Underwriting hardware

Abstract

To provide a very convenient and safe underlayment hardware which is safe because the joists and the joists can be kept firmly fixed even when the assembled form is rotated several times since the joists are fitted into the fitting holes, and can be used as a workbench and can be assembled with the pouring surface of a concrete panel facing upward, eliminating the need to arrange a curing sheet, eliminating the need to take the time to lay out and turn over the curing sheet, and eliminating the risk of the slab support falling. [Solution] The device is characterized by comprising at least a joist support portion on which the joist is loaded, a joist fitting portion having a fitting hole for fitting the joist and a nail hole for nailing to a batten provided at the end of the concrete panel, and a mortise hole loose fitting portion provided on the underside of the joist support portion and for inserting into a mortise hole in the support plate of the pipe support.

Description

[Technical Field]

[0001] This invention relates to a bracket support hardware that combines the functions of hardware known as a butacus, which is used to hang battens attached to concrete panels onto joists when assembling the formwork for the bottom of the beam, and hardware known as a slab support, which is used to hang joists by fitting them into mortise holes in the support plate of a pipe support, and which can also be used as a workbench on which the joists are placed when assembling the formwork for the bottom of the beam. [Background technology]

[0002] Conventionally, the procedure for assembling a beam-bottom formwork involves laying a curing sheet on the work floor, placing a concrete panel with battens already nailed to both sides of its backside face down on top of it, arranging joists inside the battens in the longitudinal direction of the concrete panel, and then arranging joists on top of the joists in a direction perpendicular to the joists. However, when wooden joists are used, nails are driven into the corners of the joists as shown in Figure 2, and if the joists are reused several times, the corners of the joists are gradually worn down by the nails, causing durability issues. There is also the risk that the nails will come loose during the lifting process, causing the joists to come loose and fall.

[0003] Therefore, as shown in Figure 3, durable steel pipes are often used for the joists, and in that case, butt screws through which the joists pass are nailed to the piers to secure the joists to the piers. After the forks of the slab support are installed so that they sandwich the joists, the concrete panel with the joists attached is turned over, then it is hoisted with a wire using a crane or similar device and moved to the designated location. The slab support's protrusions are then inserted into the mortise holes in the support plate of the pipe support installed in the designated location, and the pipe support is then pushed up from below to support the joists. The bottom beam formwork is then connected to the other formwork, and the side beam formwork is then connected, and once these are solidified, the beam formwork is complete.

[0004] In addition, after concrete was poured and the curing period had passed, the beam bottom formwork was often left assembled and reused for the next block, rather than being dismantled into pieces.

[0005] Therefore, it is possible to consider a system in which the buttocks and slab support are integrated, and for example, prior art has been disclosed for a connecting metal fitting that connects the formwork and the support (Reference 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-254520 Summary of the Invention [Problem to be solved by the invention]

[0007] The conventional technology is excellent in that it allows joists to be easily attached to the battens of concrete panels using butt screws, but the nails in the butt screws are short and easily come loose, and because the butt screws do not press the battens flat, the butt screws gradually loosen as the formwork for the main assembly is reused, and when the butt screws are lifted with wires, the weight of the butt screws can cause them to come off the battens, creating a risk of the joists, butt screws, and joists falling. Also, after attaching the slab supports to the joists, it was often observed that the slab supports would shift from their designated position or fall off the joists. If the slab supports fell, there was a risk of them being reinstalled, as the installation of the beams is done at high altitudes. Furthermore, the prior art of Patent Document 1 is superior in that it integrates the butt screws and slab supports into one piece. However, because it is simply a combination of these components and is a U-shaped piece, if it is to be reused in a fully assembled state, the weight of the joists and hardware is held in place only by nails, which could cause the nails to come loose and cause the joists, floor joists, and connecting hardware to fall. Furthermore, because the prior art of Patent Document 1 is U-shaped, the joist abutment plate that contacts the joists can only be two small, strip-shaped pieces, which means that when lifted, the surface area that can withstand the twisting force of the joists on the joists is very small. Therefore, the twisting force is applied directly to the nails, making them prone to coming loose and creating a risk of the joists and connecting hardware falling during the lifting process. Furthermore, the prior art of Patent Document 1 is not self-supporting when placed on the ground or floor, and the protruding parts do not have the strength to support the beam formwork, making it unusable as a workbench. Therefore, when lifting the beams from the bottom, it was time-consuming to prepare the protective sheet, lay it out, and turn over the assembled formwork.

[0008] The present invention solves these problems by fitting the joists into the fitting holes, so that the battens and joists can remain firmly fixed even if the assembled formwork is rotated multiple times, making it safe.It can also be used as a workbench, and the concrete panel can be assembled with the pouring surface facing upward, so there is no need to prepare the curing sheet, and there is no need to go to the trouble of laying and turning over the curing sheet.In addition, there is no risk of the slab support falling, so this invention provides a very convenient and safe underlayment hardware. [Means for solving the problem]

[0009] In order to achieve the above object, the joist hardware according to claim 1 of the present invention comprises at least a joist support part on which a joist is loaded, a joist fitting part having a fitting hole for fitting the joist and a nail hole for nailing to a batten provided at the end of a concrete panel, and a mortise hole loose fitting part provided on the underside of the joist support part and for inserting into a mortise hole in a support plate of a pipe support. and a geta portion provided on the outer periphery of the lower surface of the main support portion and in contact with the ground or floor to support the main support portion and the main support fitting portion. It is characterized by the fact that

[0010] By adopting this configuration, the joist support hardware of the present invention is made of metal, and the joist support portion on which the joist is placed and the joist fitting portion are integrated by bending or welding. The joist is fitted into the fitting hole of the joist fitting portion. The upper part of the fitting portion of the joist fitting portion is provided with a nail hole for nailing the joist fitting portion to the pier. The joist support portion and the joist fitting portion securely fasten the joist to the joist, and the nail holes and nails securely fasten the joist to the pier provided on the outer periphery of the concrete panel. Therefore, even if a concrete panel with joists attached is hoisted using a sling and lifted by a crane, the joists will fit into the fitting hole and the long nails will keep them securely fastened to the pier. This prevents the joist support hardware from coming loose from the pier, and the joists, floor joists, etc. will not fall, allowing for safe lifting operations.

[0011] Furthermore, the main underpinning hardware of the present invention allows the mortise hole loose-fitting portion to be inserted into the mortise hole in the support plate of the pipe support. Therefore, even during lifting work using a crane, the main underpinning hardware of the present invention incorporated into the main assembly of the beam-bottom formwork can be easily inserted into the mortise hole in the support plate of the pipe support. Furthermore, once inserted, the mortise hole loose-fitting portion will not come out of the mortise hole because it is subjected to the weight of the formwork. Therefore, the installation work of the beam-bottom formwork can be carried out easily and safely.

[0012] The underpinning hardware according to claim 2 of the present invention is the underpinning hardware according to claim 1. ,before The clog portion is provided on the side of the joist fitting portion.

[0013] These configurations allow the bottom sill of the joist hardware of the present invention to be stably installed on the ground or floor. Therefore, the formwork for the beam bottom can be assembled with the concrete panel facing up, eliminating the need to prepare the curing sheet. Furthermore, when lifting the bottom beam formwork, the formwork can be lifted in its original state. This reduces the need for turning over, saving labor and increasing safety. Furthermore, since the sill and the joist fitting portion are on the same side, the sill can be made by bending downward the metal of the fitting hole, eliminating material waste.

[0014] Claims of the present invention 3 The underwriting hardware related to the claim 2 In the main underpinning hardware described above, the height of the clog portion and the mortise hole loose fit portion are the same.

[0015] By adopting this configuration, the joist hardware of the present invention can be firmly stabilized without shaking when placed on a substantially level ground or floor. Also, since the joist section can be made substantially level, it is easier to place the joists on the joist section, improving work efficiency and safety.

[0016] Claims of the present invention4 The underwriting hardware according to claim 1 or 2 or 3 The main underpinning hardware described in claim 1 is characterized in that the nail holes are provided in plural. 5 The underwriting hardware related to the claim 4 In the main support hardware described above, the nail hole is provided in a crosspiece contact surface above the fitting hole of the main support fitting portion, which is provided to fit tightly to the crosspiece.

[0017] These configurations allow the following claims 4 The underpinning hardware according to claim 1 can be securely fastened to the pier with multiple nails, so the underpinning hardware will not come off the pier more reliably. Therefore, even if the hoisting work with wires is performed multiple times to rotate the beam bottom formwork multiple times, the underpinning hardware will not come off, so it is possible to prevent the joists from falling. 5 The main underpinning hardware in this case has its batten contact surface in close contact with the batten and is nailed in place at multiple points, so the main underpinning hardware does not shift relative to the batten and can maintain a tight contact state. This makes it easier to solidify the formwork, and because the main underpinning hardware does not vibrate, the nails will not come loose during work, allowing for safe work. [Effects of the Invention]

[0018] From claim 1 of the present invention 5The underpinning hardware described in the above document can be securely fixed to the joists and crosspieces. Therefore, suspended loads will not fall, allowing for safe work. Furthermore, the beam-bottom formwork will not collapse in the assembled state, allowing for repeated reuse and improving work efficiency. Furthermore, curing sheets to protect the concrete panels are not required, and the labor required to turn over the assembled formwork is also eliminated, saving labor and improving safety. Furthermore, once inserted into the mortise holes in the pipe support receiving plate, they will not come off, making installation on the pipe support safe and easy, improving work efficiency. Furthermore, the simple structure reduces the labor required for fabrication. Furthermore, since metal materials are used, they can be used for a long period of time without deterioration. Therefore, once fabricated, they can be used for a long period of time, reducing material costs. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic perspective view of a main underpinning according to an embodiment of the present invention. [Figure 2] FIG. 1(a) is a schematic perspective view of a conventional embodiment of a joist or beam bottom formwork to which wooden joists are nailed, and FIG. 1(b) is a cross-sectional view taken along the line AA. [Figure 3] 1(a) is a schematic perspective view of another conventional embodiment of a joist and beam bottom formwork using steel pipe joists as slab supports and buttocks, and FIG. 1(b) is a cross-sectional view taken along the arrow BB. [Figure 4] This shows a state in which a main underpinning hardware according to an embodiment of the present invention is used in a beam bottom formwork, where (a) is a schematic oblique view and (b) is a cross-sectional view taken along the CC arrow. [Figure 5] This is a schematic perspective view showing a state in which a beam bottom formwork using a main underpinning hardware according to an embodiment of the present invention is sling-hung with a wire. [Figure 6]The figures show the state in which a main support hardware according to an embodiment of the present invention is used to assemble the structure on the ground surface, where (a) is a schematic perspective view showing the state in which floor joists are arranged on top of the joists, and (b) is a schematic perspective view showing the state in which concrete panels with battens are placed on top and nails are driven into the battens. DETAILED DESCRIPTION OF THE INVENTION

[0020] As shown in Figure 1, the joist support hardware 1 of the present invention is made of metal, such as hot-rolled mild steel plate, and is composed of at least a joist support portion 2 on which the joist rests, a joist fitting portion 3 with fitting holes 3-1 and nail holes 3-3 for fitting the joist, and a mortise hole loose-fit portion 4 that is inserted into a mortise hole 13-2 in the support plate of the pipe support. The joist support portion 2 and the joist fitting portion 3 are integrated by bending or welding, and the angle between the two members 2 and 3 is approximately 90 degrees. In the joist support hardware 1, the joist support portion 2 is 90 to 110 mm in the length direction of the joist 10 and 90 to 140 mm in the width direction of the joist 10, and the joist fitting portion 3 has a height of 90 to 140 mm. For example, when using a 65 mm square joist 10, it is preferable that the joist receiving portion 2 is 105 mm in the length direction of the joist 10, 105 mm in the width direction of the joist 10, and the height of the joist fitting portion 3 is 105 mm.

[0021] The main support portion 2 is flat, with the main support 10 placed on its upper surface and the support plate 13-1 of the pipe support 13 placed on its lower surface, and is provided with a mortise hole loose fitting portion 4 on its lower surface for insertion into the mortise hole 13-2 of the support plate 13-1.

[0022] The joist fitting portion 3 has a fitting hole 3-1 for fitting the joist 10, a joist contact surface 3-2 for contacting the joist 14 of the formwork, and nail holes 3-3. The joist contact surface 3-2 has multiple nail holes 3-3 for driving nails 6 into the joist 14. Therefore, the joist 14 and the joist fitting portion 3 are in close contact over a wide area at the joist contact surface 3-2 and are fastened with nails 6 at multiple locations, ensuring a secure fixation. The joist 10 is also fixed to the joist support portion 2 through the fitting hole 3-1. The joist support portion 2 and the joist fitting portion 3 form an approximately right angle and are integrated. As a result, the joists 14 on both sides of the concrete panel 11 can be securely fixed by being sandwiched between the joist 10 and the joist support hardware 1 on both sides.

[0023] The mortise hole loose fit portion 4 can be loosely fitted into the mortise hole 13-2 of the support plate 13-1 of the pipe support 13. There is a small amount of clearance between the mortise hole 13-2 and the mortise hole loose fit portion 4, so it is easy to insert the beam bottom formwork when installing it on the pipe support 13, improving work efficiency. After the beam bottom formwork is installed on the pipe support 13, the weight of the beam is applied to the pipe support 13, so the mortise hole loose fit portion 4 will not come out of the mortise hole 13-2. In addition, because the mortise hole loose fit portion 4 is at the same height as the clog portion 5, the main beam support portion 2 can be made approximately horizontal and, together with the clog portion 5, can serve as the legs of a workbench. The mortise loose fit portion 4 may be produced by welding it to the underside of the main support portion 2, or by creating a convex portion of a predetermined shape on part of the main support portion 2, making notches on both sides of the base of the convex portion, bending it downward, and then bending it further so as to round it into a cylindrical shape.

[0024] The bottom sill 5 is located on the outer periphery of the main beam support 2, below the joist fitting 3. When assembling the beam-bottom formwork on a work floor or the ground, the main beam support hardware 1 of the present invention can be used as a workbench by fitting the joists 10 onto it, and the bottom sill 5 serves as the legs of the workbench. The bottom sill 5 can be made by cutting the three sides (side and top) of the fitting hole 3-1 of the joist fitting 3 and bending the remaining bottom side downward from the outside, or by cutting all four sides completely and then welding them together. The bottom end of the bottom sill 5 can also be bent into an L-shape.

[0025] The nail 6 is driven into the crosspiece 14 through the nail hole 3-3 of the joist fitting portion 3 to secure the underpinning hardware 1 to the crosspiece 14. The nail 6 only needs to be long, thick, and have a head that allows it to be securely fastened to the crosspiece 14.

[0026] Next, an example of a manufacturing method for the joist 1 according to the present invention is described. First, a hot-rolled mild steel plate cut to a predetermined shape is pressed and bent to form the joist 2 and the joist fitting portion 3. Next, the joist fitting portion 3 is notched at a predetermined position and then pressed and bent to form the fitting hole 3-1 and the mortise portion 5, and excess steel plate is cut off. A steel pipe with a diameter smaller than the mortise hole 13-2 is then cut to the same length as the mortise portion 5 and welded to a predetermined position on the underside of the joist 2. Next, nail holes 3-3 are drilled at predetermined positions on the battenuator contact surface 3-2, and the joist is then painted with an anti-rust coating to complete the joist. Note that if the joist is made from plated steel plate, the anti-rust coating is not necessary.

[0027] Next, an example of how to use the joist support hardware 1 according to the present invention will be described with reference to FIG. 6. First, two or more joist support hardware 1 (the same number as the joists 10) are placed facing each other at predetermined positions on both sides. Then, each joist 10 is fitted into the fitting holes 3-1 of the opposing joist support hardware 1, and loaded onto the joist support portion 2. As a result, when assembling the bottom of a beam on a nearly level work floor or ground, the mortise hole clearance portion 4 and the mortise bottom portion 5 of the joist support hardware 1 allow the joist support portion 2 to be nearly level, so that the joists 10 can be erected nearly horizontally. Next, as shown in FIG. 6(a), multiple joists 10 are erected at predetermined intervals, and a predetermined number of joists 12 are erected between each joist 10 in a direction perpendicular to the joists 10. Separately, concrete panels 11 for the bottom of the beams have been cut to a specified width and have battens 14 nailed to the sides. These are then placed in their specified positions, with the concrete panels 11 on the joists 12 and the battens 14 on the joists 10. Then, as shown in Figure 6(b), the battens 14 are fixed in place by driving nails 6 into the nail holes 3-3 in each of the underpinning hardware 1. This completes the main assembly work of the beam bottom formwork on the ground.

[0028] Another example of how to use the main underpinning hardware 1 according to the present invention will be described with reference to Figures 4 and 5. First, the assembled beam bottom formwork is sling-wired 30 to a predetermined position, hoisted with a crane, and moved to a predetermined location. Then, it is slowly lowered to place the beam bottom formwork between the predetermined columns. While the main underpinning hardware 1 is being pushed up from below so that the mortise hole clearance 4 of the main underpinning hardware 1 is inserted into the mortise hole 13-2 of the pipe support 13, the pipe support 13 is adjusted to a predetermined length, and the pipe support 13 is fixed in place. This completes the beam bottom formwork.

[0029] The joist support hardware 1 of the present invention can reliably secure the joists 10 and crosspieces 14. The loose-fitting mortise holes 4 can be inserted into the mortise holes 13-2 of the support plate 13-1 of the pipe support 13, preventing them from coming loose. This prevents the load from falling, allowing for safe operation. Furthermore, the beam-bottom formwork remains intact after assembly, allowing for repeated reuse and improving work efficiency. Furthermore, no protective sheet is required to protect the concrete panel 11, and there is no need to flip the assembled formwork over, saving labor and improving safety. Furthermore, the work of attaching the joists 10 to the formwork and installing them on the pipe support 13 is safe and easy, improving work efficiency. Furthermore, the simple structure eliminates the labor required for fabrication. Furthermore, the use of metal materials prevents deterioration over a long period of time, allowing for continued use. Therefore, once fabricated, the joists can be used for a long period of time, reducing material costs. [Industrial Applicability]

[0030] It can be widely used in the construction industry, especially in the field of formwork support. [Explanation of symbols]

[0031] 1: Underwriting hardware 2: Major Underwriter 3: Joist fitting part 3-1: Fitting hole 3-2: Close contact surface of crosspiece 3-3: Nail holes 4: Mortise hole loose fit part 5: Geta Club 6:Nail 10: Joist (steel pipe) 10-1: Joist (wooden flaps) 11: Concrete panel 12: Joist 13: Pipe support 13-1: Support plate 13-2: Mortise hole 14: Pole 20: Butakas 21: Slab support 30: Sling wire 100: Ground surface

Claims

1. A beam support hardware is characterized by comprising at least a beam support portion on which the beam is loaded, a beam fitting portion having a fitting hole for fitting the beam and a nail hole for nailing to a batten provided at the end of a concrete panel, and a mortise hole loose fitting portion provided on the underside of the beam support portion and for inserting into a mortise hole in a support plate of a pipe support, and a geta portion provided on the outer periphery of the underside of the beam support portion and in contact with the ground or floor to support the beam support portion and the beam fitting portion.

2. 2. The joist hardware according to claim 1, wherein the geta portion is provided on the joist fitting portion side.

3. 3. The underpinning hardware according to claim 2, wherein the height of the clog portion and the mortise hole loose fitting portion are the same.

4. 4. The underpinning hardware according to claim 1, 2 or 3, characterized in that a plurality of nail holes are provided.

5. The underpinning hardware according to claim 4, characterized in that the nail hole is provided on a crosspiece contact surface above the fitting hole of the crosspiece fitting portion, which is provided to make a tight fit with the crosspiece.

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