Formwork jig and formwork jig device

Abstract

To provide a formwork jig and a formwork jig device capable of easily and surely forming a notch in a cloth foundation part in a foundation concrete of a house and being repeatedly usable without staining the surroundings.SOLUTION: A short straight portion jig 10 is a jig attached to a foundation formwork K in order to form an entrance drop GO which is a band-shaped notch with a predetermined depth in an upper portion of a side surface of a cloth foundation part NK in foundation concrete of a house, including: a rectangular body plate 11, a bottom plate 12 extending forward from the entire lower side of the body plate 11 to a length corresponding to the predetermined depth d; a space holding piece 13 extending forward from a position spaced apart from the bottom plate 12 on a front surface of the body plate 11 to a length corresponding to the predetermined depth; and an attaching portion 14 provided on the body plate 11 and fixed to an upper portion of an inner formwork K1 in the foundation formwork K.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a formwork jig and a formwork jig device that are used together with a foundation formwork when forming foundation concrete at the entrance of a house, etc. [Background technology]

[0002] Conventionally, in order to form a concrete foundation for a house, a number of foundation forms are arranged on the ground, concrete is poured into the space surrounded by these foundation forms, and the concrete is allowed to harden (see, for example, Patent Document 1, etc.). In particular, in the concrete foundation formed at the entrance of a house, a design in which decorative materials such as tiles are attached in a strip shape with a width of about several centimeters to 10 cm in the height direction to the upper part of the side of the slab foundation that faces the entrance dirt floor, which is the rising part, is preferred. In order to secure a space for attaching the tiles, etc. to the slab foundation in advance, the concrete foundation is constructed so that the upper part of the slab foundation that faces the entrance dirt floor becomes a strip-shaped cutout part. This strip-shaped cutout part at the upper part of the slab foundation is sometimes called the "entrance drop".

[0003] Specifically, concrete is poured with a polystyrene foam plate attached to the top of the inner formwork of the outer and inner foundation formwork that is installed to form the slab footing. After the concrete has hardened, the polystyrene foam plate is removed from the inner formwork when the foundation formwork is dismantled. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2-157358 Summary of the Invention [Problem to be solved by the invention]

[0005] However, there is a problem that it is time-consuming to prepare polystyrene foam boards of the desired dimensions and shapes at the construction site for each construction.Furthermore, when removing the polystyrene foam boards to dismantle the foundation formwork after construction, polystyrene waste and fragments scatter around, which requires cleaning work to remove them.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a formwork jig and formwork jig device that can easily and reliably form cuts in the slab portion of the foundation concrete of a house, and can be used repeatedly without soiling the surrounding area. [Means for solving the problem]

[0007] The formwork jig of the present invention is a jig that is attached to a foundation formwork to form a band-shaped cut-out portion of a predetermined depth in the upper part of the side of a slab footing in the foundation concrete of a house, and comprises a rectangular main body plate, a bottom plate extending forward from the entire lower edge of the main body plate to a length corresponding to the predetermined depth, a spacing retaining piece extending forward from a position spaced above the bottom plate on the front side of the main body plate to a length corresponding to the predetermined depth, and a mounting portion provided on the main body plate and fixed to the upper part of the foundation formwork.

[0008] According to this configuration, when the formwork jig is fixed to the upper part of the foundation formwork via the mounting part, the front ends of the bottom plate and the spacing piece abut against the side of the foundation formwork, the spacing between the side of the foundation formwork and the main plate is maintained at a predetermined depth, and a space of a predetermined depth is formed surrounded by the bottom plate and the rectangular main plate. Therefore, by pouring concrete to a predetermined height with the formwork jig attached to the foundation formwork, a band-shaped cutout portion of a predetermined depth can be formed in the upper part of the side of the continuous foundation part. In addition, when the foundation formwork is dismantled, no waste or fragments are generated as in the case of conventional polystyrene foam plates, and after use with the foundation formwork is finished, it can be attached to another foundation formwork and used. Therefore, it is possible to easily and reliably form a cutout portion in the continuous foundation part of the foundation concrete of a house, and it is possible to repeatedly use it without soiling the surroundings.

[0009] In addition, the mounting portion is configured to allow adjustment of the mounting height of the main body plate relative to the foundation formwork.

[0010] According to this configuration, by adjusting the mounting height of the main body plate relative to the formwork via the mounting portion, cut portions can be formed at various height positions of the slab foundation portion.

[0011] In addition, the mounting portion extends upward from the main plate in a plate-like shape, and has a long, elongated adjustment hole in the height direction.The mounting portion is positioned at any height by a fastener inserted into the adjustment hole and fixed to the foundation formwork.

[0012] According to this configuration, the mounting height of the main body plate can be easily and freely adjusted by changing the fastening position of the fastener in the adjustment hole.

[0013] The mounting portion is provided in a plate-like shape extending forward from the upper end of the main body plate and is fixed to the foundation formwork.

[0014] According to this configuration, the form jig can be securely fixed to the upper part of the foundation form via a mounting portion having an extremely simple structure.

[0015] The spacing pieces are plate-like pieces arranged parallel to and spaced apart above the bottom plate.

[0016] With this configuration, the front end of the bottom plate and the front end of the spacing retaining piece abut against the side of the foundation formwork at a distance from each other above and below, allowing the entire main body plate to be positioned parallel to the side of the foundation formwork at a specified depth interval without being inclined relative to the side of the foundation formwork.

[0017] The formwork jig is a straight section jig that is provided with one of the main body plates and is attached to the straight section of the foundation formwork.

[0018] According to this configuration, by attaching a formwork jig as a straight section jig to the straight section of the foundation formwork, a band-shaped cut-out portion with a predetermined depth can be formed in the upper part of the side of the straight section of the slab foundation section.

[0019] In addition, the formwork jig is a corner jig in which the two main body plates are integrated into an L-shape when viewed from above, and the bottom plate, the spacing retaining piece, and the mounting portion are provided on each of the main body plates, respectively, and are attached to the corner portions of the foundation formwork.

[0020] According to this configuration, by attaching the formwork jig to the corner portion of the formwork, a band-shaped cut-out portion with a predetermined depth can be formed in the upper part of the side surface of the corner portion of the slab foundation portion.

[0021] The main body plate has the bottom plate and the spacing retaining pieces extending therefrom, with the inner surface of the L-shape in plan view serving as the front surface.

[0022] With this configuration, a band-shaped cut-out portion with a predetermined depth can be formed in the upper part of the side of the corner portion that convex outward in the slab foundation portion.

[0023] The main body plate has the bottom plate and the spacing retaining pieces extending therefrom with the outer surface of the L-shape in plan view serving as the front surface.

[0024] With this configuration, a band-shaped cutout portion with a predetermined depth can be formed in the upper part of the side surface of the corner portion that convex inward in the slab foundation portion.

[0025] In addition, the formwork jig is a jig for a entrance drop that is attached to the inner formwork of the foundation formwork to form a entrance drop, which is a cut portion provided in the slab portion of the foundation concrete at the entrance of a house.

[0026] With this configuration, it is possible to reliably form an entrance drop-down installed in the slab section of the concrete foundation at the entrance of a house.

[0027] The formwork jig device is constructed by combining a plurality of the above-mentioned formwork jigs.

[0028] With this configuration, the formwork jig device, which is composed of a combination of multiple formwork jigs, can be attached to foundation formwork of various shapes and sizes, making it possible to easily and reliably form cut portions in the slab footing of various shapes and sizes in the foundation concrete of a house, and it can be used repeatedly without soiling the surrounding area. [Brief description of the drawings]

[0029] [Figure 1] 1 is a perspective view showing the overall configuration of a foundation formwork to which a formwork jig device according to an embodiment of the present invention is attached. [Diagram 2] 2 is a perspective view showing a continuous foundation portion of a concrete foundation at the entrance of a house, construction of which has been completed using the foundation formwork shown in FIG. 1. FIG. [Diagram 3] FIG. 2 is a perspective view showing a short straight portion jig according to an embodiment. [Figure 4] FIG. 2 is a front view showing a short straight portion jig according to the embodiment. [Diagram 5] FIG. 4 is a rear view showing the short straight portion jig according to the embodiment. [Figure 6] FIG. 4 is a right side view showing the short straight portion jig according to the embodiment. [Figure 7]FIG. 2 is a plan view showing a short straight portion jig according to an embodiment. [Figure 8] FIG. 4 is a bottom view showing the short straight portion jig according to the embodiment. [Figure 9] FIG. 2 is a front perspective view showing a state in which a short straight section jig according to an embodiment is attached to a foundation formwork. [Figure 10] FIG. 2 is a rear perspective view showing a state in which a short straight section jig according to an embodiment is attached to a foundation formwork. [Figure 11] FIG. 2 is a perspective view showing a long straight portion jig according to an embodiment. [Figure 12] FIG. 2 is a perspective view showing a corner jig according to an embodiment. [Figure 13] FIG. 2 is a front view showing a corner portion jig according to the embodiment. [Figure 14] FIG. 4 is a rear view showing the corner portion jig according to the embodiment. [Figure 15] FIG. 4 is a right side view showing the corner portion jig according to the embodiment. [Figure 16] FIG. 2 is a left side view showing the corner jig according to the embodiment. [Figure 17] FIG. 2 is a plan view showing a corner jig according to the embodiment. [Figure 18] FIG. 4 is a bottom view showing the corner portion jig according to the embodiment. [Figure 19] 1 is a cross-sectional view showing a state in which a short straight section jig according to an embodiment is attached to a foundation formwork at an upper limit position and concrete is poured. FIG. [Figure 20] 1 is a cross-sectional view showing the state in which the short straight section jig of the embodiment is attached to a foundation formwork at the lowest position and concrete is poured. FIG. [Figure 21] FIG. 11 is a plan view showing a schematic overall configuration of a foundation formwork to which a formwork jig device according to a first modified example is attached. [Figure 22] FIG. 11 is a perspective view showing a corner jig according to a first modified example. [Diagram 23] FIG. 11 is a front view showing a corner jig according to a first modified example. [Figure 24]FIG. 11 is a rear view showing the corner jig according to the first modified example. [Diagram 25] FIG. 11 is a right side view showing the corner jig according to the first modified example. [Figure 26] FIG. 11 is a left side view showing a corner jig according to a first modified example. [Figure 27] FIG. 11 is a plan view showing a corner jig according to a first modified example. [Figure 28] FIG. 11 is a bottom view showing the corner portion jig according to the first modified example. [Figure 29] FIG. 11 is a perspective view showing a short straight portion jig according to a second modified example. [Diagram 30] FIG. 13 is a front view showing a short straight portion jig according to a second modified example. [Diagram 31] FIG. 11 is a rear view showing a short straight portion jig according to a second modified example. [Diagram 32] FIG. 11 is a right side view showing a short straight portion jig according to a second modified example. [Diagram 33] FIG. 13 is a plan view showing a short straight portion jig according to a second modified example. [Diagram 34] FIG. 11 is a bottom view showing a short straight portion jig according to a second modified example. [Diagram 35] FIG. 11 is a cross-sectional view showing the state in which a short straight section jig according to a second modified example is attached to a foundation formwork and concrete is poured. [Diagram 36] FIG. 11 is a perspective view showing a long straight portion jig according to a second modified example. [Figure 37] FIG. 11 is a perspective view showing a corner jig according to a second modified example. [Figure 38] FIG. 11 is a front view showing a corner jig according to a second modified example. [Figure 39] FIG. 11 is a rear view showing the corner jig according to the second modified example. [Diagram 40] FIG. 11 is a right side view showing the corner jig according to the second modified example. [Diagram 41] FIG. 11 is a left side view showing a corner jig according to a second modified example. [Diagram 42] FIG. 11 is a plan view showing a corner jig according to a second modified example. [Diagram 43] FIG. 11 is a bottom view showing a corner jig according to a second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment of an entrance drop jig and an entrance drop jig device embodying a formwork jig and a formwork jig device according to the present invention will be described with reference to the drawings.

[0031] First, the overall configuration of the entrance drop jig device 1 according to the embodiment of the present invention will be described with reference to FIG. 1. FIG. 1 is a perspective view showing the overall configuration of a foundation formwork K to which the entrance drop jig device 1 is attached. FIG. 2 is a perspective view showing a continuous foundation part NK of foundation concrete at the entrance of a house where construction has been completed using the foundation formwork K shown in FIG. 1. As described in the background art, in the foundation concrete formed at the entrance of a house, a design in which decorative materials such as tiles are attached in a strip shape with a width of about several centimeters to 10 cm in the height direction to the upper part of the continuous foundation part NK, which is the rising part, facing the entrance dirt floor is preferred. In order to secure a space in advance in the continuous foundation part NK for attaching the tiles, the foundation concrete is constructed so that the upper part of the continuous foundation part NK facing the entrance dirt floor has a strip-shaped cutout shape (cutout part). In this specification, the cutout part cut in a strip shape with a predetermined depth of about 20 mm in the upper part of the continuous foundation part NK is called the entrance drop.

[0032] The entrance drop jig device 1 is a formwork jig device used to form an entrance drop GO as a strip-shaped cutout at a predetermined depth d in the upper part of the side of the continuous foundation part NK in the foundation concrete at the entrance of a house, as shown in FIG. 2. The entrance drop jig device 1 is attached to a foundation formwork K for forming the continuous foundation part NK, as shown in FIG. 1. The foundation formwork K is composed of an inner formwork K1 formed by arranging and connecting a plurality of formwork panels KP in a rectangular shape in a plan view, and an outer formwork K2 formed by arranging and connecting a plurality of formwork panels KP in a rectangular shape in a plan view outside the inner formwork K1, spaced apart by the width of the continuous foundation part NK. In FIG. 1, the outer formwork K2 on the near side is omitted in order to make the inner formwork K1 easier to see.

[0033] The entrance drop jig device 1 is configured with two short straight section jigs 10 attached to the straight sections of two opposing short sides of the inner formwork K1, two long straight section jigs 20 attached to the straight sections of two opposing long sides, and four corner section jigs 30 attached to the corner sections CA of the four corners.

[0034] Next, the configuration of the short straight section jig 10 will be described with reference to Fig. 3 to Fig. 10. Fig. 3 is a perspective view showing the short straight section jig 10, Fig. 4 is a front view, Fig. 5 is a rear view, Fig. 6 is a right side view, Fig. 7 is a plan view, and Fig. 8 is a bottom view. Fig. 9 is a front perspective view showing the short straight section jig 10 attached to the inner formwork K1, and Fig. 10 is a rear perspective view. The left side view is omitted because it is symmetrical to the right side view in Fig. 6.

[0035] The short straight section jig 10 is a front drop jig that is attached to the straight section of the short side of the inner formwork K1. The material of each part that constitutes the short straight section jig 10 is metal, and for example, SECC (electrolytic galvanized steel sheet) with excellent rust prevention performance is preferably used.

[0036] More specifically, the short straight section jig 10 is configured to include a main body plate 11, a bottom plate 12, a spacing piece 13, and an attachment portion 14.

[0037] The main body plate 11 is a thin metal plate having a horizontally long rectangular shape, and is set to, for example, a length of 200 mm, a width of 500 mm, and a thickness of 2 mm.

[0038] The bottom plate 12 extends forward from the entire lower side of the main body plate 11 to a length (e.g., 20 mm) corresponding to the predetermined depth d of the entrance drop GO. The bottom plate 12 is formed by bending the lower part of the metal plate, which is the base material of the main body plate 11, forward at a right angle.

[0039] The spacing piece 13 extends forward from a position spaced above the bottom plate 12 on the front surface of the main body plate 11 by a length corresponding to the predetermined depth d of the entrance drop GO, and the front-to-rear position of the front end of the spacing piece 13 is the same as the front end of the bottom plate 12. Specifically, the spacing piece 13 is an L-shaped plate-like piece made by bending a rectangular metal plate that is elongated in the left-right direction (for example, 300 mm shorter than the main body plate 11) and fixed to the front surface of the main body plate 11 by welding.

[0040] The mounting portion 14 is a portion provided on the main body plate 11 and fixed to the upper part of the inner formwork K1, and is configured to be able to adjust the mounting height of the main body plate 11 relative to the inner formwork K1. Specifically, the mounting portion 14 is a slightly vertically long rectangular metal plate welded to the upper front part of the main body plate 11, and is provided with an elongated adjustment hole 14a that is long in the height direction.

[0041] On the other hand, a fixing device 5 is attached to the upper frame K1a of the inner formwork K1. The fixing device 5 is composed of a U-shaped metal fitting 6, a wing screw 7, an L-shaped metal fitting 8, and a wing screw 9. The U-shaped metal fitting 6 is a metal fitting having a U-shaped cross section, and is arranged on the opposite side of the concrete pouring space in a position in which the upper frame K1a of the inner formwork K1 is sandwiched between the upper side and the lower side of the U-shaped metal fitting. The L-shaped metal fitting 8 is a metal fitting having an L-shaped cross section, and is arranged in a position in which the horizontal side of the L shape is sandwiched between the upper side of the U-shaped metal fitting 6 and the upper surface of the upper frame K1a of the inner formwork K1, and the vertical side is erected above the concrete pouring space. Furthermore, the L-shaped metal fitting 8 is fixed by screwing the wing screw 7 into the female screw hole of the lower side of the U-shaped metal fitting 6 from below and pressing the horizontal side against the upper frame K1a.

[0042] With the fixing device 5 attached to the upper frame K1a of the inner formwork K1 in this manner, the mounting portion 14 is positioned at the desired height by inserting a wing screw 9 as a fastening device into the adjustment hole 14a and screwing it into the female threaded hole 8a of the vertical side of the L-shaped bracket 8 to fasten it, thereby fixing the short straight section jig 10 to the inner formwork K1.

[0043] Next, the configuration of the long straight section jig 20 will be described with reference to Fig. 11. Fig. 11 is a perspective view showing the long straight section jig 20. The long straight section jig 20 is a front drop jig that is attached to the straight section of the long side of the inner formwork K1. The materials of each part that constitutes the long straight section jig 20 are made of the same metal as the short straight section jig 10.

[0044] More specifically, the long straight portion jig 20 is configured to include a main body plate 21, a bottom plate 22, a spacing retaining piece 23, and an attachment portion 24.

[0045] The main body plate 21 is a thin rectangular metal plate that is even longer than the main body plate 11 of the short straight section jig 10, and is set, for example, to 200 mm long x 1000 mm wide x 2 mm thick. The bottom plate 22 and the spacing retaining pieces 23 have the same configuration as the bottom plate 12 and the spacing retaining pieces 13 of the short straight section jig 10, respectively, except that their size and arrangement are set according to the length of the main body plate 21.

[0046] The mounting portion 24 is similar to the mounting portion 14 of the short straight portion jig 10. However, the difference is that while the short straight portion jig 10 has mounting portion 14 provided at only one location in the longitudinal center of the upper part of the main body plate 11, the long straight portion jig 20 has mounting portions 24 provided at two locations, one on the left and one on the right, in the longitudinal direction, of the upper part of the main body plate 21.

[0047] The long straight portion jig 20 is fixed to the inner mold K1 via two mounting portions 24 in a state in which the fixing devices 5 are attached to two locations of the upper frame K1a of the inner mold K1.

[0048] Next, the configuration of the corner portion jig 30 will be described with reference to Figs. 12 to 18. Fig. 12 is a perspective view of the corner portion jig 30, Fig. 13 is a front view, Fig. 14 is a rear view, Fig. 15 is a right side view, Fig. 16 is a left side view, Fig. 17 is a plan view, and Fig. 18 is a bottom view. The corner portion jig 30 is a doorway drop jig that is attached to the four corners CA of the inner formwork K1. The materials of the various parts that make up the corner portion jig 30 are made of the same metal as the short straight portion jig 10 and the long straight portion jig 20.

[0049] More specifically, the corner jig 30 is configured by two main body plates 31 that are integrated together to form an L-shape when viewed from above, and each main body plate 31 is provided with a bottom plate 32, a spacing retaining piece 33, and an attachment portion 34, with the inside of the L-shape when viewed from above as the front face.

[0050] The main body plate 31 is a thin square metal plate, and is set, for example, to 200 mm long x 200 mm wide x 2 mm thick. The bottom plate 32, spacing pieces 33 and mounting parts 34 have the same configurations as the bottom plate 12, spacing pieces 13 and mounting parts 14 of the short straight section jig 10, except that their sizes and arrangements are set according to the length of the main body plate 31.

[0051] As shown in FIG. 1, the corner jig 30 is fixed to the inner formwork K1 via two mounting portions 34, with the fixing device 5 attached to two locations on the upper frame K1a at the corner portion CA of the inner formwork K1.

[0052] Next, a method for adjusting the mounting height of the short straight section jig 10 will be described with reference to Figures 19 and 20. Figure 19 is a cross-sectional view showing the short straight section jig 10 attached to the inner formwork K1 at a position close to the upper limit and concrete C poured, and Figure 20 is a cross-sectional view showing the short straight section jig 10 attached to the inner formwork K1 at a position close to the lower limit and concrete C poured.

[0053] As shown in Figures 19 and 20, at the foundation concrete construction site, an inner formwork K1 and an outer formwork K2 are arranged opposite each other with a gap between them, and a concrete pouring space to form the slab foundation section NK is partitioned, and a reinforcing bar T is erected in the center of the space.

[0054] Here, when the top height of the concrete C is set at a relatively high position, the mounting part 14 is slid upward to tighten the thumbscrew 9 to the L-shaped metal fitting 8, and the short straight section jig 10 is fixed to the inner formwork K1 at a position near the upper limit, as shown in Figure 19. This makes it possible to appropriately adjust the mounting height of the main board 11 and form the desired entrance drop GO in the continuous footing part NK, even when the top height of the concrete C is set at a relatively high position.

[0055] On the other hand, when the top height of the concrete C is set at a relatively low position, the mounting part 14 is slid downward to tighten the thumbscrew 9 against the L-shaped metal fitting 8, and the short straight section jig 10 is fixed to the inner formwork K1 at a position near the lower limit, as shown in Figure 20. This makes it possible to appropriately adjust the mounting height of the main board 11 and form the desired entrance drop GO in the continuous footing part NK, even when the top height of the concrete C is set at a relatively low position.

[0056] Furthermore, the method for adjusting the mounting height of the long straight section jig 20 and the corner section jig 30 is similar to the method for adjusting the mounting height of the short straight section jig 10 described above, so the explanation thereof will be omitted.

[0057] As is clear from the above detailed description, the short straight section jig 10 (long straight section jig 20, corner section jig 30) as a formwork jig in this embodiment is a jig that is attached to the foundation formwork K to form an entrance drop GO, which is a band-shaped cut-out portion of a predetermined depth in the upper part of the side of the slab section NK in the foundation concrete of a house, and is equipped with a rectangular main body plate 11 (21, 31), a bottom plate 12 (22, 32) extending forward from the entire lower edge of the main body plate 11 (21, 31) by a length corresponding to the predetermined depth d, a spacing retaining piece 13 (23, 33) extending forward from a position spaced above the bottom plate 12 (22, 32) on the front side of the main body plate 11 (21, 31) by a length corresponding to the predetermined depth, and an attachment portion 14 (24, 34) that is provided on the main body plate 11 (21, 31) and fixed to the upper part of the inner formwork K1 in the foundation formwork K.

[0058] According to this configuration, when the short straight section jig 10 (long straight section jig 20, corner section jig 30) is fixed to the upper part of the inner formwork K1 via the mounting parts 14 (24, 34), the bottom plate 12 (22, 32) and the front ends of the spacing pieces 13 (23, 33) abut against the side of the inner formwork K1, the spacing between the side of the inner formwork K1 and the main plate 11 (21, 31) is kept at a predetermined depth d, and a space of a predetermined depth is formed surrounded by the bottom plate 12 (22, 32) and the rectangular main plate 11 (21, 31). Therefore, by pouring concrete to a predetermined height in a state where the entrance drop jig device 1 composed of the short straight section jig 10, the long straight section jig 20, and the corner section jig 30 is attached to the foundation formwork K, an entrance drop GO can be formed as a band-shaped cut-out part of a predetermined depth in the upper part of the side of the slab section NK. Furthermore, when the foundation formwork K is dismantled, no waste or fragments are generated as with conventional polystyrene foam boards, and after use of the foundation formwork K is completed, it can be attached to another foundation formwork K for use. This provides the effect that not only can cut portions be easily and reliably formed in the slab portion of the concrete foundation of a house, but also that it can be used repeatedly without soiling the surrounding area.

[0059] In addition, the mounting portions 14 (24, 34) are configured so that the mounting height of the main body plate 11 (21, 31) relative to the foundation formwork K can be adjusted.

[0060] According to this configuration, by adjusting the mounting height of the main board 11 (21, 31) relative to the inner formwork K1 via the mounting portion 14 (24, 34), the entrance drop GO can be formed at various height positions of the continuous foundation portion NK.

[0061] In particular, the mounting portion 14 (24, 34) is provided in a plate-like shape extending upward from the main body plate 11 (21, 31) and is provided with an adjustment hole 14a (24a, 34a) having a long hole shape that is long in the vertical direction. The mounting portion 14 (24, 34) is positioned at any height and fixed to the inner formwork K1 by a wing screw 9 as a fastener inserted into the adjustment hole 14a (24a, 34a).

[0062] According to this configuration, the mounting height of the main body plate 11 (21, 31) can be easily and freely adjusted by changing the fastening position of the thumbscrew 9 serving as a fastener in the adjustment hole 14a (24a, 34a).

[0063] The spacing pieces 13 (23, 33) are plate-like pieces arranged parallel to and spaced apart from the bottom plate 12 (22, 32) above the bottom plate 12 (22, 32).

[0064] According to this configuration, the front end of the bottom plate 12 (22, 32) and the front end of the spacing retaining piece 13 (23, 33) abut against the side of the inner formwork K1 at a distance from each other in the vertical direction, so that the entire main body plate 11 (21, 31) can be positioned parallel to the side of the inner formwork K1 at a distance corresponding to the specified depth d without being inclined relative to the side of the inner formwork K1.

[0065] The short straight section jig 10 (long straight section jig 20) is a straight section entrance drop jig that is provided with one main body plate 11 (21) and is attached to the straight section of the inner formwork K1.

[0066] According to this configuration, by attaching a jig 10 for a short straight section (jig 20 for a long straight section) to the straight section of the inner formwork K1, a entrance drop GO can be formed in a band-shaped cutout of a predetermined depth d at the upper part of the side of the straight section of the slab foundation section NK.

[0067] In addition, the corner jig 30 is formed by integrating two main body plates 31 into an L-shape when viewed from above, and the bottom plate 32, spacing retaining piece 33, and mounting portion 34 are provided on each main body plate 31, respectively, and are a corner entrance drop jig that is attached to the corner portion CA of the inner formwork K1.

[0068] According to this configuration, by attaching the corner jig 30 to the corner portion CA of the inner formwork K1, a entrance drop GO can be formed in a band-shaped cutout of a predetermined depth d at the upper part of the side of the corner portion of the slab foundation portion NK.

[0069] In particular, the main body plate 31 has a bottom plate 32 and a spacing retaining piece 33 extending from the inner surface of the L-shape in plan view as the front surface.

[0070] With this configuration, an entrance drop-off GO can be formed in the upper part of the side of the corner portion that convex outward in the slab foundation portion NK, which is cut out in a strip shape with a predetermined depth d.

[0071] Further, the entrance drop jig device 1 as a formwork jig device is constituted by combining a plurality of short straight section jigs 10, long straight section jigs 20 and corner section jigs 30.

[0072] According to this configuration, the entrance drop jig device 1, which is composed of a combination of multiple short straight section jigs 10, long straight section jigs 20, and corner section jigs 30 as formwork jigs, can be attached to the inner formwork K1 of foundation formwork K of various shapes and sizes, thereby achieving the effect of easily and reliably forming entrance drops GO in slab sections NK of various shapes and sizes in the foundation concrete of a house, and of being able to be used repeatedly without soiling the surrounding area.

[0073] <First Modification> Next, the configuration of the entrance drop jig device 101 and the corner jig 130 according to the first modified example will be described with reference to Figs. 21 to 28. Fig. 21 is a plan view showing the overall configuration of a foundation formwork K to which the entrance drop jig device 101 according to this modified example is attached. Fig. 22 is a perspective view showing the corner jig 130 according to this modified example, Fig. 23 is a front view, Fig. 24 is a rear view, Fig. 25 is a right side view, Fig. 26 is a left side view, Fig. 27 is a plan view, and Fig. 28 is a bottom view.

[0074] The foundation formwork K according to this modification is formed in an L-shape in plan view, and the inner formwork K1 has five corners CA that are convex outward and one corner CB that is convex inward. As in the above embodiment, a short straight portion jig 10 and a long straight portion jig 20 are attached to each straight portion of the inner formwork K1. Also, as in the above embodiment, a corner portion jig 30 is attached to the corner portion CA, in which a bottom plate 32 and a spacing piece 33 are extended from a main body plate 31 with the inside of the L-shape in plan view as the front face.

[0075] On the other hand, a corner jig 130 for the corner portion CB according to a modified example is attached to the corner portion CB of the inner formwork K1. As shown in Fig. 22 to Fig. 28, the corner jig 130 has a main body plate 31 with the outer side of the L-shape in plan view as the front face, and a bottom plate 32 and a spacing retaining piece 33 are extended from the main body plate 31.

[0076] With this configuration, an entrance drop GO can be formed in the upper part of the side of the corner portion that convex inward in the slab foundation portion NK, which is cut out in a strip shape with a predetermined depth d.

[0077] <Second Modification> Next, the configurations of the short straight section jig 210, the long straight section jig 220, and the corner section jig 230 according to the second modified example will be described with reference to the drawings. In the above embodiment, the short straight section jig 10, the long straight section jig 20, and the corner section jig 30 are configured so that the mounting heights of the main plates 11, 21, and 31 relative to the formwork can be adjusted, but this modified example has a simple structure in which the mounting heights are fixed.

[0078] First, the configuration of the short straight section jig 210 will be described with reference to Fig. 29 to Fig. 35. Fig. 29 is a perspective view showing the short straight section jig 210, Fig. 30 is a front view, Fig. 31 is a rear view, Fig. 32 is a right side view, Fig. 33 is a plan view, and Fig. 34 is a bottom view. Fig. 35 is a cross-sectional view showing the short straight section jig 210 attached to the inner formwork K1 and concrete C poured. The left side view is omitted because it is symmetrical to the right side view in Fig. 32.

[0079] The short straight section jig 210, like the short straight section jig 10 according to the above embodiment, is made of a metal such as SECC, and is configured to include a main body plate 11, a bottom plate 12, a spacing piece 13, and an attachment portion 14. The main body plate 11, the bottom plate 12, and the spacing piece 13 are the same as those in the above embodiment, so a description thereof will be omitted.

[0080] The mounting portion 14 is a plate-like portion that extends forward from the upper end of the main body plate 11 and is fixed to the inner formwork K1. Specifically, the mounting portion 14 is a vertically long rectangular metal plate that has been bent into an L shape, and is fixed to the front surface of the main body plate 11 near the upper end by welding.

[0081] On the other hand, a fixing device 5 is attached to the upper frame K1a of the inner formwork K1 as shown in Fig. 35. The fixing device 5 is composed of a U-shaped metal fitting 6 and a wing screw 7. The U-shaped metal fitting 6 is a metal fitting having a U-shaped cross section, and is arranged on the opposite side of the concrete pouring space in a position in which the upper frame K1a of the inner formwork K1 is sandwiched between the upper side and the lower side of the U-shape. The short straight section jig 210 is fixed to the inner formwork K1 by sandwiching the horizontal extension part of the mounting part 14 between the upper side of the U-shaped metal fitting 6 and the upper surface of the upper frame K1a of the inner formwork K1.

[0082] Next, the configuration of the long straight section jig 20 will be described with reference to Fig. 36. Fig. 36 is a perspective view showing a long straight section jig 220. Like the long straight section jig 20 according to the above embodiment, the long straight section jig 220 is made of a metal such as SECC, and is configured to include a main body plate 21, a bottom plate 22, a spacing piece 23, and an attachment portion 24. The main body plate 21, the bottom plate 22, and the spacing piece 23 are the same as in the above embodiment, so a description thereof will be omitted.

[0083] The mounting portion 24 is a portion that extends forward from the upper end of the main body plate 21 in a plate-like shape and is fixed to the inner formwork K1. Specifically, the mounting portion 24 is a vertically long rectangular metal plate that has been bent into an L shape, and is fixed by welding to the front surface near the upper end of the main body plate 21. As with the mounting portion 14 of the short straight portion jig 210, the horizontally extended portion of the mounting portion 24 is sandwiched between the upper side of the U-shaped metal fitting 6 and the upper surface of the upper frame K1a of the inner formwork K1, thereby fixing the long straight portion jig 220 to the inner formwork K1.

[0084] Next, the configuration of the corner jig 230 will be described with reference to Figs. 37 to 43. Fig. 37 is a perspective view of the corner jig 230, Fig. 38 is a front view, Fig. 39 is a rear view, Fig. 40 is a right side view, Fig. 41 is a left side view, Fig. 42 is a plan view, and Fig. 43 is a bottom view. The corner jig 230 is made of metal such as SECC, similar to the corner jig 30 according to the above embodiment, and is configured by two main body plates 31 integrated into an L-shape in plan view, and each main body plate 31 is provided with a bottom plate 32, a spacing piece 33, and an attachment portion 34 with the inside of the L-shape in plan view as the front face. The main body plate 31, the bottom plate 32, and the spacing piece 33 are similar to the corner jig 30 according to the above embodiment, so their description will be omitted.

[0085] The mounting portion 34 is a portion that extends forward from the upper end of the main body plate 31 in a plate-like shape and is fixed to the inner formwork K1. Specifically, the mounting portion 34 is a vertically long rectangular metal plate that has been bent into an L shape, and is fixed by welding to the front surface near the upper end of the main body plate 31. As with the mounting portion 14 of the short straight portion jig 210, the horizontal extension of the mounting portion 34 is sandwiched between the upper side of the U-shaped metal fitting 6 and the upper surface of the upper frame K1a of the inner formwork K1, thereby fixing the corner portion jig 230 to the inner formwork K1.

[0086] As is clear from the above detailed description, in the short straight section jig 210 (long straight section jig 220 and corner section jig 230) of this modified example, the mounting portion 14 (24, 34) extends forward in a plate-like manner from the upper end of the main body plate 11 (21, 31) and is fixed to the inner formwork K1.

[0087] With this configuration, the short straight section jig 210 (the long straight section jig 220 and the corner section jig 230) can be securely fixed to the upper part of the inner formwork K1 via the mounting portion 14 (24, 34) having an extremely simple structure.

[0088] <Other Modifications> The present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the configuration of the fixing device 5 is not limited to the configuration of the above-mentioned embodiment, and any configuration may be used as long as the mounting portion 14 and the like can be fixed to the upper part of the inner formwork K1. In addition, the spacing retaining pieces 13 (23, 33) are configured as plate-like pieces arranged in parallel with a gap above the bottom plate 12 (22, 32), but are not limited to this, and can be implemented by changing the arrangement and shape as long as they are extended forward from a position spaced above the bottom plate 12 (22, 32) on the front surface of the main plate 11 (21, 31) to a length corresponding to the predetermined depth d. In addition, the configuration of the mounting portions 14 (24, 34) is not limited to those shown in the above-mentioned embodiment and each modified example, and may be any configuration that is provided on the main plate 11 (21, 31) and fixed to the upper part of the inner formwork K1. Furthermore, the dimensions and shapes of the short straight section jig 10, 210, the long straight section jig 20, 220, and the corner section jig 30, 130, 230 are not limited to those shown in the above embodiment and each modified example, and can be modified as appropriate. Furthermore, the formwork jigs (short straight section jig 10, 210, long straight section jig 20, 220, and corner section jig 30, 130, 230) according to each of the above-mentioned embodiments and modified examples can be used when forming a band-shaped cut in the upper part of a slab of foundation concrete formed at the back door of a house, in addition to the entrance of the house.

[0089] <Additional Notes> Each embodiment shown in the drawings of this application includes a design that may be the subject of a design registration application. Specifically, the external shapes of the short straight section jigs 10, 210, the long straight section jigs 20, 220, and the corner section jigs 30, 130, 230 can be understood as the overall design of the product names "formwork jig" or "entrance drop jig", respectively, and the external shapes of each part of each formwork jig can also be understood as partial designs of the product names "formwork jig" or "entrance drop jig". [Explanation of symbols]

[0090] 1 Entrance drop fixture device (formwork fixture device) 9 Thumb screw (fastener) 10. Jig for short straight section (embodiment, formwork jig) 11 Main Board 12 Bottom plate 13 Spacing piece 14 Mounting part 14a adjustment hole 20 Long straight section jig (embodiment, formwork jig) 21 Main Board 22 Bottom plate 23 Spacing piece 24 Mounting part 24a adjustment hole 30 Corner jig (embodiment, formwork jig) 31 Main Board 32 Bottom plate 33 Spacing piece 34 Mounting part 34a adjustment hole 130 Corner jig (first variant, formwork jig) 210 Short straight section jig (second modified example, formwork jig) 220 Long straight section jig (second modified example, formwork jig) 230 Corner jig (second variant, formwork jig)

Claims

1. A jig attached to a foundation formwork to form a strip-shaped cutout at a predetermined depth on the upper part of the side of a slab in the foundation concrete of a house, A rectangular body plate; A bottom plate extending forward from the entire lower side of the main body plate by a length corresponding to the predetermined depth; a spacing piece extending forward from a position spaced apart above the bottom plate on the front surface of the main body plate by a length corresponding to the predetermined depth; An attachment portion provided on the main body plate and fixed to an upper portion of the foundation formwork; A formwork jig comprising: The mounting portion is configured to adjust the mounting height of the main plate relative to the foundation formwork, and is a plate-like extension upward from the main plate, with a long, elongated adjustment hole in the height direction provided, and is positioned at any height by a fastener inserted into the adjustment hole and fixed to the foundation formwork, a formwork jig.

2. The formwork jig according to claim 1 , wherein the spacing pieces are plate-like pieces arranged parallel to and spaced apart above the bottom plate.

3. The formwork jig according to claim 1 or 2, wherein the formwork jig is a straight section jig provided with one of the main body plates and attached to the straight section of the foundation formwork.

4. A jig attached to a foundation formwork to form a strip-shaped cutout at a predetermined depth on the upper part of the side of a slab in the foundation concrete of a house, A rectangular body plate; A bottom plate extending forward from the entire lower side of the main body plate by a length corresponding to the predetermined depth; a spacing piece extending forward from a position spaced apart above the bottom plate on the front surface of the main body plate by a length corresponding to the predetermined depth; An attachment portion provided on the main body plate and fixed to an upper portion of the foundation formwork; A formwork jig comprising: The formwork jig is a corner jig in which the two main body plates are integrated together to form an L-shape when viewed from above, and the bottom plate, the spacing retaining piece, and the mounting portion are provided on each of the main body plates, respectively, and are attached to the corner portions of the foundation formwork.

5. The formwork jig according to claim 4 , wherein the main body plate has the bottom plate and the spacing retaining pieces extending therefrom such that the inner side of the L-shape in plan view faces toward the front side.

6. The formwork jig according to claim 4 , wherein the main body plate has the bottom plate and the spacing retaining pieces extending therefrom such that the outer side of the L-shape in plan view faces the front surface.

7. The formwork jig according to any one of claims 1 to 6, wherein the formwork jig is a entrance drop jig that is attached to the inner formwork of the foundation formwork to form an entrance drop, which is a cut-out portion provided in the slab portion of the foundation concrete at the entrance of a house.

8. A formwork jig device comprising a combination of a plurality of formwork jigs according to any one of claims 1 to 7.

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