is the fixing position of the fixing part 60 on the outer surface 42 of the rising section side wall formwork 40.

[0064] Next, we will explain the construction method for the exterior wall strip foundation F using footing fixture 2. The difference from Example 1 is that in this example, the ground G is excavated only to the depth of the crushed stone S. Therefore, not only the rising section B but also the footing section A is exposed above ground. The configuration of the side wall formwork 40 for the rising section, which is assembled on the lean concrete LC layer, is the same as in Example 1.

[0065] Next, we will explain the concrete pouring process for footing section A. Before pouring the concrete C, as shown in Figures 8 and 9, the fixing portion 60 of the footing fixture 2 is locked to the connecting rod 44a of the connector 44 that fixes two adjacent connecting members 42a below the connecting member 42a on the outer surface 42 of the side wall formwork 40 for the rising section. Specifically, the lower corner formed by the connection of the locking member 62 and the connecting member 64 of the fixing portion 60 is locked to the connecting rod 44a. The locking position is between the connecting member 42a of the connecting rod 44a and the guide plate 42b. Similarly, multiple footing fixtures 2 are placed spaced apart along the side wall formwork 40 for the rising section.

[0066] The footing fixture 2, which is locked to the side wall formwork 40 for the rising section, is positioned by bringing the side wall formwork 30 for the footing section, which is a metal lath formwork, into contact with the side 52, that is, the inside, of the fixing portion of the contact portion 50. Similarly, multiple side wall formwork 30 for the footing section are arranged along the side wall formwork 40 for the rising section without any gaps.

[0067] As shown in Figure 10, with the contact portion 50 holding the outer surface 34 of the footing side wall formwork 30, the overlapping portions of adjacent footing side wall formwork 30 are fixed using binding wire, and concrete C is poured. After pouring and hardening, the footing fixture 2 is removed. Once footing A has hardened, as shown in Figure 11, concrete C is poured between the formwork of the rising portion B, cured, and after concrete C has hardened, the formwork is removed.

[0068] As described above, by using the footing device 2 of this embodiment, regardless of the presence or absence of base reinforcement, the positioning of the footing section side wall formwork 30 can be achieved simply by engaging the fixing part 60 with the rising section side wall formwork 40, without the need for marking out or other methods. Furthermore, when pouring concrete C, the contact part 50 holds the footing section side wall formwork 30, preventing the footing section side wall formwork 30 from falling outwards, making construction easy and thus reducing working time. In addition, since the footing device 2 is positioned on the outside of the footing section side wall formwork 30, there is no problem with the appearance of the strip foundation F, and since the ready-mix concrete C does not directly adhere to it, cleaning is unnecessary.

[0069] This invention allows for various embodiments and modifications without departing from the broad spirit and scope of the invention. Furthermore, the embodiments described above are for illustrative purposes only and do not limit the scope of the invention. In other words, the scope of the invention is indicated not by the embodiments, but by the claims. Various modifications made within the scope of the claims and the equivalent scope of the meaning of the invention are considered to be within the scope of this invention. [Industrial applicability]

[0070] As described above, the present invention provides a footing device consisting of a contact portion and a fixing portion that can be locked to the outer surface of the side wall formwork for the rising portion, thereby facilitating the process of arranging the side wall formwork for the footing portion and pouring concrete, and shortening the working time. It also provides a method for constructing a strip foundation using the footing device. [Explanation of symbols]

[0071] 1. Footing equipment 2. Footing equipment 10...Abutting part 12. The side with the protruding fixing part (front) 14. The side opposite to the side where the fixing part protrudes (back). 16...Top end (top surface) 20... Fixed part 30.. Side wall formwork for footing section 32..Inner surface 34...Outside surface 40.. Side wall formwork for rising section 42...Outer surface 42a... Connecting member 42b... Guide plate 44..Connector 44a...Connecting rod 44b... Clamp 46... Edge 50...Contact part 52...the side with the protruding fixing part 54...the side opposite the side where the fixing part protrudes 60...Fixed part 62...Locking member 64. Connecting parts

Claims

1. A footing tool used for concrete pouring of a strip foundation having a footing section and a rising section that rises vertically from the footing section, A contact portion having a planar or linear portion that abuts against the side wall formwork for the footing section, It consists of a fixing part that protrudes from the contact portion and can be fixed to the outer surface of the side wall formwork for the rising portion, The width of the footing fixture is equal to the distance from the side wall formwork for the footing section to the fixing position of the fixing part on the outer surface of the side wall formwork for the rising section. A footing device characterized in that the fixing portion is fixed to the outer surface of the side wall formwork for the rising portion, and the side wall formwork for the footing portion is held in contact with the contact portion.

2. The abutment portion has a width that is at least part of the distance from the footing portion side wall formwork to the edge of the rising portion side wall formwork, The fixing portion is provided protruding in the width direction of the contact portion, The footing device according to claim 1, characterized in that the fixing portion is fixed to the outer surface of the side wall formwork for the rising portion, and the side wall formwork for the footing portion can be positioned in contact with the side of the contact portion opposite to the side on which the fixing portion protrudes.

3. The footing device according to claim 2, characterized in that the fixing portion is an L-shaped locking piece in side view that extends in the width direction from the upper end of the contact portion and hangs down.

4. The footing device according to claim 3, characterized in that the contact portion is rectangular in side view and made of wood, resin, or metal.

5. The fixing portion consists of a locking member and a connecting member that connects the locking member and the contact portion. The fixing portion includes an L-shape in side view where the locking member and the connecting member are connected, The footing device according to claim 1, characterized in that it includes an L-shaped side view in which the connecting member and the contact portion of the fixed portion are connected.

6. It consists of rod-shaped members, The footing device according to claim 5, characterized in that one end of the connecting member is clamped and fixed between the two locking members.

7. The two connecting members are arranged parallel to each other and spaced apart. The footing device according to claim 6, characterized in that it includes an F-shape in side view where the other end of each connecting member is connected to the contact portion.

8. A method for constructing a strip foundation having a footing portion and a rising portion that rises vertically from the footing portion, using a footing device according to any one of claims 1 to 7, The fixing portion of the footing fixture is fixed to the outer surface of the side wall formwork for the rising section, and multiple footing fixtures are arranged spaced apart along the side wall formwork for the rising section. Position the footing section by bringing the side wall formwork for the footing section into contact with the side opposite to the side of the contact section where the fixing portion protrudes, or with the side where the fixing portion protrudes. A method for constructing a strip foundation, characterized by including a concrete pouring step of fixing the footing side wall formwork while the contact portion holds the inner or outer surface of the footing side wall formwork, and pouring concrete.

9. The method for constructing a strip foundation according to claim 8, characterized in that the fixing portion of the footing device is engaged with a connector on the outer surface of the side wall formwork for the rising portion that connects two adjacent side wall formworks for the rising portion.

10. The method for constructing a strip foundation according to claim 8, characterized in that the footing device is removed after concrete has been poured in the concrete pouring step.

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