JP5924632B1 - Formwork support - Google Patents

Abstract

Formwork that is not bulky and lightweight, does not cause a mistake in the concrete joining surface, is easy to manage parts, can be applied to a plurality of formwork assembly methods, and can be efficiently assembled Provide support. A formwork support fixed to a screw shaft protruding from a concrete surface previously placed, the formwork support comprising a central base end portion, a first support portion, And the second base portion 30 has an insertion hole 11 into which the screw shaft portion is inserted, and the first support portion and the second support portion are arranged along the concrete surface. The first support portion 20 extends in a direction away from the central base end portion, and the first support portion 20 is spaced apart from the concrete surface with a dimension of supporting the formwork plywood, and the second support portion 30 is A gap having a size larger than the thickness of the mold plywood was separated from the concrete surface. [Selection] Figure 1

Description

  The present invention relates to a formwork support that supports a formwork forming a space for placing concrete. More specifically, it is fixed to the P-cone screw shaft part left on the lower concrete surface previously placed, and supports the upper formwork where concrete is placed later, mainly the concrete joint part. The present invention relates to a formwork support used in the above.

  The molds are assembled by connecting the facing molds with a separator so that the gap does not open even if pressure is applied to spread the molds from the inside by placing concrete. Specifically, a separator through-hole is drilled at a position facing each mold. Each of the threaded shaft portions of the P cone screwed and fixed to both ends of the separator is passed through the separator through hole. And a formwork fastening metal fitting is attached to the screw shaft part of P cone, it tightens so that a formwork may not loosen, and a formwork is assembled.

  After the concrete is cast and solidified, the formwork is removed from the concrete housing and the P-cone is removed leaving a separator in the concrete housing. The formwork support of the present invention is a formwork support that is fixed to a concrete case via a screw shaft portion of the P-cone while leaving the P-cone in the concrete case.

  Concrete structures are constructed by placing concrete from below. The method of assembling the formwork at the joint between the first placed concrete (hereinafter referred to as “first concrete”) and the later placed concrete (hereinafter referred to as “rear concrete”) is concrete placement. Conventionally, there has been a different formwork assembly method between a civil engineering formwork assembly method in which the surface is used as a finished surface and an architectural formwork assembly method in which the finished surface is painted or tiled. Depending on the difference in the formwork assembling method, the formwork assembling method and the formwork support were changed, and the formwork was assembled.

  In the civil engineering formwork assembling method, the inner surface of the lower concrete formwork is covered with the previous concrete face. The formwork is provided with a plurality of pedestals only in the longitudinal direction of the plywood so that the covering portion is in good contact with the previous concrete surface, and the lateral direction is bendable. And the lower part of the following concrete formwork is covered with the previous concrete surface, and the formwork of the joint part is assembled.

  An insertion hole for inserting the shaft body of the P-cone is formed in the lower part of the later concrete formwork in accordance with the position of the screw shaft part of the uppermost P-cone. Then, this insertion hole is inserted into the screw shaft portion of the uppermost P cone remaining in a state of protruding from the previous concrete surface, and the mold is fixed at a predetermined position, and the mold is assembled. It has been. However, in addition to the large and heavy formwork, there are multiple pairs of insertion holes and P-cone shafts, so positioning is difficult, and assembling the concrete formwork later requires a lot of work. It has become.

  On the other hand, in the formwork assembling method of the building system, the formwork is made by nailing a frame material made of piers around the entire periphery of the plywood, and the four circumferences are surrounded by the frame material. Then, a square member is horizontally fixed at a predetermined height on the outer surface of the previous concrete, and a frame member below the mold is placed thereon and fixed.

  Specifically, a mold support bracket is fixed using a screw shaft portion of the uppermost P cone, and the square member is fixed thereon. This mold support metal fitting is substantially L-shaped, and is fixed so that a leg portion extending downward is fixed to the previous concrete surface and an arm portion extending horizontally is projected from the previous concrete surface. Then, the square is placed on the arm portion, and the height is adjusted so that the square is horizontal. The position of the formwork is fixed by being pushed by the pressing means from the outside so that the squarework or the formwork placed on the squarewood is not displaced.

  As a technique for disclosing the pressing means for the formwork support tool having a substantially L shape, the technique of Prior Art Document 1 for pressing a square member using a wedge member, and a fastening tool having a screw portion provided on the mounting portion are used. As a pressing means, a technique of Prior Art Document 2 in which a mold is pressed through a square member is disclosed. In addition, the technique of the press means about the formwork support tool which consists of the bent board | plate material is disclosed by prior art document 3. FIG.

  Prior art document 1 has an L shape as a whole, and is composed of a downward hanging portion and a mold support portion protruding in the horizontal direction, and a vertical adjustment bolt on the base end side of the mold support portion. In addition, a technique of a concrete mold support metal fitting provided with a mold fastening device as a pressing means on the rear end side is disclosed. A long slot for attachment is formed in the hanging portion so that the vertical position can be adjusted. Further, the position of the mold placed on the mold support is adjusted in the height direction by vertical adjustment bolts, and the wedge member is used as a mold clamping device to be tightened.

  The formwork support metal fitting described in Prior Art Document 1 requires a horizontal length that combines the length on which the formwork and the square member are placed and the long hole into which the wedge is inserted as the projecting length of the formwork support part. In order to fix it so as to protrude in a cantilever state, the hanging part was also made long. Moreover, since high intensity | strength is required, it was made from metal. Therefore, the mold support bracket itself becomes large and heavy, and it is impossible to carry and work with a plurality of mold support brackets. There was a problem.

  In addition to adjusting the height of the mold support bracket, it is also necessary to finely adjust the height in accordance with the warp of the square member, and to fix the square member with a wedge member. In the case of this mold support bracket, since a wedge member is required in addition to the main body of the mold support bracket, it is necessary to manage the parts by matching the number of the main body of the mold support bracket and the number of wedge members. There was also a problem of being.

  Prior art document 2 discloses a technique of an L-shaped integrated concrete form support bracket for concrete. In this formwork support bracket, the placement part of the formwork that protrudes horizontally from the previous concrete surface is configured in two stages, a lower placement part and an upper placement part. The lower placement part supports the lower end of the concrete formwork, and the formwork is brought into close contact with the concrete surface by pressing means via the square material placed on the upper placement part.

  Since it is an integral type, it is easy to manage the number of parts, and it has the advantage that it is tightened so that the formwork will not loosen, and it is easy to prevent mistakes. On the other hand, a square member having a thickness that can withstand the pressing force of the pressing means is required, and, like the prior art document 1, since it is configured to have a substantially L shape, the metal fitting becomes larger and heavier, and the workability is improved. There was a problem of getting worse.

  Prior art document 3 discloses a technique of a small and easy-to-handle concrete mold mounting apparatus. The mounting device is configured to include a mounting bracket including a mounting piece and a standing piece that is inclined slightly outward. The mounting device supports the mold frame on the mounting bracket via a mold bracket made of an angle material, and inserts a wedge member into the through-hole drilled in the mounting bracket so that the mold frame is mounted together with the mold receiving bracket. It is something to support.

  According to the mounting apparatus described in Prior Art Document 3, in order to support the mold first, an angle member extending in the horizontal direction forming the mold receiving bracket is inserted, and the mold frame is inserted into the mold receiving bracket. There is a problem that it takes time to assemble, because it is necessary to insert the wedge member and tighten the formwork. In addition, it is necessary for an operator to carry many types of members such as mounting brackets, mold receiving brackets, wedge members, and the like that constitute the mounting device, and the work for assembling the mold becomes complicated. In addition, there is a problem that the management of the number of parts is complicated.

  As described above, in the case of the civil engineering formwork assembling method, there is no formwork support suitable for the formwork assembling method, and it takes time to assemble the formwork and the workability is not good. In the case of an architectural formwork assembly method, there is a problem that the formwork support is large and difficult to handle, or is small but has only a large number of parts, and parts management is complicated or workability is not good. It was.

Japanese Utility Model Publication No. 55-18501 Japanese Utility Model Publication No.59-42246 Japanese Utility Model Publication No. 52-109718

  Therefore, the inventor of the present application is not bulky and lightweight, does not cause a mistake in the concrete joining surface, is easy to manage parts, and can be applied to a plurality of formwork assembling methods. It was made into the subject to provide the formwork support tool which can work.

  1st invention of this invention is a formwork support fixed to the screw-shaft part protruded from the concrete surface previously cast | placed, Comprising: The said formwork support is the central base end which makes integral The central base end portion is disposed in contact with the concrete surface, and has a long hole for inserting the screw shaft portion, and the concrete surface includes a first support portion and a second support portion. The distance from the center base end surface is the same as the thickness of the mold plywood, and the first support portion and the second support portion are in the opposite direction from the center base end portion along the concrete surface. The gap between the inner surface of the first support part and the concrete surface is extended and the gap between the inner surface of the second support part and the concrete surface is different from each other. With the concrete surface fixed, the inner surface of the first support part and the concrete The mold plywood can be sandwiched in a gap that is separated from the mold surface, and a corner that is thicker than the thickness of the mold plywood in the gap that separates the inner surface of the second support portion and the concrete surface. It is characterized in that the member can be sandwiched.

  The formwork may be a formwork in which a crosspiece is fixed around the periphery of the formwork plywood, or a formwork in which a plurality of crosspieces are fixed only in the longitudinal direction of the formwork plywood. The material of the mold support is not limited, and may be made of resin or metal. Further, the mold support may be a molded product formed integrally, or may be a product obtained by bending a plate. The screw shaft portion protruding from the concrete surface is a screw shaft portion of a P cone which is used for assembling a concrete mold previously placed and is not removed, but is not limited thereto.

  If the distance between the outer surface of the central base end and the previous concrete is set to the same thickness as that of the mold, the screw shaft portion of the P cone remaining in the previous concrete frame is inserted into the insertion hole of the mold support. The length of the threaded portion of the projecting screw shaft portion is the same as the length projected from the mold before the previous concrete placement. Thereby, although it is easy and suitable to fix a formwork support with a formwork fastener or a nut, it is not limited to this.

  The P-cone can be used without being removed from the previous concrete frame while being embedded in the concrete frame. As a result, the P-cone does not float and the formwork can be fixed so that there is no gap between the previous concrete surface and the inner surface of the subsequent concrete formwork. can do. The width and height of the central base end may be any width and height that can form the insertion hole, and can be small.

  The 1st support part and the 2nd support part are prolonged in the direction away from a central base end part along a concrete surface. A gap having a width slightly narrower than that of the mold plywood is supported between the first support portion and the concrete surface with the mold plywood interposed therebetween.

  The width | variety and length of a 1st support part should just be able to be supported on both sides of a mold plywood etc., and although it can be made small, it is not limited. The gap formed by the first support portion is a width that supports the mold plywood so that the mold plywood is not loosened. Since the gap formed by the second support portion is a wider gap than the mold plywood, a member thicker than the mold can be fixed so as not to loosen, and the mold can be held loosely.

  When selecting a civil engineering-based formwork assembly method, arrange the formwork support so that the first support part is on the top, and divide the lower part and the upper part of the formwork plywood and separate them. In this state, the screw shaft portion of the P cone can be disposed so as to be positioned in the spaced gap. This eliminates the need to insert the plurality of screw shaft portions into the insertion holes, and the mold assembly work is greatly reduced. The details will be described in the first embodiment in comparison with the conventional construction method together with the architectural formwork assembly method.

  Next, when selecting an architectural formwork assembling method, a crosspiece is fixed as a frame material around the formwork, so a square member for mounting the frame material is fixed by a formwork support. That's fine. In this case, the second support part of the formwork support is disposed facing upward, and a square member for placing the frame material on the lower edge of the formwork is sandwiched between the second support parts. The square member may be a crosspiece with a width that allows the lower frame of the formwork to be nailed.

  Since the gap between the second support part and the concrete surface is wider than the mold plywood, the gap is fixed and sandwiched with a square member that forms a member extending in the horizontal direction. It is possible. The square material on which the frame material at the lower edge of the mold is placed is thicker than the mold plywood and extends in the horizontal direction, making it easier to place the frame material at the lower edge of the mold and making the joint part Frame assembly work is easy.

  As described above, the formwork support of the first invention of the present invention is a small formwork support as a whole because the dimensions of the central base end, the first support, and the second support are not increased. Further, since the material is not limited, the weight can be reduced. Since the formwork support is small and light, it can be carried by carrying a plurality of formwork support, and it is easy to manage the number of parts because it is integrated. In addition, as described above, it can be applied to any of the civil engineering formwork assembling method and the architectural formwork assembling method, so that the workability is good and the formwork assembling work can be efficiently performed. There is an advantageous effect that is not present.

  According to a second aspect of the present invention, in the formwork support according to the first aspect, the second support portion has a holding member pressing means on a side facing the concrete surface, and the holding member pressing means is A curved portion gently curved in a convex manner toward the concrete surface, and a minimum separation distance between the curved portion and the concrete surface is set to a dimension sandwiching the first corner member; The separation distance between the end portion and the concrete surface is such that the second corner member thicker than the first corner member is interposed therebetween.

  Here, the corner member means a pier. The pier is made of a square member having a thickness of 25 mm or 27 mm, and there is a dimensional error in each thickness. In the second aspect of the present invention, a bending portion is provided on the inner side of the second support portion, and the bending portion is used as the clamping member pressing means. According to the second invention, since the clamping member pressing means is provided on the inner side facing the concrete surface, even if there is a dimensional error in the piercing member sandwiched by the second support portion, it is supported so as not to loosen. Is possible.

  According to a third aspect of the present invention, in the formwork support of the first or second aspect, the long hole is a long hole extending along a direction in which the first support portion and the second support portion extend. It is characterized by being. The formwork support of this invention is arrange | positioned so that a formwork plywood may be pinched | interposed by a 1st support part, or the crosspiece which makes a square member may be pinched | interposed by a 2nd support part. According to the third invention, even when the mold frame or the corner member is sandwiched between the first support portion or the second support portion, it becomes easy to adjust the height of the mold frame or the corner member on the upper side, It becomes possible to assemble the formwork with high accuracy.

  According to a fourth aspect of the present invention, in the mold support of the first to third aspects, a nail hole is drilled in at least the second support portion of the first support portion and the second support portion. It is a feature. Since the nail holes are drilled in the second support part, when the civil engineering formwork assembly method is adopted, the lower plywood is inserted between the concrete surface and the vertical pier that extends downward. The lower plywood can be hung from the frame holder. If a nail hole is drilled in the first support portion, the lower edge frame member of the mold can be nailed to the square member and fixed so as not to be displaced.

  According to a fifth aspect of the present invention, in the formwork support of the first to fourth aspects, at least one outer end of the first support portion and the second support portion is expanded outward. It is characterized by including an inclined portion formed with an inclined inner surface shape. If the inner surface shape of the end portion of the first support portion is inclined so as to expand, it is easy to sandwich the formwork plywood into the first support portion so as to follow the concrete surface. It becomes. In addition, if the inner surface shape of the end portion of the second support portion is inclined so as to expand, it is easy to insert the square material into the second support portion so as to follow the concrete surface. It becomes.

  According to a sixth aspect of the present invention, in the mold support of the first to fifth aspects, the mold support is made of resin. Since the formwork support is made of resin, there is an advantageous effect that even when it is used in a damp environment, for example, in an underground pit, it does not rust and has high durability.

-According to the first invention of the present invention, in the case of a civil engineering formwork assembling method, it is not necessary to insert a plurality of screw shaft portions into the insertion holes, and the formwork assembling work is greatly reduced. The In the case of an architectural formwork assembling method, a small formwork support can be obtained as a whole, and the weight can be reduced. Since the formwork support is small and light, it is possible to carry a plurality of formwork support and work, and since it is integrated, the number of parts can be easily managed. It can be applied to any of the civil engineering-based formwork assembly methods and architectural-type formwork assembly methods, and has an unprecedented advantageous effect that the workability is good and the formwork assembly work can be efficiently performed. .

-According to the second invention, since the clamping member pressing means is provided on the inner side facing the concrete surface, even if there is a dimensional error in the crosspiece sandwiched by the second support portion, it is supported so as not to loosen. It becomes possible.
-According to the third invention, it is easy to adjust the height of the upper formwork or corner member even when the formwork or corner member is sandwiched by either the first support part or the second support part. It becomes possible to assemble the mold with high accuracy.
-According to the fourth invention, when the nail hole is drilled in the second support portion, the lower part is placed between the concrete surface and the vertical pier extending downward when adopting the civil engineering formwork assembling method. It is possible to hang the lower plywood by inserting the plywood from the mold holder. If a nail hole is drilled in the first support member, the lower edge frame member of the mold can be nailed to the square member and fixed so as not to be displaced.

-According to 5th invention, in the 1st support part or the 2nd support part currently formed so that it may incline so that the inner surface shape of an edge part may spread, a formwork plywood or a square member may be along a concrete surface In this way, it is easy to insert the product.
-According to the sixth invention, there is an advantageous effect that even if it is used in a high humidity, for example, in an underground pit, it does not rust and has high durability.

Perspective view of formwork support (Example 1) Conventional civil engineering formwork assembly method (conventional example) Civil engineering formwork assembly method (Example 1) Civil engineering formwork assembly method (Example 1) Conventional architectural formwork assembly method (conventional example) Architectural formwork assembly method (Example 1) Architectural formwork assembly method (Example 1) Forming method for underground pit formwork (conventional example) Forming method for underground pit form (Example 1) Perspective view of formwork support (Example 2) Perspective view of formwork support (Example 3)

  With reference to FIG. 1, Example 1 demonstrates the structure of the mold support 1 by a resin molded product. With reference to FIG. 2 to FIG. 9, the conventional formwork assembling method and the formwork assembling method when using the formwork support of the present invention will be described in comparison. FIG. 1 shows a perspective view of the formwork support 1. FIG. 2 shows a conventional civil engineering formwork assembling method, and FIGS. 3 and 4 show a civil engineering formwork assembling method using the formwork support of the present invention. FIG. 5 shows a conventional architectural formwork assembling method, and FIGS. 6 and 7 show an architectural formwork assembling method using the formwork support of the present invention. FIG. 8 shows a conventional method for assembling an upper floor slab of an underground pit, and FIG. 9 shows a method for assembling an upper floor slab of an underground pit using the mold support of the present invention.

  The formwork support 1 includes a central base end portion 10 in contact with the previous concrete surface 100, a first support portion 20, and a second support portion 30, and is integrally formed by resin molding. The 1st support part 20 and the 2nd support part 30 are extended in the direction which spaces apart along the previous concrete surface 10. As shown in FIG. The thickness of the center base end portion 10 is not limited to the thickness of a plywood used as a concrete mold plywood, and is approximately equal to 12 mm, 15 mm, 24 mm, or the like. The following dimensions indicate the dimensions of the formwork support 1 to be adapted when the formwork plywood is 12 mm. The outer dimensions of the mold support 1 are about 3 cm in width, about 13 cm in height, and about 4 cm in thickness.

  The height of the inner surface where the central base end portion 10 is in contact with the concrete is about 7 cm. The central base end 10 has an insertion hole 11 into which the screw shaft portion 40 that protrudes from the widened side of the truncated cone portion of the P cone is inserted. 10 is drilled through. The insertion hole 11 is a long hole that is long in the direction in which the first support portion 20 and the second support portion 30 are separated from each other. The width of the long hole is slightly wider than the threaded shaft portion 40 of the P cone, and the length of the long hole is about 5 cm. The shape of the insertion hole 11 is not limited, and it is needless to say that the threaded shaft portion of the P cone may be inserted.

  The inner surface 21 of the first support portion 20 facing the previous concrete surface 100 is more than the inner surface 12 of the central base end portion so that a later concrete formwork can be sandwiched between the first support portion 20 and the previous concrete surface 100. A step is formed on the outer side. On the inner surface of the outer end of the first support portion, an expanded portion 22 that is gently expanded outward is formed. The length of the gap between the first support portions 20 is about 20 mm. The thickness of the 1st support part 20 should just maintain the intensity | strength which can be supported on both sides of a mold plywood, and is not limited. The first support portion 20 is formed with a nail hole 23 through which a nail is penetrated.

  The second support portion 30 includes an upright portion 31 that stands up from the central base end portion 10 and a bent portion 32 that bends and extends from the upright portion. The bent portion 32 has a slightly curved inner surface from the base end portion 33 to the distal end opening portion 34. The distance from the previous concrete surface 100 to the base end portion 33 of the bent portion is 27 mm, and the distance from the central portion 35 of the curved portion is 25 mm. On the inner surface of the outer end of the second support portion, an expanded portion 36 that is gradually expanded outward is formed. The length of the gap between the second support portions 30 is about 40 mm. The thickness of the 2nd support part 30 should just maintain the intensity | strength which can be supported on both sides of a mold plywood, and is not limited. The second support part 30 is formed with a nail hole 37 through which a nail is penetrated.

(Contrast with conventional formwork assembly method)
Here, in order to make it easy to understand the effects of the mold support 1, a description will be given while comparing it with a conventional mold assembly method using a mold support. As described above, since the civil engineering formwork assembly method and the architectural formwork assembly method are different, the civil engineering formwork assembly method will be described first.

(Contrast with civil engineering formwork assembly method)
A conventional formwork assembling method for a civil engineering joint will be described with reference to FIG. FIG. 2 (A) is a side view showing a state in which the mold is assembled, and FIG. 2 (B) is an explanatory view for explaining a process for assembling the mold. In the conventional civil engineering joint formwork assembling method, the lower inner surface 52 of the subsequent concrete formwork 51 is covered with the previous concrete surface 100. Below, the formwork for two vertical rows is shown in the figure, and the formwork assembling method will be described.

  The concrete surface 100 for assembling the formwork is in a state in which the formwork for placing concrete is removed and the P cone 53 is left. The formwork for one row of joints has a width of 90 cm, a horizontal crosspiece is omitted, and vertical crosspieces 54 are nailed to the center and both side edges so as to protrude downward from the plywood formwork. Is done. A pier support plate 56 is sandwiched between the vertical pier 55 (see FIG. 2B) protruding downward and the concrete surface 100, and a square steel pipe 60 is interposed via a formwork fastener 57. Fixed. The pier support plate 56 has four P-cone insertion holes 59 in accordance with the positions of the four P-cone shafts 40 protruding from the concrete surface 100, and has a height of 20 cm and a length of 180 cm. It is a board that extends in the horizontal direction.

  First, the crosspiece support plate 56 is fitted to the four P-cone shafts 40 so that the positions of the four P-cone insertion holes 59 are aligned and in contact with the concrete surface. Next, the concrete formwork 51 from which the vertical crosspiece 55 is projected downward is applied from above, and the formwork fastener 57 is temporarily fixed to the shaft body 40 of the P cone by screwing. Square steel pipes 60, 60 are arranged in the lateral direction so as to sandwich the steel pipe 60 from above and below, and a nut 62 is screwed into the formwork fastener 57 via the steel pipe holding metal fitting 61, and the square steel pipe 60 is , 60 are pressed against the vertical crosspiece 55.

  The square steel pipe 60 holds down the plurality of vertical piers 54 in two rows of formwork, and the subsequent concrete formwork 51 is assembled at a predetermined position. Since the vertical pier 55 protruding downward is pressed against the concrete surface 100 through the pier support plate 56, the vertical pier 55 does not warp, and the formwork ruptures at the joint portion, and the concrete leaks. I didn't get out. However, the positions of the four P-cones 53 often deviate from the design positions during the previous formwork assembly or the previous concrete placement. For this reason, the attachment of the pier support plate 56 is a very time-consuming work, and has been one of the main reasons why the formwork assembly work cannot be performed efficiently.

  Now, two examples of civil engineering formwork assembly methods using the formwork support of the present invention will be described. First, a first example will be described with reference to FIG. FIG. 3A is a side view of a state in which the formwork is assembled, FIG. 3B is an explanatory view for explaining a process for assembling the formwork, and FIG. 3C is an assembly view of the formwork. FIG. As a first example, the plywood forming the mold 63 is separated into an upper plywood 64 and a pier support plate 65, and a width wider than the length of the central base end 10 of the mold support 1 between them. In this state, a plurality of vertical crosspieces 67 are nailed to form an integral mold 63.

  First, the mold 63 is brought into contact with the previous concrete surface 100 by inserting the screw shaft portion 40 of the P cone 53 into the separation gap 66. Then, the mold support 1 is inserted into the screw shaft portion 40 of the P cone so that the lower end of the upper plywood 64 is supported by the first gap 68 of the mold support, and the screw of the P cone is inserted. A formwork fastener 57 is screwed into the shaft portion 40, and the square steel pipe 60 is pressed against the vertical crosspiece 67 through the square steel pipe 60, the steel pipe retainer 61, and the nut 62 as in the conventional case (FIG. 3A). ), The mold 63 is assembled.

  In this example, the formwork 63 is first applied to the previous concrete, but the formwork support 1 is first placed in contact with the previous concrete surface 100 with the formwork support 1 lying sideways. Then, the mold 63 is brought into contact with the concrete surface 100 later, and then the mold support 1 is rotated around the screw shaft portion 40 so that the upper plywood 64 is sandwiched between the first gaps 68. Good. In addition, the formwork support tool 1 should just stop driving | running | working the nail 69 through the 1st support part and rotating. If it does so, since a formwork assembly work can be performed in the state where the formwork 63 was temporarily placed on the formwork support 1, the formwork assembly becomes more efficient.

  Next, a second example will be described with reference to FIG. FIG. 4A is a side view of a state in which the formwork is assembled, FIG. 4B is an explanatory view for explaining a process for assembling the formwork, and FIG. 4C is a view of assembling the formwork. FIG. As a second example, the pier support plate 75 is not part of the formwork, and is attached between the vertical pier 72 and the previous concrete surface 100 before the formwork fastener is tightened after the formwork 71 is attached. In addition, the crosspiece support plate 75 may be inserted. Since the gap 73 formed by the second support portion is wider than the formwork plywood, the crosspiece support board 75 is in a suspended state, but the nail 74 is driven into the nail hole formed in the formwork support 1. It is only necessary that the crosspiece support plate 75 is temporarily fixed to the formwork support 1. Since the second gap 73 is wider than the mold plywood, it is easy to insert the pier support plate 75 having the same thickness as the mold plywood.

(Contrast with architectural formwork assembly method)
A conventional formwork assembling method for a jointed part of an architectural system will be described with reference to FIG. FIG. 5 is a cross-sectional view for explaining a conventional method for assembling a formwork. In the conventional formwork of the jointing portion, the leg portion 201 of the mold support metal fitting 200 having a substantially L shape is fixed to the screw shaft portion of the P cone, and the square portion 203 is supported by the arm portion 202. The formwork 80 is assembled so that the formwork 80 is placed thereon.

  In FIG. 5, the conventional mold support fitting 200 has a longitudinal direction of about 30 cm, a lateral direction of about 20 cm, and a depth direction of about 4 cm. Inserted into the screw shaft portion of the P cone left on the concrete surface into the long hole for threaded shaft portion formed in the leg portion 201 of the substantially L-shaped mold support bracket, and fixed with a nut. Adjust the height. The square member 203 is placed on the arm portion 202 of the formwork support metal, adjusted in height by the height adjusting bolt 204, and pressed against the previous concrete surface by the pressing means 205. Then, the frame member 81 fixed to the lower edge of the mold 80 is nailed to the square member 203, and the lower portion of the mold 80 is fixed. On the upper side of the mold 80, the facing molds are clamped via a separator and a P cone 53, a mold fastener 57, a square steel pipe 60, a steel pipe presser fitting 61, and a nut 62, and the mold is assembled.

  Here, using the formwork support tool 1 of the present invention, it shows that the formwork can be easily assembled even if the vertical position of the shaft body 40 of the P cone protruding from the previous concrete surface is different. An example of two mold assembly methods of the system will be described. First, with reference to FIG. 6, a first example in the case where the position of the P-cone shaft 40 is close to the joint portion 82 will be described. In FIG. 6, it is sectional drawing explaining the 1st formwork assembly method. In the first formwork assembling method, the second support part 30 of the formwork support 1 is used facing upward. The insertion hole 11 which forms the long hole of the formwork support is inserted into the screw shaft portion 40 of the P cone left on the previous concrete surface 100, and the nut 83 is screwed and temporarily fixed.

  Next, the square member 84 is fitted into the gap formed by the second support part 30 and the previous concrete surface 100 so as to be dropped. After the square member 84 is fitted, the height of the square member 84 is adjusted, and the nut 83 is tightened to fix the mold support 1. The frame member 81 fixed to the lower edge of the mold is fixed to the square member 84 sandwiched between the mold supports 1 with nails. On the upper side of the mold 80, the facing molds are clamped via a separator and a P cone 53, a mold fastener 57, a square steel pipe 60, a steel pipe presser fitting 61, and a nut 62, and the mold is assembled.

  Here, with reference to FIG. 7, the 2nd example in case the position of P cone is far from a joint part is demonstrated. FIG. 7 is a cross-sectional view illustrating a second formwork assembling method. In the second formwork assembling method, the first support part 20 of the formwork support 1 is used facing upward. The insertion hole 11 which forms the long hole of the formwork support is inserted into the screw shaft portion 40 of the P cone left on the previous concrete surface, and the nut 83 is screwed and temporarily fixed.

  In advance, a square member 86 is nailed to the upper edge of the long plywood 85 extending in the lateral direction at a predetermined height, and a height adjusting member 87 is provided. The lower edge of the height adjustment member 87 is inserted into a gap formed by the first support portion 20 directed upward and the concrete surface 100, and nailed. The height of the top end of the square member 86 at the upper edge is adjusted, and the nut 83 is tightened to fix the mold support 1. The frame member 81 fixed to the lower edge of the mold is fixed to the square member 86 fixed to the upper edge of the height adjusting member 87 sandwiched between the mold supports 1 by nail. On the upper side of the mold 80, the facing molds are clamped via a separator and a P cone 53, a mold fastener 57, a square steel pipe 60, a steel pipe presser fitting 61, and a nut 62, and the mold is assembled.

  Further, a preferred method of using the mold support 1 will be described with reference to FIGS. FIG. 8 (A) is a cross-sectional view showing a simple structure of an underground pit, and FIG. 8 (B) is an assembly method of a floor slab form at the upper part of the underground pit using a conventional formwork assembly fitting. FIG. 9 shows an assembling method of the floor slab formwork in the upper part of the underground pit using the formwork fitting 1.

  According to the conventional construction method, the pressure-resistant plate 90 and the underground beam 91 forming an underground pit are integrally cast with concrete. Then, a floor form frame 93 is assembled along the top end of the underground beam 91, and floor concrete is placed. After placing the concrete on the floor, in order to take out the formwork support pillars and the formwork support metal fittings 200 that support the floor formwork (not shown), a human hole 206 for material removal is formed in the floor. In order to fix the floor formwork, a substantially L-shaped formwork support fitting 200 is often used as shown in FIG.

  Since this conventional formwork support metal fitting 200 is made of metal, it rusts due to moisture in the space in the underground beam, and the service life is shortened, and it is difficult to take out from the manhole 206. was there. Therefore, square lumber was sometimes struck onto the concrete frame using concrete nails. However, since the mold support 1 is made of resin, it does not rust. Moreover, since it is small and light, it can be easily removed from the human hole 206, and the form assembly work becomes easy and efficient. In addition, since the attachment method of the mold support 1 is shown previously, the same code | symbol as FIG. 6 is attached | subjected to FIG. 9, and description is abbreviate | omitted.

  In Example 2, the mold support 2 formed by processing the metal plate 94 will be described with reference to FIG. FIG. 10A shows a developed view of the metal plate 94, and FIG. 10B shows a perspective view of the mold support 2. Similar to the mold support 1 of the first embodiment, the mold support 2 includes a central base end portion 10, a first support portion 20, and a second support portion 30, and is integrally formed. The 1st support part 20 and the 2nd support part 30 are extended in the direction spaced apart along a concrete surface.

  The broken line in FIG. 10A indicates a valley fold, and the alternate long and short dash line indicates a mountain fold. The metal flat plate 94 shown in FIG. 10A is bent along the broken line and the alternate long and short dash line in the drawing, and the metal plate 94 is bent. The side plate 95 that forms the second support portion is formed so as to form a curved portion on the inner surface side, and serves as a square member clamping member pressing means. An edge where the side plate 96 extending from the central base end portion 10 contacts the side plate 97 of the first support portion 30, and an edge where the side plate 96 extending from the central base end portion 10 contacts the side plate 95 of the second support portion 30. The part is fixed to the mold support 2 by welding. Although the formwork support 2 is made of metal, it is small and light and has good workability. A curved portion 98 is formed on the side plate of the second support portion, and the protruding portion of the curved portion of the side plate is pressed against the square member to function as the second support portion. Nail holes are formed in the first support part and the second support part.

  In Example 3, a mold support 3 formed by processing a metal plate will be described with reference to FIG. In FIG. 10, the same symbols as those in the first embodiment are given, and description of the operation and effect is omitted. The mold support 3 is made of an integral metal plate, and the central base end portion 10, the first support portion 20, and the second support portion 30 are formed by bending the metal plate. The leg portion 13 falls from the surface side of the first support portion 10, the flange portion 14 is bent outward from the position where the leg portion 13 contacts the previous concrete surface, and the flange portion 14 contacts the previous concrete surface. The distance between the inner surface of the first support portion 20 and the previous concrete surface and the distance between each position of the second support portion 30 and the previous concrete surface are the same as those of the mold support 1 of the first embodiment.

(Other)
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The technical scope of the present invention is shown not by the above description but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

1, 2, 3 ... Formwork support,
100 ... the concrete surface ahead,
DESCRIPTION OF SYMBOLS 10 ... Center base end part, 20 ... 1st support part, 30 ... 2nd support part, 40 ... Screw shaft part,
DESCRIPTION OF SYMBOLS 11 ... Insertion hole, 12 ... Inner surface of center base end part, 13 ... Leg part, 14 ... Butt part,
22 ... Expanded part, 23 ... Nail hole, 31 ... Standing part, 32 ... Bent part, 33 ... Base end part,
34 ... Open end part, 35 ... Center part, 36 ... Expanding part, 37 ... Nail hole,
51 ... Rear concrete formwork, 52 ... Lower inner surface, 54 ... Vertical pier, 53 ... P cone,
55 ... Vertical piercing projecting downward, 56 ... piercing support plate, 57 ... formwork fastener,
59 ... P cone insertion hole, 60 ... Square steel pipe, 61 ... Steel pipe retainer, 63 ... Formwork,
64 ... upper plywood, 65 ... pier support plate, 66 ... separation gap, 67 ... vertical pier,
68 ... 1st clearance, 62 ... Nut, 71 ... Formwork, 72 ... Vertical crosspiece, 73 ... Clearance,
74 ... nail, 75 ... pier support plate,
200: Formwork support hardware, 201: Leg part, 202: Arm part, 203 ... Square bar,
204 ... Height adjusting bolt, 205 ... Pressing means, 206 ... Human hole,
80 ... Formwork, 81 ... Frame material, 82 ... Joint portion, 83 ... Nut, 84 ... Square material,
85 ... Long plywood, 86 ... Square, 87 ... Height adjustment member,
90 ... pressure-resistant plate, 91 ... underground beam, 93 ... floor formwork, 94 ... metal plate, 95 ... side plate,
96 ... side plate, 97 ... side plate, 98 ... curved portion

Claims (6)

A formwork support fixed to a screw shaft protruding from a concrete surface previously placed,
The mold support includes a central base end portion, a first support portion, and a second support portion that form an integral body,
The central base end portion is disposed in contact with the concrete surface and has a long hole into which the screw shaft portion is inserted, and the distance from the concrete surface to the surface of the central base end portion is a mold plywood. Is the same as the thickness of
The first support part and the second support part extend in the opposite direction from the central base end part along the concrete surface,
The clearance between the inner surface of the first support portion and the concrete surface is different from the clearance between the inner surface of the second support portion and the concrete surface,
With the formwork support fixed to the concrete surface,
The formwork plywood can be sandwiched in the gap between the inner surface of the first support part and the concrete surface,
A corner member thicker than the thickness of the formwork plywood can be sandwiched in a gap where the inner surface of the second support part and the concrete surface are separated from each other.
Formwork support characterized by the above. The second support part has a clamping member pressing means on the side facing the concrete surface,
The clamping member pressing means is a curved portion that is gently curved convexly toward the concrete surface,
The minimum separation distance between the curved portion and the concrete surface is a size that sandwiches the first corner member,
The separation distance between the base end portion of the curved portion and the concrete surface is a size that sandwiches a second corner member that is thicker than the first corner member,
The formwork support according to claim 1. The long hole is a long hole extending along a direction in which the first support part and the second support part extend.
The formwork support according to claim 1 or 2, characterized in that. A nail hole is drilled in at least the second support part of the first support part and the second support part,
The formwork support according to any one of claims 1 to 3, wherein: The outer end of at least one of the first support portion and the second support portion includes an inclined portion formed so that the inner surface shape is inclined so as to expand outward.
The formwork support according to any one of claims 1 to 4, wherein the mold support is provided. The mold support is made of resin;
The formwork support according to any one of claims 1 to 5, wherein: