Form holding metal fitting and method of placing concrete foundation heat insulating work using the same

Abstract

To provide a form holding metal fitting and a placing execution method of concrete foundation heat insulating work using the form holding metal fitting, capable of shortening a construction period of the concrete foundation heat insulating work, and capable of saving labor, while preventing the occurrence of a clearance between concrete and a heat insulating material.SOLUTION: The main frame 10 includes a top plate 11 having a length exceeding the length between outer side surfaces of the heat insulating materials D arranged to face each other, a pair of side plates 12 suspended from left and right end portions of the top plate 11, and a pair of locking plates 20 suspended from a lower surface of the top plate 11 to be arranged to face each of the side plates 12 at a position inside each of the pair of side plates 12. In the form holding metal fitting 1, the length in the vertical direction of the pair of side plates 12 is substantially the same as the length in the vertical direction of the heat insulating material D, and the length from each of the pair of side plates 12 to the locking plate 20 arranged opposite to each side plate 12 is substantially the same as the thickness of the heat insulating material D.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a formwork holding metal fitting used to utilize plate-shaped insulation material as a formwork when pouring concrete foundation insulation work, and a pouring construction method for concrete foundation insulation work using the formwork holding metal fitting. [Background technology]

[0002] Conventionally, concrete foundation insulation work has typically involved pouring concrete using steel or wooden formwork, then removing the steel or wooden formwork, and then using adhesive to adhere plate-shaped insulation material to the concrete. Such conventional concrete foundation insulation work is shown, for example, in Patent Document 1 below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-146804 Summary of the Invention [Problem to be solved by the invention]

[0004] The prior art shown in Patent Document 1 above is an invention relating to an externally insulated foundation structure, and has the advantage of being able to provide an externally insulated foundation structure with high thermal insulation effect by improving the accuracy of the insulating material installation work and the structure of the insulating material. However, such conventional concrete foundation insulation work has the problem that gaps tend to form between the concrete and the insulation material, which can lead to the growth of mold.

[0005] Therefore, the present invention aims to solve the problems of the above-mentioned conventional technology, prevent gaps from occurring between the concrete and the insulation material, and provide a formwork holding fitting that can shorten the construction period and reduce labor required for concrete foundation insulation work, as well as a casting construction method for concrete foundation insulation work using the formwork holding fitting. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the formwork holding fittings of the present invention are formwork holding fittings for holding opposing plate-shaped insulation materials together so that the opposing insulation materials can also be used as formwork when pouring concrete foundation insulation work, and are equipped with a main frame consisting of a top plate whose length exceeds the length between the outer sides of the opposing insulation materials, a pair of side plates hanging down from the left and right ends of the top plate, and a pair of locking plates hanging down from the underside of the top plate so as to be positioned opposite each of the pair of side plates at a position inside each of the pair of side plates, and the vertical length of the pair of side plates is approximately the same as the vertical length of the insulation material, and the length from each of the pair of side plates to the locking plate arranged opposite each side plate is approximately the same as the thickness of the insulation material. In addition to the first feature described above, the formwork holding hardware of the present invention has a second feature in that the pair of side panels are made of L-shaped members when viewed in a plane, and are provided with a cut portion at the lower end of the surface that intersects with the longitudinal direction of the insulation material, formed by cutting the side panels a predetermined length from the lower end to the upper end. In addition to the first or second characteristic, the formwork holding fittings of the present invention have a third characteristic in that the vertical length of the pair of locking plates is shorter than the vertical length of the insulation material. In addition, the formwork holding hardware of the present invention is a formwork holding hardware that integrally holds the insulation material and a steel or wooden formwork that is placed on the inside or outside of a building so as to face the insulation material, so that the insulation material can be used as a formwork when pouring concrete foundation insulation work.The formwork holding hardware is characterized by the fact that it comprises a top plate that has a length that exceeds the distance between the outer sides of the insulation material and the steel or wooden formwork, a main frame that comprises a pair of side plates that hang down from the left and right ends of the top plate, and a locking plate that hangs down from the underside of the top plate at a position inside the side plate that holds the insulation material so as to face the side plate that holds the insulation material, and the vertical length of at least the side plate that holds the insulation material is approximately the same as the vertical length of the insulation material, and the length from the side plate that holds the insulation material to the locking plate is approximately the same as the thickness of the insulation material. In addition to the fourth feature, the formwork holding metal fittings of the present invention have a side plate for holding the heat insulating material, which is formed of an L-shaped member in a plan view, and has a predetermined length from the lower end to the upper end at the lower end of the surface intersecting the longitudinal direction of the heat insulating material. A fifth feature is that the device has a cut portion formed by cutting a plate. In addition to the fourth or fifth feature, the formwork holding hardware of the present invention has a sixth feature in that the vertical length of the side panels for holding the steel or wooden formwork is shorter than the vertical length of the steel or wooden formwork. In addition to the sixth feature, the formwork holding fittings of the present invention have a seventh feature in that through holes are provided at predetermined positions on the side panels for holding the steel or wooden formwork. In addition, the eighth feature of the present invention is that the pouring and construction method for concrete foundation insulation work of the present invention is a pouring and construction method for concrete foundation insulation work using formwork holding fittings as described in claim 3, and includes arranging a plurality of plate-shaped insulation materials at predetermined positions on the base concrete, and fixing a plurality of the insulation materials that make up the corners and stop portions of the plurality of insulation materials, then arranging a plurality of formwork holding fittings at predetermined intervals so that each of the opposing insulation materials is sandwiched between a side panel and a locking plate, and then arranging side panel fixing members extending in the longitudinal direction of the opposing insulation materials at the cut portions of the side panels so that they abut against the side panels, and then pouring concrete, and then removing the formwork holding fittings from the opposing insulation materials, and then cutting the top ends of all the insulation materials so that they are flush with the top edge of the concrete. The present invention provides a concrete foundation insulation pouring and construction method using formwork retaining hardware, which comprises: arranging a plurality of plate-shaped insulation materials and a plurality of steel or wooden formworks at predetermined positions on the base concrete; fixing a plurality of the insulation materials that make up the corners and stop portions of the insulation materials; clamping each of the insulation materials between side panels and locking plates; arranging a plurality of formwork retaining hardware at predetermined intervals so that each of the steel or wooden formworks abuts against the side panels; arranging side panel fixing members extending in the longitudinal direction of the insulation materials at the cut portions of the side panels to abut against the side panels; pouring concrete; removing the formwork retaining hardware from the insulation materials and the steel or wooden formworks that are arranged opposite each other; removing the steel or wooden formwork; and cutting the tops of all the insulation materials so that they are flush with the top edge of the concrete. [Effects of the Invention]

[0007] According to the formwork holding hardware described in claim 1, the side panels and the locking plates can integrally clamp and hold the opposing insulation material. This allows for readily available plate-shaped insulation material to be used as a formwork for pouring concrete. This eliminates the need to remove the steel or wooden formwork and then use adhesive to bond the plate-shaped insulation material to the concrete, as opposed to pouring concrete using only steel or wooden formwork. In other words, the concrete and insulation material can be bonded simply by pouring the concrete. This prevents gaps from forming between the concrete and the insulation material, thereby preventing mold growth. Furthermore, this technology shortens the construction time and reduces labor required for concrete foundation insulation work.

[0008] Furthermore, according to the formwork holding hardware described in claim 2, in addition to the advantageous effects of the configuration described in claim 1, by forming a pair of side panels from members that are L-shaped in plan view, it is possible to effectively prevent the formwork holding hardware from sagging. Furthermore, by providing a cutout, the formwork holding hardware can be firmly fixed simply by arranging side panel fixing members that extend in the longitudinal direction of the opposing insulation in the cutout of the side panel so that they abut against the side panel. This allows for precise pouring of concrete.

[0009] Furthermore, according to the form holding hardware described in claim 3, in addition to the advantageous effects of the configurations described in claims 1 and 2, by making the vertical length of the pair of locking plates shorter than the vertical length of the insulation material, the form holding hardware can be made lighter and easier to set on the insulation material, making it highly convenient and further realizing shorter construction times and labor savings for concrete foundation insulation work.

[0010] Furthermore, the formwork holding hardware described in claim 4 can clamp and hold the insulating material and the steel or wooden formwork together. This allows for the use of readily available plate-shaped insulating material as a formwork during concrete pouring. This eliminates the need for the process of removing the steel or wooden formwork and then bonding the plate-shaped insulating material to the concrete using adhesive, as opposed to pouring concrete using only steel or wooden formwork. In other words, the concrete and insulating material can be bonded simply by pouring the concrete. This prevents gaps from forming between the concrete and the insulating material, thereby preventing mold growth. Furthermore, this technology shortens the construction time and reduces labor required for concrete foundation insulation work.

[0011] Furthermore, according to the formwork holding hardware described in claim 5, in addition to the advantageous effects of the configuration described in claim 4, by forming the side panels for holding the insulation with members that are L-shaped in plan view, it is possible to effectively prevent the formwork holding hardware from sagging. Also, by providing a cutout, the formwork holding hardware can be firmly fixed simply by arranging the side panel fixing members that extend in the longitudinal direction of the insulation in the cutout of the side panel so that they abut against the side panel. This allows for precise pouring of concrete.

[0012] Furthermore, according to the formwork holding hardware described in claim 6, in addition to the advantageous effects of the configurations described in claims 4 and 5, by making the vertical length of the side panels for holding the steel or wooden formwork shorter than the vertical length of the steel or wooden formwork, it is possible to reduce the weight of the formwork holding hardware and to make it easier to set onto the steel or wooden formwork. This makes it highly convenient and further reduces the construction period and labor required for concrete foundation insulation work.

[0013] Furthermore, according to the formwork holding hardware described in claim 7, in addition to the advantageous effects of the configuration described in claim 6, by providing through holes at predetermined positions on the side panels for holding the steel or wooden formwork, by inserting a rod-shaped member with a certain strength, such as a nail, into the through hole, the rod-shaped member becomes caught on the steel or wooden formwork, preventing the formwork holding hardware from floating up during concrete pouring, thereby enabling more accurate concrete pouring.

[0014] Furthermore, according to the concrete foundation insulation construction method described in claim 8, it is possible to use readily available plate-shaped insulation materials as formwork when pouring concrete. Therefore, compared to pouring concrete using only steel or wooden formwork, the process of removing the steel or wooden formwork and then bonding the plate-shaped insulation material to the concrete with adhesive is unnecessary. In other words, the concrete and the insulation material can be bonded simply by pouring the concrete. Therefore, gaps between the concrete and the insulation material can be prevented, resulting in a pouring construction method that can prevent mold growth. Furthermore, it is possible to shorten the construction period and reduce labor required for concrete foundation insulation construction.

[0015] Furthermore, according to the concrete foundation insulation construction method described in claim 9, it is possible to use readily available plate-shaped insulation materials as formwork for pouring concrete. Therefore, compared to pouring concrete using only steel or wooden formwork, the process of removing the steel or wooden formwork and then bonding the plate-shaped insulation material to the concrete with adhesive is unnecessary. In other words, the concrete and the insulation material can be bonded simply by pouring the concrete. Therefore, it is possible to prevent gaps from forming between the concrete and the insulation material, thereby providing a pouring construction method that can prevent mold growth. Furthermore, it is possible to shorten the construction period and reduce labor required for concrete foundation insulation construction. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view showing the state after concrete has been poured using the form holding fitting according to the first embodiment of the present invention. [Figure 2] 1A, 1B, and 1C are diagrams showing a form holding metal fitting according to a first embodiment of the present invention, in which (a) is a front view, (b) is a bottom view, and (c) is a plan view. [Figure 3] FIG. 1 is a right side view of a formwork holding metal fitting according to a first embodiment of the present invention. [Figure 4] 1 is a cross-sectional view of a main part showing a process of pouring concrete using a form holding fitting according to a first embodiment of the present invention. FIG. [Figure 5] 1 is a cross-sectional view of a main part showing a process of pouring concrete using a form holding fitting according to a first embodiment of the present invention. FIG. [Figure 6] 1 is a cross-sectional view of a main part showing a process of pouring concrete using a form holding fitting according to a first embodiment of the present invention. FIG. [Figure 7] 5A, 5B, and 5C are diagrams showing a form holding metal fitting according to a second embodiment of the present invention, in which (a) is a front view, (b) is a bottom view, and (c) is a plan view. [Figure 8] 10A and 10B are left and right side views of a formwork holding metal fitting according to a second embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view of the main part showing the process of pouring concrete using a form holding fitting according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, a formwork holding hardware and a concrete foundation insulation construction method using the formwork holding hardware according to a first embodiment of the present invention will be described with reference to the drawings to help understand the present invention. However, the following description does not limit the present invention as defined in the claims.

[0018] First, a form holding fitting 1 according to a first embodiment of the present invention will be described with reference to FIGS.

[0019] Referring to Figure 1, the formwork holding fittings 1 of the first embodiment of the present invention are intended to be used when pouring concrete for concrete foundation insulation work, which is carried out to place concrete 4, anchor bolts 5, and insulation material D in predetermined positions on base concrete 3, so that the insulation material D placed opposite can also be used as formwork. As shown in FIG. 2, this form holding metal fitting 1 is made up of a main frame 10 and a pair of locking plates 20.

[0020] The main frame 10 constitutes the framework of the form holding metal fitting 1. As shown in FIGS. 2 and 3, the main frame 10 is composed of a top plate 11 and a pair of side plates 12.

[0021] The top plate 11 is a member that connects the pair of side plates 12 and on which the locking plate 20 is disposed. In this embodiment, the top plate 11 is a long, thin flat plate made of iron. The horizontal (left-right) length of the top plate 11 in Figure 2 can be changed as appropriate to suit the thickness of the insulating material D used and the length between the insulating materials D arranged opposite each other, but it is necessary that the length at least exceeds the length between the outer side surfaces of the insulating materials D arranged opposite each other. The width (length in the vertical direction (up and down direction)) of the top board 11 in FIG. 2 can also be changed as appropriate, but is preferably set to about 2.5 cm. Furthermore, the thickness of the top plate 11 can also be changed as appropriate, but is preferably set to about 2 mm to 3 mm. The material of the top plate 11 is not limited to iron, and other materials may be used as long as they have a certain level of strength. However, in consideration of strength and durability, it is preferable to use iron.

[0022] The side plates 12 are members for sandwiching and holding the heat insulating material D together with the locking plates 20 . In this embodiment, a pair of side plates 12 are provided by hanging long, thin iron flat plates from the left and right ends of the top plate 11. The vertical length of the side plates 12 in Figures 2(a) and 3 is approximately the same as the vertical length of the heat insulating material D.

[0023] 2(b) and 3, this embodiment uses side plates 12 that are L-shaped in plan view, formed by bending a single, elongated iron plate at a right angle. More specifically, side plates 12 include first side plate 12a and second side plate 12b that are bent in an L-shape in plan view. The method for forming the side panel 12 that is L-shaped in plan view is not limited to the configuration of this embodiment, and other methods may be used, such as welding two elongated flat iron plates into an L shape or molding them together using a formwork. 2(b), in this embodiment, the position of the L-shaped intersection of the side panels 12, which are L-shaped in plan view, is not positioned at the left and right ends of the top panel 11, but is positioned inward (closer to the locking plate 20) from the left and right ends of the top panel 11. In other words, when the form holding fitting 1 is in use, the first side panel 12a is in surface contact with the heat insulating material D. 2(b), the L-shaped portion of the side panel 12 hanging down from the left end of the table top 11 is rotated 180 degrees between the L-shaped portion of the side panel 12 hanging down from the right end of the table top 11. Of course, the configuration is not limited to this, and the orientation of the L-shaped portion of the L-shaped portion of the side panel 12 hanging down from the left end of the table top 11 and the orientation of the L-shaped portion of the L-shaped portion of the side panel 12 hanging down from the right end of the table top 11 can be changed as appropriate.

[0024] In this embodiment, as shown in Fig. 2(b), the length and thickness of the first side plate 12a are the same as the width (the length in the vertical direction (up and down direction) of the top plate 11 in Fig. 2(b)) and thickness of the top plate 11. Furthermore, the length and thickness of the second side plate 12b are the same as the length and thickness of the first side plate 1a.

[0025] 2(a) and 3, the side panel 12 includes a cut portion S at the lower end of the second side panel 12b, which is a plane intersecting the longitudinal direction of the thermal insulating material D (the direction indicated by the black arrow in FIG. 2(b)). The cut portion S is formed by cutting the second side panel 12b a predetermined length from the lower end to the upper end. More specifically, in this embodiment, the cut portion S is formed by cutting the second side panel 12b from the lower end to the upper end of the second side panel 12b into a rectangular shape with a length (the length in the vertical direction (up-down direction) of the second side panel 12b shown in FIG. 2(a)) of approximately 3.5 cm and a width (the length in the horizontal direction (left-right direction) of the second side panel 12b shown in FIG. 2(a)) of approximately 2 cm. Of course, the shape and size of the cut portion S are not limited to those of this embodiment and can be changed as appropriate to match the shape and size of the side panel fixing member 30.

[0026] The material of the side plates 12 is not limited to iron, and other materials may be used as long as they have a certain level of strength. However, in consideration of strength and durability, it is preferable to use iron. In this embodiment, the side plate 12 having such a configuration is fixed to the top plate 11 by welding.

[0027] The locking plate 20 is a member for sandwiching and holding the heat insulating material D together with the side plate 12 . In this embodiment, a pair of locking plates 20 are provided by hanging flat iron plates from the underside of the top plate 11 so that they are positioned opposite each of the side plates 12, at a position inside each of the pair of side plates 12. In this embodiment, the length P from each of the pair of side plates 12 shown in FIG. 2(b) to the locking plate 20 arranged opposite each side plate 12 is set to be substantially the same length as the thickness of the heat insulating material D. Furthermore, the vertical length of the pair of locking plates 20 is shorter than the vertical length of the heat insulating material D. Specifically, the vertical length of the pair of locking plates 20 is configured to be approximately 1.5 cm to 3 cm. In addition, in this embodiment, as shown in Figure 2(b), the length and thickness of the locking plate 20 are the same as the width and thickness of the top plate 11 (the vertical (up-down) length of the top plate 11 in Figure 2(b)). In this embodiment, the locking plate 20 having such a configuration is fixed to the top plate 11 by welding.

[0028] Next, a method of pouring concrete foundation insulation work using the form holding metal fitting 1 according to the first embodiment of the present invention configured as described above will be described with reference to FIGS.

[0029] First, referring to Fig. 4(a), a plurality of plate-shaped insulating materials D are placed at predetermined positions on the base concrete 3. At this time, among the plurality of insulating materials D, a plurality of insulating materials D that form the corners and stop portions are adhered with adhesive, and then temporarily fixed with nails until the adhesive hardens so that the adhesive does not open (after the temporary fixation, the insulating materials are fixed with the nails still in place). In this embodiment, Styrofoam (registered trademark) having a thickness of 5 cm and a height of 45 cm is used as the heat insulating material D. Of course, the thickness and size of the heat insulating material D are not limited to those in this embodiment and can be changed as appropriate. 4(b), a plurality of formwork holding fittings 1 are then arranged at predetermined intervals so that each of the opposing insulating materials D is sandwiched between the side panels 12 and the locking plates 20. Note that the interval between adjacent formwork holding fittings 1 is preferably within 60 cm.

[0030] 5(a) and 5(b), side panel fixing members 30 extending in the longitudinal direction of the opposing heat insulating materials D are disposed in the cut portions S of the side panels 12 so as to abut against the side panels 12 (first side panel 12a and second side panel 12b), and then concrete 4 is poured. At this time, the concrete is poured to a predetermined height. In this embodiment, a long, thin piece of rectangular timber is used as the side panel fixing member 30. Of course, the side panel fixing member 30 is not limited to a piece of rectangular timber, and other materials may be used as long as they have a certain degree of strength and weight and can firmly fix the side panel 12.

[0031] Then, referring to Figures 6(a) and 6(b), the formwork holding fittings 1 are removed from the opposing insulation materials D, and then the upper ends of all of the insulation materials D are cut so that they are flush with the top edge 4a of the concrete 4. This completes the pouring of concrete in concrete foundation insulation work using the form holding metal fitting 1 according to the first embodiment of the present invention.

[0032] The form holding fitting 1 and the concrete foundation insulation construction method using the form holding fitting 1 according to the first embodiment of the present invention configured as described above have the following advantages.

[0033] The formwork holding hardware 1 includes a pair of side plates 12 and locking plates 20 arranged opposite each of the pair of side plates 12, allowing the opposing insulating material D to be clamped and held together. This allows for the use of readily available plate-shaped insulating material D (Styrofoam® in this embodiment) as a formwork for pouring concrete. This eliminates the need for the process of removing the steel or wooden formwork and then bonding the plate-shaped insulating material D to the concrete 4 using adhesive, as opposed to pouring concrete 4 using only steel or wooden formwork. In other words, simply pouring the concrete 4 allows the concrete 4 and the insulating material D to be bonded together. This prevents gaps from forming between the concrete 4 and the insulating material D, thereby preventing mold growth. Furthermore, this also reduces the construction time and labor required for concrete foundation insulation work.

[0034] Furthermore, forming the pair of side panels 12 from members that are L-shaped in plan view effectively prevents the formwork holding hardware 1 from warping. Furthermore, by providing the cutouts S, the formwork holding hardware 1 can be firmly fixed simply by arranging the side panel fixing members 30, which extend in the longitudinal direction of the opposing insulating material D, in the cutouts S of the side panels 12 so that they abut against the side panels 12. This allows the concrete 4 to be poured with precision.

[0035] Furthermore, by making the vertical length of the pair of locking plates 20 shorter than the vertical length of the insulating material D, it is possible to reduce the weight of the formwork holding fittings 1 and make the formwork holding fittings 1 easier to set on the insulating material D. This makes it highly convenient and further reduces the construction period and labor required for concrete foundation insulation work.

[0036] Furthermore, according to the concrete foundation insulation construction method of the present invention, it is possible to use readily available plate-shaped insulation material (in this embodiment, Styrofoam (registered trademark)) as a formwork for pouring concrete. Therefore, compared to pouring concrete 4 using only steel or wooden formwork, the process of removing the steel or wooden formwork and then bonding the plate-shaped insulation material D to the concrete 4 with an adhesive is unnecessary. In other words, the concrete 4 and the insulation material D can be bonded together simply by pouring the concrete 4. This prevents gaps from forming between the concrete 4 and the insulation material D, thereby enabling a pouring construction method that can prevent mold growth. Furthermore, it is possible to shorten the construction period and reduce labor required for concrete foundation insulation construction.

[0037] Next, a form holding fitting 2 according to a second embodiment of the present invention and a method of pouring concrete foundation insulation work using the form holding fitting 2 will be described with reference to FIGS. 7, a formwork holding fitting 2 according to a second embodiment of the present invention is configured such that, compared to the formwork holding fitting 1 according to the first embodiment of the present invention described above, the configuration of the side plate disposed on the right side in a front view of one of a pair of side plates is changed, and the locking plate disposed on the right side in a front view of one of a pair of locking plates is removed. As the other configurations are the same as those of the formwork holding fitting 1 according to the first embodiment of the present invention described above, the same members and parts that perform the same functions are given the same numbers and symbols, and only the different configurations will be described below. Furthermore, the pouring method for concrete foundation insulation work using formwork holding fittings 2 according to the second embodiment of the present invention is different from the pouring method for concrete foundation insulation work using formwork holding fittings 1 according to the first embodiment of the present invention described above in that the configuration of the object held integrally by formwork holding fittings 2 is changed. As the other configurations are the same as the pouring method for concrete foundation insulation work using formwork holding fittings 1 according to the first embodiment of the present invention described above, a description of the same steps will be omitted and only the different configurations will be described below.

[0038] First, referring to Figures 7 and 8, the formwork holding fittings 2 relating to the second embodiment of the present invention are intended to be used to enable plate-shaped insulation material D arranged inside or outside a building to also be used as formwork. Specifically, in this embodiment, the formwork holding fittings are used to integrally hold together the insulating material D and a steel formwork K that is arranged on the inside or outside of a building so as to face the insulating material D, so that the insulating material D can also be used as a formwork.

[0039] 7 and 8, the form holding fitting 2 has a pair of side plates, a side plate 40 on the right side in a front view, for holding the steel form K. In this embodiment, the vertical length of the side plate 40 for holding the steel form K is shorter than the vertical length of the steel form K. More specifically, the vertical length of the side plate 40 is about 2 cm. The side plate 40 is made of the same material, shape, and thickness as the locking plate 20. Of course, the configuration is not limited to this, and the side plate 40 may have a different configuration from the locking plate 20. 8, a through hole 40a is provided at a predetermined position on the side plate 40 for holding the steel formwork K. Specifically, a circular through hole with a diameter of about 5 mm is provided in the center of the side plate 40 in the horizontal direction (left-right direction) and slightly below in the vertical direction (up-down direction) as shown in FIG.

[0040] Next, a method of pouring concrete foundation insulation work using formwork holding metal fittings 2 will be described with reference to FIG. First, referring to FIG. 9(a), a plurality of plate-shaped insulating materials D and a plurality of steel formwork K are placed in predetermined positions on the base concrete 3. At this time, among the plurality of insulating materials D, a plurality of insulating materials D that form the corners and stop portions are adhered with adhesive, and then temporarily fixed with nails until the adhesive hardens so that the adhesive does not open (after the temporary fixation, the nails are left in place to fix the materials). In addition, a plurality of formwork support materials (not shown) that support the plurality of steel formwork K are attached to the plurality of steel formwork K. It is preferable to use a steel formwork K having a thickness of about 4.5 cm to 6 cm and a height of about 75 cm. Of course, the steel formwork K is not limited to this configuration, and the thickness and height of the steel formwork K can be changed as appropriate.

[0041] 9(b), for the insulating material D and the steel formwork K that are arranged opposite each other, a plurality of formwork holding fittings 2 are arranged at predetermined intervals so that the insulating material D is sandwiched between the side plate 12 and the locking plate 20, and so that the steel formwork K abuts against the side plate 40. Note that the interval between adjacent formwork holding fittings 2 should desirably be within 60 cm. At this time, as shown in part in Figure 8, it is necessary to insert a nail from the outside to the inside of the through-hole 40a of the side panel 40, and insert the nail into a recess K2 on the back side of the steel formwork K at a position below the thickness of the upper panel K1 of the steel formwork K, as shown by the dashed line in Figure 8. Note that the member to be inserted into the through-hole 40a is not limited to a nail, and any rod-shaped member that can be inserted into the through-hole 40a and has a certain level of strength may be used.

[0042] The form holding fitting 2 and the concrete foundation insulation construction method using the form holding fitting 2 according to the second embodiment of the present invention configured as described above have the following advantages.

[0043] By making the vertical length of the side panels 40 for holding the steel formwork K shorter than the vertical length of the steel formwork K, it is possible to reduce the weight of the formwork holding fittings 2 and to make the formwork holding fittings 2 easier to set on the steel formwork K. This makes it highly convenient and further reduces the construction period and labor required for concrete foundation insulation work.

[0044] Furthermore, by providing through holes 40a at predetermined positions in the side panels 40 for holding the steel formwork K and configuring the structure so that nails can be inserted into the through holes 40a, the nails become caught on the steel formwork K, preventing the formwork holding fittings 2 from floating up during concrete pouring. This improves work efficiency and enables concrete to be poured with even greater precision.

[0045] In the second embodiment of the present invention described above, a steel formwork K is used as the formwork arranged opposite the insulating material D, but this is not necessarily limited to this configuration, and instead of the steel formwork K, a wooden formwork may be used, or waterproof waran plywood (so-called plywood) may be used.

[0046] The formwork holding hardware 1 according to the first embodiment of the present invention and the formwork holding hardware 2 according to the second embodiment are originally intended to be used simultaneously when pouring concrete foundation insulation work. Specifically, as shown in Fig. 1, formwork holding hardware 1 is used in locations where a pair of insulating materials D need to be arranged opposite each other, and formwork holding hardware 2 is used in locations where it is not necessary to arrange a pair of insulating materials D opposite each other and where insulating materials D need to be arranged opposite a steel formwork K or a wooden formwork. However, for the sake of convenience, the formwork holding hardware 1 and formwork holding hardware 2 have been described separately above. [Industrial Applicability]

[0047] According to the present invention, it is possible to prevent gaps from occurring between the concrete and the insulation material, and it is also possible to shorten the construction period and reduce the labor required for concrete foundation insulation work, making it useful in industrial fields related to concrete foundation insulation work and highly applicable industrially. [Explanation of symbols]

[0048] 1 Formwork holding hardware 2 Formwork holding hardware 3. Base concrete 4. Concrete 4a Top 5 anchor bolts 10 Mainframe 11 Top plate 12 Side panel 12a First side panel 12b Second side panel 20 Locking plate 30 Side panel fixing member 40 Side panel 40a through hole D. Insulation K Steel formwork K1 Upper Plate K2 recess P length S cutting section

Claims

1. This formwork holding hardware is used to hold opposing plate-shaped insulation materials together so that they can also be used as formwork when pouring concrete foundation insulation work, and is characterized by the fact that it comprises a main frame consisting of a top plate whose length exceeds the length between the outer sides of the opposing insulation materials, a pair of side plates hanging from the left and right ends of the top plate, and a pair of locking plates hanging from the underside of the top plate at a position inside each of the pair of side plates so as to be positioned opposite each of the side plates, the vertical length of the pair of side plates being approximately the same as the vertical length of the insulation materials, and the length from each of the pair of side plates to the locking plate positioned opposite each side plate being approximately the same as the thickness of the insulation materials.

2. The formwork holding hardware described in claim 1, characterized in that the pair of side panels are composed of L-shaped members when viewed in a plane, and have a cut portion at the lower end of the surface that intersects with the longitudinal direction of the insulation material, formed by cutting the side panels a predetermined length from the lower end to the upper end.

3. 3. A form-holding metal fitting according to claim 1, wherein the vertical length of the pair of locking plates is shorter than the vertical length of the heat insulating material.

4. This formwork holding hardware is used to hold together a plate-shaped insulation material placed inside or outside a building and a steel or wooden formwork placed inside or outside the building so as to face the insulation material, so that the insulation material can also be used as a formwork when pouring concrete foundation insulation work.The formwork holding hardware is used to hold the insulation material and a steel or wooden formwork placed inside or outside the building so as to face the insulation material, so that the insulation material can also be used as a formwork when pouring concrete foundation insulation work.The formwork holding hardware comprises a top plate whose length exceeds the length between the outer sides of the insulation material and the steel or wooden formwork, a main frame consisting of a pair of side plates hanging down from the left and right ends of the top plate, and a locking plate hanging down from the underside of the top plate at a position inside the side plate for holding the insulation material, so as to face the side plate for holding the insulation material,

5. The side plate for holding the heat insulating material is formed of an L-shaped member in a plan view, and is provided at the lower end of the surface intersecting the longitudinal direction of the heat insulating material by a predetermined length from the lower end to the upper end.

5. The form-holding metal fitting according to claim 4, further comprising a cut portion formed by cutting a plate.

6. A formwork holding fitting as described in claim 4 or 5, characterized in that the vertical length of the side panels for holding a steel formwork or a wooden formwork is shorter than the vertical length of the steel formwork or the wooden formwork.

7. 7. A form-holding metal fitting according to claim 6, wherein through holes are provided at predetermined positions on the side panels for holding the steel or wooden form.

8. 4. A method for pouring and constructing concrete foundation insulation work using formwork holding hardware as described in claim 3, characterized in that: a plurality of plate-shaped insulation materials are placed at predetermined positions on the base concrete, and a plurality of the insulation materials that make up the corners and stop portions are fixed, then a plurality of formwork holding hardware are arranged at predetermined intervals so that each of the insulation materials arranged opposite each other is sandwiched between a side panel and a locking plate, then side panel fixing members extending in the longitudinal direction of the insulation materials arranged opposite each other are arranged at the cut portions of the side panels so as to abut against the side panels, concrete is poured, then the formwork holding hardware is removed from the insulation materials arranged opposite each other, and the upper ends of all the insulation materials are cut so that they are flush with the top edge of the concrete.

9. 10. A method for pouring and constructing insulation for concrete foundations using formwork retaining hardware as claimed in claim 7, comprising: arranging a plurality of plate-shaped insulation materials and a plurality of steel or wooden formworks at predetermined positions on the base concrete; fixing a plurality of the insulation materials constituting the corners and stop portions of the plurality of insulation materials; clamping each of the insulation materials between side panels and locking plates; arranging a plurality of formwork retaining hardware at predetermined intervals so that each of the steel or wooden formworks abuts against the side panels; then arranging side panel fixing members extending in the longitudinal direction of the insulation materials at the cut portions of the side panels to abut against the insulation-retaining side panels; pouring concrete; removing the formwork retaining hardware from the insulation materials and the steel or wooden formworks that are arranged opposite each other; removing the steel or wooden formwork; and finally cutting the tops of all the insulation materials so that they are flush with the top edge of the concrete.

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